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Patent Searching and Data


Title:
CARBON FIBER SIZING AGENT, AQUEOUS DISPERSION THEREOF, CARBON FIBER BUNDLE HAVING ADSORBED SIZING AGENT, SHEET-SHAPED ARTICLE, AND CARBON FIBER REINFORCED COMPOSITE MATERIAL
Document Type and Number:
WIPO Patent Application WO/2013/027708
Kind Code:
A1
Abstract:
The present invention provides: a carbon fiber sizing agent that can obtain a carbon fiber bundle having a superior effect of improving mechanical properties when composited using a resin; an aqueous dispersion thereof; a carbon fiber bundle; a sheet-shaped article having a carbon fiber bundle; and a composite material. The carbon fiber sizing agent contains: a compound (A) that is an ester of an unsaturated monobasic acid and an epoxy compound having a plurality of epoxy groups in the molecule, and that has at least one epoxy group in the molecule; a urethane acrylate oligomer (B) that is bifunctional and that has a tensile elongation rate of the cured product of at least 40%; and a polyurethane resin (C) having a tensile elongation rate of a dried coating film of 350-900% inclusive. The amounts of A-C contained satisfy the conditions described in the description. The aqueous dispersion disperses the sizing agent. The carbon fiber bundle contains 0.6-3.0 mass% inclusive of the sizing agent. The sheet-shaped article and a pultruded composite material contain the carbon fiber bundle. The composite material contains the sheet-shaped article.

Inventors:
WAKABAYASHI KOUKI (JP)
SUGIURA NAOKI (JP)
HATA MASAHIRO (JP)
TAKEDA SHIGEKAZU (JP)
YOSHIDA KEIGO (JP)
NAKAMURA SHUUICHI (JP)
Application Number:
PCT/JP2012/071018
Publication Date:
February 28, 2013
Filing Date:
August 21, 2012
Export Citation:
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Assignee:
MITSUBISHI RAYON CO (JP)
WAKABAYASHI KOUKI (JP)
SUGIURA NAOKI (JP)
HATA MASAHIRO (JP)
TAKEDA SHIGEKAZU (JP)
YOSHIDA KEIGO (JP)
NAKAMURA SHUUICHI (JP)
International Classes:
D06M15/55; C08L63/00; C08L67/02; C08L75/04; D06M15/564; D06M101/40
Domestic Patent References:
WO2011092962A12011-08-04
Foreign References:
JP2005320641A2005-11-17
JP2002506414A2002-02-26
JPH09250087A1997-09-22
JPH0441779A1992-02-12
JPS5715229B21982-03-29
JPS5352796A1978-05-13
JPH07197381A1995-08-01
JP2008095241A2008-04-24
JP2007231441A2007-09-13
JP2007131959A2007-05-31
Other References:
See also references of EP 2749690A4
Attorney, Agent or Firm:
MIYAZAKI, Teruo et al. (JP)
Akio Miyazaki (JP)
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Claims: