Epoxy resins incorporated with imidazole/chromium acetylacetonate and composites thereof
US5672431A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 21, 1996 |
| Grant date | Sep 30, 1997 |
| Priority date | — |
| Expiry date | Feb 21, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31511
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides a curable epoxy resin composition, which includes an epoxy resin; from 10 to 60 percent by weight of the epoxy resin of an amine curing agent; from 0.1 to 5 percent by weight of the epoxy resin of an imidazole accelerator; and from 0.01 to 5 percent by mole of the epoxy resin of chromium acetylacetonate (Cr(acac).sub.3). The resultant cured epoxy resin prepared from the epoxy resin composition of the present invention demonstrates improved fracture toughness. Also, the interlaminar fracture energy of the resultant graphite/epoxy laminate prepared from the cured epoxy resin of the present invention is greater than that of the conventional graphite/epoxy laminate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.