Polymerization of lactam polyisocyanate having the isocyanate groups blocked with lactam
US4939234A · kind A · utility
3Cited by
4References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 10, 1989 |
| Grant date | Jul 3, 1990 |
| Priority date | — |
| Expiry date | Jan 10, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G69/40
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Process of preparing modified polyamides endowed with improved mechanical properties, which process resides in polymerizing an .omega.-lactam in the presence of PA1 (a) a polyisocyanate having the isocyanate groups blocked by an .omega.-lactam, PA1 (b) a poly-oxy-alkylene-amine, and PA1 (c) an alkali metal catalyst. A further object of the invention is the products obtained by means of such a process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.