Crosslinked polymer foam sheet and process therefor

Details Crosslinked polymer foam sheet and process therefor Crosslinked polymer foam sheet and process therefor

C - Chemistry, Metallurgy

08

J

C08J 9/08 (2006.01) C08J 9/22 (2006.01)

Patent

CA 2586711

The invention provides a process for the production of a 5 crosslinked polymer foam, which comprises the following steps: (I) blending a polymer with a blowing agent, (II) forming the blend into a sheet, (III) crosslinking the sheet, and (IV) foaming the sheet, wherein the blowing agent is blended in an amount of 3 to 25 based on the total weight of the polyolefin and the blowing agent, and is composed of (A) 3 to 50 % of one or more inorganic carbonates and (B) 50 to 97 of one or more compounds selected from the group consisting of polycarboxylic acids, salts thereof, and derivatives thereof.

L'invention concerne un procédé permettant de produire une mousse polymère réticulée, qui consiste: I) à mélanger un polymère avec un agent gonflant, II) à former le mélange en une feuille, III) à réticuler cette feuille et IV) à mousser ladite feuille. L'agent gonflant est mélangé selon une quantité comprise entre 3 et 25 basée sur le poids total de la polyoléfine et de l'agent gonflant, et est composé: A) de 3 à 50 % d'un ou de plusieurs carbonate(s) inorganique(s) et B) de 50 à 97 d'un ou de plusieurs composé(s) sélectionné(s) dans le groupe constitué par des acides polycarboxyliques, et des sels et des dérivés de ceux-ci.

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