Molding expandable styrene polymer particles

Details Molding expandable styrene polymer particles Molding expandable styrene polymer particles

C - Chemistry, Metallurgy

08

J

403/72, 403/80

C08J 9/18 (2006.01) C08J 9/00 (2006.01)

Patent

CA 1085550

ABSTRACT OF THE DISCLOSURE Expandable styrene polymer particles having reduced flammability are made by incorporating from 0.1 to 15 weight per cent of non-polymeric organic halogen compounds into the polymer during impregnation of the polymer particles with a blowing agent in aqueous suspension. The addition of 0.001 to 0.5 weight per cent of dialkyl tin maleates or fumarates during the impregnation step produces expandable styrene polymer particles with greatly improved molding characteristics such as reduced pruning tendency, inceased mold fusion, and greater dimensional stability.

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