Grafting of polymers with fluorocarbon compounds
AssigneeE. I. Du Pont de Nemours and Company
InventorsNeville Everton Drysdale, Lin Wang, Zhen Yu Yang
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Abstract
Fluorine containing terminal olefins may be grafted onto polymers containing hydrogen bound to carbon in the presence of free radicals. The olefins may also contain other functional groups. The resulting novel grafted polymers are useful as molding resins, for coating and as catalysts.
Claims11
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 H2C═CHCR1R2R6Y, and a source of free radicals, wherein:
- R1 and R2 are each independently fluorine or perfluoroalkyl containing 1 to 20 carbon atoms;
- R6 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;
- and
- Y is —SO2F, —CO2R3, —P(O)(OR3)2, —SO3H, —SO3M or —S(O)2NHS(O)R4;
- wherein:
- each R3 is independently hydrocarbyl or substituted hydrocarbyl containing 1 to 20 carbon atoms,
- R4 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.
A polymer, comprising, branches having the formula —CH2—CH2CR1R2R6Y, wherein:
- R1 and R2 are each independently fluorine or perfluoroalkyl containing 1 to 20 carbon atoms;
- R6 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;
- and
- Y is —SO2F, —CO2R3, —P(O)(OR3)2, SO3H, —SO3M or —S(O)2NHS(O2)R4;
- wherein:
- each R3 is independently hydrocarbyl or substituted hydrocarbyl containing 1 to 20 carbon atoms;
- R4 is perfluoroalkyl containing 1 to 20 carbon atoms;
- M is an alkali metal;
- and provided that a main chain of said polymer contains hydrogen bound to carbon.
Dependencies are inferred from the claim text.