Patent ID: 7262248

Claim:
An article comprising: A. a tetrablock copolymer and B. at least one other polymer selected from the group consisting of: i) olefin polymers, and ii) styrene polymers, C. and optionally, one or more components selected from: i) tackifying resins, ii) polymer extending oils, and iii) engineering thermoplastic resins, wherein said tetrablock copolymer has the general formula: S1-B1-S2-B2 wherein S1, B1, S2, and B2 are polymer blocks, and a. B1 is a block of polymerized conjugated diene comprising at least 50 mole percent isoprene having an apparent molecular weight of from about 150,000 to about 400,000; b. S1 and S2 are blocks of polymerized monovinyl aromatic hydrocarbon having a weight average molecular weight of about 12,000 to about 40,000; c. B2 is a block of polymerized conjugated diene comprising at least 50 mole percent isoprene having an apparent molecular weight of from about 15,000 to about 60,000; and wherein; d. the weight ratio of B1 over B2 is from about 3.0 to about 12.0 and e. the content of polymerized monovinyl aromatic hydrocarbon is from 20 to about 35 weight percent; with the proviso that when olefin polymers are present, the article comprises 100 parts by weight of said tetrablock copolymer and from about 5 to about 300 parts by weight of at least one olefin polymer selected from the group consisting of ethylene homopolymers, ethylene/alpha olefin copolymers, propylene homopolymers, propylene/alpha olefin copolymers, high impact polypropylene, butylene homopolymers, butylene/alpha olefin copolymers, other alpha olefin copolymers or interpolymers ethylene/acrylic acid copolymers, ethylene/methacrylic acid ionomers, ethylene/vinyl alcohol copolymers, ethylene/cyclic olefin copolymers, propylene homopolymers and copolymers, propylene/syrene copolymers, ethylene/propylene copolymers, polybutylene, ethylene carbon monoxide interpolymers, and ethylene/vinyl acetate copolymers; and with the further proviso that when styrene polymers are present, the article comprises 100 parts by weight of said tetrablock copolymer and from about 5 to about 200 parts by weight of at least one styrene polymer selected from the group consisting of crystal polystyrene, high impact polystyrene, medium impact polystyrene, styrene/acrylonitrile copolymers, syndiotactic polystyrene, styrene/methyl-methacrylate copolymers, styrene/olefin copolymers selected from the group consisting of substantially random ethylene/styrene copolymers and styrene-grafted polypropylene polymers, and acrylonitrile/butadiene/styrene terpolymer.