Method of preparing rosin modified phenolic resins with high viscosity and high dissolvability

A high-solubility, rosin-modified technology, which is used in the preparation of high-viscosity, high-solubility rosin-modified phenolic resins, can solve the problems of ink drying, fixation performance not fully adaptable, difficult determination of polycondensation end point, phenolic pulp easy to swell, etc. Problems, achieve significant environmental protection, reduce material consumption and energy consumption, and achieve the effect of uniform resin molecular weight

Inactive Publication Date: 2007-10-17
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the operation of the two-step process, the phenolic pulp is easy to swell, the unit consumption of phenol is large, the solubility of the product is poor, the end point of polycondensation is not easy to judge, and it is easy to cause excessive polycondensation a

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Put 408g of rosin into a 1000ml four-necked flask with a stirrer and a straight condenser, feed N 2 , heat up and make it melt, and turn on the stirrer. When the temperature rises to 185° C., 24 g of fumaric acid is added, the temperature is continued to rise, and the reaction is carried out under reflux at 200-210° C. for 1 hour. After the heat preservation is completed, lower the temperature. When the temperature drops to 178°C, add 67g of pentaerythritol and 0.8g of magnesium oxide. When the temperature is lowered to 160°C, add 125g of dodecylphenol and 110g of p-tert-octylphenol. After the addition, the temperature drops to At 135°C, 88g of polyoxymethylene was added, and the temperature was controlled at 130°C-140°C for reflux reaction for 3 hours. After the heat preservation is completed, change the straight condenser to a horizontal condenser, continue to heat up to 260°C, keep warm at 260°C-270°C for esterification reaction until the acid value of the reactant i...

Embodiment 2

[0023] 1224g rosin is dropped into the 3000ml stainless steel reactor that has agitator and straight shape condenser, feeds N , heat up and make it melt, open agitator. When the temperature rises to 185° C., 72 g of fumaric acid is added, and the temperature is continued to rise, and the temperature is kept at 200-210° C. for reflux reaction for 1 hour. After the heat preservation is completed, lower the temperature. When the temperature drops to 180°C, add 202g of pentaerythritol and 2.4g of magnesium oxide. When the temperature is lowered to 160°C, add 387g of dodecylphenol and 327g of p-tetraoctylphenol. After the addition, the temperature drops to 137°C, add 260g of polyoxymethylene, control the temperature at 130°C-140°C and keep it under reflux for 3 hours. After the heat preservation is completed, change the straight condenser to a horizontal condenser, continue to heat up to 260°C, and keep warm at 260°C-270°C for esterification reaction until the acid value of the rea...

Embodiment 3

[0025] 36.9Kg rosin is put into a 100l stainless steel reactor with a stirrer and a straight condenser, feed N 2 , heat up and make it melt, and turn on the stirrer. When the temperature rises to 185°C, add 0.4Kg of fumaric acid, continue to heat up, and keep warm at 200-210°C for reflux reaction for 1 hour. After the heat preservation is completed, the temperature is lowered. When the temperature drops to 178°C, add 6.5Kg of pentaerythritol and 0.1Kg of magnesium oxide. When the temperature is lowered to 160°C, add 10.0Kg of dodecylphenol and 8.8Kg of p-tetraoctylphenol. , the temperature was lowered to 137°C, 6.5Kg of polyoxymethylene was added, and the temperature was controlled at 130°C-140°C for reflux reaction for 3 hours. After the heat preservation is completed, change the straight condenser to a horizontal condenser, continue to heat up to 260°C, keep warm at 260°C-270°C for esterification reaction until the acid value of the reactant is less than 25mg KOH / g, and depr...

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PUM

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Abstract

The invention relates to a producing method for a rosin modified phenolic resin. The technology program is: doing an addition reation of trans-butene diacid and rosin, reacting paraform and alkyl phenol-dodecyl phenol and 4-tert-Octylphenol, doing a cyclization reaction of methylol phenol and rosin and its addition compound in the temperature raising process, finially esterifying the pentaerythritol in a high temperature. The proportion is (wt.%): rosin 50-55, dodecyl phenol 12-17, trans-butene diacid 1-4, 4-tert-Octylphenol 10-15, pentaerythritol 8-12, polyformaldehyde 8-13, magnesia 0.08-0.20. The invention adopts the Diels-Alder addition reaction of trans-butene diacid and rosin to enhance the molecule structure of the rosin and increase the viscidity and softening-point of resin. Meanwhile, it reacts with long-chain alkyl phenol and 4-tert-Octylphenol in the existence of rosin and its addition. The craft is simple and the product is highly-purified.

Description

technical field [0001] The invention relates to a preparation method of a rosin-modified phenolic resin, in particular to a preparation method of a high-viscosity and high-solubility rosin-modified phenolic resin used for preparing lithographic ink binders. Background technique [0002] Rosin-modified phenolic resin is mainly used in the manufacture of inks and coatings, and it is combined with vegetable oil, mineral oil solvent and other auxiliary materials to make ink binders. The synthesis process mainly includes two steps: one-step method and two-step method. In the two-step process, the phenolic pulp is easy to swell, the unit consumption of phenol is large, the solubility of the product is poor, the end point of polycondensation is not easy to judge, and it is easy to cause excessive polycondensation and affect the performance of the product. After repeated washing, it is time-consuming and consumes raw materials, and the washing process is cumbersome and the discharg...

Claims

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Application Information

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IPC IPC(8): C08G8/34
Inventor 黄宝铨陈庆华肖荔人刘欣萍钱庆荣许兢
Owner FUJIAN NORMAL UNIV
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