Abstract: There are provided a modified conjugated diene-based polymer having a good balance between the hysteresis loss properties and the wet skid resistance, practically sufficient abrasion resistance and fracture strength, and high processability when formed into a vulcanized product, and a modified conjugated diene-based polymer composition. A method for producing a modified conjugated diene-based polymer, comprising: a polymerization step of polymerizing a conjugated diene compound or copolymerizing a conjugated diene compound with an aromatic vinyl compound using an alkali metal compound or an alkaline earth metal compound as a polymerization initiator to obtain a conjugated diene-based polymer having a reactive end, and a modifying step of reacting a compound having a specific structure with the reactive end of the conjugated diene-based polymer.

Abstract: There are provided a resin composition including a polylactic acid which (i) includes a poly-L-lactic acid (component B-1) and a poly-D-lactic acid (component B-4), (ii) has a weight ratio of the component B-1 to the component B-4 (component B-1/component B-4) of 10/90 to 90/10, and (iii) shows a proportion of melt peaks at 195° C. or higher to all melt peaks in a temperature rising process in measurement by a differential scanning calorimeter (DSC) of at least 20%; a molded article of the resin composition; and methods for producing the resin composition and the molded article.

Abstract: There are provided a resin composition including a polylactic acid which (i) includes a poly-L-lactic acid (component B-1) and a poly-D-lactic acid (component B-4), (ii) has a weight ratio of the component B-1 to the component B-4 (component B-1/component B-4) of 10/90 to 90/10, and (iii) shows a proportion of melt peaks at 195° C. or higher to all melt peaks in a temperature rising process in measurement by a differential scanning calorimeter (DSC) of at least 20%; a molded article of the resin composition; and methods for producing the resin composition and the molded article.

Abstract: A method for producing a modified conjugated diene-based polymer having a good balance between the hysteresis loss properties and the wet skid resistance, practically sufficient abrasion resistance and breaking strength, and high processability when formed into a vulcanized product is provided. A method for producing a modified conjugated diene-based polymer, comprising: a polymerization step of polymerizing a conjugated diene compound, copolymerizing conjugated diene compounds, or copolymerizing a conjugated diene compound with an aromatic vinyl compound using an alkali metal compound or an alkaline earth metal compound as a polymerization initiator to obtain a conjugated diene-based polymer having an active end, and a modifying step of reacting a compound represented by following formula (1) with the active end of the conjugated diene-based copolymer.

Abstract: There are provided a modified conjugated diene-based polymer having a good balance between the hysteresis loss properties and the wet skid resistance, practically sufficient abrasion resistance and fracture strength, and high processability when formed into a vulcanized product, and a modified conjugated diene-based polymer composition. A method for producing a modified conjugated diene-based polymer, comprising: a polymerization step of polymerizing a conjugated diene compound or copolymerizing a conjugated diene compound with an aromatic vinyl compound using an alkali metal compound or an alkaline earth metal compound as a polymerization initiator to obtain a conjugated diene-based polymer having a reactive end, and a modifying step of reacting a compound having a specific structure with the reactive end of the conjugated diene-based polymer.

Abstract: An object of the present invention is to provide a fiber made of polylactic acid and having excellent strength, heat resistance and heat shrinkage resistance and a manufacturing method thereof. The present invention relates to the fiber is made of a composition which includes (i) poly(L-lactic acid) having a weight average molecular weight of 50,000 to 300,000 (component A), (ii) poly(D-lactic acid) having a weight average molecular weight of 50,000 to 300,000 (component B) and (iii) 0.01 to 5 parts by weight of a phosphate metal salt (component C) based on 100 parts by weight of the total of the components A and B and has a strength of 2.5 to 10 cN/dTex and a manufacturing method thereof.

Abstract: A primary modified polymer composed of (1) a hydrogenated polymer obtained by hydrogenating at least one non-hydrogenated polymer selected from the group consisting of polymers comprising conjugated diene monomer units and copolymers comprising conjugated diene monomer units and vinyl aromatic monomer units and (2) groups of a primary modifier having a functional group which are bonded to the polymer (1), which has a specific vinyl aromatic monomer unit content, a specific vinyl aromatic polymer block content, a specific weight-average molecular weight, and a specific degree of hydrogenation of the double bonds of conjugated diene monomer units; a secondary modified polymer obtained by reacting a primary modified polymer composed of (?) a base polymer and (?) groups of a primary modifier having a functional group which are bonded to the polymer (?) with a secondary modifier; and compositions comprising the primary or secondary modified polymer and at least one other component.

