WO2016104286A1 - Oxidation polymerization-type offset printing ink composition, manufacturing method for oxidation polymerization-type offset printing ink composition, and printed matter - Google Patents

Oxidation polymerization-type offset printing ink composition, manufacturing method for oxidation polymerization-type offset printing ink composition, and printed matter Download PDF

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Publication number
WO2016104286A1
WO2016104286A1 PCT/JP2015/085219 JP2015085219W WO2016104286A1 WO 2016104286 A1 WO2016104286 A1 WO 2016104286A1 JP 2015085219 W JP2015085219 W JP 2015085219W WO 2016104286 A1 WO2016104286 A1 WO 2016104286A1
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printing ink
ink composition
mass
less
water
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PCT/JP2015/085219
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French (fr)
Japanese (ja)
Inventor
清信 今井
英敏 細田
はるか 我妻
実 小田
倫康 村上
彰義 三品
竜志 奥田
一成 増子
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Ｄｉｃグラフィックス株式会社
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Priority to JP2016540061A priority Critical patent/JP6051345B2/en
Publication of WO2016104286A1 publication Critical patent/WO2016104286A1/en

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/08—Printing inks based on natural resins

Definitions

  • the present invention relates to an oxidation polymerization offset printing ink composition, a method for producing an oxidation polymerization offset printing ink composition, and a printed matter.
  • Offset printing utilizes the fact that water and oil repel each other, and by supplying dampening water at the same time as ink is supplied to the plate, there is a difference in the ink inking property between the image area and the non-image area. An ink image is formed.
  • the offset printing ink composition used for such offset printing contains a volatile organic solvent, the use amount of such an organic solvent is required to be reduced in order to reduce the environmental load.
  • Patent Document 1 proposes an oxidative polymerization type ink which substantially contains no organic solvent and supplements the setability by including an unsaturated fatty acid ester which is superior in drying property to vegetable oil.
  • Patent Document 2 discloses such a water-based printing ink composition containing a pigment, a water-soluble resin or a water-dispersible resin, a hydroxyl group-containing compound or an amino group-containing compound, and water.
  • the unsaturated fatty acid ester used in Patent Document 1 can improve the drying speed, but is likely to adhere to the non-image area of the printing plate as in the case of vegetable oil. For this reason, printing inks using unsaturated fatty acid esters as a substitute for part or all of the organic solvent have an excessively high content of vegetable oil and unsaturated fatty acid esters contained in the printing ink, and are not suitable for the non-image area. There is a possibility that the ink adhesion prevention property (hereinafter referred to as stain resistance) is lowered.
  • the present invention has been made in view of such circumstances, and can be used in a lithographic printing machine using a fountain solution, which has been widely used in the past, and uses less organic solvent than conventional products. It is an object to provide an oxidation polymerization type offset printing ink composition having excellent balance of on-machine stability, prevention of ink adhesion to non-image areas (hereinafter referred to as stain resistance) and oxidation polymerization. And
  • the inventors have added a hydrophilic substance and adjusted the tolerance value of varnish, vegetable oil, organic solvent, and extender pigment, thereby reducing the amount of organic solvent used than before. Even in this case, it was found that an oxidation polymerization type offset printing ink composition having an excellent balance of on-machine stability, stain resistance and oxidation polymerization property can be obtained, and the present invention was completed.
  • the present invention can be realized as the following forms or application examples.
  • the oxidation polymerization offset printing ink composition according to this application example includes a varnish, a vegetable oil, an organic solvent, an extender pigment, and a water-soluble hydrophilic substance that exhibits a thickening action when added to water. 1)-(5) is satisfied.
  • the tolerance value of varnish is 3 (mL / 3g) or more and 30 (mL / 3g) or less.
  • Content of vegetable oil is 20 mass% or more and 50 mass% or less.
  • the content of the organic solvent is 0% by mass or more and 30% by mass or less.
  • the content of the extender pigment is 0.1% by mass or more and 15% by mass or less.
  • the content of the hydrophilic substance is 0.01% by mass or more and 2.5% by mass or less.
  • the oxidation polymerization offset printing ink composition according to the application example described above further includes water, and the content thereof is preferably 1% by mass or more and 15% by mass or less of the oxidation polymerization offset printing ink composition.
  • the hydrophilic substance has a viscosity of 2% by mass aqueous solution of 2.5 mPa ⁇ s or more and 1500 mPa ⁇ s or less, or 1% by mass of aqueous solution has a viscosity of 10 mPa ⁇ s. It is preferably 8000 mPa ⁇ s or less.
  • the hydrophilic substance is preferably sodium carboxymethyl cellulose having a degree of etherification of 0.45 or more.
  • the content of inorganic acid, inorganic acid salt, organic acid, organic acid salt is 0.2% by mass of the oxidation polymerization type offset printing ink composition for offset. The following is preferable.
  • the content of the water-insoluble emulsifier is preferably less than 1% by mass of the oxidation polymerization type offset printing ink composition.
  • a method for producing an oxidation polymerization offset printing ink composition according to this application example includes varnish, vegetable oil, organic solvent, extender pigment, and a water-soluble hydrophilic substance that exhibits a thickening action when added to water.
  • a method for producing an oxidation polymerization type offset printing ink composition that satisfies the following conditions (1) to (5), wherein a hydrophilic substance is dissolved in water and added.
  • the tolerance value of varnish is 3 (mL / 3g) or more and 30 (mL / 3g) or less.
  • Content of vegetable oil is 20 mass% or more and 50 mass% or less.
  • the content of the organic solvent is 0% by mass or more and 30% by mass or less.
  • the content of the extender pigment is 0.1% by mass or more and 15% by mass or less.
  • the content of the hydrophilic substance is 0.01% by mass or more and 2.5% by mass or less.
  • the present invention can be used in a lithographic printing machine of a type that uses a fountain solution that has been widely used in the past, and is stable on the machine even when the amount of organic solvent used is reduced from the conventional product. It can be set as the oxidation polymerization type offset printing ink composition excellent in the balance of stain resistance and oxidation polymerization property. Moreover, the printed matter printed using the oxidation polymerization type offset printing ink composition of the present invention can be a printed matter with reduced environmental load.
  • the oxidation polymerization type offset printing ink composition of the present invention comprises a varnish, a vegetable oil, an organic solvent, an extender pigment, and a water-soluble hydrophilic substance that exhibits a thickening action when added to water.
  • the condition (5) is satisfied.
  • the tolerance value of varnish is 3 (mL / 3g) or more and 30 (mL / 3g) or less.
  • Content of vegetable oil is 20 mass% or more and 50 mass% or less.
  • the content of the organic solvent is 0% by mass or more and 30% by mass or less.
  • the content of the extender pigment is 0.1% by mass or more and 15% by mass or less.
  • the content of the hydrophilic substance is 0.01% by mass or more and 2.5% by mass or less.
  • the printing ink composition of the present invention will be described in detail.
  • the oxidation polymerization offset printing ink composition is also simply referred to as a printing ink composition.
  • the color pigment used in the printing ink composition of the present invention is not particularly limited, and various organic pigments and inorganic pigments can be used.
  • yellow pigments include disazo yellow (Pigment Yellow 12, Pigment Yellow 13, Pigment Yellow 17, Pigment Yellow 1), Hansa Yellow, etc.
  • magenta pigments include Brilliant Carmine 6B, Lake Red C, Watching Red, and the like. Is mentioned.
  • cyan pigments include phthalocyanine blue, phthalocyanine green, and alkali blue.
  • black pigments include carbon black such as furnace carbon black and channel black, and aniline black.
  • the varnish used in the printing ink composition of the present invention contains at least a rosin-modified phenol resin and has an n-heptane tolerance value of 3 (mL / 3 g) to 30 (mL / 3 g).
  • the tolerance value can be measured by a general method. For example, while maintaining 3 g of varnish at 25 ° C., n-heptane is dropped and mixed with the varnish and stirred, and the amount of n-heptane added (mL) when completely clouded is n-heptane tolerance (unit: mL / 3g).
  • the on-machine stability and oxidative polymerization property of the printing ink composition containing a hydrophilic substance described later can be made suitable.
  • the tolerance value of the varnish is less than 3, the on-machine stability may be deteriorated.
  • the tolerance value of the varnish exceeds 30, the on-machine stability is improved while the stain resistance is lowered.
  • the varnish used in the printing ink composition of the present invention can be obtained by a known method.
  • a vegetable oil and an organic solvent described later are added to a rosin-modified phenol resin and dissolved by heating, and transesterification with a vegetable oil component and / or The method of performing an aluminum chelation reaction is mentioned.
  • the tolerance value can be adjusted by adjusting the molecular weight of the rosin-modified phenolic resin or using other resins in combination.
  • examples of other resins that can be used in combination with the rosin-modified phenol resin include petroleum resins, alkyd resins, rosin-modified alkyd resins, petroleum resin-modified alkyd resins, and rosin ester resins.
  • the tolerance value of a varnish can be adjusted also by changing the kind of vegetable oil component used for manufacture of a varnish, and the temperature of transesterification.
  • (Vegetable oil) A conventionally well-known thing can be used for a vegetable oil, There is no restriction
  • Di-n-octyl ether, di-nonyl ether, dihexyl ether, nonyl hexyl ether, nonyl butyl ether, diheptyl ether, didecyl ether, nonyl octyl ether and the like may be used as ethers made from vegetable oil.
  • Regenerated vegetable oil can also be used as the vegetable oil component.
  • Regenerated vegetable oil refers to vegetable oil that has been recovered by collecting oil used for cooking and the like.
  • the regenerated vegetable oil is preferably an oil regenerated with a water content of 0.3% by mass or less, an iodine value of 90 or more, and an acid value of 3 or less, more preferably an iodine value of 100 or more.
  • the water content 0.3% by mass or less, it becomes possible to remove impurities that affect the emulsification behavior of the ink, such as salt contained in moisture, and by regenerating with an iodine value of 90 or more, drying characteristics That is, it becomes possible to make it good in oxidative polymerizability, and it becomes possible to suppress over-emulsification of ink by selecting and regenerating vegetable oil having an acid value of 3 or less.
  • Examples of the method for regenerating the recovered vegetable oil include methods such as filtration, removal of precipitates by standing, and decolorization by activated clay.
  • the content of vegetable oil in the printing ink composition of the present invention is 20% by mass or more and 50% by mass or less.
  • Organic solvent A conventionally well-known thing can be used for the organic solvent used for this invention, AF Solvent No. 4, No. 5, No. 6, No. 7, ISU Chemical Co., Ltd. made by JX Nippon Mining & Energy Corporation. Examples include DSOL240, 260SP, 260C manufactured by LTD. It is preferable that the initial boiling point obtained by the distillation test described in JIS K2254 of the organic solvent is 230 ° C. or higher and the end point is 350 ° C. or lower. Content of the organic solvent in the printing ink composition of this invention is 30 mass% or less, and does not need to contain the organic solvent at all. Thereby, both on-machine stability and oxidative polymerization can be achieved.
  • the extender pigment used in the printing ink composition of the present invention is not particularly limited, and clay such as wax stone clay, talc, barium sulfate, calcium carbonate, heavy calcium carbonate, barium carbonate, magnesium carbonate, silica, bentonite, One or more known materials such as titanium oxide can be used. These extender pigments may be surface-treated with rosin acid or the like, or may be untreated. Moreover, the primary particle size is preferably 30 nm or more and 150 nm or less. Oxidation polymerizability can be improved by including extender pigments. If an extender pigment is excessively added to the printing ink composition of the present invention, the emulsification of the print ink composition is induced during printing, and the on-machine stability is lowered. It is preferable that it is 0.1 to 15 mass%.
  • the printing ink composition of the present invention contains 0.01% to 2.5% by weight of a hydrophilic substance in terms of solid content.
  • the hydrophilic substance used in the present invention has a function as a so-called thickening agent that exhibits a thickening action when added to water, and dissolves in water but is usually used in an oxidation polymerization type offset printing ink composition. It is a hydrophilic substance that does not dissolve in vegetable oils and high-boiling petroleum hydrocarbon solvents. Among them, it is preferable to use a material that exhibits a thickening effect when added in a small amount to water because the storage stability of the printing ink composition is increased.
  • the printing ink composition can easily retain water, and adhesion of the printing ink composition generated in the non-image area as printing progresses can be prevented.
  • a water-insoluble substance that absorbs water and forms a gel, but does not substantially dissolve in water has a weak affinity with the non-image area of the printing plate, so that it has a sufficient anti-smudge effect. I can't.
  • the content of the hydrophilic substance exceeds 2.5% by mass of the printing ink composition, excess water tends to be taken into the printing ink composition during printing, and the ink between the rollers of the printing machine or from the blanket to the plate. This lowers the transferability of the toner and causes stains, and causes poor quality such as density unevenness and blurring. Moreover, water cannot be appropriately hold
  • the hydrophilic substance is added to the printing ink composition in a state where water is absorbed (water retention) or dissolved in water.
  • adding a hydrophilic substance and adjusting the tolerance value of varnish and the amount of vegetable oil, organic solvent and extender pigment added to appropriate values will reduce the amount of varnish used compared to when no hydrophilic substance is included. Can be suppressed. Since the varnish contains an organic solvent, suppressing the amount of varnish used is also suppressing the amount of organic solvent used.
