JP2013082908A - Agitation equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide agitation equipment used when producing an ink composition for offset printing, or a production intermediate, wherein the agitation equipment can make kneading and dispersion of materials to be agitated, by applying shear force to the materials to be agitated while exerting sufficient agitation flow to the materials.SOLUTION: The agitation equipment 100 is equipped with first and second rotating shafts 26, 27 inserted through a tank lid 21 for hermetically sealing the tank body 20, which are concentric biaxial rotating shafts each independently rotates. A first agitation blade 10 is fixed to the first rotating shaft 26, and provided in no contact state with the bottom 201 and side wall 202 in the inside space of the tank body 20. A second agitation blade 22 is fixed to the second rotating shaft 27, and provided in contact with the bottom 201 and the side wall 202 in the inside space of the tank body 20. Moreover a driving means 28 rotates the first rotary shaft 26 at higher speed than the second rotary shaft 27.

Description

  The present invention relates to a stirrer used when producing an ink composition for offset printing or an intermediate for producing an ink composition for offset printing.

  Offset printing is a printing method characterized in that ink supplied on a printing plate is transferred to an intermediate transfer body such as a rubber blanket and then printed on a printing medium such as paper. Offset printing is a typical printing method widely used in fields such as commercial printing and newspaper printing because it can print a large amount of high-definition and clear images in a short time. . In the ink composition for offset printing used in this printing method, rosin-modified phenolic resin, rosin-modified maleic acid resin and the like are widely used as main resin components. Although the molecular weight of the resin constituting these resin components varies depending on the type, it is generally several tens of thousands to several hundreds of thousands, and the softening point varies from about 150 ° C. to over 200 ° C. . The resin constituting the resin component is generally appropriately used depending on the required properties of the offset printing ink composition.

  The ink composition for offset printing basically comprises an oil component comprising a mineral oil component and / or a vegetable oil component, a resin component, and a pigment, but is not produced by mixing them at once. Usually, first, the resin component is first dissolved in the oil component, and the formation of an intermediate called a resin varnish is generally performed. And an ink composition for offset printing is finally obtained by blending a pigment and various additives into the resin varnish.

  By the way, the resin constituting the resin component of the ink composition for offset printing is usually synthesized by bulk polymerization (bulk polymerization) in a resin maker, and crushed into block or flake solid resin as an ink maker To be supplied. Such a solid resin in a lump state does not dissolve even when mixed with the oil component as it is. Therefore, when a resin varnish is produced by dissolving the solid resin in the oil component, the solid resin is added to the oil component in the step of dissolving the solid resin in the oil component (hereinafter sometimes referred to as “cooking step”). Then, the mixture is stirred and mixed while being softened by heating above the softening point of the solid resin, and the solid resin is dissolved in the oil component.

  The cooking step is usually performed at a high temperature of about 180 to 250 ° C., although depending on the type of solid resin. Further, even when stirring and mixing at a high temperature, it is necessary to stir and mix for a long time in order to completely dissolve the high-molecular weight solid resin having low solubility in the oil component.

  Thus, when manufacturing a resin varnish, in a cooking process, since solid resin and an oil component are stirred and mixed for a long time under high temperature, much heat energy is required. However, since the resin varnish obtained by stirring and mixing at a high temperature for a long time is stored or used at a temperature of about room temperature (about 25 ° C.) to about 100 ° C., the heat energy input in the cooking process Many will be diffused into the atmosphere by being allowed to cool. Therefore, the heat energy for that amount must be wasted.

  Furthermore, when the oil component that dissolves the solid resin is animal or vegetable oil, a solid selected from rosin-modified phenolic resin and rosin-modified maleic acid resin, which are a kind of polyester resin, is performed at a temperature higher than 200 ° C. There occurs a problem that a transesterification reaction occurs between the resin and the animal and vegetable oil (for example, tri-fatty acid ester of glycerin), and the molecular weight of the solid resin is lowered. When the molecular weight of the solid resin is reduced, an increase in ink misting or occurrence of facing set-off occurs at the time of printing, and printability is greatly reduced. Therefore, it is necessary to suppress the occurrence of the transesterification reaction during the stirring and mixing of the solid resin and the oil component in the cooking step when manufacturing the resin varnish.

  In order to suppress the transesterification reaction, it is effective to use mineral oil as an oil component for dissolving the solid resin or to lower the temperature during stirring and mixing. However, increasing the amount of mineral oil used is contrary to the movement of replacing the oil component of the offset printing ink composition from mineral oil to animal or vegetable oil for the purpose of reducing the environmental load. Moreover, in order to lower the temperature at the time of stirring and mixing in the cooking step, it is sufficient to use a solid resin having a low softening point, but a solid resin having a low softening point is generally a resin having a low molecular weight. . Therefore, offset printing ink compositions that use a solid resin with a low softening point as the resin component cannot avoid increased ink misting or face-to-face set-off during printing, greatly reducing printability. To do.

  In order to solve such a problem, for example, in Patent Document 1, a solid resin is dissolved in a high-boiling solvent such as mineral oil at a high temperature (200 ° C. or higher), and then at a low temperature (80 to 180 ° C.). A method for producing a resin varnish that is soluble in animal and vegetable oils is disclosed. According to the method for producing a resin varnish disclosed in Patent Document 1, mineral oil is used as the oil component in the step of dissolving the solid resin at a high temperature, and no animal or vegetable oil is present. The transesterification reaction can be suppressed to some extent. Moreover, in the manufacturing method of the resin varnish disclosed by patent document 1, since it can suppress that the cooking process under high temperature becomes long, the thermal energy loss at the time of a cooking process can be decreased.

  Moreover, the manufacturing method of the general ink composition for offset printing is, for example, a varnishing step for obtaining a resin varnish by dissolving a resin in an oil component using a stirrer as disclosed in Patent Document 2. , A premixing step of stirring and mixing the pigment and the resin varnish using a stirrer to obtain a pigment dispersion mixture, and a pigment dispersion mixture by dispersing the pigment dispersion mixture using a dispersing device such as a three-roll mill or a bead mill. A dispersion step for obtaining a product, and a post-addition step for obtaining an ink composition for offset printing by stirring and mixing the pigment dispersion and the remaining ink material (such as a varnish for viscosity adjustment) using a stirring device such as a disper Including.

  According to the method for producing an ink composition for offset printing disclosed in Patent Document 2, an ink composition for offset printing in which pigments are finely dispersed can be obtained by combining these plural steps.

JP 2005-47950 A JP 2007-169464 A

  However, since the method for producing a resin varnish disclosed in Patent Document 1 includes a step of dissolving a solid resin in an oil component at a high temperature, it is a production method capable of sufficiently reducing thermal energy loss. I can't say that. In addition, the conventional method for producing an ink composition for offset printing disclosed in Patent Document 2 requires a lot of energy and labor in order to finely disperse the pigment, and the production time is prolonged and the productivity is lowered. Therefore, there is a point to be improved.

  In addition, in the prior art disclosed in Patent Documents 1 and 2, when manufacturing an ink composition for offset printing or an intermediate for manufacturing an ink composition for offset printing, a plurality of facilities are required, and one device is required. Thus, there is a problem that an ink composition for offset printing or a production intermediate for the ink composition for offset printing cannot be obtained.

  In the production of the ink composition for offset printing, a pigment in a dry state in which pigment particles are firmly aggregated is used as the pigment. Therefore, in order to obtain an ink composition for offset printing in which the pigment is finely dispersed, at the time of production of the ink composition for offset printing, the pigment is given a force capable of dispersing even fine primary particles. It is necessary to prevent re-aggregation of the pigment particles once dispersed.

  In order to disperse the pigment to the primary particles, it is necessary to sufficiently wet the pigment. However, in the conventional method for producing an ink composition for offset printing using a resin varnish obtained by dissolving a resin in an oil component as a material for wetting the pigment, when the pigment and the resin varnish are stirred and mixed, It takes time until the pigment is sufficiently wetted by the resin varnish.

  This is because the resin varnish, which is a material of a high-viscosity paste ink composition for offset printing and finished to a high viscosity, does not easily penetrate into the aggregate of pigment particles having an uneven surface. Further, the air existing on the surface and inside of the pigment particle aggregate is blocked by the high-viscosity resin varnish to form bubbles, and the generated bubbles are formed on the surface and inside of the pigment particle aggregate. This is because the presence of the resin makes it difficult for the resin varnish to penetrate into the pigment. In addition, since the force imparted to the pigment in the dispersion step is reduced by the bubbles, it is difficult to impart a force capable of dispersing even fine primary particles to the pigment.

  In order to prevent re-aggregation of the pigment particles once dispersed, it is necessary that the resin dissolved in the oil component is adsorbed on the surface of the pigment particles. Even if the pigment particles to which the resin is not adsorbed are dispersed once, the dispersion state is unstable, so that the pigment particles are easily re-aggregated. However, the bubbles generated on the surface and inside the aggregate of pigment particles as described above cause the resin dissolved in the oil component to be prevented from adsorbing on the pigment surface.

  In this way, in order to remove the bubbles that inhibit the penetration of the pigment particles of the resin varnish into the aggregate and the adsorption of the resin onto the surface of the pigment particles from the surface of the pigment particle aggregate, in the premixing step, In addition, it is necessary to lengthen the stirring time by the stirrer, and in the dispersion step, it is necessary to apply a larger amount of force to the pigment by the disperser and to perform a long-time dispersion treatment. A lot of energy and labor are required for operation, and the manufacturing time becomes long.

  In order to dissolve the resin component in the oil component during the production of the conventional resin varnish, it is necessary to stir and mix at a high temperature, and in order to uniformly disperse the pigment, it is necessary to lengthen the stirring time. This is because the stirring ability of the conventional stirring device used when producing the ink composition for offset printing is insufficient.

  In a conventional stirring apparatus, a stirring blade such as a disk turbine blade is provided in a tank that accommodates an object to be stirred. By rotating the stirring blade, a shearing force is applied to the object to be stirred. It is configured to perform kneading and dispersion.

  Since the resin varnish and the ink composition for offset printing containing the resin varnish are compositions having a high viscosity, the conventional stirring device as described above is particularly a tank in a position away from the stirring blade in the tank. In the vicinity of the inner peripheral surface, the shearing force applied to the object to be stirred is weak, and the object to be stirred cannot be sufficiently kneaded and dispersed. Furthermore, in the conventional stirring apparatus, the action of the stirring flow on the stirred object in the vicinity of the inner peripheral surface of the tank is weak, so that the stirred object easily adheres to the inner peripheral surface of the tank. Cannot be performed sufficiently.

  Accordingly, an object of the present invention is a stirrer used when manufacturing an ink composition for offset printing or an intermediate for producing an ink composition for offset printing, and a sufficient stirring flow is applied to the object to be stirred. The stirrer is capable of imparting a shearing force to the object to be stirred and sufficiently kneading and dispersing the object to be stirred, and the ink composition for offset printing or the ink composition for offset printing can be obtained with a single device. It is providing the stirring apparatus which can obtain the manufacturing intermediate of.

The present invention relates to an offset printing ink composition comprising an ink material mainly composed of a pigment, a resin component, and an oil component, or stirring used for producing a production intermediate of the offset printing ink composition. A device,
A bottomed cylindrical tank main body that is formed by a cylindrical side wall portion that is continuous with the bottom portion, and that contains an object to be stirred that is at least a part of the ink material;
A tank lid body detachably provided at an end portion of the side wall portion opposite to the side continuous with the bottom portion;
Heating means provided facing the bottom and the side wall from the outside;
First and second rotation shafts that are inserted through the tank lid and rotate independently of each other around a central axis of the tank body;
A first agitating blade fixed to the first rotating shaft and provided in a non-contact state with respect to the bottom and the side wall in the tank body;
A second stirring blade fixed to the second rotating shaft and provided in contact with the bottom and the side wall in the tank body;
Drive means for driving the first and second rotating shafts to rotate independently of each other, and driving means for rotating the first rotating shaft at a higher speed than the second rotating shaft. It is a stirring device.

In the stirring device of the present invention, the second rotation shaft is formed in a cylindrical shape,
The first rotating shaft is inserted through the second rotating shaft and extends from one end in the axial direction of the second rotating shaft toward the bottom.

In the stirring device of the present invention, the side wall portion is
A first wall portion that is continuous with the bottom portion and is inclined with respect to the central axis line so as to move away from the central axis line as the distance from the bottom portion increases;
And a second wall portion connected to the first wall portion and parallel to the central axis.

  The stirring device of the present invention is a third stirring blade fixed to the first rotating shaft or the second rotating shaft and provided in a non-contact state with respect to the bottom portion and the side wall portion in the tank body. And a third agitating blade provided apart from the first agitating blade in the direction in which the central axis extends.

  In the agitation apparatus of the present invention, the driving means rotates the first and second rotating shafts in directions opposite to each other.

  The stirring device of the present invention is further characterized by further comprising reduced pressure dehydrating means for depressurizing the inside of the tank body with the tank lid mounted thereon to dehydrate moisture from the object to be stirred.

  In the stirring device of the present invention, the first stirring blade includes a disk-like base portion fixed perpendicularly to the first rotation shaft, and a blade that extends radially outward from the base portion. And

In the stirring device of the present invention, the blade is
A first blade that is inclined so as to be separated from one side with respect to a virtual plane including the surface of the base as it goes radially outward from the base,
A second blade that is inclined so as to be separated from the virtual plane toward the other side as it goes radially outward from the base portion;
And a third blade that extends radially outward from the base and extends along the virtual plane.

  In the stirring device of the present invention, the first and second blades bend at a position inclined inward in the radial direction of the base portion from the upstream side in the rotational direction toward the downstream side in the rotational direction, and continue to the base portion. It is characterized by being.

  The stirrer according to the present invention is characterized in that the edge of the first, second and third blades facing the downstream side in the rotational direction is formed in a tapered shape facing the downstream side in the rotational direction.

  According to the present invention, the stirring device produces an ink composition for offset printing composed of an ink material mainly composed of a pigment, a resin component, and an oil component, or a production intermediate for the ink composition for offset printing. And a tank lid, a heating unit, first and second rotating shafts, first and second stirring blades, and a driving unit.

  The tank body is formed by a bottom part and a cylindrical side wall part connected to the bottom part, and accommodates an object to be stirred which is at least a part of the ink material. The tank lid is detachably provided at an end portion of the side wall portion opposite to the side continuous with the bottom portion, and makes the internal space of the tank main body a sealed space in a mounted state. The heating means is provided facing the outside from the outside on the bottom and side walls, and heats the object to be stirred accommodated in the tank body. The first and second rotating shafts are concentric two-axis rotating shafts that are inserted through the tank lid and rotate independently of each other around an axis that is collinear with the central axis of the tank body. The first stirring blade is fixed to the first rotating shaft, and is provided in a non-contact state with respect to the bottom portion and the side wall portion in the tank body. The second stirring blade is fixed to the second rotating shaft, and is provided in contact with the bottom and the side wall in the tank body. The drive means rotates the first rotation shaft at a higher speed than the second rotation shaft.

  In the stirring device of the present invention configured as described above, the first stirring shaft fixed to the first rotating shaft that is rotated at high speed by the driving means while heating the stirring object accommodated in the tank body by the heating means. With one stirring blade, a stirring flow can be applied while applying a shearing force. Furthermore, since the stirring device of the present invention has the second stirring blade fixed to the second rotating shaft rotated by the driving means and provided in contact with the bottom and side walls of the tank body, this second The stirring blade can be rubbed against the inner peripheral surface of the tank body, and a stirring flow can be applied to the stirred object while suppressing the adherence of the stirred object to the inner peripheral surface of the tank body. As a result, the stirring device can impart a shearing force to the material to be stirred while applying a sufficient stirring flow to the material to be stirred, and can sufficiently knead and disperse the material to be stirred.

  According to the invention, the second rotating shaft is formed in a cylindrical shape. The first rotating shaft is inserted through the second rotating shaft and extends from one end in the axial direction of the second rotating shaft toward the bottom of the tank body. In this way, concentric two-axis first and second rotating shafts can be configured.

  According to the invention, the side wall portion of the tank body includes the first wall portion and the second wall portion. The first wall portion is connected to the bottom portion, and is inclined with respect to the central axis line so as to move away from the central axis line of the tank body as the distance from the bottom portion increases. The second wall portion is connected to the first wall portion and is formed to extend in parallel to the central axis. The tank body having such a side wall portion including the first wall portion and the second wall portion is formed in a tapered shape as the inner space formed by the bottom portion and the side wall portion approaches the bottom portion in the central axis direction. It will be. Thereby, it is possible to efficiently apply the stirring flow in the direction of the central axis to the stirring target accommodated in the internal space of the tank body.

  According to the invention, the stirring device further includes a third stirring blade. The third stirring blade is fixed to the first rotating shaft or the second rotating shaft, and is provided in a non-contact state with respect to the bottom portion and the side wall portion in the tank body. It is spaced apart from the wing. As a result, the agitated flow can be applied to the agitated material accommodated in the tank body while the shear force is applied even with the third agitating blade, so that the agitated material is sufficiently kneaded and dispersed. be able to.

  According to the invention, the driving means rotates the first rotating shaft and the second rotating shaft in directions opposite to each other. As a result, a larger agitation flow can be applied to the agitated object accommodated in the tank body.

  According to the invention, the stirring device further includes a vacuum dehydrating means. Thus, for example, when the object to be stirred contains water, the inside of the tank body that has been sealed with the tank lid attached is decompressed by the vacuum dehydrating means, and the water is dehydrated from the object to be stirred. be able to.

  According to the invention, the first stirring blade includes a disk-like base portion that is fixed perpendicularly to the first rotation shaft, and a blade that extends radially outward from the base portion. Thereby, a high shearing force can be applied to the object to be stirred flowing along the stirring flow in the tank body.

  According to the invention, the blade of the first stirring blade includes the first blade, the second blade, and the third blade. The first blade is a blade that is inclined so as to be separated to one side with respect to a virtual plane (rotation surface) including the surface of the base as it goes radially outward from the base. The second blade is a blade that is inclined so as to separate away from the rotation surface of the base toward the other side as it goes radially outward from the base. The third blade is a blade that extends radially outward from the base and extends along the rotation surface of the base. Thereby, a high shearing force can be applied to the object to be stirred flowing along the stirring flow in the tank body.

  Further, according to the present invention, the first and second blades of the first stirring blade are bent at a position inclined inward in the radial direction from the upstream side in the rotational direction toward the downstream side in the rotational direction, and are connected to the base portion. . Thereby, when the first stirring blade is rotated, a stirring flow acts on the object to be stirred. Therefore, the material to be stirred is stirred and mixed while flowing in the tank body along the stirring flow, so that the material to be stirred can be sufficiently kneaded and dispersed.

  Moreover, according to this invention, the edge part which faces the rotation direction downstream of the 1st, 2nd, and 3rd braid | blade of a 1st stirring blade is formed in the taper shape which faces the rotation direction downstream. Accordingly, when the first stirring blade is rotated, the object to be stirred can be cut by the edge portion of each blade formed in a tapered shape. Therefore, a high shearing force can be applied to the object to be stirred flowing along the stirring flow in the tank body.

It is a figure which shows the structure of the stirring apparatus 100 which is one Embodiment of this invention. It is a figure which shows the structure of the 1st stirring blade 10 with which the stirring apparatus 100 is equipped. Ah 1 is a diagram illustrating a configuration of a manufacturing system 1. FIG. 1 is a diagram illustrating a configuration of a manufacturing system 2. FIG.

  FIG. 1 is a diagram illustrating a configuration of a stirring device 100 according to an embodiment of the present invention. The stirrer 100 is an apparatus used to produce an ink composition for offset printing or a production intermediate for an ink composition for offset printing.

[Ink composition for offset printing]
First, components of the offset printing ink composition will be described. The ink composition for offset printing is composed of an ink material mainly composed of a pigment, a resin component, and an oil component. Examples of the pigment include colorless or colored inorganic pigments or organic pigments. Specific examples include inorganic pigments such as titanium dioxide, barium sulfate, calcium carbonate, magnetic iron oxide, silica, kaolin pigment, bentonite, organic pigments such as azo pigments, lake pigments, phthalocyanine pigments, isoindoline pigments, anthraquinone pigments, and quinacridone pigments. Examples thereof include pigments and carbon black.

  Examples of the resin component include synthetic resins and natural resins. For example, rosin-modified phenol resins, rosin-modified maleic resins, alkyd resins, polyester resins, petroleum resins, gilsonite resins, and the like for ink compositions for offset printing. Resins commonly used as the resin component can be listed.

  Further, the resin component may be crosslinked with an appropriate amount of a gelling agent (about 15% by mass or less based on the resin component). Examples of the gelling agent used in such a case include aluminum alcoholates and aluminum chelate compounds. Preferred specific examples include aluminum triisopropoxide, mono-sec-butoxyaluminum diisopropoxide, aluminum trioxide. Examples include -sec-butoxide, ethyl acetate aluminum diisopropoxide, and aluminum trisethyl acetoacetate.

  The oil component is not particularly limited as long as it can dissolve the resin component, and examples include oil oil components of offset printing ink compositions such as those derived from vegetable oil and mineral oil. These can be used alone or in combination.

  Examples of the vegetable oil-derived oil component include vegetable oils themselves, fatty acid esters and polymerized oils made from vegetable oils as raw materials. These can be used alone or in combination.

  As the vegetable oil, linseed oil, tung oil, soybean oil, rapeseed oil, cottonseed oil, corn oil, palm oil and the like can be used regardless of drying oil or non-drying oil, but when printing is dried by air oxidation after printing A dry oil or semi-dry oil is preferably used for. Among them, linseed oil, tung oil, and soybean oil are preferably used as the oil component of the ink composition for offset printing, and these can be used alone or in combination.

  Examples of the fatty acid ester using the vegetable oil as a raw material include a monoester compound of a drying oil or a semi-drying oil. That is, the fatty acid constituting the fatty acid monoester is exemplified by fatty acids having an alkyl main chain of about 15 to 20 carbon atoms such as stearic acid, isostearic acid, hydroxystearic acid, oleic acid, linoleic acid, linolenic acid, and eleostearic acid. it can. Examples of the alcohol-derived alkyl group constituting the fatty acid monoester include alkyl groups having about 1 to 10 carbon atoms such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, and 2-ethylhexyl. Among these, soybean oil fatty acid monoester is preferred from the viewpoint of the drying property of the ink composition for offset printing obtained. These fatty acid monoesters can be used alone or in combination of two or more.

  Moreover, as an oil component derived from mineral oil, mineral oil itself or a petroleum solvent is mentioned. Among these, an oil component having a boiling point of 160 ° C. or higher, preferably 200 ° C. or higher, which is incompatible with water, which is used as an oil component of an offset printing ink composition, can be suitably used. Specifically, mineral oil such as light oil, spindle oil, machine oil, cylinder oil, turpentine oil, mineral spirit, n-paraffin solvent, isoparaffin solvent, naphthene solvent, aromatic solvent, α-olefin, etc. These petroleum solvents can be exemplified, and these solvents can be used singly or in combination of two or more, but it is preferable to use a non-aromatic solvent from the viewpoint of reducing environmental burden. Specific examples of non-aromatic solvents include No. 0 Solvent, AF Solvent No. 5, AF Solvent No. 6, AF Solvent No. 7 (all of which are manufactured by Nippon Oil Corporation).

  The ink composition for offset printing may also contain extender pigments, pigment dispersants, surface leveling aids, friction resistance improvers, anti-set-off agents, antioxidants, nonionic surfactants, and the like. .

[Production intermediate of ink composition for offset printing]
The production intermediate of an ink composition for offset printing is an intermediate composition for producing an ink composition for offset printing, for example, a resin varnish mainly composed of a resin component and an oil component, an extender pigment, Examples thereof include an extender base mainly composed of a resin component and an oil component.

[Configuration of stirring device]
The stirring device 100 of the present embodiment includes a tank body 20, a tank lid 21, a first rotating shaft 26 and a second rotating shaft 27, a first stirring blade 10 and a second stirring blade 22, and a heating means 25. , Drive means 28 and vacuum dehydration means 30. In addition, the stirring device 100 further includes a third stirring blade 15.

  The tank body 20 is formed in a bottomed cylindrical shape, and has an internal space formed by a bottom portion 201 and a side wall portion 202 continuous with the bottom portion 201, and the agitated body that is at least a part of the ink material in the internal space. Holds things. The tank body 20 is made of a metal material such as stainless steel.

