Prepreg and carbon fiber reinforced composite material
US9593238B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 2013 |
| Grant date | Mar 14, 2017 |
| Priority date | — |
| Expiry date | Oct 9, 2033 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06M2101/40
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A prepreg includes; agent-coated carbon fibers coated with a sizing agent; and a thermosetting resin composition impregnated into the sizing agent-coated carbon fibers. The sizing agent includes an aliphatic epoxy compound (A) and an aromatic epoxy compound (B1). The sizing agent-coated carbon fibers are in a shape of woven fabric or braid. The thermosetting resin composition includes a thermosetting resin (D), a thermoplastic resin (F), and a latent hardener (G). The sizing agent-coated carbon fibers have an (a)/(b) ratio in a certain range where (a) is the height of a component at a binding energy assigned to CHx, C—C, and C═C and (b) is the height of a component at a binding energy assigned to C—O in a C1s core spectrum of the surfaces of the sizing agent-coated carbon fibers analyzed by X-ray photoelectron spectroscopy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.