Composite of rubber and metal reinforcement therefor

A composite of rubber composition containing zinc oxide, carbon black, optionally and/or mineral fillers, cure accelerator(s), fatty acid and/or metal salt thereof, and containing filament reinforcement therefor, where said rubber composition is sulfur-cured with said reinforcement and where said reinforcement is selected from at least one of metal, organic and inorganic filaments, optionally a multiple of filaments cabled together to form a cord characterized in that said rubber composition contains (A) from about 0.1 to about 10 phr of at least one borate as the product of (i) a metal selected from Group IA, IIA, IIB, IVA, IVB and VIII of the Perodic Table of Elements, and (ii) an acid selected from boric, orthoboric, metaboric or polyboric acid, and (B) about 0.2 to about 5 phr of at least one monomer (cross-linkable) containing at least two --CH.dbd.CH.sub.2 units selected from at least one of triallyl phosphate, triallyl phosphite, triallyl trimellitate, diallyl phthalate, diallyl isophthalate, ethylene glycol dimethacrylate, trimethylol propane trimethacrylate, divinyl benzene, diallyl adipate, N,N'-diallyl lelamine, diallyl malonate, diallyl sebacate, diallyl suberate, diallyl succinate, diallyl terephthalate, triallyl borate, N,N',n"-triallyl citric triamide, N,N'-diallyl acrylamide, diallyl azelate, diallyl adipate, diallyl chlorendate, diallyl diglycolate, dialyl diglycol carbonate, diallyl dodecadioate, diallyl fumarae, diallyl glutarate, diallyl maleate and dialyl oxalate.