Abstract: The present invention is directed to a process for preparing a polymer modified bituminous binder composition in the substantial absence of crosslinking agents by heating a bitumen component in a stirred tank to a temperature from 185° C. to 221° C.; adding a block copolymer composition to the bitumen component while the bitumen component is being stirred to form a homogeneous mixture of the bitumen component and the block copolymer composition; and continuing to stir the homogeneous mixture while maintaining the temperature from 185° C. to 221° C. for a period of time from 4 hours to 30 hours thereby forming a cured polymer modified bituminous binder composition.

Abstract: Provided are a molding appearance modifier for resins capable of controlling appearance of large-sized molded parts only by small addition, and a polypropylene resin composition capable of providing good appearance to, for example, automobile exterior parts, and has excellent molding processability. The invention relates to a propylene block copolymer having a crystalline propylene polymer portion and a propylene•ethylene random copolymer portion, wherein the crystalline propylene polymer portion has an intrinsic viscosity [?]homo of 1.2 dl/g or less; the propylene•ethylene random copolymer portion has an ethylene content of 30 to 70 wt. %, has an intrinsic viscosity [?]copoly of 2.5 to 7.0 dl/g, and is added in an amount of 40 to 80 wt. % based on the whole propylene block copolymer; and the propylene block copolymer, in its entirety, has a melt flow rate of 0.1 to 10 g/10 min; and a [?]copoly/[?]homo ratio falls within a range of 2.

Abstract: High molecular weight coupled block copolymer composition comprising (a) a linear diblock copolymer (I) represented by the general formula (A-B), having a peak apparent molecular weight of from 200,000 to 300,000, (b) a linear di-armed block copolymer (II), represented by the general formula (A-B)2X, (c) a tri-armed block copolymer (III), represented by the formula (A-B)3X, (d) a more than tri-armed block copolymer (IV), represented by the formula (A-B)n>3X, (e) side polymeric structures (SPS) having a peak apparent molecular weight below the linear diblock copolymer (I), wherein A represents a block of predominantly poly(monovinyl aromatic hydrocarbon) and wherein the poly(monovinyl aromatic hydrocarbon) content is in the range of from 20 to 35 wt %; wherein B represents a block of predominantly poly(conjugated diene); wherein X is the residue of a trifunctional and/or tetrafunctional coupling agent; wherein the block copolymer composition has a weight average molecular weight Mw in the range of from 45

Abstract: A hot melt adhesive composition, comprising a blend of components including about 10% to about 40% by weight of an elastomeric block copolymer, preferably styrene-isoprene-styrene (SIS) or styrene-butadiene-styrene (SBS), about 15% to about 70% by weight of a first midblock tackifying resin having a softening point of at least about 110° C. and having an aromatic content of at least about 1.5% by weight; about 0 to 55% of second midblock tackifying resin, about 5% to about 35% by weight of a plasticizer; and about 0% to about 20% by weight of an end block resin having a softening point lower than 125° C.; wherein the components total 100% by weight of the composition, the viscosity of the composition is equal to or less than about 20,000 mPa·s at 120° C., and is applied at a temperature lower that 150° C. and initial bond retention of the composition on elastic strands is at least about 60%.

Abstract: The aqueous dispersion of the present invention is produced by incorporating a block copolymer (II) into an aqueous dispersion (I) of a block copolymer (I) in an aqueous solution containing a basic compound. The block copolymer (I) is composed of a polymer block (A) mainly constituted by a constitutional unit derived from an olefin monomer and a polymer block (B) constituted by a constitutional unit derived from a vinyl monomer (b1) having a carboxyl group, a carboxylic anhydride group or a sulfonic group and a constitutional unit derived from another vinyl monomer (b2) copolymerizable with the vinyl monomer (b1). The content of the basic component is 0.05 equiv or more of the carboxyl group, carboxylic anhydride group or sulfonic group, each contained in the unit derived from the vinyl monomer (b1).

Abstract: The present invention relates to novel compositions comprising (a) anionic block copolymers of mono alkenyl arenes and conjugated dienes, and (b) tailored softening modifiers have a particular polydispersity index that results in a surprising improvement in properties for the composition. Also included are processes for the manufacturing such novel compositions and various end-uses and applications for such compositions.

