JP2001123100A - Ink composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ink composition which is dried by oxidative polymerization and/or ultraviolet curing. SOLUTION: This composition is a mixture of (A) a vehicle consisting of an oxidatively polymerizable film-forming material and an ink solvent with (B) a (meth)acrylic oligomer and/or a (meth)acrylic monomer provided that the wt. ratio of A/B is such that when n-hexane is added to the composition, the resultant mixture starts to be cloudy when the amount of n-hexane added reaches 50-600 pts.vol. based on 100 pts.vol. composition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a photopolymerization drying method for printing printed materials such as packages, publications, posters, etc., which is excellent in drying property, can respond to high-speed printing, and can provide inexpensive printed materials with good productivity. The present invention relates to an ink composition having composite drying characteristics such as oxidative polymerization drying and osmotic drying.

[0002]

2. Description of the Related Art In general, when drying a printing ink, the ink is changed from a liquid state to a solid state by a chemical and / or physical change depending on a vehicle component constituting the ink, and is set on a printing medium. As the drying method of the printing ink, drying methods such as osmotic drying, evaporation drying, thermal polymerization drying, oxidation polymerization drying, and photopolymerization drying are appropriately adopted depending on the type of the printing ink and the printing method.

[0003] In penetrating drying, when ink is printed on an absorbent support such as paper, the vehicle penetrates into the support to form a coating of the ink and dry. For example, newspaper printing and the like can be mentioned. In the evaporative drying, the solvent in the vehicle evaporates after printing to form a film of ink and is dried. Examples include gravure printing and oil-based offset rotary printing. In oxidative polymerization drying, in an ink mainly composed of a drying oil such as linseed oil or a polymerized drying oil, after printing, the vehicle undergoes an oxidative polymerization reaction with oxygen in the air to form an ink film and dry. Examples include oil-based offset sheet-fed printing of packages, publications, posters, and the like. Thermal polymerization drying is an ink containing a resin with a low degree of polymerization as the main component.
The resin having a low degree of polymerization is highly polymerized by heating or a catalyst to form a film of the ink and then dried. In photopolymerization drying, the vehicle is instantaneously cured and dried by irradiating ultraviolet rays to the printing ink.
Conventionally, as a lithographic ink used in offset sheet-fed printing (lithographic printing), either an oxidative polymerization drying type ink or an ultraviolet curing drying type ink is mainly used.

However, conventional lithographic inks are mainly oxidatively polymerized inks that cure and dry by reacting oxygen in the air with unsaturated bonds in fatty acid portions of vegetable drying oils such as tung oil and linseed oil. Although it is used, this oxidative polymerization drying is slow in drying, and depending on the conditions, it may take several tens of hours for drying, and there is a problem in workability. In the case of this ink, the drying speed is increased by including a large amount of the oxidation polymerization catalyst, but the ink dries on a printing machine depending on conditions. In addition, when the humidity becomes high, the drying becomes slow. In offset printing, since the printing is performed using dampening water, the damping water in the non-image area is absorbed by the paper of the printing medium and the internal relative humidity increases, and the delay in drying becomes more prominent. Further, when the paper surface as a printing medium is acidic, drying tends to be slow, and a decrease in gloss, a decrease in abrasion resistance and the like are exhibited. The decrease in the drying property of the ink is caused by the occurrence of wear in the rotary printing press, and the poor suitability for stacking in the sheet-fed printing press.
Since the set-off of the ink to the printing medium occurs, operations such as extending the drying time and sprinkling powder such as treated starch on the printing surface as an set-off preventing agent are performed.
Printing productivity decreases. In addition, oxidation-polymerization drying type lithographic inks mainly use vegetable drying oils such as linseed oil and soybean oil as vehicles, and thus have abrasion resistance, weather resistance, chemical resistance, etc. Performance may not be enough.

The lithographic ink of the ultraviolet curing and drying type is
Drying and curing are fast, and the physical properties such as abrasion resistance of the printed surface are excellent, but compared to the oxidative polymerization drying type lithographic ink,
There are problems such as a decrease in pigment dispersibility, printability, adhesion to a printing substrate, odor due to residual monomers, and high price.
In printing with a lithographic ink of the oxidation polymerization drying type or the ultraviolet polymerization drying type, oil-based ink is used if the ink used in the printing press is an oxidation polymerization drying type, and U is used if the ultraviolet polymerization drying type is used.
It is necessary to change the ink by cleaning the V ink and the printing press each time, and the workability is poor and the efficiency is reduced.
In addition, a mixture of an oil-based ink of the oxidation polymerization drying type and a UV ink of the ultraviolet polymerization drying type shows whitening of the printed surface (the printed surface looks cloudy) due to poor compatibility after printing, It could not be put to practical use.

