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Method for producing modified rosin ester resin composition for lithographic ink varnish and method for producing lithographic ink varnish

A technology of resin composition and lithographic ink, applied in the direction of ink, natural resin chemical modification, application, etc., can solve the problems of difficulty in obtaining sufficient viscoelasticity of lithographic ink, difficult reaction, pollution and flying ink, etc., and achieve the suppression of printing incompatibility , high resin solubility, effective effect of environmental improvement

Active Publication Date: 2007-04-18
DAINIPPON INK & CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the dihydric alcohols with 6 to 60 carbon atoms used here are difficult to stay in the reaction system at the reaction temperature of 220 to 270° C. of common resin acids due to their low boiling point, and there are the following problems: Medium volatility, difficult to react, reaction requires significantly longer time, so it is difficult to achieve high viscosity
Therefore, it is difficult to obtain sufficient viscoelasticity for lithographic inks with varnishes mainly composed of these resins.
In addition, reduce the proportion of dihydric alcohols with 6 to 60 carbon atoms in the reaction system, and replace them with resins synthesized by polyhydric alcohols of more than 3 yuan, and make varnishes as lithographic inks, which are more suitable for the environment. Preferable aromatic compound components of 1% by weight or less have insufficient solubility in printing ink solvents, insufficient ink fluidity and transferability, and reduced gloss of printed matter
In addition, in order to improve these shortcomings, alkyd resins synthesized from vegetable oils such as vegetable oils, linseed oils, tung oils, soybean oils, etc., are added in the varnish preparation stage, and ink flying that pollutes the printing environment occurs. The problem has not been fully resolved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Add 1000 g of rosin (acid value 165KOHmg / g) and 106 g of fumaric acid to the reaction vessel, and heat and stir at 220° C. for 1 hour under nitrogen flow to obtain an acid value of 242 KOHmg / g containing acid-modified rosin and unreacted rosin After adding and mixing 317 g of linseed oil and 162 g of pentaerythritol, 1.5 g of magnesium oxide as a catalyst was added, stirred and mixed, and the temperature in the reaction vessel reached 161°C. Then, the reaction container was heated, and the temperature was raised to 270°C at a temperature increase rate of 30°C / hour for reaction, and then reacted at 270°C so that the acid value became 20KOHmg / g or less to obtain modified rosin ester resin and unreacted flax Modified rosin ester resin composition (R-1) for lithographic ink varnish of the present invention comprising kernel oil and pentaerythritol. About the obtained modified rosin ester resin composition (R-1) for lithographic ink varnishes, the acid value, weight average ...

Embodiment 2

[0051] Add 1000g of rosin (acid value 165KOHmg / g) and 106g of fumaric acid to the reaction vessel, and heat and stir at 200°C for 30 minutes under nitrogen flow to obtain an acid value of 240KOHmg / g containing acid-modified rosin and unreacted rosin After adding and mixing 240 g of linseed oil and 162 g of pentaerythritol, 1.5 g of magnesium oxide as a catalyst was added, stirred and mixed, and the temperature in the reaction vessel reached 155°C. Then, the reaction vessel was heated, and the temperature was raised to 260° C. while reacting at a heating rate of 30° C. / hour, and then reacted at 260° C. to make the acid value below 25 KOHmg / g to obtain modified rosin ester resin and unreacted Modified rosin ester resin composition (R-2) for lithographic ink varnish of the present invention comprising linseed oil and pentaerythritol. The acid value, weight average molecular weight, viscosity, and solvent solubility (AF Solvent No. 7 solubility) of the obtained modified rosin este...

Embodiment 3

[0053] Add 1000g of rosin (acid value 165KOHmg / g) and 106g of fumaric acid to the reaction vessel, and heat and stir at 200°C for 30 minutes under nitrogen flow to obtain an acid value of 240KOHmg / g containing acid-modified rosin and unreacted rosin After adding and mixing 160 g of linseed oil and 162 g of pentaerythritol, 1.5 g of magnesium oxide as a catalyst was added and stirred and mixed, and the temperature in the reaction vessel reached 160°C. , then, heat the reaction vessel, and then react at 260°C with a heating rate of 30°C / hour to 260°C, and then react at 260°C to make the acid value below 30KOHmg / g to obtain modified rosin ester resin and unreacted Linseed oil and pentaerythritol modified rosin ester resin composition (R-3) for lithographic ink varnish of the present invention. The acid value, weight average molecular weight, viscosity, and solvent solubility (AF Solvent No. 7 solubility) of the obtained modified rosin ester resin composition for lithographic ink ...

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PUM

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Abstract

Disclosed is a method for producing a modified rosin ester resin composition for lithographic ink varnish wherein a rosin (A), an acid-modified rosin (B) obtained by modifying the rosin (A) with an alpha,beta-unsaturated dicarboxylic acid and / or an anhydride (b) thereof, an oil-modified rosin (C) obtained by modifying the rosin (A) with a vegetable oil (c) having an iodine number of not less than 140, and a tri- or more valent polyol (D) are reacted with one another.

Description

technical field [0001] The present invention relates to a method for producing a modified rosin ester resin composition for lithographic ink varnishes, and a method for producing lithographic ink varnishes using the modified rosin ester resin composition for lithographic ink varnishes obtained by the production method. Background technique [0002] Rosin-modified phenolic resins are mainly used as raw materials for offset lithographic ink resins and varnishes. However, in order to improve the living environment and working environment, new resins that remove the alkylphenol components and formaldehyde components present in the resin have been developed in recent years. . [0003] As a method for producing resins for offset lithographic inks that does not contain such alkylphenol components and formaldehyde components, for example, there has been proposed a Diels Alder method of resin acids such as rosin and α, β-ethylenically unsaturated carboxylic acids or their anhydrides....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/10C08G63/00C08G63/54C09D11/08
CPCC08G63/54C09D11/08C09D11/105C09F1/04
Inventor 下山昭一本村雅俊
Owner DAINIPPON INK & CHEM INC
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