Abstract: A novel tetrablock copolymer having the general configuration of A1-B1-A 2-B2 is claimed, where the A1 and A2 blocks are blocks of mono alkenyl arene and the B1 and B2 blocks are blocks of hydrogenated butadiene, having a 1,2-vinyl content of between 25% and 60%. The blocks have well defined molecular weight ranges, resulting in a polymer having a unique set of property advantages. Also disclosed and claimed are elastomeric compositions containing the linear hydrogenated block copolymer, a styrene polymer, an ethylene polymer and a tackifying resin. These elastomeric compositions have particular utility in injection molded parts and in extruded parts such as extruded films and fibers.

Abstract: Compositions consisting essentially of from 60% to 95% by weight of the polymer components of a high flow polypropylene and from 40% to 5% by weight of a polystyrene-hydrogenated polyisoprene-polystyrene-hydrogenated polyisoprene block copolymer have excellent low temperature impact strength and high heat distortion temperature for molding large automobile parts.

Abstract: Compositions comprising a polypropylene grafted with polystyrene and a selectively hydrogenated monoalkenyl aromatic/conjugated diene block copolymer have improved melt viscosity and toughness when the block copolymer component is designed to have weak monoalkenyl aromatic domains.

Abstract: Compositions comprising a polypropylene grafted with polystyrene and a selectively hydrogenated monoalkenyl aromatic/conjugated diene block copolymer have improved melt viscosity and toughness when the block copolymer component is designed to have weak monoalkenyl aromatic domains.

Abstract: The tensile properties of elastic polymer films which contain thermoplastic block copolymer compositions and ethylene/vinyl acetate copolymers are improved by replacing some of the ethylene/vinyl acetate with a polyolefin having low crystallinity. The increase in tensile strength occurs without significant loss of elasticity and is most significant when the polyolefin is an ultra-low density polyolefin.

Abstract: A composition is provided which is suitable for extrusion blowing to form an elastomeric film. The film produced from this composition has a very low modulus, high elongation and excellent elastic recovery. The composition includes: two hydrogenated block copolymers each including at least two blocks containing predominantly polymerized alkene arene monomer units and at least one block containing predominantly polymerized conjugated diene monomer units, the first hydrogenated block copolymer having a molecular weight between about 55,000 and about 200,000 and the second hydrogenated block copolymer having a molecular weight between about 15,000 and about 85,000, the ratio of the molecular weight of the first to the second being greater than 1.

Abstract: The properties of polymer films which contain thermoplastic block copolymer compositions and ethylene/vinyl acetate copolymers are improved by the addition of small amounts of polystyrene. Specific improvements have been made in elastically and tensile strength as well as in reduced die build-up during processing.

Abstract: A composition is provided which is suitable for extrusion blowing to form an elastomeric film. The film produced from this composition has a very low modulus, high elongation and excellent elastic recovery. The composition comprises: two hydrogenated block compolymers each comprising at least two blocks containing predominantly polymerized alkene arene monomer units and at least one block containing predominantly polymerized conjugated diene monomer units, the first hydrogenated block copolymer having a molecular weight between about 55,000 and about 200,000 and the second hydrogenated block copolymer having a molecular weight between about 15,000 and about 85,000, the ratio of the molecular weight of the first of the second being greater than 1.

Abstract: This invention relates to a resin composition comprising functionalized polypropylene, a hydrogenated mono alkylarene-conjugated diene block copolymer, oil, and a filler which can be blended to form a self-extinguishing, low smoke and halogen free insulation composition which exhibits high ultimate elongation and is relatively easy to process.

Abstract: This invention relates to a resin composition comprising polypropylene, a hydrogenated mono alkylarene-conjugated diene block copolymer, oil, and a filler which has been treated with a coupling agent, which can be blended to form a self-extinguishing, low smoke and halogen free insulation composition which exhibits high ultimate elongation and is relatively easy to process.

Abstract: This invention relates to a resin composition comprising polypropylene, a functionalized hydrogenated mono alkylarene-conjugated diene block copolymer, oil, and a treated Mg(OH).sub.2 filler which can be blended to form a self-extinguishing, low smoke and halogen free insulation composition which exhibits high stress at break and is relatively easy to process.

Abstract: This invention relates to a resin composition comprising polypropylene, a hydrogenated mono alkylarene-conjugated diene block copolymer, a functionalized low molecular weight polypropylene wax, oil, and a hydrated inorganic filler which can be blended to form a self-extinguishing, low smoke and halogen free insulation composition which exhibits high ultimate elongation and is relatively easy to process.

Abstract: This invention relates to a resin composition comprising functionalized polypropylene, functionalized low molecular weight polypropylene wax, a hydrogenated mono alkylene-conjugated diene block copolymer, oil, and a filler which can be blended to form a self-extinguishing, low smoke and halogen free insulation composition which exhibits high ultimate elongation and is relatively easy to process.

Abstract: Compositions consisting essentially of from 60% to 95% by weight of the polymer components of a high flow polypropylene and from 40% to 5% by weight of a polystyrene-hydrogenated polyisoprene-polystyrene block copolymer have excellent low temperature impact strength and high heat distortion temperature for molding large automobile parts.