Accordingly, the drying property is fast and inexpensive in accordance with the speeding up of the printing press, and the pigment dispersibility, printing suitability, adhesion to the printing substrate, and residual monomer are comparable to those of the oxidative polymerization drying type ink. It is desired to provide an odorless ink composition. Therefore, the mixture of the oxidative polymerization drying type oil-based ink and the ultraviolet polymerization drying type UV ink so far,
Although these compositions have been proposed as ink compositions, these compositions have poor compatibility of both components and become an unstable ink system, so whitening of the printed surface (the printed surface looks cloudy), development of matte, Alternatively, there is provided an ink composition which is superior in drying property to a conventional lithographic ink without causing poor transferability or poor quality expression due to thickening or tightening on a printing machine, and without impairing printability, quality, price, etc. It is not at present.

[0007]

DISCLOSURE OF THE INVENTION The present invention relates to an ink composition having a drying property in which a pigment dispersion comparable to conventional oxidative polymerization and drying type oil-based inks mainly composed of vegetable oils such as linseed oil, tung oil and soybean oil is provided. In addition to its oil-based ink, it dries faster than these oil-based inks and can print without sprinkling powder such as treated starch on the printing surface as an anti-setoff agent. It is intended to provide an ink composition having excellent workability and the like.

[0008]

The present inventors have made intensive studies to solve the above-mentioned problems, and as a result, have found that a vehicle comprising an oxidized polymerized film forming material and an ink solvent (hereinafter referred to as A component).
In the ink composition composed of a (meth) acrylic oligomer and / or a (meth) acrylic monomer (hereinafter, referred to as a B component), the composition of the A component and the B component is set to a specific range, whereby photopolymerization drying and oxidation are performed. It has combined drying characteristics such as polymerization drying and osmosis drying, and is faster than the drying speed of oxidative polymerization drying type ink mainly composed of vegetable oil such as linseed oil, tung oil, soybean oil, etc. It has been found that the ink composition has a speed, and at the same time, has characteristics such as compatibility stability and printability of a vehicle comprising the A component and the B component.

The present invention relates to a mixture of the component A and the component B, wherein the weight ratio of both components is 100% by volume of the mixture.
The present invention provides an ink composition characterized in that, when normal hexane is added to the ink composition, the ratio of white turbidity starts when the amount of normal hexane is in the range of 50 to 600% by volume.
In the present invention, the A component is 40 to 90 parts by weight and the B component is 2 to 2 parts by weight in 100 parts by weight of the ink composition.
Provided is an ink composition, which is 5 parts by weight and wherein the component A and the component B are compatible with each other.

[0010]

Next, the present invention will be described in more detail with reference to preferred embodiments. The (meth) acrylic oligomer which is the component B mainly characterizing the present invention includes epoxy (meth) acrylate, epoxidized oil (meth) acrylate, polyester (meth) acrylate, polyether (meth) acrylate, and urethane (meth). Examples include 2- to 6-functional (meth) acrylic oligomers such as acrylates and mixtures thereof. These compounds were obtained from Toagosei Co., Ltd. under the trade name of Aronix M-6000.
Series, 7000 series, 8000 series, 90
Series 0, Aronix M-1100, Aronix M-1200, Aronix-1600, available from Shin-Nakamura Chemical Co., Ltd. under the trade name of NK Oligo or the like, and can be used in the present invention.

The (meth) acrylic monomer as the component B includes polyfunctional monomers such as trimethylolpropane tri (meth) acrylate, dipentaerythritol hexa (meth) acrylate, and pentaerythritol tri (meth) acrylate. 2-ethylhexyl (meth) acrylate, 2-hydroxyethyl (meth)
Examples include monofunctional monomers such as acrylates and mixtures thereof. These compounds are available from the market under the trade names of Aronix M-309 and Aronix M-400 from Toagosei Co., Ltd. and can be used in the present invention.

