C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/3018
C08L 75/04 (2006.01) C08L 77/00 (2006.01)
Patent
CA 2036157
This invention involves a process for extrusion processing of thermoplastic polyurethane (TPU) based compositions, characterized by the addition of 5 to 45% by weight of one or several modifying agents in relation to the TPU, said modifying agent(s) being selected from among polyesteramide- or polyetheramide-based thermoplastic elastomers excluding styrene resins. These modifying agents improve such features as the processing parameters and rheological behaviour of TPU compositions when they are being worked.
La présente invention concerne un procédé de transformation par extrusion de compositions à base de polyuréthannes thermoplastiques (TPU), caractérisé en ce qu'on ajoute de 5 à 45% en poids d'un ou plusieurs agents modifiants par rapport au TPU, le ou lesdits agents modifiants étant choisis parmi les élastomères thermoplastiques à base de polyestéramides ou de polyétheramides à l'exclusion des résines styréniques. Ces agents modifiants améliorent notamment les paramètres de transformation ainsi que le comportement rhéologique des TPU lors de leur mise en oeuvre.
Alex Patrick
Piard Andre
Atochem
Robic
LandOfFree
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