  • the amount of water added to the printing ink composition together with the hydrophilic substance is preferably 1% by mass or more and 15% by mass or less of the printing ink composition. Thereby, the printability and the storage stability can be improved. When the water content is less than 1% by mass, the printability effect is small, and when it exceeds 15% by mass, the storage stability deteriorates. More preferably, it is 1 mass% or more and 10 mass% or less.
  • the water added to the printing ink composition may be industrial water, but is preferably physically or chemically sterilized or sterilized from the viewpoint of storage stability.
  • physical sterilization and sterilization methods include heat sterilization, electromagnetic wave sterilization with ultraviolet rays, ozone treatment, filter sterilization, and the like.
  • chemical sterilization and sterilization methods include oxidant sterilization with a chlorine compound such as sodium hypochlorite.
  • the hydrophilic substance used in the printing ink composition of the present invention has a viscosity of 2% by mass aqueous solution dissolved in distilled water of 2.5 mPa ⁇ s or more and 1500 mPa ⁇ s or less, or a viscosity of 1% by mass aqueous solution of 10 mPa ⁇ s. It is preferably s or more and 8000 mPa ⁇ s or less. By using such a hydrophilic substance, it is possible to prevent deterioration in printability and ink storage stability.
  • the viscosity of a 1% by mass aqueous solution of a hydrophilic substance is more preferably 10 mPa ⁇ s to 4000 mPa ⁇ s, and still more preferably 10 mPa ⁇ s to 2000 mPa ⁇ s.
  • the viscosity of the aqueous solution of the hydrophilic substance is measured using a Brookfield type rotational viscometer (hereinafter also referred to as B type rotational viscometer) described in JIS K7117-1.
  • B type rotational viscometer is a Brookfield type rotational viscometer (model BM) manufactured by Tokyo Keiki Co., Ltd.
  • the specific measurement procedure is as follows. 1) Measurement of water content of hydrophilic substance Weigh 1 to 2 g of hydrophilic substance in a weighing bottle, dry it in a constant temperature dryer at 105 ⁇ 2 ° C for 4 hours, cool in a desiccator, and then weigh And calculate the water content (%) from the weight loss by the following formula.
  • Moisture content (%) (weight loss (g) / sample (g)) ⁇ 100 2)
  • Preparation of aqueous solution In a 300 mL (milliliter) Erlenmeyer flask with a stopper, weigh accurately about 4.4 g if the concentration is 2% by mass, and about 2.2 g if the concentration is 1% by mass. Add distilled water obtained by the formula and dissolve.
  • Viscosity (mPa ⁇ s) reading scale ⁇ coefficient
  • the coefficient of the previous equation is obtained from Table 1 based on the number of the rotor used and the number of rotations.
  • hydrophilic substances examples include cellulose compounds, polysaccharides, starch compounds, alginic acid compounds, acrylic compounds, vinyl compounds, and the like.
  • examples of the cellulose compound include methyl cellulose, ethyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxypropyl methyl cellulose, and cationized cellulose obtained by adding a cationizing agent to these celluloses.
  • Polysaccharides include gum arabic, carrageenan, guar gum, pectin, tragacanth, cherry, spirane, glucomannan, amylose, welan gum (gelano gum), tara gum (spin gum), locust bean gum, pullulan, duotang gum, xanthan gum, sodium chondroitin sulfate Etc. are exemplified.
  • starch compound include phosphorylated starch.
  • alginic acid compound include sodium alginate.
  • examples of the acrylic compound include sodium polyacrylate, carboxyvinyl polymer, polyacrylamide, and acrylamide / acrylate copolymer.
  • vinyl compound examples include polyvinyl pyrrolidone, polyvinyl alcohol, and polyvinyl pyrrolidone / vinyl alcohol copolymer.
  • polyethylene glycol, cationized guar gum, sodium hyaluronate and the like may be used.
  • a water-soluble cellulose derivative is preferably used as the hydrophilic substance used in the printing ink composition of the present invention, and sodium carboxymethyl cellulose is particularly preferably used.
  • sodium carboxymethyl cellulose When sodium carboxymethyl cellulose is used as the hydrophilic substance, sodium carboxymethyl cellulose having an etherification degree of 0.45 or more is particularly preferable. Such sodium carboxymethylcellulose has a high effect of preventing adhesion of the printing ink composition to the non-image area. If the degree of etherification is less than 0.45, the water solubility is lowered and the stain resistance may be lowered. Although there is no restriction
  • the degree of etherification refers to the number of carboxymethyl groups per unit of anhydrous glucose.
  • the degree of etherification is 1.0.
  • An example of a method for measuring the degree of etherification is as follows. A sample (anhydride) of 0.5 to 0.7 g is precisely weighed, wrapped in filter paper and incinerated in a magnetic crucible. After cooling, transfer this to a 500 mL (milliliter) beaker, add about 250 mL of water and 35 mL of 0.05 mol / L sulfuric acid with a pipette and boil for 30 minutes.
  • A (af ⁇ bg) / sample (anhydride) (g) ⁇ alkalinity (or + acidity)
  • Degree of etherification 162 ⁇ A / (10000-80A) (Explanation of symbols)
  • the printing ink composition of the present invention comprises a metal dryer, a compound for adjusting viscosity, a wax, a drying inhibitor, an antifoaming agent, a surfactant (emulsifier) for adjusting emulsification suitability, a preservative, a disinfectant and the like. Illustrated.
  • acids such as phosphoric acids and salts thereof, citric acid and salts thereof, and salts thereof are often added.
  • One purpose of adding such inorganic acids, organic acids and salts thereof is to prevent the printing ink composition from adhering to the non-image area of the printing plate.
  • the solubility of the hydrophilic substance in water is lowered and insolubilized, and the storage stability and stain resistance may be lowered. Therefore, the total content of inorganic acids, organic acids and salts thereof in the printing ink composition of the present invention is preferably 0.2% by mass or less, and 0.1% by mass or less of the printing ink composition. Is more preferably 0.05% by mass or less.
  • acids mentioned above include phosphoric acids such as phosphoric acid, pyrophosphoric acid, metaphosphoric acid, hexametaphosphoric acid, polyphosphoric acid, ammonium salts of these phosphoric acids, alkali metal salts, alkaline earth metal dihydrogen salts, citric acid.
  • phosphoric acids such as phosphoric acid, pyrophosphoric acid, metaphosphoric acid, hexametaphosphoric acid, polyphosphoric acid, ammonium salts of these phosphoric acids, alkali metal salts, alkaline earth metal dihydrogen salts, citric acid.
  • examples include acids, ammonium salts of citric acid, alkali metal salts, and magnesium salts.
  • a surfactant may be used together with the hydrophilic substance described above.
  • the emulsifier either water-soluble or water-insoluble can be used, and these may be used together.
  • a water-insoluble emulsifier when used, its content is less than 1% by mass of the lithographic printing ink composition. It is preferable to set it as 0.6 mass% or less.
  • the water-insoluble emulsifier remains in the printing ink without being eluted in the fountain solution, unlike the water-soluble emulsifier.
  • water-soluble emulsifier conventionally known emulsifiers can be used and are not particularly limited, and examples thereof include tridecanol, 2-hexyloctanol, 2-hexyldecanol, 2-octyldecanol, and hexyl diglycol.
  • Specific examples of the water-insoluble emulsifier include sorbitan monooleate, glycerin monooleate, polyoxyethylene cumylphenyl ether and the like.
  • Such emulsifiers are also available as commercial products, and examples thereof include Kao's Rheodor SP-010V and Rhedol SP-030V, and Nippon Emulsifier Newcol CMP-1.
  • any metal dryer may be used as long as it is usually used for oxidative polymerization drying type printing ink.
  • metals such as cobalt, manganese, lead, iron, zinc, calcium, cerium, rare earth, and carboxylic acids such as octyl acid, naphthenic acid, neodecanoic acid, tung oil acid, linseed oil acid, soybean oil acid, resin acid, etc.
  • a salt, that is, a metal soap, or a borate with a metal such as cobalt, manganese, lead, iron, zinc, calcium, cerium, or rare earth is used.
  • These dryers may be used alone or in combination of two or more.
  • the printing ink composition of the present invention includes, for example, a color pigment, an extender pigment, a solvent and other additives added to a varnish prepared using a resin containing the rosin-modified phenolic resin of the present invention, a vegetable oil, a petroleum solvent, etc. Then, after sufficiently premixing with a stirrer, the meat is kneaded with a shot mill, a roll mill or the like. After kneading, varnish, petroleum solvent, vegetable oil, hydrophilic substance, other auxiliary agents such as wax, antioxidant, emulsifier and the like are added, and the mixture is sufficiently stirred and mixed.
  • hydrophilic substance it is preferable to add the hydrophilic substance in advance using a mixer or the like until it is stirred with water until it is uniform with water.
  • the amount of these raw materials is adjusted according to the viscosity and fluidity required for the printing ink composition. Moreover, the addition time of these raw materials is not fixed, but is appropriately adjusted based on the mixed state.
  • the printed matter of the present invention is obtained by printing with a lithographic offset printing machine using the printing ink composition as described above.
  • a base material A conventionally well-known thing can be used.
  • Varnishes 2 to 8 were prepared in the same manner as Varnish 1 except that the formulation was changed as shown in Table 2.
  • Table 2 OR-372 and OR-375 are high-loss OR-372 and high-loss OR-357 (rosin-modified phenol resin, both manufactured by Seiko PMC Co., Ltd.), and 1126-HV is becacite 1126-HV (rosin Modified phenolic resin, manufactured by DIC Corporation).
  • aqueous solution of hydrophilic substance 2.5 parts of CMC having a degree of etherification of 0.48 and a 1% by weight aqueous solution of 12 mPa ⁇ s were dissolved in 97.5 parts of tap water to obtain an aqueous solution 1 of hydrophilic substance. .
  • a hydrophilic substance aqueous solution 2-8 was prepared in the same manner as the hydrophilic substance aqueous solution 1 except that the hydrophilic substance used and the blending amount thereof were as shown in Table 3. This was used for ink preparation.
  • the aqueous solution 1-7 of the hydrophilic substance is simply referred to as the aqueous solution 1-7.
  • HEC is hydroxyethyl cellulose.
  • 1% viscosity and 2% viscosity mean the viscosity of a 1% by weight aqueous solution and the viscosity of a 2% by weight aqueous solution of a hydrophilic substance, respectively, and the unit is mPa ⁇ s.
  • hydrophilic substances those having a dry purity of 99% or more were used.
  • Ink adjustment FASTOGEN BLUE FA5375 organic pigment, manufactured by DIC Corporation: 13 parts, Hakuenka T-DD (calcium carbonate, manufactured by Shiraishi Kogyo Co., Ltd.): 7 parts, varnish 1:10 parts, varnish 2:42. 8 parts, AF Solvent No. 6: 3.5 parts are kneaded using a three-roll mill, and a scale of position A of the degree of kneading of the finished base ink in the kneading degree test described in JISK5701-1 was adjusted to 3 or less.
  • wax polytetrafluoroethylene wax having an average particle size of 5 microns
  • varnish 1 11.5 parts
  • AF solvent 6 2 parts
  • DICNATE 2505SB metal soap, manufactured by DIC Corporation
  • the printing ink compositions of Example 1-13, Comparative Example 1-10, and Reference Examples 1 and 2 were prepared in the same manner as in Example 1 except that the formulation was changed as shown in Table 4-7.
  • Table 4-7 the blending amounts are values rounded off to the first decimal place. However, for the phosphoric acid of Example 12, the third decimal place is rounded off.
  • Example 12 and Comparative Example 9 an 85% aqueous phosphoric acid solution (manufactured by Wako Pure Chemical Industries) was used.
  • the amount of phosphoric acid in the table means the amount of 85% aqueous solution.
  • Example 13 and Comparative Example 10 glyceryl monooleate (Rheidol SP-030V manufactured by Kao) was used as a water-insoluble emulsifier.
  • Comparative Example 8 instead of an aqueous solution of a hydrophilic substance, a konjac for food (a product in which glucomannan was made water-insoluble with calcium hydroxide; water content 97%) was used.
  • Organic solvent reduction rate The organic solvent reduction rate (%) was calculated according to the following formula.
  • “content of the organic solvent in the printing ink composition” is the total amount of AF solvent No. 6, and the total amount of AF solvent No. 6 in the varnish and the base ink was determined.
  • the oxidation polymerization type offset printing ink composition of the present invention greatly reduces the amount of organic solvent used while maintaining the same or better performance than the conventional printing ink composition. It became what was done.
  • printing of Comparative Examples 1, 2, and 4-7 which contain a hydrophilic substance, but whose varnish tolerance value, vegetable oil, organic solvent, extender pigment, hydrophilic substance, and water content are outside the scope of the present invention
  • the ink composition could not satisfy all of the characteristics required for the oxidation polymerization type offset printing.

Abstract

　Provided is an oxidation polymerization-type offset printing ink composition that exhibits an excellent balance between press stability, stain resistance and oxidation polymerization properties, even when the amount of organic solvent used is drastically lower than conventional compositions.　The oxidation polymerization-type offset printing ink composition comprises varnish, a vegetable oil, an organic solvent, an extender pigment, and a water-soluble hydrophilic substance that exhibits a thickening effect when added to water. The oxidation polymerization-type offset printing ink composition satisfies the following conditions (1)-(5). (1) The varnish tolerance value is 3-30(mL/3g). (2) The vegetable oil content is 20-50mass%. (3) The organic solvent content is 0-30mass%. (4) The extender pigment content is 0.1-15mass%. (5) The hydrophilic substance content is 0.01-2.5mass%.