The amount of the component B contained in the ink composition is as follows:
After mixing both components, it is preferable that normal hexane is dropped into this mixture as a reagent for determining compatibility of both components, and the amount of normal hexane added when the mixture starts to become cloudy is measured and determined. The onset of cloudiness of the mixture due to the addition of normal hexane is not only determined by the amounts of the component A and the component B, but also varies depending on the type of the two components and the combination of the two components. Generally, the amount of normal hexane is in the range of 50 to 600% by volume, preferably 80% by volume, based on 100% by volume of the mixture of the components A and B.
Mixtures where turbidity began in the range of ４００400% by volume were optimal in compatibility. When the amount of normal hexane exceeds 600% by volume, the compatibility of the two components is good, but the resulting ink is poor in photopolymerization drying and infiltration drying. On the other hand, in a mixture in which the amount of normal hexane is less than 50% by volume, white turbidity starts. If so, there is a problem that the compatibility of both components is poor and the physical properties of the obtained ink are reduced.

When the mixing ratio of the two components is represented by a weight ratio, the A component is 40 parts by weight in 100 parts by weight of the ink composition.
It is used in a proportion of up to 90 parts by weight, preferably 50 to 80 parts by weight. Component B is used in an amount of 2 to 25 parts by weight, preferably 5 to 20 parts by weight, based on 100 parts by weight of the ink composition. If the amount of the component B exceeds 25 parts by weight, there is a problem that compatibility with the component A is deteriorated. If the amount is less than 2 parts by weight, there is a problem that photopolymerization drying is deteriorated. A mixing ratio of the component A and the component B with the normal hexane,
The above weight ratios do not always match, and depending on the type of both components and the combination of both components, the mixture may become cloudy due to the addition of normal hexane even within the range of the weight ratio, and the range of the weight ratio Even outside, the addition of normal hexane may not cause cloudiness. Therefore, when determining the mixing ratio between the component A and the component B, priority should be given to determining the mixing ratio by adding normal hexane.

The component A of the present invention is a vehicle comprising an oxidized polymer film-forming material and an ink solvent, and is used for the purpose of imparting ink fluidity, adhesiveness, interface suitability and the like.
Those that are compatible with the aforementioned component B are preferred. Further, those that do not cause curing inhibition by ultraviolet rays are preferable, for example,
Modified phenolic resins are liable to cause curing inhibition and are desirably used as accessory components. Examples of the material for forming the oxidized polymerized film of the component A include vegetable oils such as tung oil, linseed oil, safflower oil, soybean oil, castor oil, dehydrated castor oil and the like, and mixtures thereof; For example, a synthetic resin such as a rosin maleic acid resin, an alkyl-modified resin, a rosin ester resin, an alkyd resin, a rosin-modified phenol resin, a petroleum resin, or a mixture thereof can be used. These oxidized polymer film forming materials are dissolved in an ink solvent to prepare a vehicle as the component A.
When the total amount of the oxidized polymer film-forming material and the B component in the A component is 100 parts by weight, the B component is 3 to 50 parts by weight, and preferably 4 to 40 parts by weight.

The ink solvent is preferably a petroleum solvent. Examples of the petroleum solvent include petroleum solvents having an initial boiling point of 200 ° C. or higher. These petroleum solvents are available from Nippon Oil Co., Ltd. as “Ink Solvent 4,” “Ink Solvent 5,” “Ink Solvent 6,” “Ink Solvent 7,” “AF Solvent 4,” and “AF Solvent. No. 5, "AF Solvent No. 6,""AF Solvent No. 7," and the like, which are commercially available and can be used in the present invention. These ink solvents are preferably used in a proportion of 25 to 60 parts by weight based on 100 parts by weight of the ink composition.

In order to better adjust the compatibility between the component A and the component B, it is preferable to use the above-mentioned petroleum solvent in combination with a highly soluble high-boiling aromatic petroleum solvent. These aromatic petroleum solvents are “Alken L”, “Alken 56N”, “Alken 60NHN”,
"Alken 29T", "Alken 22", "Alken 1"
00P "," Nisseki Hisol SAS296 "," Nisseki Hisol SAS-LH "," condenser oil "and the like can be obtained from the market and used in the present invention.