Abstract: The present invention provides a block copolymer composition and method of making the same having the structures (A2-B)n-X-(A1) or (A2-B2)n-X-(B1A1), where A1 and A2 are each a polymer block of a monoalkenyl arene and B, B1, and B2 are each a polymer block of one or more conjugated dienes or a hydrogenated diene polymer, n is an integer from 2 to 30 and X is the residue of a coupling agent.

Abstract: The invention relates to an adhesive composition comprising (i) one or more styrenic block copolymer compositions, (ii) a tackifier resin, and (iii) one or more plasticizers, wherein said styrenic block copolymer composition comprises: a. a tetra-branched block copolymer (IV) represented by the general formula (A-B)4X; b. a tri-branched block copolymer (III) represented by the general formula (A-B)3X; c. a di-branched block copolymer (II) represented by the general formula (A-B)2X; and d. a linear diblock copolymer (I) represented by the general formula A-B; where: i. A represents a polymer block of a mono alkenyl arene; ii. B represents a polymer block of a mixture of isoprene and 1,3-butadiene in a weight ratio of isoprene to butadiene from about 70:30 to about 40:60; iii. X represents the residue of a multi-functional coupling agent; iv. the weight percent of A blocks is from about 14% to about 22%; v.

Abstract: The present invention relates to novel compositions comprising (a) anionic block copolymers of mono alkenyl arenes and conjugated dienes where one of the blocks is a controlled distribution copolymer of a conjugated diene and mono alkenyl arene having a specific arrangement of the monomers in the copolymer block, and (b) tailored softening modifiers have a particular structure that results in a surprising improvement in properties for the composition. Also included are processes for the manufacturing such novel compositions and various end-uses and applications for such compositions.

Abstract: The present invention relates to novel compositions comprising (a) anionic block copolymers of mono alkenyl arenes and conjugated dienes where one of the blocks is a controlled distribution copolymer of a conjugated diene and mono alkenyl arene having a specific arrangement of the monomers in the copolymer block, and (b) tailored softening modifiers have a particular structure that results in a surprising improvement in properties for the composition. Also included are processes for the manufacturing such novel compositions and various end-uses and applications for such compositions.

Abstract: Styrenic block copolymers are blended with propylene copolymers to provide polymeric compositions with an improved balance between processability and elasticity. The compositions have improved processability by facilitating the ease with which a rubbery material, usually difficult to melt process, can be processed at high line speeds, which in turn improves the formation of the composition into films or other articles, assisted by a desired level of melt elasticity, i.e., a high elastic extension and recovery.

Abstract: Methods for modulated degenerative transfer living polymerization and isotactic-atactic stereoblock and stereogradient poly(olefins) thereby Abstract A method of producing a multiblock, stereoblock polyolefin having substantially uniform microstructure is disclosed. The method includes contacting a Ziegler-Natta pre-catalyst with a co-catalyst and an olefin to polymerize the olefin and form a first stereoblock, adding a methyl donator that changes the stereoregularity of the polymerization, and polymerizing the olefin to form a second stereoblock. The methods of the present invention allow for the production of poly(olefin)s having predictable degrees of incorporation of stereoerrors of a known type. The methods allows for the production of a variety of poly(olefin) microstructures, ranging from stereoblock to stereogradient poly(olefin)s and poly(olefin)s having fully isotactic to fully atactic microstructures.

Abstract: The present invention relates to adhesive compositions that comprise: i. at least one block copolymer (i)(a) of the formula A-I-A (1) or (A-I)nX (2) and at least one block copolymer (i)(b) of the formula A-(I-B)-A (3) or [A-(I/B)]n-X (4), wherein each A independently is a polymer block of an aromatic vinyl compound, I is a poly(isoprene) polymer block, (I/B) is a mixed random polymer block of isoprene and butadiene in a weight ratio I:B of from about 20:80 to about 80:20, n is an integer equal to or greater than 2 and X is the residue of a coupling agent, and wherein the weight ratio between said block copolymers (i)(a) and (i)(b) is such that the overall butadiene content in component (i) is less than 20 wt %, ii. a tackifying resin, and iii. optionally one or more plasticizers. Tapes, labels or bandages that are obtained by applying the adhesive compositions of the present invention to a carrier are also provided.

