Low acid organometallic catalyst for the production of flexible, semi-flexible and rigid polyurethane foams
US6825238B2 · kind B2 · utility
7Cited by
9References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 29, 2003 |
| Grant date | Nov 30, 2004 |
| Priority date | — |
| Expiry date | Jan 29, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2110/005
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to an improvement in flexible, semi-flexible and rigid foams formed by the catalytic reaction of an aromatic polyisocyanate, a polyol and a blowing agent and a process for preparing such polyisocyanate. The improvement resides in using an effective amount of a bismuth carboxylate or bismuth sulfonate having less than 34% free acid as the catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.