  The bottom 201 is a plate-like body that is formed to be curved so as to protrude toward one side (vertically in the vertical direction) in the central axis S direction of the tank body 20, and is a part of the internal space of the tank body 20. It forms a space that roughly forms part of a sphere. In addition, a tank discharge opening 23 is provided at the center of the bottom 201 for discharging the object to be stirred that is accommodated in the internal space of the tank body 20 to the outside. In the vicinity of the tank discharge opening 23, a temperature sensor 29 for measuring the temperature of the object to be stirred accommodated in the internal space of the tank body 20 is provided. The bottom 201 has a length H4 in the direction of the central axis S set to, for example, about 287 mm, and a length in the direction perpendicular to the central axis S (the inner diameter of the peripheral edge) W2 set to, for example, about 1150 mm. Although numerical values are shown for “H4” and “W2”, these numerical values are merely examples.

  Side wall 202 includes a first wall 2021 and a second wall 2022. The first wall 2021 is a cylindrical body that is connected to the peripheral edge of the bottom 201 and is inclined with respect to the central axis S so as to move away from the central axis S as the distance from the bottom 201 increases. The first wall 2021 forms an inverted frustoconical space portion that is a part of the internal space of the tank body 20. The first wall 2021 has a length H3 in the direction of the central axis S set to about 1303 mm, for example, and an inclination angle θ3 with respect to the central axis S set to about 14 °, for example. Although numerical values are shown for “H3” and “θ3”, these numerical values are merely examples.

  The second wall 2022 is a cylindrical body that is connected to the peripheral edge of the first wall 2021 opposite to the side connected to the bottom 201 and is formed in parallel to the central axis S. The second wall 2022 forms a cylindrical space portion that is a part of the internal space of the tank body 20. The second wall 2022 has a length H2 in the direction of the central axis S set to, for example, about 807 mm, and a length in the direction perpendicular to the central axis S (inner diameter of the peripheral edge) W1 set to, for example, about 1800 mm. . Although numerical values are shown for “H2” and “W1”, these numerical values are merely examples.

  The tank lid 21 has a peripheral edge on the side opposite to the side connected to the bottom 201 of the side wall 202, that is, the side opposite to the side connected to the first wall 2021 of the second wall 2022. The inner space of the tank body 20 is made a sealed space in a state in which the tank body 20 is mounted in a detachable manner at the peripheral edge of the tank body 20. The tank lid 21 is made of a metal material such as stainless steel. In the present embodiment, the tank lid 21 has a length H1 in the central axis S direction set to, for example, about 369 mm. In addition, although the numerical value was shown about "H1", this numerical value is only an illustration to the last.

  In addition, the tank lid 21 is provided with a tank supply opening 24 for supplying an object to be stirred from the outside to the internal space of the tank body 20 in a state where the tank lid 21 is mounted. Further, the tank lid 21 is provided with a connection opening 31 for connecting to a later-described depressurization dehydrating means 30 for depressurizing the gas phase portion in the sealed tank body 20 with the tank lid 21 attached. Yes.

  The heating means 25 is provided to face the outer peripheral surfaces of the bottom portion 201 and the side wall portion 202 of the tank main body 20, and heats the agitated material accommodated in the tank main body 20. The heating means 25 is configured to be able to control the temperature in the tank body 20 by allowing a fluid such as water to flow from the fluid supply opening 251 toward the fluid discharge opening 252.

  The first rotating shaft 26 and the second rotating shaft 27 are provided so as to be inserted into the tank lid body 21 and rotate independently of each other around an axis that is collinear with the central axis S of the tank body 20. Is the axis of rotation. In the present embodiment, the second rotating shaft 27 is formed in a cylindrical shape. The first rotating shaft 26 is inserted into the second rotating shaft 27 and extends from one end in the axial direction of the second rotating shaft 27 (the end on the bottom 201 side) toward the bottom 201 of the tank body 20. .

  The first rotating shaft 26 is inserted into the first shaft seal 261 and sealed by the first shaft seal 261. The second rotating shaft 27 is inserted into the second shaft seal 271 and is sealed by the second shaft seal 271.

  The first agitating blade 10 is fixed to one end of the first rotating shaft 26 in the axial direction (a portion extending from one end of the second rotating shaft 27 in the axial direction), and the bottom 201 and the side wall in the internal space of the tank body 20. The unit 202 is provided in a non-contact state. The first stirring blade 10 is a member made of a metal material such as stainless steel. Details of the first stirring blade 10 will be described later.

  The second stirring blade 22 is a plate-like body that is fixed to the second rotating shaft 27 and provided in contact with the bottom 201 and the side wall 202 in the internal space of the tank body 20. The second stirring blade 22 is a member made of a metal material such as stainless steel. In the present embodiment, the second stirring blade 22 extends in a belt shape along the second wall portion 2022 from the first portion 221 extending from the second rotating shaft 27 to the second wall portion 2022 and from the first portion 221. A second portion 222 that contacts the second wall portion 2022, a third portion 223 that extends from the second portion 222 along the first wall portion 2021 and contacts the first wall portion, and a third portion. A fourth portion 224 that extends in a strip shape along the bottom portion 201 and contacts the bottom portion 201 is included.

  The second stirring blade 22 is set to have a thickness of about 20 to 40 mm and a width of about 100 to 200 mm. In addition, although the numerical range was shown about the thickness and the width length of the 2nd stirring blade 22, these numerical ranges are only illustrations to the last.

  In the present embodiment, the fourth portion 224 of the second stirring blade 22 corresponds to the center of the bottom 201 where the tank discharge opening 23 is provided, and has a gap with respect to the bottom 201 that does not contact the bottom 201. And a curved portion 224a that is curved. The curved portion 224a is formed in the fourth portion 224 that contacts the bottom portion 201 of the second stirring blade 22, so that the object to be stirred contained in the tank main body 20 is discharged from the tank discharge opening 23. The flow of the agitated material can be made smooth.

  The third stirring blade 15 is fixed to the first rotating shaft 26 or the second rotating shaft 27 (FIG. 1 shows an example in which the third stirring blade 15 is fixed to the first rotating shaft 26). In the internal space of the tank body 20, the tank body 20 is provided in a non-contact state with respect to the bottom 201 and the side wall 202. The third stirring blade 15 is provided away from the first stirring blade 10 in the direction in which the central axis S of the tank body 20 extends. In the present embodiment, the third stirring blade 15 is positioned on the tank lid body 21 side of the first stirring blade 10 with respect to the direction in which the central axis S of the tank body 20 extends, specifically, the first stirring blade 15 in the tank body 20. It is provided at a position in the vicinity of the connection portion between the wall 2021 and the second wall 2022.

  The third stirring blade 15 is a member made of a metal material such as stainless steel. The third agitating blade 15 has a base fixed perpendicularly to the first rotating shaft 26 or the second rotating shaft 27 and a radially outward direction from the base, like the first agitating blade 10 described in detail later. And a plurality of blades connected to each other. The shape of the third stirring blade 15 is the same as that of the first stirring blade 10.

  The drive means 28 rotates the first rotating shaft 26 and the second rotating shaft 27 independently of each other, and rotates the first rotating shaft 26 at a higher speed than the second rotating shaft 27. The drive means 28 includes a first drive unit 281 for rotating the first rotation shaft 26 and a second drive unit 282 for rotating the second rotation shaft 27. The rotation speed of the first rotation shaft 26 by the first drive unit 281 is set to 100 to 1000 rpm (circumferential speed 2.4 m / s to 240 m / s), and the rotation speed of the second rotation shaft 27 by the second drive unit 282 is It is set to 5 to 30 rpm (circumferential speed 0.5 m / s to 3.0 m / s).

  In addition, the rotation directions of the first rotation shaft 26 and the second rotation shaft 27 may be the same or different. However, it is preferable that the rotation directions are set in opposite directions in the tank body 20. A larger stirring flow can be imparted to the housed object to be stirred.

  In the stirring apparatus 100 of the present embodiment configured as described above, the first drive unit 281 is rotated at a high speed while being heated by the heating means 25 with respect to the stirring object accommodated in the tank body 20. With the first stirring blade 10 fixed to the one rotating shaft 26, a stirring flow can be applied while applying a shearing force. Furthermore, the stirring device 100 includes a second stirring blade 22 that is fixed to the second rotating shaft 27 that is rotated by the second drive unit 282 and is provided in contact with the bottom 201 and the side wall 202 of the tank body 20. Therefore, the second agitating blade 22 rubs the inner peripheral surface of the tank body 20 to prevent the agitated object from adhering to the inner peripheral surface of the tank body 20 and to apply a stirring flow to the agitated object. Can act. Furthermore, the stirring device 100 is fixed to the second rotating shaft 27 and has the third stirring blade 15 in a non-contact state at the bottom 201 and the side wall 202 of the tank body 20. Thus, a stirring flow can be applied while applying a shearing force to the object to be stirred. As a result, the stirring device 100 can impart a shearing force to the stirring object while sufficiently applying a stirring flow to the stirring object, and can sufficiently knead and disperse the stirring object.

  Further, in the stirring device 100 of the present embodiment, the side wall 202 of the tank body 20 includes a first wall 2021 that forms an inverted frustoconical space portion as a part of the internal space of the tank body 20. The tank body 20 having such a side wall portion 202 is formed in a tapered shape as the internal space formed by the bottom portion 201 and the side wall portion 202 approaches the bottom portion 201 in the central axis S direction. As a result, a stirring flow can be efficiently applied in the direction of the central axis S to the stirring object accommodated in the internal space of the tank body 20.

  In addition, the stirring device 100 of the present embodiment further includes a reduced pressure dehydrating unit 30. The reduced pressure dewatering means 30 includes a reduced pressure dewatering unit composed of a decompression device and a distilled water recovery unit composed of a separator and a condenser. The vacuum dehydrating unit of the vacuum dehydrating means 30 depressurizes the sealed tank body 20 with the tank lid 21 attached thereto, and dehydrates water from the stirred object when the stirred object contains water. To do. The distilled water recovery unit of the vacuum dehydration unit 30 separates the water dehydrated by the vacuum dehydration unit with a separator, and liquefies the separated water with a condenser to recover it as distilled water.

  Next, the first stirring blade 10 will be described in detail. The configuration of the first stirring blade 10 described below can also be applied to the third stirring blade 15. FIG. 2 is a diagram illustrating a configuration of the first stirring blade 10 provided in the stirring device 100. 2A is a development view of the first stirring blade 10, FIG. 2B is a plan view of the first stirring blade 10, and FIG. 2C is a side view of the first stirring blade 10. The figure is shown.

  The first stirring blade 10 includes a base 11, a first blade 12, a second blade 13, and a third blade 14. The arrangement position of the first stirring blade 10 in the direction of the central axis S is a height position where the distance H5 from the bottom 201 of the tank body 20 is, for example, about 600 mm. In addition, although the numerical value was shown about "H5", this numerical value is only an illustration to the last.

  The base 11 is a plate-like portion that is fixed vertically to a first rotation shaft 26 that is driven to rotate in the rotation direction A around a rotation axis that is collinear with the central axis S of the tank body 20. The shape is a regular hexagon. In the first stirring blade 10, a total of six blades including two first blades 12, two second blades 13, and two third blades 14 are arranged in the circumferential direction with respect to the rotation axis. At intervals, the regular hexagonal base 11 is formed so as to continue outward in the radial direction from each side. Each of the six blades 12, 13, and 14 is formed in the same shape and size, and in this embodiment, the shape when viewed in plan is a trapezoid.

  Further, in each of the six blades 12, 13, and 14, the length L2 in the extending direction extending radially outward from the base 11 is 150 with respect to the length L1 of each side of the regular hexagonal base 11. It is preferable to be set to ˜300%. Thereby, the strength of the blades 12, 13, 14 in the first stirring blade 10 can be sufficiently ensured.

  Each of the two first blades 12 is inclined so as to be separated from one side with respect to the rotation surface of the base 11 (a virtual plane including the surface of the base 11) as it goes radially outward from the base 11. It is. The first blades 12 are provided symmetrically with respect to the rotation axis.

  The inclination angle θ1 of the first blade 12 with respect to the rotation surface of the base 11 is preferably set to 30 to 50 °. As a result, when the first stirring blade 10 is driven to rotate, a stirring flow can be applied to the object to be stirred in the tank body 20. Therefore, the material to be stirred is stirred and mixed while flowing in the tank body 20 along the stirring flow, so that the material to be stirred can be sufficiently kneaded and dispersed.

  Further, the first blade 12 is bent at a position inclined inward in the radial direction from the upstream side to the downstream side in the rotation direction A and continues to the base 11. In other words, the first blade 12 is located at a position where the first upstream base end portion 12a on the upstream side in the rotational direction A is separated radially outward from the first downstream base end portion 12b on the downstream side in the rotational direction A. Bent to the base 11. If the 1st stirring blade 10 comprised in this way is rotationally driven, a stirring flow will act with respect to a to-be-stirred object. Therefore, the material to be stirred is stirred and mixed while flowing in the tank body 20 along the stirring flow, so that the material to be stirred can be sufficiently kneaded and dispersed.

  Furthermore, the first blade 12 has an edge portion 12 c that faces the downstream side in the rotation direction A and is tapered toward the downstream side in the rotation direction A. Thus, when the first stirring blade 10 is driven to rotate, the object to be stirred is cut by the edge portion 12c of the first blade 12 formed in a tapered shape. As a result, a high shearing force can be applied to the agitated object flowing along the agitating flow in the tank body 20. In addition, the thickness of the edge part 12c of the 1st braid | blade 12 formed in a taper shape is set to about 1 mm, while thickness except the edge part 12c is set to about 3-12 mm.

  Each of the two second blades 13 is inclined so as to move away from the rotation surface of the base 11 (a virtual plane including the surface of the base 11) toward the other side as going radially outward from the base 11. It is. The second blades 13 are provided symmetrically with respect to the rotation axis.

  The inclination angle θ2 of the second blade 13 with respect to the rotation surface of the base 11 is preferably set to 30 to 50 °. As a result, when the first stirring blade 10 is driven to rotate, a stirring flow can be applied to the stirring target in the tank body 20. Therefore, the material to be stirred is stirred and mixed while flowing in the tank body 20 along the stirring flow, so that the material to be stirred can be sufficiently kneaded and dispersed.

  Further, the second blade 13 is bent at a position inclined inward in the radial direction from the upstream side to the downstream side in the rotation direction A, and continues to the base 11. In other words, the second blade 13 is located at a position where the second upstream base end portion 13a on the upstream side in the rotational direction A is separated radially outward from the second downstream base end portion 13b on the downstream side in the rotational direction A. Bent to the base 11. When the first stirring blade 10 configured as described above is rotationally driven, the material to be stirred is stirred and mixed while flowing in the tank body 20 along the stirring flow. Therefore, the material to be stirred can be sufficiently kneaded and dispersed.

  Further, the second blade 13 has an edge portion 13 c that faces the downstream side in the rotation direction A and is tapered so as to face the downstream side in the rotation direction A. Thus, when the first stirring blade 10 is driven to rotate, the object to be stirred is cut by the edge portion 13c of the second blade 13 formed in a tapered shape. Therefore, a high shearing force can be applied to the object to be stirred that flows along the stirring flow in the tank body 20. In addition, the thickness of the edge part 13c of the 2nd braid | blade 13 formed in a taper shape is set to about 1 mm, while thickness except the edge part 13c is set to about 3-12 mm.

  Each of the two third blades 14 is a blade that extends radially outward from the base 11 and extends along the rotation surface of the base 11 (a virtual plane including the surface of the base 11). The third blades 14 are provided symmetrically with respect to the rotation axis. The third blade 14 has an edge portion 14a that faces the downstream side in the rotation direction A and is tapered so as to face the downstream side in the rotation direction A. Thus, when the first stirring blade 10 is driven to rotate, the object to be stirred is cut by the edge portion 14a of the third blade 14 formed in a tapered shape. Therefore, a high shearing force can be applied to the object to be stirred that flows along the stirring flow in the tank body 20. In addition, the thickness of the edge part 14a of the 3rd braid | blade 14 formed in a taper shape is set to about 1 mm, while thickness except the edge part 14a is set to about 3-12 mm.

  As described above, a total of six blades including the two first blades 12, the two second blades 13, and the two third blades 14 are connected radially outward from the base 11. In the formed first agitating blade 10, the rotation diameter L 4 at the tip of the outermost peripheral edge corresponding to the length between the free ends of the two third blades 14 is relative to the inner diameter of the tank body 20. It is set to 30 to 80%.

  The first stirring blade 10 used when stirring and mixing in the tank body 20 is not limited to the shape of the first stirring blade 10 described above. The first agitating blade 10 described above is formed so that six blades are connected radially outward from the base portion 11. The number of blades of the first agitating blade 10 is preferably 3-10. Sheets, more preferably 4 to 8 sheets.

[Usage example of stirring device]
Below, the usage example of the stirring apparatus 100 is demonstrated concretely.

<First use example>
As a 1st usage example of the stirring apparatus 100 of this embodiment, the usage example at the time of manufacture of the resin varnish which is a manufacture intermediate body of the ink composition for offset printing can be mentioned. The manufacturing method of the resin varnish in the 1st usage example of the stirring apparatus 100 includes a preparation process and a crushing dissolution process. In the charging step, a resin component and an oil component are charged into the internal space of the tank body 20 as an object to be stirred.

  The resin component introduced into the tank body 20 in the preparation process is a solid resin coarsely pulverized into blocks, flakes, or granules so as not to scatter or explode the dust accompanying it. It is about 500 mm. And in a preparation process, it is preferable that the preparation amount of an oil component is 100-180 mass% of the preparation amount of solid resin, and it is especially preferable that it is 120-150 mass%. Thereby, a resin varnish having a viscosity within a suitable range can be obtained.

  Further, in the preparation process, the procedure for charging the solid resin and the oil component into the tank body 20 is not particularly limited, and the solid resin and the oil component may be charged into the tank body 20 at the same time. The solid resin may be charged after the oil component is charged. In addition, after the oil component is charged into the tank body 20, the first stirring blade 10, the second stirring blade 22, and the third stirring blade 15 are rotationally driven so that the solid resin is charged into the tank body 20 under stirring. It may be.

  Next, in the pulverization and dissolution process, which is a subsequent process of the preparation process, the tank body 20 is heated at a predetermined temperature increase rate so that the ultimate temperature is 80 to 200 ° C., preferably 80 to 140 ° C. The stirring blade 10, the second stirring blade 22, and the third stirring blade 15 are driven to rotate, and in particular, the solid resin is pulverized by the first stirring blade 10 and dissolved in the oil component.

  The stirrer 100 of the present embodiment is capable of imparting a shearing force to the agitated material while sufficiently applying a stirring flow to the agitated material, and sufficiently kneading and dispersing the agitated material. Since it is an apparatus that can be used, a sufficient shearing force is applied to the solid resin accommodated in the tank body 20, and the solid resin can be stirred and mixed in the oil component while being pulverized. Therefore, the solid resin can be dissolved in the oil component without stirring and mixing the solid resin and the oil component at a temperature higher than 200 ° C. beyond the softening point of the solid resin. Specifically, the first stirring blade 10, the second stirring blade 22, and the third stirring blade 15 are rotated in a state in which the tank body 20 is heated at a predetermined temperature increase rate so that the ultimate temperature is 80 to 200 ° C. By driving, the solid resin can be dissolved in the oil component while being pulverized.

  Thus, since it can be made to melt | dissolve in an oil component, grind | pulverizing solid resin under the temperature of 200 degrees C or less, the molecular weight reduction of solid resin by transesterification can be suppressed. Therefore, the resin varnish used as the raw material of the ink composition for offset printing which has high printability can be obtained. Moreover, since the solid resin can be dissolved in the oil component at a temperature of 200 ° C. or lower, the heat energy loss can be reduced.

<Specific production example in the first usage example>
Next, specific production examples of the resin varnish, which is a production intermediate of the ink composition for offset printing, in the first usage example of the stirring device 100 will be described in detail, but the present invention is limited to these production examples. Is not to be done. In addition, about the resin varnish, the melt | dissolution state with respect to the oil component of solid resin, the viscosity, the polystyrene conversion molecular weight, and n-hexane tolerance were evaluated.

<Solubility of solid resin in oil component>
The dissolved state of the solid resin in the oil component was evaluated by visually observing the resin varnish. When the solid resin was completely dissolved in the oil component, “◯” was given, and when the solid resin was not completely dissolved and the undissolved residue was visually confirmed, “X” was given.

<Evaluation of viscosity>
The viscosity of the resin varnish was measured as follows. That is, 0.5 cc of the sample was kept at 25 ° C. and measured using an E-type viscometer (TVE-20H, manufactured by Toki Sangyo Co., Ltd.) while appropriately adjusting the rotation speed.

<Evaluation of polystyrene equivalent molecular weight>
The measurement of the polystyrene equivalent molecular weight of the resin varnish was performed as follows. That is, 0.05 g of resin varnish was dissolved in 5 ml of tetrahydrofuran to prepare an analytical sample, and measurement was performed using a GPC analyzer (manufactured by Waters). And the polystyrene conversion molecular weight was calculated | required from the retention time when the peak began to appear. The column mounted on the GPC analyzer was TSKgel G2500HXL, TSKgelGMHXL-L, and TSKgelGMHXL manufactured by Tosoh Corporation.

<Evaluation of n-hexane tolerance>
The n-hexane tolerance of the resin varnish was evaluated as follows. That is, 5 g of resin varnish was weighed into a 100 mL beaker, and n-hexane was added dropwise while stirring with a glass rod under a temperature condition of 25 ° C. Since n-hexane is a poor solvent for the resin varnish, the resin varnish solution gradually becomes cloudy as the dripping amount increases. The point at which the resin varnish solution becomes cloudy to the extent that the letters on the newspaper placed under the beaker cannot be read is the end point, and the mass of n-hexane required to reach the end point is n-hexane tolerance (unit: g / varnish 5 g). It was.

  In the resin varnish, the lower the measured value of n-hexane tolerance, the higher the raw material (manufacturing intermediate) of the ink composition for offset printing having higher printability. Specifically, the ink composition for offset printing produced using a resin varnish showing a low measured value of n-hexane tolerance is one in which the occurrence of ink misting is suppressed during printing, and the tack value is low. Value.

(Production Example 1)
The resin varnish was manufactured using the stirring apparatus 100 shown in FIG. As for the size of the stirring apparatus 100 used in Production Example 1, “W1” is set to 210 mm, and “H1 + H2 + H3 + H4” is set to 350 mm. The stirrer 100 used in Production Example 1 is “W1” of 1800 mm, “W2” of 1150 mm, “H1” of 369 mm, “H2” of 807 mm, “H3” of 1303 mm, With respect to the stirring device in which “H4” is set to 287 mm and “H5” is set to 600 mm, it is 0.117 (210 mm / 1800 mm) times in the direction perpendicular to the central axis S, and 0.127 ( 350 mm / 2766 mm) times the size. In the tank main body 20 of such a stirring apparatus 100, 43 parts by mass of rosin-modified phenol resin having a softening point of 165 ° C. as a solid resin, 6 parts by mass of soybean oil as an oil component, and 51 parts by mass of Nisseki AF7 Solvent, The tank body 20 was charged so that the occupation ratio with respect to the entire internal space was 80%.

  Next, heating of the tank body 20 is started at a temperature increase rate of 8 ° C./min so that the ultimate temperature becomes 200 ° C., and simultaneously with the start of heating, the first stirring blade 10 and the third stirring blade 15 (the rotation diameter L4 is the tank). Each of which is set to 60% with respect to the inner diameter of the main body 20) so that the peripheral speed of the tip at the outermost peripheral edge is 10 m / s. Rotation drive so that the peripheral speed of the tip at the peripheral edge is 1.0 m / s (however, the rotation direction of the second stirring blade 22 is opposite to the rotation direction of the first stirring blade 10 and the third stirring blade 15) And the mixture of the solid resin and the oil component contained in the tank body 20 was stirred and mixed.

  In Production Example 1, the solid resin was completely dissolved in the oil component during the temperature increase before reaching the ultimate temperature (200 ° C.), but stirring and mixing were continued for 60 minutes to obtain a brown transparent resin varnish A1. Obtained.

