Fluorosulphonated nitrile crosslinkable elastomers based on vinylidene fluorine with low TG and methods for preparing same
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United States of America Patent
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app pub date -
Oct 20, 2008
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Dec 20, 2000
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Abstract
Monomers corresponding to the formula Z.sub.2C.dbd.CWX(CY.sub.2).sub.nCN, in which X represents an atom of oxygen or another atom, Z and Y represent an atom of hydrogen or fluorine, W represents an atom of hydrogen or fluorine or a CF.sub.3 group and n is a natural integer between 0 and 10 inclusively. Because of the novel methods of copolymerization and crosslinking, these monomers make it possible to produce fluorosulphonated nitrile elastomers having very low glass transition temperatures (T.sub.g).
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