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Preparation method of alkali-resistant bisphenol A type unsaturated polyester resin

A polyester resin and unsaturated technology, applied in the field of preparation of alkali-resistant bisphenol A unsaturated polyester resin, can solve problems such as hydrolysis damage, and achieve the effects of good stability and simple synthesis process

Active Publication Date: 2011-07-06
HUACHANG POLYMER EAST CHINA UNIV OFSCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the two ends of general-purpose bisphenol A unsaturated polyester resins have hydroxyl or carboxyl groups, which are prone to hydrolysis and damage. The chemical corrosion resistance of bisphenol A unsaturated polyester resins at higher temperatures, especially alkali resistance It is often unable to meet the special needs of some occasions, which limits the further expansion of the application of bisphenol A unsaturated polyester resin in the anti-corrosion industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 32g of diethylene glycol, 506g of ethoxylated bisphenol A, and 196g of maleic anhydride into the reactor with a thermometer, agitator, nitrogen inlet pipe and condenser, gradually heat up, and open it when the material melts Stir, then gradually raise the temperature to 170-190°C, the head temperature does not exceed 105°C, and react until the acid value is 40-50mgKOH / g; when cooling to 110-130°C, add 37g E54 epoxy resin and 2.0g triphenylphosphine, Control the reactant at 100-130°C, react until the acid value is 20-35 mgKOH / g, add 0.15 g of hydroquinone, stir for 0.5 hour and mix well. Cool the reaction product to 100°C, add 600g of styrene, stir well at 70-90°C and filter to obtain a light yellow viscous liquid, which is the product alkali-resistant bisphenol A type unsaturated polyester resin.

Embodiment 2

[0025] Add 38g of propylene glycol, 482g of propoxylated bisphenol A, and 232g of maleic acid into the reactor with a thermometer, agitator, nitrogen inlet pipe and condenser, and gradually heat up. When the material melts, start stirring, and then gradually heat up to 170-190°C, the temperature of the distillation head does not exceed 105°C, and react until the acid value is 40-50mgKOH / g; when cooling to 110-130°C, add 37g E54 epoxy resin and 3.0g triphenylphosphine oxide to control the reactants At 100-130°C, react until the acid value is 20-35 mgKOH / g, add 0.20 g of methyl hydroquinone, stir for 0.5 hours and mix well. Cool the reaction product to 100°C, add 550g of chlorostyrene, stir well at 70-90°C and filter to obtain a light yellow viscous liquid.

Embodiment 3

[0027] Add 46g ethylene glycol, 413g propoxylated bisphenol A, 232g fumaric acid in the reactor with thermometer, stirrer, nitrogen inlet pipe and condenser, gradually heat up, start stirring after the material melts, then Gradually raise the temperature to 170-190°C, the temperature of the distillation head does not exceed 105°C, and react until the acid value is 40-50mgKOH / g; when cooling to 110-130°C, add 39g of E51 epoxy resin and 2.5g of triphenylphosphine dichloride, Control the reactant at 100-130°C, react until the acid value is 20-35 mgKOH / g, add 0.30 g of p-tert-butylhydroquinone, stir for 0.5 hour and mix well. Cool the reaction product to 100°C, add 500g of divinylbenzene, stir well at 70-90°C, and filter to obtain a light yellow viscous liquid.

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PUM

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Abstract

The invention relates to a preparation method of alkali-resistant bisphenol A type unsaturated polyester resin, which belongs to the technical field of organic synthesis. The preparation method comprises the following steps of: adding 1-8 percent of dihydric alcohol, 29-40 percent of bisphenol A derivative and 12-20 percent of unsaturated dibasic acid into a reaction kettle, gradually raising the temperature to 170-190 DEG C, keeping the temperature of a fracture head below 105 DEG C and undergoing a reaction until the acid value is between 40 mgKOH / g and 50 mgKOH / g, wherein the total molar ratio of acid to alcohol is (1.09-1.02):1.0; cooling to 110-130 DEG C and adding 2-8 percent of bisphenol A type unsaturated polyester resin; controlling the temperature between 100 DEG C and 130 DEG C, undergoing a reaction until the acid value is between 20 mgKOH / g and 35 mgKOH / g, adding a polymerization inhibitor and stirring uniformly; and finally cooling to 100 DEG C and adding 38-45 percent of crosslinkable monomer. The method has the advantages that: a bisphenol A gene is introduced into the unsaturated polyester resin, and an end is sealed by bisphenol A type epoxy resin, so that the alkali resistance and the temperature resistance of the unsaturated polyester resin are remarkably enhanced; meanwhile, cure shrinkage is lowered and bonding force with a substrate is enhanced; and high product stability and a simple synthesis process are achieved.

Description

technical field [0001] The invention belongs to the technical field of organic synthesis, and relates to a preparation method of an alkali-resistant bisphenol A type unsaturated polyester resin. Background technique [0002] Unsaturated polyester resin has the advantages of excellent mechanical properties, electrical properties and chemical corrosion resistance, easy to obtain raw materials, and simple processing technology. It can be cured and formed at room temperature and normal pressure without releasing any by-products. The production and processing industry of unsaturated polyester resin has developed extremely rapidly, and its products have been widely used in various industries such as construction industry, chemical anti-corrosion, and transportation. [0003] Bisphenol A type unsaturated polyester resin uses bisphenol A derivatives as diols. Bisphenol A has a high molecular weight and a large spatial structure. The introduction of bisphenol A groups into unsaturate...

Claims

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Application Information

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IPC IPC(8): C08G81/00C08G63/91C08G63/676
Inventor 钱建华刘坐镇刘华付建辉
Owner HUACHANG POLYMER EAST CHINA UNIV OFSCI & TECH
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