(Production Example 2)
A brown transparent resin varnish A2 was obtained in the same manner as in Production Example 1 except that the tank body 20 was heated at a temperature increase rate of 8 ° C / min so that the ultimate temperature was 170 ° C. In Production Example 2, the solid resin was completely dissolved in the oil component during the temperature increase before reaching the ultimate temperature (170 ° C.), but stirring and mixing were continued for 60 minutes.

(Production Example 3)
A brown transparent resin varnish A3 was obtained in the same manner as in Production Example 1, except that the tank body 20 was heated at a temperature increase rate of 8 ° C / min so that the ultimate temperature was 140 ° C. In Production Example 3, the solid resin was completely dissolved in the oil component during the temperature increase before reaching the ultimate temperature (140 ° C.), but stirring and mixing were continued for 60 minutes.

(Production Example 4)
A brown transparent resin varnish A4 was obtained in the same manner as in Production Example 1 except that the tank body 20 was heated at a temperature increase rate of 8 ° C / min so that the ultimate temperature was 100 ° C. In Production Example 4, the solid resin was completely dissolved in the oil component during the temperature increase before reaching the ultimate temperature (100 ° C.), but stirring and mixing were continued for 60 minutes.

(Production Example 5)
A transparent brown color is obtained in the same manner as in Production Example 4 except that the rotation diameter L4 of the first stirring blade 10 and the third stirring blade 15 is set to 35% of the inner diameter of the tank body 20 respectively. Resin varnish A5 was obtained. In Production Example 5, the solid resin was completely dissolved in the oil component material during the temperature increase before reaching the ultimate temperature (100 ° C.), but stirring and mixing were continued for 60 minutes.

(Reference Example 1)
In Reference Example 1, a resin varnish was produced without using the stirring device 100. Specifically, in a bottomed cylindrical tank having a height of 250 mm and an inner diameter of 210 mm, 43 parts by mass of rosin-modified phenolic resin having a softening point of 165 ° C. as a solid resin, 6 parts by mass of soybean oil as an oil component material, and Nisseki AF7 solvent 51 parts by mass was charged. The amount charged was the same as in Production Example 1. A conventional cutter blade (disc turbine blade) was installed in the tank.

  Next, heating of the tank was started at a heating rate of 8 ° C./min so that the ultimate temperature was 250 ° C., and simultaneously with the start of heating, the peripheral speed of the tip portion at the outermost peripheral edge was 10 m / s. And the mixture of the solid resin and the oil component contained in the tank was stirred and mixed. In Reference Example 1, the solid resin was completely dissolved in the oil component in the middle of the temperature rise before reaching the ultimate temperature (250 ° C.). However, stirring and mixing were continued for 60 minutes, and a brown transparent resin varnish was obtained. B1 was obtained.

(Reference Example 2)
The mixture of solid resin and oil component was stirred and mixed in the same manner as in Reference Example 1 except that the tank was heated at a heating rate of 8 ° C./min so that the ultimate temperature was 100 ° C. In Reference Example 2, the solid resin was not completely dissolved in the oil component even after 60 minutes of stirring and mixing.

  The evaluation results for the resin varnishes of Production Examples 1 to 5 and Reference Examples 1 and 2 are shown in Table 1. In addition, “-” in Table 1 indicates that the evaluation is not performed.

  As shown in Table 1, the resin varnishes A1 to A5 of Production Examples 1 to 5 are those in which the solid resin is completely dissolved in the oil component in a short dissolution time, and the viscosity is higher than that of the resin varnish B1 of Reference Example 1. It is a high varnish. From this, it can be seen that the resin varnishes A1 to A5 of Production Examples 1 to 5 are those in which the lowering of the molecular weight of the solid resin by the transesterification reaction is suppressed. On the other hand, since the resin varnish B1 of Reference Example 1 was produced at a high temperature of 250 ° C., the molecular weight of the solid resin was lowered due to the transesterification reaction. The resin varnishes A1 to A5 of Production Examples 1 to 5 are varnishes having an n-hexane tolerance value lower than that of the resin varnish B1 of Reference Example 1. From this, it can be seen that the resin varnishes A1 to A5 of Production Examples 1 to 5 are raw materials (production intermediates) of the ink composition for offset printing having high printability.

<Manufacture of ink composition for offset printing>
Although the specific manufacture example of the ink composition for offset printing using the resin varnish manufactured based on the 1st use example is demonstrated in detail, this invention is not limited only to these manufacture examples. . The ink composition for offset printing was evaluated for misting property, facing set-off property, and on-machine stability.

<Evaluation of misting properties>
The misting property of the ink composition for offset printing was evaluated using DIGITAL INKOMETER (manufactured by Toyo Seiki Co., Ltd.) in accordance with JIS K5701 4.2.2. A 2.6 cc sample was weighed and operated at 35 ° C. and 1200 rpm for 3 minutes, and the misting amount at that time was visually evaluated as the amount of ink scattered on a 10 cm × 10 cm sheet laid under the vibration roll. The misting property was evaluated in a thermostatic chamber (temperature: 25 ° C., humidity: 50%). The evaluation criteria for misting properties are as follows.
○: Stain due to ink scattered on the paper is hardly observed, which is good.
(Triangle | delta): The stain | pollution | contamination degree by the ink scattered on the paper is less than the stain | pollution | contamination degree of a predetermined standard sample.
X: The degree of smearing due to the ink scattered on the paper is equivalent to the degree of smearing of a predetermined standard sample, and the effect of suppressing the occurrence of misting is not seen.

<Evaluation of face-to-face set-off>
Evaluation of the facing set-off property of the ink composition for offset printing was performed as follows. First, 0.1 cc of the sample was developed on paper (aurora coat, 73 g of weight, manufactured by Futaba Paper Co., Ltd.) using an RI color developing machine (used roller: 4-split, manufactured by Meiji Seisakusho). Next, each printed matter immediately after the color development was set on a set tester (AUTO INKSETTING TESTER, manufactured by Toyo Seiki Co., Ltd.), a set test was performed at intervals of 2 minutes, and the amount of ink adhered to the coated paper was visually confirmed. The face-off set-off property was evaluated in a temperature-controlled room (temperature: 25 ° C., humidity: 50%). Moreover, the evaluation criteria of face-to-face set-off property are as follows.
○: In a set test at intervals of 2 minutes, ink adhesion to the coated paper is eliminated within 22 minutes from the start of the test.
(Triangle | delta): In the set test of a 2 minute space | interval, the ink adhesion with respect to a coated paper is eliminated 24 minutes or 26 minutes after a test start.
X: In the set test at intervals of 2 minutes, the ink adhesion to the coated paper is eliminated after 28 minutes, 30 minutes or 32 minutes from the start of the test.

<Evaluation of onboard stability>
The on-machine stability of the ink composition for offset printing was evaluated according to JIS K5701 4.2.2 using DIGITAL INKOMETER (manufactured by Toyo Seiki Co., Ltd.). A 0.2 cc sample was weighed and operated at 35 ° C. and 1200 rpm for 3 minutes, and then the tack value was continuously measured for 0 to 20 minutes to evaluate on-machine stability. In addition, in the ink composition for offset printing, it is an ink composition for offset printing which has high printability, so that the measured tack value shows a low value. Specifically, the offset printing ink composition showing a low tack value is one in which the occurrence of a pyring phenomenon during printing is prevented. The piling phenomenon is a phenomenon in which paper fibers are peeled off by ink at the time of printing, and paper dust is deposited on a roller, a printing plate, and a blanket to cause ink transfer failure.

(Production Examples 6 to 10, Reference Example 3)
Ink for offset printing of Production Examples 6 to 10 and Reference Example 3 corresponding to each of the resin varnishes A1 to A5 and B1 using the resin varnishes A1 to A5 of Production Examples 1 to 5 and the resin varnish B1 of Reference Example 1 A composition was prepared.

  Specifically, in 5 parts by mass of each resin varnish A1 to A5, B1, 29.4 parts by mass of phthalocyanine pigment (Lionol Blue FG-7330K, manufactured by Toyo Ink Manufacturing Co., Ltd.) and 5.6 parts by mass of soybean oil And stirred and mixed at 70 ° C. for 30 minutes, and then dispersed with a three-roll mill to obtain a base ink composition for offset printing. Next, to 50 parts by mass of each base ink composition for offset printing, 45 parts by mass of the corresponding resin varnish and 5 parts by mass of Nisseki AF7 No. Solvent are added and mixed by stirring. Production Examples 6 to 10 And the ink composition for offset printing of Reference Example 3 was obtained.

  Table 2 shows the evaluation results of the ink compositions for offset printing of Production Examples 6 to 10 and Reference Example 3.

  As shown in Table 2, the ink compositions for offset printing of Production Examples 6 to 10 are excellent in on-machine stability because the tack value is prevented from becoming too high, and for offset printing in Reference Example 3. Occurrence of misting and face-to-face set-off is prevented compared to the ink composition.

<Second usage example>
As a 2nd usage example of the stirring apparatus 100 of this embodiment, the usage example at the time of manufacture of the ink composition for offset printing can be mentioned. The manufacturing method of the ink composition for offset printing in the 2nd usage example of the stirrer 100 includes a varnish preparation process, a gelation process, a transition process, a dehydration process, and a post-addition process.

  In the varnish preparation step, a resin component and an oil component are charged into the tank body 20, and the tank body 20 is heated at a predetermined temperature increase rate so that the ultimate temperature is 80 to 200 ° C, preferably 80 to 140 ° C. Then, by rotating the first stirring blade 10, the second stirring blade 22, and the third stirring blade 15, the resin component is dissolved in the oil component (the resin component is coarsely pulverized into a block shape, flake shape, or granular shape). In the case of a solid resin, the solid resin is dissolved in an oil component while being pulverized to obtain a resin varnish.

  Next, in the gelation step, the gelling agent is charged into the tank body 20 where the resin varnish obtained in the varnish preparation step is stirred and mixed, and stirred at a temperature of 80 to 150 ° C. for 15 to 120 minutes. The resin component and the gelling agent are mixed and reacted to gel the resin component. The gelling step is preferably performed in view of the ink properties and printability of the offset printing ink composition, but may not be performed.

  Next, in the transfer step, the resin varnish obtained in the varnish preparation step, or if necessary, the tank body 20 in which the resin varnish in which the resin component is gelled in the gelation step is stirred and mixed, A water-containing pigment containing a pigment is charged, and the first stirring blade 10, the second stirring blade 22 and the third stirring blade 15 are rotationally driven and stirred and mixed at a temperature of 50 to 150 ° C. The pigment inside is transferred into the oil component to obtain a pigment dispersion. In addition, since the surface is lipophilic, the pigment moves into the oil component.

  The water-containing pigment contains water and a pigment. As the water-containing pigment, a water-containing pigment commonly used as a pigment component of an offset printing ink composition can be used. The water-containing pigment is obtained by placing the fine pigment primary particles produced by chemically reacting the pigment material components in an aqueous system into a filtering bag or the like for concentration (filter press), or It is produced as a water-containing pigment called a wet cake or press cake, which is obtained by drying using heat or the like after filter pressing. The water content of the water-containing pigment is 30% by mass or more and 95% by mass or less. When a water-containing pigment having a water content of less than 30% by mass is used, the pigment is difficult to be dispersed to fine primary particles. When a water-containing pigment having a water content exceeding 95% by mass is used, it is difficult to obtain a pigment dispersion having a high pigment concentration.

  Next, in the dehydration step, the inside of the tank body 20 is depressurized by the depressurization dehydrating means 30, the first stirring blade 10, the second stirring blade 22 and the third stirring blade 15 are rotationally driven, and the pigment dispersion is heated to 30 to 100 ° C. The mixture is agitated and mixed at a temperature of 1 to dehydrate until the water content of the pigment dispersion is 2 mass% or less. As a result, a dehydrated product is obtained. In addition, since a yellow pigment has big influence on a hue with temperature, when using a yellow pigment, it is preferable to dehydrate at about 30-60 degreeC.

  The pigment dispersion in the tank body 20 in the dehydration step is dehydrated under conditions of a pressure of 31.8 to 760 mmHg at which the temperature is about 30 to 100 ° C. When using a pigment susceptible to heat, for example, a water-containing pigment containing a yellow pigment, dehydration of the pigment dispersion in the tank body 20 in the dehydration step is performed at a pressure of 31.8 to about 30 to 60 ° C. It is preferable to carry out under the condition of 149 mmHg.

  Next, in the post-addition step, an oil component, an additive, an extender pigment, and the like are added to the dehydrated product obtained in the dehydration step, followed by stirring and mixing, whereby an ink composition for offset printing can be obtained.

<Specific production example in the second usage example>
Below, although the specific example of manufacture of the ink composition for offset printing in the 2nd usage example of the stirring apparatus 100 is demonstrated in detail, this invention is not limited only to these examples of manufacture. The ink composition for offset printing was evaluated for residue rate, water content, Raleigh viscosity, tack value, coloring power, and printability.

<Residue rate>
While adding 100 g of a solvent (kerosene: toluene = 1: 1) dropwise to 50 g of a pigment dispersion obtained during the production of the ink composition for offset printing, the mixture was stirred using a glass rod. This was filtered using a metal mesh having a mesh size of 400, and the material remaining on the metal mesh was collected and dried in an oven at 60 ° C. for one day. The ratio of the weight of the recovered substance after drying to the weight of the pigment contained in 50 g of the pigment dispersion was determined as the residue rate.

<Moisture content>
The moisture content (% by mass) was measured using a Karl Fischer moisture meter measurement method. As measurement conditions, 1.0 g of the pigment dispersion was used and measurement was performed at a temperature of 25 ° C.

<Raleigh viscosity>
Raleigh viscosity (Pa · s / 25 ° C) was measured using TE851 manufactured by Kenwood TMI Co., Ltd.

<Tack value>
The tack value was measured with a DIGITAL INKOMETER manufactured by Toyo Seiki Co., Ltd. for 1 minute at a rotation speed of 400 rpm under the condition of 30 ° C.

<Coloring power>
The white offset printing ink composition was colored with the offset printing ink composition of Production Example 11 and Reference Example 4 to be described later. For Production Example 11, the coloring power of Reference Example 4 was set to “100”, and relative evaluation was performed. did. The higher the relative evaluation value, the more excellent the coloring power.

<Printability>
The printability (change in density) of the ink composition for offset printing was examined by actually printing with a DAIYA IE type printer manufactured by Mitsubishi Heavy Industries, Ltd. The printability was printed with the dampening water supply dial set to 35% and 60%, and the production example 11 described later was evaluated based on the change in print density with reference example 4 as a reference (good). The printing conditions are as follows.
・ Dampening water: Cipher TP-3 (dampening water concentration 1%, manufactured by Sakata Inx Corporation)
-Printing speed: 4500 sheets / hour-Humidity / temperature: 25 ° C / 60%
・ Printing paper: Aurora coated paper (manufactured by Nippon Paper Industries Co., Ltd.)

(Production Example 11)
The ink composition for offset printing was manufactured using the stirring apparatus 100 shown in FIG. The size of the stirring device 100 used in Production Example 11 is 1800 mm for “W1”, 1150 mm for “W2”, 369 mm for “H1”, 807 mm for “H2”, 1303 mm for “H3”, 287 mm for “H4”, “H5” is set to 600 mm.

[Varnish preparation process]
In the tank body 20 of the stirrer 100, 2.7 parts by weight of linseed oil, 17.3 parts by weight of soybean oil, 5.4 parts by weight of soybean oil fatty acid butyl ester, AF-7 petroleum solvent (Shin Nippon Oil Co., Ltd.) 15.2 parts by mass of the company), rosin-modified phenol resin in a lump state (trade name: OR-357, manufactured by Seiko Polymer Co., Ltd., 27.6 parts by mass) as a resin component, a liquid having a basic skeleton composed of isophthalic acid 0.57 parts by mass of soybean oil-modified alkyd resin (acid value 9 KOH / g) was charged. Then, with the temperature of the tank body 20 maintained at 200 ° C., the first stirring blade 10 and the third stirring blade 15 (the rotation diameter L4 is set to 35% with respect to the inner diameter of the tank body 20). The second stirring blade 22 is rotationally driven so that the peripheral speed of the tip portion at the outermost peripheral edge portion is 13 m / s (540 rpm), and the peripheral speed of the tip portion at the outermost peripheral edge portion is 1.0 m / s. (10 rpm) is driven to rotate (however, the rotation direction of the second stirring blade 22 is opposite to the rotation direction of the first stirring blade 10 and the third stirring blade 15) and accommodated in the tank body 20 The stored contents were stirred for 30 minutes to dissolve the rosin-modified phenolic resin in a lump state.

[Gelification process]
Next, 0.58 parts by mass of aluminum chelate was added as a gelling agent in the tank body 20 and reacted at 130 ° C. for 30 minutes to obtain a resin varnish.

[Transition process]
Next, 39.6 parts by mass of press cake pigment (Pigment Yellow 174, solid content 27% by mass) was added to the tank body 20. In Production Example 11, each raw material was charged into the tank body 20 so that the occupation ratio with respect to the entire internal space of the tank body 20 was 80% when the press cake pigment was added into the tank body 20 in the transition process. . And the peripheral speed of the front-end | tip part in an outermost peripheral part becomes 19.4 m / s (800 rpm) of the 1st stirring blade 10 and the 3rd stirring blade 15 in the state which kept the temperature of the tank main body 20 at 70 degreeC. The second agitating blade 22 is rotationally driven so that the peripheral speed of the tip at the outermost peripheral edge is 1.0 m / s (10 rpm) (however, the rotation direction of the second agitating blade 22) Is the direction opposite to the rotation direction of the first stirring blade 10 and the third stirring blade 15), and flushing is performed for 30 minutes, and the pigment in the presscake pigment is transferred into the resin varnish that is an oil component. A dispersion was obtained.

[Dehydration process]
Next, the inside of the tank body 20 is decompressed to 130 mmHg by the vacuum dehydrating means 30, and the peripheral speed of the first stirring blade 10 and the third stirring blade 15 at the outermost peripheral edge is 19.4 m / s (800 rpm). The second agitating blade 22 is rotationally driven so that the peripheral speed of the tip portion at the outermost peripheral edge is 1.0 m / s (10 rpm) (however, the second agitating blade 22 is rotated). Direction is opposite to the rotation direction of the first stirring blade 10 and the third stirring blade 15), and the pigment dispersion is stirred and mixed at a temperature of 57 ° C., whereby the water content of the pigment dispersion is 2 It dehydrated until it became below mass%, and the dehydrated matter was obtained.

[Post-addition process]
Next, 15 parts by mass of soybean oil and 5 parts by mass of AF-7 petroleum solvent (manufactured by Nippon Oil Corporation) are added to the dehydrated product in the tank body 20, and the first stirring blade 10 and the third stirring blade 15 are added. Each of the second stirring blades 22 is rotationally driven so that the peripheral speed of the tip at the outermost peripheral edge is 19.4 m / s (800 rpm), and the peripheral speed of the tip of the outermost peripheral edge is 1.0 m / s. s (10 rpm) is driven to rotate (however, the rotation direction of the second stirring blade 22 is opposite to the rotation direction of the first stirring blade 10 and the third stirring blade 15) and stirred for 10 minutes. Thus, an ink composition for offset printing was obtained.

(Reference Example 4)
In Reference Example 4, an ink composition for offset printing was produced without using the stirring device 100. In Reference Example 4, using a stirrer in which a conventional cutter blade (disc turbine blade) is installed in a bottomed cylindrical tank having a height of 1500 mm and an inner diameter of 1800 mm, a “varnish preparation step” and a “gelation step” In the subsequent “flushing step and vacuum dehydration step”, the resin varnish obtained by the stirring device was transferred to a production flasher to produce an ink composition for offset printing.

[Varnish preparation process]
In the tank, as oil components, 2.7 parts by weight of linseed oil, 17.3 parts by weight of soybean oil, 5.4 parts by weight of soybean oil fatty acid butyl ester, AF-7 petroleum solvent (manufactured by Nippon Oil Corporation) 15. 2 parts by mass, 27.6 parts by mass of rosin-modified phenolic resin (trade name: OR-357, manufactured by Seiko Polymer Co., Ltd.) as a resin component, liquid soybean oil-modified alkyd resin having a basic skeleton made of isophthalic acid (Acid value 9 KOH / g) 0.57 parts by mass was charged. Then, with the temperature of the tank held at 200 ° C., the disk turbine blades are rotationally driven so that the peripheral speed of the tip portion at the outermost peripheral edge portion is 13 m / s, and the contents accommodated in the tank are The mixture was stirred for 40 minutes to dissolve the rosin-modified phenol resin in a lump state.

[Gelification process]
Next, 0.58 parts by mass of aluminum chelate as a gelling agent was added to the tank and reacted at 130 ° C. for 30 minutes to obtain a resin varnish.

[Flushing process and vacuum dehydration process]
To the production flasher (Inoue Machinery Co., Ltd.), 39.6 parts by mass of the resin varnish and press cake pigment (Pigment Yellow 174, solid content 27% by mass) obtained in the gelation step were added at 120 ° C. Flushing was performed for a minute to obtain a pigment dispersion. Then, the leached water is removed by tilting the main body, and further, the inside of the tank is depressurized (pressure in the tank: 130 mmHg) to dehydrate the water content to 2% by mass or less to obtain a dehydrated product. It was.

[Post-addition process]
Next, 15 parts by mass of soybean oil and 5 parts by mass of AF-7 petroleum solvent (manufactured by Shin Nippon Oil Co., Ltd.) are added to the dehydrated product in the production flasher and mixed for 10 minutes. The ink composition for offset printing of Reference Example 4 I got a thing.

  Table 3 shows the evaluation results of the offset printing ink compositions of Production Example 11 and Reference Example 4.

  As shown in Table 3, Production Example 11 makes it possible to obtain a final offset printing ink composition with one agitator 100, and the offset printing ink composition of Production Example 11 is shown in Reference Example 4. On the other hand, the ink characteristics such as the residue ratio, Raleigh viscosity, tack value, coloring power, and printability are maintained in a high state.

<Third use example>
As a 3rd usage example of the stirring apparatus 100 of this embodiment, the usage example at the time of manufacture of the ink composition for offset printing can be mentioned. The manufacturing method of the ink composition for offset printing in the 3rd usage example of the stirring apparatus 100 contains a transfer process, a pigment dispersion preparation process, a gelatinization process, and a post-addition process.

  In the transition step, the oil component is charged into the tank body 20 and heated to 100 ° C. to 180 ° C., preferably 130 ° C., and then the oil component is stirred and mixed at a temperature of 100 ° C. to 180 ° C. A water-containing pigment containing water and a pigment is put into the main body 20, and the first stirring blade 10, the second stirring blade 22 and the third stirring blade 15 are rotationally driven to stir at a temperature of 50 to 150 ° C. By mixing, the pigment in the water-containing pigment is transferred to the oil component to obtain a wetted pigment oil component. In addition, since the surface is lipophilic, the pigment moves into the oil component.

  The usage-amount of the oil component with respect to a water-containing pigment is 50-400 mass parts with respect to 100 mass parts of pigments in a water-containing pigment, Preferably it is 100-400 mass parts. The water-containing pigment contains water and a pigment. As the water-containing pigment, a water-containing pigment commonly used as a pigment component of an offset printing ink composition can be used.

  The water-containing pigment is obtained by placing the fine pigment primary particles produced by chemically reacting the pigment material components in an aqueous system into a filtering bag or the like for concentration (filter press), or It is produced as a water-containing pigment called a wet cake or press cake, which is obtained by drying using heat or the like after filter pressing. The water content of the water-containing pigment is 30% by mass or more and 95% by mass or less. When a water-containing pigment having a water content of less than 30% by mass is used, the pigment is difficult to be dispersed to fine primary particles. When a water-containing pigment having a water content exceeding 95% by mass is used, it is difficult to obtain a pigment dispersion having a high pigment concentration.

  Next, the pigment dispersion production step is a step of producing a pigment dispersion by dehydrating the pigment oil component wet material obtained in the transfer step and dissolving the resin component in the oil component. The pigment dispersion preparation step includes a resin component addition step, a dehydration step, and a resin component dissolution step.

  In the resin component addition step, the resin component is charged into the tank body 20 in which the pigment oil component wet product obtained in the transfer step is stirred and mixed to obtain a resin component mixture. Although the usage-amount of a resin component changes with kinds etc. of a pigment, 30-300 mass parts is preferable with respect to 100 mass parts of pigments in a water-containing pigment.

