Soft propylene polymer blend with high melt strength

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 23/10 (2006.01) C08L 23/12 (2006.01)

Patent

CA 2334799

A polymer blend having a high melt strength and a low Young's modulus after irradiation of the polymers contains (1) a propylene homopolymer or copolymer having an isotactic index of greater than 90 and (2) a propylene homopolymer or copolymer having a crystallinity of < 24 % made using a metallocene catalyst. The blend can be used for extrusion coating (including fabric coating), foam extrusion, blow molding, and thermoforming applications.

L'invention concerne un mélange de polymères présentant une résistance élevée à la fusion et un faible module de Young après l'irradiation des polymères. Ce mélange contient (1) un homopolymère ou un copolymère de propylène présentant un indice isotactique supérieur à 90 et (2) un homopolymère ou un copolymère de propylène présentant un indice de cristallinité inférieur à 24 % obtenu au moyen d'un catalyseur métallocène. Ce mélange peut s'appliquer au revêtement par extrusion (y compris le revêtement de tissus), à l'extrusion de mousse, au moulage par soufflage et au thermoformage.

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