Polyfluorinated diisocyanates and fluorinated polyurethanes prepared therefrom
US4942164A · kind A · utility
7Cited by
1References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 8, 1989 |
| Grant date | Jul 17, 1990 |
| Priority date | — |
| Expiry date | May 8, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/773
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Polyfluorinated diisocyanates having the formula OCN--CH.sub.2 CH.sub.2 --(CF.sub.2).sub.n --CH.sub.2 CH.sub.2 --NCO, in which n is a whole number from 2 to 16, inclusive, and their analogous monofunctional isocyanates having the formula F(CF.sub.2).sub.n --CH.sub.2 CH.sub.2 --NCO, wherein n is a whole number from 1 to 20, inclusive. The polyfluorinated diisocyanates react with polyfluorinated diols having the formula HO--CH.sub.2 CH.sub.2 --(CF.sub.2).sub.n --CH.sub.2 CH.sub.2 --OH, wherein n is a whole number of from 1 to 20, inclusive, to form useful fluorinated polyurethanes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.