Antilumping expandable styrene polymers

Details Antilumping expandable styrene polymers Antilumping expandable styrene polymers

C - Chemistry, Metallurgy

08

K

403/76

C08K 3/34 (2006.01) C08J 9/22 (2006.01) C08J 9/224 (2006.01) C08L 25/06 (2006.01)

Patent

CA 1053400

ANTILUMPING EXPANDABLE STYRENE POLYMERS ABSTRACT OF THE DISCLOSURE Expandable styrene polymer particles are surface- coated with calcium polysilicate to prevent the particles from lumping together during expansion. The coating is applied by adding 0.02-0.05 part of calcium polysilicate to an aqueous suspension containing 100 parts of polymer particles subsequent to impregnating the mixture with a blowing agent, or by dry-blending polymer particles with the polysilicate. 1.

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