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High-performance epoxy resin composition for sheet molding compound (SMC)

A technology of epoxy resin and composition, applied in application, household appliances, flat products, etc., can solve the problems of high viscosity of epoxy resin, long curing time, inability to chemically thicken, etc., and achieve effective viscosity, excellent mechanical strength, The effect of shortening the curing time

Active Publication Date: 2012-02-01
北京蓝星清洗有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, epoxy resin also has disadvantages such as high viscosity, inability to chemically thicken, and long curing time, which greatly restricts its molding process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 81.0g of bisphenol A glycidyl ether epoxy resin E-51 (purchased from Wuxi Resin Factory of Bluestar Chemical New Materials Co., Ltd., epoxy value 0.48-0.54), 9.0g of glycidylamine epoxy resin Mix JEh-012 (purchased from Changshu Jiafa Chemical Co., Ltd., epoxy value 0.80-0.85), then add 18.0g dicyandiamide and 18.0g 4,4'-diaminodiphenylsulfone (DDS) mixture , then add 2.0g zinc stearate, 45.0g calcium carbonate successively, stir evenly, then add 18.0g toluene diisocyanate and 9.0g polyethylene glycol, continue stirring to obtain the described epoxy matrix resin, promptly get ESMC resin paste. The prepared ESMC resin paste is impregnated with 15-45mm random chopped glass fibers on an impregnating machine, and is rolled by a sheet machine with an easy-to-peel polyethylene film as a diaphragm, and stored at 50°C for 3-4d (thickening ) to obtain ESMC sheet molding compound. The thermal analysis conditions of differential scanning calorimetry (DSC method) are nitrogen pro...

Embodiment 2

[0024] 72.0g of bisphenol A glycidyl ether epoxy resin E-51 (purchased from Wuxi Resin Factory of Bluestar Chemical New Materials Co., Ltd., epoxy value 0.48-0.54), 18.0g of glycidylamine epoxy resin Mix JEh-012 (purchased from Changshu Jiafa Chemical Co., Ltd., epoxy value 0.80-0.85), then add 18.0g dicyandiamide and 18.0g 4,4'-diaminodiphenylsulfone (DDS) mixture , then add 2.0g zinc stearate, 45.0g calcium carbonate successively, stir evenly, then add 18.0g toluene diisocyanate and 9.0g polyethylene glycol, continue stirring to obtain the described epoxy matrix resin, promptly get ESMC resin paste. The prepared ESMC resin paste is impregnated with 15-45mm random chopped glass fibers on an impregnating machine, and is rolled by a sheet machine with an easy-to-peel polyethylene film as a diaphragm, and stored at 50°C for 3-4d (thickening ) to obtain ESMC sheet molding compound. The thermal analysis conditions of differential scanning calorimetry (DSC method) are nitrogen pr...

Embodiment 3

[0026]63.0g of bisphenol A glycidyl ether epoxy resin E-51 (purchased from Wuxi Resin Factory of Bluestar Chemical New Materials Co., Ltd., epoxy value 0.48-0.54), 27.0g of glycidylamine epoxy resin Mix JEh-012 (purchased from Changshu Jiafa Chemical Co., Ltd., epoxy value 0.80-0.85), then add 18.0g dicyandiamide and 18.0g 4,4'-diaminodiphenylsulfone (DDS) mixture , then add 2.0g zinc stearate, 45.0g calcium carbonate successively, stir evenly, then add 18.0g toluene diisocyanate and 9.0g polyethylene glycol, continue stirring to obtain the described epoxy matrix resin, promptly get ESMC resin paste. The prepared ESMC resin paste is impregnated with 15-45mm random chopped glass fibers on an impregnating machine, and is rolled by a sheet machine with an easy-to-peel polyethylene film as a diaphragm, and stored at 50°C for 3-4d (thickening ) to obtain ESMC sheet molding compound. The thermal analysis conditions of differential scanning calorimetry (DSC method) are nitrogen pro...

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PUM

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Abstract

The invention relates to a high-performance epoxy-based resin composition suitable for sheet molding compound (SMC) molding. The epoxy-based resin composition is prepared from the following components in parts by mass: 100 parts of mixed epoxy resin, 20-60 parts of curing agent, 10-40 parts of thickening agent, 0.5-5.0 parts of internal demolding agent and 50-120 parts of filler. The epoxy-based resin is separately selected from glycidyl ether epoxy resin and glycidyl amine epoxy resin or glycidyl ester epoxy resin, the epoxy resin composition has good wettability and bonding strength to fibers, the cured product has excellent heat resistance and mechanical strength, and the epoxy sheet molding compound prepared from the epoxy resin composition provided by the invention is suitable for the occasions with strict requirements on temperature resistance, corrosion resistance and insulation property.

Description

technical field [0001] The invention relates to an epoxy resin composition, especially a high-performance epoxy matrix resin composition suitable for SMC molding, and also relates to a preparation method of the epoxy resin composition. Background technique [0002] SMC molding technology is a closed mold molding composite material technology. It has many advantages over other open molding techniques. Especially because SMC is a closed-mold molding technology, the styrene volatilization during the molding process is significantly lower than that of open-mold molding, realizing a green and environmentally friendly molding process. Therefore, SMC molding technology has attracted more and more attention. [0003] At present, SMC is mainly based on unsaturated polyester resin. However, this kind of unsaturated polyester resin SMC has disadvantages such as temperature resistance, corrosion resistance, relatively poor insulation effect, and low structural strength, so it cannot b...

Claims

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Application Information

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IPC IPC(8): C08L63/02C08L63/00C08K13/02C08K5/098C08K5/29C08K3/26C08K3/22C08J5/18B29D7/01
Inventor 杨刚孟秀青胡伟陈伟明刘欣彤
Owner 北京蓝星清洗有限公司
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