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Halogen-free flame-retardant epoxy resin composition

A technology of epoxy resin and composition, applied in the field of halogen-free flame retardant epoxy resin composition, can solve the problems of affecting mechanical properties, not having very strict requirements for "chlorine" content, not meeting the requirements of low heat release, etc. Effects of smoke production and low smoke toxicity

Pending Publication Date: 2020-09-29
深圳市郎搏万先进材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prepreg resins produced by the existing flame retardant technology are generally not qualified in terms of heat release, and cannot meet the EN45545 / R1 / HL3 flame retardant grade of the rail transit industry and the low heat release of the FAR25.853 flame retardant grade of aircraft cabin interior materials Require
[0003] One of the existing technologies uses a phosphorus-nitrogen system as a flame retardant, which affects the mechanical properties and the combustion heat release is too high
[0004] The second state of the art is that phosphorus-containing epoxy resin is made of DOPO, and the phosphorus content of the final epoxy resin is generally 1% to 5%. In order to ensure the flame-retardant effect, it is necessary to add a large amount of this low-phosphorus content Epoxy resin, which makes it impossible to add other functional epoxy resins, such as toughened epoxy resin to improve mechanical properties, and high temperature resistant epoxy resin to improve the high temperature resistance of products
[0005] The third flame-retardant epoxy resin composition of the prior art generally does not have very strict requirements on the "chlorine" content in the epoxy resin used, resulting in the production of hydrogen chloride after the cured product is burned, which greatly affects the smoke toxicity of the final composite product.
[0006] When adding aluminum hydroxide and magnesium hydroxide to the flame retardant epoxy resin composition of the fourth prior art, it is not required to treat the two flame retardant fillers with epoxy silane coupling agent, epoxy silane Coupling agent treatment can greatly improve the mechanical properties of epoxy resin; and there is no requirement that the particle size of these two fillers should be less than or equal to 1 micron. If the particle size is too large, it can be used as a flame-retardant filler in the resin when making flame-retardant prepregs. It cannot be infiltrated into every fiber in the tow, which greatly affects the flame retardant performance of composite products

Method used

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  • Halogen-free flame-retardant epoxy resin composition
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The composition is composed of high phosphorus epoxy resin, polyphenyl ring structure epoxy resin, ultrafine aluminum hydroxide, ultrafine magnesium hydroxide, synergistic flame retardant, smoke suppressant, toughening agent, curing agent and accelerator Composition, set components by mass fraction as follows:

[0052] High phosphorus epoxy resin 10%~30%

[0053] Polyphenyl ring structure epoxy resin 30%~80%

[0054] Ultrafine aluminum hydroxide 10%~40%

[0055] Superfine magnesium hydroxide 10%~40%

[0056] Synergistic flame retardant 1%~15%

[0057] Toughener 1%~15%

[0058] Curing agent 10%~40%

[0059] Accelerator 1%~5%

[0060] The rest are smoke suppressants.

[0061] The halogen-free flame-retardant epoxy resin composition is synthesized from epoxy resin with high phosphorus content, and the phosphorus content is not less than 15%; a flame-retardant epoxy resin composition made of epoxy resin with high phosphorus content ; The halogen-free flame-retardant...

Embodiment 2

[0063] A kind of halogen-free flame-retardant epoxy resin composition, described composition sets components according to following mass fraction:

[0064] High phosphorus epoxy resin 10%~25%

[0065] Polyphenyl ring structure epoxy resin 40%~80%

[0066] Ultrafine aluminum hydroxide 10%~35%

[0067] Superfine magnesium hydroxide 10%~38%

[0068] Synergistic flame retardant 2%~13%

[0069] Toughener 2%~15%

[0070] Curing agent 10%~30%

[0071] Accelerator 1%~5%

[0072] The rest are smoke suppressants.

[0073] The halogen-free flame-retardant epoxy resin composition is synthesized from epoxy resin with high phosphorus content, and the phosphorus content is not less than 15%; a flame-retardant epoxy resin composition made of epoxy resin with high phosphorus content ; The halogen-free flame-retardant epoxy resin composition is a material for preparing flame-retardant prepregs.

Embodiment 3

[0075] A kind of halogen-free flame-retardant epoxy resin composition, described composition sets components according to following mass fraction:

[0076] High phosphorus epoxy resin 15%~25%

[0077] Polyphenyl ring structure epoxy resin 40%~70%

[0078] Ultrafine aluminum hydroxide 12%~35%

[0079] Superfine magnesium hydroxide 13%~38%

[0080] Synergistic flame retardant 2%~13%

[0081] Toughener 2%~11%

[0082] Curing agent 10%~20%

[0083] Accelerator 1%~5%

[0084] The rest are smoke suppressants.

[0085] The halogen-free flame-retardant epoxy resin composition is synthesized from epoxy resin with high phosphorus content, and the phosphorus content is not less than 15%; a flame-retardant epoxy resin composition made of epoxy resin with high phosphorus content ; The halogen-free flame-retardant epoxy resin composition is a material for preparing flame-retardant prepregs.

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Abstract

The invention discloses a halogen-free flame-retardant epoxy resin composition. The composition comprises epoxy resin with high-phosphorus-content epoxy resin, epoxy resin with a multi-benzene-ring structure, ultrafine aluminum hydroxide, ultrafine magnesium hydroxide, synergistic flame retardants, a smoke suppressant, a toughening agent, a curing agent and an accelerant. The resin composition ishalogen-free, environment-friendly, high-efficiency, flame-retardant, low in smoke amount, low in smoke toxicity, and low in heat release. A flame-retardant prepreg laminated board prepared from the resin meets the UL94-V0 flame-retardant standard, meets the requirement of the highest flame-retardant grade of the European standard EN45545-2 / R1 / HL3 in the rail transit industry, and meanwhile meetsthe FAR 25.853 flame-retardant and fireproof test requirements of an aircraft cabin internal material.

Description

technical field [0001] The invention relates to a halogen-free flame-retardant epoxy resin composition. Background technique [0002] Most of the existing technologies use additive phosphorus nitrogen flame retardants to make prepreg resins. Additive flame retardants do not participate in the reaction, which greatly reduces the mechanical properties of composite products. The prepreg resins produced by the existing flame retardant technology are generally not qualified in terms of heat release, and cannot meet the EN45545 / R1 / HL3 flame retardant grade of the rail transit industry and the low heat release of the FAR25.853 flame retardant grade of aircraft cabin interior materials Require. [0003] One of the existing technologies uses a phosphorus-nitrogen system as a flame retardant, which affects the mechanical properties and releases too much heat of combustion. [0004] The second state of the art is that phosphorus-containing epoxy resin is made of DOPO, and the phospho...

Claims

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Application Information

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IPC IPC(8): C08L63/00C08K13/02C08K3/22C08J5/24
CPCC08L63/00C08J5/24C08L2201/02C08L2201/22C08L2205/025C08K2003/2227C08K2003/2224C08J2363/00C08J2463/00C08K13/02C08K3/22
Inventor 康红伟
Owner 深圳市郎搏万先进材料有限公司