| CPC C08F 2/22 (2013.01) [C08F 14/185 (2013.01); C08J 3/24 (2013.01); C08L 27/12 (2013.01)] | 9 Claims |
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1. A method for producing a perfluoroelastomer, comprising carrying out polymerization of a perfluoromonomer in an aqueous medium in the presence of a polymer (1) to provide a perfluoroelastomer, the polymer (1) having a number average molecular weight of 0.3×104 or more and containing a polymerized unit (1) derived from a monomer represented by the following general formula (1):
CX2═CY(—CZ2—O—Rf-A) (1)
wherein X is the same or different and is —H or —F; Y is —H, —F, an alkyl group, or a fluorine-containing alkyl group; Z is the same or different and is —H, —F, an alkyl group, or a fluoroalkyl group; Rf is a fluorine-containing alkylene group having 1 to 40 carbon atoms or a fluorine-containing alkylene group having 2 to 100 carbon atoms and having an ether bond; and A is —COOM, —SO3M, —OSO3M, or —C(CF3)2OM, where M is —H, a metal atom, —NR74, imidazolium optionally having a substituent, pyridinium optionally having a substituent, or phosphonium optionally having a substituent and R7 is —H or an organic group, with the proviso that at least one of X, Y, and Z contains a fluorine atom,
wherein a content of the polymerized unit (1) in the polymer (1) is 90 mol % or more based on all polymerized units.
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