Description

酸化重合型オフセット印刷インキ組成物、酸化重合型オフセット印刷インキ組成物の製造方法および印刷物Oxidation polymerization type offset printing ink composition, method for producing oxidation polymerization type offset printing ink composition and printed matter
　本発明は、酸化重合型オフセット印刷インキ組成物、酸化重合型オフセット印刷インキ組成物の製造方法および印刷物に関する。 The present invention relates to an oxidation polymerization offset printing ink composition, a method for producing an oxidation polymerization offset printing ink composition, and a printed matter.
　オフセット印刷は、水と油が反発しあうことを利用し、版へのインキの供給と同時に湿し水を供給することにより画線部と非画線部へのインキの着肉性に差を設け、インキ画像を形成している。このようなオフセット印刷に用いられるオフセット印刷インキ組成物は揮発性の有機溶剤を含有するが、環境負荷低減のためにこのような有機溶剤の使用量の削減が求められている。 Offset printing utilizes the fact that water and oil repel each other, and by supplying dampening water at the same time as ink is supplied to the plate, there is a difference in the ink inking property between the image area and the non-image area. An ink image is formed. Although the offset printing ink composition used for such offset printing contains a volatile organic solvent, the use amount of such an organic solvent is required to be reduced in order to reduce the environmental load.
　揮発性の有機溶剤の使用量を低減する試みとして、有機溶剤の一部または全部を植物油で代替することが考えられる。しかしながら植物油は有機溶剤に比べて基材からの離脱速度や浸透速度が遅いため、単に有機溶剤を植物油に置き換えただけでは印刷物上でのセット性が低下してしまい、平版印刷の利点である生産性が低下する。そこで特許文献１では植物油よりも乾燥性に優れる不飽和脂肪酸エステルを含むことでセット性を補った、実質上有機溶剤を含有しない酸化重合型インキを提案している。 As an attempt to reduce the amount of volatile organic solvent used, it is conceivable to replace part or all of the organic solvent with vegetable oil. However, vegetable oil has a slower release rate and penetration rate from the base material compared to organic solvents, so simply replacing the organic solvent with vegetable oil will reduce the setability on the printed matter, which is an advantage of lithographic printing. Sex is reduced. Therefore, Patent Document 1 proposes an oxidative polymerization type ink which substantially contains no organic solvent and supplements the setability by including an unsaturated fatty acid ester which is superior in drying property to vegetable oil.
　また、有機溶剤削減の取組として水性印刷インキ組成物を用いて印刷することが提案されている。このような水性印刷インキ組成物として特許文献２では顔料、水溶性樹脂又は水分散性樹脂、水酸基含有化合物又はアミノ基含有化合物、水を含有するものが開示されている。 Also, it has been proposed to print using an aqueous printing ink composition as an effort to reduce organic solvents. Patent Document 2 discloses such a water-based printing ink composition containing a pigment, a water-soluble resin or a water-dispersible resin, a hydroxyl group-containing compound or an amino group-containing compound, and water.
特開平６－９３２２０号公報JP-A-6-93220 特開２００７－１１２９６３号公報JP 2007-112963 A
　しかしながら特許文献１で使用されているような不飽和脂肪酸エステルは、乾燥速度を向上させる事が出来るが、植物油と同様に印刷版の非画線部に付着しやすい。このため有機溶剤の一部または全部の代替として不飽和脂肪酸エステルを用いた印刷インキは、印刷インキに含まれる植物油と不飽和脂肪酸エステルの含有量の合計が高くなりすぎ、非画線部へのインキ付着防止性（以後耐汚れ性という）が低下するおそれがある。 However, the unsaturated fatty acid ester used in Patent Document 1 can improve the drying speed, but is likely to adhere to the non-image area of the printing plate as in the case of vegetable oil. For this reason, printing inks using unsaturated fatty acid esters as a substitute for part or all of the organic solvent have an excessively high content of vegetable oil and unsaturated fatty acid esters contained in the printing ink, and are not suitable for the non-image area. There is a possibility that the ink adhesion prevention property (hereinafter referred to as stain resistance) is lowered.
　また、特許文献２に開示されているような水性オフセット印刷インキ組成物を用いて印刷するには、湿し水を使用しない水なしオフセット印刷機を使用する必要がある。湿し水の供給が必要な平版オフセット印刷機で印刷した場合、湿し水に印刷インキが溶解し、非画線部に印刷インキが付着し、印刷物に汚れが発生して商品価値が無くなり損紙となる。リン酸塩などの汚れ防止剤を添加しても改善しない。 Further, in order to print using the aqueous offset printing ink composition as disclosed in Patent Document 2, it is necessary to use a waterless offset printing machine that does not use dampening water. When printing on a lithographic offset printing press that requires supply of dampening water, the printing ink dissolves in the dampening water, and the printing ink adheres to the non-image area, causing stains on the printed matter and loss of commercial value. It becomes paper. Even if antifouling agents such as phosphates are added, it does not improve.
　本発明はこのような事情に鑑みなされたものであって、従来から普及している、湿し水を用いるタイプの平版印刷機で用いることができ、従来品より有機溶剤の使用量を削減した場合であっても機上安定性、非画線部へのインキ付着防止性（以後耐汚れ性という）、酸化重合性のバランスに優れた酸化重合型オフセット印刷インキ組成物を提供することを目的とする。 The present invention has been made in view of such circumstances, and can be used in a lithographic printing machine using a fountain solution, which has been widely used in the past, and uses less organic solvent than conventional products. It is an object to provide an oxidation polymerization type offset printing ink composition having excellent balance of on-machine stability, prevention of ink adhesion to non-image areas (hereinafter referred to as stain resistance) and oxidation polymerization. And
　本発明者らは鋭意検討の結果、親水性物質を添加するとともに、ワニスのトレランス値、植物油、有機溶剤、体質顔料の含有量を調整することで、従来よりも有機溶剤の使用量を削減した場合であっても機上安定性、耐汚れ性、酸化重合性のバランスに優れた酸化重合型オフセット印刷インキ組成物ができることを見出し、本発明を完成させた。本発明は以下の形態または適用例として実現することが可能である。 As a result of intensive studies, the inventors have added a hydrophilic substance and adjusted the tolerance value of varnish, vegetable oil, organic solvent, and extender pigment, thereby reducing the amount of organic solvent used than before. Even in this case, it was found that an oxidation polymerization type offset printing ink composition having an excellent balance of on-machine stability, stain resistance and oxidation polymerization property can be obtained, and the present invention was completed. The present invention can be realized as the following forms or application examples.
（適用例１）
　本適用例に係る酸化重合型オフセット印刷インキ組成物は、ワニスと、植物油と、有機溶剤と、体質顔料と、水に添加すると増粘作用を示す水溶性の親水性物質とを含み、下記（１）－（５）の条件を満足することを特徴とする。
（１）ワニスのトレランス値が３（ｍＬ／３ｇ）以上３０（ｍＬ／３ｇ）以下である。
（２）植物油の含有量が２０質量％以上５０質量％以下である。
（３）有機溶剤の含有量が０質量％以上３０質量％以下である。
（４）体質顔料の含有量が０．１質量％以上１５質量％以下である。
（５）親水性物質の含有量が０．０１質量％以上２．５質量％以下である。 (Application example 1)
The oxidation polymerization offset printing ink composition according to this application example includes a varnish, a vegetable oil, an organic solvent, an extender pigment, and a water-soluble hydrophilic substance that exhibits a thickening action when added to water. 1)-(5) is satisfied.
(1) The tolerance value of varnish is 3 (mL / 3g) or more and 30 (mL / 3g) or less.
(2) Content of vegetable oil is 20 mass% or more and 50 mass% or less.
(3) The content of the organic solvent is 0% by mass or more and 30% by mass or less.
(4) The content of the extender pigment is 0.1% by mass or more and 15% by mass or less.
(5) The content of the hydrophilic substance is 0.01% by mass or more and 2.5% by mass or less.
（適用例２）
　上記適用例に係る酸化重合型オフセット印刷インキ組成物は、さらに水を含み、その含有量が酸化重合型オフセット印刷インキ組成物の１質量％以上１５質量％以下であることが好ましい。 (Application example 2)
The oxidation polymerization offset printing ink composition according to the application example described above further includes water, and the content thereof is preferably 1% by mass or more and 15% by mass or less of the oxidation polymerization offset printing ink composition.
（適用例３）
　上記適用例に係る酸化重合型オフセット印刷インキ組成物において、親水性物質は２質量％水溶液の粘度が２．５ｍＰａ・ｓ以上１５００ｍＰａ・ｓ以下であるか、１質量％水溶液の粘度が１０ｍＰａ・ｓ以上８０００ｍＰａ・ｓ以下であることが好ましい。
（適用例４）
　上記適用例に係る酸化重合型オフセット印刷インキ組成物において、親水性物質はエーテル化度が０．４５以上のカルボキシメチルセルロースナトリウムであることが好ましい。 (Application example 3)
In the oxidation polymerization type offset printing ink composition according to the application example, the hydrophilic substance has a viscosity of 2% by mass aqueous solution of 2.5 mPa · s or more and 1500 mPa · s or less, or 1% by mass of aqueous solution has a viscosity of 10 mPa · s. It is preferably 8000 mPa · s or less.
(Application example 4)
In the oxidation polymerization type offset printing ink composition according to the above application example, the hydrophilic substance is preferably sodium carboxymethyl cellulose having a degree of etherification of 0.45 or more.
（適用例５）
　上記適用例に係る酸化重合型オフセット印刷インキ組成物は、無機酸、無機酸の塩、有機酸、有機酸の塩の含有量が酸化重合型オフセット用オフセット印刷インキ組成物の０．２質量％以下であることが好ましい。 (Application example 5)
In the oxidation polymerization type offset printing ink composition according to the application example, the content of inorganic acid, inorganic acid salt, organic acid, organic acid salt is 0.2% by mass of the oxidation polymerization type offset printing ink composition for offset. The following is preferable.
（適用例６）
上記適用例に係る酸化重合型オフセット印刷インキ組成物は、非水溶性乳化剤の含有量が酸化重合型オフセット印刷インキ組成物の１質量％未満であることが好ましい。 (Application example 6)
In the oxidation polymerization type offset printing ink composition according to the above application example, the content of the water-insoluble emulsifier is preferably less than 1% by mass of the oxidation polymerization type offset printing ink composition.
（適用例７）
　本適用例に係る酸化重合型オフセット印刷インキ組成物の製造方法は、ワニスと、植物油と、有機溶剤と、体質顔料と、水に添加すると増粘作用を示す水溶性の親水性物質とを含み、下記（１）－（５）の条件を満足する酸化重合型オフセット印刷インキ組成物の製造方法であって、親水性物質を水に溶解させて添加することを特徴とする。
（１）ワニスのトレランス値が３（ｍＬ／３ｇ）以上３０（ｍＬ／３ｇ）以下である。
（２）植物油の含有量が２０質量％以上５０質量％以下である。
（３）有機溶剤の含有量が０質量％以上３０質量％以下である。
（４）体質顔料の含有量が０．１質量％以上１５質量％以下である。
（５）親水性物質の含有量が０．０１質量％以上２．５質量％以下である。 (Application example 7)
A method for producing an oxidation polymerization offset printing ink composition according to this application example includes varnish, vegetable oil, organic solvent, extender pigment, and a water-soluble hydrophilic substance that exhibits a thickening action when added to water. A method for producing an oxidation polymerization type offset printing ink composition that satisfies the following conditions (1) to (5), wherein a hydrophilic substance is dissolved in water and added.
(1) The tolerance value of varnish is 3 (mL / 3g) or more and 30 (mL / 3g) or less.
(2) Content of vegetable oil is 20 mass% or more and 50 mass% or less.
(3) The content of the organic solvent is 0% by mass or more and 30% by mass or less.
(4) The content of the extender pigment is 0.1% by mass or more and 15% by mass or less.
(5) The content of the hydrophilic substance is 0.01% by mass or more and 2.5% by mass or less.
（適用例８）
　本適用例に係る印刷物は、上記適用例に係る酸化重合型オフセット印刷インキ組成物を用いて印刷されたことを特徴とする。 (Application example 8)
The printed material according to this application example is printed using the oxidation polymerization type offset printing ink composition according to the application example.
　本発明によれば、従来から普及している、湿し水を用いるタイプの平版印刷機で用いることができ、従来品より有機溶剤の使用量を削減した場合であっても機上安定性、耐汚れ性、酸化重合性のバランスに優れた酸化重合型オフセット印刷インキ組成物とすることができる。また、本発明の酸化重合型オフセット印刷インキ組成物を用いて印刷した印刷物は、環境負荷が低減された印刷物とすることができる。 According to the present invention, it can be used in a lithographic printing machine of a type that uses a fountain solution that has been widely used in the past, and is stable on the machine even when the amount of organic solvent used is reduced from the conventional product. It can be set as the oxidation polymerization type offset printing ink composition excellent in the balance of stain resistance and oxidation polymerization property. Moreover, the printed matter printed using the oxidation polymerization type offset printing ink composition of the present invention can be a printed matter with reduced environmental load.
