Catalyst-doped sizing agent for preparation of high areal weight fiber shelf-stable prepreg or molding compound intermediates
US11254793B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 2017 |
| Grant date | Feb 22, 2022 |
| Priority date | — |
| Expiry date | Nov 21, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2463/02
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention provides thermosetting resin pre-impregnated or infused fiber materials or prepregs comprising a thermosetting resin mixture and a fiber material component of a heat resistant fiber, such as carbon fiber, having an areal weight of from 500 to 3,000 g/m2 having a coating of from 0.5 to 4 phr of a latent, particulate curative or solid curative, preferably, dicyandiamide, wherein the prepregs are infused with a thermosetting resin mixture comprising (a) at least one liquid epoxy resin, and (b) a hardener and/or a catalyst, as well as methods of making the same. The prepregs of present invention enables the simple provision of lightweight composites having consistent resin cure throughout.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.