Catalytic partial cyclotrimerization of polyisocyanates and product thereof
US4697014A · kind A · utility
10Cited by
2References
14Claims
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Inventor
Key dates
| Filing date | Mar 25, 1986 |
| Grant date | Sep 29, 1987 |
| Priority date | — |
| Expiry date | Mar 25, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/902
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Storage-stable polyisocyanurate-polyisocyanates, essentially devoid of polyisocyanate monomer and dimer over time, are conveniently prepared by catalytically cyclotrimerizing an aliphatic, cycloaliphatic or aromatic polyisocyanate in the presence of a catalytically effective amount of an aminosilyl catalyst, and terminating the cyclotrimerization reaction when predetermined desired amount of isocyanurate group has been reached, by adding to the reaction mixture a reaction terminating amount of water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.