Polypropylene compositions with a high content of heavy...

Details Polypropylene compositions with a high content of heavy... Polypropylene compositions with a high content of heavy...

C - Chemistry, Metallurgy

08

L

C08L 23/16 (2006.01) C08K 3/30 (2006.01) C08K 3/34 (2006.01) C08L 23/04 (2006.01) C08L 23/10 (2006.01) F16L 58/10 (2006.01)

Patent

CA 2274912

Polypropylene composition comprising by weight (A) 60-90 % of at least one heavy mineral filler having a specific weight greater than or equal to 3; (B) 0.1-4 % of a filler compatibilizer; and (C) 10-40 % of a heterophasic polyolefin composition containing rubber. Said composition has an MIL ranging from 0.5 to 10 g/10 min, elongation at break greater than 100 to 800 %, and flexural modulus ranging from 100 to less than 3000 MPa.

On décrit une composition de polypropylène contenant en poids: (A) de 60 à 90 % d'au moins une charge à base de minéral lourd d'un poids spécifique supérieur ou égal à 3; (B) de 0,1à 4 % d'un agent de compatibilité pour la charge; et (C) de 10 à 40 % d'une composition de polyoléfine hétérophasique contenant du caoutchouc . Cette composition se caractérise par un indice de fusion (MIL) compris entre 0,5 et 10 g/10 min, une élongation à la rupture supérieure à 100 et pouvant aller jusqu'à 800 % et un module d'élasticité en flexion compris entre 100 et moins de 3000 MPa .

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