Abstract: The present invention relates to gels prepared from novel anionic block copolymers of aromatic vinyl compounds and conjugated dienes. The block copolymers include a high molecular weight linear and/or radial block copolymer component (SBC1 and/or SBC2), and a diblock component (E1). The block copolymer may be combined with tackifying resins, oils and other components to form the gels of the present invention.

Abstract: Adhesive compositions for styrene polymers are provided. The adhesives are suitable for use as tie-layers in multi-layer films and sheets and comprise a polyolefin base resin, a functionalized polyolefin and a combination of styrene triblock copolymers.

Abstract: A pressure-sensitive adhesive which develops a high bond strength to substrates of low surface energies, even at low temperatures. The adhesive is composed of a first block copolymer A-B and a second block copolymer which is composed of at least two and not more than eleven connected subunits A-B, A being in each case a polymer block comprising vinylaromatic monomer units and B being in each case a poly(1,3-diene). The first block copolymer is present in the adhesive in a fraction of at least 50% by weight, based on the total mass of the block copolymers in the adhesive. The adhesive additionally contains tackifier resins, of which at least 30% by weight are liquid at room temperature and which are miscible with the polymer blocks B, but not with the polymer blocks A. An adhesive tape with the pressure-sensitive adhesive is also described.

Abstract: Improved adhesives are provided through the use of styrenic radial block copolymers, containing at least 40 wt % diblock copolymers, the adhesives have improved adhesive properties and a reduced elastic behavior under die-cutting conditions. Compared to conventional linear block copolymers of similar molecular weight, radial copolymers offer higher holding power and lower melt viscosity for the adhesive. They therefore contribute to an improved balance between processability and end-use properties.

Abstract: A moldability modifier capable of improving molding processability, and a polypropylene resin composition using the same suitable for automobile exterior parts are provided. The invention relates to a moldability modifier comprising propylene block copolymer (A) containing from 80 to 98 wt % of a propylene homopolymer portion (A1) and from 2 to 20 wt % of a propylene/ethylene random copolymer portion (A2), wherein the MFR of (A1) is 300 g/10 min or more, the ethylene content of (A2) is from 10 to 70 wt %, the [?] of (A2) is 6.5 dl/g or more, and the MFR as a whole is 40 g/10 min or more; and propylene block copolymer (B) containing from 20 to 79 wt % of a propylene polymer portion (B1) and from 21 to 80 wt % of a propylene/ethylene random copolymer portion (B2), wherein the MFR of (B1) is 20 g/10 min or more, the ethylene content of (B2) is from 20 to 70 wt %, the [?] of (B2) is from 2.5 to 9.0 dl/g, and the MFR as a whole is from 0.1 to 50 g/10 min; and a polypropylene resin composition using the same.

Abstract: Provided are partially or fully neutralized mixtures of carboxylate functionalized ethylene high copolymers or terpolymers (Mw between 80,000 and 500,000 Da) with carboxylate functionalized ethylene low copolymers (Mw between 2,000 and 30,000 Da). The compositions are used in films, multilayer structures and other articles of manufacture. The compositions are preferably used on a surface of the articles.

Abstract: The present invention provides a production process of a heat shrinkable film which is transparent, excellent in the balance of physical properties such as rigidity, elongation and shrink properties in both MD and TD, especially has a uniform film thickness and good stability in extrusion molding film while utilizing an inflation method; a block copolymer or hydrogenated product thereof, or a composition composed thereof excellent in tensile properties, optical properties, hardness, stretch properties, molding processability, shrink properties and solvent resistance and therefore suited for extrusion, injection molding and foams. The production process of a heat shrinkable film has a first inflation step of forming a tube having a thickness of from 0.05 to 0.5 mm by using a block copolymer having a vinyl aromatic hydrocarbon content of from 65 to 95 wt. % and a conjugated diene content of from 5 to 35 wt.

