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Prepreg and carbon-fiber-reinforced composite material

A prepreg, carbon fiber cloth technology, applied in the direction of carbon fiber, fiber processing, thin material processing, etc., can solve the problems of low reactivity, difficult to achieve high adhesion of matrix resin, etc.

Active Publication Date: 2015-04-01
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] For example, Patent Document 1 discloses that in order to improve the adhesion between carbon fibers and the sizing agent, the sizing agent has an inclined structure. However, in Patent Document 1 and any other documents (Patent Documents 2 to 5, etc.), there is no following Technical idea, that is, the surface of the size layer satisfies the reaction of the epoxy compound (which has high adhesion to carbon fiber) and the components in the matrix at the same time, and achieves high adhesion to the matrix resin
[0012] In addition, Patent Document 6 discloses that a polyfunctional aliphatic compound exists in the inner layer of the sizing agent, and an aromatic epoxy resin and an aromatic reactant with low reactivity exist in the outer layer. However, since there is no polyfunctional aliphatic compound with high adhesion in the surface layer of the sizing agent, it is difficult to achieve high adhesion with the matrix resin

Method used

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  • Prepreg and carbon-fiber-reinforced composite material
  • Prepreg and carbon-fiber-reinforced composite material
  • Prepreg and carbon-fiber-reinforced composite material

Examples

Experimental program
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Effect test

Embodiment approach 1

[0110] The prepreg according to Embodiment 1 of the present invention is characterized in that it is a prepreg prepared by impregnating a thermosetting resin composition into sizing-coated carbon fibers coated with a sizing agent, the sizing agent being at least Containing an aliphatic epoxy compound (A) and an aromatic epoxy compound (B1) as an aromatic compound (B), for the sizing agent coated carbon fiber, by X-ray photoelectron spectroscopy at a photoelectron take-off angle of 15° C measured on the surface of the sizing agent applied to the carbon fiber 1s In the core level energy spectrum (a) the height (cps) of the components assigned to the bond energy of CHx, C-C, and C=C (284.6eV) and (b) the bond energy assigned to C-O (286.1eV) The ratio (a) / (b) of the height (cps) of the components is 0.50 to 0.90, and the thermosetting resin composition is an epoxy resin composition comprising at least the following constituent elements, the constituent elements being (D): Epoxy ...

Embodiment approach 2

[0353] The prepreg according to Embodiment 2 of the present invention is characterized in that it is a prepreg prepared by impregnating a thermosetting resin composition into sizing agent-coated carbon fibers coated with a sizing agent containing The aliphatic epoxy compound (A) and the aromatic compound (B) contain at least an aromatic epoxy compound (B1), and the carbon fiber is coated with the sizing agent by using AlKα 1,2 As the X-ray photoelectron spectroscopy of the X-ray source, the C of the sizing agent surface coated on the carbon fiber is measured with a photoelectron take-off angle of 15° 1sIn the core level energy spectrum (a) the height (cps) of the components assigned to the bond energy of CHx, C-C, and C=C (284.6eV) and (b) the bond energy assigned to C-O (286.1eV) The ratio (a) / (b) of the height (cps) of the components is 0.50 to 0.90, and the thermosetting resin composition includes at least epoxy resin (D1), latent curing agent (E), and has the following gen...

Embodiment approach 3

[0479] The prepreg according to Embodiment 3 of the present invention is characterized in that it is a prepreg prepared by impregnating an epoxy resin composition into sizing-coated carbon fibers coated with a sizing agent, the sizing agent Containing an aliphatic epoxy compound (A) and at least an aromatic epoxy compound (B1) as an aromatic compound (B), for the sizing agent coated carbon fiber, by using AlKα 1,2 As the X-ray photoelectron spectroscopy of the X-ray source, the C measured on the surface of the sizing agent coated on the carbon fiber with a photoelectron take-off angle of 15° 1s In the core level energy spectrum (a) the height (cps) of the components assigned to the bond energy of CHx, C-C, and C=C (284.6eV) and (b) the bond energy assigned to C-O (286.1eV) The ratio (a) / (b) of the height (cps) of the components is 0.50 to 0.90, and the epoxy resin composition contains at least epoxy resin (D1) and latent curing agent (E) by the following An epoxy resin compos...

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Abstract

Provided are a prepreg and a carbon-fiber-reinforced composite material having excellent long-term storage stability and adhesiveness between a carbon fiber and a matrix resin. The present invention is a prepreg made by impregnating a sizing-agent-coated carbon fiber, which is coated with a sizing agent including an aliphatic epoxy compound (A) and an aromatic epoxy compound (B1), with a thermosetting resin composition including a thermosetting resin (D), a latent curing agent (E), and, if necessary, an additive (F) other than the thermosetting resin (D) and the latent curing agent (E), the prepreg being characterized in that the ratio ((a) / (b)) between (a) the height of a binding energy component attributed to CHx, C-C, and C=C and (b) the height of a binding energy component attributed to C-O in a C1s core spectrum obtained by measuring the surface of said sizing-agent-coated carbon fiber by X-ray photoelectron spectroscopy is within a predetermined range.

Description

technical field [0001] The present invention relates to a prepreg and a carbon fiber-reinforced composite material suitable for sports applications such as golf clubs, fishing rods, and other general industrial applications including aircraft components, spacecraft components, automobile components, and ship components. More specifically, the present invention relates to a prepreg and a carbon fiber-reinforced composite material that have excellent adhesion between a matrix resin and carbon fibers, and can suppress a decrease in mechanical properties during long-term storage. Background technique [0002] In recent years, fiber-reinforced composite materials using carbon fibers or aramid fibers as reinforcing fibers have been used in structural materials such as aircraft and automobiles, tennis rackets, golf balls, etc., by taking advantage of their high specific strength and specific elastic modulus. Sports and general industrial uses such as rods and fishing rods, etc. ...

Claims

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Application Information

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IPC IPC(8): C08J5/24D06M13/11D06M15/55D06M101/40
CPCC08G59/38D06M13/11C08L63/00D06M15/55C08J2363/00D06M2101/40C08J5/042C08J5/06Y10T428/249944B29K2063/00B29K2105/0872B29K2307/04C08K5/1515C08J5/248B29C70/46C08G59/5033C09D163/00C08J5/243
Inventor 荒井信之市川智子大皷宽远藤真小林正信三角润
Owner TORAY IND INC
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