＜酸化重合型オフセット印刷インキ組成物＞
　本発明の酸化重合型オフセット印刷インキ組成物は、ワニスと、植物油と、有機溶剤と、体質顔料と、水に添加すると増粘作用を示す水溶性の親水性物質とを含み、下記（１）－（５）の条件を満足することを特徴とする。
（１）ワニスのトレランス値が３（ｍＬ／３ｇ）以上３０（ｍＬ／３ｇ）以下である。
（２）植物油の含有量が２０質量％以上５０質量％以下である。
（３）有機溶剤の含有量が０質量％以上３０質量％以下である。
（４）体質顔料の含有量が０．１質量％以上１５質量％以下である。
（５）親水性物質の含有量が０．０１質量％以上２．５質量％以下である。
以下、本発明の印刷インキ組成物について詳述する。また、簡便のため以下では酸化重合型オフセット印刷インキ組成物について、単に印刷インキ組成物ともいう。 <Oxidation polymerization type offset printing ink composition>
The oxidation polymerization type offset printing ink composition of the present invention comprises a varnish, a vegetable oil, an organic solvent, an extender pigment, and a water-soluble hydrophilic substance that exhibits a thickening action when added to water. -The condition (5) is satisfied.
(1) The tolerance value of varnish is 3 (mL / 3g) or more and 30 (mL / 3g) or less.
(2) Content of vegetable oil is 20 mass% or more and 50 mass% or less.
(3) The content of the organic solvent is 0% by mass or more and 30% by mass or less.
(4) The content of the extender pigment is 0.1% by mass or more and 15% by mass or less.
(5) The content of the hydrophilic substance is 0.01% by mass or more and 2.5% by mass or less.
Hereinafter, the printing ink composition of the present invention will be described in detail. For the sake of simplicity, hereinafter, the oxidation polymerization offset printing ink composition is also simply referred to as a printing ink composition.
　（顔料）
　本発明の印刷インキ組成物に用いる着色顔料としては特に限定されず、種々の有機顔料、無機顔料を用いることができる。例えば、イエロー顔料としては、ジスアゾイエロー（ピグメントイエロー１２、ピグメントイエロー１３、ピグメントイエロー１７、ピグメントイエロー１）、ハンザイエロー等が挙げられ、マゼンタ顔料としては、ブリリアントカーミン６B、レーキレッドC、ウォッチングレッド等が挙げられる。シアン顔料としては、フタロシアニンブルー、フタロシアニングリーン、アルカリブルー等が挙げられ、ブラック顔料としてはファーネスカーボンブラック、チャンネルブラックなどのカーボンブラック、アニリンブラック等が挙げられる。 (Pigment)
The color pigment used in the printing ink composition of the present invention is not particularly limited, and various organic pigments and inorganic pigments can be used. Examples of yellow pigments include disazo yellow (Pigment Yellow 12, Pigment Yellow 13, Pigment Yellow 17, Pigment Yellow 1), Hansa Yellow, etc., and magenta pigments include Brilliant Carmine 6B, Lake Red C, Watching Red, and the like. Is mentioned. Examples of cyan pigments include phthalocyanine blue, phthalocyanine green, and alkali blue. Examples of black pigments include carbon black such as furnace carbon black and channel black, and aniline black.
　（ワニス）
　本発明の印刷インキ組成物に用いるワニスは少なくともロジン変性フェノール樹脂を含有し、ｎ－ヘプタントレランス値が３（ｍＬ／３ｇ）以上３０（ｍＬ／３ｇ）以下である。
　トレランス値は一般的な方法で測定することができる。例えば、ワニス３ｇを２５℃に保ちながら、ｎ－ヘプタンを滴下してワニスと混合撹拌し、完全に白濁した時のｎ－へプタンの添加量（ｍＬ）がｎ－ヘプタントレランスである（単位はｍＬ／３ｇ）。 (varnish)
The varnish used in the printing ink composition of the present invention contains at least a rosin-modified phenol resin and has an n-heptane tolerance value of 3 (mL / 3 g) to 30 (mL / 3 g).
The tolerance value can be measured by a general method. For example, while maintaining 3 g of varnish at 25 ° C., n-heptane is dropped and mixed with the varnish and stirred, and the amount of n-heptane added (mL) when completely clouded is n-heptane tolerance (unit: mL / 3g).
　ワニスのトレランス値を上記の範囲とすることにより、後述する親水性物質を含む印刷インキ組成物の機上安定性や酸化重合性を好適なものとすることができる。ワニスのトレランス値が３未満であると、機上安定性が悪化することがある。ワニスのトレランス値が３０を超えると機上安定性が向上する一方、耐汚れ性が低下する。 By setting the tolerance value of the varnish within the above range, the on-machine stability and oxidative polymerization property of the printing ink composition containing a hydrophilic substance described later can be made suitable. When the tolerance value of the varnish is less than 3, the on-machine stability may be deteriorated. When the tolerance value of the varnish exceeds 30, the on-machine stability is improved while the stain resistance is lowered.
　本発明の印刷インキ組成物に用いるワニスは公知の方法で得ることができ、例えばロジン変性フェノール樹脂に後述する植物油、有機溶剤を添加して加熱溶解させ、植物油成分とのエステル交換反応および／またはアルミキレーション反応を行う方法が挙げられる。
　ロジン変性フェノール樹脂の分子量を調整したり、他の樹脂を併用したりすることでトレランス値を調整することができる。ロジン変性フェノール樹脂と併用可能な他の樹脂としては、石油樹脂、アルキッド樹脂、ロジン変性アルキッド樹脂、石油樹脂変性アルキッド樹脂、ロジンエステル樹脂等が挙げられる。また、ワニスの製造に用いる植物油成分の種類や、エステル交換反応の温度を変更することによってもワニスのトレランス値を調整することができる。 The varnish used in the printing ink composition of the present invention can be obtained by a known method. For example, a vegetable oil and an organic solvent described later are added to a rosin-modified phenol resin and dissolved by heating, and transesterification with a vegetable oil component and / or The method of performing an aluminum chelation reaction is mentioned.
The tolerance value can be adjusted by adjusting the molecular weight of the rosin-modified phenolic resin or using other resins in combination. Examples of other resins that can be used in combination with the rosin-modified phenol resin include petroleum resins, alkyd resins, rosin-modified alkyd resins, petroleum resin-modified alkyd resins, and rosin ester resins. Moreover, the tolerance value of a varnish can be adjusted also by changing the kind of vegetable oil component used for manufacture of a varnish, and the temperature of transesterification.
　（植物油）
　植物油は、従来公知のものを用いることができ、特に制限はない。大豆油、亜麻仁油、米油、キリ油、ひまし油、脱水ひまし油、コーン油、サフラワー油、南洋油桐油、カノール油等の油類及びこれらの熱重合油、酸化重合油が挙げられる。 (Vegetable oil)
A conventionally well-known thing can be used for a vegetable oil, There is no restriction | limiting in particular. Examples thereof include oils such as soybean oil, linseed oil, rice oil, tung oil, castor oil, dehydrated castor oil, corn oil, safflower oil, south sea oil paulownia oil, canol oil, and the like, and these thermal polymerization oils and oxidation polymerization oils.
　また、アマニ油脂肪酸メチルエステル、アマニ油脂肪酸エチルエステル、アマニ油脂肪酸プロピルエステル、アマニ油脂肪酸ブチルエステル、大豆油脂肪酸メチルエステル、大豆油脂肪酸エチルエステル、大豆油脂肪酸プロピルエステル、大豆油脂肪酸ブチルエステル、パーム油脂肪酸メチルエステル、パーム油脂肪酸エチルエステル、パーム油脂肪酸プロピルエステル、パーム油脂肪酸ブチルエステル、ひまし油脂肪酸メチルエステル、ひまし油脂肪酸エチルエステル、ひまし油脂肪酸プロピルエステル、ひまし油脂肪酸ブチルエステル、南洋油桐油のエステル、ラウリン酸イソブチルエステル、ラウリン酸n-ブチルエステル等の植物油脂肪酸エステルも同様に用いることができる。 Linseed oil fatty acid methyl ester, linseed oil fatty acid ethyl ester, linseed oil fatty acid propyl ester, linseed oil fatty acid butyl ester, soybean oil fatty acid methyl ester, soybean oil fatty acid ethyl ester, soybean oil fatty acid propyl ester, soybean oil fatty acid butyl ester, Palm oil fatty acid methyl ester, palm oil fatty acid ethyl ester, palm oil fatty acid propyl ester, palm oil fatty acid butyl ester, castor oil fatty acid methyl ester, castor oil fatty acid ethyl ester, castor oil fatty acid propyl ester, castor oil fatty acid butyl ester, ester of South Sea oil tung oil, Vegetable oil fatty acid esters such as lauric acid isobutyl ester and lauric acid n-butyl ester can also be used.
　植物油を原料とするエーテルとして、ジ－ｎ－オクチルエーテル、ジ－ノニルエーテル、ジヘキシルエーテル、ノニルヘキシルエーテル、ノニルブチルエーテル、ジヘプチルエーテル、ジデシルエーテル、ノニルオクチルエーテル等を用いてもよい。 Di-n-octyl ether, di-nonyl ether, dihexyl ether, nonyl hexyl ether, nonyl butyl ether, diheptyl ether, didecyl ether, nonyl octyl ether and the like may be used as ethers made from vegetable oil.
　植物油成分として、再生植物油を使用することもできる。再生植物油とは、調理等に使用された油を回収し、再生処理された植物油のことである。再生植物油としては、含水率を０．３質量％以下、ヨウ素価を９０以上、酸価を３以下として再生処理した油が好ましく、より好ましくはヨウ素価１００以上である。含水率を０．３質量％以下にすることにより水分に含まれる塩分等のインキの乳化挙動に影響を与える不純物を除去することが可能となり、ヨウ素価を９０以上として再生することにより、乾燥性、すなわち酸化重合性の良いものとすることが可能となり、さらに酸価が３以下の植物油を選別して再生することにより、インキの過乳化を抑制することが可能となる。回収植物油の再生処理方法としては、濾過、静置による沈殿物の除去、および活性白土等による脱色といった方法が例示される。 Regenerated vegetable oil can also be used as the vegetable oil component. Regenerated vegetable oil refers to vegetable oil that has been recovered by collecting oil used for cooking and the like. The regenerated vegetable oil is preferably an oil regenerated with a water content of 0.3% by mass or less, an iodine value of 90 or more, and an acid value of 3 or less, more preferably an iodine value of 100 or more. By making the water content 0.3% by mass or less, it becomes possible to remove impurities that affect the emulsification behavior of the ink, such as salt contained in moisture, and by regenerating with an iodine value of 90 or more, drying characteristics That is, it becomes possible to make it good in oxidative polymerizability, and it becomes possible to suppress over-emulsification of ink by selecting and regenerating vegetable oil having an acid value of 3 or less. Examples of the method for regenerating the recovered vegetable oil include methods such as filtration, removal of precipitates by standing, and decolorization by activated clay.
　本発明の印刷インキ組成物における植物油の含有量は、２０質量％以上５０質量％以下である。植物油の含有量を上記の範囲とすることにより、機上安定性と酸化重合性を良好なものとすることができる。 The content of vegetable oil in the printing ink composition of the present invention is 20% by mass or more and 50% by mass or less. By making the content of the vegetable oil in the above range, the on-machine stability and the oxidative polymerizability can be improved.
　（有機溶剤）
　本発明に用いられる有機溶剤は、従来公知のものを用いることができ、ＪＸ日鉱日石エネルギー社製のＡＦソルベント４号、５号、６号、７号、ＩＳＵケミカルＣｏ．ＬＴＤ製のＤＳＯＬ２４０、２６０ＳＰ、２６０Ｃ等が挙げられる。有機溶剤のＪＩＳ　Ｋ２２５４記載の蒸留試験によって得られる初留点が２３０℃以上であり、終点が３５０℃以下であることが好ましい。
　本発明の印刷インキ組成物における有機溶剤の含有量は、３０質量％以下であり、有機溶剤を全く含まなくてもよい。これにより、機上安定性と酸化重合性を両立させることができる。 (Organic solvent)
A conventionally well-known thing can be used for the organic solvent used for this invention, AF Solvent No. 4, No. 5, No. 6, No. 7, ISU Chemical Co., Ltd. made by JX Nippon Mining & Energy Corporation. Examples include DSOL240, 260SP, 260C manufactured by LTD. It is preferable that the initial boiling point obtained by the distillation test described in JIS K2254 of the organic solvent is 230 ° C. or higher and the end point is 350 ° C. or lower.
Content of the organic solvent in the printing ink composition of this invention is 30 mass% or less, and does not need to contain the organic solvent at all. Thereby, both on-machine stability and oxidative polymerization can be achieved.
