Curable laminated article of epdm elastomer and...

Details Curable laminated article of epdm elastomer and... Curable laminated article of epdm elastomer and...

B - Operations, Transporting

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B

154/140

B32B 27/08 (2006.01) B32B 25/16 (2006.01) B32B 27/26 (2006.01) B32B 27/32 (2006.01) C08L 23/16 (2006.01) E04D 5/10 (2006.01)

Patent

CA 2037233

TITLE Curable Laminated Article of EPDM Elastomer and Ethylene-Containing Polymer ABSTRACT OF THE DISCLOSURE A curable laminated article, useful for roofing application, comprising at least two layers, each layer comprising A blend of (a) 50-80% by weight of an ethylene/propylene/nonconjugated diene elastomer and (b) 20-50% by weight of an ethylene-containing polymer selected from the group consisting of polyethylene, an ethylene alpha-monoolefin copolymer wherein the monoolefin contains from 3-12 carbon atoms and is present in amounts of 2-8% by weight, and as ethylene/vinyl acetate copolymer having a vinyl acetate content up to about 10% by weight, and wherein each alternate layer contains either elemental sulfur as the crosslinking agent for the elastomer or a cure accelerator so that the elastomer in the laminated article subsequently cures when elemental sulfur and the accelerator in each layer migrate to an adjacent layer when the laminate is exposed to elevated temperatures.

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