FIELD: chemistry.
SUBSTANCE: invention relates to an article made of extruded polymer foam and a method of producing an article from extruded polymer foam. Obtaining an extruded polymer foam using a thermoplastic polymer composition of styrene-acrylonitrile copolymer having copolymerised acrylonitrile comonomer content of 20 wt % or less, average acrylonitrile comonomer content greater than its median acrylonitrile comonomer content and average copolymerised acrylonitrile comonomer distribution having width at half-height greater than 2.5 wt % as measured at half-peak height of a copolymerised acrylonitrile comonomer distribution curve for the styrene-acrylonitrile copolymer.
EFFECT: invention enables to obtain a smooth surface when using an aqueous foaming agent.
10 cl, 1 tbl
