Title:
PREPREG AND METHOD FOR PRODUCING PREPREG
Document Type and Number:
WIPO Patent Application WO/2022/113976
Kind Code:
A1
Abstract:
The present invention provides a prepreg which has good handling properties and little resin flow, thereby making work in the molding process easy and improving the dimensional accuracy of a molded body. In order to achieve the above, the present invention provides a prepreg which comprises a fiber base material and a resin layer that is superposed on one surface of the fiber base material and contains a thermosetting resin composition that contains at least the constituents (A) and (B) described below, wherein: the fiber base material is impregnated with some of the thermosetting resin composition in the resin layer; if the resin layer-side surface of the fiber base material is taken as the resin surface and the surface on the reverse side is taken as the fiber base material surface, there is a difference between the tack force of the resin surface and the tack force of fiber base material surface; the complex viscosity η3*24 of the thermosetting resin composition at 24°C is from 20,000 Pa·s to 100,000 Pa·s and the complex viscosity η3*70 thereof at 70°C is from 100 Pa·s to 5,000 Pa·s; and if the mass of the entire prepreg is taken as 100% by mass, the volatilization amount of the thermosetting resin composition is 1% by mass or less. (A) a thermosetting resin
(B) a curing agent for the component (A)
Inventors:
MACHIDA GINPEI (JP)
TAKETA ICHIRO (JP)
SAKATA HIROAKI (JP)
TAKETA ICHIRO (JP)
SAKATA HIROAKI (JP)
Application Number:
PCT/JP2021/042920
Publication Date:
June 02, 2022
Filing Date:
November 24, 2021
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
B32B5/28; B32B37/14; C08J5/18; C08J5/24
Domestic Patent References:
| WO2017094633A1 | 2017-06-08 | |||
| WO1996002592A1 | 1996-02-01 | |||
| WO2014157100A1 | 2014-10-02 | |||
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Foreign References:
| JP2006111737A | 2006-04-27 | |||
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