Epoxy latent catalyst
US4331582A · kind A · utility
29Cited by
8References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 14, 1980 |
| Grant date | May 25, 1982 |
| Priority date | — |
| Expiry date | Jan 14, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249998
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A catalyst for forming ambient temperature stable diamino-diphenyl sulfone-epoxy composition comprises the half-salt of a strong aromatic sulfonic acid such as toluene sulfonic acid and an imidazole, preferably an alkylated imidazole such as 2-ethyl-4-methylimidazole. The composition fully cures at moderate temperature to form a humidity resistant resin having a high heat distortion temperature and can be impregnated onto reinforcing fibers such as graphite to form composites.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.