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Preparation method of special epoxy resin for aqueous ultraviolet solidifying coating

A technology of epoxy resin and curing coating, applied in epoxy resin coatings, coatings, latex paints, etc., can solve the problems of slow reaction speed, affecting reaction conversion rate, and increasing cost.

Active Publication Date: 2007-09-19
CHINA PETROCHEMICAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are obvious defects in the traditional process conditions: ① reaction at low temperature, slow reaction speed, low conversion efficiency of acrylic acid; It will slowly trigger the ring-opening polymerization of the remaining epoxy groups, which seriously affects the storage performance of the product; ③Using nitrogen protection is easy to bring out some volatile raw materials, which affects the reaction conversion rate
④The original process adopts the method of adding acrylic acid dropwise, and the dropping process is not easy to control

Method used

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  • Preparation method of special epoxy resin for aqueous ultraviolet solidifying coating
  • Preparation method of special epoxy resin for aqueous ultraviolet solidifying coating

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Experimental program
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Embodiment 1

[0038] The technique of the present embodiment is: a, according to proportioning bisphenol A type epoxy resin and acrylic acid are raw material by the mol ratio of epoxy group and acrylic acid is 0.95~1.05: 0.95~1.05 feeds intake, bisphenol A type epoxy resin epoxy The equivalent is 186g / eq. Add the catalyst triethylamine to account for 8‰ of the mass ratio of the reaction system and the polymerization inhibitor p-hydroxyanisole 6‰, react at 90°C for 1.5 hours, and react until the mass concentration of acrylic acid drops by 40-50%, then raise the temperature to 110°C and react for 5.5 hour, generate epoxy acrylate;

[0039] b. React maleic anhydride and epoxy acrylate in a molar ratio of 0.8:1.0 to generate water-based epoxy acrylate, add catalyst triethylamine to account for 8‰ of reaction system mass ratio and polymerization inhibitor p-hydroxyanisole 6‰, The reaction temperature was 80°C. The reaction time is 60 minutes, and dimethylethanolamine is added for neutralizatio...

Embodiment 2

[0045] The technique of the present embodiment is: a, according to proportioning bisphenol A type epoxy resin and acrylic acid are raw material by the mol ratio of epoxy group and acrylic acid is 0.95~1.05: 0.95~1.05 feeds intake, bisphenol A type epoxy resin epoxy The equivalent is 189g / eq. Add the catalyst triethylamine to account for 5‰ of the mass ratio of the reaction system and the polymerization inhibitor p-hydroxyanisole 5‰, react for 1.5 hours at 100°C, and react until the mass concentration of acrylic acid drops to 40-50%, then raise the temperature to 115°C for reaction 5.5 hours, generate epoxy acrylate;

[0046] b. Reaction of maleic anhydride and epoxy acrylate in a molar ratio of 0.9:1.0 to generate water-based epoxy acrylate, adding catalyst triethylamine accounted for 5‰ of reaction system mass ratio and polymerization inhibitor p-hydroxyanisole 5‰, The reaction temperature was 80°C. The reaction time is 90 minutes, and dimethylethanolamine is added for neut...

Embodiment 3

[0052] The technique of present embodiment is: a, by proportioning bisphenol A type epoxy resin and acrylic acid are raw material and be 0.95~1.05: 0.95~1.05 feed intake by the mol ratio of epoxy group and acrylic acid. Add the catalyst triethylamine to account for 3‰ of the mass ratio of the reaction system and the polymerization inhibitor p-hydroxyanisole 4‰, react for 2 hours at 100°C, and react until the mass concentration of acrylic acid drops to 40-50%, then raise the temperature to 115°C for reaction 5 hours, generate epoxy acrylate;

[0053] b. React maleic anhydride and epoxy acrylate in a molar ratio of 1.0:1.05 to generate water-based epoxy acrylate, add catalyst triethylamine to account for 3‰ of reaction system mass ratio and polymerization inhibitor p-hydroxyanisole 4‰, The reaction temperature was 85°C. The reaction time is 90 minutes, and dimethylethanolamine is added for neutralization. Add pure water to form a water-based epoxy acrylate with a solid content...

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Abstract

A method of preparing special epoxy resin for water ultraviolet light curing coating includes steps: a) using bisphenol A type epoxy resin and acrylic acid as raw material, adding catalyst of triethylamine and inhibitor of p-hydroxyanisole, reacting at 70-100 DEG C, after mass concentration of acrylic acid lower than 40-50%, raising temperature to 110-120 DEG C until acid value of the system lower than 5mgKOH / 100g and generating epoxy acrylate; b) mixing the maleic anhydride and the epoxy acrylate according mole ratio of 0.8:1.05-0.8:1.05 and reacting water epoxy acrylate, adding catalyst triethylamine and inhibitor of p-hydroxyanisole under temperature of 60-100 DEG C and reacting for 1-3 h, adding dimethlyethanolamine to neutralizing, adding water and obtaining water epoxy acrylate with certain solid content.

Description

technical field [0001] The invention relates to a preparation method of a special epoxy resin for water-based ultraviolet light curing coatings. Background technique [0002] Epoxy resin is widely used in various fields of the national economy due to its high adhesion, low shrinkage, good stability, high mechanical strength, and good processing performance. However, traditional epoxy resin coatings are usually solvent-based, which is limited by environmental pollution and construction safety, while water-based epoxy resin coatings have low volatile organic compound (VOC) content, low odor, safe construction, and electrophoresis. With the advantages of application and water cleaning, the application in the field of general industrial coatings is expanding day by day, and has replaced many conventional solvent-based coatings. Water-based epoxy resins for UV (ultraviolet light) curing coatings are favored because of their advantages such as high hardness of cured film, good ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/10C09D163/10C09D5/02
Inventor 唐光斌徐伟箭李婧婧肖华
Owner CHINA PETROCHEMICAL CORP
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