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Prepreg and fiber reinforced composite material

A prepreg and resin composition technology, applied in the field of fiber-reinforced composite materials, can solve the problems of high molding cost, insolvency, poor appearance quality, etc., and achieve excellent appearance quality and improve the effect of commodity value.

Inactive Publication Date: 2013-12-11
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] As a method of improving the physical properties and appearance quality of fiber-reinforced composite materials, for example, the technology disclosed in Patent Document 1 cannot solve problems caused by partial positional displacement of carbon fiber bundles and twisting of partial aggregates of carbon fiber single yarns in carbon fiber bundles. poor appearance
In addition, there is also a method of covering the surface of a molded body with a glass scrim cloth as described in Patent Document 2, and a method of applying a gel coat to a molding die as described in Patent Document 3 and curing it, then using This molding mold is used to mold fiber-reinforced composite materials, transfer the gel coat layer to the surface of the molded body, and make it difficult to distinguish the uneven appearance, but it has the disadvantages of poor effect and high molding cost.

Method used

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  • Prepreg and fiber reinforced composite material
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  • Prepreg and fiber reinforced composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0157] According to the following composition, the epoxy resin composition is prepared by the above-mentioned method (2);

[0158] As the component [B], 20 parts by mass of "Epotohto (registered trademark)" YD128, 50 parts by mass of "jER (registered trademark)" 1001, and 30 parts by mass of "jER (registered trademark)" 154;

[0159] Component [C] is 3.5 parts by mass of DICY7 and 2 parts by mass of "Omicure (registered trademark)" 24;

[0160] As a constituent element [D], 10 parts by mass of "DAIMIC BEADS (registered trademark)" UCN-5051D;

[0161] The component [E] is 1 part by mass of "Mitsubishi (registered trademark)" carbon black RCF#40.

[0162] Measure the refractive index n of the component [D] by the method (5) above 1 And the refractive index n of the cured epoxy resin obtained by curing the resin composition composed of the component [B] and the component [C] 0 , the result is that n 1 =1.49, n 0 =1.59, n 1 / n 0 is 0.94.

[0163] In addition, measure the s...

Embodiment 2～12

[0169] Except for changing the composition as shown in Table 1 and Table 2, an epoxy resin composition, a prepreg, and a fiber-reinforced composite material were obtained in the same manner as in Example 1. The results are shown in Table 1 and Table 2.

[0170] In Examples 4 to 7, and 9 to 11, the viscosity of the obtained prepreg was particularly good.

[0171] In addition, in Example 12, the shear viscosity η of the epoxy resin composition was measured in the same manner as in Example 1. * , as a result, the reaction starts at 80°C and the viscosity begins to increase, so the shear viscosity η at 100°C cannot be measured * . In embodiment 12, measure the shear viscosity η of epoxy resin composition at 80 ℃ * .

Embodiment 13

[0173] Prepare epoxy resin composition 1 by above-mentioned method (2) according to following composition;

[0174] As the component [B], 20 parts by mass of "Epotohto (registered trademark)" YD128, 50 parts by mass of "jER (registered trademark)" 1001, and 30 parts by mass of "jER (registered trademark)" 154;

[0175] Component [C] is 3.5 parts by mass of DICY7 and 2 parts by mass of "Omicure (registered trademark)" 24;

[0176] The component [E] is 1 part by mass of "Mitsubishi (registered trademark)" carbon black RCF#40.

[0177] The shear viscosity η of the epoxy resin composition 1 obtained was measured in the same manner as in Example 1 * , as a result, the shear viscosity η * =2.1Pa·s.

[0178] Moreover, the epoxy resin composition 2 was prepared by the said method (2) according to the following composition.

[0179] As the component [B], 20 parts by mass of "Epotohto (registered trademark)" YD128, 50 parts by mass of "jER (registered trademark)" 1001, and 30 parts by...

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Abstract

This prepreg contains reinforcing fiber (A), an epoxy resin (B) having two or more epoxy groups within a molecule, a compound (C) that can cure the constituent element (B), cross-linked resin particles (D) for which the index of refraction is in a range of 1.49 - 1.61, and carbon black (E). In a range corresponding to an average of 10% of the thickness of the prepreg from the surface of this prepreg the constitution is of constituent elements (B) - (E), and the relationship between the index of refraction (n0) of the cured epoxy resin obtained by curing the resin composition formed from constituent element (B) and constituent element (C) and the index of refraction (n1) of constituent element (D) is 0.92 <= n1 / n0 <= 1.05. The present invention provides a prepreg that can improve uneven appearance in design surfaces of fiber reinforced composite materials and can produce fiber reinforced composite materials having superior quality in external appearance.

Description

technical field [0001] The invention relates to a fiber reinforced composite material. In particular, it relates to a prepreg for obtaining a fiber-reinforced composite material having an excellent appearance quality on a decorative surface, and a fiber-reinforced composite material using the prepreg. Background technique [0002] Fiber-reinforced composite materials made of reinforcing fibers such as carbon fibers and glass fibers and thermosetting resins such as epoxy resins and phenolic resins are lightweight, but have excellent mechanical properties such as strength and rigidity, heat resistance, and corrosion resistance, so they are used in aviation · Aerospace, automobiles, railway vehicles, ships, civil engineering and sports goods and other fields. In recent years, for example, fiber-reinforced composite materials using carbon fibers not only have excellent mechanical properties, but also because carbon fibers are conductive, the composite materials have excellent e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/24
CPCC08J2363/00C08G59/4021C08G59/4215C08G59/5033C08L63/00Y10T428/269Y10T428/249921B32B5/145C08J5/249C08J5/243C08L75/04C08L25/08B32B27/08B32B38/08C08J5/042C08K3/04C08L25/06C08K7/06B32B7/02C08J2425/06C08J2475/04B32B5/16
Inventor 松田亚弓国光佑美川本史织河内真二
Owner TORAY IND INC