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Synthesis method of modified bisphenol A epoxy acrylate

A technology of epoxy acrylate and synthesis method, used in epoxy resin coatings, coatings and other directions, can solve the problems of high viscosity, insufficient flexibility, high brittleness, and achieve the expansion of application fields, improved flexibility, and excellent yellowing resistance. Effect

Inactive Publication Date: 2013-12-18
JIANGMEN HENGZHIGUANG ENVIRONMENTAL PROTECTION NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Among many epoxy acrylates, bisphenol A type epoxy acrylate is the fastest curing speed, the cured film has high hardness, high gloss, excellent chemical resistance, good heat resistance and electrical properties, and its The source is convenient and the price is cheap, and it is widely used in other light and heat curing coating systems. However, the aromatic ring in the molecular structure of bisphenol A epoxy acrylate makes the molecule have a rigid structure, insufficient flexibility, high brittleness, and high viscosity, which affects the coating. Construction viscosity and rheology, light aging resistance and flower degeneration resistance. Therefore, researchers have made some efforts and attempts to address the above problems
Common methods such as introducing fatty acid modified epoxy acrylate to improve flexibility; or using epoxy soybean oil to synthesize epoxy soybean oil acrylate to reduce viscosity and increase flexibility; and first use dibasic anhydrides (such as phthalic anhydride ) react with hydroxyethyl acrylate and then react with epoxy resin to prepare conventional methods such as modified epoxy acrylate, but they cannot solve the above problems well

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Example 1 Preparation of bisphenol A epoxy acrylate

[0014] First, 1000g of bisphenol A epoxy resin (epoxy equivalent 185-195g / eq, purchased from Jiangsu Sanmu Chemical Co., Ltd.), 240g of acrylic acid, 2.7g of catalyst triethylamine, and 3g of polymerization inhibitor p-hydroxyanisole were all added to the reaction Inside the cauldron. After all the raw materials are put in, start stirring, adjust the stirring speed at 80-100 rpm, start to slowly raise the temperature, and raise the temperature to 115°C in about 1 hour. Then keep it at 115-120°C for 5 hours, and check the acid value after the end of the heat preservation. When the acid value is less than 5mg KOH / g, you can turn on the cooling water raft to lower the temperature and discharge it at 80°C. The acid value in the present invention refers to the mg value of potassium hydroxide required to neutralize 1g of the sample.

Embodiment 2

[0015] The preparation of embodiment two modified bisphenol A epoxy acrylate

[0016] Add 1000g of bisphenol A epoxy resin (epoxy equivalent 185-195g / eq) and 100g of ethylene glycol into the reaction vessel, and add 2.1kg of catalyst tetrabutylammonium bromide, 1.2kg of inhibitor p-hydroxyanisole kg, start stirring and heat up to the reaction temperature of 80°C. After 1 hour of reaction, add 240g of acrylic acid, and then keep it at 115°C for 5 hours. .

Embodiment 3

[0017] Embodiment three preparation of modified bisphenol A epoxy acrylate

[0018] Add 1000g of bisphenol A epoxy resin (epoxy equivalent 185-195g / eq) and 400g of ethylene glycol into the reaction vessel, add 2.4kg of catalyst triethylamine and 1.2kg of polymerization inhibitor p-hydroxyanisole, and start Stir and heat up to the reaction temperature of 90°C. After reacting for 1 hour, add 230g of acrylic acid, and then keep the temperature at 100°C for 5 hours, when the acid value is less than 5.

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PUM

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Abstract

The invention discloses a synthesis method of modified bisphenol A epoxy acrylate. The method comprises the following steps: mixing and heating bisphenol A epoxy resin, ethylene glycol, a catalyst and a polymerization inhibitor, adding acrylic acid after reacting at 80-90 DEG C for 1-2 hours, and insulating a product at 100-120 DEG C for 3-5 hours, thus obtaining modified bisphenol A epoxy acrylate, wherein the dosage of ethylene glycol is 0.1-0.4 times the weight of bisphenol A epoxy resin, and the dosage of acrylic acid is 10-30% of the weight of bisphenol A epoxy resin. Modified bisphenol A epoxy acrylate synthesized by the method obviously improves the flexibility and yellowing resistance of products, reduces the viscosity of substances, expands the application fields of the products and can be applied to photo-curing ink, plastic coatings and the like.

Description

technical field [0001] The invention belongs to the field of resin synthesis, in particular to a method for synthesizing modified bisphenol A epoxy acrylate. Background technique [0002] Among many epoxy acrylates, bisphenol A type epoxy acrylate is the fastest curing speed, the cured film has high hardness, high gloss, excellent chemical resistance, good heat resistance and electrical properties, and its The source is convenient and the price is cheap, and it is widely used in other light and heat curing coating systems. However, the aromatic ring in the molecular structure of bisphenol A epoxy acrylate makes the molecule have a rigid structure, insufficient flexibility, high brittleness, and high viscosity, which affects the coating. Construction viscosity and rheology, light aging resistance and flower degeneration resistance. Therefore, researchers have made some efforts and attempts to address the above problems. Common methods such as introducing fatty acid modified ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/17C08G59/14C09D163/10
Inventor 朱仁祖
Owner JIANGMEN HENGZHIGUANG ENVIRONMENTAL PROTECTION NEW MATERIAL CO LTD