It is preferable to add an oxidation polymerization catalyst and a photopolymerization initiator to the ink composition of the present invention. The oxidation polymerization catalyst is added for the purpose of accelerating the oxidation polymerization of the component A. Carboxylic acid metal salts can be used. For example, acetic acid, propionic acid, butyric acid, isopentanoic acid, hexanoic acid, 2-ethylbutyric acid, naphthenic acid, octylic acid, nonanoic acid, decanoic acid, 2-ethylhexanoic acid, isooctanoic acid, isononanoic acid, lauric acid, palmitic acid, Cobalt, manganese, lead, zinc, calcium of organic carboxylic acids such as stearic acid, oleic acid, linoleic acid, neodecanoic acid, versatic acid, secanoic acid, tall oil fatty acid, linseed oil fatty acid, soybean oil fatty acid and dimethyloctanoic acid , Zirconium salts and the like or mixtures thereof. The catalyst is used in an amount of 0.01 to 0.3 part by weight, preferably 0.03 to 0.15 part by weight, based on 100 parts by weight of the ink composition.

The photopolymerization initiator for polymerizing and curing the B component is added for the purpose of absorbing ultraviolet rays and initiating the polymerization reaction of the B component.
Photocleavable and / or hydrogen-based compounds that easily generate radicals and are photocleavable, in which the photopolymerization initiator is cleaved to form two radicals, and hydrogen abstraction, in which hydrogen is extracted from other molecules to generate radicals. A drawing die or a mixture thereof can be used. Examples of these compounds include acetophenone, 2,2-diethoxyacetophenone, p-dimethylaminoacetophenone, benzophenone, 2-chlorobenzophenone, p, p′-bisdiethylaminobenzophenone, benzyl, benzoin ethyl ether, and benzoin n-propyl. ether,
Benzoin isopropyl ether, benzoin isobutyl ether, benzoin n-butyl ether, benzoin dimethyl ketal, thioxanthone, 2-chlorothioxanthone, 2-methylthioxanthone, p-isopropyl-α-hydroxyisobutylphenone, α-hydroxyisobutylphenone, 2,2-dimethoxy -2-phenylacetophenone 1-hydroxycyclohexyl phenyl ketone, dibenzosuberone, 2-methyl-1 [4
-(Methylthio) phenyl] -2-morpholinopropan-1-one and the like or a mixture thereof. The catalyst is used in an amount of 0.5% in 100 parts by weight of the ink composition.
It is used in a proportion of 10 to 10 parts by weight, preferably 1 to 5 parts by weight.

In the present invention, a pigment may or may not be added to the ink composition of the present invention. When a pigment is not added, it can be used as an overcoating agent such as OP varnish. By adding a pigment, it can be used as a printing ink. As the pigment used in the present invention, for example,
Inorganic pigments such as titanium oxide, calcium carbonate, barium sulfate, alumina white, zinc white, navy blue, red iron oxide, carbon black, aluminum powder, brass powder, etc., and β-oxynaphthoethoic acid, arilide, acetoacetate monolide monoazo Insoluble azo pigments such as acetylacetate arylide disazo, pyrazolone, etc., copper phthalocyanine blue, sulfonated copper phthalocyanine blue, metal-free phthalocyanine pigments, quinacridone, diosazine, pyranthrone, anthantrone, indanthrone, anthrapyrimidine, flavantron And organic pigments such as polycyclic and heterocyclic pigments such as thioindigo, anthraquinone, perinone, perylene, etc., isoindolinone, metal acetate, quinophthalone, and the like.

In addition to the ink composition of the present invention, additives such as a gelling agent for imparting gel elasticity, a friction-resistant agent, and an anti-skinning agent may be added within a range not to impair the object of the present invention. Often,
Examples of these additives include a chelating agent such as ALCH-50 manufactured by Kawaken Fine Chemical Co., Ltd. as a gelling agent, a natural wax such as paraffin wax and carnaval wax, a polyethylene wax, and a polytetrafluoroethylene as a friction-resistant agent. Synthetic waxes such as fluoroethylene wax and anti-skinning agents include phenols such as cresol, guaiacol, o-isopropylphenol and t-butylhydroxytoluene, and oximes such as methylethylketoxime and cyclohexanone oxime. The ink composition of the present invention can be obtained by kneading and homogenizing the above components according to a conventional method.

