Catalytic trimerization of polyisocyanates
US4067830A · kind A · utility
19Cited by
4References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 29, 1976 |
| Grant date | Jan 10, 1978 |
| Priority date | — |
| Expiry date | Mar 29, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2115/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Compounds (aminimides) of the class wherein a negatively charged nitrogen atom of an acylamide is directly bonded to a cationic nitrogen atom having one hydroxyethyl and two methyl substituents represent uniquely effective catalysts for the trimerization of the isocyanate radical. These aminimides are especially useful as catalysts for the preparation of rigid polyisocyanate-polyisocyanurate foams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.