HIGHLY FLUORINATED ELASTOMERS

摘要

Described herein is a peroxide curable, highly fluorinated elastomer derived from (a) a fluorinated di-iodo ether compound of the following formula I: Rf—CF(I)—(CX2)n(CX2CXR)m—O—R″f-Ok—(CXR′CX2)p—(CX2)q—CF(I)—R′f wherein X is independently selected from F, H, and Cl; Rf and R′f are independently selected from F and a monovalent perfluoroalkane having 1-3 carbons; R is F, or a partially fluorinated or perfluorinated alkane comprising 1-3 carbons; R″f is a divalent fluoroalkylene having 1-5 carbons or a divalent fluorinated alkylene ether having 1-8 carbons and at least one ether linkage; k is 0 or 1; and n, m, and p are independently selected from an integer from 0-5, with the proviso that when k is 0, n+m is at least 1 and p+q is at least 1; and (b) a fluorinated monomer.

主权项

1. A composition comprising a highly fluorinated elastomer gum wherein the highly fluorinated elastomer gum is derived from
(a) a fluorinated di-iodo ether compound of the following formula I:
Rf—CF(I)—(CX2)n—(CX2CXR)m—O—R″f—Ok—(CXR′CX2)p—(CX2)q—CF(I)—R′f wherein
X is independently selected from F, H, and Cl;Rf and R′f are independently selected from F and a monovalent perfluoroalkane having 1-3 carbons;R is F, or a partially fluorinated or perfluorinated alkane comprising 1-3 carbons;R″f is a divalent fluoroalkylene having 1-5 carbons or a divalent fluorinated alkylene ether having 1-8 carbons and at least one ether linkage;k is 0 or 1; and n, m, and p are independently selected from an integer from 0-5, with the proviso that when k is 0, n+m is at least 1 and p+q is at least 1; and (b) a fluorinated monomer wherein the fluorinated monomer is are selected from at least one of vinylidene fluoride, tetrafluoroethylene, hexafluoropropylene, fluorinated allyl ethers, fluorinated vinyl ethers, and combinations thereof.