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

A technology of epoxy resin and composition, applied in the field of prepreg and fiber reinforced composite material, can solve the problems of elongation and lower strength, and achieve the effect of excellent strength and storage period

CN114729107APending Publication Date: 2022-07-08TORAY IND INC
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2022-07-08

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Abstract

The present invention addresses the problem of providing an epoxy resin composition which can be suitably used in prepregs and fiber-reinforced composite materials and which has excellent modulus of elasticity, strength and storage life. The present invention is an epoxy resin composition containing the following constituent elements [A]-[C] and satisfying the following conditions (1)-(3). [A]: an epoxy resin, [B]: a polyamine curing agent, and [C]: a compound which has a boiling point of 130 DEG C or higher and a molecular weight m of 50-250 inclusive, does not have an epoxy group in the molecule, and does not substantially have the ability to cure the epoxy resin, (1) at least a portion of the constituent element [C] has two or more alcoholic hydroxyl groups in the molecule, and (2) the constituent element [C] has two or more hydroxyl groups in the molecule. (2) The ratio C / E of the number of moles C of the constituent element [C] and the number of moles E of the epoxy groups of the constituent element [A] satisfying the condition (1) is 0.01-0.20. (3) The viscosity when held at 70 DEG C for 2 hours is 5.0 times or less of the initial viscosity at 70 DEG C.
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Description

technical field

[0001] The present invention relates to an epoxy resin composition suitable for use in fiber-reinforced composite materials for aerospace applications, general industrial applications, sports applications, and the like, as well as prepregs and fiber-reinforced composite materials using the epoxy resin composition. Background technique

[0002] Fiber-reinforced composite materials using carbon fibers, aramid fibers, etc. as reinforcing fibers are widely used in structural materials for aircraft, automobiles, etc., tennis rackets, golf clubs, and fishing rods due to their high specific strength and specific elastic modulus. , bicycles, shells and other sports, general industrial use, etc. As the resin composition used in the fiber-reinforced composite material, thermosetting resins are mainly used from the viewpoints of heat resistance and productivity, and epoxy resins are preferably used from the viewpoints of mechanical properties such as adhesion to reinfor...

Examples

Embodiment

[0066] Hereinafter, the present invention will be described in detail by way of examples. However, the scope of the present invention is not limited by these Examples. It should be noted that the unit "parts" of the composition ratio refers to parts by mass unless otherwise noted. In addition, the measurement of each characteristic (physical property) was performed in the environment of the temperature of 23 degreeC, and the relative humidity of 50% unless otherwise noted.

[0067]

[0068] (1) Component [A]: Epoxy resin

[0069] · "Araldite (registered trademark)" MY0600 (aminophenol type epoxy resin, epoxy equivalent: 118 g / eq, number of epoxy groups: 3, manufactured by ハンツマン アドバンスト マテリアルズ Co., Ltd.)

[0070] "jER (registered trademark)" 825 (bisphenol A epoxy resin, epoxy equivalent: 170 g / eq, number of epoxy groups: 2, manufactured by Mitsubishi Chemical Co., Ltd.)

[0071] Glycidol (molecular weight: 74 g / mol, epoxy equivalent: 74 g / eq, number of epoxy groups: 1, boi...

Embodiment 2～12

[0098] The respective constituent elements [A], [B], and [C] were blended according to the blending ratios in Tables 1 and 2 in the same procedure as in Example 1, to obtain a resin composition.

[0099] As shown in Tables 1 and 2, various measurement results of the examples were obtained. Even when the compounding of the resin composition was changed as in Examples 2 to 12, excellent elastic modulus and strength of the cured resin product were obtained. ,Elongation. In addition, the viscosity increase ratio was also favorable.