Method of catalyzing esterification of carboxylic acid and expoxy compound

An epoxy compound and esterification technology, which is applied in the preparation of organic compounds, the preparation of carboxylate, chemical instruments and methods, etc., can solve the limitations of the manufacture and application of epoxy acrylate, and the storage instability of epoxy acrylate, etc. problem, to achieve the effect of good catalytic activity, small viscosity change and high catalytic efficiency

Inactive Publication Date: 2003-06-25
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the (meth)acrylic epoxy ester synthesized with this type of catalyst is unstable in storage, and the manufacture and application of (meth)acrylate epoxy ester are limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Add 57g epoxy E-51 (epoxy value 5.10mol / kg) into a 250ml three-necked round bottom flask, stir mechanically, oil bath at 120℃, and take 10.32g acrylic acid (0.1435mol), 0.3610g tris(acetylacetone) complex Iron (III) and 0.0612g p-hydroxyanisole were mixed and added to the epoxy resin. After stirring and reacting for 3 hours, the conversion rate of acrylic acid in the system reached 99.2%. The viscosity of the reaction obtained after half-esterification was placed for half a year and the viscosity increased little after half a year. .

Embodiment 2

[0019] Add 117.5 g of epoxy 828 (epoxy value 5.26 to 5.42 mol / kg) into a 250 ml three-necked round bottom flask. Mechanical stirring, oil bath at 110°C, another 23.33g acrylic acid (0.3237mol), 0.2143g tetrakis (acetylacetone) zirconium (IV), 0.1342g p-hydroxyanisole, mixed and added to epoxy resin, stirring After 7 hours of reaction, the conversion rate of acrylic acid in the system reached 98.5%.

Embodiment 3

[0021] Add 86.5g epoxy 827 (epoxy value 5.43-5.59mol / kg) into a 250ml three-necked round bottom flask, mechanically stir, oil bath at 80℃, take another 0.3548g tris(acetylacetone) complex iron (III) and 0.1 023g p-hydroxyanisole was dissolved in 17.17g acrylic acid (0.2383mol), and then added to the epoxy resin. After stirring and reacting for 5 hours, the conversion rate of acrylic acid in the system reached 98.7%. At 80°C, tris(acetylacetone) complex Iron (III) still has a strong catalytic effect on the esterification reaction of acrylic acid and epoxy.

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PUM

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Abstract

The present invention rlates to the method of catalyzing esterification of carboxylic acid and epoxy compound with acetylacetone-based metal complex as catalyst in the reaction temperature of 70-140 deg.c. The said method can catalyze esterification, alone or corporated, of saturated or unsaturated carboxylic acid and epoxy compound in which catalytic efficiency and selectivity without promoting the ring-opening polymerization of epoxy radical. The said method can wide application foreground in industrial production.

Description

Technical field [0001] The invention relates to a method for the esterification reaction of an epoxy compound and a carboxylic acid. technical background [0002] The reaction product of an epoxy compound and a carboxylic acid, in which an unsaturated monobasic acid and an epoxy compound are added to a type of polymer with an unsaturated double bond at the end group, also known as a vinyl ester resin (commonly used unsaturated Monobasic acids include acrylic acid, methacrylic acid, phenyl acrylic acid, crotonic acid, etc. Commonly used epoxy compounds include bisphenol A epoxy resin and its homologues, bisphenol F epoxy resin, novolac epoxy resin, and tetrabromobisphenol Phenolic epoxy resin, two epoxidized polyoxypropylene, etc.). Vinyl ester resin has a history of more than 30 years since it came out in the late 1960s. It can not only maintain the low curing shrinkage rate of epoxy resin, chemical resistance, and excellent electrical insulation pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/24
Inventor 刘红波陈鸣才许凯
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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