Unlock instant, AI-driven research and patent intelligence for your innovation.

Method of catalyzing esterification of carboxylic acid and epoxy 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 storage instability of acrylic epoxy ester, the limitation of production and application of acrylic epoxy ester, etc. problem, to achieve the effect of good catalytic activity, small viscosity change, and high catalytic selectivity

Inactive Publication Date: 2004-12-22
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
View PDF0 Cites 2 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Add 57g of epoxy E-51 (epoxy value 5.10mol / kg) into a 250ml three-neck round bottom flask, stir mechanically, and take an oil bath at 120°C, and take another 10.32g of acrylic acid (0.1435mol), 0.3610g of tris(acetylacetonate) Iron (III) and 0.0612g p-hydroxyanisole were mixed and added to the epoxy resin. After stirring for 3 hours, the conversion rate of acrylic acid in the system reached 99.2%. .

Embodiment 2

[0019] Add 117.5g of epoxy 828 (epoxy value 5.26-5.42mol / kg) into a 250ml three-neck round bottom flask. Mechanical stirring, oil bath 110 ℃, take another 23.33g acrylic acid (0.3237mol), 0.2143g tetrakis (acetylacetonate) zirconium (IV), 0.1342g p-hydroxyanisole, add to the epoxy resin after mixing, stir After reacting for 7 hours, the conversion rate of acrylic acid in the system reached 98.5%.

Embodiment 3

[0021] Add 86.5g of epoxy 827 (epoxy value 5.43-5.59mol / kg) into a 250ml three-necked round-bottomed flask, stir mechanically, and put an oil bath at 80°C. Take another 0.3548g of tris(acetylacetonate) complex iron (III) and 0.1023 g p-hydroxyanisole, dissolve 17.17g acrylic acid (0.2383mol), then join in the epoxy resin, the transformation rate of the acrylic acid in the system reaches 98.7% after stirring reaction 5h, at 80 ℃, three (acetylacetonate) Iron(III) still has a strong catalytic effect on the esterification of acrylic acid and epoxy.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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 present invention relates to the method for the esterification reaction of epoxy compound and carboxylic acid. technical background [0002] The reaction product of epoxy compound and carboxylic acid, in which unsaturated monobasic acid and epoxy compound are added to a class of polymers with unsaturated double bonds at the end group, also known as vinyl ester resin (commonly used unsaturated Monobasic acids include acrylic acid, methacrylic acid, phenylacrylic acid, crotonic acid, etc. Commonly used epoxy compounds include bisphenol A epoxy resin and its homologues, bisphenol F epoxy resin, novolac epoxy resin, tetrabromobis phenolic epoxy resin, diepoxidized 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 characteristics of low curing shrinkage rate of epoxy resin, chemical resistance, and excellent electrical insulatio...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C07C67/24
Inventor 刘红波陈鸣才许凯
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI