Title:
PREPREG AND PRODUCTION METHOD THEREFOR, SLIT TAPE PREPREG, CARBON FIBER-REINFORCED COMPOSITE MATERIAL
Document Type and Number:
WIPO Patent Application WO/2020/003662
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a prepreg having excellent process passability and stackability, and a method for industrially advantageously producing the prepreg. This prepreg comprises at least constituent elements [A]-[E], wherein the prepreg has a structure in which a second layer formed of a second epoxy resin composition containing [B]-[E] is provided adjacent on both surfaces of a first layer formed of [A] and a first epoxy resin composition containing [B]-[D] but substantially not containing [E], the second epoxy resin composition contains 5-15 parts by mass of [D] having a weight-average molecular weight falling within a specific range, and has a storage modulus G' of 8.0 × 105 to 6.0 × 106 Pa, the storage moduli G' at 25°C and 40°C thereof satisfying a particular relationship, and a glass transition temperature of not lower than -10°C but lower than 7°C, and the prepreg contains not less than 1 part by mass but less than 10 parts by mass of the constituent element [D] with respect to a total of 100 parts by mass of the first and second epoxy resin compositions. According to the present invention, particles contain, as main components, [A] carbon fibers, [B] an epoxy resin, [C] a curing agent, [D] a thermoplastic resin, and [E] a thermoplastic resin having a volume-average particle size of 5-50 μm.
Inventors:
KOBAYASHI HIROSHI (JP)
MAEYAMA TAIKI (JP)
KIDO DAISUKE (JP)
IKUSHIMA TAKASHI (JP)
HOSOKAWA NAOFUMI (JP)
OHNISHI HIROKAZU (JP)
MAEYAMA TAIKI (JP)
KIDO DAISUKE (JP)
IKUSHIMA TAKASHI (JP)
HOSOKAWA NAOFUMI (JP)
OHNISHI HIROKAZU (JP)
Application Number:
PCT/JP2019/013096
Publication Date:
January 02, 2020
Filing Date:
March 27, 2019
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
C08J5/24; B32B5/28; B32B27/38; C08L63/00
Domestic Patent References:
| WO2016136052A1 | 2016-09-01 | |||
| WO2019098243A1 | 2019-05-23 | |||
| WO2018135594A1 | 2018-07-26 | |||
| WO2017130659A1 | 2017-08-03 | |||
| WO2012133033A1 | 2012-10-04 | |||
| WO2017104823A1 | 2017-06-22 |
Foreign References:
| JP2014524940A | 2014-09-25 | |||
| JP2013538264A | 2013-10-10 | |||
| JP2015535037A | 2015-12-07 | |||
| JP2017510683A | 2017-04-13 | |||
| JP2006291095A | 2006-10-26 | |||
| JP2008517810W | ||||
| JP2016155915A | 2016-09-01 | |||
| JP2010229211A | 2010-10-14 | |||
| JP2004506789W | ||||
| JPH01104624U | 1989-07-14 |
Other References:
See also references of EP 3798254A4
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