Method of producing rigid polyurethane foams
US5561172A · kind A · utility
9Cited by
4References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 12, 1994 |
| Grant date | Oct 1, 1996 |
| Priority date | — |
| Expiry date | Nov 12, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2375/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A primary object of the invention is to provide a method of producing rigid polyurethane foams using 1,1-dichloro-1-fluoroethane (HCFC-141b) as the blowing agent while substantially avoiding the formation of decomposition products from HCFC-141b. The above object can be achieved by a method of producing rigid polyurethane foams which comprises reacting a polyol with an organic polyisocyanate for foaming in the presence of HCFC-141b and a stabilizer therefor and in the presence of an organic metal catalyst and/or an imidazole compound catalyst and by the thus-produced rigid polyurethane foams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.