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.
More Like This:
Inventors:
OCHI TAKASHI (JP)
WATARI RYOHEI (JP)
ARAI ATSUHITO (JP)
WATARI RYOHEI (JP)
ARAI ATSUHITO (JP)
Application Number:
PCT/JP2020/046004
Publication Date:
July 01, 2021
Filing Date:
December 10, 2020
Export Citation:
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:
WO2014017340A1 | 2014-01-30 | |||
WO2006095516A1 | 2006-09-14 | |||
WO2013100024A1 | 2013-07-04 | |||
WO2003040206A1 | 2003-05-15 | |||
WO2018207728A1 | 2018-11-15 | |||
WO2012124450A1 | 2012-09-20 |
Foreign References:
JP2005298815A | 2005-10-27 | |||
JP2006291093A | 2006-10-26 | |||
JP2009263550A | 2009-11-12 | |||
JP2014145017A | 2014-08-14 | |||
JP2010202727A | 2010-09-16 | |||
JPH01104624A | 1989-04-21 | |||
JP2017197665A | 2017-11-02 |
Download PDF:
Previous Patent: INFORMATION PROCESSING SYSTEM, INFORMATION PROCESSING METHOD, AND PROGRAM
Next Patent: SWITCHING MODULE AND POWER SUPPLY SYSTEM
Next Patent: SWITCHING MODULE AND POWER SUPPLY SYSTEM