JP2017186435A - Manufacturing method of pattern coating composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method of a pattern coating composition capable of manufacturing a pattern coating composition at good productivity.SOLUTION: There is provided a manufacturing method of a pattern coating composition containing a gelatinized article by gelatinizing a surface of a coloring coating, including the steps for: bringing the coloring coating into contact with a dispersant containing a gelatinizer and gelatinizing the surface of the coloring coating; and fracturing the coloring coating the surface of which is gelatinized by fracture means 10 having a fracture chamber 11 and a fracture mechanism 12 equipped with a rotary blade 14 on a tip of rotation shaft 13 extending from a bottom surface 11a or a side surface 11b of the fracture chamber 11 into the fracture chamber 11.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for producing a pattern coating composition.

The surface of an object such as a wall material is often painted for the purpose of protection or decoration. Conventionally, in order to obtain a paint having a desired color tone, an inorganic or organic pigment is dispersed in advance in a resin solution or resin emulsion for paint, and several kinds of paints having different colors are prepared, and these are arbitrarily mixed. It was common to manufacture.
However, a paint with a desired color tone obtained by mixing a plurality of paints can only obtain a coating film produced only with pigments of the same color, even though pigments with different color tones are mixed therein. Unsatisfactory, it was a flat single color with little change.

In view of this, there has been proposed a coating in which gelled colored particles obtained by encapsulating an emulsion coating with a gelled film are dispersed in a dispersion medium.
Emulsion paints belong to water-based paints and have higher environmental compatibility than conventional solvent-type paints. In addition, by encapsulating the emulsion paint with a gelled film, the colored particles are stably dispersed in the dispersion medium. Can be formed.

  As a method for producing a paint containing gelled colored particles, for example, in Patent Document 1, an emulsion paint containing a resin emulsion, a color pigment, and a hydrophilic colloid-forming substance is added to a dispersion medium containing a gelling agent. In addition, a method is disclosed in which after the surface of an emulsion paint is gelled, the emulsion paint (gelated product) having a gelled surface is subdivided while stirring with a disperser such as a dissolver.

JP 2008-44991 A

However, as described in Patent Document 1, in the case of a method of subdividing the gelled material while stirring with a disperser such as a dissolver, for example, as shown in FIG. It was easy to get involved. Therefore, it was necessary to stop the stirring and scrape off the gelled product G entangled with the rotating shaft 13. After the gelled material entangled with the rotating shaft is scraped off, stirring is resumed and the undivided gelled material is crushed.
As described above, when the gelled product is entangled with the rotating shaft, the stirring must be stopped, and the productivity tends to decrease.

  This invention is made | formed in view of the said situation, and aims at provision of the manufacturing method of the pattern coating composition which can manufacture a pattern coating composition with sufficient productivity.

The present invention has the following aspects.
[1] In a method for producing a pattern coating composition containing a gelled product obtained by gelling the surface of a colored paint, a step of bringing the colored paint into contact with a dispersion medium containing a gelling agent to gel the surface of the colored paint; A step of crushing the colored paint whose surface is gelled by a crushing means comprising a crushing chamber and a crushing mechanism in which a rotary blade is attached to the tip of a rotating shaft extending from the bottom or side surface of the crushing chamber to the crushing chamber; A process for producing a pattern coating composition.

  According to the method for producing a pattern coating composition of the present invention, a pattern coating composition can be produced with high productivity.

It is a figure which shows an example of the crushing means used for this invention, (a) is a top view, (b) is the perspective view seen from the side surface. It is a figure which shows an example of a rotary blade, (a) is a perspective view, (b) is the elements on larger scale of (a). It is a perspective view explaining an example of crushing of the gelled material with a rotary blade. It is a figure which shows the other example of the crushing means used for this invention, (a) is a side view, (b) is sectional drawing which follows the a-a 'line of (a). It is a schematic diagram which shows an example of the state which entangles so that a gelled material may wind up to a rotating shaft.

