Epoxy resin composition, prepreg, and carbon fiber-reinforced composite material
US10400076B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 10, 2014 |
| Grant date | Sep 3, 2019 |
| Priority date | — |
| Expiry date | Jun 17, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K3/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An epoxy resin composition including [A1] a hardener represented by Formula (1), and [B] an aromatic epoxy resin having tri- or higher functionality, wherein a carbon nuclear relaxation time T1C corresponding to a benzene ring carbon atom in the main backbone of Formula (1) assigned to 130 ppm in a solid-state 13C-NMR spectrum is 42 seconds or longer, and a prepreg and a carbon fiber-reinforced composite material obtained using the epoxy resin composition: Provided are an epoxy resin composition that provides a carbon fiber-reinforced composite material excellent in tensile strength and compression strength and suitable as a structural material, a prepreg, and a carbon fiber-reinforced composite material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.