Patent ID: 6489420
Filing Date: 2002-12-03
Classification: C08F,Y10T

Abstract:
A fluoropolymer comprising interpolymerized units of (i) greater than 33 to about 46 weight percent (wt %) tetrafluoroethylene, (ii) from about 15 to below about 30 wt % vinylidene fluoride, (iii) from about 20 to about 50 wt % at least one ethylenically unsaturated monomer of the formula CF2&boxH;CFRf where Rf is a perfluoroalkyl of 1 to 8 carbon atoms, and (iv) from about 0.1 to about 15 wt % a perfluorovinyl ether of the formula CF2&boxH;CFâ€”(OCF2CF(Rf))aORâ€²f where Rf is as described in (iii), Râ€²f is a perfluoroaliphatic of 1 to 8 carbon atoms and â€œaâ€  has a value of 0 to 3.