Pressureless pipe comprising a multimodal polyethylene...

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 23/04 (2006.01) C08K 3/00 (2006.01) C08L 23/08 (2006.01)

Patent

CA 2618810

The present invention relates to a pipe or a supplementary pipe article comprising a polyethylene composition comprising a base resin which comprises (A) a first ethylene homo- or copolymer fraction, and (B) a second ethylene homo- or copolymer fraction, wherein fraction (A) has a lower average molecular weight than fraction (B), the base resin has a flexural modulus determined according to ISO 178 of 1000 MPa or higher, and the composition further comprises (C) an inorganic mineral filler, wherein inorganic mineral filler (C) is present in the composition in an amount of 1 to 70 wt.%, and to the use of said composition for the production of a pipe or a supplementary pipe article.

La présente invention concerne un tuyau ou un article de tuyau complémentaire comprenant une composition de polyéthylène renfermant une résine de base qui comprend (A) une première fraction homo- ou copolymère d'éthylène et (B) une deuxième fraction homo- ou copolymère d'éthylène, la fraction (A) présentant un poids moléculaire moyen inférieur à celui de la fraction (B), laquelle résine de base présente un module d'élasticité en flexion, déterminé selon la norme ISO 178, égal ou supérieur à 1000 MPa. La composition comprend également (C) une charge minérale inorganique, la charge minérale inorganique (C) étant présente dans la composition en une quantité comprise entre 1 et 70 % en poids. Cette invention concerne également l'utilisation de cette composition pour produire un tuyau ou un article de tuyau complémentaire.

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