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Epoxy resin suitable for pultrusion process and carbon fiber composite material thereof

An epoxy resin and pultrusion molding technology, which is applied in the field of carbon fiber, can solve the problems of high chemical activity of amine curing agent, affecting the molding process of the pulling agent, and affecting the performance of the resin system, so as to achieve the mechanical properties and heat resistance of the cured product Excellent, long pot life, the effect of improving production efficiency

Inactive Publication Date: 2020-07-10
绍兴宝旌复合材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most epoxy resins are cured by amines. The amine curing agent has high chemical activity and short gel time, which makes the pot life of the resin not enough, which seriously affects the manufacturability of the pull agent molding.
Furthermore, the pull agent molding generally adopts an open glue tank, and the resin in the glue tank can be in direct contact with the air. The conventional epoxy resin system will absorb moisture or oxidize during use, which will affect the performance of the resin system.

Method used

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  • Epoxy resin suitable for pultrusion process and carbon fiber composite material thereof

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Experimental program
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Effect test

Embodiment 1

[0023] A low-viscosity epoxy resin system suitable for the drawing agent molding process of this embodiment is a two-component system, the A component is a compounded epoxy resin, and the B component is a curing agent. According to parts by weight, A:B=100:80~110;

[0024] Component A of the resin system includes: 1. Main resin: one or more of bisphenol A type epoxy resin, bisphenol F type resin, and novolac epoxy resin, calculated by weight percentage, the proportion of A component is 50% to 80%; 2. Toughening agent: one or more of nuclear rubber modified epoxy resin, polyurethane modified epoxy resin, and polyethersulfone modified epoxy resin, calculated by weight percentage, accounting for A The proportion of components is 5% to 30%; 3. Diluent: one or two kinds of active diluent and inactive diluent, calculated according to weight percentage, accounting for 30% to 10% of component A;

[0025] The B component of the resin system includes: the curing agent is an acid anhydr...

Embodiment 2

[0041] A carbon fiber composite material using a stretching agent forming process in this embodiment;

[0042] Inject the above compounded components A and B into the injection machine respectively, mix them evenly and inject them into the curing mold, and at the same time introduce the fiber and release cloth into the curing mold for curing and molding. The fibers are carbon fibers or glass fibers.

[0043] One of the low-viscosity liquid resins prepared above and the continuous carbon fiber (T300) were used to prepare a carbon fiber composite material through a stretching agent molding process, and the mechanical properties were tested as shown in Table 2;

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Abstract

The invention relates to an epoxy resin suitable for pultrusion process and a carbon fiber composite material thereof. The system comprises two components, a component A is compounded epoxy resin, anda component B is a curing agent. The weight ratio of the component A to the component B is 100:80-110; wherein the component A comprises matrix resin, a toughening agent and a diluent in a weight ratio of 50-70:5-20:10-30, and the matrix resin is one or more of bisphenol A type epoxy resin, bisphenol F type resin and novolac epoxy resin; the component B is an anhydride curing agent, which can beone or more of methyl tetrahydrophthalic anhydride, methyl hexahydrophthalic anhydride or methyl nadic anhydride. The epoxy resin system adopting the anhydride curing agent has the advantages of low viscosity, long working life and excellent cured product physical properties, and satisfies the requirements of pultrusion process for the properties of the resin system.

Description

technical field [0001] The invention relates to the technical field of carbon fiber, specifically, an epoxy resin and a carbon fiber composite material suitable for a pultrusion molding process. Background technique [0002] Reinforced fiber composites have the advantages of light weight, excellent mechanical properties, and strong designability. Since the advent of reinforced fiber composite materials, they have been widely used in the aerospace field, and have rapidly extended to many aspects such as transportation tracks, medical equipment, sports equipment, and military equipment in a short period of time. Early reinforced fiber composite materials mainly adopt molding methods such as compression molding, autoclave molding, and so on. However, such molding methods are complicated to operate, have low production efficiency, and high production costs, making it difficult to popularize them in various fields. In recent years, the developed stretching agent molding process...

Claims

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Application Information

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IPC IPC(8): C08L63/00C08L63/02C08K7/06C08K7/14C08J5/04
CPCC08L63/00C08J5/042C08J5/043C08L2205/03C08L2205/035C08L2205/025C08L2201/08C08J2363/00C08J2463/00C08J2363/02C08J2463/02
Inventor 廖国峰张继涛杨小兵沈伟叶国方
Owner 绍兴宝旌复合材料有限公司
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