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A kind of epoxy resin composition and epoxy resin mixture and its preparation method and epoxy resin prepreg and composite material

A technology of epoxy resin and novolac epoxy resin, which is applied in the field of composite materials, can solve the problems of insufficient flame retardant performance of flame retardants and insufficient attention to smoke density, and achieve the effect of excellent flame retardant performance and low smoke density

Active Publication Date: 2020-02-07
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problem that the flame retardancy of the existing flame retardants is not high enough and / or the smoke density is not enough, and provide a kind of epoxy resin composition and epoxy resin mixture and its preparation method and epoxy resin pretreatment Dips and Composites

Method used

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  • A kind of epoxy resin composition and epoxy resin mixture and its preparation method and epoxy resin prepreg and composite material

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preparation example Construction

[0042] According to the second aspect of the present invention, a kind of preparation method of epoxy resin mixture is provided, wherein, described epoxy resin mixture is prepared with epoxy resin composition of the present invention as raw material, and described preparation method comprises the following steps:

[0043] (1) Grinding optional liquid epoxy resin with curing agent and accelerator to obtain abrasive;

[0044] (2) melting optional semi-solid and / or solid epoxy resin, optional novolak epoxy resin, toughening modified epoxy resin and flame retardant to obtain lava material;

[0045] (3) stirring and mixing the lava material obtained in step (2) with the abrasive material obtained in step (1) at 55-80°C,

[0046] Wherein at least one of the liquid epoxy resin and the semi-solid and / or solid epoxy resin exists in combination with an optional novolac epoxy resin as the epoxy resin raw material.

[0047] According to the preparation method of the present invention, in...

Embodiment 1

[0062] (1) prepare epoxy resin composition, this epoxy resin composition comprises:

[0063] 16 parts by weight of liquid bisphenol A epoxy resin (25 ℃ viscosity is 13800cps, epoxy equivalent is 186g / eq, density is 1.16g / cm 3 ),

[0064] The bisphenol A type semi-solid epoxy resin of 11 weight parts (epoxy equivalent is 253g / eq, and the specific gravity at 20 ℃ is 1.18),

[0065] The bisphenol A type solid epoxy resin of 21 weight parts (epoxy equivalent is 482g / eq, and 25 ℃ softening point is 69, and 25 ℃ density is 1.18g / cm 3 ),

[0066] The nitrile rubber modified epoxy resin of 7 weight parts (epoxy equivalent is 358g / eq, and the viscosity at 25 ℃ is 480000mPa.s; Manufacturer is Jiadida New Material Company, trade mark is 861340),

[0067] The dicyandiamide curing agent (particle diameter D98=10 μ m) of 5 weight parts,

[0068] 2.5 parts by weight of the 2,4 toluene bisdimethylurea accelerator (isomer grade, U.S. CVC manufacturer, U24M brand, particle diameter D98=44 μ...

Embodiment 2

[0079] (1) prepare epoxy resin composition, this epoxy resin composition comprises:

[0080] 17.5 parts by weight of liquid bisphenol A epoxy resin (25 ℃ viscosity is 13800cps, epoxy equivalent is 186g / eq, density is 1.16g / cm 3 ),

[0081] The bisphenol A type semi-solid epoxy resin of 11 weight parts (epoxy equivalent is 253g / eq, and the specific gravity at 20 ℃ is 1.18),

[0082] The bisphenol A type solid epoxy resin of 16.5 weight parts (epoxy equivalent is 482g / eq, and 25 ℃ softening point is 69, and 25 ℃ density is 1.18g / cm 3 ),

[0083] The dimer acid-modified epoxy resin of 8 weight parts (epoxy equivalent is 580g / eq, and the viscosity at 50 ℃ is 52000cps; Manufacturer is Shanghai Zhongsi Industrial Co., Ltd., trade mark is ERS-172),

[0084] The dicyandiamide curing agent (particle diameter D98=10 μ m) of 4.5 parts by weight,

[0085] The 2,4 methyl bis-dimethylurea accelerant of 2 parts by weight (manufacturer is Degussa, the trade mark is UR500, particle diamete...

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Abstract

The invention relates to the field of composite materials, in particular to an epoxy resin composition and composite material and a preparation method thereof. The epoxy resin composition comprises, by weight of 100 parts, 40-50 parts of epoxy resin, 6-10 parts of toughening modification epoxy resin, 2-6 parts of curing agents, 1-4 parts of accelerators and a 30-50 parts of flame retardants, the flame retardants comprise polyphosphate acid amine and melamine cyanurate, and the weight ratio of the polyphosphate acid amine to the melamine cyanurate is 1:0.5-1. The epoxy resin composition and composite material has good flame resistance and has low smoke density in burning.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to an epoxy resin composition, an epoxy resin mixture and a preparation method thereof, as well as epoxy resin prepregs and composite materials. Background technique [0002] Epoxy resin has good mechanical properties, adhesive properties, chemical stability and electrical insulation properties, making it widely used as composite resin matrix and electronic packaging materials in the fields of transportation, energy, aerospace, electronics, machinery, coatings, etc. application. [0003] However, epoxy resin has flammable properties, so as epoxy resin is used more and more widely, it also brings a greater risk of fire, so find a suitable epoxy resin with better resistance Flame retardants are very important. [0004] Although there are many types of flame retardants, the most widely used ones are mainly halogenated flame retardants. Halogenated flame retardants will cause dioxi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08K13/06C08K9/10C08K3/32C08K5/3492C08J5/24
CPCC08J5/24C08J2363/00C08J2463/00C08L63/00C08L2201/02C08L2205/02C08L2205/035C08K13/06C08K9/10C08K2003/323C08K5/34928
Inventor 周维段平平孙永亮张燕平李斌
Owner BYD CO LTD
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