Thermoplastic elastomer blends containing ethylene-propylene thermoplastic block copolymer elastomers

Claim 1

In a composition comprising a stabilized thermoplastic block copolymer elastomer having the general formula A-(B-A) x wherein A is a predominantly crystalline polypropylene block B is a predominately random ethylene-propylene copolymer block, and x is an integer from 1 to 15, the improvement wherein the composition further comprises from 10% to 35% of at least one compatible resin having a melt flow of at least 5 dg/min and is selected from the group consisting of homopolymers of propylene; copolymers of propylene with another alpha-olefin monomer; terpolymers of propylene with other alpha-olefin monomers; blends of propylene homopolymer; ethylene homopolymer, and random copolymers of propylene and ethylene; essentially completely hydrogenated polymers of styrene; essentially completely hydrogenated polymers of styrene derivatives; essentially completely hydrogenated copolymers of styrene and styrene derivatives; homopolymers of ethylene; and mixtures therof; and (b) from 0% to 15% of an incompatible resin having an aromatic character greater than 30%.