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Prepreg for OoA process capable of satisfying EN45545 flame retardant standard

A prepreg and process technology, which is applied in the field of prepreg for OoA process, can solve the problems of adverse effects of resin reactive fiber wettability, changing the overall polarity of resin, and high cost of epoxy resin, so as to achieve wide applicability and reduce The effect of raw materials and excellent mechanical properties

Active Publication Date: 2020-01-21
HENGSHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because it is grafted on the polar group of epoxy resin, the overall flame retardant content is generally relatively low. Generally, when introducing this type of flame retardant resin, the required amount is as much as 60 parts or more. In addition, it is flame retardant itself. The cost of agent grafted epoxy resin is high. Although the addition of flame retardant powder can be reduced to a certain extent, the introduction of flame retardant groups into epoxy resin branch chains increases the reaction steric hindrance and changes the overall polarity of the resin. Reactivity, which adversely affects the reactivity of the final resin and the wettability of the fibers

Method used

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  • Prepreg for OoA process capable of satisfying EN45545 flame retardant standard
  • Prepreg for OoA process capable of satisfying EN45545 flame retardant standard
  • Prepreg for OoA process capable of satisfying EN45545 flame retardant standard

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A prepreg A meeting the flame retardant standard of EN45545 is composed of carbon fiber and a flame retardant resin matrix a, wherein the flame retardant resin matrix a is weighed according to the following parts by mass: 66 parts of epoxy resin, 22 parts of flame retardant, interface 1 part of modifier, 11 parts of curing agent.

[0039] Add 19 parts of bisphenol A epoxy resin, 40 parts of novolac epoxy resin, and 7 parts of phenoxy resin concentrate into the mixing kettle, raise the temperature to 85°C, stir well until the mixture is uniform, add 6 parts of flame retardant ATH, poly 12 parts of ammonium phosphate and 4 parts of zinc borate, fully stirred until mixed evenly, add 1 part of BYK-9920 interface modifier, after fully stirring, lower the temperature to 70°C, add 11 parts of curing agent, stir evenly for 15 minutes and discharge to obtain Flame retardant resin matrix a.

[0040] When coating the flame retardant resin substrate a, control the temperature of t...

Embodiment 2

[0042]A prepreg B meeting the flame retardant standard of EN45545 is composed of carbon fiber and a flame retardant resin matrix b, wherein the flame retardant resin matrix b is weighed according to the following parts by mass: 58 parts of epoxy resin, 31 parts of flame retardant, cured 11 doses.

[0043] Add 15 parts of bisphenol A epoxy resin, 36 parts of novolac epoxy resin, and 7 parts of phenoxy resin concentrate into the mixing kettle, raise the temperature to 85°C, stir well until the mixture is uniform, add 14 parts of flame retardant ATH and melamine 17 parts of uric acid salt, fully stirred until mixed evenly, after fully stirred, lowered the temperature to 70°C, added 11 parts of curing agent, stirred uniformly for 15 minutes and discharged to obtain the flame retardant resin matrix b.

[0044] When coating the flame-retardant resin substrate b, control the temperature of the coating metering roller to 74°C, the gap between the metering rollers to 0.12mm, the pressu...

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Abstract

The invention discloses a prepreg for an OoA process capable of satisfying EN45545 flame-retardant standards. The prepreg comprises carbon fibers and a flame-retardant resin matrix, wherein the flame-retardant resin matrix comprises epoxy resin, a plurality of flame retardants and a curing agent in certain mass components; and the flame retardants include at least two types. By means of the optimized combination of flame retardants, the flame-retardant effect is achieved at different stages of combustion respectively, so that the flame-retardant resin meets the HL1 or HL2 level in the EN45545flame-retardant standard, is also suitable for a low-cost OoA process, reduces the influence on the mechanical properties of a final product, and has excellent mechanical properties after prepreg curing. Meanwhile, the interfacial polarity between the flame retardant and the resin is improved by the interfacial modifier, so that the resin is in more sufficient contact with and infiltrates the fibers after completely infiltrating the powder, the stress transfer between the fibers and the resin is realized, and the characteristic of excellent mechanical properties of the carbon fiber composite material is fully played.

Description

technical field [0001] The invention relates to a prepreg, in particular to a prepreg for an OoA process meeting the flame retardant standard of EN45545, and belongs to the technical field of flame retardant. Background technique [0002] At present, domestic and foreign rail transit rolling stock fire protection standards mainly include the European Union EN45545: 2013 series of standards "Railway Application-Railway Vehicle Fire Protection", British BS 6853: 1999 "General Code for Fire Protection of Passenger Train Design and Construction", German DIN 5510: 2009 Series of standards "Railway Vehicle Fire Protection Measures", UIC 564-2 "Fire Protection and Fire Protection Rules for Railway Passenger Cars or Similar Vehicles Used by International Railway Union" of the International Union of Railways, NFPA 130 "Fixed Rail Transit and Passenger Railway System" of the United States, French NF F16-101 / 102 "Fireproof Performance of Railway Vehicles" and TB / T 3237-2010 "Technical ...

Claims

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Application Information

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IPC IPC(8): C08L63/04C08L63/00C08K3/22C08K7/06C08K3/32C08K3/38C08K5/3492C08J5/24
CPCC08J5/24C08J2363/04C08J2463/00C08K2003/2227C08K2003/323C08K2003/387C08K5/34928
Inventor 李志涛钱京尹国强单瑞俊毛慧文
Owner HENGSHEN
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