Abstract: The present invention relates to an acrylic impact modifier having a multilayered structure, which offers both superior impact resistance and coloring characteristics to engineering plastics, such as polycarbonate (PC) and a polycarbonate/polybutylene terephthalate alloy resin, or to a polyvinyl chloride resin. The present invention provides an acrylic impact modifier having a multilayered structure comprising: a) a seed prepared by emulsion copolymerization of a vinylic monomer and a hydrophilic monomer; b) a rubbery core surrounding the seed and comprising a C2 to C8 alkyl acrylate polymer, and c) a shell surrounding the rubbery core and comprising a C1, to C4 alkyl methacrylate polymer, a method for preparing the same, and a thermoplastic resin comprising the same.

Abstract: A radial multi-block copolymer contains a tapered block as represented by the following formula 1. The radial multi-block copolymer, which includes a polystyrene block, a poly(isoprene-styrene)tapered block, a polyisoprene block, and a polybutadiene block, can be used as an excellent pressure-sensitive adhesive material. (pA-pT-pB)m-X-n(pC-pB-pT-pA)??Formula 1: where pA is the polyvinyl aromatic block; pT is the poly(isoprene-styrene)tapered block; pB is the polyisoprene block; pC is the polybutadiene block; X is the residue of a multi-functional coupling agent used in preparation of the radial multi-block copolymer; m and n are integers equal to or greater than 1, representing the number of branches associated with X; and pT=pTA+pTB, where pTA is the pA component of pT, and pTB is the pB component of pT.

Abstract: A blend comprising a) from 5 to 40% by weight of a linear block copolymer of vinylaromatic monomers and dienes of the structure (I) S1—(B/S)1—S2 having a flexible phase fraction (B/S)1 of not more than 55% by weight, based on the block copolymer (I) and b) from 95 to 60% by weight of a linear block copolymer of vinylaromatic monomers and dienes of the structure (II) S3—(B/S)2—S4 having a flexible phase fraction (B/S)2 of at least 65% by weight, based on the block copolymer (II), where S1 is a block of vinylaromatic monomers having a number average molar mass Mn in the range from 40 000 to 100 000 g/mol, S2, S3 and S4 are in each case blocks of vinylaromatic monomers having a number average molar mass Mn in the range from 5000 to 20 000 g/mol, (B/S)1 and (B/S)2 are in each case copolymer blocks of dienes and vinylaromatic monomers having a number average molar mass Mn in the range from 15 000 to 40 000 g/mol.

Abstract: [Problems] To provide a thermoplastic elastomer composition which can tightly adhere to a resin having a polar group without the need of using any adhesive and is excellent in water resistance, rubber properties and moldability, or to provide a composite molded article manufactured from the composition. [Means for Solving Problems] A thermoplastic elastomer composition comprising: (a) 100 parts by mass of a styrene block copolymer constituted by a [vinyl aromatic polymer block (A1)]-[hydrogenated conjugated diene polymer block (A2)]-[vinyl aromatic polymer block (A1)]; (b) 2 to 1000 parts by mass of an acrylic block copolymer having a methacrylic acid ester polymer block (B3) and an acrylic acid ester polymer block (B1); and (c) 2 to 200 parts by mass of a block copolymer containing a hydrophilic group; and a composite resin molded article manufactured by compositing the thermoplastic elastomer composition with a thermoplastic resin.

Abstract: A compound is described including one or more polymer (A) selected from propylene-ethylene block copolymers (A1), propylene homopolymers (A2) and a combination of copolymers (A1) and/or homopolymers (A2), at 30% to 90% by weight; one or more copolymer (B) selected from ethylene-alpha-olefin random copolymers (B1), hydrogenated styrene-ethylene-butadiene-styrene block copolymers (B2), ethylene-alpha-olefin block copolymers (B3), and a combination of two or more of copolymers (B1), copolymers (B2), and/or optional copolymers (B3), at 0% to 50% by weight; one or more mineral filler (C) at 0% to 30% by weight; one or more surface modifier (D) at 0% to 5% by weight; one or more additive (E) at 0% to 5% by weight; and one or more colorant (F) at 0% to 10% by weight. Associated articles and methods are also described.

Abstract: The present invention has its object to provide a resin composition for tubes excellent in balance among wear resistance, flexibility, gas permeation resistance and low resilience (pliability). The object is accomplished by a resin composition for tubes which comprises an isobutylene block copolymer (A) constituted of a polymer block (a) derived from isobutylene as the constituent and a polymer block (b) derived from a monomer component other than isobutylene, and a thermoplastic polyurethane resin (B).