Hereinafter, the present invention will be described in detail.
The method for producing a pattern coating composition of the present invention is a method for producing a pattern coating composition containing a gelled product obtained by bringing a colored coating into contact with a dispersion medium containing a gelling agent and gelling the surface of the colored coating.

<Colored paint>
Examples of the color paint include emulsion paint containing a resin emulsion, a color pigment, and a hydrophilic colloid-forming substance, and chitosan-containing paint containing chitosan, a color pigment, and a complex-forming substance. A chitosan-containing paint is preferred in that an antibacterial effect can be imparted to the coating film formed from the pattern paint composition.

(Emulsion paint)
As the resin emulsion contained in the emulsion paint, for example, polyvinyl acetate, acrylic resin, polystyrene, acrylonitrile, Veova (branched fatty acid vinyl ester), natural or synthetic rubber, and emulsions of copolymers thereof are generally commercially available. Resin emulsions can be used. Among these, an acrylic resin is preferable.

Examples of coloring pigments include inorganic pigments such as carbon black, titanium oxide, iron oxide, lead chromate, cadmium yellow, and cadmium red; brilliant pigments such as pearl pigments, mica pigments, mica-coated pearl pigments, aluminum powder, and stainless steel powder. Organic pigments such as phthalocyanine blue, phthalocyanine green, and quinacridone red; These color pigments may be used alone or in combination of two or more.
The content of the color pigment is preferably 0.01 to 50 parts by mass, more preferably 0.1 to 30 parts by mass with respect to 100 parts by mass of the resin emulsion.

When the emulsion paint contains a hydrophilic colloid-forming substance, the hydrophilic colloid-forming substance and a gelling agent described below react to encapsulate the emulsion paint with a gelled film.
Examples of the hydrophilic colloid-forming substance include aqueous solutions containing natural polymers such as cellulose derivatives; polyethylene oxide; polyvinyl alcohol; casein, starch, galactomannone, guar gum, locust bean gum, and the like. Among them, an aqueous solution of guar gum is preferable, and the concentration of the aqueous solution is preferably 0.5 to 5% by mass, and more preferably 1.0 to 3% by mass. These hydrophilic colloid-forming substances may be used alone or in combination of two or more.
The content of the hydrophilic colloid-forming substance is preferably 0.05 to 5 parts by mass, more preferably 0.1 to 3.0 parts by mass with respect to 100 parts by mass of the resin emulsion. If the content of the hydrophilic colloid-forming substance is within the above range, a stable gelled film can be easily obtained.

The emulsion paint may contain extender pigments and known additives (eg, thickeners, dispersants, antifoaming agents, preservatives, leveling agents, etc.) as optional components as necessary.
Examples of extender pigments include kaolin, barium sulfate, hydrous magnesium silicate, and calcium carbonate. These extender pigments may be used alone or in combination of two or more.
As for content of an extender, 0-30 mass% is preferable in 100 mass% of emulsion paints, More preferably, it is 0-20 mass%.

The emulsion paint is obtained by adding a mixed solution of a coloring pigment and water to the resin emulsion obtained by adding a hydrophilic colloid-forming substance and stirring and mixing, and further stirring and mixing.
The content of water is preferably 40 to 90% by mass, more preferably 50 to 80% by mass in 100% by mass of the emulsion paint.

(Chitosan-containing paint)
A commercial item can be used as chitosan contained in a chitosan containing coating material.
Examples of the color pigment include the color pigments exemplified above in the description of the emulsion paint. These color pigments may be used alone or in combination of two or more.
The content of the color pigment is preferably 0.01 to 50 parts by mass, more preferably 0.1 to 30 parts by mass with respect to 100 parts by mass in total of chitosan contained in the chitosan-containing paint, the complex-forming substance, and water. Part.

