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A kind of prepreg based on high temperature resistant composite material resin and preparation method thereof

A technology of composite materials and high temperature resistance, which is applied in the field of composite materials and can solve the problems of limited application range and low heat resistance temperature

Active Publication Date: 2017-03-01
成都鲁晨新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The commonly used epoxy resin system has a low heat resistance temperature (generally less than 150°C), which limits its application range and makes it difficult to play a role in aerospace, friction materials and other fields that require high heat resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Mix novolac epoxy resin F51: glycidylamine epoxy resin (AG-80) at a ratio of 1:1.5 at 80°C for 20 minutes, and then mix epoxy resin: benzoxazine at a ratio of 100:40 At 80°C, stir and mix at a speed of 500rpm for 50min, then impregnate unidirectional carbon fiber cloth at 85°C, and bake at 140°C for 10min to obtain a prepreg; use the prepreg to prepare a composite material in an autoclave, measured The composite material has a glass transition temperature (Tg) of 220°C and has high heat resistance.

Embodiment 2

[0019] Novolac epoxy resin F51: Ester ring epoxy resin (TDE-85) with a ratio of 1:2 at 80°C with stirring at a speed of 500rpm for 20 minutes, and then according to the ratio of epoxy resin: benzoxazine Mix 100:20 at 80°C for 30 minutes, impregnate unidirectional carbon fiber cloth at 90°C, and bake at 150°C for 10 minutes to obtain a prepreg; use the prepreg to prepare a composite material in an autoclave, and measure the composite material Its glass transition temperature (Tg) is 231°C, and it has high heat resistance.

Embodiment 3

[0021] Novolac epoxy resin F51: Hydantoin epoxy resin with a ratio of 1:1.5 at 80°C, stir and mix at a speed of 500rpm for 20min, then press epoxy resin: benzoxazine with a ratio of 100:30 at 80°C Mix for 30 minutes, impregnate unidirectional carbon fiber cloth at 80°C, and bake at 150°C for 15 minutes to obtain a prepreg; use the prepreg to prepare a composite material in an autoclave, and measure the glass transition temperature of the composite material (Tg ) is 205°C and has high heat resistance.

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Abstract

The invention provides a prepreg based on a high-temperature-resistant composite material resin and a preparation method thereof. The preparation method comprises the following steps: preparing an epoxy resin and benzoxazine in a ratio of 100:(20-40), and mixing in an 80-DEG C environment at the rate of 500 rpm for 20-50 minutes; impregnating carbon fibers in the resin at 80-90 DEG C for 7-10 minutes, and baking in a 140-150-DEG C environment for 10-15 minutes to obtain the prepreg for the high-temperature-resistant composite material. The epoxy resin is prepared from a phenol formaldehyde epoxy resin F51 and one of a glycidyl amine epoxy resin (AG-80), an ester ring epoxy resin (TDE-85) and a hydantoin epoxy resin, and the benzoxazine is 3-pyridyl-3,4-dihydro-1,3-benzoxazine. The resin for the high-temperature-resistant composite material has high heat resistance, and satisfies the application demands of the product in the fields with higher requirements for heat resistance.

Description

technical field [0001] The invention belongs to the field of composite materials, and in particular relates to a prepreg based on high temperature resistant composite material resin and a preparation method thereof. Background technique [0002] Carbon fiber reinforced composite material (CFRP) is one of the most advanced composite materials at present. It is widely used as a structural material due to its light weight, high strength, corrosion resistance, self-lubrication, and excellent thermodynamic properties, which is unmatched by other fiber reinforced composite materials. of. It is widely used in foreign advanced strategic and tactical solid rocket motors, such as the three-stage engine casing of the U.S. strategic missile "Dwarf", the composite material skirt of the first, second, and third-stage engine casings of the "Trident", and the militia series engines. Nozzle expansion section, some solid motors and high-speed tactical missiles such as THAAD and ERINT of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08L63/04C08G59/68C08K7/06C08K5/357
Inventor 张华川杨其武王培勇李晓阳刘欣
Owner 成都鲁晨新材料科技有限公司
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