Process for producing modified, impact-resistant polyamides with lactam-blocked diisocyanate/monoisocyanate
US4940773A · kind A · utility
1Cited by
4References
20Claims
0Family size
Assignee
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Key dates
| Filing date | Jul 11, 1989 |
| Grant date | Jul 10, 1990 |
| Priority date | — |
| Expiry date | Jul 11, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/29
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for producing modified, impact-resistant polyamides showing an increased polymerization rate, which consists in polymerizing an .omega.-lactam in the presence of: PA1 (a) a mixture of an organic di-isocyanate and an organic mono-isocyanate, the isocyanate groups of both of which are blocked with an .omega.-lactam; PA1 (b) a poly-oxy-alkylene-amine having an aminic functionality lower than 3, and PA1 (c) an alkaline catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.