Flame retardant for hydrocarbon diene rubbers

Claim 1

A flame retarded elastomeric composition comprising: (a) a hydrocarbon conjugated diene elastomer wherein said diene elastomer consists of (1) at least one homopolymer of a hydrocarbon conjugated diene; (2) at least one copolymer of a hydrocarbon conjugated diene with at least one ethylenically unsaturated monomer selected from the group consisting of C 2 to C 12 hydrocarbon monomers, C 3 to C 8 carboxylic acids, esters of said acids with C 1 to C 8 alcohols, C 2 to C 8 halogen containing monomers and mixtures thereof; or mixtures of (1) and (2) (b) about 5 to about 100 parts by weight per 100 parts by weight of said elastomer of a halogen containing organic compound wherein said compound consists of (1) at least one non-polymeric aliphatic, aromatic or alicylic compound having a halogen content of about 35% to about 85% by weight based on the compound, (2) at least one polymeric compound selected from the group consisting of polychloroprene, chlorinated polyethylene, chlorosulfonated polyethylene, epichlorohydrin polymers and copolymers, chlorinated polyvinyl chloride and polyvinylidene chloride or (3) mixtures thereof; (c) about 10 to about 700 parts by weight per 100 parts by weight of said elastomer of alumina trihydrate; and (d) about 0.5 to about 100 parts by weight per 100 parts by weight of said elastomer of an iron oxide which is selected from a group consisting of anhydrous ferric oxide, hydrated ferric oxide, anhydrous ferrosoferric oxide, hydrated ferrosoferric oxide or mixtures thereof.