Multilayer polymer structure

B - Operations – Transporting – 32 – B

Patent

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Details

IPC codes

B32B 27/32 (2006.01) B32B 27/34 (2006.01)

Type

Patent

Patent number

CA 2649165

Description

Multilayer structure comprising at least one couple (L1-L2) of adjacent layers (L1) and (L2), wherein: layer (L1) comprises at least one polymer composition (C1) comprising: (i) at least one semi-aromatic polyamide, and (ii) at least one impact modifier (I1); layer (L2) comprises at least one polymer composition (C2) comprising: (i) at least one un-functionalized polyolefin (PO2); (ii) at least one functionalized polyolefin (FPO2), said functionalized polyolefin comprising functional groups chosen from carboxylic groups, their esters, their anhydrides and their salts Process for manufacturing said multilayer structure, which comprises co-extruding or co-blowmolding polymer compositions (C1) and (C2) so as to obtain couple (L1- L2) of adjacent layers (L1) and (L2). Shaped article comprising the invented multilayer structure and process for manufacturing the shaped article.

L'invention concerne une structure multicouche comprenant au moins une association (L1-L2) de deux couches adjacentes (L1) et (L2), caractérisée en ce que : la couche (L1) comprend au moins une composition de polymère (C1) comprenant (i) au moins un polyamide semi-aromatique et (ii) au moins un modificateur de la résistance aux chocs (I1); la couche (L2) comprend au moins une composition de polymère (C2) comprenant (i) au moins une polyoléfine non fonctionnalisée (PO2) et (ii) au moins une polyoléfine fonctionnalisée (FPO2), ladite polyoléfine fonctionnalisée comprenant des groupes fonctionnels choisis parmi des groupes carboxyliques, des esters de ceux-ci, des anhydrides de ceux-ci et des sels de ceux-ci. L'invention concerne également un procédé servant à fabriquer ladite structure multicouche, lequel consiste à co-extruder ou à co-mouler par extrusion-soufflage les compositions de polymère (C1) et (C2) de façon à obtenir une association (L1-L2) de deux couches adjacentes (L1) et (L2). L'invention concerne également un article profilé comprenant la structure multicouche de l'invention et un procédé servant à fabriquer l'article profilé.

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