Polymer blend

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 23/02 (2006.01) B29C 44/00 (2006.01) C08J 3/24 (2006.01) C08J 9/00 (2006.01) C08L 23/04 (2006.01) C08L 23/08 (2006.01) C08L 23/10 (2006.01) C08L 23/16 (2006.01)

Patent

CA 2257365

The invention relates to polymer blends which can be used both in foamed and unfoamed states as a replacement for conventional EPDM and other elastomers. The composition of the blend includes a single-site catalyzed polyolefin resin having a density of below 0.878 g cm-3 and up to 40 weight percent a polyolefin including ethylene and propylene. The polymer blend is cross- linked. The polymer blends are formable and foamable. The use of sulfur to vulcanize the polymer blend is not necessary. The polymer blends can be used to make foam for floatation or for making gaskets.

Mélanges polymères pouvant être employés sous forme expansée ou non expansée, en remplacement des EPDM conventionnels et d'autre élastomères. Le mélange est composé d'une résine polyoléfine ayant subi une catalyse sur un seul site, d'une densité inférieure à 0,878 g/cm?-3¿ et, à raison d'une proportion pouvant aller jusqu'à 40 pour-cent en poids, d'une polyoléfine contenant de l'éthylène et du propylène. Ce mélange polymère est réticulé. Les mélanges polymères peuvent être façonnés et expansés. Ils ne nécessitent par de vulcanisation au soufre. Ces mélanges polymères peuvent servir à fabriquer des mousses de flottement ou des joints d'étanchéité.

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