Blocked polyisocyanates with improved storage stability
US4518522A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 1983 |
| Grant date | May 21, 1985 |
| Priority date | — |
| Expiry date | Sep 19, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/2865
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention is directed to a process for improving the storage stability of a composition which contains PA0 (a) a blocked polyisocyanate prepared by blocking the isocyanate groups of an organic polyisocyanate with a blocking agent comprising a di-C.sub.1 -C.sub.12 -alkyl and/or -alkoxyalkyl malonate and PA0 (b) is free from compounds containing at least two isocyanate-reactive hydrogens, which comprises incorporating a stabilizing amount of a compound having monofunctional reactivity towards isocyanates into the composition. The present invention is also directed to the storage stable composition produced in accordance with the above process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.