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Epoxy resin composition for fiber-reinforced composite material, prepreg and fiber-reinforced composite material

A technology of epoxy resin and prepreg, which is applied in the field of epoxy resin composition and laminated composite materials, can solve the problems of gel coat layer breakage, increased weight, and unusability, and achieve excellent self-adhesiveness and improved Design freedom, light weight effect

Inactive Publication Date: 2007-03-07
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to obtain excellent surface smoothness, the thickness of the gel coat often reaches more than 200 μm, which not only increases the weight, but also has the disadvantage that the gel coat layer breaks and peels off when the outer panel is deformed by external force
In addition, the composition of the resin used as the gel coat is different from that of the matrix resin of the prepreg. During heat curing, due to the difference in their linear expansion coefficients, the entire molded body will be deformed such as warping, so it is not suitable for use in demanding applications. The problem of the accuracy of the outer plate

Method used

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  • Epoxy resin composition for fiber-reinforced composite material, prepreg and fiber-reinforced composite material
  • Epoxy resin composition for fiber-reinforced composite material, prepreg and fiber-reinforced composite material

Examples

Experimental program
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Effect test

Embodiment 1～5、 comparative example 1～5

[0263] According to the method described above, epoxy resin compositions, prepregs, fiber-reinforced composite materials, and honeycomb sandwich panels were produced, and various physical property values ​​were evaluated. The contents of each example are shown in Table 1.

[0264] In Examples 1 to 5, compared with Comparative Examples 1 to 5, the climbing drum peel strength (CDP) was improved, the compressive strength at the time of high-temperature moisture absorption was also sufficient, and other characteristics were also excellent.

Embodiment 6～11、 comparative example 6～8

[0268] According to the method described above, epoxy resin compositions, prepregs, fiber-reinforced composite materials, and honeycomb sandwich panels were produced, and various physical property values ​​were evaluated. The contents of each example are shown in Table 2.

[0269] Comparing Examples 6 to 11 with Comparative Examples 6 to 8, it can be seen that the adhesiveness between the surface layer panel and the honeycomb core using the climbing drum peel strength (CDP) as an index and the surface roughness of the surface layer panel as an index The prepreg of the present invention is extremely excellent in smoothness.

[0270] Example 6

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Abstract

The present invention provides an epoxy resin composition, which contains at least (a) an epoxy resin having an oxazolidone ring and (b) a glycidylamine type epoxy resin, containing 100 parts by weight of the total epoxy resin 1 to 20 parts by weight of the hard rubber contains an aromatic amine as a curing agent, and the glass transition temperature of the cured product after heating and curing at 180°C for 2 hours is 160 to 220°C.

Description

technical field [0001] The present invention relates to an epoxy resin composition, a prepreg, and a laminated composite material suitable for a lightweight, high-strength, high-rigidity honeycomb laminated composite material. Background technique [0002] Fiber-reinforced composite materials containing reinforcing fibers and matrix resins are widely used in aircraft, automobiles, and industrial applications due to their excellent mechanical properties. Conventionally, as aircraft structural materials, laminates using unidirectional prepregs impregnated with resin in unidirectionally parallel reinforcing fibers, which are compressed under high-temperature and high-humidity environments, have been used. The characteristics are particularly excellent. [0003] On the other hand, in recent years, from the viewpoint of weight reduction, examples of using fiber-reinforced composite materials as skin panels for honeycomb sandwich panels have increased. As the honeycomb cores of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00B29B11/16C08J5/24B29K105/08
Inventor 黑木基弘富冈伸之和田原直美吉冈健一坂田宏明和田原英辅大背户浩树
Owner TORAY IND INC
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