Fluoropolymer blend
AssigneeArkema Inc.
InventorsRamin Amin-Sanayei, Gregory S. O'Brien, Saeid Zerafati
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Abstract
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.
Claims9
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 copolymer (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 and wherein surfactants used in the polymerization of copolymer (B) consists of non-fluorinated surfactants, wherein the polymer in the dispersed discrete domains of copolymer (B) consists of vinylidene fluoride copolymers.
Dependencies are inferred from the claim text.