Foil or moulded body made of a thermoplastic material based...

C - Chemistry – Metallurgy – 08 – L

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C08L 53/00 (2006.01) C08L 23/08 (2006.01) C08L 23/16 (2006.01) C08L 53/02 (2006.01)

Patent

CA 2110502

A foil or moulded body made of a thermoplastic material based on at least one partially crystalline polyalkene elastomer and/or elastomer mixture is composed of a multiphase alkene block copolymer with a determined proportion of a heterophase elastomer copolymer of a homopolymer and/or copolymer of an alkene, as well as a polymer modifier. The plastic material con- tains if required stabilisers, fillers, parting agents, colorants and other usual additives. This foil or moulded body is characterised in that the thermoplastic material contains a multiphase polypropylene block copolymer with about 51 to 85 % by weight ethylene propylene copolymer, with respect to 100 parts by weight polypropylene block copolymer. The thermoplastic material represents a thermoplastic elastomer and from about 70 to 30 parts by weight polypropylene block copolymer, about 30 to 70 parts by weight are constituted by a polymer modifier represented by a homopolymer and/or copolymer of ethylene. These moulded bodies and foils are weather resistant. This foil has improved properties when it is shaped into moulded parts, such as in particular an im- proved pitting resistance.

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