Pvdf-based extrusion-aiding agent

C - Chemistry – Metallurgy – 08 – K

Patent

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Details

C08K 5/526 (2006.01) C08L 23/08 (2006.01) C08L 25/06 (2006.01) C08L 27/06 (2006.01) C08L 27/12 (2006.01) C08L 67/02 (2006.01)

Patent

CA 2649414

The invention concerns a composition comprising: at least one fluorinated polymer (A), at least one interfacing agent (B), at least one stabilizer (C) of formula (I), wherein: Ar1 and Ar2 represent an aryl group. The composition is used as an agent for extruding a thermoplastic polyolefin or resin. The invention also concerns an extruding method consisting in: (i) contacting in solid phase a composition as defined in any one of Claims 1 to 13 with a thermoplastic polyolefin or a thermoplastic resin; (ii) then extruding the mixture obtained in (i) in the form of a film, a tube, a profiled section or a hollow body.

L'invention est relative à une composition comprenant : ~ au moins un polymère fluoré (A), ~ au moins un agent d'interface (B), ~ au moins un stabilisant (C) de formule (I), dans laquelle Ar1 et Ar2 désignent un groupe aryle. La composition est utilisée comme agent d'extrusion d'une polyoléfine ou d'une résine thermoplastique. L'invention est aussi relative à un procédé d'extrusion consistant : (i) à mettre en contact à l'état solide une composition telle que définie à l'une quelconque des revendications 1 à 13 avec une polyoléfine ou une résine thermoplastique; (ii) puis à extruder le mélange obtenu en (i) sous forme de film, de tube, de profilé ou de corps creux.

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