Catalyst and process for producing isocyanate trimers
US5691440A · kind A · utility
42Cited by
18References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 5, 1995 |
| Grant date | Nov 25, 1997 |
| Priority date | — |
| Expiry date | Oct 5, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2231/341
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for preparing isocyanate adducts having a high proportion of monoisocyanurate using a quaternary ammonium carboxylate trimerization catalyst. Also claimed are specific carboxylate catalysts, together with a process for producing the catalysts. The catalysts are particularly useful for trimerizing hexamethylene diisocyanate and isophorone diisocyanate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.