Abstract: A curable epoxy resin composition including (a) a thermosettable epoxy resin; and (b) an amphiphilic block copolymer containing at least one epoxy resin miscible block segment and at least one epoxy resin immiscible block segment; wherein the immiscible block segment comprises at least one polyether structure provided that the polyether structure of said immiscible block segment contains at least one or more alkylene oxide monomer units having at least four carbon atoms, such that when the epoxy resin composition is cured, the toughness of the resulting cured epoxy resin composition is increased. The amphiphilic block copolymer is preferably an all polyether block copolymer such as a PEO-PBO diblock copolymer or a PEO-PBO-PEO triblock copolymer.

Abstract: An underfill formulation includes a solvent (110), a plurality of amphiphilic block copolymers (120) in the solvent, and an adhesion promoter (130) in the solvent. Groups of the plurality of amphiphilic block copolymers form a plurality of micelles (140) in the solvent, with the micelles including a core (141) and a shell (142) surrounding the core, and the adhesion promoter is in the core of at least some of the plurality of micelles.

Abstract: A shrink film comprising a polyethylene film, characterized in that said polyethylene is an ethylene copolymer mixture having a molecular weight distribution in the range 10 to 35, a density of 915 to 940 kg/m3, a weight average molecular weight of at least 100000 D and an MFR2.16 (190° C.) of 0.1 to 0.9 kg/m3, which copolymer mixture is produced by a two or more stage copolymerization of ethylene and 2 to 10% mole (relative to ethylene) of a C3-12 alpha-olefin comonomer in a series of reactors including at least one slurry loop reactor and at least one gas phase reactor using a heterogeneous Ziegler-Natta catalyst.

Abstract: A resin composition comprising (A) 70 to 98% by weight of a polyphenylene ether resin or a mixture of a polyphenylene ether resin and a polystyrene-based resin, (B) 1 to 15% by weight of a hydrogenated product of an aromatic vinyl-conjugate diene block copolymer having an aromatic vinyl content of 50 to 80% by weight, and (C) 1 to 15% by weight of a hydrogenated product of an aromatic vinyl-isoprene block copolymer having an aromatic vinyl content of 15 to 45% by weight is excellent in injection moldability (fluidability and productivity), heat resistance, impact resistance and chemical resistance, can provide a molded article excellent in appearance and rigidity even in a thin-walled portion, and can be suitably used for applications in which the molded article is used in contact with water or under conditions of high temperature and high humidity, particularly in a portion which comes into contact with an organic solvent contained in skin lotion or the like.

Abstract: A resin composition includes: a resin component comprising 50 to 100 parts by mass of (i-1) a polylactic acid and 50 to 0 part by mass of (i-2) a polyolefin [the total of (i-1) and (i-2) is 100 parts by mass], and 1 to 100 parts by mass, per 100 parts by mass of the resin component, of (ii) a functional group-containing, hydrogenated, diene-based polymer containing at least one kind of functional group selected from the group consisting of carboxyl group, acid anhydride group, epoxy group, (meth)acryl group, amino group, alkoxysilyl group, hydroxyl group, isocyanate group and oxazoline group; and a molded article thereof. The resin composition and the molded article are superior in balance between tensile property or stiffness and impact resistance as well as in appearance when molded and, moreover, have biodegradability (disintegratability); and, therefore, can be used in various applications such as packaging materials, industrial materials, industrial products, containers, medical tools and the like.

Abstract: The invention relates to a copolymer having a controlled structure, comprising at least two parts, part A and part B, said parts having different compositions, wherein part A is a hydrophilic or hydrophobic part, and part B is a part comprising units deriving from a monomer B having formula: CH2?CR1CO—[O—(CH2)p—]nOR2 or CH2?CR1CO—[O—CH2-a(CH3)a—CH2-b(CH3)b—]nOR2, wherein R1 is hydrogen or a methyl group, p, which is identical or different, is 2 or 3, a, which is identical or different, is 0 or 1, b, which is identical or different, is 0 or 1, a+b=0 or 1, p=2+a+b, n is an average number being greater than or equal to 1, and R2 is an alkyl group. The inventions also relates to the use of the copolymer or to compositions or formulations comprising the copolymer.

