Catalyst and a method for the trimerization of isocyanates
US7091341B2 · kind B2 · utility
5Cited by
7References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 14, 2003 |
| Grant date | Aug 15, 2006 |
| Priority date | — |
| Expiry date | Apr 4, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2115/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method is described of preparing (poly)isocyanurate polyisocyanates by catalytic cyclotrimerization of isocyanates. A catalytic system is used which includes a cyclotrimerization catalyst based on a quatemary ammonium salt and imidazole as a cocatalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.