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Process for producing ink composition for offset printing, and ink composition for offset printing produced by said production process

An ink composition and offset printing technology, applied in the direction of ink, dyeing polymer organic compound treatment, nanotechnology for materials and surface science, etc., can solve the problem of increasing manufacturing processes, difficulty in determining the best crushing conditions, and increasing manufacturing time or energy costs etc.

Inactive Publication Date: 2008-03-12
SAKATA INX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, in order to obtain such a composition, additional equipment for dry pulverization (dry attritor, ball mill, vibration mill, etc.) is required, and there is a problem that it is difficult to determine the optimum pulverization conditions.
In addition, due to the increase in manufacturing steps, it is inevitable to increase manufacturing time or energy costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] 224 parts with a pH of 7.0, a primary particle size of 27 nm, and a bulk density of 0.42 g / cm in a table-top squeezer (manufactured by Inoue Machinery) at 25°C 3 The pigment was mixed with neutral granular carbon black (BLACKPEARLS430, manufactured by Cabot) and 224 parts of wetting agent (tap water) for 30 minutes to wet the carbon black, and then 56 parts of carbon black having a basic skeleton composed of isophthalic acid were added. Liquid soybean oil modified alkyd resin 1 (acid value 5KOHmg / g), after that, add 200 parts of rosin modified phenolic resin (weight average molecular weight is 10000) / soybean oil / AF solvent No. 6 (trade name, mineral Oil component, solvent for printing ink, manufactured by Nippon Petrochemical Co., Ltd.) in a mass ratio of 40 / 25 / 35 binder resin oil-based varnish 1, and the resulting mixture was squeezed at 50° C. for 60 minutes (by the way , where the liquid soybean oil-modified alkyd resin 1 was added to the binder resin oil-based varni...

Embodiment 2

[0061] Instead of adding the liquid soybean oil-modified alkyd resin 1 and the binder resin oil-based varnish 1 having a basic skeleton composed of isophthalic acid, 256 parts of rosin-modified phenolic resin (weight average molecular weight 10000) / Soybean oil-modified alkyd resin (acid value 5KOHmg / g) / soybean oil / AF solvent No. 6 mass ratio of 31 / 22 / 20 / 27 oily base for printing ink having a basic skeleton composed of isophthalic acid Except for the varnish 2, the original ink 2 for offset printing and the ink composition 2 for offset printing were obtained using the same materials and the same production conditions as in Example 1.

Embodiment 3

[0063] The neutral carbon black used is changed from the neutral granular carbon black for pigments in Example 1 to a pH of 7.5, a primary particle size of 30 nm, and a bulk density of 0.46 g / cm 3 Neutral granular carbon black for rubber (N326, manufactured by Degussa), except that, using the same materials and the same production conditions as in Example 1, the raw ink 3 for offset printing and the ink composition 3 for offset printing were obtained.

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Abstract

This invention provides a process for producing an ink composition for offset printing, which can significantly improve the productivity of ink while utilizing neutral carbon black and can produce ink capable of providing printed matter, by sheet-fed printing, having higher print quality than printed matter produced by ink using acidic carbon black, and an ink composition for offset printing produced by the production process. The production process is characterized by comprising the steps of wetting 300 parts by mass of neutral carbon black with 100 to 900 parts by mass of a wetting agent containing at least water, flushing the wetted neutral carbon black with varnish, for oil-based printing ink, containing an alkyd resin having an acid value of not more than 30 KOH mg / g, and then removing the wetting agent.

Description

technical field [0001] The present invention relates to a method for producing an ink composition for offset printing, and an ink composition for offset printing obtained by the production method. Background technique [0002] In order to manufacture the black ink composition for offset printing, it is necessary to fully disperse the carbon black in the oily varnish for printing ink, so as to improve the fluidity or color development effect of the carbon black. [0003] Generally, the carbon black used in the black ink composition for offset printing is an acidic powdery carbon black in which the surface of the carbon black is oxidized with ozone or a chemical agent. [0004] The acidic powdery carbon black is dispersed in an extremely simple manner as follows: Grinding the acidic powdery carbon black in a dry state in an oil-based varnish for printing inks. Although this is so simple, the resulting black ink combination for offset printing The carbon black in the product h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/02C09C1/48C09C3/10C09D11/033C09D11/037C09D11/10C09D11/103C09D11/104C09D11/106C09D11/107
CPCB82Y30/00C09C1/565C09D11/105C09C1/56C01P2004/64C09D11/037C01P2006/10
Inventor 荒木隆史舟桥广晃潟浦雄一
Owner SAKATA INX