　（体質顔料）
　本発明の印刷インキ組成物に用いられる体質顔料としては、特に限定されず、ろう石クレー等のクレー、タルク、硫酸バリウム、炭酸カルシウム、重質炭酸カルシウム、炭酸バリウム、炭酸マグネシウム、シリカ、ベントナイト、酸化チタン等、公知のものを１種類または２種類以上用いることができる。これらの体質顔料は、ロジン酸などにより表面処理されていてもよいし、未処理であってもよい。また、一次粒径が３０ｎｍ以上１５０ｎｍ以下であるものが好ましい。
　体質顔料を含むことにより酸化重合性を向上させることができる。本発明の印刷インキ組成物において体質顔料を過剰に添加すると、印刷中に印刷インキ組成物の過乳化を誘発し、また機上安定性が低下するため体質顔料の含有量は印刷インキ組成物の０．１質量％以上１５質量％以下であることが好ましい。 (External pigment)
The extender pigment used in the printing ink composition of the present invention is not particularly limited, and clay such as wax stone clay, talc, barium sulfate, calcium carbonate, heavy calcium carbonate, barium carbonate, magnesium carbonate, silica, bentonite, One or more known materials such as titanium oxide can be used. These extender pigments may be surface-treated with rosin acid or the like, or may be untreated. Moreover, the primary particle size is preferably 30 nm or more and 150 nm or less.
Oxidation polymerizability can be improved by including extender pigments. If an extender pigment is excessively added to the printing ink composition of the present invention, the emulsification of the print ink composition is induced during printing, and the on-machine stability is lowered. It is preferable that it is 0.1 to 15 mass%.
　（親水性物質）
　本発明の印刷インキ組成物は、固形分換算で印刷インキ組成物の０．０１質量％以上２．５質量％以下の親水性物質を含む。本発明に用いられる親水性物質は、水に添加すると増粘作用を示す、いわゆる増粘剤としての機能を備え、水には溶解するが酸化重合型オフセット印刷インキ組成物に通常用いられるような植物油や高沸点の石油系炭化水素溶剤には溶解しない親水性の物質である。その中でも、水への少量添加で増粘効果を示すものを用いることで印刷インキ組成物の保存安定性が高くなるため好ましい。このような親水性物質を含むことにより、印刷インキ組成物が水を保持しやすくなり、印刷が進むにつれて非画線部に発生する印刷インキ組成物の付着を防止することができる。一方、水を吸収してゲル状となるものの、実質的に水に溶解しない非水溶性の物質は、印刷版の非画線部との親和性が弱いため、十分な汚れ防止効果を得ることができない。 (Hydrophilic substance)
The printing ink composition of the present invention contains 0.01% to 2.5% by weight of a hydrophilic substance in terms of solid content. The hydrophilic substance used in the present invention has a function as a so-called thickening agent that exhibits a thickening action when added to water, and dissolves in water but is usually used in an oxidation polymerization type offset printing ink composition. It is a hydrophilic substance that does not dissolve in vegetable oils and high-boiling petroleum hydrocarbon solvents. Among them, it is preferable to use a material that exhibits a thickening effect when added in a small amount to water because the storage stability of the printing ink composition is increased. By including such a hydrophilic substance, the printing ink composition can easily retain water, and adhesion of the printing ink composition generated in the non-image area as printing progresses can be prevented. On the other hand, a water-insoluble substance that absorbs water and forms a gel, but does not substantially dissolve in water, has a weak affinity with the non-image area of the printing plate, so that it has a sufficient anti-smudge effect. I can't.
　親水性物質の含有量が印刷インキ組成物の２．５質量％を超えると印刷中に印刷インキ組成物に過剰の水分が取り込まれやすくなり、印刷機のローラー間や、ブランケットから版へのインキの転移性が低下し汚れの原因となったり、濃度ムラ、カスレ等の品質不良が起きやすくなる。また、親水性物質の含有量が０．０１質量％未満であると、適切に水を保持することができない。 If the content of the hydrophilic substance exceeds 2.5% by mass of the printing ink composition, excess water tends to be taken into the printing ink composition during printing, and the ink between the rollers of the printing machine or from the blanket to the plate. This lowers the transferability of the toner and causes stains, and causes poor quality such as density unevenness and blurring. Moreover, water cannot be appropriately hold | maintained as content of a hydrophilic substance is less than 0.01 mass%.
　親水性物質は、水を吸収（保水）した状態または水に溶解した状態で印刷インキ組成物に添加されることが好ましい。このような状態で親水性物質を添加し、ワニスのトレランス値や植物油、有機溶剤、体質顔料の添加量を適切な値に調整すると、親水性物質を含まない場合に比べてワニスの使用量を抑制することができる。ワニスには有機溶剤が含まれているため、ワニスの使用量を抑制することは有機溶剤の使用量を抑制することでもある。 It is preferable that the hydrophilic substance is added to the printing ink composition in a state where water is absorbed (water retention) or dissolved in water. In such a state, adding a hydrophilic substance and adjusting the tolerance value of varnish and the amount of vegetable oil, organic solvent and extender pigment added to appropriate values will reduce the amount of varnish used compared to when no hydrophilic substance is included. Can be suppressed. Since the varnish contains an organic solvent, suppressing the amount of varnish used is also suppressing the amount of organic solvent used.
　親水性物質と共に印刷インキ組成物に添加される水の量は、印刷インキ組成物の１質量％以上１５質量％以下とすることが好ましい。これにより、印刷適性や保存安定性を良好なものとすることができる。水の含有量が１質量％未満の場合は印刷適性効果が小さく、１５質量％を超えると保存安定性が悪化する。１質量％以上１０質量％以下であることがさらに好ましい。 The amount of water added to the printing ink composition together with the hydrophilic substance is preferably 1% by mass or more and 15% by mass or less of the printing ink composition. Thereby, the printability and the storage stability can be improved. When the water content is less than 1% by mass, the printability effect is small, and when it exceeds 15% by mass, the storage stability deteriorates. More preferably, it is 1 mass% or more and 10 mass% or less.
　印刷インキ組成物に添加される水は、工業用水でもよいが、保存安定性の点から物理的、化学的に殺菌処理や滅菌処理をされたものであることが好ましい。物理的な殺菌、滅菌方法としては、加熱殺菌、紫外線等による電磁波殺菌、オゾン処理、ろ過滅菌等が挙げられる。化学的な殺菌、滅菌方法としては、次亜塩素酸ナトリウム等の塩素化合物による酸化剤殺菌が挙げられる。 The water added to the printing ink composition may be industrial water, but is preferably physically or chemically sterilized or sterilized from the viewpoint of storage stability. Examples of physical sterilization and sterilization methods include heat sterilization, electromagnetic wave sterilization with ultraviolet rays, ozone treatment, filter sterilization, and the like. Examples of chemical sterilization and sterilization methods include oxidant sterilization with a chlorine compound such as sodium hypochlorite.
　本発明の印刷インキ組成物に用いられる親水性物質は、蒸留水に溶解した２質量％水溶液の粘度が２．５ｍＰａ・ｓ以上１５００ｍＰａ・ｓ以下であるか、１質量％水溶液の粘度が１０ｍＰａ・ｓ以上８０００ｍＰａ・ｓ以下であることが好ましい。このような親水性物質を用いることにより、印刷適性やインキの保存安定性の悪化を防ぐことができる。
　親水性物質の１質量％水溶液の粘度は１０ｍＰａ・ｓ以上４０００ｍＰａ・ｓ以下であることがより好ましく、１０ｍＰａ・ｓ以上２０００ｍＰａ・ｓ以下であることがさらに好ましい。 The hydrophilic substance used in the printing ink composition of the present invention has a viscosity of 2% by mass aqueous solution dissolved in distilled water of 2.5 mPa · s or more and 1500 mPa · s or less, or a viscosity of 1% by mass aqueous solution of 10 mPa · s. It is preferably s or more and 8000 mPa · s or less. By using such a hydrophilic substance, it is possible to prevent deterioration in printability and ink storage stability.
The viscosity of a 1% by mass aqueous solution of a hydrophilic substance is more preferably 10 mPa · s to 4000 mPa · s, and still more preferably 10 mPa · s to 2000 mPa · s.
　親水性物質の水溶液の粘度はＪＩＳ　Ｋ７１１７－１に記載のブルックフィールド形回転粘度計（以下Ｂ形回転粘度計とも記載する）を用いて測定する。このタイプの粘度計として東京計器株式会社製Ｂ形回転粘度計（型式ＢＭ）が挙げられる。
　具体的な測定手順は次の通りである。
１）親水性物質の水分量の測定
　親水性物質の試料１～２ｇを秤量ビンに精密にはかりとり、１０５±２℃の定温乾燥機中において４時間乾燥し、デシケーター中で冷却したのち重さを量り、その減量から次の式によって水分量（％）を算出する。
水分量（％）＝（減量（ｇ）／試料（ｇ））×１００
２）水溶液の調整
　共栓付３００ｍＬ（ミリリットル）の三角フラスコに、濃度２質量％とする場合は約４．４ｇ、濃度１質量％の場合は約２．２ｇの試料を精密にはかりとり、次式で求めた蒸留水を加えて溶解する。
２質量％水溶液を作る場合：
　加える蒸留水（ｇ）＝試料（ｇ）×（９８－水分量（％））／２
１質量％水溶液を作る場合：
　加える蒸留水（ｇ）＝試料（ｇ）×（９９－水分量（％））
３）測定
　前記の水溶液を一夜間放置後、マグネチックスターラーで約５分間かきまぜ、完全な溶液とする。
次にその溶液を口径約４５ｍｍ、高さ約１４５ｍｍのフタつき容器に移す。
次にその容器を２５±０．２℃に設定した恒温槽に３０分間入れる。
溶液が２５℃になればガラス棒でゆるくかきまぜて、Ｂ形回転粘度計の適当なローター（スピンドル）およびガードをとり付け、ローターを回転させてから３分後の目盛りを読み取る。ローターの回転数は粘度により、毎分３０回転又は６０回転とする。
粘度は次式により求める。
　粘度（ｍＰａ・ｓ）＝読み取り目盛×係数
前式の係数は使用したローターの番号及び回転数に基づき表１から求める。 The viscosity of the aqueous solution of the hydrophilic substance is measured using a Brookfield type rotational viscometer (hereinafter also referred to as B type rotational viscometer) described in JIS K7117-1. An example of this type of viscometer is a B-type rotational viscometer (model BM) manufactured by Tokyo Keiki Co., Ltd.
The specific measurement procedure is as follows.
1) Measurement of water content of hydrophilic substance Weigh 1 to 2 g of hydrophilic substance in a weighing bottle, dry it in a constant temperature dryer at 105 ± 2 ° C for 4 hours, cool in a desiccator, and then weigh And calculate the water content (%) from the weight loss by the following formula.
Moisture content (%) = (weight loss (g) / sample (g)) × 100
2) Preparation of aqueous solution In a 300 mL (milliliter) Erlenmeyer flask with a stopper, weigh accurately about 4.4 g if the concentration is 2% by mass, and about 2.2 g if the concentration is 1% by mass. Add distilled water obtained by the formula and dissolve.
When making a 2% by weight aqueous solution:
Distilled water to be added (g) = sample (g) × (98−water content (%)) / 2
When making a 1% by weight aqueous solution:
Distilled water to be added (g) = sample (g) × (99−water content (%))
3) Measurement After the above aqueous solution is left overnight, it is stirred with a magnetic stirrer for about 5 minutes to obtain a complete solution.
Next, the solution is transferred to a container with a lid having a diameter of about 45 mm and a height of about 145 mm.
Next, the container is placed in a thermostatic bath set at 25 ± 0.2 ° C. for 30 minutes.
When the solution reaches 25 ° C., gently stir with a glass rod, attach an appropriate rotor (spindle) and guard of a B-type rotational viscometer, and read the scale 3 minutes after rotating the rotor. The rotational speed of the rotor is 30 or 60 revolutions per minute depending on the viscosity.
The viscosity is determined by the following formula.
Viscosity (mPa · s) = reading scale × coefficient The coefficient of the previous equation is obtained from Table 1 based on the number of the rotor used and the number of rotations.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
　このような親水性物質としては、セルロース系化合物、多糖類、デンプン系化合物、アルギン酸系化合部、アクリル系化合物、ビニル系化合物等が挙げられる。
　セルロース系化合物としては、メチルセルロース、エチルセルロース、カルボキシメチルセルロース、ヒドロキシエチルセルロース、ヒドロキシプロピルセルロース、ヒドロキシプロピルメチルセルロース、これらセルロースにカチオン化剤を付加したカチオン化セルロース等が例示される。
　多糖類としては、アラビアガム、カラギーナン、グアガム、ペクチン、トラガント、サクラン、スピルラン、グルコマンナン、アミロース、ウェランガム（ジェランガム）、タラガム（スピノガム）、ローカストビーンガム、プルラン、ダイユータンガム、キサンタンガム、コンドロイチン硫酸ナトリウム等が例示される。
　デンプン系化合物としては、リン酸化デンプンが挙げられる。
　アルギン酸系化合物としては、アルギン酸ナトリウムが挙げられる。
　アクリル系化合物としては、ポリアクリル酸ナトリウム、カルボキシビニルポリマー、ポリアクリル酸アミド、アクリルアミド／アクリレート共重合体が例示される。
　ビニル系化合物では、ポリビニルピロリドン、ポリビニルアルコール、ポリビニルピロリドン／ビニルアルコール共重合体等が例示される。
　その他の化合物として、ポリエチレングリコール、カチオン化グアガム、ヒアルロン酸ナトリウム等を用いてもよい。
　中でも、本発明の印刷インキ組成物に用いる親水性物質としては水溶性のセルロース誘導体を用いることが好ましく、特にカルボキシメチルセルロースナトリウムを用いることが好ましい。 Examples of such hydrophilic substances include cellulose compounds, polysaccharides, starch compounds, alginic acid compounds, acrylic compounds, vinyl compounds, and the like.