[0021]

Next, the present invention will be described more specifically with reference to examples and comparative examples. In the description, “parts” is based on weight. The ink composition of the present invention is prepared by adding an oxidative polymerization type film forming material to an ink solvent, heating and stirring under a nitrogen stream atmosphere, and dissolving at 180 to 200 ° C. for 1 hour.
℃ to the A component, B component is added therein,
It was prepared by dissolving and stirring for 30 minutes. If necessary, a pigment, an oxidation polymerization catalyst, a photopolymerization initiator, an additive, and the like were uniformly kneaded with the above components to prepare an ink composition.

Example 1 The following components were mixed and dispersed well by a mixing stirrer according to the above-mentioned preparation method to prepare an ink composition of the present invention. Rosin ester resin (Pencel PL, manufactured by Arakawa Chemical Co., Ltd.) 17.6 parts Petroleum resin (Nippon Petrochemical Co., Ltd., Nisseki Neopolymer 120) 17.6 parts No. 5, Solvent 18.0 parts Alkene 56N 18. 0 parts Linseed oil 3.5 parts Polyester acrylate (Toagosei Co., Ltd., Aronix M-8060) 3.5 parts Manganese octylate (Nippon Kagaku Sangyo Co., Ltd., trade name: "Manganese dryer 6.5%") 0.6 part cobalt octylate (manufactured by Nippon Chemical Industry Co., Ltd., trade name: "cobalt dryer 8%") 0.2 part 2-methyl-1 [4- (methylthio) phenyl] -2-morpholinopropane -1 on (Irgacure 907, Ciba Geigy) 3.0 parts Phthalocyanine blue 18.0 parts

Example 2 The following components were well mixed and dispersed by a mixing stirrer according to the above-mentioned preparation method, and an ink composition of the present invention was prepared. Rosin ester resin (Pencel PL, Arakawa Chemical Co., Ltd.) 28.5 parts Petroleum resin (Nippon Petrochemical Co., Ltd., Nisseki Neopolymer 120) 9.5 parts Alkene 56N 28.5 parts Soybean oil 19.0 Part Dipentaerythritol hexaacrylate 9.5 parts Manganese octylate (manufactured by Nippon Chemical Industry Co., Ltd., trade name: “manganese dryer 6.5%”) 0.7 parts Cobalt octylate (manufactured by Nippon Chemical Industry Co., Ltd.) Product name: "Cobalt dryer 8%") 0.3 parts 2-methyl-1 [4- (methylthio) phenyl] -2-morpholinopropane-1one (Irgacure 907, manufactured by Ciba Geigy) 4.0 parts

Example 3 The following components were mixed and dispersed well by a mixing stirrer according to the above-mentioned preparation method to prepare an ink composition of the present invention. Rosin ester resin (Pencel PL, Arakawa Chemical Co., Ltd.) 28.5 parts Alkyd resin (Arakawa Chemical Co., Ltd., Arachid 5001) 9.5 parts Alkene 56N 28.5 parts Linseed oil 19.0 parts Polyester acrylate (Toa) Synthetic Co., Ltd., Aronix M-8060) 9.5 parts Manganese octylate (manufactured by Nippon Chemical Industry Co., Ltd., trade name: "Manganese dryer 6.5%") 0.7 parts Cobalt octylate (Nippon Chemical Industry) 0.3 parts 2-methyl-1 [4- (methylthio) phenyl] -2-morpholinopropane-1one (Irgacure 907, manufactured by Ciba Geigy) 4.0 parts

Example 4 The following components were mixed and dispersed well by a mixing stirrer according to the above-mentioned preparation method to prepare an ink composition of the present invention. Rosin ester resin (Haristar K, manufactured by Harima Chemicals, Inc.) 23.0 parts Petroleum resin (Nisseki Neopolymer 120, manufactured by Nippon Petrochemical Co., Ltd.) 8.0 parts Alkene 56N 23.0 parts Linseed oil 16.2 parts Trimethylolpropane triacrylate 8.0 parts Manganese octylate (manufactured by Nippon Chemical Industry Co., Ltd., trade name: “manganese dryer 6.5%”) 0.6 parts Cobalt octylate (manufactured by Nippon Chemical Industry Co., Ltd.) 0.2 parts 2-methyl-1 [4- (methylthio) phenyl] -2-morpholinopropane-1one (Ciba Geigy, Irgacure 907) 3.0 parts Phthalocyanine blue 18.0 copies

