Abstract: The present invention encompasses nontapered block copolymers of the following structure and adhesives containing themD--A--(B--A).sub.n --D.sub.xor(D--A--B).sub.z --Ywhere A is a vinyl aromatic hydrocarbon polymer block, B and D are hydrogenated conjugated diene polymer blocks wherein if the diene is butadiene, it must have a vinyl content of at least 30 percent by weight, n is an integer from 1 to 5, x is 0 or 1, z is an integer from 2 to 30, and Y is a multifunctional coupling agent and the copolymer has a vinyl aromatic hydrocarbon content of from 9 to 35 percent by weight. The ratio of the molecular weight of D to that of B ranges in accordance with the normalized molecular weight factor which may range from greater than 0 up to 180.times.10.sup.-6.

Abstract: Radial or star asymmetric block copolymer of the following formulae and improved adhesive and sealant compositions containing them(I) (A--HD).sub.x --Y--(UD).sub.z or (II) (UD--A--HD).sub.x --Y or (lII) ((UD).sub.y --A--HD).sub.x --Y --(UD).sub.xwherein A is a vinyl aromatic hydrocarbon block having a molecular weight of from 4000 to 20,000, HD is a hydrogenated conjugated diene block having a molecular weight of from 10,000 to 100,000, Y is a multifunctional coupling agent, UD is a partially hydrogenated conjugated diene block having a molecular weight of from 1000 to 80,000, x is an integer from 2 to 30, y is 0 or 1, z is an integer from 1 to 20, and x+z ranges from 3 to 30.

Abstract: The present invention encompasses nontapered block copolymers of the following structure and adhesives containing themD-A-(B-A).sub.n -D.sub.xor(D-A-B).sub.z -Ywhere A is a vinyl aromatic hydrocarbon polymer block, B and D are hydrogenated conjugated diene polymer blocks wherein if the diene is butadiene, it must have a vinyl content of at least 30 percent by weight, n is an integer from 1 to 5, x is 0 or 1, z is an integer from 2 to 30, and Y is a multifunctional coupling agent and the copolymer has a vinyl aromatic hydrocarbon content of from 9 to 35 percent by weight. The ratio of the molecular weight of D to that of B ranges in accordance with the normalized molecular weight factor which may range from greater than 0 up to 180.times.10.sup.-6.

Abstract: The present invention is a process for producing predominately four-armed asymmetric radial block copolymers which contain predominately, on average, two arms which are copolymers of at least one conjugated diene and at least one vinyl aromatic hydrocarbon and two conjugated diene homopolymer or copolymer arms, said process comprising:(a) anionically polymerizing at least one conjugated diene monomer and at least one vinylaromatic hydrocarbon monomer to form a set of living polymer arms,(b) anionically polymerizing at least one conjugated diene monomer to form another set of living polymer arms,(c) coupling the one set of living polymer arms with a coupling agent which is selected from the group consisting of tetramethoxysilane and .gamma.

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: Radial or star asymmetric block copolymer of the following formulae and an improved tape assembly using the copolymers and improved adhesive and sealant compositions containing them(I) (A--HD).sub.x --Y--(UD).sub.z or (II) (UD--A--HD).sub.x --Y or (lII) ((UD).sub.y --A--HD).sub.x --Y-(UD).sub.z wherein A is a vinyl aromatic hydrocarbon block having a molecular weight of from 4000 to 20,000, HD is a hydrogenated conjugated diene block having a molecular weight of from 10,000 to 100,000, Y is a multifunctional coupling agent, UD is a partially hydrogenated conjugated diene block having a molecular weight of from 1000 to 80,000, x is an integer from 2 to 30, y is 0 or 1, z is an integer from 1 to 20, and x+z ranges from 3 to 30.

Abstract: Radial or star asymmetric block copolymer of the following formulae and improved adhesive and sealant compositions containing them(I) (A--HD).sub.x --Y--(UD).sub.z or (II) (UD--A--HD).sub.x --Y or (III) ((UD).sub.y --A--HD).sub.x --Y--(UD).sub.zwherein A is a vinyl aromatic hydrocarbon block having a molecular weight of from 4000 to 20,000, HD is a hydrogenated conjugated diene block having a molecular weight of from 10,000 to 100,000, Y is a multifunctional coupling agent, UD is an unhydrogenated conjugated diene block having a molecular weight of from 1000 to 80,000, x is an integer from 2 to 20, y is 0 or 1, z is an integer from 1 to 10, and x+z ranges from 3 to 30.

Abstract: An extrudable elastomeric composition includes an elastomeric polymer and a tackifying resin in which the extrudable elastomeric composition is adapted to form an elastic sheet having a stress relaxation of less than about 30 percent. The elastomeric polymer is a styrene-poly(ethylene-propylene)-styrene thermoplastic elastomeric block copolymer or a mixture of styrene-poly(ethylene-propylene)-styrene and styrene-poly(ethylene-butylene)-styrene elastomeric block copolymers. The extrudable elastomeric composition may also include a polyolefin and/or an extending oil.

Abstract: An extrudable elastomeric composition includes an elastomeric polymer and a tackifying resin in which the extrudable elastomeric composition is adapted to form an elastic sheet having a stress relaxation or less than about 30 percent. The elastomeric polymer is a styrene-poly(ethylene-propylene)-styrene thermoplastic elastomeric block copolymer or a mixture of styrene-poly(ethylene-propylene)-styrene and styrene-poly(ethylene-butylene)-styrene elastomeric block copolymers. The extrudable elastomeric composition may also include a polyolefin and/or an extending oil.