Abstract: A block copolymer mixture comprising block copolymers (A), (B) and (C) each block comprising vinyl aromatic hydrocarbon and conjugated diene monomer units: wherein block (A) comprises from 75 to 95 mass % of a vinyl aromatic hydrocarbon and from 5 to 25 mass % of a conjugated diene, and which has a block portion composed mainly of a vinyl aromatic hydrocarbon having a number average molecular weight of from 30,000 to less than 150,000: block (B) comprises from 50 to 80 mass % of a vinyl aromatic hydrocarbon and from 20 to 50 mass % of a conjugated diene, and which has a block portion composed mainly of a vinyl aromatic hydrocarbon having a number average molecular weight of from 20,000 to less than 120,000, and block (C) comprises from 60 to 95 mass % of a vinyl aromatic hydrocarbon and from 5 to 40 mass % of a conjugated diene, which has at least one random copolymer block portion comprising, as monomer units, from 55 to 95 mass % of a vinyl aromatic hydrocarbon and from 5 to 45 mass % of a conjugated die

Abstract: Mixtures comprising linear block copolymers composed of vinylaromatic monomers and dienes of the structure (I) S1-B1-S2 and (II) B2-S3, where S1 is a block composed of vinylaromatic monomers whose number-average molar mass Mn is in the range from 40 000 to 100 000 g/mol, each of S2 and S3 is a block composed of vinylaromatic monomers whose number-average molar mass Mn is in the range from 5000 to 20 000 g/mol, each of B1 and B2 is one or more blocks composed of dienes or is copolymer blocks composed of dienes and vinylaromatic monomers whose number-average molar mass Mn is in the range from 15 000 to 100 000 g/mol, and the ratio of block copolymers (I)/(II) is in the range from 0.5 to 10, and their use for impact-modification of blends using polystyrene.

Abstract: A hot melt adhesive composition, comprising a blend of components including about 1% to about 20% by weight of a styrene-ethylene-ethylene-propylene-styrene (SEEPS) random block copolymer; about 10% to about 70% by weight of a first midblock tackifying resin having a softening point of at least about 85° C.; about 0 to 65% of a second midblock tackifying resin; about 5% to about 60% by weight of a plasticizer; about 0% to about 20% by weight of an end block reinforcing resin having a softening point equal to or higher than 115° C.; and about 0.1% to about 5% of a stabilizer; wherein the components total 100% by weight of the composition, and the viscosity of the composition is equal to or less than about 20,000 mPa.s at 160° C. Laminates, especially those used in disposable soft goods, and methods of making such laminates using the hot melt adhesive composition are also described.

Abstract: Disclosed is the preparation of compositions which are blends of certain types of hydrogenated ethylene-dicyclopentadiene (E/DCPD) copolymers in combination with elastomeric polymers. An E/DCPD copolymer and an elastomeric polymer are co-dissolved in a common liquid reaction medium which is then subjected to hydrogenation conditions. These hydrogenation conditions serve to hydrogenate in-situ at least a portion of the residual double bonds of the E/DCPD copolymer component and possibly also eliminate any residual unsaturation which might be present in the elastomeric polymers. This combination of materials which has been hydrogenated in-situ can then be co-precipitated to form a polymer composition which can be molded into polyolefin materials of improved structural, thermal and mechanical properties with desirable impact resistance.

Abstract: Production of polymer blends using amphiphilic block copolymers which comprise poly-isobutene blocks and also polyoxyalkylene blocks, as compatibilizers.

Abstract: A propylene resin composition comprising (A) a crystalline propylene block copolymer in an amount of 89 to 30% by weight, which has a specific content of a 23° C. n-decane-soluble component, said soluble component having a specific intrinsic viscosity [?]a as measured in decalin at 135° C., has a specific melt flow rate (MFR, 230° C., load of 2160 g), and has a specific isotactic pentad fraction of a polypropylene homopolymer portion as measured by 13C-NMR, (B) a crystalline propylene block copolymer in an amount of 5 to 25% by weight, which has a specific content of a 23° C. n-decane-soluble component, said soluble component having a specific intrinsic viscosity [?]b as measured in decalin at 135° C., has a specific melt flow rate (MFR, 230° C., load of 2160 g), and has a specific isotactic pentad fraction of a polypropylene homopolymer portion as measured by 13C-NMR, (C) an elastomeric polymer in an amount of 1 to 20% by weight, which has a melt flow rate (MFR, 230C, load of 2160 g) of 0.