Example 5 The following components were mixed and dispersed well by a mixing stirrer according to the above-mentioned preparation method to prepare an ink composition of the present invention. Rosin ester resin (Pencel PL, Arakawa Chemical Co., Ltd.) 16.0 parts Petroleum resin (Nippon Petrochemical Co., Ltd., Nisseki Neopolymer 120) 8.0 parts No. 5, Solvent 11.0 parts Alkene 56N 16. 0 parts Linseed oil 7.7 parts Polyester acrylate 19.5 parts Manganese octylate (manufactured by Nippon Chemical Industry Co., Ltd., trade name: “Manganese dryer 6.5%”) 0.6 parts Cobalt octylate (Nippon Chemical Industry ( 0.2 parts 2-methyl-1 [4- (methylthio) phenyl] -2-morpholinopropane-1one (Irgacure 907, manufactured by Ciba Geigy) 0.0 parts Phthalocyanine blue 18.0 parts

Example 6 The following components were mixed and dispersed well by a mixing stirrer according to the above-mentioned preparation method to prepare an ink composition of the present invention. Rosin ester resin (Harima K), 15.0 parts Petroleum resin (Nippon Petrochemical Co., Ltd., Nisseki Neopolymer 120) 8.0 parts Rosin-modified phenol resin (Arakawa Chemical Co., Ltd.) 8.0 parts 5 solvent 7.0 parts Alkene 56N 15.0 parts Linseed oil 16.2 parts Dipentaerythritol hexaacrylate 8.0 parts Manganese octylate (manufactured by Nippon Chemical Industry Co., Ltd.) Name: "Manganese dryer 6.5%") 0.6 parts Cobalt octylate (manufactured by Nippon Chemical Industry Co., Ltd., trade name: "Cobalt dryer 8%") 0.2 parts 2-methyl-1 [4- ( Methylthio) phenyl] -2-morpholinopropane-1one (Irgacure 907, Ciba-Geigy) 4.0 parts Phthalocyanine blue 18.0 parts

Comparative Example 1 The following components were mixed and dispersed well by a mixing stirrer according to the above-mentioned preparation method to prepare an ink composition. Rosin ester resin (Pencel PL, Arakawa Chemical Co., Ltd.) 28.0 parts AF Solvent 5 23.0 parts Linseed oil 19.2 parts Trimethylolpropane triacrylate 8.0 parts Manganese octylate (Nippon Chemical Industry Co., Ltd.) ), Product name: “Manganese dryer 6.5%”) 0.6 parts Cobalt octylate (manufactured by Nippon Chemical Industry Co., Ltd., product name: “Cobalt dryer 8%”) 0.2 parts 2-methyl-1 [4- (Methylthio) phenyl] -2-morpholinopropane-1one (Irgacure 907, Ciba-Geigy) 3.0 parts Phthalocyanine blue 18.0 parts

Comparative Example 2 The following components were mixed and dispersed well by a mixing stirrer according to the above-mentioned preparation method to prepare an ink composition. Rosin ester resin (Harimar K, manufactured by Harima Chemicals, Inc.) 28.0 parts No. 5 solvent 12.0 parts AF solvent 5 12.0 parts Linseed oil 19.0 parts Polyester acrylate 24.0 parts Manganese octylate ( Nippon Chemical Industry Co., Ltd., trade name: "manganese dryer 6.5%") 0.7 parts Cobalt octylate (Nippon Chemical Industry Co., Ltd., trade name: "cobalt dryer 8%") 0.3 parts 4.0 parts of 2-methyl-1 [4- (methylthio) phenyl] -2-morpholinopropane-1one (Irgacure 907, manufactured by Ciba Geigy)