When the chitosan-containing paint contains a complex-forming substance, chitosan reacts with the complex-forming substance in water to form an ionic complex. By bringing this ion complex into contact with the dispersion medium, the surface of the ion complex is gelled, and a chitosan film is formed.
Examples of the complex-forming substance include inorganic acids such as hydrochloric acid; organic acids such as acetic acid, formic acid, acrylic acid, lactic acid, and malic acid. Of these, an aqueous solution of hydrochloric acid is preferred.
As for content of a complex formation substance, 20-150 mass parts is preferable with respect to 100 mass parts of chitosan, More preferably, it is 50-100 mass parts.

If necessary, the chitosan-containing paint may contain a resin emulsion, extender pigments and known additives (eg, thickeners, dispersants, antifoaming agents, preservatives, leveling agents, etc.) as optional components. .
Examples of extender pigments and additives include extender pigments and additives exemplified above in the description of the emulsion paint.

The chitosan-containing paint is obtained by adding a color pigment to a solution obtained by adding chitosan to an aqueous solution of the above complex-forming substance and stirring and mixing, and further stirring and mixing.
40-90 mass% is preferable in 100 mass% of chitosan containing coating materials, and, as for content of water, More preferably, it is 50-80 mass%.

<Dispersion medium>
The dispersion medium is an aqueous dispersion medium containing a gelling agent.
Examples of the gelling agent include an aqueous solution containing magnesium montmorillonite clay, sodium pentachlorophenol, borate, tannic acid, titanium lactate, calcium chloride, sodium hydroxide and the like. In particular, when an emulsion paint is used as the colored paint, an aqueous solution of borate is preferable, and when an chitosan-containing paint is used, an aqueous solution of calcium chloride is preferable. The concentration of the borate aqueous solution is preferably 0.05 to 10% by mass, more preferably 0.5 to 8% by mass. As for the density | concentration of the aqueous solution of calcium chloride, 0.05-20 mass% is preferable, More preferably, it is 0.1-10 mass%. These gelling agents may be used alone or in combination of two or more.
In the case of using an emulsion paint as the colored paint, the content of the gelling agent is preferably 0.05 to 5% by weight, more preferably 0.1 to 3% by weight, in 100% by weight of the dispersion medium. On the other hand, when the chitosan-containing paint is used as the colored paint, the content of the gelling agent is preferably 0.1 to 5% by mass, more preferably 0.5 to 3% by mass in 100% by mass of the dispersion medium.
If the content of the gelling agent is within the above range, a stable gelled film can be easily obtained.

The dispersion medium may contain extender pigments, water-soluble polymer compounds, and known additives as optional components as necessary.
Examples of the extender include the extender exemplified above in the description of the emulsion paint. Among these, a dispersion of hydrous magnesium silicate is preferable, and the concentration of the dispersion is preferably 0.05 to 20% by mass, more preferably 2 to 10% by mass. These extender pigments may be used alone or in combination of two or more.
The content of the extender is preferably 0.05 to 10% by mass, more preferably 0.1 to 5 parts by mass in 100% by mass of the dispersion medium.

Examples of the water-soluble polymer compound include aqueous solutions containing hydroxyethyl cellulose, carboxymethyl cellulose, methyl cellulose, polyvinyl alcohol and the like. Among them, an aqueous solution of carboxymethyl cellulose or methyl cellulose is preferable, and the concentration of these aqueous solutions is preferably 0.1 to 5% by mass, more preferably 0.5 to 3% by mass. These water-soluble polymer compounds may be used alone or in combination of two or more.
The content of the water-soluble polymer compound is preferably 0.05 to 3% by mass, more preferably 0.1 to 2% by mass in 100% by mass of the dispersion medium.

  As an additive, the additive illustrated previously in description of an emulsion coating material is mentioned.

The dispersion medium is obtained by adding water and diluting an aqueous solution containing a gelling agent and, if necessary, a dispersion containing an extender pigment, an aqueous solution containing a water-soluble polymer compound, and the like. .
As for content of water, 20-80 mass% is preferable in 100 mass% of dispersion media, More preferably, it is 30-70 mass%.

<Manufacturing method>
Hereinafter, an example of the manufacturing method of the pattern coating composition of this invention is demonstrated.
The manufacturing method of the pattern coating composition of this embodiment has the following process (1) and process (2).