  Next, in the dehydration step, the inside of the tank body 20 is depressurized by the depressurization dehydrating means 30, the first stirring blade 10, the second stirring blade 22 and the third stirring blade 15 are rotationally driven, and the resin component mixture is added to 30-100. When the resin component is a solid resin coarsely pulverized into a block, flake or granular form by stirring and mixing at a temperature of ℃, the solid resin is pulverized and the water content of the resin component mixture is 2% by mass or less. Dehydrate until. As a result, a dehydrated product is obtained. In addition, since a yellow pigment has big influence on a hue with temperature, when using a yellow pigment, it is preferable to dehydrate at about 30-60 degreeC.

  The resin component mixture in the tank body 20 in the dehydration step is dehydrated under conditions of a pressure of 31.8 to 760 mmHg at which the temperature is about 30 to 100 ° C. In the case of using a pigment susceptible to heat, for example, a water-containing pigment containing a yellow pigment, the dehydration of the resin component mixture in the tank body 20 in the dehydration step is performed at a pressure of 31.8 to about 30 to 60 ° C. It is preferable to carry out under the condition of 149 mmHg.

  Next, in the resin component dissolution step, the first stirring blade 10, the second stirring blade 22, and the third stirring blade 15 are driven to rotate, and the dehydrated material is preferably 80 to 200 ° C, more preferably 80 to 150 ° C. By stirring and mixing at a temperature for 15 to 120 minutes, the resin component is dissolved in the oil component to obtain a pigment dispersion. By stirring and mixing at a temperature of 80 to 200 ° C., it is possible to prevent the transesterification reaction between the resin component and the oil component, and to suppress the lowering of the molecular weight of the resin component, and for a short time. Thus, a pigment dispersion in which the resin component is dissolved in the oil component can be obtained.

  Next, in the gelation step, the gelling agent is charged into the tank body 20 in which the pigment dispersion obtained in the pigment dispersion preparation step is stirred and mixed, and the temperature is 80 to 150 ° C. The mixture is stirred for 120 minutes, and the resin component and the gelling agent are reacted to gel the resin component. The gelling step is preferably performed in view of the ink properties and printability of the offset printing ink composition, but may not be performed.

  Next, in the post-addition step, an oil component, an additive, an extender pigment, or the like is added to the pigment dispersion obtained in the pigment dispersion preparation step, and the mixture is stirred and mixed to obtain an offset printing ink composition. It is. In addition, after the dehydration step and before the resin component dissolution step, the pigment dispersion preparation step is performed by adding oil components and additives so that the final offset printing ink composition is blended. The later pigment dispersion can be used as it is as an ink composition for offset printing.

<Specific production example in the third usage example>
Below, although the specific manufacture example of the ink composition for offset printing in the 3rd usage example of the stirring apparatus 100 is demonstrated in detail, this invention is not limited only to these manufacture examples. The ink composition for offset printing was evaluated for residue rate, water content, Raleigh viscosity, tack value, coloring power, and printability. These evaluations followed the method described above. However, for the evaluation of the coloring power, the yellow offset printing ink compositions of Production Examples 12 and 15 were evaluated relative to each other with the coloring power of Reference Example 5 being “100”, and the red offset printing ink composition of Production Example 13 was used. For the product, the coloring power of Reference Example 6 was relatively evaluated as “100”, and for the indigo ink composition for offset printing of Production Example 14, the coloring power of Reference Example 7 was relatively evaluated as “100”.

(Production Example 12)
The ink composition for offset printing was manufactured using the stirring apparatus 100 shown in FIG. As for the size of the stirring apparatus 100 used in Production Example 12, “W1” is set to 210 mm, and “H1 + H2 + H3 + H4” is set to 350 mm. The stirring device 100 used in Production Example 12 is “W1” of 1800 mm, “W2” of 1150 mm, “H1” of 369 mm, “H2” of 807 mm, “H3” of 1303 mm, With respect to the stirring device in which “H4” is set to 287 mm and “H5” is set to 600 mm, it is 0.117 (210 mm / 1800 mm) times in the direction perpendicular to the central axis S, and 0.127 ( 350 mm / 2766 mm) times the size.

[Transition process]
In the tank body 20 of the agitator 100, as oil components, 3 parts by weight of linseed oil, 10 parts by weight of soybean oil, 10 parts by weight of soybean oil fatty acid butyl ester, and 10 parts by weight of AF-7 petroleum solvent (manufactured by Nippon Oil Corporation) Then, the temperature was raised to 130 ° C., and 56.7 parts by mass of a hydrous pigment (Pigment Yellow 174 in a press cake state, 30% solid content) was added. Then, with the temperature of the tank body 20 held at 60 ° C., the first stirring blade 10 and the third stirring blade 15 (the rotation diameter L4 is set to 52% with respect to the inner diameter of the tank body 20). The second stirring blade 22 is rotated and driven so that the peripheral speed of the tip at the outermost peripheral edge is 13 m / s (536 rpm), and the peripheral speed of the tip at the outermost peripheral edge is 1.0 m / s. (10 rpm) is driven to rotate (however, the rotation direction of the second stirring blade 22 is opposite to the rotation direction of the first stirring blade 10 and the third stirring blade 15) and accommodated in the tank body 20 The container was stirred for 10 minutes to obtain a wet pigment oil component.

[Pigment dispersion preparation process]
33 parts by mass of a rosin-modified phenolic resin (manufactured by Seiko Polymer Co., Ltd., trade name: OR-357) in a lump state is added to the wet pigment oil component, and the pressure inside the tank body 20 is reduced (pressure in the tank: 92.5 mmHg). (0.12 atm)), and the first stirring blade 10 and the third stirring blade 15 are respectively driven to rotate so that the peripheral speed of the tip portion at the outermost peripheral edge portion is 13 m / s (536 rpm). 2 The agitating blade 22 is rotationally driven so that the peripheral speed of the tip at the outermost peripheral edge is 1.0 m / s (10 rpm) (however, the rotation direction of the second agitating blade 22 is the same as that of the first agitating blade 10 and The direction of rotation of the third agitating blade 15 is opposite), and dehydrated at a temperature of 50 ° C. for 65 minutes until the water content becomes 2% by mass or less while pulverizing the lump rosin-modified phenol resin. Dehydrated It was. Further, the first agitating blade 10, the second agitating blade 22 and the third agitating blade 15 are continuously driven to rotate, and the dehydrated product is stirred and mixed at a temperature of 130 ° C. for 32 minutes to contain the pulverized rosin-modified phenol resin. The resin component was dissolved in the oil component.

[Gelification process]
Next, 1 part by mass of an aluminum chelate was added as a gelling agent in the tank body 20 after the pigment dispersion preparation step and reacted at 130 ° C. for 24 minutes to obtain a yellow pigment dispersion.

[Post-addition process]
Subsequently, 13.07 parts by mass of soybean oil and 13.07 parts by mass of AF-7 petroleum solvent (manufactured by Nippon Oil Corporation) are added to the yellow pigment dispersion in the tank body 20, and the first stirring blade 10 and The third stirring blade 15 is rotationally driven so that the peripheral speed of the tip portion at the outermost peripheral edge portion is 13 m / s (536 rpm), and the second stirring blade 22 is rotated at the peripheral speed of the tip portion at the outermost peripheral edge portion. Is driven so as to be 1.0 m / s (10 rpm) (however, the rotation direction of the second stirring blade 22 is opposite to the rotation direction of the first stirring blade 10 and the third stirring blade 15). The mixture was stirred and mixed for 8 minutes to obtain an ink composition for offset printing.

(Production Example 13)
A red offset printing ink composition of Production Example 13 was obtained in the same manner as in Production Example 12 except that the pigment was changed to Pigment Red 57: 1.

(Production Example 14)
A deep blue ink composition for offset printing of Production Example 14 was obtained in the same manner as in Production Example 12 except that the pigment was changed to Pigment Blue 15: 3.

(Production Example 15)
A yellow offset printing ink composition of Production Example 15 was obtained in the same manner as in Production Example 12 except that the pigment dispersion preparation step was changed as follows.

[Pigment dispersion preparation process]
The tank body 20 in which the pigment oil component wet substance is accommodated is depressurized (pressure in the tank: 92.5 mmHg), and the first stirring blade 10 and the third stirring blade 15 are placed at the tip of the outermost peripheral portion. The second stirring blade 22 is rotated and driven so that the peripheral speed is 13 m / s (536 rpm), and the second stirring blade 22 is rotated so that the peripheral speed of the tip at the outermost peripheral edge is 1.0 m / s (10 rpm). (However, the rotation direction of the second stirring blade 22 is opposite to the rotation direction of the first stirring blade 10 and the third stirring blade 15), and the water content becomes 2% by mass or less at a temperature of 50 ° C. Until 65 minutes until dehydration was obtained. Then, 33 parts by mass of rosin-modified phenolic resin (trade name: OR-357, manufactured by Seiko Polymer Co., Ltd.) in a lump state is added to the tank body 20, and the first stirring blade 10, the second stirring blade 22, and the third stirring blade are added. The resin component containing the pulverized rosin-modified phenol resin is converted into the oil component while pulverizing the lump-shaped rosin-modified phenol resin by continuously stirring and mixing the blade 15 at a temperature of 130 ° C. for 32 minutes. Dissolved in.

(Reference Example 5)
In Reference Example 5, an ink composition for offset printing was produced without using the stirring device 100. In Reference Example 5, using a stirrer in which a conventional cutter blade (disc turbine blade) is installed in a bottomed cylindrical tank having a height of 250 mm and an inner diameter of 210 mm, a “varnish preparation step” and a “gelation step” In the subsequent “flushing step and vacuum dehydration step”, the resin varnish obtained by the stirring device was transferred to a desktop flasher to produce an ink composition for offset printing.

[Varnish preparation process]
In the tank, as oil components, 3 parts by weight of linseed oil, 10 parts by weight of soybean oil, 10 parts by weight of soybean oil fatty acid butyl ester, 10 parts by weight of AF-7 petroleum solvent (manufactured by Nippon Oil Corporation), as a resin component, 33 parts by mass of rosin-modified phenolic resin (trade name: OR-357, manufactured by Seiko Polymer Co., Ltd.) in a lump state was charged. Then, with the temperature of the tank held at 200 ° C., the disk turbine blades are rotationally driven so that the peripheral speed of the tip portion at the outermost peripheral edge portion is 13 m / s, and the contents accommodated in the tank are The mixture was stirred for 40 minutes to dissolve the rosin-modified phenol resin in a lump state.

[Gelification process]
Next, 1 part by mass of aluminum chelate was added as a gelling agent in the tank and reacted at 130 ° C. for 30 minutes to obtain a resin varnish.

[Flushing process and vacuum dehydration process]
To a tabletop flasher (manufactured by Inoue Kikai Co., Ltd.) was added 56.7 parts by mass of the resin varnish in the tank obtained in the gelation step and a hydrated pigment (Pigment Yellow 174 in a press cake state, solid content 30%). Flushing was performed at 60 ° C. for 30 minutes. Then, the leached water is removed by tilting the main body, and further, the inside of the tank is depressurized (pressure in the tank: 92.5 mmHg) to dehydrate until the water content becomes 2% by mass or less. A pigment dispersion was obtained.

[Post-addition process]
Next, 13.07 parts by mass of soybean oil and 13.07 parts by mass of AF-7 petroleum solvent (manufactured by Nippon Oil Corporation) were added to the yellow pigment dispersion, mixed for 10 minutes, and offset of Reference Example 5 A printing ink composition was obtained.

(Reference Example 6)
A red offset printing ink composition of Reference Example 6 was obtained in the same manner as in Reference Example 5 except that the pigment was changed to Pigment Red 57: 1.

(Reference Example 7)
A deep blue ink composition for offset printing of Reference Example 7 was obtained in the same manner as Reference Example 5 except that the pigment was changed to Pigment Blue 15: 3.

  Table 4 shows the evaluation results for the offset printing ink compositions of Production Examples 12 to 15, and Table 5 shows the evaluation results for the offset printing ink compositions of Reference Examples 5 to 7.

  As shown in Tables 4 and 5, in Production Examples 12 to 15, it is possible to obtain a final ink composition for offset printing with one stirring device 100, ink characteristics such as tack value and coloring power, and printing. It can be seen that the total time required for the production was shortened compared to Reference Examples 5 to 7 while the suitability was maintained high.

<Fourth usage example>
As a 4th usage example of the stirring apparatus 100 of this embodiment, the usage example at the time of manufacture of the ink composition for offset printing can be mentioned. The manufacturing method of the ink composition for offset printing in the 4th usage example of the stirring apparatus 100 contains a wetting process, a transfer process, a pigment dispersion preparation process, a gelation process, and a post-addition process.

  The wetting step is a pigment water dispersion step performed using the stirring device 100. Water and a dried pigment are charged into the tank body 20, and the first stirring blade 10, the second stirring blade 22, and the third stirring blade. 15 is driven to rotate, and the mixture is stirred and mixed at a temperature of 20 to 100 ° C. for about 3 to 30 minutes, whereby the pigment is wetted with water to obtain a wet pigmented water dispersion. The amount of water used for the pigment is preferably 30 to 250 parts by mass with respect to 100 parts by mass of the pigment. However, in order to shorten the subsequent dehydration step, the amount of water used is preferably as small as possible. Further, in the wetting step, in addition to water and the dried pigment, a pigment dispersant, a surface treatment agent, a surfactant and the like may be added.

  Next, the transition step is a step performed using the stirring device 100, and the oil component is put into the tank body 20 in which the pigment water wet matter obtained in the wetting step is stirred and mixed, and the first stirring is performed. The blade 10, the second stirring blade 22, and the third stirring blade 15 are rotationally driven, and the pigment water wet product and the oil component are preferably stirred and mixed at a temperature of 20 to 100 ° C. for about 3 to 30 minutes. By transferring the pigment dispersed in water into the oil component, a wetted pigment oil component is obtained. Although the usage-amount of the oil component with respect to a pigment changes with kinds etc. of a pigment, 50-400 mass parts is preferable with respect to 100 mass parts of pigments.

  Next, the pigment dispersion preparation step is a step performed using the stirring device 100, and the pigment oil component wet matter obtained in the transfer step is dehydrated, and the resin component is dissolved in the oil component to obtain the pigment dispersion. It is a process of producing. In the present embodiment, the pigment dispersion preparation step includes a resin component addition step, a dehydration step, and a resin component dissolution step.

  In the resin component addition step, the resin component is charged into the tank body 20 in which the pigment oil component wet product obtained in the transfer step is stirred and mixed to obtain a resin component mixture. Although the usage-amount of a resin component changes with kinds etc. of a pigment, 30-300 mass parts is preferable with respect to 100 mass parts of pigments.

  In the dehydration step, the inside of the tank main body 20 is depressurized by the depressurization dehydrating means 30, the first stirring blade 10, the second stirring blade 22 and the third stirring blade 15 are rotationally driven, and the resin component mixture is heated to a temperature of 65 to 100 ° C. When the resin component is a solid resin coarsely pulverized into a block shape, flake shape or granular shape by stirring and mixing under the above, the solid resin is pulverized and the water content of the resin component mixture is 2 mass% or less. Dehydrate. As a result, a dehydrated product is obtained. In addition, since a yellow pigment has big influence on a hue with temperature, when using a yellow pigment, it is preferable to dehydrate at about 30-60 degreeC. The resin component mixture in the tank body 20 in the dehydration step is dehydrated under conditions of a pressure of 31.8 to 760 mmHg at which the temperature is about 30 to 100 ° C. In the case of using a pigment susceptible to heat, for example, a water-containing pigment containing a yellow pigment, the dehydration of the resin component mixture in the tank body 20 in the dehydration step is performed at a pressure of 31.8 to about 30 to 60 ° C. It is preferable to carry out under the condition of 149 mmHg.

  In the resin component dissolution step, the first stirring blade 10, the second stirring blade 22, and the third stirring blade 15 are rotationally driven, and the dehydrated product is preferably at a temperature of 80 to 200 ° C, more preferably 80 to 150 ° C. By stirring and mixing for 15 to 120 minutes, the resin component is dissolved in the oil component to obtain a pigment dispersion. By stirring and mixing at a temperature of 80 to 200 ° C., it is possible to prevent the transesterification reaction between the resin component and the oil component, and to suppress the lowering of the molecular weight of the resin component, and for a short time. Thus, a pigment dispersion in which the resin component is dissolved in the oil component can be obtained.

  Next, in the gelation step, the gelling agent is charged into the tank body 20 in which the pigment dispersion obtained in the pigment dispersion preparation step is stirred and mixed, and the temperature is 80 to 150 ° C. The mixture is stirred for 120 minutes, and the resin component and the gelling agent are reacted to gel the resin component. The gelling step is preferably performed in view of the ink properties and printability of the offset printing ink composition, but may not be performed.

  Next, in the post-addition step, the pigment dispersion obtained in the resin component dissolution step or the pigment dispersion in which the resin component is gelled in the gelation step as necessary is stirred and mixed in the tank body 20 An ink composition for offset printing can be obtained by adding oil components, additives, extender pigments, and the like to the mixture and stirring and mixing them. In this way, the final ink composition for offset printing can be obtained with one stirring device 100.

<Fifth usage example>
As a 5th usage example of the stirring apparatus 100 of this embodiment, the usage example at the time of manufacture of the ink composition for offset printing can be mentioned. The manufacturing method of the ink composition for offset printing in the 5th usage example of the stirrer 100 includes a wetting step, a pigment dispersion producing step, a gelling step, and a post-adding step.

  The wetting step is a step performed using the stirring device 100, and the oil component and the dried pigment are charged into the tank body 20, and the first stirring blade 10, the second stirring blade 22, and the third stirring blade 15 are placed. The pigment is wetted with the oil component by rotating and driving, and stirring and mixing at a temperature of 20 to 150 ° C. for about 5 to 120 minutes to obtain a wet pigment. The usage-amount of the oil component with respect to a pigment is 50-400 mass parts with respect to 100 mass parts of pigments, Preferably it is 100-400 mass parts. Further, in the wetting step, in addition to the oil component and the dried pigment, a pigment dispersant, a surface treatment agent, a surfactant and the like may be added.

  Next, the pigment dispersion preparation step is a step performed using the stirring device 100, and the resin component is put into the tank body 20 in which the pigment wet product obtained in the wetting step is stirred and mixed. The first stirring blade 10, the second stirring blade 22, and the third stirring blade 15 are rotationally driven, and the pigment wet product and the resin component are preferably at a temperature of 80 to 200 ° C, more preferably 80 to 150 ° C. The resin component is dissolved in the oil component by stirring and mixing for 15 to 120 minutes (in the case of a solid resin coarsely pulverized into a block, flake or granule, the resin component is pulverized into the oil component while pulverizing the solid resin. Dissolution) to obtain a pigment dispersion. By stirring and mixing at a temperature of 80 to 200 ° C., it is possible to prevent the transesterification reaction between the resin component and the oil component, and to suppress the lowering of the molecular weight of the resin component, and for a short time. Thus, a pigment dispersion in which the resin component is dissolved in the oil component can be obtained. In the pigment dispersion preparation step, the heat energy generated by the stirring and mixing in the above-described wetting step can be used for dissolving the resin component in the oil component.

  Next, in the gelation step, the gelling agent is charged into the tank body 20 in which the pigment dispersion obtained in the pigment dispersion preparation step is stirred and mixed, and the temperature is 80 to 150 ° C. The mixture is stirred for 120 minutes, and the resin component and the gelling agent are reacted to gel the resin component. The gelling step is preferably performed in view of the ink properties and printability of the offset printing ink composition, but may not be performed.

  Next, in the post-addition step, the tank body 20 in which the pigment dispersion obtained in the pigment dispersion preparation step or the pigment dispersion in which the resin component is gelled in the gelation step as needed is stirred and mixed. An ink composition for offset printing can be obtained by adding an oil component, an additive, an extender pigment, and the like, and stirring and mixing. In this way, the final ink composition for offset printing can be obtained with one stirring device 100.

<Sixth usage example>
As a 6th usage example of the stirring apparatus 100 of this embodiment, the usage example at the time of manufacture of the ink composition for offset printing can be mentioned. The manufacturing method of the ink composition for offset printing in the 6th usage example of the stirring apparatus 100 is performed using the manufacturing system shown in FIG. 3, FIG. FIG. 3 is a diagram illustrating a configuration of the manufacturing system 1. The manufacturing system 1 is a system in which the stirring device 100 and the dispersion device 110 according to the present embodiment are connected via a supply device 120. FIG. 4 is a diagram showing a configuration of the manufacturing system 2. The manufacturing system 2 is a system in which the stirring device 100 and the dispersion device 110 of the present embodiment are not connected, and each device is arranged independently.

  The manufacturing system 2 is the same as the manufacturing system 1 except that the stirring device 100 and the dispersion device 110 are not connected. Therefore, below, the method of manufacturing the ink composition for offset printing using the manufacturing system 1 is demonstrated, and description about the method of manufacturing the ink composition for offset printing using the manufacturing system 2 is abbreviate | omitted.

  As the dispersing device 110, for example, a three-roll mill or a bead mill (pass method) can be used. In this embodiment, a bead mill is used. As the bead mill, bead mills such as ceramic beads such as zirconia beads having a diameter of 0.2 to 3 mm, dyno mills using steel beads and the like as grinding media, and DCP mills can be used. The supply device 120 is a pump, a screw extruder, or the like, and the object to be stirred discharged from the tank discharge opening 23 of the tank body 20 provided in the stirring device 100 is dispersedly supplied by the dispersion device 110. Liquid is fed toward the opening 111.

  The manufacturing method of the ink composition for offset printing in the 6th usage example of the stirrer 100 includes a wetting step, a pigment mixture preparation step, a gelation step, a kneading step, and a post-addition step.

  The wetting step is a step performed using the stirring device 100, and the oil component and the dried pigment are charged into the tank body 20, and the first stirring blade 10, the second stirring blade 22, and the third stirring blade 15 are placed. The pigment is wetted with the oil component by rotating and driving, and stirring and mixing at a temperature of 20 to 150 ° C. for about 5 to 120 minutes to obtain a wet pigment. The usage-amount of the oil component with respect to a pigment is 50-400 mass parts with respect to 100 mass parts of pigments, Preferably it is 100-400 mass parts. Further, in the wetting step, in addition to the oil component and the dried pigment, a pigment dispersant, a surface treatment agent, a surfactant and the like may be added.

  Next, the pigment mixture preparation step is a step performed using the stirrer 100. The resin component is charged into the tank body 20 in which the pigment wet product obtained in the wet step is stirred and mixed. The stirring blade 10, the second stirring blade 22, and the third stirring blade 15 are rotationally driven, and the pigment wet product and the resin component are preferably heated at a temperature of 80 to 200 ° C, more preferably 80 to 150 ° C. The resin component is dissolved in the oil component by stirring and mixing for ~ 120 minutes (in the case of a solid resin coarsely pulverized into block, flakes or granules, the resin component is pulverized into the oil component while crushing the solid resin. Dissolution) to obtain a pigment mixture. By stirring and mixing at a temperature of 80 to 200 ° C., it is possible to prevent the transesterification reaction between the resin component and the oil component, and to suppress the lowering of the molecular weight of the resin component, and for a short time. Thus, a pigment mixture in which the resin component is dissolved in the oil component can be obtained. In the pigment mixture preparation step, the heat energy generated by the stirring and mixing in the above-described wetting step can be used for dissolving the resin component in the oil component.

  Next, in the gelation step, the gelling agent is charged into the tank body 20 in which the pigment mixture obtained in the pigment mixture preparation step is stirred and mixed, and the temperature is 80 to 150 ° C. for 15 to 120 minutes. The mixture is stirred and mixed to react the resin component and the gelling agent to gel the resin component. The gelling step is preferably performed in view of the ink properties and printability of the offset printing ink composition, but may not be performed.

  Next, the kneading step is a step of kneading the pigment mixture obtained in the pigment mixture preparation step or the pigment mixture in which the resin component is gelled in the gelation step as necessary. In the present embodiment, the kneaded meat process includes a dispersion process, a returning process, and a circulation process.

  A dispersion | distribution process is a process performed using the dispersion apparatus 110 connected via the stirring apparatus 100 and the supply apparatus 120. FIG. In the dispersion step, the dispersion device 110 made of a bead mill is used in a state where the gelled pigment mixture stored in the tank body 20 of the stirring device 100 is maintained at a temperature of 80 to 150 ° C. and the viscosity of the pigment mixture is reduced. From the tank discharge opening 23 of the tank body 20 toward the dispersion supply opening 111 of the dispersion device 110 via the supply device 120 at a predetermined flow rate (supply amount) defined by the pressure in the vessel (internal pressure) Supply continuously. In the dispersion step, the pigment mixture supplied to the dispersion device 110 at a predetermined supply amount from the dispersion supply opening 111 is continuously dispersed (kneaded) to obtain a pigment dispersion.

