Process for the production of polyurethane plastics
US4331778A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1979 |
| Grant date | May 25, 1982 |
| Priority date | — |
| Expiry date | Dec 10, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/1808
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a process for the production of polyurethane plastics by reacting compounds containing at least two isocyanate-reactive hydrogen atoms and having a molecular weight in the range of from 400 to 10,000, polyisocyanates and, optionally, chain extenders having a molecular weight of from 32 to 400, foam stabilizers, water and/or organic blowing agents in the presence of catalysts containing tertiary nitrogen. These catalysts are characterized in that mixtures of (a) one or more cross-linking catalysts corresponding to the following general formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 which may be the same or different, represent C.sub.1 -C.sub.5 -alkyl radicals, preferably CH.sub.3 -- or C.sub.2 H.sub.5 radicals, PA1 R' and R" represent hydrogen or the same or different C.sub.1 -C.sub.3 -alkyl radicals, preferably CH.sub.3 -- or C.sub.2 H.sub.5 -- radicals, and PA1 n represents an integer of from 1 to 10, preferably from 4 to 8, (b) blowing catalysts corresponding to the following general formula: ##STR2## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4, are as defined above and PA1 X represents oxygen or ##STR3## where R'" represents a …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.