(Process (1))
Step (1) is a step of bringing a colored paint into contact with a dispersion medium containing a gelling agent to gel the surface of the colored paint.
The method for bringing the colored paint into contact with the dispersion medium is not particularly limited, and examples thereof include a method of adding the colored paint to the dispersion medium. When the colored paint comes into contact with the dispersion medium, the surface of the colored paint is gelled to form a gelled product (colored paint having a gelled surface).

  The amount of the colored paint added is preferably 150 parts by mass or less, more preferably 100 parts by mass or less, with respect to 100 parts by mass of the dispersion medium. By making the addition amount of the colored paint within the above range, gel-like colored particles having a uniform shape can be easily obtained. The lower limit of the amount of the colored paint added is not particularly limited, but is preferably 30 parts by mass or more with respect to 100 parts by mass of the dispersion medium.

(Process (2))
Step (2) is a colored paint whose surface is gelled by a crushing means having a crushing chamber and a crushing mechanism having a rotary blade attached to the tip of a rotating shaft extending from the bottom or side surface of the crushing chamber to the crushing chamber. This is a step of crushing (gelated product).
As the crushing method, for example, a cut method, a hammer method, a grinder method, a press method, or the like can be adopted.
As a crushing means adopting such a crushing method, for example, a disintegrator manufactured by Husqvarna Zenoa Co., Ltd .; a dispa mill, a disintegrator manufactured by Hosokawa Micron Co., Ltd., a hammer mill, a rotoplex, a nibra, a rubber chopper, a feather mill, a micro pulverizer , Bantam Mill, Pharma Mill, Victor Mill, Fine Impact Mill, Contraplex, Linrex Mill, Gracis, ACM Pulverizer, ACM Pulverizer E-ACM; Glow Mill manufactured by Glow Engineering Co., Ltd. Crusher, disc cutter, rotary cutter, rotary cutter mini, permut, tabletop pulperizer; Permas colloider, super mass colloidal α, micromeister, micromeister mini, selenium mirror, selenium mirror DAU, atomizer, cutter mill, massomizer X, bone cutter, chopper, pulverizer, bone crusher, food cutter; G master, rapid, supermixer manufactured by Ohira; Spiral pin mixer, cavitron, fine flow mill manufactured by Taiheiyo Kiko Co., Ltd .; FM mixer, mechanical nano hybrid, granulated mixer granule manufactured by Nihon Coke Industries Co., Ltd. can be used .
Here, an example of crushing the gelled product will be described in detail with reference to FIG. 2 to 5 described later, the same components as those in FIG.

FIG. 1 is a view showing an example of a crushing means used in the present invention, where (a) is a plan view and (b) is a perspective view seen from the side.
The crushing means 10 of this example includes a crushing chamber 11 that stores a gelled product, and a crushing mechanism 12 that crushes the gelled product stored in the crushing chamber 11.
The crushing chamber 11 is not particularly limited as long as it can accommodate the gelled material.

The crushing mechanism 12 has a rotary shaft 13 extending from the bottom surface 11 a of the crushing chamber 11 into the crushing chamber 11, and a rotary blade 14 attached to the tip of the rotary shaft 13.
A rotary drive source (not shown) such as a motor is connected to the rotary shaft 13. The rotary blade 14 can be rotated by rotating the rotary shaft 13 by this rotary drive source.

In the crushing mechanism 12 of this example, two rotary blades 14 are attached to the rotary shaft 13 also below the rotary blade 14 attached to the tip. That is, the rotary blade 14 is attached to the rotary shaft 13 in three stages.
The three rotary blades 14 are attached to the rotary shaft 13 so that the longitudinal direction is shifted every 60 °.

  As shown in FIG. 2, the rotary blade 14 of this example is composed of a horizontal cutting blade 14a and vertical vertical cutting blades 14b arranged above and below the horizontal cutting blade 14a.