  In the returning step, the pigment dispersion continuously obtained in the dispersion step is continuously discharged (discharged) from the dispersion discharge opening 112 of the dispersion device 110 at the same flow rate (discharge amount) as the supply amount, and the tank supply opening The pigment dispersion is returned to the original tank body 20 by flowing from the section 24. In the return step, the first agitating blade 10, the second agitating blade 22, and the third agitating blade 15 in the tank main body 20 are continuously driven to rotate, and the contents accommodated in the tank main body 20 are continuously increased. Are mixed with stirring.

  A circulation process is a process performed continuously following a dispersion process and a return process. In the circulation step, the container accommodated in the tank body 20 in a state where the pigment dispersion obtained after the dispersion treatment in the returning process is returned to the tank body 20 is maintained at a temperature of 80 to 150 ° C. In a state where the viscosity is lowered, the mixture is circulated between the tank body 20 and the dispersion device 110, and the dispersion treatment in the dispersion device 110 is repeatedly performed until the particle diameter of the pigment becomes 5 μm or less to obtain a pigment dispersion. In the circulation process, the first agitating blade 10, the second agitating blade 22, and the third agitating blade 15 in the tank main body 20 are continuously driven to rotate, and the contents accommodated in the tank main body 20 are continuously maintained. Are mixed with stirring.

  Next, in the post-addition step, an ink component for offset printing can be obtained by adding an oil component, an additive, an extender pigment, and the like to the pigment dispersion obtained in the circulation step and stirring and mixing.

<Specific production example in sixth usage example>
Below, although the specific example of manufacture of the ink composition for offset printing in the 6th usage example of the stirring apparatus 100 is demonstrated in detail, this invention is not limited only to these manufacture examples. In addition, about the ink composition for offset printing, the residue rate, Raleigh viscosity, tack value, coloring power, and printability were evaluated. These evaluations followed the method described above. However, the evaluation of the coloring power was carried out by relatively evaluating the coloring power of Reference Example 8 as “100” for the yellow offset printing ink compositions of Production Examples 16, 20, 21, 22 and Reference Example 12, and Production Examples For the 17 and 23 red offset printing ink compositions, the coloring power of Reference Example 9 was evaluated as “100”, and for the indigo offset printing ink composition of Production Example 18, the coloring power of Reference Example 10 was evaluated. Was evaluated as “100”, and the black offset printing ink composition of Production Example 19 was evaluated relative to the coloring power of Reference Example 11 as “100”.

(Production Example 16)
The ink composition for offset printing was manufactured using the stirring apparatus 100 shown in FIG. As for the size of the stirring apparatus 100 used in Production Example 16, “W1” is set to 210 mm, and “H1 + H2 + H3 + H4” is set to 350 mm. The stirring device 100 used in Production Example 16 is “W1” 1800 mm, “W2” 1150 mm, “H1” 369 mm, “H2” 807 mm, “H3” 1303 mm, With respect to the stirring device in which “H4” is set to 287 mm and “H5” is set to 600 mm, it is 0.117 (210 mm / 1800 mm) times in the direction perpendicular to the central axis S, and 0.127 ( 350 mm / 2766 mm) times the size.

[Wet process]
In the tank body 20 of the agitator 100, 9.85 parts by mass of dried pigment (Pigment Yellow 174), 2.5 parts by mass of linseed oil as an oil component, 15.93 parts by mass of soybean oil, 5 parts by mass of soybean oil fatty acid butyl ester And 14 parts by mass of AF-7 petroleum solvent (manufactured by Nippon Oil Corporation) were charged. Then, in a state where the temperature of the tank body 20 is maintained at 130 ° C., the first stirring blade 10 and the third stirring blade 15 (the rotation diameter L4 is set to 52% with respect to the inner diameter of the tank body 20). The second stirring blade 22 is rotated and driven so that the peripheral speed of the tip at the outermost peripheral edge is 13 m / s (536 rpm), and the peripheral speed of the tip at the outermost peripheral edge is 1.0 m / s. (10 rpm) is driven to rotate (however, the rotation direction of the second stirring blade 22 is opposite to the rotation direction of the first stirring blade 10 and the third stirring blade 15) and accommodated in the tank body 20 The resulting container was stirred for 48 minutes to obtain a pigment wet product.

[Pigment mixture preparation step and gelation step]
Next, in the pigment wet matter in the tank body 20, 25.5 parts by mass of a rosin-modified phenolic resin (trade name: OR-357, manufactured by Seiko Polymer Co., Ltd.) in a lump state, a liquid large substance having a basic skeleton made of isophthalic acid. Add 0.53 parts by mass of bean oil-modified alkyd resin (acid value 9 KOHmg / g) and keep the temperature of the tank body 20 at 130 ° C., the first stirring blade 10 and the third stirring blade 15 are The peripheral speed of the tip of the tip is 13 m / s (536 rpm), respectively, and the second agitating blade 22 is driven at a peripheral speed of 1.0 m / s (10 rpm) at the tip of the outermost peripheral edge. Rotating drive (however, the rotation direction of the second stirring blade 22 is opposite to the rotation direction of the first stirring blade 10 and the third stirring blade 15), and stirring and mixing for 24 minutes, and the rosin in a lump state While pulverizing the sex phenolic resin to dissolve the resin component in the oil component. Thereafter, 0.54 parts by mass of an aluminum chelate as a gelling agent was added to the tank body 20 and reacted at 130 ° C. for 24 minutes to obtain a gelled pigment mixture. In Production Example 16, when the gelling agent is added to the tank body 20 in the gelation step, each raw material is placed in the tank body 20 so that the occupation ratio with respect to the entire internal space of the tank body 20 becomes 80%. Was charged.

[Meat meat process]
Next, the gelled pigment mixture accommodated in the tank body 20 is maintained at 130 ° C., and the peripheral speed of the first stirring blade 10 and the third stirring blade 15 is 13 m / s (at the outermost peripheral edge portion). 536 rpm), and the second stirring blade 22 is rotationally driven so that the peripheral speed of the tip portion at the outermost peripheral edge portion is 1.0 m / s (10 rpm) (however, the second stirring blade) The rotating direction of 22 is in the state opposite to the rotating direction of the first stirring blade 10 and the third stirring blade 15), and the dynomill (Symalene type) that is the dispersion device 110 is used by the transport pump that is the supply device 120. DYNO-MILL type KDL-PILOT 1.4L, steel beads: Φ1.5 mm) and dispersion treatment was performed so as to satisfy the conditions shown in Table 6 to obtain a pigment dispersion. The pigment dispersion is returned to the original tank body 20 by the supply device 120 and supplied to the dispersion device 110 repeatedly until the particle diameter of the pigment is 5 μm or less (confirm the particle diameter by a grindometer) 16 yellow pigment dispersions were obtained.

[Post-addition process]
Next, 13.75 parts by mass of soybean oil and 13.75 parts by mass of AF-7 petroleum solvent (manufactured by Nippon Oil Corporation) are added to the yellow pigment dispersion in the tank body 20, and the first stirring blade 10 and The third stirring blade 15 is rotationally driven so that the peripheral speed of the tip portion at the outermost peripheral edge portion is 13 m / s (536 rpm), and the second stirring blade 22 is rotated at the peripheral speed of the tip portion at the outermost peripheral edge portion. Is driven so as to be 1.0 m / s (10 rpm) (however, the rotation direction of the second stirring blade 22 is opposite to the rotation direction of the first stirring blade 10 and the third stirring blade 15). The mixture was stirred and mixed for 8 minutes to obtain an ink composition for offset printing.

(Production Example 17)
A red offset printing ink composition of Production Example 17 was obtained in the same manner as in Production Example 16 except that the pigment was changed to Pigment Red 57: 1.

(Production Example 18)
A deep blue ink composition for offset printing of Production Example 18 was obtained in the same manner as in Production Example 16 except that the pigment was changed to Pigment Blue 15: 3.

(Production Example 19)
A black offset printing ink composition of Production Example 19 was obtained in the same manner as in Production Example 16 except that the pigment was changed to carbon black.

(Production Example 20)
A pigment mixture gelled by the same method as in Production Example 16 was obtained, and this pigment mixture was supplied to a three-roll mill until the particle diameter of the pigment became 5 μm or less (the particle diameter was confirmed by a grindometer). The yellow offset printing ink composition of Production Example 20 was obtained by kneading under the described conditions.

(Production Example 21)
A pigment mixture gelled by the same method as in Production Example 16 was obtained, and this pigment mixture was supplied to Dynomill (Shinmaruen Type Rise, DYNO-MILL type KDL-PILOT 1.4L, steel beads: Φ1.5 mm). Then, one cycle of the circulation process was performed under the conditions shown in Table 6 until the particle diameter of the pigment became 5 μm or less, and the yellow offset printing ink composition of Production Example 21 was obtained.

(Production Example 22)
The ink composition for offset printing was manufactured using the stirring apparatus 100 shown in FIG. As for the size of the stirring apparatus 100 used in Production Example 22, “W1” is set to 210 mm, and “H1 + H2 + H3 + H4” is set to 350 mm. The stirring device 100 used in Production Example 22 is “W1” 1800 mm, “W2” 1150 mm, “H1” 369 mm, “H2” 807 mm, “H3” 1303 mm, With respect to the stirring device in which “H4” is set to 287 mm and “H5” is set to 600 mm, it is 0.117 (210 mm / 1800 mm) times in the direction perpendicular to the central axis S, and 0.127 ( 350 mm / 2766 mm) times the size.

[Wet process]
In the tank main body 20 of the stirring apparatus 100, 9.85 parts by mass of a dried pigment (Pigment Yellow 174) and 15.93 parts by mass of soybean oil as an oil component were charged. Then, in a state where the temperature of the tank body 20 is maintained at 130 ° C., the first stirring blade 10 and the third stirring blade 15 (the rotation diameter L4 is set to 52% with respect to the inner diameter of the tank body 20). The second stirring blade 22 is rotated and driven so that the peripheral speed of the tip at the outermost peripheral edge is 13 m / s (536 rpm), and the peripheral speed of the tip at the outermost peripheral edge is 1.0 m / s. (10 rpm) is driven to rotate (however, the rotation direction of the second stirring blade 22 is opposite to the rotation direction of the first stirring blade 10 and the third stirring blade 15) and accommodated in the tank body 20 The resulting container was stirred for 48 minutes to obtain a pigment wet product.

[Pigment mixture preparation step and gelation step]
Subsequently, 2.5 parts by mass of linseed oil, 5 parts by mass of soybean oil fatty acid butyl ester, 14 parts by mass of AF-7 petroleum solvent (manufactured by Nippon Oil Co., Ltd.), resin, Liquid soybean oil-modified alkyd resin (acid value: 9 KOHmg / g) having a basic skeleton composed of 25.5 parts by mass of rosin-modified phenol resin (trade name: OR-357, manufactured by Seiko Polymer Co., Ltd.) as an ingredient ) In a state where 0.53 parts by mass were added and the temperature of the tank body 20 was maintained at 130 ° C., the peripheral speed of the tip part at the outermost peripheral edge of the first stirring blade 10 and the third stirring blade 15 was 13 m / s (536 rpm), and the second stirring blade 22 is driven to rotate so that the peripheral speed of the tip at the outermost peripheral edge is 1.0 m / s (10 rpm). However, the rotation direction of the second stirring blade 22 is opposite to the rotation direction of the first stirring blade 10 and the third stirring blade 15), and the mixture is stirred and mixed for 24 minutes to crush the rosin-modified phenol resin in a lump state. The resin component was dissolved in the oil component. Thereafter, 0.54 parts by mass of an aluminum chelate as a gelling agent was added to the tank body 20 and reacted at 130 ° C. for 24 minutes to obtain a gelled pigment mixture.

[Meat meat process]
Next, the gelled pigment mixture accommodated in the tank body 20 is maintained at 130 ° C., and the peripheral speed of the first stirring blade 10 and the third stirring blade 15 is 13 m / s (at the outermost peripheral edge portion). 536 rpm), and the second stirring blade 22 is rotationally driven so that the peripheral speed of the tip portion at the outermost peripheral edge portion is 1.0 m / s (10 rpm) (however, the second stirring blade) The rotating direction of 22 is in the state opposite to the rotating direction of the first stirring blade 10 and the third stirring blade 15), and the dynomill (Symalene type) that is the dispersion device 110 is used by the transport pump that is the supply device 120. DYNO-MILL type KDL-PILOT 1.4L, steel beads: Φ1.5 mm) and dispersion treatment was performed so as to satisfy the conditions shown in Table 6 to obtain a pigment dispersion. The pigment dispersion is returned to the original tank body 20 by the supply device 120 and supplied to the dispersion device 110 repeatedly until the particle diameter of the pigment is 5 μm or less (confirm the particle diameter by a grindometer) 22 yellow pigment dispersions were obtained.

[Post-addition process]
Next, 13.75 parts by mass of soybean oil and 13.75 parts by mass of AF-7 petroleum solvent (manufactured by Nippon Oil Corporation) are added to the yellow pigment dispersion in the tank body 20, and the first stirring blade 10 and The third stirring blade 15 is rotationally driven so that the peripheral speed of the tip portion at the outermost peripheral edge portion is 13 m / s (536 rpm), and the second stirring blade 22 is rotated at the peripheral speed of the tip portion at the outermost peripheral edge portion. Is driven so as to be 1.0 m / s (10 rpm) (however, the rotation direction of the second stirring blade 22 is opposite to the rotation direction of the first stirring blade 10 and the third stirring blade 15). The mixture was stirred and mixed for 8 minutes to obtain an ink composition for offset printing.

(Production Example 23)
As shown in Table 6, in the same manner as in Production Example 17 except that the supply temperature of the gelled pigment mixture in the dispersion step and the discharge temperature of the pigment mixture in the return step were changed to 90 ° C. A red offset ink composition for offset printing was obtained.

(Reference Example 8)
In Reference Example 8, an ink composition for offset printing was produced without using the stirring device 100. In Reference Example 8, a “varnish preparation step” and a “gelation step” are performed using a stirring device in which a conventional cutter blade (disc turbine blade) is installed in a bottomed cylindrical tank having a height of 250 mm and an inner diameter of 210 mm. And the “premixing step”, the subsequent “dispersing step” supplies the pigment mixture obtained by the stirring device to a three-roll mill, and the “post-addition step” further disperses the pigment obtained by the three-roll mill. The body was transferred to the stirring device to produce an ink composition for offset printing.

[Varnish preparation process]
In the tank, as oil components, linseed oil 2.5 parts by mass, soybean oil 15.93 parts by mass, soybean oil fatty acid butyl ester 5 parts by mass, AF-7 petroleum solvent (manufactured by Nippon Oil Corporation), 14 parts by mass, As a resin component, 25.5 parts by mass of a rosin-modified phenol resin (trade name: OR-357, manufactured by Seiko Polymer Co., Ltd.), a liquid soybean oil-modified alkyd resin (acid value: 9 KOHmg) having a basic skeleton composed of isophthalic acid / G) 0.53 parts by mass were charged. Then, with the temperature of the tank held at 200 ° C., the disk turbine blades are rotationally driven so that the peripheral speed of the tip portion at the outermost peripheral edge portion is 13 m / s, and the contents accommodated in the tank are The mixture was stirred for 40 minutes to dissolve the rosin-modified phenol resin in a lump state.

[Gelification process]
Next, 0.54 parts by mass of aluminum chelate was added as a gelling agent in the tank and reacted at 130 ° C. for 30 minutes to obtain a resin varnish.

[Premixing process]
Next, 9.85 parts by mass of the dried pigment (Pigment Yellow 174) is added to the tank, and the disk turbine blade is moved at the peripheral speed of the tip at the outermost peripheral part while maintaining the temperature of the tank at 70 ° C. Was rotated at a speed of 13 m / s, and the contents accommodated in the tank were stirred for 30 minutes to perform premixing.

[Dispersing process]
Supply the pigment mixture that had been premixed in the tank to a three-roll mill, and kneaded under the conditions shown in Table 7 until the particle size of the pigment became 5 μm or less (confirm the particle size with a grindometer). A yellow pigment dispersion of 8 was obtained.

[Post-addition process]
The yellow pigment dispersion after kneading with a three-roll mill is supplied to the tank, and 13.75 parts by mass of AF-7 petroleum solvent (manufactured by Nippon Oil Corporation) is added and mixed for 10 minutes. Reference Example 8 Yellow offset printing ink composition was obtained.

(Reference Example 9)
A red offset printing ink composition of Reference Example 9 was obtained in the same manner as in Reference Example 8 except that the pigment was changed to Pigment Red 57: 1.

(Reference Example 10)
A deep blue ink composition for offset printing of Reference Example 10 was obtained in the same manner as in Reference Example 8 except that the pigment was changed to Pigment Blue 15: 3.

(Reference Example 11)
A black offset printing ink composition of Reference Example 11 was obtained in the same manner as in Reference Example 8 except that the pigment was changed to carbon black.

(Reference Example 12)
In the same manner as in Reference Example 8, premixing was performed to obtain a pigment mixture. The pigment mixture after premixing in the tank is supplied to Dynomill (Shinmaruen Type Rise's DYNO-MILL type KDL-PILOT 1.4L, steel beads: Φ1.5 mm), and the pigment particle size is 5 μm. The circulation process was performed for 2 passes under the conditions described in Table 7 until the following conditions were obtained, whereby the yellow pigment dispersion of Reference Example 12 was obtained. Next, the yellow pigment dispersion after kneading with dynomill is supplied to the tank, 13.75 parts by mass of AF-7 petroleum solvent (manufactured by Nippon Oil Corporation) is added, and the disk turbine blade is moved to the outermost periphery. The tip was rotated at a peripheral speed of 13 m / s and stirred and mixed to obtain a yellow offset printing ink composition of Reference Example 12.

  The evaluation results in the ink compositions for offset printing of Production Examples 16 to 23 are shown in Table 6, and the evaluation results in the ink compositions for offset printing of Reference Examples 8 to 12 are shown in Table 7.

  As shown in Tables 6 and 7, in Production Examples 16 to 23, it is possible to obtain a final ink composition for offset printing with one stirring device 100, ink characteristics such as tack value and coloring power, and printing. It can be seen that the total time required for production was shortened compared to Reference Examples 8 to 12 while maintaining the high aptitude.

<Seventh use example>
As a 7th usage example of the stirring apparatus 100 of this embodiment, the usage example at the time of manufacture of the ink composition for offset printing can be mentioned. The manufacturing method of the ink composition for offset printing in the 7th usage example of the stirring apparatus 100 is performed using the manufacturing system 1 shown in FIG. 3, and the manufacturing system 2 shown in FIG. As described above, the manufacturing system 1 is a system in which the stirring device 100 and the dispersion device 110 are connected via the supply device 120. The manufacturing system 2 is the same as the manufacturing system 1 except that the stirring device 100 and the dispersing device 110 are not connected. Therefore, below, the method of manufacturing the ink composition for offset printing using the manufacturing system 1 is demonstrated, and description about the method of manufacturing the ink composition for offset printing using the manufacturing system 2 is abbreviate | omitted.

  As the dispersing device 110 in the seventh usage example, for example, a three-roll mill or a bead mill (pass method) can be used. In this embodiment, a bead mill is used. As the bead mill, bead mills such as ceramic beads such as zirconia beads having a diameter of 0.2 to 3 mm, dyno mills using steel beads and the like as grinding media, and DCP mills can be used. The supply device 120 is a pump, a screw extruder, or the like, and the object to be stirred discharged from the tank discharge opening 23 of the tank body 20 provided in the stirring device 100 is dispersedly supplied by the dispersion device 110. Liquid is fed toward the opening 111.

  The manufacturing method of the ink composition for offset printing in the 7th usage example of the stirrer 100 includes a premixing step, a gelation step, and a kneading step.

  The premixing step is a step performed using the stirring device 100, and the total amount of the pigment, the resin component, and the oil component contained in the ink composition for offset printing that is finally produced is contained in the tank body 20. The first stirring blade 10, the second stirring blade 22, and the third stirring blade 15 are rotationally driven and stirred and mixed at a temperature of 80 to 200 ° C. to obtain a pigment mixture. By stirring and mixing at a temperature of 80 to 200 ° C., it is possible to prevent a transesterification reaction between the resin and the oil component, and to suppress the lowering of the molecular weight of the resin. A pigment mixture in which the resin is dissolved in the components can be obtained.

  The stirring and mixing time in the premixing process is the dissolution of the resin component in the oil component (if the resin component is a solid resin coarsely pulverized in block, flake or granular form, it dissolves in the oil component while pulverizing the solid resin. ) Is set in consideration of the time required for the mixing, and can be shortened by stirring and mixing at a high temperature. However, the optimum temperature condition depends on the amount of heat energy applied and the solubility of the resin used in the oil component. The stirring and mixing time to be set varies depending on the optimum temperature condition. The stirring and mixing time is 15 to 60 minutes as one guide when considering energy efficiency and workability.

  Next, in the gelation step, the gelling agent is charged into the tank body 20 where the pigment mixture obtained in the premixing step is stirred and mixed, and stirred at a temperature of 80 to 150 ° C. for 15 to 120 minutes. The resin component and the gelling agent are mixed and reacted to gel the resin component. The gelling step is preferably performed in view of the ink properties and printability of the offset printing ink composition, but may not be performed.

  Next, the kneading process is a process of kneading the pigment mixture obtained in the premixing process or the pigment mixture in which the resin component is gelled in the gelation process as necessary. In the present embodiment, the kneaded meat process includes a dispersion process, a returning process, and a circulation process.

  A dispersion | distribution process is a process performed using the dispersion apparatus 110 connected via the stirring apparatus 100 and the supply apparatus 120. FIG. In the dispersion step, the pigment mixture obtained in the premixing step and stored in the tank body 20 of the stirring device 100 is maintained at a temperature of 80 to 150 ° C., and the viscosity of the pigment mixture is reduced, and the bead mill is used. From the tank discharge opening 23 of the tank body 20 to the dispersion supply opening 111 of the dispersion apparatus 110 via the supply apparatus 120 at a predetermined flow rate (supply amount) defined by the pressure (internal pressure) in the vessel of the dispersion apparatus 110. Supply continuously. In the dispersion step, the pigment mixture supplied to the dispersion device 110 at a predetermined supply amount from the dispersion supply opening 111 is continuously dispersed (kneaded) to obtain a pigment dispersion.

  Next, the return step continuously discharges (discharges) the pigment dispersion obtained continuously in the dispersion step from the dispersion discharge opening 112 of the dispersion apparatus 110 at the same flow rate (discharge amount) as the supply amount. The pigment dispersion is returned to the original tank body 20 by flowing through the tank supply opening 24. In the return step, the first agitating blade 10, the second agitating blade 22, and the third agitating blade 15 in the tank main body 20 are continuously driven to rotate, and the contents accommodated in the tank main body 20 are continuously increased. Are mixed with stirring.

  Next, a circulation process is a process performed continuously following a dispersion | distribution process and a return process. In the circulation step, the container accommodated in the tank body 20 in a state where the pigment dispersion obtained after the dispersion treatment in the returning process is returned to the tank body 20 is maintained at a temperature of 80 to 150 ° C. In a state where the viscosity is lowered, the ink is circulated between the tank body 20 and the dispersion device 110, and the dispersion treatment in the dispersion device 110 is repeatedly performed until the particle diameter of the pigment becomes 5 μm or less. obtain. In the circulation process, the first agitating blade 10, the second agitating blade 22, and the third agitating blade 15 in the tank main body 20 are continuously driven to rotate, and the contents accommodated in the tank main body 20 are continuously maintained. Are mixed with stirring.

<Specific production example in seventh use example>
Below, although the specific example of manufacture of the ink composition for offset printing in the 7th usage example of the stirring apparatus 100 is demonstrated in detail, this invention is not limited only to these manufacture examples. In addition, about the ink composition for offset printing, the residue rate, Raleigh viscosity, tack value, coloring power, and printability were evaluated. These evaluations followed the method described above. However, the coloring power was evaluated relative to the offset printing ink compositions of Production Examples 24 and 25, assuming that the coloring power of Reference Example 13 was “100”.

