Patent ID: 6660798
Filing Date: 2003-12-09
Classification: C08L,C09D,D06M

Abstract:
Fluoropolymer dispersion mixtures comprising:a) one or more dispersions comprising tetrafluoroethylene (TFE) homopolymers or copolymers with one or more monomers containing at least one ethylene unsaturation in amounts from 0 to 8% by weight and having an average particle size range from 180 to 400 nm; b) one or more tetrafluoroethylene (TFE) copolymer dispersions with one or more monomers containing at least one ethylene unsaturation, the comonomer amount being such that the dispersions contain a number of fibrils lower than &lE;1 0% of the total number of particles, said fibrils being polymer particles with a length/diameter (UD) ratio higher than 5; dispersions having an average particle size smaller than about 90 nm; wherein the component b) contains a comonomer amount such that the resulting polymer is not elastomeric and the composition and viscosity characteristics of the melt are not thermoprocessable, and wherein the ratio between the particle sizes of the dispersions of b) compared with that of the dispersions of a) is lower than 0.3.