Rigid polyurethane foams with low thermal conductivity and a process for their production
US8097660B2 · kind B2 · utility
1Cited by
6References
4Claims
0Family size
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Key dates
| Filing date | Aug 31, 2006 |
| Grant date | Jan 17, 2012 |
| Priority date | — |
| Expiry date | Jul 13, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2375/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Rigid closed-cell polyurethane foams with low k-factors are produced by reacting an organic polyisocyanate with an amine-based polyether polyol and a polyester polyol in the presence of a catalyst and a hydrofluorocarbon blowing agent, preferably, HFC-245fa. It is preferred that no water be added to the reaction mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.