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US 6,365,693 B1Granted
Fluoroalkanesulfonyl azide copolymers
AssigneeDuPont Dow Elastomers L.L.C.
InventorMing-Hong Hung
Life of this patent
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Abstract
Fluorinated olefins and fluorinated vinyl ethers, each having sulfonyl azide groups, are useful monomers in preparing fluoropolymers having functional side groups. Such functional side groups are useful in curing the fluoropolymers and also for enhancing the adhesion of the fluoropolymers to other substrates.
Claims9
A copolymer comprising:
- a) units derived from a fluoroalkanesulfonyl azide compound selected from the group consisting of those of the formula i) CF2═CF—(O)p—Rf—(CH2)n—S(O)qN3 wherein p=0 or 1;
- n=0-4;
- q=1 or 2;
- and Rf is a C1-C16 perfluoroalkyl or perfluoroalkoxy group, and those of formula ii) CX1X2═CX—(O)p—Rf—(CH2)n—S(O)qN3 wherein X, X1, X2 are independently H or F, with the proviso that X, X1, and X2 can not all be F;
- p=0 or 1;
- n=0-4;
- q=1 or 2;
- and Rf is a perfluoroalkyl or perfluoroalkoxy group;
- and
- b) units derived from at least one other fluorinated monomer.
7 more elements
Dependencies are inferred from the claim text.