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Epoxy-resin composition for prepreg and preparing method thereof and prepreg

A technology of epoxy resin and phenolic epoxy resin, used in the field of flame retardant coatings, can solve the problems of less research on aging resistance and affect the mechanical properties of epoxy resin body, and achieve good flame retardancy and good aging resistance. Effect

Active Publication Date: 2017-07-07
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the existing technical solutions, the epoxy resin composition for prepreg mainly achieves the flame retardant effect by adding a flame retardant, or increases the flame retardant effect by modifying the flame retardant of the epoxy resin, but both A large amount of flame retardant needs to be added to achieve the ideal flame retardant effect, usually 40% by weight of flame retardant is required, and adding so much flame retardant will often affect the mechanical properties of the epoxy resin body
Moreover, there are few studies on the aging resistance of epoxy resin compositions for prepregs in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0038] In the method for preparing the bisphenol A type epoxy resin modified jointly by organosilicon resin and nano silicon dioxide of the present invention, if water participates in the reaction, after step (b), the water content can also be removed through decompression distillation, In order to obtain bisphenol A type epoxy resin co-modified by organosilicon resin and nano silicon dioxide.

[0039] In the present invention, the curing agent is preferably a latent curing agent. There is no special requirement for the latent curing agent. A latent curing agent commonly used in the art can be used. For example, dicyandiamide, organic acid hydrazide (such as sebacic acid) can be used. dihydrazide), boron trifluoride-amine complexes (such as boron trifluoride ethylamine) and diaminomaleonitrile and its derivatives. The specific types of the aforementioned curing agents are well known to those skilled in the art and will not be repeated here.

[0040]In the present invention, t...

Embodiment 1

[0061] This example is used to illustrate the epoxy resin composition for prepreg of the present invention and its preparation method.

[0062] (1) Dissolve 10 parts by weight of methyltriethoxysilane in 20 parts by weight of absolute ethanol, then add 2 parts by weight of silane coupling agent (purchased from Hangzhou Jessica Chemical Co., Ltd., model KH -550) and 1 part by weight of water, adding nitric acid to adjust the pH value to 4, stirring at 60°C and 100rpm for 2h to obtain a nano-silica solution;

[0063] (2) 10 parts by weight of the nano-silica solution obtained in step (1), 10 parts by weight of silicone epoxy resin (purchased from Shenzhen Jipeng Silicon Fluoride Material Co., Ltd., model SH-024), 10 parts by weight Parts of bisphenol A epoxy resin (purchased from South Asia epoxy resin, model NPEL-144), 2 parts by weight of silane coupling agent (purchased from Hangzhou Jessica Chemical Co., Ltd., model KH-560) and 20 parts by weight Parts of xylene were mixed,...

Embodiment 2

[0067] This example is used to illustrate the epoxy resin composition for prepreg of the present invention and its preparation method.

[0068] (1) Dissolve 10 parts by weight of methyltriethoxysilane in 15 parts by weight of isopropanol, then add 1 part by weight of silane coupling agent (purchased from U.S. Union Carbide, model A-1100) and 0.5 parts by weight of water, adding nitric acid to adjust the pH value to 3.5, stirring at 50° C. and 100 rpm for 3 hours to obtain a nano-silica solution;

[0069] (2) 10 parts by weight of the nano-silica solution obtained in step (1), 8 parts by weight of silicone epoxy resin (purchased from Huizhi Technology (China) Co., Ltd., model ES-008), 8 parts by weight Parts of bisphenol A epoxy resin (purchased from Momentive Epoxy Resin, model is EPIKOTE816), 1 part by weight of silane coupling agent (purchased from U.S. Union Carbon, model is A-187) and 15 parts by weight of Mix toluene, stir at 70° C. and 500 rpm for 4 hours, and then dist...

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PUM

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Abstract

The invention relates to the field of fire retardant coatings, and discloses an epoxy-resin composition for a prepreg and a preparing method thereof and the prepreg. The epoxy-resin composition for the prepreg is prepared from bisphenol-A epoxy resin and / or novolac epoxy resin which are / is modified by nitrogen and / or phosphorus, bisphenol-A epoxy resin jointly modified by organic silicon resin and nano-silicon dioxide, a curing agent and an accelerant. The preparing method of the epoxy-resin composition for the prepreg includes the steps that (1) the bisphenol-A epoxy resin and / or the novolac epoxy resin which are / is modified by the nitrogen and / or the phosphorus and the bisphenol-A epoxy resin jointly modified by the organic silicon resin and the nano-silicon dioxide are mixed and stirred for 20 min to 40 min at the temperature of 75 DEG C to 85 DEG C; (2) the temperature is reduced to be 55 DEG C to 65 DEG C, the curing agent and the accelerant are added, and the mixture is stirred for 20 min to 40 min. The epoxy-resin composition for the prepreg has the good fire resistance and the good anti-aging performance.

Description

technical field [0001] The invention relates to the field of flame-retardant coatings, in particular to an epoxy resin composition for prepreg, a preparation method of the epoxy resin composition for prepreg, and a prepreg. Background technique [0002] Due to its superior performance, epoxy resin is widely used in various fields such as electronics, military industry, aerospace, construction, and transportation. [0003] In recent years, in-depth research has been carried out on improving the flame retardancy of epoxy resins. For example, CN103450636A provides a flame-retardant epoxy resin / lignin / organosilicon composite material and its preparation method. Oxygen resin / lignin / organosilicon composites have excellent mechanical properties and excellent flame retardancy. [0004] In the existing technical solutions, the epoxy resin composition for prepreg mainly achieves the flame retardant effect by adding a flame retardant, or increases the flame retardant effect by modifyi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08K9/06C08K3/36C08J5/24
CPCC08J5/24C08J2363/00C08K2201/011C08L63/00C08L2201/02C08L2205/025C08L2205/03C08K9/06C08K3/36
Inventor 黎宪宽唐冨兰张颖周维
Owner BYD CO LTD
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