Butyl polymer composition having improved cold flow properties

C - Chemistry – Metallurgy – 08 – L

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C08L 23/28 (2006.01) C08L 25/08 (2006.01) C08L 91/00 (2006.01)

Patent

CA 2417266

A butyl polymer composition having improved cold flow properties is described. The composition comprises a butyl polymer (preferably a halogenated butyl polymer) and a styrene resin. The styrene resin is a copolymer of a- methylstyrene and another styrenic monomer (e.g., styrene and vinyl toluene). Relative to the base butyl polymer, the cold flow properties of the butyl polymer composition are improved along with a number of other properties.

L'invention porte sur une composition polymère butylique présentant de meilleures propriétés de d'écoulement à froid. La composition comprend un polymère butylique (de préférence un polymère butylique halogéné) et une résine styrénique. La résine styrénique est un copolymère de .alpha.-méthylstyrène et d'un autre monomère styrénique (tel que le styrène et le vinyle toluène). En ce qui concerne la base du polymère butylique, les propriétés de d'écoulement à froid de la composition précitée sont améliorées par un certain nombre d'autres propriétés.

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