Abstract: A mixture which comprises a) from 5 to 50% by weight of a block copolymer A which comprises one or more oopolymer blocks (B/S)A each composed of from 65 to 95% by weight of vinylaromatic monomers and from 35 to 5% by weight of dienes and of a glass transtion temperature TgA in the range from 40° to 90° C. b) from 95 to 50% by weight of a block copolymer B which comprises at least one hard block S composed of vinylaromatic monomers and comprises one or more copolymer blocks (B/S)B each composed of from 20 to 60% by weight of vinylaromatic monomers and from 80 to 40% by weight of dienes and of a glass transition temperature TgB in the range from ?70° to 0°C. c) from 0 to 45% by weight of polystyrene or of a block copolymer C other than A and B, and d) from 0 to 6% by weight of a plasticizer, and its use for production of shrink films.

Abstract: A thermoplastic polyolefin alloy having high (notched) Izod impact strength and process for its preparation are disclosed. The alloys of this invention comprises of a polypropylene block copolymer as a base polymer, an elastomer, a compatibilizer and optionally a natural filler and is prepared by melt blending a twin-screw extruder (or Buss-co-kneader) the above ingredients. The polyolefin alloys of this invention exhibit very high (notched) Izod impact strength of 60 to 90 kg. cm/cm, flexural modulus of 6,000 to 8,000 kg/cm2, tensile strength at yield of 150 to 200 kg/cm2, and heat deflection temperature of 60 to 70° C. with 4.6 kgf stress. The alloys also possess melt flow index of 2-5 g/10 min. when tested according to ASTM D1238 and allow injection molding, compression molding, thermoforming and other conventional techniques to be applied for making end products that demand high impact strength.

Abstract: Disclosed is an elastomeric hydrogenated block copolymer capable of being directly extruded or molded with a minimum of additives and having both high elasticity and low permanent set. The hydrogenated block copolymers have high melt flows allowing for ease in processing the hydrogenation block copolymers in melt processes such as extrusion and molding.

Abstract: Disclosed is a polypropylene resin composition including from 50 to 93% by weight of polypropylene resin including propylene-ethylene block copolymer satisfying given requirements, from 1 to 25% by weight of ethylene-?-olefin copolymer rubber made up of ethylene units and units of C4-12 ?-olefin having a density of 0.850 to 0.870 g/cm3 and an MFR of 0.05 to 1 g/10 min, from 1 to 25% by weight of another type of ethylene-?-olefin copolymer rubber made up of ethylene units and units of C4-12 ?-olefin having a density of 0.850 to 0.870 g/cm2 and an MFR of 2 to 20 g/10 min, and from 5 to 25% by weight of inorganic filler. Molded articles made from the composition have good balance between rigidity and impact resistance and have good appearance.

Abstract: Polymer compositions having excellent physical properties, adhesion to metals and high temperature resistance consist essentially of 1) a polyolefin such as polypropylene, 2) a first ethylene copolymer selected from the group consisting of ethylene/vinyl acetate copolymers, ethylene/alkyl acrylate copolymers, and ethylene/alkyl methacrylate copolymers and 3) a second ethylene copolymer comprising copolymerized units of a) ethylene and b) a monomer selected from the group consisting of i) cyclic anhydrides of C4-C8 unsaturated acids, ii) C4-C8 unsaturated acids having at least two carboxylic acid groups, and iii) mono- and diesters of C4-C8 unsaturated acids having at least two carboxylic acid groups.

Abstract: Disclosed is a polyetherester thermoplastic elastomer resin composition with excellent Hex-elasticity and durability, which comprises 10 to 70% by weight of low hardness polyetherester block copolymer having shore-hardness not more than 40D, 55 to 15% by weight of high hardness polyetherester block copolymer having shore-hardness not less than 50D and 35 to 15% by weight of polybutylene terephthalate, and having flex-elasticity in the range of 2,500 to 4,600 kgf/cm2. The polyetherester thermoplastic elastomer resin composition of the present invention has excellent durability, processing workability, formability and scratch-resistance, as well as satisfactory flexibility and mechanical properties, especially, flex-elasticity. Additionally, the polyetherester thermoplastic elastomer resin composition of the present invention has advantages such as excellent deploying property and horn workability when it is employed in production of covers for air bags of automobiles.

