Polymerization catalyst for the preparation of poly(isocyanates)
US5328977A · kind A · utility
0Cited by
4References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 12, 1993 |
| Grant date | Jul 12, 1994 |
| Priority date | — |
| Expiry date | Nov 12, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G69/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An improvement in the process of preparing nylon-1 by the polymerization of isocyanates is disclosed. Accordingly, the improvement comprising using in the process a catalyst conforming to EQU (X).sub.n Me(OR).sub.m where Me is titanium or zirconium, X is chlorine or bromine atom, R is an aliphatic radical having 1 to 20 carbon atoms and where the sum of m=n is 4 with the proviso that where Me is titanium n is 1 or 2, and where Me is zirconium n is 1-4.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.