Pvc foam compositions

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C - Chemistry, Metallurgy

08

L

C08L 27/06 (2006.01) C08J 9/00 (2006.01) C08J 9/04 (2006.01) C08J 9/10 (2006.01) C08K 5/57 (2006.01)

Patent

CA 2227074

The density of rigid foamed articles made by the thermal decomposition of a blowing agent in a vinyl chloride polymer is reduced by the use of an organotin halide in combination with a mercaptocarboxylic acid ester or a sulfide of such ester or a mixture of the ester and the sulfide to activate the blowing agent.

La densité d'articles en mousse rigides résultant de la décomposition thermique d'un agent d'expansion dans un polymère de chlorure de vinyle est réduite par l'utilisation d'un haloïde organostannique combiné à un ester d'acide mercaptocarboxylique, à un sulfure de cet ester, ou encore à un mélange d'ester et de sulfure, pour activer l'agent d'expansion.

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