Method for preparing an allophanate, allophanate, and low-viscosity composition containing the allophanate
US8716426B2 · kind B2 · utility
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3References
31Claims
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Key dates
| Filing date | Dec 8, 2009 |
| Grant date | May 6, 2014 |
| Priority date | — |
| Expiry date | Feb 18, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D175/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for the preparation of an allophanate of one or more identical or different isocyanates, compositions obtained by the process, and uses of the compositions are disclosed. The process comprises reacting an isocyanate with at least one monoalcohol comprising an ether or polyether functional group in the presence of a bismuth-comprising catalyst and a metal compound as co-catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.