Positive skew styrene-acrylonitrile copolymer foam

Details Positive skew styrene-acrylonitrile copolymer foam Positive skew styrene-acrylonitrile copolymer foam

C - Chemistry, Metallurgy

08

J

C08J 9/12 (2006.01) C08L 25/12 (2006.01)

Patent

CA 2721103

Prepare a polymeric foam from a foamable polymer composition containing a thermoplastic polymer composition and a blowing agent wherein 75 percent or more by weight of all non- halogenated polymers in the foamable polymer composition is a styrene-acrylonitrile copolymer composition having a polymerized acrylonitrile content distribution with a positive skew in a copolymerized AN content distribution and a positive percent difference between the mean and the median copolymerized AN content distribution.

L'invention porte sur la préparation d'une mousse polymère à partir d'une composition de polymère moussable contenant une composition de polymère thermoplastique et un agent gonflant, 75 pour cent ou plus en poids de tous les polymères non halogénés dans la composition de polymère moussable étant une composition de copolymère de styrène-acrylonitrile ayant une distribution de la teneur en acrylonitrile polymérisé avec une asymétrie positive dans une distribution de la teneur en AN copolymérisé et une différence de pourcentage positive entre les distributions de la teneur en AN copolymérisé moyenne et médiane.

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