Polyether compounds and their preparation
US4877905A · kind A · utility
Inventor
Key dates
| Filing date | May 28, 1987 |
| Grant date | Oct 31, 1989 |
| Priority date | — |
| Expiry date | May 28, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/337
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Novel polyether intermediates having the general formula ##STR1## may be prepared by reaction of a fluoroalkene with a polyether of formula ##STR2## and may be fluorinated with elemental fluorine to yield novel perfluoropolyethers having the general formula ##STR3## In the above general formulae, the symbols R.sup.1 to R.sup.5 each represent the same or different substituted or unsubstituted hydrocarbon groups, the symbols R.sub.F.sup.1 to R.sub.F.sup.4 each represent the same or different fluorine-containing hydrocarbon groups with at least two carbon atoms and at least two fluorine atoms, or the combination R.sup.1 - R.sub.F.sup.1 and/or the combination R.sup.5 - R.sub.F.sup.4 represents a fluoroalkyl or fluoroalkenyl group, the symbols R.sup.6 to R.sup.14 each represents a fully fluorinated hydrocarbon group, x is an integer, each of y and z is zero or an integer, and the sum of x, y and z is from 2 to 100.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.