Latent urethane resin systems
US4390679A · kind A · utility
9Cited by
8References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1981 |
| Grant date | Jun 28, 1983 |
| Priority date | — |
| Expiry date | Dec 17, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S528/906
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Urethane resins containing, as latent hardeners, the reaction products of an acid anhydride or imide, such as phthalic anhydride, and an aromatic or cycloaliphatic polyamine, said resin systems being stable for long periods when stored at ambient or moderately elevated temperatures while providing on curing for relatively short periods at elevated temperatures, on the order of 100.degree.-150.degree. C., hardened products of good properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.