Patent ID: 6380313
Filing Date: 2002-04-30
Classification: C08F,C08L

Abstract:
A processing additive composition for improving the melt processability of a melt processable host polymer, the additive composition comprising a fluoropolymer of interpolymerized units derived from a monomer composition of(i) from 0.1 to 10 percent by weight of a perfluoro vinyl ether having the formula CF2&boxH;CFâ€”(OCF2CF(CF3))AORf where A has a value of from 0 to 3 and Rf is a fluoroaliphatic group having from 1 to 8 carbon atoms; (ii) from 60-99.9 percent by weight of a fluorinated olefinic monomer having the formula RCF&boxH;CR2 (II) where R is H, F, Cl, alkyl of from 1 to 8 carbon atoms, or perfluoroalkyl of from 1 to 8 carbon atoms; and (iii) from 0 to 30 percent by weight of a nonfluorinated olefinic monomer having the formula CH2&boxH;CRâ€²2 wherein Râ€² is selected from H, Cl or an aliphatic group having from 1 to 8 carbon atoms; provided that when the monomer composition is free from the non-fluorinated monomer, the monomer composition comprises from 0.1 to 10 percent by weight of the perfluorovinyl ether monomer and from 90 to 99.9 percent by weight of at least two different fluorinated olefinic monomers.