Foaming agents
US6458862B1 · kind B1 · utility
2Cited by
0References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 9, 1999 |
| Grant date | Oct 1, 2002 |
| Priority date | — |
| Expiry date | Aug 9, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2375/04
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Hydrofluoropolyether foaming agents selected from:difluoromethoxy-bis(difluoromethyl ether) of formula HCF2OCF2OCF2H; and/or1-difluoromethoxy-1,1,2,2-tetrafluoroethyl difluoromethyl ether of formula HCF2OCF2CF2OCF2H, and their use in polyurethane foams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.