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Epoxy resin composition for carbon-fiber-reinforced composite material, prepreg, integrated molding, sheet of fiber-reinforced composite material and cabinet for electrical/electronic equipment

A technology for reinforcing composite materials and composite material boards, which is applied in the direction of fibrous fillers and layered products, can solve the problems of unsatisfactory mechanical properties and light weight, unsatisfactory flame retardancy, and decline in mechanical properties, and achieve excellent and difficult Combustibility and mechanical properties, excellent mechanical properties and light weight, beneficial to thin and light weight

Active Publication Date: 2007-04-11
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this known technology has the following problems: In order to obtain sufficient flame retardancy, a large amount of flame retardant must be added, which causes an increase in the viscosity of the resin composition, resulting in molding defects such as voids, decreased mechanical properties, or due to the specific gravity of the flame retardant Large, so damage the excellent lightness etc.
[0018] As mentioned above, the current situation is that when the molded product integrated with parts made of FRP is used for the above-mentioned applications, not only the mechanical properties and light weight, but also the excellent flame retardancy cannot be satisfied.

Method used

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  • Epoxy resin composition for carbon-fiber-reinforced composite material, prepreg, integrated molding, sheet of fiber-reinforced composite material and cabinet for electrical/electronic equipment
  • Epoxy resin composition for carbon-fiber-reinforced composite material, prepreg, integrated molding, sheet of fiber-reinforced composite material and cabinet for electrical/electronic equipment
  • Epoxy resin composition for carbon-fiber-reinforced composite material, prepreg, integrated molding, sheet of fiber-reinforced composite material and cabinet for electrical/electronic equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0242] The raw materials shown in Table 1 were mixed in the order shown below with a mixer to obtain an epoxy resin composition in which polyvinyl formal was uniformly dissolved. The numerals of the resin compositions in Table 1 represent parts by weight (the same applies hereinafter).

[0243] (a) Stir each epoxy resin raw material and polyvinyl formal while heating to 150-190° C. for 1-3 hours, and dissolve the polyvinyl formal uniformly.

[0244] (b) Lower the temperature of the resin to 90-110° C., add the phosphorus compound, and stir for 20-40 minutes.

[0245] (c) Lower the resin temperature to 55-65°C, add dicyandiamide and 3-(3,4-dichlorophenyl)-1,1-dimethylurea, and knead at this temperature for 30-40 minutes After that, it was taken out from the mixer to obtain a resin composition.

[0246] The resin viscosity of this resin composition at 60° C. was measured by the above-mentioned method and found to be 145 Pa·s. As a result of evaluation of moldability, it was cu...

Embodiment 2～5

[0251] The amount of the red phosphorus flame retardant "NOVARED" 120 was changed from 3 parts by weight to 6 parts by weight, 10 parts by weight, 15 parts by weight, and 2 parts by weight, and the epoxy resin combination was prepared in the same manner as in Example 1 things. When the properties of the obtained epoxy resin composition were evaluated, there was almost no difference in the viscosity of the resin composition and the specific gravity of the cured resin. In addition, all the curability of the resin composition was the same level as that of Example 1. The adhesiveness of the prepreg was adequate except for the addition of 15 parts by weight, and the addition of 15 parts by weight was slightly insufficient in adhesiveness, but it was at a level that did not affect the use.

[0252] The prepreg and the fiber-reinforced composite material board are manufactured according to the above method. The flame retardancy of the obtained fiber-reinforced composite material pl...

Embodiment 6～7

[0258] A resin composition, a prepreg, and a fiber-reinforced composite material were produced in the same manner as in Example 1 except that OMICURE24 was used instead of DCMU as a curing accelerator. Evaluation of various properties was carried out according to the above-mentioned method, and the obtained resin composition could be cured at 150°C for 3 minutes, and the mechanical properties of the composite material were as good as those of Examples 1-4. Regarding the flame retardancy, not only the test pieces with a laminate thickness of about 0.6 mm but also the test pieces with a laminate thickness of about 0.4 mm and about 0.2 mm reached V-0.

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Abstract

A lightweight fiber-reinforced composite material that exhibits excellent flame resistance and mechanical properties and does not emit any halogen gas at combustion; an epoxy resin composition and prepreg suitable for obtaining the above fiber-reinforced composite material; and an integrated molding suitable to electrical / electronic equipment cabinet, in which use is made of the above fiber-reinforced composite material. There is provided an epoxy resin composition for carbon-fiber-reinforced composite material, comprising: [A] epoxy resin, [B] amine curing agent, and [C] phosphorus compound, the component [C] contained in an amount, in terms of concentration of phosphorus atoms, of 0.2 to 15 wt.%.

Description

technical field [0001] The present invention relates to an epoxy resin composition suitable for use as a matrix resin of a carbon fiber reinforced composite material. Specifically, the present invention relates to an epoxy resin composition capable of providing a light-weight cured resin having excellent flame retardancy and mechanical properties, and a prepreg containing the epoxy resin composition. A fiber-reinforced composite material plate composed of cured epoxy resin and carbon fibers. [0002] In addition, the present invention further relates to an integrally molded product suitable for an electric / electronic device housing including the above-mentioned fiber-reinforced composite material sheet. Background technique [0003] Fiber-reinforced composite materials, especially carbon fiber-reinforced composite materials composed of carbon fiber and matrix resin, due to their excellent mechanical properties, are not only used in golf clubs, tennis rackets, fishing rods a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/24B32B5/28C08K3/02C08K3/32C08K5/49C08K9/10C08L63/00C09C1/00C08G59/50
Inventor 本间雅登土谷敦岐本田史郎泽冈龙治中原历
Owner TORAY IND INC
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