Patent ID: 6358171
Filing Date: 2002-03-19
Classification: B29D,B29L,F16G

Abstract:
A toothed power transmission belt adapted to engage a pulley, comprising a main belt body portion, a pulley contact portion integral with said body portion, tensile means disposed in said body portion, wherein at least one of said body portion and said pulley contact portion comprises an elastomeric composition comprising: 100 parts by weight of an at least partially hydrogenated nitrile group containing copolymer rubber; and from about 0.5 to about 50 parts per hundred weight of said copolymer of a fiber reinforcement; and characterized in that:i) said copolymer rubber comprises: a) from about 5 to about 40 percent of unsaturated nitrile monomer units; b) from about 1 to about 80 percent units of at least one monomer possessing the characteristic of lowering the glass transition temperature of said rubber; c) up to about 20 percent of conjugated diene monomer units; and d) the balance being hydrogenated conjugated diene monomer units; and ii) said belt possesses low temperature crack resistance to at least about âˆ’35Â° C.