(Production Example 24)
The ink composition for offset printing was manufactured using the stirring apparatus 100 shown in FIG. As for the size of the stirring apparatus 100 used in Production Example 24, “W1” is set to 210 mm, and “H1 + H2 + H3 + H4” is set to 350 mm. The stirring device 100 used in Production Example 24 is “W1” of 1800 mm, “W2” of 1150 mm, “H1” of 369 mm, “H2” of 807 mm, “H3” of 1303 mm, With respect to the stirring device in which “H4” is set to 287 mm and “H5” is set to 600 mm, it is 0.117 (210 mm / 1800 mm) times in the direction perpendicular to the central axis S, and 0.127 ( 350 mm / 2766 mm) times the size.

[Premixing process]
In the tank body 20 of the stirring device 100, 28 parts by mass (solid resin) of rosin-modified phenol resin having a softening point of 165 ° C., 3 parts by mass of soybean oil-modified alkyd resin, 13.5 parts by mass of Pigment Red 57: 1, 7 parts by mass of soybean oil and 48.5 parts by mass of AF-7 petroleum solvent (manufactured by Nippon Oil Co., Ltd.) were charged so that the occupation ratio with respect to the entire internal space of the tank body 20 was 80%.

  Next, heating of the tank body 20 is started at a temperature increase rate of 8 ° C./min so that the ultimate temperature becomes 130 ° C., and simultaneously with the start of heating, the first stirring blade 10 and the third stirring blade 15 (the rotation diameter L4 is the tank). Each of which is set to 52% with respect to the inner diameter of the main body 20) so that the peripheral speed of the tip portion at the outermost peripheral edge portion is 13 m / s (536 rpm). Rotation drive so that the peripheral speed of the tip at the outermost peripheral edge is 1.0 m / s (10 rpm) (however, the rotation direction of the second stirring blade 22 is the first stirring blade 10 and the third stirring blade 15). ), And the contents contained in the tank body 20 are stirred and mixed for 50 minutes after reaching 130 ° C., and the rosin-modified phenolic resin is dissolved while being crushed and premixing is performed. Was Tsu. The pigment mixture obtained after premixing was a solution in which the rosin-modified phenol resin was completely dissolved.

[Dispersion process, return process and circulation process]
Next, the premixed pigment mixture is maintained at 130 ° C., and the first stirring blade 10 and the third stirring blade 15 (the rotation diameter L4 is set to 52% with respect to the inner diameter of the tank body 20), Each of the second stirring blades 22 is rotated and driven so that the peripheral speed of the tip portion at the outermost peripheral edge portion is 13 m / s (536 rpm), and the peripheral speed of the tip portion at the outermost peripheral edge portion is 1.0 m / s ( 10 rpm) (provided that the rotation direction of the second stirring blade 22 is opposite to the rotation direction of the first stirring blade 10 and the third stirring blade 15). A certain transport pump supplies the dispersion device 110 to Dynomill (Shinmaruen type Rise's, DYNO-MILL type KDL-PILOT 1.4L, steel beads: Φ1.5 mm), and dispersion treatment is performed to satisfy the conditions in Table 8 The Then, the dispersion-treated mixture is returned to the original tank body 20 by the supply device 120 until the particle diameter of the pigment is 5 μm or less (the particle diameter is confirmed by a grindometer). An ink composition was obtained.

(Production Example 25)
Offset printing of Production Example 25 in the same manner as Production Example 24 except that the premixing temperature and the holding temperature when the premixed pigment mixture is supplied to the dispersing device 110 are changed from 130 ° C. to 90 ° C. An ink composition was obtained. The pigment in the obtained ink composition for offset printing had a particle diameter of 5 μm or less.

(Reference Example 13)
In Reference Example 13, an ink composition for offset printing was produced without using the stirring device 100. In Reference Example 13, the “varnish preparation step” was performed using a stirrer in which a conventional cutter blade (disc turbine blade) was installed in a bottomed cylindrical tank having a height of 250 mm and an inner diameter of 210 mm. In the “premixing step”, premixing is performed in the second tank using a part of the resin varnish obtained by the stirring device, and then the “dispersing step” is performed after the premixing obtained in the second tank. The mixture is supplied to the dynomill, and the “post-addition step” is agitated and mixed in the third tank using the base mixture obtained in the dynomill and a part of the resin varnish obtained in the varnish preparation step, An ink composition for offset printing was produced.

[Varnish preparation process]
In the tank, 45 parts by mass (solid resin) of rosin-modified phenol resin having a softening point of 165 ° C., 10 parts by mass of soybean oil, and 40 parts by mass of AF-7 petroleum solvent (manufactured by Nippon Oil Co., Ltd.) were charged. Then, heating of the tank is started at a heating rate of 8 ° C./min so that the ultimate temperature becomes 200 ° C., and simultaneously with the start of heating, the peripheral speed of the tip portion at the outermost peripheral edge is set to 13 m / s. Then, the mixture was stirred and mixed for 40 minutes after reaching 200 ° C., and the rosin-modified phenol resin was dissolved to obtain a resin varnish.

[Premixing process]
Next, in a second tank having a height of 250 mm and an inner diameter of 210 mm different from the above tank, 65 parts by mass of resin varnish, 5 parts by mass of soybean oil-modified alkyd resin, 25 parts by mass of Pigment Red 57: 1, and AF-7 Petroleum 5 parts by mass of a solvent (Nippon Oil Co., Ltd.) was charged. Then, heating of the second tank is started at a temperature increase rate of 8 ° C./min so that the ultimate temperature becomes 70 ° C., and simultaneously with the start of heating, the peripheral speed of the tip portion at the outermost peripheral edge is 13 m. The mixture was rotationally driven to reach / s, and the contents accommodated in the second tank were stirred and mixed for 30 minutes after reaching 70 ° C., and premixing was performed.

[Dispersing process]
Next, the premixed mixture is supplied from the second tank to Dynomill (Dyno-Mill type KDL-PILOT 1.4L, steel beads: Φ1.5 mm, manufactured by Shinmaruen Type Rise) so that the conditions shown in Table 8 are satisfied. Was subjected to two passes of dispersion treatment to obtain a base mixture. The pigment in the base mixture had a particle size of 5 μm or less.

[Post-addition process]
Next, in a third tank having a new height of 250 mm and an inner diameter of 210 mm, the ratio is 53 parts by mass of the base mixture, 5 parts by mass of AF-7 petroleum solvent, and 42 parts by mass of the resin varnish in which the rosin-modified phenol resin is dissolved. A resin varnish in which AF-7 petroleum solvent and rosin-modified phenolic resin were dissolved was added thereto, and the disc turbine blade was rotationally driven and mixed by stirring to obtain an ink composition for offset printing of Reference Example 13.

  Table 8 shows the evaluation results of the ink compositions for offset printing of Production Examples 24 and 25 and Reference Example 13.

  As shown in Table 8, the offset printing ink compositions of Production Examples 24 and 25 can be manufactured by using one stirrer 100 to obtain the final offset printing ink composition as compared to Reference Example 13. The process is simplified, the total time required for production is shortened, and ink properties such as tack value and coloring power, and printing suitability are maintained in a high state.

<Eighth usage example>
As an eighth usage example of the stirring device 100 of the present embodiment, a usage example at the time of manufacturing an ink composition for offset printing can be given. The manufacturing method of the ink composition for offset printing in the 8th usage example of the stirring apparatus 100 is performed using the manufacturing system 1 shown in FIG.

  The manufacturing method of the ink composition for offset printing in the 8th usage example of the stirrer 100 includes a premixing step, a dispersion step, a returning step, a circulation step, and a post-addition step.

  The premixing step is a step performed using the stirring device 100, and at least a pigment, a pigment dispersing resin as a resin component, and a pigment dispersing material including an oil component are charged into the tank body 20, and the first stirring is performed. In this step, the blade 10, the second stirring blade 22, and the third stirring blade 15 are rotationally driven and mixed by stirring to obtain a pigment dispersion mixture. And the pigment dispersion material thrown in in the tank main body 20 contains a pigment at 5-40 mass%. Therefore, the pigment dispersion mixture obtained in the premixing step includes the pigment, the pigment dispersion resin, and the oil component, and the pigment is contained at 5 to 40% by mass. The stirring and mixing time of the pigment dispersion material in the premixing step and the temperature during stirring and mixing are set in consideration of the time and temperature required to dissolve the pigment dispersion resin in the oil component. The stirring and mixing time of the pigment dispersing material is, for example, 15 to 90 minutes, and the temperature during stirring and mixing of the pigment dispersing material is, for example, 25 to 200 ° C.

  Next, a dispersion | distribution process is a process performed using the dispersion apparatus 110 connected via the stirring apparatus 100 and the supply apparatus 120. FIG. In the dispersion step, the low-viscosity pigment dispersion mixture obtained in the premixing step and stored in the tank main body 20 of the stirring device 100 is converted into a pressure in the vessel (internal pressure) of the dispersion device 110 including a bead mill. The liquid is continuously supplied from the tank discharge opening 23 of the tank body 20 to the dispersion supply opening 111 of the dispersion device 110 through the supply device 120 at a prescribed flow rate (supply amount). In the dispersion step, the pigment dispersion mixture supplied to the dispersion device 110 at a predetermined supply amount from the dispersion supply opening 111 is continuously dispersed (kneaded) to obtain a primary dispersion.

  Next, in the return step, the primary dispersion continuously obtained in the dispersion step is continuously discharged (discharged) from the dispersion discharge opening 112 of the dispersion device 110 at the same flow rate (discharge amount) as the supply amount. Then, the primary dispersion is returned to the original tank body 20 by flowing through the tank supply opening 24. In the return step, the first agitating blade 10, the second agitating blade 22, and the third agitating blade 15 in the tank main body 20 are continuously driven to rotate, and the contents accommodated in the tank main body 20 are continuously increased. Are mixed with stirring.

  Next, a circulation process is a process performed continuously following a dispersion | distribution process and a return process. In the circulation step, the contents stored in the tank body 20 in a state where the primary dispersion obtained after the dispersion process in the return step is returned to the tank body 20 are transferred between the tank body 20 and the dispersion device 110. It is circulated and the dispersion treatment in the dispersion device 110 is repeated until the particle diameter of the pigment becomes 5 μm or less to obtain a pigment dispersion. In the circulation process, the first agitating blade 10, the second agitating blade 22, and the third agitating blade 15 in the tank main body 20 are continuously driven to rotate, and the contents accommodated in the tank main body 20 are continuously maintained. Are mixed with stirring.

  Next, in the post-addition step, among the ink materials of the offset printing ink composition, as the remaining ink materials excluding those charged in the tank body 20 in the premixing step, the binder resin and the oil component are used. After the circulation step is completed, the pigment dispersion is put into the tank body 20 of the stirring device 100 in which the pigment dispersion is accommodated, and the first stirring blade 10, the second stirring blade 22, and the third stirring blade 15 are driven to rotate to disperse the pigment. This is a step of stirring and mixing the mixture of the body and the remaining ink material to obtain an ink composition for offset printing.

  Further, in the post-addition step, the first stirring blade 10, the second stirring blade 22, and the third stirring blade 15 are rotationally driven, and the pigment dispersion and the remaining ink material are mixed at a temperature of 80 to 200 ° C. It is preferable to stir and mix the mixture. As a result, the transesterification reaction between the binder resin and the oil component can be prevented and the lowering of the molecular weight of the binder resin can be suppressed, and the binder resin is dissolved in the oil component (the binder resin is blocked). In the case of a solid resin coarsely pulverized into a shape, flake shape or granular form, the solid resin can be dissolved in the oil component while being pulverized.

  Further, in the post-addition step, the stirring and mixing time of the mixture of the pigment dispersion and the remaining ink material is such that the binder resin is dissolved in the oil component (the binder resin is solidly crushed into blocks, flakes or granules) In the case of resin, it is set in consideration of the time required to dissolve the solid resin in the oil component while pulverizing it, and can be shortened by stirring and mixing at a high temperature, but the amount of thermal energy to be applied There are optimum temperature conditions depending on the solubility of the binder resin used in the oil component and the like, and the stirring and mixing time to be set varies depending on the optimum temperature conditions. The stirring and mixing time is 15 to 60 minutes as one guide when considering energy efficiency and workability.

  In the post-addition step, an ink composition for offset printing is prepared using the pigment dispersion obtained in the circulation step and the pigment dispersion in which the pigment is highly dispersed. An ink composition for offset printing in which the ink characteristics are maintained in a high state can be obtained.

<Specific Manufacturing Example in Eighth Usage Example>
Below, although the specific example of manufacture of the ink composition for offset printing in the 8th usage example of the stirring apparatus 100 is demonstrated in detail, this invention is not limited only to these manufacture examples. In addition, about the ink composition for offset printing, the residue rate, Raleigh viscosity, tack value, coloring power, and printability were evaluated. These evaluations followed the method described above. However, with respect to the evaluation of the coloring power, the offset printing ink composition of Production Example 26 was relatively evaluated by setting the coloring power of Reference Example 14 to “100”.

(Production Example 26)
The ink composition for offset printing was manufactured using the stirring apparatus 100 shown in FIG. As for the size of the stirring apparatus 100 used in Production Example 26, “W1” is set to 210 mm, and “H1 + H2 + H3 + H4” is set to 350 mm. The stirrer 100 used in Production Example 26 is “W1” of 1800 mm, “W2” of 1150 mm, “H1” of 369 mm, “H2” of 807 mm, “H3” of 1303 mm, With respect to the stirring device in which “H4” is set to 287 mm and “H5” is set to 600 mm, it is 0.117 (210 mm / 1800 mm) times in the direction perpendicular to the central axis S, and 0.127 ( 350 mm / 2766 mm) times the size.

[Premixing process]
In the tank body 20 of the stirring device 100, 3.7 parts by mass of soybean oil-modified alkyd resin, 20 parts by mass of Pigment Red 57: 1, 8 parts by mass of soybean oil, and AF-7 petroleum solvent (manufactured by Nippon Oil Co., Ltd.) 68 3 parts by weight were charged. The first stirring blade 10 and the third stirring blade 15 (the rotation diameter L4 is set to 52% with respect to the inner diameter of the tank body 20) are set so that the peripheral speed of the tip portion at the outermost peripheral portion is 13 m / s (536 rpm), respectively, and the second stirring blade 22 is driven to rotate so that the peripheral speed of the tip at the outermost peripheral edge is 1.0 m / s (10 rpm) (however, the second The rotation direction of the agitating blade 22 is opposite to the rotation direction of the first agitating blade 10 and the third agitating blade 15), and the contents accommodated in the tank body 20 are removed at a temperature of 60 ° C. for 12 minutes. The mixture was stirred and mixed to obtain a pigment dispersion mixture.

[Dispersion process, return process and circulation process]
Next, the first stirring blade 10 and the third stirring blade 15 are respectively driven to rotate so that the peripheral speed of the tip portion at the outermost peripheral edge portion is 13 m / s (536 rpm), and the second stirring blade 22 is moved to the outermost periphery. Rotation drive so that the peripheral speed of the tip at the peripheral edge is 1.0 m / s (10 rpm) (however, the rotation direction of the second stirring blade 22 is the rotation direction of the first stirring blade 10 and the third stirring blade 15) The pigment dispersion mixture after the premixing in the tank body 20 is made into a dispersion device 110 DYNO-MILL (manufactured by Shinmaruen type Rise, DYNO-MILL type KDL-PILOT 1.4L, Steel beads: Φ1.5 mm), dispersion treatment is performed so that the conditions shown in Table 9 are satisfied, and the dispersion-treated mixture is returned to the original tank body 20 by a transport pump which is a supply device 120. Diameter Was repeated until the particle size became 5 μm or less (the particle diameter was confirmed by a grindometer) to obtain a pigment dispersion.

[Post-addition process]
Next, with respect to 65 parts by mass of the pigment dispersion accommodated in the tank body 20 after the dispersion treatment, 31 parts by mass of rosin-modified phenol resin (solid binder resin) having a softening point of 165 ° C. is used as the remaining ink material. 4 parts by mass of AF-7 petroleum solvent (manufactured by Nippon Oil Co., Ltd.) was added. In Production Example 26, when the remaining ink material is added into the tank body 20 in the post-addition step, each raw material is placed in the tank body 20 so that the occupation ratio with respect to the entire internal space of the tank body 20 becomes 80%. Was charged. Then, the mixture contained in the tank body 20 is heated at a heating rate of 8 ° C./min so that the temperature of the mixture becomes 130 ° C. At the same time as the heating is started, the first stirring blade 10 and the third stirring blade 15 are Each of the second stirring blades 22 is rotated and driven so that the peripheral speed of the tip portion at the outer peripheral edge portion is 13 m / s (536 rpm), and the peripheral speed of the tip portion at the outermost peripheral edge portion is 1.0 m / s (10 rpm). (The rotation direction of the second stirring blade 22 is opposite to the rotation direction of the first stirring blade 10 and the third stirring blade 15), and rosin modified phenolic resin (solid binder resin) ) Was dissolved while being pulverized, and the components were stirred and mixed to obtain a resin composition for ink for offset printing of Production Example 26.

(Reference Example 14)
In Reference Example 14, an ink composition for offset printing was produced without using the stirring device 100. In Reference Example 14, the “varnish preparation step” was performed using a stirrer in which a conventional cutter blade (disc turbine blade) was installed in a bottomed cylindrical tank having a height of 250 mm and an inner diameter of 210 mm. In the “premixing step”, premixing is performed in the second tank using a part of the resin varnish obtained by the stirring device, and then the “dispersing step” is performed after the premixing obtained in the second tank. The mixture is supplied to the dynomill, and the “post-addition step” is agitated and mixed in the third tank using the base mixture obtained in the dynomill and a part of the resin varnish obtained in the varnish preparation step, An ink composition for offset printing was produced.

[Varnish preparation process]
In the tank, 45 parts by mass of rosin-modified phenol resin having a softening point of 165 ° C. (solid binder resin), 10 parts by mass of soybean oil, and 40 parts by mass of AF-7 petroleum solvent (manufactured by Nippon Oil Co., Ltd.) were charged. Then, heating was started so that the ultimate temperature was 200 ° C., and at the same time, the disk turbine blade was rotationally driven. After reaching 200 ° C., the mixture was stirred and mixed for 40 minutes to dissolve the rosin-modified phenolic resin to obtain a resin varnish.

[Premixing process]
Next, in a second tank having a height of 250 mm and an inner diameter of 210 mm, another tank, 65 parts by mass of resin varnish, 5 parts by mass of soybean oil-modified alkyd resin, 25 parts by mass of Pigment Red 57: 1, and AF-7 Petroleum 5 parts by mass of a solvent (manufactured by Nippon Oil Co., Ltd.) was charged. Then, the disk turbine blade was rotationally driven so that the peripheral speed of the tip portion at the outermost peripheral edge portion was 13 m / s, and was stirred and mixed at 70 ° C. for 30 minutes to perform premixing.

[Dispersing process]
Next, the mixture after premixing is supplied from the second tank to the dynomill (Shinmaruen type Rise, DYNO-MILL type KDL-PILOT 1.4L, steel beads: Φ1.5 mm), so that the conditions in Table 9 are satisfied. Was subjected to two passes of dispersion treatment to obtain a base mixture. The pigment in the base mixture had a particle size of 5 μm or less.

[Post-addition process]
Next, in a third tank having a new height of 250 mm and an inner diameter of 210 mm, the ratio is 53 parts by mass of the base mixture, 5 parts by mass of AF-7 petroleum solvent, and 42 parts by mass of the resin varnish in which the rosin-modified phenol resin is dissolved. A resin varnish in which AF-7 petroleum solvent and rosin-modified phenolic resin are dissolved is added, and the disturban blade is rotationally driven and stirred and mixed at a temperature of 60 ° C. to obtain the offset printing ink composition of Reference Example 14. Obtained.

  Table 9 shows the evaluation results of the ink compositions for offset printing of Production Example 26 and Reference Example 14.

  As shown in Table 9, the ink composition for offset printing of Production Example 26 can obtain the final ink composition for offset printing with one stirring device 100 with respect to Reference Example 14, and the production process Is simplified, the total time required for production is shortened, and ink properties such as tack value and coloring power, and printability are maintained in a high state.

<Ninth usage example>
As a ninth usage example of the stirrer 100 of the present embodiment, a usage example at the time of manufacturing an ink composition for offset printing can be given. The manufacturing method of the ink composition for offset printing in the 9th usage example of the stirring apparatus 100 is performed using the manufacturing system 1 shown in FIG. 3, and the manufacturing system 2 shown in FIG. As described above, the manufacturing system 1 is a system in which the stirring device 100 and the dispersion device 110 are connected via the supply device 120. The manufacturing system 2 is the same as the manufacturing system 1 except that the stirring device 100 and the dispersing device 110 are not connected. Therefore, below, the method of manufacturing the ink composition for offset printing using the manufacturing system 1 is demonstrated, and description about the method of manufacturing the ink composition for offset printing using the manufacturing system 2 is abbreviate | omitted.

  As the dispersing device 110 in the ninth usage example, for example, a three-roll mill or a bead mill (pass method) can be used. In this embodiment, a bead mill is used. As the bead mill, bead mills such as ceramic beads such as zirconia beads having a diameter of 0.2 to 3 mm, dyno mills using steel beads and the like as grinding media, and DCP mills can be used. The supply device 120 is a pump, a screw extruder, or the like, and the object to be stirred discharged from the tank discharge opening 23 of the tank body 20 provided in the stirring device 100 is dispersedly supplied by the dispersion device 110. Liquid is fed toward the opening 111.

  The manufacturing method of the ink composition for offset printing in the ninth usage example of the stirring device 100 includes a wetting step, a transition step, a pigment mixture preparation step, a gelation step, a kneading step, and a post-addition step. .

  The wetting step is a pigment water dispersion step performed using the stirring device 100. Water and a dried pigment are charged into the tank body 20, and the first stirring blade 10, the second stirring blade 22, and the third stirring blade. 15 is driven to rotate, and the mixture is stirred and mixed at a temperature of 20 to 100 ° C. for about 3 to 30 minutes, whereby the pigment is wetted with water to obtain a wet pigmented water dispersion. The amount of water used for the pigment is preferably 30 to 250 parts by mass with respect to 100 parts by mass of the pigment. However, in order to shorten the subsequent dehydration step, the amount of water used is preferably as small as possible. Further, in the wetting step, in addition to water and the dried pigment, a pigment dispersant, a surface treatment agent, a surfactant and the like may be added.

  Next, the transition step is a step performed using the stirring device 100, and the oil component is put into the tank body 20 in which the pigment water wet matter obtained in the wetting step is stirred and mixed, and the first stirring is performed. The blade 10, the second stirring blade 22, and the third stirring blade 15 are rotationally driven, and the pigment water wet product and the oil component are preferably stirred and mixed at a temperature of 20 to 100 ° C. for about 3 to 30 minutes. By transferring the pigment dispersed in water into the oil component, a wetted pigment oil component is obtained. Although the usage-amount of the oil component with respect to a pigment changes with kinds etc. of a pigment, 50-400 mass parts is preferable with respect to 100 mass parts of pigments.

  Next, the pigment mixture preparation step is a step performed using the stirrer 100. The pigment oil component wet matter obtained in the transfer step is dehydrated, and the resin component is dissolved in the oil component to prepare the pigment mixture. It is a process to do. In the present embodiment, the pigment mixture preparation step includes a resin component addition step, a dehydration step, and a resin component dissolution step.

  In the resin component addition step, the resin component is charged into the tank body 20 in which the pigment oil component wet product obtained in the transfer step is stirred and mixed to obtain a resin component mixture. Although the usage-amount of a resin component changes with kinds etc. of a pigment, 30-300 mass parts is preferable with respect to 100 mass parts of pigments.

  In the dehydration step, the inside of the tank main body 20 is depressurized by the depressurization dehydrating means 30, the first stirring blade 10, the second stirring blade 22 and the third stirring blade 15 are rotationally driven, and the resin component mixture is heated to a temperature of 65 to 100 ° C. When the resin component is a solid resin coarsely pulverized into a block shape, flake shape or granular shape by stirring and mixing under the above, the solid resin is pulverized and the water content of the resin component mixture is 2 mass% or less. Dehydrate. As a result, a dehydrated product is obtained. In addition, since a yellow pigment has big influence on a hue with temperature, when using a yellow pigment, it is preferable to dehydrate at about 30-60 degreeC. The resin component mixture in the tank body 20 in the dehydration step is dehydrated under conditions of a pressure of 31.8 to 760 mmHg at which the temperature is about 30 to 100 ° C. In the case of using a pigment susceptible to heat, for example, a water-containing pigment containing a yellow pigment, the dehydration of the resin component mixture in the tank body 20 in the dehydration step is performed at a pressure of 31.8 to about 30 to 60 ° C. It is preferable to carry out under the condition of 149 mmHg.

