Aromatic polyisocyanurate resins and process therefor
US5322914A · kind A · utility
7Cited by
6References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 13, 1993 |
| Grant date | Jun 21, 1994 |
| Priority date | — |
| Expiry date | Sep 13, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention consists of a composition containing a chemically blocked trimerization catalyst and a polyurethane prepolymer resin or resins with reactive isocyanate groups. In the absence of heat, the catalyst is not active and the solution of catalyst in the resin undergoes no appreciable reaction for periods ranging from hours to weeks depending upon the composition and concentration of the catalysts and the structure and concentration of the isocyanate groups. When heat is applied to the mixture a trimerization reaction occurs which produces a crosslinked polyurethane network with utility as an elastomer or as an adhesive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.