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Epoxy resin composition for fiber-reinforced composite material

An epoxy resin and composite material technology, applied in the field of epoxy resin composition for fiber reinforced composite materials, can solve the problems of increased resin viscosity, high reactivity, insufficient toughness, etc. High stability and improved productivity

Active Publication Date: 2009-05-06
YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when such an amine-based curing agent is used in combination with dicyandiamide, as described above, the reactivity with the epoxy resin becomes high, so there is a problem that if the temperature rises to a certain extent, the reaction with the epoxy resin Curing reaction is easy to occur, for example, when the resin film is made, the viscosity of the resin is continuously increased, so the production efficiency of the prepreg is reduced
In addition, when the prepreg is stored in the working environment, the curing reaction progresses, causing the problem that the viscosity and drapability of the prepreg are easily lost.
In addition, although the matrix resin can improve the toughness of the cured resin to a certain extent, in the case of directly bonding the honeycomb and the prepreg, the toughness improved for the purpose of improving the strength of the formed core-skin bonding is not sufficient, and the mechanical properties insufficient

Method used

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  • Epoxy resin composition for fiber-reinforced composite material
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  • Epoxy resin composition for fiber-reinforced composite material

Examples

Experimental program
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Embodiment 1～6 and comparative example 1～4

[0062] As epoxy resin (A), amine curing agent (B), organic acid dihydrazide compound (C), and optional component dicyandiamide (D), thermosetting resin (E), thermoplastic resin (F) are shown in the table An epoxy resin composition was prepared using the following substances in the compounding ratio described in 1 and 2. First, using a planetary mixer set at 125° C., all of the epoxy resin (A) and thermoplastic resin (F) were stirred and mixed for 75 minutes until a uniform resin solution was obtained. Then, the temperature of this planetary mixer is set at 70°C, and when the resin temperature becomes uniform, add amine curing agent (B), organic acid dihydrazide compound (C), dicyandiamide ( D) and all of the thermosetting resin (E) particles were stirred and mixed to prepare an epoxy resin composition.

[0063] ·Epoxy resin (A)

[0064] Resin A-1: ​​N,N,O-triglycidyl-p-aminophenol (MY-0510 manufactured by Handman Adbanst Materials Co., Ltd.)

[0065] Resin A-2: bisphenol F ...

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Abstract

Provided is an epoxy resin composition for fiber-reinforced composite materials, which serves as a matrix resin for a prepreg. This epoxy resin composition is improved in tackiness stability during storage, while maintaining mechanical characteristics. The epoxy resin composition for fiber-reinforced composite materials is characterized by containing 25 to 50 parts by weight of an amine curing agent (B) selected from aliphatic polyamines, alicyclic polyamines and aromatic polyamines, and 1 to 20 parts by weight of an organic acid dihydrazide compound (C) having a melting point of not less than 150 DEG C, per 100 parts by weight of an epoxy resin (A).

Description

technical field [0001] The present invention relates to an epoxy resin composition for a fiber-reinforced composite material, and more specifically, to an epoxy resin composition suitable as a matrix resin for a self-bonding prepreg for a panel of a honeycomb panel. Background technique [0002] Fiber-reinforced composite materials using epoxy resin compositions as matrix resins are widely used in industrial applications such as aircrafts and automobiles due to their excellent mechanical and physical properties. In particular, for aircraft structural materials and interior materials, fiber-reinforced composite materials are frequently used as panels of honeycomb panels from the viewpoint of weight reduction. As the matrix resin, a resin composition mainly composed of epoxy resin and amine curing agent is used, and the cured product has characteristics such as high toughness and high heat distortion temperature. However, as the use of composite materials expands, there is a ...

Claims

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Application Information

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IPC IPC(8): C08G59/56C08J5/24
Inventor 高坂崇岩田充宏伊藤友裕
Owner YOKOHAMA RUBBER CO LTD
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