  In the resin component dissolution step, the first stirring blade 10, the second stirring blade 22, and the third stirring blade 15 are rotationally driven, and the dehydrated product is preferably at a temperature of 80 to 200 ° C, more preferably 80 to 150 ° C. By stirring and mixing for 15 to 120 minutes, the resin component is dissolved in the oil component to obtain a pigment mixture. By stirring and mixing at a temperature of 80 to 200 ° C., it is possible to prevent the transesterification reaction between the resin component and the oil component, and to suppress the lowering of the molecular weight of the resin component, and for a short time. Thus, a pigment mixture in which the resin component is dissolved in the oil component can be obtained.

  Next, in the gelation step, the gelling agent is charged into the tank body 20 in which the pigment mixture obtained in the pigment mixture preparation step is stirred and mixed, and the temperature is 80 to 150 ° C. for 15 to 120 minutes. The mixture is stirred and mixed to react the resin component and the gelling agent to gel the resin component. The gelling step is preferably performed in view of the ink properties and printability of the offset printing ink composition, but may not be performed.

  Next, the kneading step is a step of kneading the pigment mixture obtained in the pigment mixture preparation step or the pigment mixture in which the resin component is gelled in the gelation step as necessary. In the present embodiment, the kneaded meat process includes a dispersion process, a returning process, and a circulation process.

  A dispersion | distribution process is a process performed using the dispersion apparatus 110 connected via the stirring apparatus 100 and the supply apparatus 120. FIG. In the dispersion step, the dispersion device 110 made of a bead mill is used in a state where the gelled pigment mixture stored in the tank body 20 of the stirring device 100 is maintained at a temperature of 80 to 150 ° C. and the viscosity of the pigment mixture is reduced. From the tank discharge opening 23 of the tank body 20 toward the dispersion supply opening 111 of the dispersion device 110 via the supply device 120 at a predetermined flow rate (supply amount) defined by the pressure in the vessel (internal pressure) Supply continuously. In the dispersion step, the pigment mixture supplied to the dispersion device 110 at a predetermined supply amount from the dispersion supply opening 111 is continuously dispersed (kneaded) to obtain a pigment dispersion.

  In the returning step, the pigment dispersion continuously obtained in the dispersion step is continuously discharged (discharged) from the dispersion discharge opening 112 of the dispersion device 110 at the same flow rate (discharge amount) as the supply amount, and the tank supply opening The pigment dispersion is returned to the original tank body 20 by flowing from the section 24. In the return step, the first agitating blade 10, the second agitating blade 22, and the third agitating blade 15 in the tank main body 20 are continuously driven to rotate, and the contents accommodated in the tank main body 20 are continuously increased. Are mixed with stirring.

  A circulation process is a process performed continuously following a dispersion process and a return process. In the circulation step, the container accommodated in the tank body 20 in a state where the pigment dispersion obtained after the dispersion treatment in the returning process is returned to the tank body 20 is maintained at a temperature of 80 to 150 ° C. In a state where the viscosity is lowered, the mixture is circulated between the tank body 20 and the dispersion device 110, and the dispersion treatment in the dispersion device 110 is repeatedly performed until the particle diameter of the pigment becomes 5 μm or less to obtain a pigment dispersion. In the circulation process, the first agitating blade 10, the second agitating blade 22, and the third agitating blade 15 in the tank main body 20 are continuously driven to rotate, and the contents accommodated in the tank main body 20 are continuously maintained. Are mixed with stirring.

  Next, in the post-addition step, an oil component, an additive, and the like are added to the pigment dispersion obtained in the circulation step, and the mixture is stirred and mixed to obtain an offset printing ink composition. In addition, by adding oil components and additives so that the final offset printing ink composition is blended before the dispersion step, the pigment dispersion after the circulation step is used as it is for the offset printing ink. It can be used as a composition.

<Specific production example in the ninth usage example>
Below, although the specific example of manufacture of the ink composition for offset printing in the 9th usage example of the stirring apparatus 100 is demonstrated in detail, this invention is not limited only to these manufacture examples. The ink composition for offset printing was evaluated for residue rate, water content, Raleigh viscosity, tack value, coloring power, and printability. These evaluations followed the method described above. However, the evaluation of the coloring power was relatively evaluated with respect to the yellow offset printing ink composition of Production Examples 27, 31, 32, 33, and 35 and Reference Example 19, with the coloring power of Reference Example 15 being “100”. For the red offset printing ink compositions of Production Examples 28 and 34, the coloring power of Reference Example 16 was relatively evaluated as “100”, and for the indigo color offset printing ink composition of Production Example 29, Reference Example 17 Relative evaluation was performed with a coloring power of “100”, and the black offset printing ink composition of Production Example 30 was evaluated with a coloring power of Reference Example 18 of “100”.

(Production Example 27)
The ink composition for offset printing was manufactured using the stirring apparatus 100 shown in FIG. As for the size of the stirring apparatus 100 used in Production Example 27, “W1” is set to 210 mm, and “H1 + H2 + H3 + H4” is set to 350 mm. The stirring device 100 used in Production Example 27 is “W1” is 1800 mm, “W2” is 1150 mm, “H1” is 369 mm, “H2” is 807 mm, “H3” is 1303 mm, With respect to the stirring device in which “H4” is set to 287 mm and “H5” is set to 600 mm, it is 0.117 (210 mm / 1800 mm) times in the direction perpendicular to the central axis S, and 0.127 ( 350 mm / 2766 mm) times the size.

[Wet process]
In the tank body 20 of the stirring device 100, 9.85 parts by mass of dried pigment (Pigment Yellow 174) and 21 parts by mass of water were charged. The first stirring blade 10 and the third stirring blade 15 (the rotation diameter L4 is set to 52% with respect to the inner diameter of the tank body 20) are set so that the peripheral speed of the tip portion at the outermost peripheral portion is 13 m / s (536 rpm), respectively, and the second stirring blade 22 is driven to rotate so that the peripheral speed of the tip at the outermost peripheral edge is 1.0 m / s (10 rpm) (however, the second The rotation direction of the stirring blade 22 is opposite to the rotation direction of the first stirring blade 10 and the third stirring blade 15), and the stored contents in the tank body 20 are removed at a temperature of 70 ° C. for 5 minutes. The mixture was stirred and mixed to obtain a pigment water wet product.

[Transition process]
Next, 2.5 parts by weight of linseed oil, 15.93 parts by weight of soybean oil, 5 parts by weight of soybean oil fatty acid butyl ester, and AF-7 petroleum solvent (Shin Nippon) Petroleum Co., Ltd.) 14 parts by mass were added, and the first stirring blade 10 and the third stirring blade 15 were respectively rotated and driven so that the peripheral speed of the tip portion at the outermost peripheral edge portion was 13 m / s (536 rpm). The second stirring blade 22 is rotationally driven so that the peripheral speed of the tip portion at the outermost peripheral edge portion is 1.0 m / s (10 rpm) (however, the rotation direction of the second stirring blade 22 is the first stirring blade 22). 10 and the direction of rotation of the third stirring blade 15), and stirred and mixed at 70 ° C. for 5 minutes to transfer the pigment into the oil component to obtain a wet pigment oil component.

[Pigment mixture preparation process, dehydration process and gelation process]
Next, a liquid having a basic skeleton composed of 25.5 parts by mass of a rosin-modified phenolic resin (trade name: OR-357, manufactured by Seiko Polymer Co., Ltd.) in a lump state in the wetted pigment oil component in the tank body 20. Of soybean oil-modified alkyd resin (acid value 9 KOHmg / g) was added. Then, the tank body 20 is depressurized (pressure in the tank: about 244 mmHg (0.32 atm)), and the first stirring blade 10 and the third stirring blade 15 are moved at the peripheral speed of the tip portion at the outermost peripheral portion. Is driven to rotate so that the peripheral speed of the tip of the outermost peripheral edge is 1.0 m / s (10 rpm) (however, the rotational speed is 13 m / s (536 rpm)). The rotation direction of the second stirring blade 22 is opposite to the rotation direction of the first stirring blade 10 and the third stirring blade 15), and the water content is obtained while pulverizing the rosin-modified phenolic resin in a lump state. Was dehydrated until it became 2% by mass or less. And the heat stirring was continued and the resin component containing the grind | pulverized rosin modified phenol resin was dissolved in the oil component. Further, 0.54 parts by mass of aluminum chelate was added as a gelling agent to obtain a gelled pigment mixture.

[Meat meat process]
Next, the gelled pigment mixture in the tank body 20 is maintained at 130 ° C., and the peripheral speed of the tip of the first stirring blade 10 and the third stirring blade 15 at the outermost peripheral edge is 13 m / s (536 rpm). The second agitating blade 22 is rotationally driven so that the peripheral speed of the tip portion at the outermost peripheral edge is 1.0 m / s (10 rpm) (however, the second agitating blade 22 is rotated). The direction is the direction opposite to the rotation direction of the first stirring blade 10 and the third stirring blade 15), and the transport pump that is the supply device 120 is used to form the dynomill (manufactured by Shinmaruen Type Reises) that is the dispersion device 110. DYNO-MILL type KDL-PILOT 1.4L, steel beads: Φ1.5 mm), and a dispersion treatment was performed so as to satisfy the conditions shown in Table 10 to obtain a pigment dispersion. Then, the pigment dispersion is returned to the original tank body 20 by the supply device 120 and supplied to the dispersion device 110 repeatedly until the particle diameter of the pigment is 5 μm or less (the particle diameter is confirmed by a grindometer). A yellow pigment dispersion of Production Example 27 was obtained.

[Post-addition process]
Next, 13.07 parts by mass of soybean oil and 13.07 parts by mass of AF-7 petroleum solvent (manufactured by Nippon Oil Co., Ltd.) are added to the yellow pigment dispersion in the tank body 20 and mixed with stirring for 8 minutes. An ink composition for offset printing was obtained. In Production Example 27, when the oil component is added into the tank body 20 in the post-addition step, each raw material is placed in the tank body 20 so that the occupation ratio with respect to the entire internal space of the tank body 20 becomes 80%. Prepared.

(Production Example 28)
A red offset printing ink composition of Production Example 28 was obtained in the same manner as in Production Example 27 except that the pigment was changed to Pigment Red 57: 1.

(Production Example 29)
A deep blue ink composition for offset printing of Production Example 29 was obtained in the same manner as in Production Example 27 except that the pigment was changed to Pigment Blue 15: 3.

(Production Example 30)
A black offset printing ink composition of Production Example 30 was obtained in the same manner as in Production Example 27 except that the pigment was changed to carbon black.

(Production Example 31)
A pigment mixture gelled by the same method as in Production Example 27 was obtained, and this pigment mixture was supplied to a three-roll mill. Table 10 was used until the particle diameter of the pigment became 5 μm or less (the particle diameter was confirmed by a grindometer). The yellow pigment dispersion of Production Example 31 was obtained by kneading under the conditions described in 1. Next, the yellow pigment dispersion is transferred to the tank body 20, and 13.07 parts by mass of soybean oil and 13.07 parts by mass of AF-7 petroleum solvent (manufactured by Nippon Oil Co., Ltd.) are added and mixed by stirring. The ink composition for offset printing of Example 31 was obtained.

(Production Example 32)
A pigment mixture gelled by the same method as in Production Example 27 was obtained, and this pigment mixture was applied to Dynomill (manufactured by Shinmaruen Type Rise, DYNO-MILL type KDL-PILOT 1.4L, steel beads: Φ1.5 mm). Then, the circulation step was performed one pass under the conditions shown in Table 10 so that the particle diameter of the pigment was 5 μm or less, and the yellow pigment dispersion of Production Example 32 was obtained. Next, the yellow pigment dispersion is transferred to the tank body 20, and 13.07 parts by mass of soybean oil and 13.07 parts by mass of AF-7 petroleum solvent (manufactured by Nippon Oil Co., Ltd.) are added and mixed by stirring. The ink composition for offset printing of Example 32 was obtained.

(Production Example 33)
A yellow offset printing ink composition of Production Example 33 was obtained in the same manner as in Production Example 27 except that the supply temperature of the gelled pigment mixture in the dispersion step was changed to 90 ° C.

(Production Example 34)
The red offset printing ink composition of Production Example 34 by the same method as Production Example 28, except that the supply temperature of the gelled pigment mixture in the dispersion step and the discharge temperature of the pigment mixture in the return step were changed to 90 ° C. Got.

(Production Example 35)
The ink composition for offset printing was manufactured using the stirring apparatus 100 shown in FIG. As for the size of the stirring apparatus 100 used in Production Example 35, “W1” is set to 210 mm, and “H1 + H2 + H3 + H4” is set to 350 mm. The stirring device 100 used in Production Example 35 is “W1” 1800 mm, “W2” 1150 mm, “H1” 369 mm, “H2” 807 mm, “H3” 1303 mm, With respect to the stirring device in which “H4” is set to 287 mm and “H5” is set to 600 mm, it is 0.117 (210 mm / 1800 mm) times in the direction perpendicular to the central axis S, and 0.127 ( 350 mm / 2766 mm) times the size.

[Wet process]
In the tank body 20 of the stirring device 100, 9.85 parts by mass of dried pigment (Pigment Yellow 174) and 21 parts by mass of water were charged. The first stirring blade 10 and the third stirring blade 15 (the rotation diameter L4 is set to 52% with respect to the inner diameter of the tank body 20) are set so that the peripheral speed of the tip portion at the outermost peripheral portion is 13 m / s (536 rpm), respectively, and the second stirring blade 22 is driven to rotate so that the peripheral speed of the tip at the outermost peripheral edge is 1.0 m / s (10 rpm) (however, the second The rotation direction of the stirring blade 22 is opposite to the rotation direction of the first stirring blade 10 and the third stirring blade 15), and the stored contents in the tank body 20 are removed at a temperature of 70 ° C. for 5 minutes. The mixture was stirred and mixed to obtain a pigment water wet product.

[Transition process]
Next, 2.5 parts by weight of linseed oil, 15.93 parts by weight of soybean oil, 5 parts by weight of soybean oil fatty acid butyl ester, and AF-7 petroleum solvent (Shin Nippon) Petroleum Co., Ltd.) 14 parts by mass were added, and the first stirring blade 10 and the third stirring blade 15 were respectively rotated and driven so that the peripheral speed of the tip portion at the outermost peripheral edge portion was 13 m / s (536 rpm). The second stirring blade 22 is rotationally driven so that the peripheral speed of the tip portion at the outermost peripheral edge portion is 1.0 m / s (10 rpm) (however, the rotation direction of the second stirring blade 22 is the first stirring blade 22). 10 and the direction of rotation of the third stirring blade 15), and stirred and mixed at 70 ° C. for 5 minutes to transfer the pigment into the oil component to obtain a wet pigment oil component.

[Dehydration process]
Next, the pressure in the tank body 20 is reduced (pressure in the tank: about 244 mmHg (0.32 atm)), and the wet pigment oil component is dehydrated under heating and reduced pressure until the water content becomes 2% by mass or less. To obtain a dehydrated product.

[Pigment mixture preparation step and gelation step]
Liquid soybean oil-modified alkyd having a basic skeleton composed of 25.5 parts by mass of rosin-modified phenolic resin (manufactured by Seiko Polymer Co., Ltd., trade name: OR-357) and dehydrated product in tank body 20 0.53 parts by mass of a resin (acid value: 9 KOH mg / g) was added. Then, the first stirring blade 10 and the third stirring blade 15 are respectively driven to rotate so that the peripheral speed of the tip portion at the outermost peripheral edge portion is 13 m / s (536 rpm), and the second stirring blade 22 is moved to the outermost periphery. Rotation drive so that the peripheral speed of the tip at the peripheral edge is 1.0 m / s (10 rpm) (however, the rotation direction of the second stirring blade 22 is the rotation direction of the first stirring blade 10 and the third stirring blade 15) The resin component containing the pulverized rosin-modified phenol resin was dissolved in the oil component at 130 ° C. while pulverizing the rosin-modified phenol resin in a lump state. Further, 0.54 parts by mass of aluminum chelate was added as a gelling agent to obtain a gelled pigment mixture.

[Meat meat process]
The gelled pigment mixture in the tank body 20 is maintained at 130 ° C., and the peripheral speed of the tip of the first stirring blade 10 and the third stirring blade 15 at the outermost peripheral edge is 13 m / s (536 rpm). And the second stirring blade 22 is driven to rotate so that the peripheral speed of the tip portion at the outermost peripheral edge portion is 1.0 m / s (10 rpm) (however, the rotation direction of the second stirring blade 22 is In the state where the first agitating blade 10 and the third agitating blade 15 are rotated in the opposite direction), a dynomill (manufactured by Shinmaruen type Reises, DYNO -MILL type KDL-PILOT 1.4L, steel beads: Φ1.5 mm) and subjected to a dispersion treatment so as to satisfy the conditions shown in Table 10 to obtain a pigment dispersion. Thereafter, the pigment dispersion is returned to the original tank body 20 by the supply device 120 and supplied to the dispersion device 110 repeatedly until the particle diameter of the pigment is 5 μm or less (the particle diameter is confirmed by a grindometer). A yellow pigment dispersion of Production Example 35 was obtained.

[Post-addition process]
Next, 13.07 parts by mass of soybean oil and 13.07 parts by mass of AF-7 petroleum solvent (manufactured by Nippon Oil Co., Ltd.) are added to the yellow pigment dispersion in the tank body 20 and mixed with stirring for 8 minutes. An ink composition for offset printing was obtained. In Production Example 35, when the oil component is added into the tank body 20 in the post-addition step, each raw material is placed in the tank body 20 so that the occupation ratio with respect to the entire internal space of the tank body 20 becomes 80%. Prepared.

(Reference Example 15)
In Reference Example 15, an ink composition for offset printing was produced without using the stirring device 100. In Reference Example 15, a “varnish preparation step” and a “gelation step” using a stirrer in which a conventional cutter blade (disc turbine blade) is installed in a bottomed cylindrical tank having a height of 250 mm and an inner diameter of 210 mm. And the “premixing step”, the subsequent “dispersing step” supplies the pigment mixture obtained by the stirring device to a three-roll mill, and the “post-addition step” further disperses the pigment obtained by the three-roll mill. The body was transferred to the stirring device to produce an ink composition for offset printing.

[Varnish preparation process]
In the tank, as oil components, linseed oil 2.5 parts by mass, soybean oil 15.93 parts by mass, soybean oil fatty acid butyl ester 5 parts by mass, AF-7 petroleum solvent (manufactured by Nippon Oil Corporation), 14 parts by mass, As a resin component, 25.5 parts by mass of a rosin-modified phenol resin (trade name: OR-357, manufactured by Seiko Polymer Co., Ltd.), a liquid soybean oil-modified alkyd resin (acid value: 9 KOHmg) having a basic skeleton composed of isophthalic acid / G) 0.53 parts by mass were charged. Then, the disk turbine blade was rotationally driven so that the peripheral speed of the tip portion at the outermost peripheral edge portion was 13 m / s, and stirred and mixed at 200 ° C. for 40 minutes to dissolve the rosin-modified phenolic resin in a lump state.

[Gelification process]
Next, 0.54 parts by mass of aluminum chelate was added as a gelling agent in the tank, and a reaction varnish was obtained at 130 ° C. for 30 minutes to obtain a resin varnish.

[Premixing process]
Next, 9.85 parts by mass of the dried pigment (Pigment Yellow 174) was added to the resin varnish in the tank, and the mixture was stirred and mixed at 70 ° C. for 30 minutes to perform premixing.

[Dispersing process]
Next, the pre-mixed pigment mixture in the tank was supplied to a three-roll mill, and kneaded until the particle diameter of the pigment became 5 μm or less (the particle diameter was confirmed by a grindometer) under the conditions shown in Table 11. The yellow pigment dispersion of Example 15 was obtained.

[Post-addition process]
Next, the yellow pigment dispersion was transferred to a tank, and 13.07 parts by mass of soybean oil and 13.07 parts by mass of AF-7 petroleum solvent (manufactured by Nippon Oil Corporation) were added and mixed by stirring. Reference Example 15 The ink composition for offset printing was obtained.

(Reference Example 16)
A red offset printing ink composition of Reference Example 16 was obtained in the same manner as in Reference Example 15 except that the pigment was changed to Pigment Red 57: 1.

(Reference Example 17)
A deep blue ink composition for offset printing of Reference Example 17 was obtained in the same manner as in Reference Example 15 except that the pigment was changed to Pigment Blue 15: 3.

(Reference Example 18)
A black offset printing ink composition of Reference Example 18 was obtained in the same manner as in Reference Example 15 except that the pigment was changed to carbon black.

(Reference Example 19)
In the same manner as in Reference Example 15, a premixed mixture was obtained. Supply the mixture after premixing in the tank to DYNO-MILL (DYNO-MILL type KDL-PILOT 1.4L, steel beads: Φ1.5mm, manufactured by Shinmaruen Rizesu Co., Ltd.) until the pigment particle size becomes 5μm or less The circulation step was performed for 2 passes under the conditions described in Table 11 to obtain a yellow pigment dispersion of Reference Example 19. Next, the yellow pigment dispersion was transferred to a tank, and 13.07 parts by mass of soybean oil and 13.07 parts by mass of AF-7 petroleum solvent (manufactured by Nippon Oil Corporation) were added and mixed by stirring. The ink composition for offset printing was obtained.

  Table 10 shows the evaluation results of the ink compositions for offset printing of Production Examples 27 to 35, and Table 11 shows the evaluation results of the ink compositions for offset printing of Reference Examples 15 to 19.

  As shown in Tables 10 and 11, Production Examples 27 to 30 and 33 to 35 can obtain a final ink composition for offset printing with a single stirring device 100. In addition, while the production examples 27 to 35 were maintained in a state where the ink characteristics such as the tack value and the coloring power and the printability were high, the total required time required for the production was shortened compared to the reference examples 15 to 19. I understand.

<10th usage example>
As a 10th usage example of the stirring apparatus 100 of this embodiment, the usage example at the time of manufacture of the ink composition for offset printing can be mentioned. The manufacturing method of the ink composition for offset printing in the 10th usage example of the stirring apparatus 100 is performed using the manufacturing system 2 shown in FIG. 4, and includes a premixing process and a kneading process.

  In the premixing step, the bead carbon black is dispersed in the resin varnish using the stirring device 100 of the present embodiment to obtain a carbon black dispersed varnish. The stirrer 100 of the present embodiment is a device that can sufficiently knead and disperse the agitated material while imparting a shearing force to the agitated material while sufficiently applying a stirring flow to the agitated material. Therefore, even a highly viscous resin varnish can be pulverized and easily finely dispersed.

  The stirring and mixing time required to disperse the bead carbon black in the resin varnish has optimum conditions depending on the composition of the resin varnish and the rotation speeds of the first stirring blade 10, the second stirring blade 22, and the third stirring blade 15. The stirring and mixing time to be set varies depending on the optimum conditions. The stirring and mixing time is 30 to 120 minutes as one guide when considering energy efficiency and workability.

  Examples of resin varnishes include those in which rosin-modified phenolic resin is dissolved in soybean oil and mineral oil component materials, and those in which gilsonite resin is dissolved in mineral oil component materials. Can be used. The amount of the oil component charged in the production of the resin varnish is preferably 100 to 180% by mass, and particularly preferably 120 to 150% by mass, based on the amount of the solid resin charged. Thereby, a resin varnish having a viscosity within a suitable range can be obtained.

Further, the bead carbon black is a carbon black made into a bead shape by granulating fine powder powder carbon black. As the bead carbon black, acidic or neutral bead carbon black can be used. The bulk density is 0.2 to 0.8 g / cm ³ and the average primary particle size is 15 to 70 nm. The bulk density of bead carbon black is a value obtained by measurement by a measurement method according to JIS K6219-2: 2005. The average primary particle diameter of bead carbon black is an arithmetic average value of particle diameters obtained by observation with an electron microscope.

