Expandable styrene polymers

Details Expandable styrene polymers Expandable styrene polymers

C - Chemistry, Metallurgy

08

J

C08J 9/16 (2006.01) C08J 9/18 (2006.01)

Patent

CA 2148992

The invention relates to expandable styrene polymers for elastic polystyrene foams, comprising a) from 50 to 90 % by weight of polystyrene and/or a styrene copolymer containing at least 50 % by weight of copolymerized styrene, b) from 5 to 30 % by weight of at least one styrene-soluble elastomer, c) from 5 to 20 % by weight of at least one block copolymer con- taining styrene as one component, d) from 1 to 15 % by weight, based on the sum of a), b) and c), of a low-boiling blowing agent, and, if desired, e ) conventional additives in effective amounts, where, in the unfoamed polystyrene beads, component b) is in the form of cell particles and component c) is in the form of par- ticles having a mean size of from 0.2 to 2 µm in the polystyrene phase, and to foams and foam moldings produced therefrom.

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