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US 11,111,326 B2Granted
Highly fluorinated elastomers
Assignee3M Innovative Properties Company
InventorsKlaus Hintzer, Florian D. Jochum, Harald Kaspar, Kai H. Lochhaas, Tilman C. Zipplies
Life of this patent
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Abstract
Described herein is a peroxide curable, highly fluorinated elastomer derived from tetrafluoroethylene, a perfluoro ether monomer, and a compound selected from at least one of a highly fluorinated bisolefin ether and an iodine-containing perfluorinated ether.
Claims20
A curable composition comprising a curing system, wherein the curing system consists of a highly fluorinated polymer, a peroxide and coagent, and wherein the highly fluorinated polymer is derived from:
- (a) at least 50 mol % to no more than 65 mol % of tetrafluoroethylene monomer based on total moles of monomer incorporated;
- (b) more than 35 mol % to less than 50 mol % of perfluoro (methyl vinyl) ether;
- and
- (c) 0.01 to 1 mol % of Formula III based on total moles of monomer incorporated where Formula (III) is:
- CF2═CF—(CF2)g—(O—CF(CF3)—CF2)h—O—(CF2)i—(O)j—(CF2)k—CF(I)—X (III)
- wherein X is selected from F or CF3;
- g is 0;
- h is 0 i is an integer selected from 1-5;
- j is an integer selected from 0 or 1;
- and k is an integer selected from 0-6, wherein at least 95% of the C—H bonds in the backbone of the highly fluorinated polymer are replaced by C—F or C—I bonds.
7 more elements
Dependencies are inferred from the claim text.