Patent ID: 7025699
Filing Date: 2006-04-11
Classification: F16G

Abstract:
1. In an endless, positive drive power transmission belt having a peripheral pulley-engaging surface for use with a cooperating pulley wherein the endless positive drive transmission belt comprises: an elastomeric body portion having an outer longitudinal surface, an inner peripheral pulley-engaging longitudinal surface, a pair of laterally facing side surfaces extending therebetween, a plurality of spaced apart tensile members disposed in said elastomeric body portion, and a wear-resistant fabric material disnosed on said inner peripheral pulley-engaging longitudinal surface; the improvement comprising a layer of a high ethylene-containing elastomer composition comprising a high ethylene-containing elastomer having at least 50% by weight ethylene bonded to said inner peripheral pulley-engaging surface of said wear-resistant fabric material, wherein said high ethylene-containing elastomer is selected from the group consisting of EPDM, ethylene-propylene, ethylene-butene, ethylene-pentene, ethylene-hexene, ethylene-heptene and ethylene-octene, wherein said high ethylene-containing elastomer composition comprises about 100 phr of said high ethylene-olefinic elastomer; 0 to about 90 phr carbon in the form of conductive carbon black and/or graphite; 0 to about 50 pbr silica; 0 to about 50 phr of a plasticizer selected from the group consisting of naphtbenic oil and parafilnic oil; 0 to about 8 phr of an organic peroxide selected from the group consisting of di-t-butyl peroxide, beuzoyl peroxide, dicumyl peroxide, 2,5-dimethyl-2,5-di(t-butylperoxy) hexane, 2,5-dicumyl-2,5-di)t-butylperoxy)hexyne-3, 1,1bis(t-butylperoxyne-3 and t-butylperoxybenzoate; 0 to 20 phr of a co-agent selected from the group consisting of N,N′-m-phenylene dimaleimide, triallyl trimallitate, triallyl cyanurate, dialylphthalate, metal acrylate, metal diacrylate and mixtures thereof; 0 to about 5 phr sulfur; and 0 to about 5 phr of an accelerator selected from the group consisting of thiuram, sulfonamide, dithiocarbamate, 2-mercaptobenzothiazol, dibenzotbiazyl disultide, or a mixture thereof.