Patent ID: 7531611
Filing Date: 2009-05-12
Classification: C08F,Y10T

Abstract:
1. A process for the copolymerization of a fine powder tetrafluoroethylene copolymer, said copolymer containing essentially from 99.70 mol % to 99.99 mol % tetrafluoroethylene monomer units and from 0.01 mol % to 0.30 mol % copolymerized comonomer units having the formula wherein 6≦n<10, said process comprising: said polymerized comonomer units are present in an amount from 0.01 mol % to 0.30 mol % based upon total copolymer composition, and said copolymer has a raw dispersion primary particle size (RDPS) less than 0.210 microns and has a standard specific gravity (SSG) of less than 2.143.