Comparative Example 3 The following components were mixed and dispersed well by a mixing stirrer according to the above-mentioned preparation method to prepare an ink composition. Rosin ester resin (Pencel PL, Arakawa Chemical Co., Ltd.) 19.0 parts Petroleum resin (Nippon Petrochemical Co., Ltd., Nisseki Neopolymer 120) 19.0 parts No. 5, Solvent 19.5 parts Alkene 56N 19. 5 parts Linseed oil 4.0 parts Manganese octylate (manufactured by Nippon Chemical Industry Co., Ltd., trade name: "manganese dryer 6.5%") 0.7 parts Cobalt octylate (manufactured by Nippon Chemical Industry Co., Ltd., trade name) : "Cobalt dryer 8%") 0.3 parts Phthalocyanine blue 18.0 parts Each of the ink compositions obtained above is printed on coated paper at a printing speed of 8,000 sheets / hour by a Lithrone 26 type printing machine (manufactured by Komori Corporation). 120W / cm metal halide UV
Irradiated with a lamp, offset printing was performed without spraying powder as an anti-setoff agent. The printability and dryness of each printed matter were evaluated by the following measurement methods. Further, the compatibility between the component A and the component B was evaluated by the following measuring method by dropping normal hexane into these mixtures.

(Compatibility) Normal hexane was dropped into each ink composition, the dropping amount of normal hexane at which white turbidity started was measured, and the compatibility state between the A component and the B component was determined according to the following criteria. . Table 1 shows the evaluation results. Evaluation points ：: A component and B component are easily mixed and have good compatibility. When the dropping amount of normal hexane is in the range of 50 to 600% by volume, the mixture becomes cloudy. X: The A component and the B component are hardly mixed, and the compatibility is poor. When the dropping amount of normal hexane is less than 50%, the mixture becomes cloudy.

(Dryability) The dryness of the printed matter immediately after printing was measured by a touch-dry state and a Chaoyangkai drying tester, and was judged according to the following criteria. Table 1 shows the evaluation results. Evaluation points ：: Drying of the printed surface layer portion and the inside of the printed surface layer are good, and there is no ink set-off. X: Insufficient drying on the printed surface layer and inside the printed surface layer, with ink set-off.

(Printability) A printed matter printed with a printing ink obtained by kneading a pigment with the above ink composition was visually evaluated based on the following criteria. Table 1 shows the evaluation results. Evaluation point ：: Reproduced printing condition comparable to that of the oxidative polymerization type ink printed matter, and there was no whitening on the printed surface. ×: Reproducibility of printing condition is poor as compared with oxidation polymerization type ink printed matter, and printing surface is whitened.

[0034]

[Table 1]

[0035]

According to the ink composition of the present invention, by using the component A in a compatible state with the component B, photopolymerization curing, oxidative polymerization curing, and penetration by irradiating light energy such as ultraviolet rays and electron beams. It is an ink composition that can be designed to have high-performance drying characteristics in lithographic printing, letterpress printing, and the like by complex drying and curing such as drying and curing. Photopolymerized and cured inks by ultraviolet rays or electron beams are higher in running costs such as raw materials and light energy than oxidized and polymerized inks, but the ink composition of the present invention is inexpensive because the main component is A component. . In addition, compared to oxidized polymerization inks, it has a high-performance drying property, so printing can be performed without spraying powder as a set-off preventing agent. It is possible to pursue usefulness.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4J039 AB04 AB08 AD09 AD14 AD18 AE02 AE06 BB01 BC01 BC19 BE01 BE12 BE27 BE33 EA10 EA12

Claims (6)

[Claims] 1. A mixture of a vehicle (component A) comprising a material for forming an oxidized polymerized film and an ink solvent and a (meth) acrylic oligomer and / or a (meth) acrylic monomer (component B), the weight of both being An ink composition wherein the ratio is such that when normal hexane is added to 100% by volume of the mixture and the amount of normal hexane is 50 to 600% by volume, cloudiness starts. 2. In 100 parts by weight of the ink composition,
An ink composition, wherein the component A is 40 to 90 parts by weight, the component B is 2 to 25 parts by weight, and the component A and the component B are compatible. 3. The ink composition according to claim 1, wherein a pigment is kneaded. 4. The ink composition according to claim 1, further comprising an oxidation polymerization catalyst and a photopolymerization initiator. 5. The organic solvent in the vehicle is a petroleum-based solvent, and 25 to 60 parts by weight in 100 parts by weight of the ink composition.
The ink composition according to any one of claims 1 to 4, which is a part by weight. 6. When the total amount of the oxidized polymer film forming material and the B component in the A component is 100 parts by weight, the B component is 3 to 5 parts by weight.
The ink composition according to any one of claims 1 to 5, which is 0 parts by weight.