Polynetwork epdm rubber

Details Polynetwork epdm rubber Polynetwork epdm rubber

C - Chemistry, Metallurgy

08

L

400/1120, 402/31

C08L 23/16 (2006.01) C08J 3/24 (2006.01) C08L 23/08 (2006.01) C08L 51/06 (2006.01)

Patent

CA 1250994

ABSTRACT OF THE DISCLOSURE This invention provides polynetwork rubber which rubber is a product of the polymerization of a mixture of ethylene, propylene and a lesser quantity of non- conjugated diene, the rubber containing both ionomeric cross-links and cross-links formed by the reaction of the rubber with sulfur or a sulfur donor, a methylol phenolic resin or an organic peroxide. The polynetwork rubber is useful in compositions in combination with oil and black, optionally in blends with high-diene hydrocarbon rubber such as natural rubber. The compositions are believed to have improved physical properties due to the presence of more than one type of network structure.

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