Patent ID: 6191231
Filing Date: 2001-02-20
Classification: C08F,C09D

Abstract:
A process for producing a partially fluorinated polymer, comprising, contacting in the liquid phase a first polymer with contains hydrogen bound to carbon with a compound of the formula H.sub.2 C.dbd.CHCR.sup.1 R.sup.2 R.sup.6 Y, and a source of free radicals, wherein:R.sup.1 and R.sup.2 are each independently fluorine or perfluoroalkyl containing 1 to 20 carbon atoms;R.sup.6 is fluorinated alkylene containing 1 to 20 carbon atoms and optionally containing one or more ether groups or alkylene containing 1 to 20 carbon atoms and optionally containing one or more ether groups; andY is --SO.sub.2 F, --CO.sub.2 R.sup.3, --P(O)(OR.sup.3).sub.2, --SO.sub.3 H, --SO.sub.3 M or --S(O).sub.2 NHS(O)R.sup.4 ;wherein:each R.sup.3 is independently hydrocarbyl or substituted hydrocarbyl containing 1 to 20 carbon atoms,R.sup.4 is perfluoroalkyl containing 1 to 20 carbon atoms;M is an alkali metal;and provided that said contacting is carried out at a temperature at which said source of free radicals generates free radicals.