Making cross-linked styrene polymer foam

B - Operations – Transporting – 29 – C

Patent

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400/1000, 402/15

B29C 67/22 (1985.01)

Patent

CA 1211247

ABSTRACT OF THE DISCLOSURE High quality plastic foam and the like expanded products and articles are made by incorporating a blowing agent in an acid-containing alkenyl aromatic polymer, such an a copolymer of styrene and acrylic acid; extruding while cross-linking the polymer with a polyfunctional cross-linking agent.

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