In crushing the gelled product using the crushing means 10, first, the gelled product is put into the crushing chamber 11. The dispersion medium may be put into the crushing chamber 11 together with the gelled product, or the gelled product may be separated from the dispersion medium in advance by filtration or the like, and only the gelled product may be put into the crushing chamber 11. Alternatively, the colored paint and the dispersion medium may be charged into the crushing chamber 11 so that the surface of the colored paint is gelled in the crushing chamber 11.
Next, the rotary blade 14 is also rotated by rotating the rotary shaft 13 with a rotational drive source (not shown). Then, as shown in FIG. 3, the gelled product G is cut up and down with the horizontal cutting blade 14 a of the rotary blade 14, and cut into the left and right with the vertical cutting blade 14 b, and becomes a fragmented gelated product g. Further, since the three rotary blades 14 are attached to the rotating shaft 13 while being displaced every 60 °, the gelled product G in the crushing chamber 11 can be efficiently stirred, and the gelled product G can be crushed without unevenness.

The finely-divided gelled product thus obtained is mixed with other components (for example, a resin emulsion serving as a binder or a known additive) to obtain a pattern coating composition.
In addition, when crushing the gelled material, when the dispersion medium is also introduced into the crushing chamber 11, the fragmented gelled material is obtained in a state of being dispersed in the dispersion medium. The fragmented gelated product and the dispersion medium may be used as they are as a pattern coating composition, or the fragmented gelled product is separated from the dispersion medium, and only the fragmented gelated product is used as the pattern coating composition. It may be used.

Examples of the resin emulsion contained in the pattern paint composition include the resin emulsions exemplified above in the description of the emulsion paint. Among these, an acrylic resin is preferable.
The content of the resin emulsion is preferably 50% by mass or less, more preferably 20 to 40% by mass in 100% by mass of the pattern coating composition. If the content of the resin emulsion is within the above range, a coating film with good workability and good durability of the pattern coating composition can be obtained.
Examples of the additive contained in the pattern paint composition include those exemplified above in the description of the emulsion paint.

The pattern coating composition may contain a plurality of gelled products having different color tones. A pattern coating composition containing gelled products having different color tones is also referred to as a “multicolored pattern coating composition”.
When the pattern paint composition is a multi-color paint composition, for example, in step (1), the second or subsequent color paint may be brought into contact with the dispersion medium in which the first color gel is dispersed, or the number of the color paints. A dispersion medium may be prepared in accordance with the above, and one colored paint may be brought into contact with one dispersion medium. Further, in step (2), a plurality of gelled products having different color tones may be put into a crushing chamber at a time, and these may be crushed together, or may be mixed after crushing the gelled product for each color. Good.

<Effect>
As described above, in the case of the method of subdividing the gelled product while stirring with a disperser such as a dissolver, for example, as shown in FIG. 5, the gelled product G was easily entangled around the rotating shaft 13. It is considered that this is because the rotating shaft 13 extends from the top surface 11 c of the crushing chamber 11 to the crushing chamber 11, and thus the viscous gelled product G gradually entangles with the rotating shaft 13 as stirring is continued.
However, according to the method for producing a pattern coating composition of the present embodiment, the crushing means includes a crushing chamber and a crushing mechanism in which a rotary blade is attached to the tip of a rotating shaft extending from the bottom surface of the crushing chamber to the crushing chamber. The colored paint (gelled product) having a gelled surface is crushed. Viscous gelled material has the property of being entangled with the shaft so as to wind up, but in the present invention, since the rotary blade is attached to the tip of the rotating shaft, it prevents the gelled material from being entangled so as to be wound around the rotating shaft. it can. Therefore, if it is this invention, since it is not necessary to stop stirring and scrape off the gelled material entangled with the rotating shaft, a pattern coating composition can be manufactured with high productivity.

