Patent ID: 8426509

Claim:
Thermoplastic fluoropolymer composition comprising: at least one thermoplastic partially fluorinated fluoropolymer having a melt flow index (MFI) of less than 10 g/10 min, as measured according to ASTM D-1238 under a piston load of 5 kg, polymer (A), said polymer (A) selected from the group consisting of: (A-1) TFE copolymers, CTFE copolymers, or both, with ethylene, propylene or isobutylene, with a molar ratio per(halo)fluoromonomer(s)/hydrogenated comonomer(s) of from 30:70 to 70:30, optionally containing one or more comonomers in amounts of from 0.1 to 30% by moles, based on the total amount of TFE, CTFE, or both, and hydrogenated comonomer(s), and (A-2) mixtures of 25% to 55% of by weight of polymer (A) of at least one VdF homopolymer and 45% to 75% by weight of polymer (A) of at least one VdF copolymer comprising from 0.1 to 15% by moles of a fluorinated comonomer selected from the group consisting of vinylfluoride (VF 1 ), chlorotrifluoroethylene (CTFE), hexafluoropropene (HFP), tetrafluoroethylene (TFE), trifluoroethylene (TrFE) and mixtures thereof; from 0.05 to 5% by weight of polymer (A) of at least one (per)fluoropolyether, polymer (B) and from 0.3 to 10% by weight of polymer (A) of at least one per(halo)fluoropolymer, polymer (C), wherein polymer (C) is a non-fibrillating PTFE having a number average molecular weight of below 1,000,000 or a melt-processible TFE copolymer comprising at least 2% wt and at most 30% wt of recurring units derived from at least one fluorinated comonomer selected from the group consisting of perfluoroalkylvinylethers of formula CF 2 ═CFOR f1′ , in which R f1′ is a C 1 -C 6 perfluoroalkyl, perfluoro-oxyalkylvinylethers of formula CF 2 ═CFOX 0 , in which X 0 is a C 1 -C 12 perfluorooxyalkyl having one or more ether groups, C 3 -C 8 perfluoroolefins, and mixtures thereof.