Preparation method of rosin modified phenolic resin flake for offset print

A technology of rosin modification and phenolic resin, which is applied in the field of offset printing ink materials, can solve the problems of high n-hexane tolerance, high viscosity, and low viscosity, and achieve the effects of large molecular weight, uniform distribution, and high tolerance

Inactive Publication Date: 2016-11-02
桂林市产品质量检验所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Rosin resins currently available as binders for offset printing inks include bisphenol A-type phenolic resins, p-tert-butylphenol-modified phenolic resins, p-tert-octylphenol-type phenolic resins, nonylphenol-modified phenolic resins and dodecyl phenolic resins. Phenolic resin and other high-phenol modified rosin phenolic resin products, these products are mostly synthesized from a single type of rosin and a single type of alkylphenol, and it is difficult to meet the requirements of high molecular weight, high viscosity, and high n-hexane tolerance at the same time Because ordinary masson pine rosin does not have dibasic acid, the molecular weight of the synthetic resin is not high enough; a single species of alkylphenol makes the synthetic resin either high in viscosity and low in n-hexane tolerance, or high in n-hexane tolerance and low in n-hexane tolerance. low viscosity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] (1) Synthesis of phenolic pulp: put in alkylphenol according to the molar ratio of p-octylphenol and nonylphenol as 1:0.70, then put in paraformaldehyde according to the molar ratio of phenol and aldehyde as 1:0.85, and dissolve it at 50± Put in toluenesulfonic acid at 2°C according to the molar ratio of phenol and toluenesulfonic acid as 1:0.001, keep warm at 95±2°C for 3 hours to carry out acid-catalyzed condensation; Add paraformaldehyde for the second time, add calcium hydroxide according to the molar ratio of phenol and calcium hydroxide at 1:0.009 at 50±2°C, then raise the temperature to 95±2°C, and keep it warm for 2 hours for alkali-catalyzed condensation;

[0015] (1) Resin synthesis reaction: Add masson pine rosin and Hainan rosin at a molar ratio of 1:0.5, heat to 200-210°C to melt, add catalyst zinc oxide at a molar ratio of rosin to zinc oxide of 1:0.03, cool, and maintain 195 Add the phenolic slurry synthesized in step (1) dropwise to rosin in 4.5 hours±15...

Embodiment 2

[0017] (1) Synthesis of phenolic pulp: put in alkylphenol according to the molar ratio of p-octylphenol and nonylphenol as 1:0.74, then put in paraformaldehyde according to the molar ratio of phenol and aldehyde as 1:0.89, dissolve, and dissolve at 50± Add toluenesulfonic acid at 2°C, keep warm at 95±2°C for 3 hours for acid-catalyzed condensation; then lower the temperature, add paraformaldehyde for the second time at 65-70°C according to the molar ratio of phenol and aldehyde of 1:1.10, at 50±2°C Add calcium hydroxide, then raise the temperature to 95±2°C, and keep it warm for 2 hours to carry out alkali-catalyzed condensation.

[0018] (1) Resin synthesis reaction: Add masson pine rosin and Hainan rosin at a molar ratio of 1:1, heat to 200-210°C to melt, put in catalyst zinc oxide, cool, maintain 195±2°C, and take 4.5 hours±15 minutes to melt Step (1) The synthesized phenolic slurry is added dropwise to the rosin; after the dropwise addition, the temperature is raised to 20...

Embodiment 3

[0021] (1) Synthesis of phenolic pulp: put in alkylphenol according to the molar ratio of p-octylphenol and nonylphenol as 1:0.72, and then put in paraformaldehyde according to the molar ratio of phenol and aldehyde as 1:0.87, dissolve it at 50± Add toluenesulfonic acid at 2°C, keep warm at 95±2°C for 3 hours for acid-catalyzed condensation; then lower the temperature, add paraformaldehyde for the second time at 65-70°C according to the molar ratio of phenol and aldehyde of 1:1.28, and put in at 50±°C Calcium hydroxide, then heat up to 95±2°C, keep warm for 2 hours to carry out alkali-catalyzed condensation;

[0022] (1) Resin synthesis reaction: add masson pine rosin, Vietnamese rosin, and Hainan rosin at a molar ratio of 1:0.32:0.43, heat to 200-210°C to melt, put in catalyst zinc oxide, cool, maintain 195±2°C, use 4.5 Add the phenolic slurry synthesized in step (1) into the rosin dropwise within 1 hour ± 15 minutes; after the dropwise addition, the temperature is raised to ...

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PUM

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Abstract

The invention discloses a preparation method of rosin modified phenolic resin flake for offset print. The preparation method comprises the following steps: firstly synthesizing phenolic aldehyde slurry, then carrying out resin synthesis reaction of rosin, and finally processing the product into flakes by a flaking mill. In comparison with traditional rosin modified phenolic resin produced by single rosin of Pinus massoniana Lamb or single alkylphenol, the rosin modified phenolic resin flake provided by the invention has the following advantages: Hainan rosin, Vietnamese rosin and Indonesian rosin of pine trees from South Asia are adopted, and those kinds of rosin contain dibasic acids and there is no need to introduce other organic dibasic acids (maleic acid and fumaric acid, etc.); and 4-tert-octylphenol and nonylphenol are adopted as alkylphenol. Then, the prepared rosin modified phenolic resin has higher viscosity and n-hexane carrying capacity and larger molecular weight, is uniformly distributed, and is suitable for offset printing ink.

Description

technical field [0001] The invention relates to the technical field of offset printing ink materials, in particular to a method for preparing a rosin-modified phenolic resin sheet for offset printing. Background technique [0002] Rosin-modified phenolic resin is the best resin currently used in offset printing oil. It is a polymer product produced by chemical reaction of alkylphenol, formaldehyde, polyol and rosin. Due to its unique honeycomb structure characteristics, it has good pigment wetting performance, and at the same time, it can react with an appropriate gelling agent to obtain a certain viscoelastic binder, so it is widely used in lithographic offset printing inks. Rosin-modified phenolic resin directly affects the gloss, drying, water resistance, viscosity, rheology, printing performance, etc. of printing inks. At present, the lithographic offset printing inks used in offset printing inks are all produced with rosin-modified phenolic resins and asphalt-modified r...

Claims

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Application Information

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IPC IPC(8): C08G8/34C08G8/04C08G8/12
CPCC08G8/04C08G8/12C08G8/34
Inventor石相莉谭冬明庾国新
Owner桂林市产品质量检验所