Examples of the cellulose compound include methyl cellulose, ethyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxypropyl methyl cellulose, and cationized cellulose obtained by adding a cationizing agent to these celluloses.
Polysaccharides include gum arabic, carrageenan, guar gum, pectin, tragacanth, cherry, spirane, glucomannan, amylose, welan gum (gelano gum), tara gum (spin gum), locust bean gum, pullulan, duotang gum, xanthan gum, sodium chondroitin sulfate Etc. are exemplified.
Examples of the starch compound include phosphorylated starch.
Examples of the alginic acid compound include sodium alginate.
Examples of the acrylic compound include sodium polyacrylate, carboxyvinyl polymer, polyacrylamide, and acrylamide / acrylate copolymer.
Examples of the vinyl compound include polyvinyl pyrrolidone, polyvinyl alcohol, and polyvinyl pyrrolidone / vinyl alcohol copolymer.
As other compounds, polyethylene glycol, cationized guar gum, sodium hyaluronate and the like may be used.
Among these, a water-soluble cellulose derivative is preferably used as the hydrophilic substance used in the printing ink composition of the present invention, and sodium carboxymethyl cellulose is particularly preferably used.
　親水性物資としてカルボキシメチルセルロースナトリウムを用いる場合には、エーテル化度が０．４５以上のカルボキシメチルセルロースナトリウムであることが特に好ましい。このようなカルボキシメチルセルロースナトリウムは、非画線部への印刷インキ組成物の付着を防止する効果が高い。エーテル化度が０．４５より小さいと水溶性が低下し耐汚れ性が低下するおそれがある。上限については特に制限はないが、好ましくは１．４５以下であり、より好ましくは１．００以下である。 When sodium carboxymethyl cellulose is used as the hydrophilic substance, sodium carboxymethyl cellulose having an etherification degree of 0.45 or more is particularly preferable. Such sodium carboxymethylcellulose has a high effect of preventing adhesion of the printing ink composition to the non-image area. If the degree of etherification is less than 0.45, the water solubility is lowered and the stain resistance may be lowered. Although there is no restriction | limiting in particular about an upper limit, Preferably it is 1.45 or less, More preferably, it is 1.00 or less.
　ここでエーテル化度とは、無水グルコース１単位当たりのカルボキシメチル基の数をいう。無水グルコース１単位当たりのカルボキシメチル基の数が１個の場合、エーテル化度は１．０である。
　エーテル化度の測定方法の一例は次の通りである。
　試料（無水物）０．５～０．７ｇを精密にはかり、ろ紙に包んで磁製ルツボ中で灰化する。冷却したのち、これを５００ｍＬ（ミリリットル）ビーカーに移し、水を約２５０ｍＬ、さらにピペットで０．０５モル／Ｌ硫酸３５ｍＬを加えて３０分間煮沸する。
　これを冷却し、フェノールフタレイン指示薬を加えて、過剰の酸を０．１モル／Ｌ水酸化カリウムで逆滴定して、次の式によってエーテル化度を算出する。
Ａ＝（ａｆ－ｂｇ）／試料（無水物）（ｇ）－アルカリ度（または＋酸度）
エーテル化度＝１６２×Ａ／（１００００－８０Ａ）
（記号の説明）
Ａ：試料１ｇ中の結合アルカリに消費された０．０５モル／Ｌ硫酸のｍＬ
ａ：０．０５モル／Ｌ硫酸の使用ｍＬ
ｆ：０．０５モル／Ｌ硫酸の力価
ｂ：０．１モル／Ｌ水酸化カリウムの滴定ｍＬ
ｇ：０．１モル／Ｌ水酸化カリウムの力価
１６２：グルコースの分子量
８０：ＣＨ２ＣＯＯＮａ－Ｈの分子量 Here, the degree of etherification refers to the number of carboxymethyl groups per unit of anhydrous glucose. When the number of carboxymethyl groups per anhydroglucose unit is 1, the degree of etherification is 1.0.
An example of a method for measuring the degree of etherification is as follows.
A sample (anhydride) of 0.5 to 0.7 g is precisely weighed, wrapped in filter paper and incinerated in a magnetic crucible. After cooling, transfer this to a 500 mL (milliliter) beaker, add about 250 mL of water and 35 mL of 0.05 mol / L sulfuric acid with a pipette and boil for 30 minutes.
This is cooled, phenolphthalein indicator is added, excess acid is back titrated with 0.1 mol / L potassium hydroxide, and the degree of etherification is calculated by the following formula.
A = (af−bg) / sample (anhydride) (g) −alkalinity (or + acidity)
Degree of etherification = 162 × A / (10000-80A)
(Explanation of symbols)
A: mL of 0.05 mol / L sulfuric acid consumed by bound alkali in 1 g of sample
a: Use of 0.05 mol / L sulfuric acid mL
f: 0.05 mol / L sulfuric acid titer b: 0.1 mol / L potassium hydroxide titration mL
g: 0.1 mol / L potassium hydroxide titer 162: molecular weight of glucose 80: molecular weight of CH2COONa-H
　アルカリ度は次のようにして測定する。
　試料（無水物）約１ｇを３００ｍＬ三角フラスコに精密にはかりとり、水を約２００ｍＬ加えて溶かす。
これに０．０５モル／Ｌ硫酸５ｍＬをピペットで加え、１０分間煮沸したのち冷却して、フェノールフタレイン指示薬を加え、０．１モル／Ｌ水酸化カリウムで滴定する（ＳｍＬ）。同時に空試験を行い（ＢｍＬ）、次の式によって算出する。
アルカリ度＝（Ｂ－Ｓ）ｈ／試料無水物（ｇ）
ｈ：０．１モル／Ｌ水酸化カリウムの力価
なお（Ｂ－Ｓ）ｈの値が負のときにはアルカリ度を酸度と読み替える。 The alkalinity is measured as follows.
About 1 g of sample (anhydride) is accurately weighed into a 300 mL Erlenmeyer flask, and about 200 mL of water is added and dissolved.
Add 0.05 mL of 0.05 mol / L sulfuric acid with a pipette, boil for 10 minutes, cool, add phenolphthalein indicator, and titrate with 0.1 mol / L potassium hydroxide (SmL). At the same time, a blank test is performed (BmL), and the following formula is used.
Alkalinity = (B−S) h / sample anhydride (g)
h: Potency of 0.1 mol / L potassium hydroxide When the value of (B−S) h is negative, alkalinity is read as acidity.
　（助剤）
　本発明の印刷インキ組成物は、金属ドライヤー、粘度調節のためのコンパウンド、ワックス、乾燥防止剤、消泡剤、乳化適性を調整するための界面活性剤（乳化剤）、防腐剤及び殺菌剤等が例示される。 (Auxiliary)
The printing ink composition of the present invention comprises a metal dryer, a compound for adjusting viscosity, a wax, a drying inhibitor, an antifoaming agent, a surfactant (emulsifier) for adjusting emulsification suitability, a preservative, a disinfectant and the like. Illustrated.
　印刷インキ組成物には、リン酸類やその塩、クエン酸やその塩といった酸類やその塩がしばしば添加される。このような無機酸、有機酸類やその塩を添加する目的の一つは印刷版の非画線部への印刷インキ組成物の付着を防止することにある。しかしながら本発明の印刷インキ組成物にこのような酸類やその塩類を添加すると、親水性物質の水への溶解性が低下して不溶化し、保存安定性や耐汚れ性が低下するおそれがある。このため本発明の印刷インキ組成物における無機酸、有機酸類やその塩の含有量の合計は印刷インキ組成物の０．２質量％以下とすることが好ましく、０．１質量％以下とすることがより好ましく、０．０５質量％以下とすることがさらに好ましい。これにより上記のような不具合を防止することができる。 In printing ink compositions, acids such as phosphoric acids and salts thereof, citric acid and salts thereof, and salts thereof are often added. One purpose of adding such inorganic acids, organic acids and salts thereof is to prevent the printing ink composition from adhering to the non-image area of the printing plate. However, when such acids and salts thereof are added to the printing ink composition of the present invention, the solubility of the hydrophilic substance in water is lowered and insolubilized, and the storage stability and stain resistance may be lowered. Therefore, the total content of inorganic acids, organic acids and salts thereof in the printing ink composition of the present invention is preferably 0.2% by mass or less, and 0.1% by mass or less of the printing ink composition. Is more preferably 0.05% by mass or less. Thereby, the above problems can be prevented.
　なお、上述した酸類の具体例としては、リン酸、ピロリン酸、メタリン酸、ヘキサメタリン酸、ポリリン酸等のリン酸類、これらリン酸類のアンモニウム塩、アルカリ金属塩、アルカリ土類金属二水素塩、クエン酸、クエン酸のアンモニウム塩、アルカリ金属塩、マグネシウム塩などが挙げられる。 Specific examples of the acids mentioned above include phosphoric acids such as phosphoric acid, pyrophosphoric acid, metaphosphoric acid, hexametaphosphoric acid, polyphosphoric acid, ammonium salts of these phosphoric acids, alkali metal salts, alkaline earth metal dihydrogen salts, citric acid. Examples include acids, ammonium salts of citric acid, alkali metal salts, and magnesium salts.
　乳化適性を調節するために、上述した親水性物質とともに界面活性剤（乳化剤）を用いてもよい。乳化剤としては水溶性、非水溶性のいずれであっても用いることができこれらを併用してもよいが、非水溶性乳化剤を用いる場合はその含有量を平版印刷インキ組成物の１質量％未満とすることが好ましく、０．６質量％以下とすることがより好ましい。印刷時に、非水溶性乳化剤は水溶性乳化剤と異なり湿し水に溶出することなく印刷インキ中に残存する。水溶性多糖類と非水溶性乳化剤が印刷インキ組成物中で共存すると、湿し水を過剰に取り込んで印刷インキ組成物が過乳化し、水棒に絡んで湿し水の転移を阻害するなどして耐汚れ性が低下するおそれがある。非水溶性の界面活性剤（乳化剤）の含有量を上記の範囲とすることにより、このような不具合を防止することができる。 In order to adjust emulsification suitability, a surfactant (emulsifier) may be used together with the hydrophilic substance described above. As the emulsifier, either water-soluble or water-insoluble can be used, and these may be used together. However, when a water-insoluble emulsifier is used, its content is less than 1% by mass of the lithographic printing ink composition. It is preferable to set it as 0.6 mass% or less. During printing, the water-insoluble emulsifier remains in the printing ink without being eluted in the fountain solution, unlike the water-soluble emulsifier. When water-soluble polysaccharides and water-insoluble emulsifiers coexist in the printing ink composition, the dampening water is taken in excessively, the printing ink composition is over-emulsified, and entangled with the water rod to inhibit the transfer of the dampening water. As a result, the stain resistance may be reduced. By setting the content of the water-insoluble surfactant (emulsifier) in the above range, such a problem can be prevented.
　水溶性の乳化剤としては、従来公知のものを用いることができ特に限定されないが、一例としてトリデカノール、２－ヘキシルオクタノール、２－ヘキシルデカノール、２－オクチルデカノール、又はヘキシルジグリコールなどが挙げられる。
　非水溶性の乳化剤の具体例としては、モノオレイン酸ソルビタン、モノオレイン酸グリセリン、ポリオキシエチレンクミルフェニルエーテル等が例示される。このような乳化剤は市販品としても入手可能であり、例えば花王製レオドールＳＰ－０１０Ｖ、レオドールＳＰ－０３０Ｖや、日本乳化剤社製ニューコールＣＭＰ－１が挙げられる。 As the water-soluble emulsifier, conventionally known emulsifiers can be used and are not particularly limited, and examples thereof include tridecanol, 2-hexyloctanol, 2-hexyldecanol, 2-octyldecanol, and hexyl diglycol.
Specific examples of the water-insoluble emulsifier include sorbitan monooleate, glycerin monooleate, polyoxyethylene cumylphenyl ether and the like. Such emulsifiers are also available as commercial products, and examples thereof include Kao's Rheodor SP-010V and Rhedol SP-030V, and Nippon Emulsifier Newcol CMP-1.
　金属ドライヤーとしては、酸化重合乾燥型印刷インキに通常用いられるものならば、いずれでも良い。例えば、コバルト、マンガン、鉛、鉄、亜鉛、カルシウム、セリウム、レアアース等の金属と、オクチル酸、ナフテン酸、ネオデカン酸、桐油酸、アマニ油酸、大豆油酸、樹脂酸等のカルボン酸との塩、すなわち金属石鹸、あるいは、コバルト、マンガン、鉛、鉄、亜鉛、カルシウム、セリウム、レアアース等の金属とのホウ酸塩等が用いられる。これらのドライヤーを単独で用いても良いし、2種類以上を組み合わせて用いても良い。  As the metal dryer, any metal dryer may be used as long as it is usually used for oxidative polymerization drying type printing ink. For example, with metals such as cobalt, manganese, lead, iron, zinc, calcium, cerium, rare earth, and carboxylic acids such as octyl acid, naphthenic acid, neodecanoic acid, tung oil acid, linseed oil acid, soybean oil acid, resin acid, etc. A salt, that is, a metal soap, or a borate with a metal such as cobalt, manganese, lead, iron, zinc, calcium, cerium, or rare earth is used. These dryers may be used alone or in combination of two or more.
