Cure system for sulfur vulcanizable rubber

Details Cure system for sulfur vulcanizable rubber Cure system for sulfur vulcanizable rubber

C - Chemistry, Metallurgy

08

F

400/109, 6/129,

C08F 8/34 (2006.01) C08C 19/20 (2006.01) C08K 5/19 (2006.01)

Patent

CA 1271890

Abstract of the Disclosure CURE SYSTEM FOR SULFUR VULCANIZABLE RUBBER The present invention relates to a cure system for a sulfur vulcanizable rubber. The cure system comprises: (a) from about .50 to about 2.0 phr of a sulfenamide accelerator selected from the group consisting of N-oxydiethylene benzothiazole-2 sulfenamide, N-cyclohexyl-2-benzothiazole sulfenamide, N-t-butyl-2-benzothiazole sulfenamide and N-oxydiethylene-thiocarbamyl-N'-oxydiethylene sulfenamide; (b) from about .10 to about 1.0 phr of a guanidine accelerator selected from the group consisting of diphenyl guanidine and di-ortho-tolylguanidine; (c) from about .10 to about 1.0 phr of a thiuram accelerator selected from the group consisting of tetraethyl thiuramdisulfide, tetramethyl thiuram monosulfide, tetramethyl thiuramdisulfide; (d) from about .05 to about 1.0 phr of mercapto benzothiazyl disulfide; (e) from about .75 to about 3.0 phr of a sulfur vulcanizing agent; (f) from about .05 to about .50 phr of N-cyclohexylthio-phthalimide; (g) from about 1.0 to about 5.0 phr of a zinc compound selected from the group consisting of zinc oxide and zinc stearate and; (h) from about .05 to about 1.0 phr of an activator of the formula: Image M ? wherein R1, R2, and R3 are independently alkyl radicals having 8 to 10 carbon atoms and M is selected from the group consisting of C1, Br, CH3SO4 and HSO4.

609557

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