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Epoxy resin composition for OoA forming hot melting method prepreg

An epoxy resin and agglomerated epoxy resin technology, applied in the field of carbon fiber composite materials, can solve the problems of high cost, low molding efficiency, insufficient toughness of the resin system, etc., and achieve the effects of reducing molding efficiency, improving molding quality, and shortening curing time.

Active Publication Date: 2021-10-19
SHANGHAI COMPOSITES SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the disadvantages of the existing autoclave forming and molding process, such as high cost, low forming efficiency and insufficient toughness of the resin system; in order to improve the forming quality and forming efficiency of composite material structural parts, reduce the process cost, and prepare a high-performance resin system, To broaden the application field of composite materials and provide a fast-curing high-toughness epoxy resin composition for OoA molding hot-melt prepreg

Method used

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  • Epoxy resin composition for OoA forming hot melting method prepreg
  • Epoxy resin composition for OoA forming hot melting method prepreg
  • Epoxy resin composition for OoA forming hot melting method prepreg

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 5 parts of E51 epoxy resin, 44 E20 epoxy resins, 21 parts of 704 epoxy resin, and 20 parts of polyurethane modified epoxy resin were mixed, and the mixture was heated in a 110 ° C oil bath and stirred for 30 min, and was transparent and uniform. Mixture a;

[0041] 6 parts of the dicyan amine curing agent and 1 part of the UR300 promoter were mixed with 10 parts of bisphenol F epoxy resin, and the three-roll milling machine was not less than 3 times, and a mixture B dispersion of the dicyanide curing agent was obtained.

[0042] The temperature of the temperature in the oil bath pan was reduced to 80 ° C, and the mixture B was added to the mixture A high-speed stirring mixture (preferably the stirring speed was 1000 r / min), stirring time was 8 min, so that the solid amine curing agent can be sufficiently dispersed and uniform. After thorough mixing, the epoxy resin composition suitable for use in the OOA molding process was prepared at 110 ° C for 30 min, followed by cure...

Embodiment 2

[0044] 10 parts of E51 epoxy resin, 40 parts E20 epoxy resin, 20 parts of 704 epoxy resin, and 20 parts of the polyurethane modified epoxy resin were mixed, and the mixture was heated in an oil bath in an oil bath for 30 min to obtain transparent and uniform. Mixture a;

[0045] 7 parts of the dicyan amine curing agent and 1 part of the UR300 promoter were mixed with 10 parts of bisphenol F epoxy resin, and the three-roll milling machine was not less than 3 times, and the mixture B dispersed by the dicyanide curing agent was obtained.

[0046] The temperature of the temperature in the oil bath pan was reduced to 80 ° C, and the mixture B was added to the mixture A high-speed stirring mixture (preferably the stirring speed was 2000 r / min), stirring time 10 min, so that the solid amine curing agent can be sufficiently dispersed and uniform. After thorough mixing, the epoxy resin composition suitable for use in the OOA molding process was prepared at 110 ° C for 30 min, followed by...

Embodiment 3

[0048] 15 parts of E51 epoxy resin, 37 parts E20 epoxy resin, 18 parts 704 epoxy resin, and 20 parts of polyurethane modified epoxy resin were mixed, and the mixture was heated in an oil bath pan for 30 min in an oil bath in an oil bath, which was transparent and uniform. Mixture a;

[0049] 8 parts of the dicyan amine curing agent and 1 part of the UR300 accelerator were mixed with 10 parts of bisphenol F epoxy resin, and the three-roll milling machine was not less than 3 times to obtain a mixture B dispersion of the dicyanide curing agent.

[0050] The temperature of the temperature in the oil bath pan was reduced to 80 ° C, and the mixture B was added to the mixture A high speed stir mixture (preferably the stirring speed was 1500 r / min), the stirring time was 9 min, so that the solid amine curing agent can be sufficiently dispersed and uniform. After thorough mixing, the epoxy resin composition suitable for use in the OOA molding process was prepared at 110 ° C for 30 min, f...

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Abstract

The invention discloses an epoxy resin composition for an OoA forming hot melting method prepreg. The preparation method comprises the steps: firstly, preparing modified tough epoxy resin, blending a toughening agent with at least one liquid bifunctional epoxy resin to obtain the modified tough epoxy resin, adding at least one solid epoxy resin at a certain temperature, melting and mixing, and regulating the viscosity to obtain a mixture A; and secondly, enabling a solid latent curing agent and liquid bifunctional epoxy resin to pass through a three-roller grinder so as to enable the curing agent to be uniformly dispersed in the resin to obtain a mixture B, and mixing and uniformly dispersing the mixture A and the mixture B by utilizing mechanical stirring to obtain the epoxy resin composition. The resin system has the advantages of favorable latency, longer viscosity platform, low volatile matter content, high resin reaction activity and favorable fracture toughness. Hot-melt prepreg fibers prepared from the resin have good matching property with the resin, two OoA forming inclusion gas discharging methods are provided, and the prepared composite material is low in porosity and good in mechanical property.

Description

Technical field [0001] The present invention relates to the technical field of carbon fiber composites, and more particularly to a fast-rapidly cured high toughness epoxy resin composition for an OOA molding hot metea prepreg and a preparation method thereof. Background technique [0002] With the movement of China from the aerospace country to the Space State, some carriers are sent by a year of five or six, facing higher density, higher strength scientific research tasks, and the production cycle of the carrier It is required to be more urgent, thus shortening the time of preparation of carrier structures, and now most of the carbon fiber composite structural members still use traditional thermal tanks and molded forming processes, which not only forms long, equipment investment Expensive, high energy consumption, low molding efficiency, unable to meet the rapid and low-cost manufacturing of high-performance composites, hinder the further expansion of composite capacity. Liquid...

Claims

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Application Information

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IPC IPC(8): C08L63/02C08L63/00C08L83/04C08J5/24
CPCC08L63/00C08J5/24C08L2205/025C08L2205/035C08J2363/02C08J2463/00C08J2483/04C08L83/04
Inventor 张琦庄纯鞠博文刘千立谢钟清陈军李钱福唐靳梅徐鑫敏熊琬婕王晓蕾田杰
Owner SHANGHAI COMPOSITES SCI & TECH CO LTD
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