<Application>
There is no restriction | limiting in particular about the use of the pattern coating composition obtained by this invention, It is possible to apply | coat to various objects, such as mortar, concrete, a ceramic material, plastics, a metal, wood, and paper. Although there is no restriction | limiting in particular in the application quantity of the pattern coating composition at the time of application | coating, Usually, it is preferable to apply | coat so that it may become 300-600 g / m < ² >. The coating method is not limited and can be applied by a known method such as a brush, a trowel, a roller, or a spray, and can be dried at room temperature or heat after coating.

<Other embodiments>
The manufacturing method of the pattern coating composition of this invention is not limited to what was mentioned above.
For example, in the crushing means 10 shown in FIG. 1, the rotating shaft 13 extends from the bottom surface 11 a of the crushing chamber 11 into the crushing chamber 11, but the rotating shaft 13 extends from the side surface 11 b of the crushing chamber 11 into the crushing chamber 11. May be.
The number of the rotary blades 14 is not limited to three, and may be one, two, or four or more.
The rotary blade 14 is not limited to the one shown in FIGS.

Further, in the crushing means 10 shown in FIG. 1, a plate-like rotary blade 14 is attached to the rotary shaft 13. For example, as shown in FIG. 4, the rotary blade 14 includes a prismatic rotary blade main body 14 c, You may be comprised with the blade 14d attached to each surface. FIG. 4 is a view showing another example of the crushing means used in the present invention, (a) is a side view, and (b) is a cross-sectional view taken along line aa ′ of (a). .
The crushing means 20 shown in FIG. 4 includes a crushing chamber 11 and a crushing mechanism 12, and the crushing mechanism 12 has a rotating shaft 13 extending from the side surface 11 b of the crushing chamber 11 into the crushing chamber 11 and a tip of the rotating shaft 13. And a rotary blade 14 attached thereto.
In addition, in FIG. 4, the shape of the rotary blade main body 14c is not limited to prismatic shape, A cylindrical shape may be sufficient.
4, the rotating shaft 13 extends from the side surface 11b of the crushing chamber 11 into the crushing chamber 11, but may extend from the bottom surface 11a of the crushing chamber 11 into the crushing chamber 11.

  EXAMPLES Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited to these examples. In the examples, “part” means “part by mass”, and “%” means “% by mass”.

"Manufacture of colored paints"
<Manufacture of emulsion paint>
38 parts of an acrylic resin emulsion (manufactured by Nippon Acrylic Chemical Co., Ltd., “Primal AC-38”) and 28.5 parts of a 1.5% aqueous solution of a nonionic guar rubber derivative (solid content 0.43 parts) were mixed, A mixed solution (a) was prepared.
Separately, 10 parts of titanium white as a coloring pigment, 1 part of an anionic polymer dispersant (manufactured by Nippon Acrylic Chemical Co., Ltd., “Orotan 731”), and 22.5 parts of water are mixed, and the mixed solution (b) is added. Prepared.
The mixed solution (b) was added to the mixed solution (a) and stirred to obtain an emulsion paint.

<Manufacture of paint containing chitosan>
To 95 parts of a 5% aqueous solution of lactic acid, 5 parts of chitosan was gradually added and stirred for 90 minutes to prepare a chitosan solution. To 100 parts of the obtained chitosan solution, 1 part of a tea pigment was added and stirred for 20 minutes to obtain a chitosan-containing paint.

"Manufacture of dispersion media"
<Production of dispersion medium (1)>
To 25 parts of a 4% dispersion of hydrous magnesium silicate in water (1 part solids), 5 parts of a 5% aqueous solution of ammonium biborate (solids 0.25 parts) and 25 parts of a 1% aqueous solution of sodium carboxymethylcellulose ( (0.25 part solid content) was added and stirred and mixed, and then 45 parts water was added and diluted to obtain a dispersion medium (1).

<Production of dispersion medium (2)>
50 parts of a 20% calcium chloride aqueous solution and 50 parts of a 1.5% methylcellulose aqueous solution were mixed to obtain a dispersion medium (2).

