Cure system for sulfur vulcanizable rubber.

摘要

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 min -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 thiruam 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: <CHEM> wherein R<1>, R<2>, and R<3> are independently alkyl radicals having 8 to 10 carbon atoms and M is selected from the group consisting of Cl, Br, CH3SO4 and HSO4.