Abstract: The invention provides an acrylate-based pressure-sensitive adhesive comprising a polymer blend having (a) at least a first component Kc which comprises a first acrylate block copolymer having at least two chemically distinguishable, covalently interlinked acrylate polymer blocks P, the at least two polymer blocks P independently of one another each being a homopolymer block of a first monomer or a copolymer block of a second monomer and a comonomer, and the first monomer of the homopolymer block and the second monomer of the copolymer block can be identical or different from one another, and the at least two polymer blocks P being present under application conditions in microphase-separated regions and each having a softening temperature of between ?125 and +20° C.

Abstract: The present invention relates to the use of poly acrylic and/or methacrylic macroinitiators in the free radical addition reaction of vinyl aromatic monomers to improve the properties of the resulting copolymer and/or composite. More particularly, the present invention relates to the production of poly acrylic and/or poly methacrylic macroinitiators having nitroxyl end groups. Using such macroinitiators in the free radical addition reaction of vinyl aromatics such as polystyrene compatibilizes the acrylic monomer in the vinyl aromatic matrix thereby improving the properties of the resulting polymer.

Abstract: The object of the present invention is to provide a thermoplastic elastomer composition having a good balance between the hardness and the mechanical strength, exhibiting superior rubber elasticity, high-temperature creep characteristics and formability in a wide range of temperature, and having oil resistance and heat resistance. The thermoplastic elastomer composition comprises (A) (meth)acrylic block copolymer; (B) a compound containing at least two amino groups in its molecule; and (C) a thermoplastic resin. The (meth)acrylic block copolymer (A) comprises (A1) a (meth)acrylic copolymer block and (A2) an acrylic copolymer block. A1 least one of the polymer blocks has at least one acid anhydride group. The (meth)acrylic block copolymer (A) and the compound (B) are dynamically vulcanized in the thermoplastic resin (C).

Abstract: Compositions including a thermoplastic elastomer or thermoplastic vulcanizate derived from a styrenic block copolymer having a reactive or crosslinkable hard block including aromatic vinyl repeat units and also preferably a crosslinkable soft block, and a non-olefin thermoplastic polymer or copolymer and preferably a compatibilizer such as the reaction product of a non-olefin thermoplastic polymer and a functionalized polymer such as a maleic anhydride functionalized styrenic block copolymer that is compatible with the styrenic block copolymer having a reactive or crosslinkable hard block, and optionally a linking compound. The vulcanizates are prepared by crosslinking the styrenic block copolymer in the presence of the non-olefin thermoplastic polymer and a suitable crosslinking agent, and optionally the compatibilizer, preferably utilizing dynamic vulcanization.

Abstract: A second order modified block copolymer which can be obtained by reacting a first order modified block copolymer with a second order modifier, wherein the first order modified block copolymer comprises a base block copolymer and a functional group-containing first order modifier group bonded to the base block co-polymer, wherein the base block copolymer comprises at least one polymer block comprised mainly of vinyl aromatic hydrocarbon monomer units and at least one polymer block comprised mainly of conjugated diene monomer units, and wherein the second order modifier has a specific functional group which is reactive to the functional group of the first order modifier group of the first order modified block copolymer. A second order modified block copolymer containing polymer composition comprising the second order modified block copolymer as well as a thermoplastic resin and/or a rubbery polymer.

Abstract: An object of the present invention is to provide a novel solid reagent capable of solving the problems of conventional solid reagents based on resin beads. The present invention relates to a solid reagent comprising an organic polymer base in which a polymer side chain is introduced onto the backbone of the organic polymer base via graft polymerization and a reactive functional group is introduced onto the polymer side chain. The organic polymer base is preferably in the form of a fiber, a woven or nonwoven fabric consisting of an assembly of fibers, a porous membrane or a hollow fiber membrane. The graft polymerization is preferably a radiation-induced graft polymerization. Solid reagents according to the present invention can be used in various organic synthetic reactions.