FLUOROPOLYMER BLEND

摘要

The present invention relates to the preparation of a thermoplastic fluoropolymer blend composition exhibiting improved mechanical properties upon fabrication. The fluoropolymer blend composite on is produced by blending an emulsion latex of fluoropolymer (A) with an emulsion latex of fluorinated copolymer (B). Copolymer (B) emulsion has a small particle size, super high MW, and a low degree of crystallinity. The blending of the latex emulsions results in a morphology with small particles of copolymer (B) uniformly distributed within a matrix of fluoropolymer (A) in a manner that could not be achieved by a mere melt blending of the tow components.

主权项

1. A fluoropolymer composite blend comprising:
a) 20 to 99 weight percent of a continuous fluoropolymer (A) phase; and b) 1 to 80 weight percent of uniformly dispersed discrete domains of fluorinated copolymer (B), wherein fluoropolymer (B) has a) a heat of fusion of 0 to 20 J/g or a modulus of less than 35,000 psi by ASTM D790, b) a high viscosity of greater than 25 kpoise by ASTM D3835 at 235° C. and 100−1 sec, and c) a small domain size of 20-1000 nm.