　＜製造方法＞
　本発明の印刷インキ組成物は、例えば、本発明のロジン変性フェノール樹脂を含む樹脂、植物油、石油系溶剤等を用いて調整したワニスに、着色顔料、体質顔料、溶剤および他の添加剤を添加し、攪拌機で充分にプレミキシングを行なった後、ショットミル、ロールミル等で練肉を行う。練肉後、ワニス、石油系溶剤、植物油、親水性物質、その他ワックス、酸化防止剤、乳化剤等の助剤を添加し、充分に攪拌混合して製造する。親水性物質は、予めミキサーなどを用いて水と均一になるまで攪拌して水溶液としてから添加することが好ましい。
　これらの原料は印刷インキ組成物に必要とされる粘度や流動性に合わせて使用量を調整する。また、これらの原料の添加時期は固定されたものではなく、混合状態に基づいて適切に調整される。 <Manufacturing method>
The printing ink composition of the present invention includes, for example, a color pigment, an extender pigment, a solvent and other additives added to a varnish prepared using a resin containing the rosin-modified phenolic resin of the present invention, a vegetable oil, a petroleum solvent, etc. Then, after sufficiently premixing with a stirrer, the meat is kneaded with a shot mill, a roll mill or the like. After kneading, varnish, petroleum solvent, vegetable oil, hydrophilic substance, other auxiliary agents such as wax, antioxidant, emulsifier and the like are added, and the mixture is sufficiently stirred and mixed. It is preferable to add the hydrophilic substance in advance using a mixer or the like until it is stirred with water until it is uniform with water.
The amount of these raw materials is adjusted according to the viscosity and fluidity required for the printing ink composition. Moreover, the addition time of these raw materials is not fixed, but is appropriately adjusted based on the mixed state.
　＜印刷物、印刷方法＞
　本発明の印刷物は、上述したような印刷インキ組成物を用いて平版オフセット印刷機により印刷させて得られる。基材としては特に制限はなく、従来公知のものを用いることができる。 <Printed matter, printing method>
The printed matter of the present invention is obtained by printing with a lithographic offset printing machine using the printing ink composition as described above. There is no restriction | limiting in particular as a base material, A conventionally well-known thing can be used.
　以下、実施例と比較例により本発明を説明するが、本発明はこれに限定されるものではない。なお、以下において部、％は特に断りのない限り質量基準によるものである。 Hereinafter, although an example and a comparative example explain the present invention, the present invention is not limited to this. In the following, parts and% are based on mass unless otherwise specified.
１．ワニスの調整
　ハイロスＯＲ－１４１０（ロジン変性フェノール樹脂、星光ＰＭＣ（株）製）４３％、大豆白絞油（日清オイリオ（株）製）２６．４％、ＡＦソルベント６号（ＪＸ日鉱日石エネルギー（株）製）３０％を加熱して溶解、エステル交換反応を行った。これにＡＬＣＨ（アルミニウムエチルアセテート・ジイソプロピレート、川研ファインケミカル（株）製）０．５％、ジブチルヒドロキシトルエン（ＢＨＴ）０．１％を添加してキレーションを行い、トレランス値が２５（ｍＬ／３ｇ）のワニス１を調整した。
　配合を表２のように変更した以外はワニス１と同様にして、ワニス２～８を調整した。
　また、表２においてＯＲ－３７２、ＯＲ－３７５はそれぞれハイロスＯＲ－３７２、ハイロスＯＲ－３５７（ロジン変性フェノール樹脂、いずれも星光ＰＭＣ（株）製）、１１２６－ＨＶはベッカサイト１１２６－ＨＶ（ロジン変性フェノール樹脂、ＤＩＣ（株）製）である。 1. Adjustment of varnish High loss OR-1410 (rosin-modified phenolic resin, manufactured by Seiko PMC Co., Ltd.) 43%, soybean white oil (Nisshin Oilio Co., Ltd.) 26.4%, AF Solvent No. 6 (JX Nippon Mining & Petrochemicals) 30% Energy (made by Energy Co., Ltd.) was heated to dissolve and transesterify. ALCH (aluminum ethyl acetate diisopropylate, manufactured by Kawaken Fine Chemical Co., Ltd.) 0.5% and dibutylhydroxytoluene (BHT) 0.1% were chelated to give a tolerance value of 25 (mL / mL). 3 g) of varnish 1 was prepared.
Varnishes 2 to 8 were prepared in the same manner as Varnish 1 except that the formulation was changed as shown in Table 2.
In Table 2, OR-372 and OR-375 are high-loss OR-372 and high-loss OR-357 (rosin-modified phenol resin, both manufactured by Seiko PMC Co., Ltd.), and 1126-HV is becacite 1126-HV (rosin Modified phenolic resin, manufactured by DIC Corporation).
Figure JPOXMLDOC01-appb-T000002
Figure JPOXMLDOC01-appb-T000002
２．親水性物質の水溶液の調整
　エーテル化度が０．４８、１質量％水溶液の粘度が１２ｍＰａ・ｓのＣＭＣ２．５部を９７．５部の水道水に溶解させて親水性物質の水溶液１とした。また、用いる親水性物質と配合量を表３のようにした以外は親水性物質の水溶液１と同様にして親水性物質の水溶液２－８を調整した。これをインキの調整に用いた。簡便のため、以下では親水性物質の水溶液１－７を、単に水溶液１－７とする。
　なお、表３においてＨＥＣはヒドロキシエチルセルロースである。１％粘度、２％粘度はそれぞれ、親水性物質の１質量％水溶液の粘度と２質量％水溶液の粘度を意味し、単位はｍＰａ・ｓである。親水性物質はいずれも乾燥純分が９９％以上のものを用いた。 2. Preparation of aqueous solution of hydrophilic substance 2.5 parts of CMC having a degree of etherification of 0.48 and a 1% by weight aqueous solution of 12 mPa · s were dissolved in 97.5 parts of tap water to obtain an aqueous solution 1 of hydrophilic substance. . Further, a hydrophilic substance aqueous solution 2-8 was prepared in the same manner as the hydrophilic substance aqueous solution 1 except that the hydrophilic substance used and the blending amount thereof were as shown in Table 3. This was used for ink preparation. For the sake of simplicity, hereinafter, the aqueous solution 1-7 of the hydrophilic substance is simply referred to as the aqueous solution 1-7.
In Table 3, HEC is hydroxyethyl cellulose. 1% viscosity and 2% viscosity mean the viscosity of a 1% by weight aqueous solution and the viscosity of a 2% by weight aqueous solution of a hydrophilic substance, respectively, and the unit is mPa · s. As the hydrophilic substances, those having a dry purity of 99% or more were used.
Figure JPOXMLDOC01-appb-T000003
Figure JPOXMLDOC01-appb-T000003
３．インキの調整
　ＦＡＳＴＯＧＥＮ ＢＬＵＥ ＦＡ５３７５（有機顔料、ＤＩＣ（株）製）：１３部、ハクエンカＴ－ＤＤ（炭酸カルシウム、白石工業（株）製）：７部、ワニス１：１０部、ワニス２：４２．８部、ＡＦソルベント６号：３．５部を、３本ロールミルを用いて練肉し、ＪＩＳＫ５７０１－１に記載の練和度試験にて、出来上がったベースインキの練和度の位置Ａの目盛が３以下になるように調整した。さらに、ワックス（平均粒径5ミクロンのポリテトラフルオロエチレンワックス）：０．５部、ワニス１：１１．５部、ＡＦソルベント６号：２部、DICNATE ２５０５ＳＢ（金属石鹸、DIC(株)製）１．０部、水溶液１：８．７部を添加し、ミキサーを用いて均一に混合分散して実施例１の印刷インキ組成物を得た。
　配合を表４－７のように変更した以外は実施例１と同様にして実施例１－１３、比較例１－１０、参考例１、２の印刷インキ組成物を調整した。なお、表４－７中の配合量は、小数点第２位を四捨五入した値である。ただし、実施例１２のリン酸については小数点第３位を四捨五入している。 3. Ink adjustment FASTOGEN BLUE FA5375 (organic pigment, manufactured by DIC Corporation): 13 parts, Hakuenka T-DD (calcium carbonate, manufactured by Shiraishi Kogyo Co., Ltd.): 7 parts, varnish 1:10 parts, varnish 2:42. 8 parts, AF Solvent No. 6: 3.5 parts are kneaded using a three-roll mill, and a scale of position A of the degree of kneading of the finished base ink in the kneading degree test described in JISK5701-1 Was adjusted to 3 or less. Furthermore, wax (polytetrafluoroethylene wax having an average particle size of 5 microns): 0.5 parts, varnish 1: 11.5 parts, AF solvent 6: 2 parts, DICNATE 2505SB (metal soap, manufactured by DIC Corporation) 1.0 part and 1: 8.7 part of aqueous solution were added, and it mixed and dispersed uniformly using the mixer, and obtained the printing ink composition of Example 1.
The printing ink compositions of Example 1-13, Comparative Example 1-10, and Reference Examples 1 and 2 were prepared in the same manner as in Example 1 except that the formulation was changed as shown in Table 4-7. In Table 4-7, the blending amounts are values rounded off to the first decimal place. However, for the phosphoric acid of Example 12, the third decimal place is rounded off.
　実施例１２、比較例９では８５％濃度のリン酸水溶液（和光純薬製）を使用した。表中のリン酸の配合量は、８５％水溶液の配合量を意味する。
　実施例１３、比較例１０には、モノオレイン酸グリセリン（花王製　レオドール　ＳＰ－０３０Ｖ）を非水溶性乳化剤として用いた。
　比較例８には親水性物質の水溶液に替えて、食品用のこんにゃく（水酸化カルシウムによってグルコマンナンを非水溶性にしたもの。含水率９７％）を潰したものを用いた。 In Example 12 and Comparative Example 9, an 85% aqueous phosphoric acid solution (manufactured by Wako Pure Chemical Industries) was used. The amount of phosphoric acid in the table means the amount of 85% aqueous solution.
In Example 13 and Comparative Example 10, glyceryl monooleate (Rheidol SP-030V manufactured by Kao) was used as a water-insoluble emulsifier.
In Comparative Example 8, instead of an aqueous solution of a hydrophilic substance, a konjac for food (a product in which glucomannan was made water-insoluble with calcium hydroxide; water content 97%) was used.
Figure JPOXMLDOC01-appb-T000004
Figure JPOXMLDOC01-appb-T000004
Figure JPOXMLDOC01-appb-T000005
Figure JPOXMLDOC01-appb-T000005
Figure JPOXMLDOC01-appb-T000006
Figure JPOXMLDOC01-appb-T000006
Figure JPOXMLDOC01-appb-T000007
Figure JPOXMLDOC01-appb-T000007
　４．評価
　調整した実施例、比較例、参考例の印刷インキ組成物を下記のようにして評価し、表８－１１にまとめた。表８－１１におけるインキ中の植物油、インキ中の有機溶剤、インキ中の体質顔料、インキ中の親水性物質、インキ中の水分、リン酸、非水溶性乳化剤の単位は質量％である。参考例２における括弧内の数値は、印刷インキ組成物に含まれる大豆油脂肪酸ｎ－ブチルエステルのみの含有量である。 4). Evaluation The adjusted printing ink compositions of Examples, Comparative Examples, and Reference Examples were evaluated as follows and are summarized in Tables 8-11. The units of vegetable oil in ink, organic solvent in ink, extender pigment in ink, hydrophilic substance in ink, moisture in ink, phosphoric acid, and water-insoluble emulsifier in Table 8-11 are mass%. The numerical value in parentheses in Reference Example 2 is the content of only soybean oil fatty acid n-butyl ester contained in the printing ink composition.
（有機溶剤削減率）
　次式のようにして有機溶剤削減率（％）を算出した。 (Organic solvent reduction rate)
The organic solvent reduction rate (%) was calculated according to the following formula.
Figure JPOXMLDOC01-appb-M000008
 上記式中、「印刷インキ組成物中の有機溶剤の含有量」はＡＦソルベント６号の合計量であり、ワニス及びベースインキ中のＡＦソルベント６号を合計して求めた。
Figure JPOXMLDOC01-appb-M000008
 In the above formula, “content of the organic solvent in the printing ink composition” is the total amount of AF solvent No. 6, and the total amount of AF solvent No. 6 in the varnish and the base ink was determined.
（機上安定性）
　実施例、比較例、参考例の印刷インキ組成物を、インコメーター（（株）東洋精機製作所製）を使用し、インキ量０．５ｃｃ、室温２５℃、ローラー温度３２℃、回転数１２００ｒｐｍの条件下で印刷インキ組成物が剥げ始めるまでの時間を測定し、参考例の印刷インキ組成物との比較で相対評価した。剥げ始めるまでの時間が長いものほど、機上安定性に優れると評価できる。参考例の印刷インキ組成物を標準とし、これと比較して３段階で相対評価した。
　優れる：参考例１の印刷インキ組成物よりも長い。
　標準並み：参考例１の印刷インキ組成物と同程度。
　劣る：参考例１の印刷インキ組成物よりも短い。 (Onboard stability)
The printing ink compositions of Examples, Comparative Examples, and Reference Examples were used with an incometer (manufactured by Toyo Seiki Seisakusho Co., Ltd.) under conditions of ink amount 0.5 cc, room temperature 25 ° C., roller temperature 32 ° C., and rotation speed 1200 rpm. The time until the printing ink composition began to peel off was measured below, and the relative evaluation was made by comparison with the printing ink composition of Reference Example. It can be evaluated that the longer it takes to start peeling, the better the on-machine stability. The printing ink composition of the reference example was used as a standard, and relative evaluation was performed in three stages in comparison with this.