"Example 1"
An emulsion paint was used as the colored paint, the dispersion medium (1) was used as the dispersion medium, and “FM mixer” manufactured by Nippon Coke Industries, Ltd. was used as the crushing means. The “FM mixer” includes a crushing chamber and a crushing mechanism, and this crushing mechanism includes a rotary shaft extending from the bottom surface of the crushing chamber into the crushing chamber, and a rotary blade attached to the tip of the rotary shaft. .

100 parts of the emulsion paint was added to 200 parts of the dispersion medium, and left for 30 seconds until the emulsion paint gelled (step (1)).
Next, the emulsion paint (gelled product) whose surface was gelled and the dispersion medium were separated by filtration, and the separated gelled product was crushed by crushing means to obtain a fragmented gelled product (step (2)).
In the step (2), the gelled material could be obtained with good productivity and without being entangled with the rotating shaft.

"Example 2"
A refined gelled product was obtained in the same manner as in Example 1 except that a chitosan-containing paint was used as the colored paint and the dispersion medium (2) was used as the dispersion medium.
In the step (2), the gelled material could be obtained with good productivity and without being entangled with the rotating shaft.

"Example 3"
An emulsion paint was used as the colored paint, the dispersion medium (1) was used as the dispersion medium, and “Feather Mill FM-1” manufactured by Hosokawa Micron Corporation was used as the crushing means. The “Feather Mill FM-1” includes a crushing chamber and a crushing mechanism, and this crushing mechanism includes a rotating shaft extending from the side surface of the crushing chamber into the crushing chamber and a rotating blade attached to the rotating shaft. . The rotary blade is composed of a prismatic rotary blade body and blades attached to the respective surfaces.

100 parts of the emulsion paint was added to 200 parts of the dispersion medium, and left for 30 seconds until the emulsion paint gelled (step (1)).
Next, the emulsion paint (gelled product) whose surface was gelled and the dispersion medium were separated by filtration, and the separated gelled product was crushed by crushing means to obtain a fragmented gelled product (step (2)).
In the step (2), the gelled material could be obtained with good productivity and without being entangled with the rotating shaft.

Example 4
A refined gelled product was obtained in the same manner as in Example 3 except that the chitosan-containing paint was used as the coloring paint and the dispersion medium (2) was used as the dispersion medium.
In the step (2), the gelled material could be obtained with good productivity and without being entangled with the rotating shaft.

"Comparative Example 1"
An emulsion paint was used as the color paint, the dispersion medium (1) was used as the dispersion medium, and “Dissolver” manufactured by Inoue Seisakusho Co., Ltd. was used as the crushing means. The “dissolver” includes a crushing chamber and a crushing mechanism, and this crushing mechanism includes a rotary shaft extending from the top surface of the crushing chamber into the crushing chamber, and a rotary blade attached to the tip of the rotary shaft. .

100 parts of the emulsion paint was added to 200 parts of the dispersion medium, and left for 30 seconds until the emulsion paint gelled (step (1)).
Next, the emulsion paint (gelled product) whose surface was gelled and the dispersion medium were separated by filtration, and the separated gelled product was crushed by crushing means to obtain a fragmented gelled product (step (2)).
In the step (2), the gelled product is entangled so as to be wound around the rotating shaft, and it is necessary to stop stirring each time and remove the gelled product entangled with the rotating shaft.

DESCRIPTION OF SYMBOLS 10 Crushing means 11 Crushing chamber 11a Bottom surface 11b Side surface 12 Crushing mechanism 13 Rotating shaft 14 Rotating blade 20 Crushing means G Gelled material (colored paint with surface gelled)
g Subdivided gelled product

Claims (1)

In the method for producing a pattern coating composition containing a gelled product obtained by gelling the surface of a colored coating,
Contacting the colored paint with a dispersion medium containing a gelling agent to gel the surface of the colored paint;
A step of crushing the colored paint whose surface is gelled by a crushing means comprising a crushing chamber and a crushing mechanism in which a rotary blade is attached to the tip of a rotating shaft extending from the bottom or side surface of the crushing chamber to the crushing chamber;
A process for producing a pattern coating composition.

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