Premixes for the preparation of polyurethane or polyisocyanurate foams
US5889286A · kind A · utility
6Cited by
16References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 23, 1996 |
| Grant date | Mar 30, 1999 |
| Priority date | — |
| Expiry date | Sep 23, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/902
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Premixes intended for the preparation of polyurethane or polyisocyanurate foams comprising at least one polyol, at least one hydrofluoroalkane corresponding to the general formula CF.sub.3 --CR.sup.1 R.sup.2 --CF.sub.2 --R.sup.3, where R.sup.1 and R.sup.2 represent, independently, a hydrogen atom or an optionally fluorinated C.sub.1 -C.sub.3 alkyl group and where R.sup.3 represents a hydrogen atom or a methyl group, and at least one stabilizer chosen from nitroalkanes, diketones, alkaline-earth metal salts and brominated compounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.