Catalysts which stabilize hydrohalocarbon blowing agent in polyurethane foam formulations
US5688834A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 1991 |
| Grant date | Nov 18, 1997 |
| Priority date | — |
| Expiry date | Oct 15, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2375/04
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention relates to foam compositions which are expanded with hydrohalocarbon blowing agents in the presence of catalysts which result in a decreased amount of decomposition of the hydrohalocarbon blowing agents to haloalkenes during the polymerization. Thus, the present invention provides compositions comprising polyisocyanate, polyol, hydrohalocarbon blowing agent, surfactant, and at least one catalyst for polymerization of the polyisocyanate and polyol wherein the catalyst is less volatile than N,N-dimethylcyclohexylamine or the catalyst is a tertiary amine having at least one isocyanate-reactive functionality selected from the group consisting of --OH and --NH-- and the catalyst results in a decreased amount of decomposition of the hydrohalocarbon blowing agents to haloalkenes during polymerization of the polyisocyanate and the polyol and especially during use of the foam samples at a temperature of at least about 54.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.