Abstract: An adhesive composition comprising a plurality of selectively hydrogenated block copolymers, each of said block copolymers comprising at least one polymeric block containing predominantly monoalkenyl aromatic hydrocarbon monomer units and at least one polymeric block containing predominantly conjugated diolefin monomer units, at least one of which block copolymers is carboxylated and at least one of which block copolymers is not carboxylated and laminated structures comprising a plurality of polymeric layers tied together with said adhesive composition. The adhesive composition contains a relatively minor amount of carboxyl groups, on average, per polymer chain in the composition and is particularly useful in the preparation of laminated structures via coextrusion or similar processes, wherein the various layers are brought together in the molten phase while in motion, when one or more layers in the laminated structure comprises a polar group reactive with the carboxyl groups.

Abstract: Unit soles having a high abrasion resistance are molded from a polymeric composition comprising radial (AB)--.sub.x --BA monoalkenyl arene/conjugated diene block copolymers, syndiotactic-1,2-polybutadiene, a hydrocarbon extending oil, and a filter.

Abstract: An adhesive composition comprising a plurality of selectively hydrogenated block copolymers, each of said block copolymers comprising at least one polymeric block containing predominantly monoalkenyl aromatic hydrocarbon monomer units and at least one polymeric block containing predominantly conjugated diolefin monomer units, at least one of which block copolymers is carboxylated and at least one of which block copolymers is not carboxylated and laminated structures comprising a plurality of polymeric layers tied together with said adhesive composition. The adhesive composition contains a relatively minor amount of carboxyl groups, on average, per polymer chain in the composition and is particularly useful in the preparation of laminated structures via coextrusion or similar processes, wherein the various layers are brought together in the molten phase while in motion, when one or more layers in the laminated structure comprises a polar group reactive with the carboxyl groups.

Abstract: An elastic fiber or film prepared from a composition comprising at least one block copolymer containing at least two polymeric blocks containing predominantly monoalkenyl aromatic hydrocarbon monomer units having a weight-average molecular weight within the range from about 4,000 to about 50,000 and at least one polymeric block containing predominantly hydrogenated conjugated diolefin monomer units having a weight-average molecular weight within the range from about 10,000 to about 200,000, a relatively low molecular weight polymer selected from the Group consisting of anionic styrene homopolymers, .alpha.-methylstyrene homopolymers, hydrogenated styrene, copolymers of .alpha.-methylstyrene and styrene and mixtures thereof and may contain a wax. In particularly preferred embodiments, the elastic fiber or film will contain at least one A-B-A triblock copolymer and an A-B' diblock copolymer.

Abstract: Unit soles having a high abrasion resistance are molded from a polymeric composition comprising radial (AB)--.sub.x -BA monoalkenyl arene/conjugated driene block copolymers, syndiotactic-1,2-polybutadiene, a hydrocarbon extending oil, and a filler.

Abstract: A thermoplastic blend with the ability to absorb less than 40% of an oil, and having a superior tensile strength comprises about 80 to about 20 phr of an elastomeric block copolymer having the general configuration A-B-A, wherein the B block is a butadiene hydrocarbon block consisting of about 35 to about 55 mole percent of condensed butadiene units in the 1,2 configuration, and about 20 to about 80 phr of a block copolymer having the general configuration A-B-A, wherein the B block is a hydrogenated butadiene hydrocarbon block consisting of about 18 to about 34 mole percent of condensed butadiene units in the 1,2 configuration.

Abstract: A laminated structure comprising a plurality of polymeric layers at least two of said polymeric layers bonded together with an adhesive composition comprising a modified olefin polymer and at least one selectively hydrogenated block copolymer having at least one block which is predominantly a monoalkenyl aromatic hydrocarbon polymer block and at least one block which is a hydrogenated conjugated diolefin polymeric block. The adhesive composition used in the laminated structure significantly improves compatibility of the various polymeric layers thereby enabling the laminated structure or any excess thereof to be used in recycle as well as various molding applications.

Abstract: Unit soles having a smooth, dull appearance are molded from a polymeric composition comprising a radial (AB)--.sub.x BA monoalkenyl arene/conjugated diene block copolymers, syndiotactic-1,2-polybutadiene a polystyrene resin, a hydrocarbon extending oil, a blowing agent and a filler.

Abstract: The present invention provides a method for making a method for making high service temperature rubber compound, hot melt adhesive or sealant compositions by combining a polyphenylene ether resin with an elastomeric block copolymer of a vinyl aromatic hydrocarbon and a conjugated diene, which comprises (a) making a masterbatch of 2 to 50 phr of a polyphenylene ether having an intrinsic viscosity of 0.3 deciliters per gram or more and 100 phr of said block copolymer by extruding them together with 2 to 30 phr of an endblock compatible resin, and (b) optionally mixing the masterbatch with more of the block copolymer.

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.

Abstract: Adhesive and sealant compositions having improved resistance to a degradation which comprises: (a) a hydrogenated triblock, multiblock, radial, or star block copolymer of a vinyl aromatic hydrocarbon and a conjugated diene, (b) from 3 to 50 percent by weight of the total composition of a hydrogenated diblock copolymer of a vinyl aromatic hydrocarbon and a conjugated diene wherein the overall molecular weight of the diblock ranges from 8000 to 100,000, the molecular weight of the poly vinyl aromatic hydrocarbon block ranges from 4000 to 32,000, the molecular weight of the poly conjugated diene block ranges from 3000 to 90,000, and the vinyl aromatic hydrocarbon content ranges from 30 to 70 percent by weight of the diblock copolymer, and (c) 20 to 400 parts by weight per 100 parts by weight of total block copolymers of a tackifying resin.