Excellent: longer than the printing ink composition of Reference Example 1.
Standard: Same as the printing ink composition of Reference Example 1.
Inferior: shorter than the printing ink composition of Reference Example 1.
（耐汚れ性）
　ローランド７０４印刷機（セパレート連続給水方式、マンローランド社製）を使用し、印刷速度８０００枚／時で印刷した後一旦停止した。一時間放置した後印刷を再開した際の印刷物の非画線部の汚れ解消具合を調べ、３段階で評価した。なお、用いた印刷版はＫｏｄａｋ　Ｓｗｏｒｄ　ＸＤ－Ｒ（コダック合同会社製）、湿し水はプレサートＷＤ１００（Ｈ液、ＤＩＣ株式会社製）を水で濃度１．０％に希釈したものを用い、用紙はＯＫトップコート＋（米坪　１０４．７ｇ／ｍ２　王子製紙株式会社製）を用いた。室温は２５℃、湿度は５０～６０％であった。
　○：インキの汚れが非画線部からすぐ消える。
　△：インキの汚れが若干残る。
　×：インキの汚れが残る。 (Stain resistance)
Using a Roland 704 printer (separate continuous water supply system, manufactured by Man Roland), printing was performed at a printing speed of 8000 sheets / hour, and then temporarily stopped. When the printing was resumed after being left for one hour, the degree of stain removal in the non-image area of the printed matter was examined and evaluated in three stages. The printing plate used was Kodak Word XD-R (manufactured by Kodak Godo Kaisha), and the dampening water used was a presert WD100 (liquid H, manufactured by DIC Corporation) diluted with water to a concentration of 1.0%. Used an OK top coat + (US tsubo 104.7 g / m 2 manufactured by Oji Paper Co., Ltd.). The room temperature was 25 ° C. and the humidity was 50-60%.
○: The ink stain disappears immediately from the non-image area.
Δ: Some ink stains remain.
X: Ink stains remain.
（酸化重合性）
　ＪＩＳ　Ｋ５７０１－１附属書３に記載の展色装置（ＲＩテスター）を用いて２分割ゴムローラーにて印刷インキ組成物０．１２５ｍＬをＯＫトップコート＋（王子製紙株式会社製）に展色した。展色２４時間後にＪＩＳ　Ｋ５７０１－１記載の学振形摩擦試験機を用いて各インキ組成物の展色面を荷重５００ｇで１０回擦り、以下の基準に従い３段階で評価した。
　優れる：参考例１の印刷インキ組成物よりも磨耗が少ない。
　標準並み：参考例１の印刷インキ組成物と同程度である。
　劣る：参考例１の印刷インキ組成物よりも磨耗が多い。 (Oxidative polymerization)
Using a color developing device (RI tester) described in JIS K5701-1 Annex 3, 0.125 mL of the printing ink composition was developed on an OK top coat + (manufactured by Oji Paper Co., Ltd.) with a two-part rubber roller. After 24 hours of color development, the developed surface of each ink composition was rubbed 10 times with a load of 500 g using a Gakushin type friction tester described in JIS K5701-1, and evaluated in three stages according to the following criteria.
Excellent: Less wear than the printing ink composition of Reference Example 1.
Standard: Same as the printing ink composition of Reference Example 1.
Inferior: More abrasion than the printing ink composition of Reference Example 1.
（保存安定性）
　２５℃、相対湿度５０％で３ヶ月間保管した印刷インキ組成物１．０ｇをフーバーマラーに置き、１．１Ｋｇの重量で１００回転練肉した。練肉後の印刷インキ組成物をインキナイフでこすり取って観察し、以下の基準に従い３段階で評価した。
　３：印刷インキ組成物から分離した水滴はほとんど見られず良好である。
　２：印刷インキ組成物から分離した微小な水滴が見られるが実用上は問題ない。
　１：印刷インキ組成物から分離した水滴が多く見られ、実用に耐えない。
　　　またはゲル状物質が多く見られ、実用に耐えない。 (Storage stability)
1.0 g of a printing ink composition stored at 25 ° C. and 50% relative humidity for 3 months was placed in a Hoover Muller and kneaded 100 revolutions at a weight of 1.1 kg. The printing ink composition after kneaded meat was scraped with an ink knife and observed, and evaluated in three stages according to the following criteria.
3: Almost no water droplets separated from the printing ink composition are seen, which is good.
2: Although fine water droplets separated from the printing ink composition are seen, there is no problem in practical use.
1: Many water droplets separated from the printing ink composition are seen, which is not practical.
Or many gel-like substances are seen and it cannot endure practical use.
Figure JPOXMLDOC01-appb-T000009
Figure JPOXMLDOC01-appb-T000009
Figure JPOXMLDOC01-appb-T000010
Figure JPOXMLDOC01-appb-T000010
Figure JPOXMLDOC01-appb-T000011
Figure JPOXMLDOC01-appb-T000011
Figure JPOXMLDOC01-appb-T000012
Figure JPOXMLDOC01-appb-T000012
　実施例、比較例から明らかなように、本発明の酸化重合型オフセット印刷インキ組成物は従来の印刷インキ組成物と同等かそれ以上の性能を維持しつつ、有機溶剤の使用量が大幅に削減されたものとなった。
　一方、親水性物質を含有するが、ワニスのトレランス値、植物油、有機溶剤、体質顔料、親水性物質、水の含有量が本発明の範囲外である比較例１、２、４－７の印刷インキ組成物は、酸化重合型のオフセット印刷に必要な特性の全てを満足することはできなかった。また、ワニスのトレランス値、植物油、有機溶剤、体質顔料の含有量が本発明の範囲内であっても、親水性物質を含まない比較例３、水溶性の親水性物質に替えて増粘作用を示す非水溶性の物質を用いた比較例８も同様であった。また、ワニスのトレランス値、植物油、有機溶剤、体質顔料、水溶性の親水性物質の含有量が本発明の範囲内であっても、リン酸や非水溶性乳化剤の添加量が多い比較例９－１０も同様であった。 As is clear from the examples and comparative examples, the oxidation polymerization type offset printing ink composition of the present invention greatly reduces the amount of organic solvent used while maintaining the same or better performance than the conventional printing ink composition. It became what was done.
On the other hand, printing of Comparative Examples 1, 2, and 4-7, which contain a hydrophilic substance, but whose varnish tolerance value, vegetable oil, organic solvent, extender pigment, hydrophilic substance, and water content are outside the scope of the present invention The ink composition could not satisfy all of the characteristics required for the oxidation polymerization type offset printing. Further, even if the tolerance value of the varnish, the vegetable oil, the organic solvent, and the extender pigment are within the scope of the present invention, the thickening action is performed in place of the comparative example 3, which does not contain a hydrophilic substance, and the water-soluble hydrophilic substance. The same was true for Comparative Example 8 using a water-insoluble substance. Further, even when the tolerance value of the varnish, the vegetable oil, the organic solvent, the extender pigment, and the content of the water-soluble hydrophilic substance are within the scope of the present invention, Comparative Example 9 in which the addition amount of phosphoric acid and the water-insoluble emulsifier is large. The same was true for -10.

Claims (8)

  1. 　ワニスと、植物油と、有機溶剤と、体質顔料と、水に添加すると増粘作用を示す水溶性の親水性物質とを含み、下記（１）－（５）の条件を満足することを特徴とする酸化重合型オフセット印刷インキ組成物。
    （１）ワニスのトレランス値が３（ｍＬ／３ｇ）以上３０（（ｍＬ／３ｇ）以下である。
    （２）植物油の含有量が２０質量％以上５０質量％以下である。
    （３）有機溶剤の含有量が０質量％以上３０質量％以下である。
    （４）体質顔料の含有量が０．１質量％以上１５質量％以下である。
    （５）親水性物質の含有量が０．０１質量％以上２．５質量％以下である。     It includes a varnish, a vegetable oil, an organic solvent, an extender, and a water-soluble hydrophilic substance that exhibits a thickening action when added to water, and satisfies the following conditions (1) to (5): An oxidation polymerization offset printing ink composition.
    (1) The tolerance value of varnish is 3 (mL / 3g) or more and 30 ((mL / 3g) or less.
    (2) Content of vegetable oil is 20 mass% or more and 50 mass% or less.
    (3) The content of the organic solvent is 0% by mass or more and 30% by mass or less.
    (4) The content of the extender pigment is 0.1% by mass or more and 15% by mass or less.
    (5) The content of the hydrophilic substance is 0.01% by mass or more and 2.5% by mass or less.
  2. 　さらに水を含み、前記水の含有量が前記酸化重合型オフセット印刷インキ組成物の１質量％以上１５質量％以下であることを特徴とする請求項１に記載の酸化重合型オフセット印刷インキ組成物。 2. The oxidation polymerization offset printing ink composition according to claim 1, further comprising water, wherein the water content is 1% by mass or more and 15% by mass or less of the oxidation polymerization offset printing ink composition. .
  3. 　前記親水性物質は２質量％水溶液の粘度が２．５ｍＰａ・ｓ以上１５００ｍＰａ・ｓ以下であるか、１質量％水溶液の粘度が１０ｍＰａ・ｓ以上８０００ｍＰａ・ｓ以下であることを特徴とする請求項１に記載の酸化重合型オフセット印刷インキ組成物。 The hydrophilic substance is characterized in that the viscosity of a 2% by mass aqueous solution is 2.5 mPa · s or more and 1500 mPa · s or less, or the viscosity of a 1% by mass aqueous solution is 10 mPa · s or more and 8000 mPa · s or less. The oxidation polymerization offset printing ink composition according to 1.
  4. 　前記親水性物質はエーテル化度が０．４５以上のカルボキシメチルセルロースナトリウムであることを特徴とする請求項１に記載の酸化重合型オフセット印刷インキ組成物。 2. The oxidation polymerization offset printing ink composition according to claim 1, wherein the hydrophilic substance is sodium carboxymethyl cellulose having a degree of etherification of 0.45 or more.
  5. 　無機酸、無機酸の塩、有機酸、有機酸の塩の含有量が前記酸化重合型オフセット印刷インキ組成物の０．２質量％以下であることを特徴とする請求項１乃至４のいずれか一項に記載の酸化重合型オフセット印刷インキ組成物。 5. The content of an inorganic acid, an inorganic acid salt, an organic acid, or an organic acid salt is 0.2% by mass or less of the oxidation polymerization type offset printing ink composition. The oxidation polymerization offset printing ink composition according to one item.
  6. 　非水溶性乳化剤の含有量が前記酸化重合型オフセット印刷インキ組成物の１質量％未満であることを特徴とする請求項１乃至５のいずれか一項に記載の酸化重合型オフセット印刷インキ組成物。 6. The oxidation polymerization offset printing ink composition according to claim 1, wherein the content of the water-insoluble emulsifier is less than 1% by mass of the oxidation polymerization offset printing ink composition. .
  7. 　ワニスと、植物油と、有機溶剤と、体質顔料と、水に添加すると増粘作用を示す水溶性の親水性物質とを含み、下記（１）－（５）の条件を満足する酸化重合型オフセット印刷インキ組成物の製造方法であって、前記親水性物質を水に溶解させて添加することを特徴とする酸化重合型オフセット印刷インキ組成物の製造方法。
    （１）ワニスのトレランス値が３（ｍＬ／３ｇ）以上３０（ｍＬ／３ｇ）以下である。
    （２）植物油の含有量が２０質量％以上５０質量％以下である。
    （３）有機溶剤の含有量が０質量％以上３０質量％以下である。
    （４）体質顔料の含有量が０．１質量％以上１５質量％以下である。
    （５）親水性物質の含有量が０．０１質量％以上２．５質量％以下である。     Oxidation-polymerized offset containing varnish, vegetable oil, organic solvent, extender pigment, and water-soluble hydrophilic substance that exhibits a thickening action when added to water and satisfies the following conditions (1)-(5) A method for producing a printing ink composition, wherein the hydrophilic substance is dissolved in water and added.
    (1) The tolerance value of varnish is 3 (mL / 3g) or more and 30 (mL / 3g) or less.
    (2) Content of vegetable oil is 20 mass% or more and 50 mass% or less.
    (3) The content of the organic solvent is 0% by mass or more and 30% by mass or less.
    (4) The content of the extender pigment is 0.1% by mass or more and 15% by mass or less.
    (5) The content of the hydrophilic substance is 0.01% by mass or more and 2.5% by mass or less.
  8. 　請求項１乃至６のいずれか一項に記載の酸化重合型オフセット印刷インキ組成物を用いて印刷されたことを特徴とする印刷物。 A printed matter printed using the oxidation polymerization type offset printing ink composition according to any one of claims 1 to 6.
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