THERMOPLASTIC FLUOROPOLYMER COMPOSITION

摘要

The invention pertains to a multi-phase thermoplastic fluoropolymer composition, comprising a thermoplastic fluoropolymer and discrete domains of melt-processable perfluoropolymer, to the articles therefrom and to a process for manufacturing thermoplastic fluoropolymer compositions. The multi-phase thermoplastic fluoropolymer composition comprises :
- at least one thermoplastic fluoropolymer (A); and
- from 0.1 to 10 % by weight of (A) of at least one melt-processible perfluoropolymer (B),
and is characterized in that the polymer (B) is present in the composition in phase-separated domains in a continuous phase mainly comprising (A), at least 75 % by volume of said domains having maximal dimension not exceeding 1 µm. The process of the invention comprises mixing :
(i) a thermoplastic fluoropolymer (A);
(ii) a melt-processible perfluoropolymer (B) under the form of particles having an average primary particle size not exceeding 300 nm;
(iii) and optionally other additives or filling materials.