Polyurethane compositions with improved storage stability
US4677180A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 1986 |
| Grant date | Jun 30, 1987 |
| Priority date | — |
| Expiry date | Jul 16, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/65
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention is directed to a process for improving the storage stability of a composition containing PA0 (a) a blocked polyisocyanate component 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) a high molecular weight component comprising a compound containing at least two isocyanate-reactive hydrogens, which comprises incorporating a stabilizing amount of a low molecular weight compound having at least 2 hydroxyl groups into the composition by adding said compound to compound (a), component (b) or to the mixture of compounds (a) and (b). 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.