Process for the formation of urethane via transcarbamation
US6998364B2 · kind B2 · utility
1Cited by
24References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 11, 2001 |
| Grant date | Feb 14, 2006 |
| Priority date | — |
| Expiry date | Dec 5, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/71
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention concerns a novel catalyst for forming urethanes. Said catalyst is characterized by the general formula: MY3−q[Z]q, wherein: Z is the radical corresponding to the anion of a super acid whereof the Hamett constant is at least equal to 13 and advantageously more than 13, M representing a trivalent metal, preferably known for forming Lewis acids; Y is an anion or a monovalent anionic function; and q is an integer selected advantageously between 1 and 3, inclusively. The invention is applicable to paint.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.