Semipreg, prepreg, resin composite material, and production methods thereof
US11492446B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 22, 2018 |
| Grant date | Nov 8, 2022 |
| Priority date | — |
| Expiry date | Apr 16, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J5/243
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An object of the present invention is to reduce or eliminate a defect (e.g., a void) by achieving (i) a semipreg and a prepreg each of which allows a reduction in residual volatile component and (ii) methods for producing the semipreg and the prepreg, respectively, and consequently to achieve (iii) a fiber-reinforced composite material which has high heat resistance and superior mechanical strength and a (iv) a method for producing the fiber-reinforced composite material. The present invention attains the above object by providing, for example, a semipreg containing: powders of an imide oligomer; and reinforcement fibers, the imide oligomer being represented by a specific general formula (1).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.