POLY(VINYLIDENE FLUORIDE)-BASED COMPOSITION Russian patent published in 2005 - IPC

FIELD: polymer materials.

SUBSTANCE: invention provides elastic and resilient composition containing (A) at least one homopolymer of vinylidene fluoride or copolymer of vinylidene fluoride with at least one other monomer capable of being copolymerized with vinylidene fluoride wherein proportion of this other monomer ranges between 0 and 30 wt parts per 100 wt parts vinylidene fluoride, (B) at least one fluorinated elastomer, which is copolymer of vinylidene fluoride and at least one other fluorinated monomer, and optionally (C) plasticizer. Composition is characterized by that, on the one side, it contains 0.5 to 10 wt parts B and 0 to 10 wt parts C per 100 wt parts A, provided that B+C = 0.5 tp 10.5 wt parts, and, on the other side, such vinylidene fluoride homopolymer or copolymer is chosen in such a way that it has coefficient of fluidity below 5 g/10 min, as measured according to standard ISO 1133 at 230°C under load 5 kg, and critical modulus G ranging between to 5and 22 kPa, as measured in intersection of shear moduli G' and G" in molten state at 190°C.

EFFECT: essentially increased stability of composition in air and in crude oil.

7 cl, 6 tbl, 12 ex