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Patent Searching and Data


Title:
PREPREG
Document Type and Number:
WIPO Patent Application WO/2021/131740
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a prepreg that yields a carbon fiber composite material that has exceptional tensile strength, heat resistance, and impact resistance and is suitable as a structural material of an aircraft body, wherein the resin composition used in the prepreg furthermore has exceptional viscosity stability. A prepreg containing a resin composition that contains carbon fibers and at least the constituent elements [A]–[D] indicated below, wherein: the epoxy resin of constituent element [A] contains [A1] and [A2]; [A1] has an epoxy equivalent of 200-265 g/eq (inclusive), the [A1] content of constituent element [A] being 5–45 parts by mass (inclusive); the [A2] content is 55–95 parts by mass (inclusive); [A2] includes at least [A2-1] and [A2-2]; the ratio [A2-1]/[A2-2] is 0.7–4.0 (inclusive) by mass; and the viscosity increase rate when the resin composition is held for two hours at 80°C is 20% or less. Constituent element [A] is an epoxy resin including [A1] and [A2], constituent element [A1] is a dicyclopentadiene epoxy resin, constituent element [A2] is an epoxy resin containing [A2-1] and [A2-2], constituent element [A2-1] is a tetrafunctional liquid epoxy resin, constituent element [A2-2] is a bifunctional liquid epoxy resin, constituent element [B] is a diaminodiphenyl sulfone, constituent element [C] is a polyether sulfone, and constituent element [D] is aspherical polymer particles.

Inventors:
OCHI TAKASHI (JP)
WATARI RYOHEI (JP)
ARAI ATSUHITO (JP)
Application Number:
PCT/JP2020/046004
Publication Date:
July 01, 2021
Filing Date:
December 10, 2020
Export Citation:
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Assignee:
TORAY INDUSTRIES (JP)
International Classes:
C08G59/24; C08G59/50; C08J5/24; C08K5/41; C08K7/06; C08L63/00; C08L81/06; C08L101/00
Domestic Patent References:
WO2014017340A12014-01-30
WO2006095516A12006-09-14
WO2013100024A12013-07-04
WO2003040206A12003-05-15
WO2018207728A12018-11-15
WO2012124450A12012-09-20
Foreign References:
JP2005298815A2005-10-27
JP2006291093A2006-10-26
JP2009263550A2009-11-12
JP2014145017A2014-08-14
JP2010202727A2010-09-16
JPH01104624A1989-04-21
JP2017197665A2017-11-02
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