Polyfluorinated, branched-chain diols and diisocyanantes and fluorinated polyurethanes prepared therefrom
US5204441A · kind A · utility
11Cited by
3References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 12, 1990 |
| Grant date | Apr 20, 1993 |
| Priority date | — |
| Expiry date | Mar 12, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/773
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Branched-chain diols and a method of forming them by reacting 1,4-diiodoperfluorobutane and perfluoropropylene to obtain branched-chain diiodide adducts thereof, reacting the diiodide adducts with ethylene to obtain I--CH.sub.2 CH.sub.2 --R--CH.sub.2 CH.sub.2 --I, wherein R is a branched-chain perfluoroalkyl radical, and hydrolysing the iodo groups to alcohols to obtain HO--CH.sub.2 CH.sub.2 --R--CH.sub.2 CH.sub.2 --OH. These diols can be reacted with branched-chain diisocyanates to form polyurethanes of better processability and lower glass transition temperatures than polyurethanes prepared from linear fluorinated monomers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.