  The acidic bead carbon black is carbon black having a pH of 2.0 to 6.0, and a bead carbon black whose surface is oxidized with ozone or chemicals can be used. Even if it is not subjected to such special oxidation treatment, it can be used even if it is naturally oxidized. There are various production methods by oxidation treatment, and the main production methods include the furnace method and the Degussa gas black method by Degussa.

  The neutral bead carbon black is a carbon black having a pH of 6.0 to 8.0, and is obtained by granulating carbon black produced by a channel method, an oil furnace method, or the like.

  There are two methods for producing neutral bead carbon black: a wet method in which water is added and a dry method in which water is not added. In many cases, it is a wet method, and the bead carbon black produced by the wet method also finally removes moisture completely in a subsequent process. Carbon black is produced from a catalytically cracked heavy oil component of tar or petroleum, which is a polycyclic aromatic, in a reaction furnace at 1,300 to 1,800 ° C. The generated carbon black is immediately in the form of agglomerate. In the wet method, the collected carbon is put into a granulator, water is added to form particles with a predetermined particle size, and then dried to remove moisture. To do.

  As the neutral bead carbon black, for example, if carbon black is granulated such as tire grades N326, N330, N220, N550, N568, N660, N762, N754, a bead carbon black equivalent for color is used. Can be used.

  In the premixing step, a stirring device 100 that can sufficiently apply a shearing force to the stirring object, impart shear force to the stirring object, and sufficiently knead and disperse the stirring object is used. Therefore, a sufficient shearing force is applied to the bead carbon black accommodated in the tank body 20, and the bead carbon black can be dispersed while being pulverized in the resin varnish. Therefore, even granular carbon black such as bead carbon black can be easily finely dispersed in the resin varnish, and a highly dispersible carbon black dispersion varnish can be obtained.

  Next, in the kneading process, the carbon black dispersion varnish obtained in the premixing process is kneaded with a fine pulverizer to further improve the dispersibility of the carbon black, thereby obtaining an ink composition for offset printing. In this kneading process, the contents stored in the tank body 20 can be circulated between the tank body 20 and the pulverizer and repeatedly kneaded.

  As described above, in the present embodiment, since bead carbon black can be easily finely dispersed in the resin varnish in the premixing step, productivity can be improved even when bead carbon black is used. The offset printing ink composition thus obtained can be obtained in the same quality as the ink composition for offset printing using powder carbon black, such as gloss and jetness. In addition, since no powder carbon black is used, no dust is generated and a good working environment can be realized.

<Specific Manufacturing Example in Tenth Usage Example>
Below, although the specific example of manufacture of the ink composition for offset printing in the 10th usage example of the stirring apparatus 100 is demonstrated in detail, this invention is not limited only to these examples of manufacture. The ink composition for offset printing was evaluated for pigment dispersibility, suitability for a mono pump, residual amount, and viscosity.

<Pigment dispersibility>
The carbon black dispersion varnish at the end of the premixing process was allowed to stand at room temperature for 24 hours, and the state of pigment precipitation was visually confirmed. The evaluation criteria are as follows.
○: No pigment settling ×: Pigment settling

<Mono pump suitability>
The carbon black dispersion varnish at the end of the premixing step was passed through a MONO pump (manufactured by MITSUBISHI ELECTRIC CORPORATION) to confirm the presence or absence of piping blockage. At that time, the initial pressure at the pump outlet was set to 0.1 MPa, and the pressure at the time of transportation was also measured. The evaluation criteria are as follows.
○: No piping blockage ×: Piping blockage

<Amount of residue>
The carbon black dispersion varnish at the end of the premixing process and the offset printing ink composition at the end of the kneading process were each dissolved in 100 g toluene, and the amount of residue when the carbon black dispersion varnish was filtered through 100 mesh was offset. About the printing ink composition, the weight of the residue when it filtered with 400 mesh was measured as a residue amount, respectively.

<Particle size measurement>
About the ink composition for offset printing, using a grindometer (manufactured by Yasuda Seiki Seisakusho Co., Ltd.), according to JIS K5701-1: 2000 kneading degree measuring method, a continuous line of 10 mm or more generated by moving the scraper The position of the scale when three or more of the grooves appeared for one groove was measured as an A value, and the position of the scale when 10 or more of the grooves appeared was measured as a B value.

(Production Example 36)
In Production Example 36, first, a resin varnish and a gilsonite varnish were prepared. Rosin-modified phenolic resin (weight average molecular weight 10,000), soybean oil, and AF solvent No. 6 (mineral oil component, manufactured by Shin Nippon Petrochemical Co., Ltd.) are mixed so that the mass ratio is 40:25:35. Thus, a resin varnish in which the rosin-modified phenol resin was dissolved in the oil component material was obtained. Also, Gilsonite Selects 325 (Gilsonite resin, manufactured by American Gilsonite) and AF Solvent No. 6 (mineral oil component, manufactured by Nippon Oil & Petrochemical Co., Ltd.) were mixed so that the mass ratio was 20:80, and the oil component A gilsonite varnish in which a gilsonite resin was dissolved was obtained.

  In Production Example 36, an ink composition for offset printing was produced using the stirring device 100 shown in FIG. As for the size of the stirring apparatus 100 used in Production Example 36, “W1” is set to 210 mm, and “H1 + H2 + H3 + H4” is set to 350 mm. The stirrer 100 used in Production Example 36 is “W1” is 1800 mm, “W2” is 1150 mm, “H1” is 369 mm, “H2” is 807 mm, “H3” is 1303 mm, With respect to the stirring device in which “H4” is set to 287 mm and “H5” is set to 600 mm, it is 0.117 (210 mm / 1800 mm) times in the direction perpendicular to the central axis S, and 0.127 ( 350 mm / 2766 mm) times the size.

[Premixing process]
In the tank body 20 of the stirring apparatus 100, 20 parts by mass of neutral bead carbon black (N326, manufactured by Degussa) having a primary particle diameter of 30 nm and a bulk density of 0.46 g / cm ³ , 45 parts by mass of a resin varnish, and 10 gyrsonite varnish 10 Mass parts and 25 parts by mass of soybean oil were charged so that the occupation ratio with respect to the entire internal space of the tank body 20 was 80%. The first agitation blade 10 and the third agitation blade 15 (the rotation diameter L4 is set to 60% of the inner diameter of the tank body 20) and the peripheral speed of the tip portion at the outermost peripheral edge portion is 9. 7 m / s (400 rpm), respectively, and the second stirring blade 22 is rotationally driven so that the peripheral speed of the tip at the outermost peripheral edge is 1.0 m / s (10 rpm) (however, The rotation direction of the second stirring blade 22 is opposite to the rotation direction of the first stirring blade 10 and the third stirring blade 15) and the mixture is stirred for 48 minutes to finely disperse the neutral bead carbon black in the varnish. It was. At this time, the viscosity of the mixture of varnish and bead carbon black is 120 Pa · s, and the temperature of the mixture at the start of the premixing process is 60 ° C.

[Meat meat process]
The obtained carbon black dispersion varnish was put into a Dynomill (Netzsch-Feinhahltechnik, GmbH), the bead type was steel beads, the bead diameter was 1.5 mm, the bead filling rate was 60%, and the rotor rotation speed was 1400 rpm. Kneading was performed at an amount of 5.3 kg / h, and an ink composition for offset printing of Production Example 36 was obtained.

(Production Example 37)
An ink composition for offset printing according to the production method of Production Example 37 was obtained in the same manner as Production Example 36 except that the premixing time was changed from 60 minutes to 140 minutes.

(Production Example 38)
An ink composition for offset printing according to the production method of Production Example 38 was obtained in the same manner as Production Example 36 except that the rotation speeds of the first stirring blade 10 and the third stirring blade 15 were changed from 400 rpm to 1000 rpm.

(Production Example 39)
Production method of Production Example 39 in the same manner as Production Example 36 except that the premixing time was changed from 60 minutes to 140 minutes and the rotation speeds of the first stirring blade 10 and the third stirring blade 15 were changed from 400 rpm to 1000 rpm. An ink composition for offset printing was obtained.

(Reference Example 20)
In Reference Example 20, an ink composition for offset printing was produced without using the stirring device 100. In Reference Example 20, an ink composition for offset printing was produced using a stirrer in which a conventional cutter blade (disc turbine blade) was installed in a bottomed cylindrical tank having a height of 250 mm and an inner diameter of 210 mm. Premixing was performed in the same manner as in Production Example 36 except that such a stirring device was used. However, clogging occurred in the MONO pump for transporting to DYNOMILL, so that the subsequent kneading process by DYNOMILL could not be performed, and an offset printing ink composition could not be obtained.

(Reference Example 21)
Premixing was performed in the same manner as in Reference Example 20 except that the premixing time was changed from 60 minutes to 120 minutes. However, clogging occurred in the MONO pump for transporting to DYNOMILL, so that the subsequent kneading process by DYNOMILL could not be performed, and an offset printing ink composition could not be obtained.

(Reference Example 22)
Premixing was performed in the same manner as in Reference Example 20 except that the premixing time was changed from 60 minutes to 180 minutes. However, clogging occurred in the MONO pump for transporting to DYNOMILL, so that the subsequent kneading process by DYNOMILL could not be performed, and an offset printing ink composition could not be obtained.

(Reference Example 23)
Premixing was performed in the same manner as in Reference Example 20, except that the premixing time was changed from 60 minutes to 180 minutes and the rotational speed of the disk turbine blades was changed from 400 rpm to 1000 rpm. However, clogging occurred in the MONO pump for transporting to DYNOMILL, so that the subsequent kneading process by DYNOMILL could not be performed, and an offset printing ink composition could not be obtained.

(Reference Example 24)
Premixing was performed in the same manner as in Reference Example 20 except that neutral bead carbon black was changed to powder carbon black (primary particle diameter: 24 nm), and an ink composition for offset printing according to the production method of Reference Example 24 was obtained.

  For Production Examples 36 to 39 and Reference Examples 20 to 24, the pigment dispersibility at the end of the premixing process, the amount of residue, and the suitability of the monopump were evaluated, and the amount of residue at the end of the kneading process and the particle size by a grindometer were evaluated. The evaluation results are shown in Table 12.

  Production Examples 36 to 39 had good pigment dispersibility at the end of the premixing step, and the amount of residue in Production Examples 36 to 39 was smaller than that in Reference Example 24 using powder carbon black. Further, even in the ink composition for offset printing at the end of the kneading process, the amount of residue in Production Examples 36 to 39 was smaller than that in Reference Example 24. Regarding the particle size, Production Example 36 was almost the same as Reference Example 24, and Production Examples 37 to 39 were smaller than Reference Example 24. In Reference Examples 20 to 23, pigment dispersibility was poor and pigment precipitation was observed at the end of the premixing step. It can also be seen that the amount of residue is very large and carbon black is not sufficiently dispersed. Thus, since the dispersibility of carbon black was poor, clogging of piping occurred with the MONO pump, and transportation to the DYNOMILL could not be performed, and the kneading process could not be performed.

<Eleventh use case>
As an eleventh usage example of the stirrer 100 of the present embodiment, there can be mentioned a usage example in the production of a kaolin pigment base for oil-based printing using a surface treatment agent of a kaolin pigment which is an extender pigment. The kaolin pigment-based production method for oil-based printing in the eleventh use example of the stirring device 100 includes a surface treatment process, a transition process, a dehydration process, and a stirring process.

  In the surface treatment process, the kaolin pigment, the aqueous medium, and the surface treatment agent, which are extender pigments, are charged into the tank body 20, and the tank body 20 is heated to 25 to 100 ° C. By rotating and driving the second stirring blade 22 and the third stirring blade 15 for about 5 to 120 minutes, the surface treatment agent acts on the surface of the kaolin pigment, such as reaction and adsorption, so that the surface treatment of the kaolin pigment is performed.

  As kaolin pigments, there are usually those called wet kaolin pigments, calcined kaolin pigments, and dry kaolin pigments depending on the purification method, and any of them can be used. Among them, kaolin pigments that are not coated with a surface treatment are preferred.

  As the surface treatment agent, an aliphatic amine, an aliphatic amine salt, or a silane coupling agent having an amino group can be used. These can also be used independently and can also use 2 or more types together. The usage-amount of a surface treating agent is 0.5-10 mass parts normally with respect to 100 mass parts of kaolin pigments before surface treatment.

  As the aqueous medium, water is usually used. It does not specifically limit as water to be used, Tap water, well water, ion-exchange water, distilled water, etc. can be used.

  Next, varnish for oily printing (solid resin is dissolved in vegetable oil component and / or mineral oil component, and solid resin and vegetable oil component and / or mineral oil component constituting oily varnish for printing are used as they are. In the tank body 20, and the first stirring blade 10, the second stirring blade 22 and the third stirring blade 15 are rotationally driven and stirred and mixed at a temperature of 50 to 150 ° C. The surface-treated kaolin pigment in the surface-treated kaolin pigment is transferred into the oil component to obtain a kaolin pigment dispersion.

  Next, in the dewatering step, the inside of the tank body 20 is depressurized by the depressurizing and dehydrating means 30, and the first stirring blade 10, the second stirring blade 22 and the third stirring blade 15 are rotationally driven, and the kaolin pigment dispersion is made 65-100. By stirring and mixing at a temperature of 0 ° C., dehydration is performed until the water content of the kaolin pigment dispersion becomes 2% by mass or less.

  The pigment dispersion in the tank body 20 in the dehydration step is dehydrated under conditions of a pressure of 31.8 to 760 mmHg at which the temperature is about 65 to 100 ° C.

  Next, in the stirring step, the dehydrated product obtained in the dehydrating step is driven to rotate the first stirring blade 10, the second stirring blade 22, and the third stirring blade 15, and the dehydrated product is at a temperature of 100 to 140 ° C. The kaolin pigment base for oil-based printing is obtained by stirring and mixing for about 1 hour.

<Specific production example in 11th usage example>
Hereinafter, specific examples of extender pigment-based production, which is an intermediate for producing an ink composition for offset printing, in the eleventh use example of the stirring device 100 will be described in detail, but the present invention is limited to these production examples. It is not limited.

(Production Example 40)
In Production Example 40, an oil-based printing varnish was first prepared. Rosin-modified phenolic resin (weight average molecular weight 10,000), soybean oil, and AF solvent No. 6 (mineral oil component, manufactured by Shin Nippon Petrochemical Co., Ltd.) are mixed so that the mass ratio is 40:25:35. Thus, an oily printing varnish in which the rosin-modified phenolic resin was dissolved in the oil component was obtained.

  Moreover, in the manufacture example 40, the ink composition for offset printing was manufactured using the stirring apparatus 100 shown in FIG. As for the size of the stirring apparatus 100 used in Production Example 40, “W1” is set to 210 mm, and “H1 + H2 + H3 + H4” is set to 350 mm. The stirrer 100 used in Production Example 40 is “W1” of 1800 mm, “W2” of 1150 mm, “H1” of 369 mm, “H2” of 807 mm, “H3” of 1303 mm, With respect to the stirring device in which “H4” is set to 287 mm and “H5” is set to 600 mm, it is 0.117 (210 mm / 1800 mm) times in the direction perpendicular to the central axis S, and 0.127 ( 350 mm / 2766 mm) times the size.

[Surface treatment process]
In the tank main body 20 of the stirring device 100, 50 parts by mass of kaolin pigment, 50 parts by mass of water, and 2.0 parts by mass of laurylamine which were not surface-treated were charged. The first agitation blade 10 and the third agitation blade 15 (the rotation diameter L4 is set to 35% of the inner diameter of the tank body 20) and the peripheral speed of the tip at the outermost peripheral edge are 9. 7 m / s (400 rpm), respectively, and the second stirring blade 22 is rotationally driven so that the peripheral speed of the tip at the outermost peripheral edge is 1.0 m / s (10 rpm) (however, The rotation direction of the second stirring blade 22 was opposite to the rotation direction of the first stirring blade 10 and the third stirring blade 15), and the mixture was stirred at 70 ° C. for 60 minutes to perform surface treatment of the kaolin pigment.

[Transition process]
100 mass parts of oil-based printing varnish is added to the surface-treated material, and the peripheral speed of the first stirring blade 10 and the third stirring blade 15 is 19.4 m / s (800 rpm) at the outermost peripheral edge. The second agitating blade 22 is rotationally driven so that the peripheral speed of the tip portion at the outermost peripheral edge is 1.0 m / s (10 rpm) (however, the second agitating blade 22 is rotated). The direction is opposite to the direction of rotation of the first stirring blade 10 and the third stirring blade 15), and the mixture was stirred at 70 ° C. for 30 minutes for flushing, and the surface treatment was performed in an aqueous mixture of the surface-treated kaolin pigment. The kaolin pigment was transferred into the oil component varnish.

[Dehydration process]
Next, the inside of the tank body 20 is decompressed to 130 mmHg by the vacuum dehydrating means 30, and the peripheral speed of the first stirring blade 10 and the third stirring blade 15 at the outermost peripheral edge is 19.4 m / s (800 rpm). The second agitating blade 22 is rotationally driven so that the peripheral speed of the tip portion at the outermost peripheral edge is 1.0 m / s (10 rpm) (however, the second agitating blade 22 is rotated). The direction is opposite to the rotation direction of the first stirring blade 10 and the third stirring blade 15) and is stirred and mixed at a temperature of 80 ° C., thereby dehydrating until the water content becomes 2% by mass or less, A kaolin pigment mixture for oily printing was obtained.

[Stirring step]
Thereafter, the first stirring blade 10 and the third stirring blade 15 are respectively rotated and driven so that the peripheral speed of the tip portion at the outermost peripheral edge portion is 19.4 m / s (800 rpm), and the second stirring blade 22 is Rotation drive so that the peripheral speed of the tip at the outermost peripheral edge is 1.0 m / s (10 rpm) (however, the rotation direction of the second stirring blade 22 is the same as that of the first stirring blade 10 and the third stirring blade 15). The mixture was stirred and mixed at 120 ° C. for 60 minutes to obtain a kaolin pigment base for oil-based printing. When the dispersibility of the oil-based kaolin pigment for printing was measured with a grindometer, the particle diameter of the surface-treated kaolin pigment was 5 μm or less.

(Reference Example 25)
In Reference Example 25, an ink composition for offset printing was produced without using the stirring device 100. In Reference Example 25, an ink composition for offset printing was produced using a flasher, a stirrer, and a three-roll mill.

[Surface treatment process]
A flasher (kneader) was charged with 50 parts by weight of kaolin pigment, 50 parts by weight of water and 2.0 parts by weight of laurylamine, and stirred at 70 ° C. for 60 minutes to effect surface treatment of the kaolin pigment.

[Transition process]
100 parts by mass of varnish for oil-based printing is added to the material after the surface treatment, followed by flushing at 70 ° C. for 40 minutes, and the surface-treated kaolin pigment in the aqueous mixture of the surface-treated kaolin pigment is transferred to the varnish which is an oil component. I let you.

[Dehydration process]
Thereafter, the leached water is removed by tilting the main body, and further, the inside of the flasher is depressurized (pressure in the flasher: 130 mmHg) and the temperature is set to 57 ° C., so that the water content becomes 2% by mass or less. A kaolin pigment mixture for oil-based printing was obtained.

[Stirring step]
Thereafter, the kaolin pigment mixture for oil-based printing after dehydration was stirred and mixed using a stirring device. The stirring device used in Reference Example 25 is a device in which conventional cutter blades (disc turbine blades) are installed in a bottomed cylindrical tank having a height of 250 mm and an inner diameter of 210 mm. In the stirring step, the kaolin pigment mixture for oily printing after dehydration is moved from the flasher to the tank, the disk turbine blade is driven to rotate, and the kaolin pigment mixture for oily printing after dehydration is stirred and mixed at 120 ° C. for 60 minutes, A kaolin pigment base for oil-based printing was produced. However, when the dispersibility of the obtained kaolin pigment for oil-based printing was measured with a grind gauge, the particle diameter of the surface-treated kaolin pigment was 12.5 μm or less.

[Kneading process]
Thereafter, the kaolin pigment base for oil-based printing is further dispersed by kneading until a particle size of 5 μm or less is measured by a grindometer using a three-roll mill (manufactured by Inoue Kikai) at 45 ° C. Got.

  With respect to the kaolin pigment base for oil-based printing of Production Example 40, it is possible to obtain an extender pigment base that is an intermediate for producing an ink composition for offset printing with a single stirring device 100 as compared to Reference Example 25. It can be simplified.

  In the first to eleventh usage examples described above, the example in which the stirring device 100 including the first stirring blade 10, the second stirring blade 22, and the third stirring blade 15 is used is shown, but the configuration is limited to this configuration. The first to eleventh use examples are not provided, and the third stirring blade 15 is not provided and the stirring device 100 including the first stirring blade 10 and the second stirring blade 22 is used. The effect shown by can be exhibited. Further, the number of stirring blades is not limited, and stirring blades formed in the same shape as the first stirring blade 10 and the third stirring blade 15 are provided on the first rotating shaft 26 and the second rotating shaft 27. Alternatively, they may be arranged side by side in the axial direction.

DESCRIPTION OF SYMBOLS 1 Manufacturing system 10 1st stirring blade 11 Base 12 1st blade 13 2nd blade 14 3rd blade 15 3rd stirring blade 20 Tank main body 21 Tank cover body 22 2nd stirring blade 25 Heating means 26 1st rotating shaft 27 2nd Rotating shaft 28 Driving means 30 Depressurizing and dehydrating means 100 Stirring device 110 Dispersing device 120 Feeding device 201 Bottom portion 202 Side wall portion 2021 First wall portion 2022 Second wall portion

Claims (10)

A stirrer used for producing an offset printing ink composition comprising an ink material mainly comprising a pigment, a resin component, and an oil component, or a production intermediate of the offset printing ink composition. ,
A bottomed cylindrical tank main body that is formed by a cylindrical side wall portion that is continuous with the bottom portion, and that contains an object to be stirred that is at least a part of the ink material;
A tank lid body detachably provided at an end portion of the side wall portion opposite to the side continuous with the bottom portion;
Heating means provided facing the bottom and the side wall from the outside;
First and second rotation shafts that are inserted through the tank lid and rotate independently of each other around a central axis of the tank body;
A first agitating blade fixed to the first rotating shaft and provided in a non-contact state with respect to the bottom and the side wall in the tank body;
A second stirring blade fixed to the second rotating shaft and provided in contact with the bottom and the side wall in the tank body;
Drive means for driving the first and second rotating shafts to rotate independently of each other, and driving means for rotating the first rotating shaft at a higher speed than the second rotating shaft. Stirring device. The second rotating shaft is formed in a cylindrical shape,
2. The stirring device according to claim 1, wherein the first rotation shaft is inserted through the second rotation shaft and extends from one axial end portion of the second rotation shaft toward the bottom portion. The side wall portion is
A first wall portion that is continuous with the bottom portion and is inclined with respect to the central axis line so as to move away from the central axis line as the distance from the bottom portion increases;
The stirring device according to claim 1, further comprising: a second wall portion that is continuous with the first wall portion and is parallel to the central axis.   A third agitating blade fixed to the first rotating shaft or the second rotating shaft and provided in a non-contact state with respect to the bottom portion and the side wall portion in the tank body, with respect to a direction in which the central axis extends. The stirring device according to any one of claims 1 to 3, further comprising a third stirring blade provided apart from the first stirring blade.   The stirring device according to any one of claims 1 to 4, wherein the driving means rotates the first and second rotating shafts in directions opposite to each other.   The pressure reduction dehydration part which depressurizes the inside of the tank main body in the state where the tank lid was installed, and dehydrates water from a thing to be stirred is further provided. Stirring device.   The first stirring blade includes a disk-like base portion fixed perpendicularly to the first rotation shaft, and a blade continuous radially outward from the base portion. The stirring apparatus as described in any one. The blade is
A first blade that is inclined so as to be separated from one side with respect to a virtual plane including the surface of the base as it goes radially outward from the base,
A second blade that is inclined so as to be separated from the virtual plane toward the other side as it goes radially outward from the base portion;
The stirring device according to claim 7, further comprising: a third blade that extends radially outward from the base and extends along the virtual plane.   The first and second blades are bent at a position inclined inward in the radial direction of the base portion from the upstream side in the rotational direction toward the downstream side in the rotational direction, and are connected to the base portion. The stirring apparatus according to 8.   The stirrer according to claim 8 or 9, wherein an edge of the first, second, and third blades facing toward the downstream side in the rotational direction is formed in a tapered shape so as to face the downstream side in the rotational direction. .

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