Carbamylation compositions of monovalent metal containing catalysts, polyols and urea compounds and carbamylation processes using the same
US10457777B2 · kind B2 · utility
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Key dates
| Filing date | Sep 16, 2015 |
| Grant date | Oct 29, 2019 |
| Priority date | — |
| Expiry date | Feb 10, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L33/066
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides carbamylation compositions of one or more urea compounds, one or more polyols and a monovalent transition metal or alkali metal catalyst (i), such as lithium ethylhexanoate, which compositions are substantially isocyanate free, enjoy reduced toxicity in comparison to tin catalysts, and which are useful in making polycarbamates which themselves provide compositions for making crosslinked polyurethanes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.