Abstract: It is an object of the present invention to provide a polylactic acid composition having excellent crystallinity, wet heat stability and melt stability. It is another object of the present invention to provide a molded article which is obtained from the polylactic acid composition and excellent in appearance and color. The present invention is a composition and molded article thereof which comprises a polylactic acid (component A), a carbodiimide compound (component B) and a phosphoric acid ester metal salt (component C).

Abstract: To provide a resin composition having high heat resistance with a high melting point and excellent melt stability and hydrolysis resistance, a molded article of the resin composition and a method of manufacturing the resin composition; the resin composition comprises an aromatic polyester (component A) having a butylene terephthalate skeleton as the main constituent unit and polylactic acid (component B) having a melting point of 190° C. or higher.

Abstract: It is an object of the present invention to provide a polylactic acid composition having excellent crystallinity, wet heat stability and melt stability. It is another object of the present invention to provide a molded article which is obtained from the polylactic acid composition and excellent in appearance and color. The present invention is a composition and molded article thereof which comprises a polylactic acid (component A), a carbodiimide compound (component B) and a phosphoric acid ester metal salt (component C).

Abstract: An object of the present invention is to provide a fiber made of polylactic acid and having excellent strength, heat resistance and heat shrinkage resistance and a manufacturing method thereof. The present invention relates to the fiber is made of a composition which comprises (i) poly(L-lactic acid) having a weight average molecular weight of 50,000 to 300,000 (component A), (ii) poly(D-lactic acid) having a weight average molecular weight of 50,000 to 300,000 (component B) and (iii) 0.01 to 5 parts by weight of a phosphate metal salt (component C) based on 100 parts by weight of the total of the components A and B and has a strength of 2.5 to 10 cN/dTex and a manufacturing method thereof.

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 copolymer, 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: 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 copolymer, 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 impact-resistant vinyl aromatic hydrocarbon resin, the hydrocarbon resin being produced by radical polymerization of 75 to 98 parts by mass of a vinyl aromatic hydrocarbon monomer (A-1) or a mixture of a vinyl aromatic hydrocarbon monomer and a monomer copolymerizable therewith (A-2) and 2 to 25 parts by mass of a modified block copolymer (B), wherein the component (B) comprises a base block copolymer (B-1) comprising conjugated diene monomer units and vinyl aromatic hydrocarbon monomer units and containing at least one polymer block of vinyl aromatic hydrocarbon monomer units (H), and a modifier group bonded thereto (B-2); and the component (B) has the following characteristics: (i) the content of the vinyl aromatic hydrocarbon monomer units is 12 to 50 mass %; (ii) the content of the polymer block (H) is 12 to 45 mass %; and (iii) the polymer block ratio (the mass % of the polymer block (H) based on the total mass of vinyl aromatic hydrocarbon monomer units contained in (B)) is more than 50 mass %.

Abstract: A primary modified polymer composed of (1) a hydrogenated polymer obtained by hydrogenating at least one non-hydrogenated polymer selected from the group consisting of polymers comprising conjugated diene monomer units and copolymers comprising conjugated diene monomer units and vinyl aromatic monomer units and (2) groups of a primary modifier having a functional group which are bonded to the polymer (1), which has a specific vinyl aromatic monomer unit content, a specific vinyl aromatic polymer block content, a specific weight-average molecular weight, and a specific degree of hydrogenation of the double bonds of conjugated diene monomer units; a secondary modified polymer obtained by reacting a primary modified polymer composed of (?) a base polymer and (?) groups of a primary modifier having a functional group which are bonded to the polymer (?) with a secondary modifier; and compositions comprising the primary or secondary modified polymer and at least one other component.

Abstract: An object of the present invention is to improve, in the raw material rubber compound particularly using a silica-based filler, which is used for tire tread, the balance between the rolling resistance and the skid resistance on a wet road surface and at the same time, improve the wear resistance is enhanced. The present invention provides an oil-extended polymer composition comprising 100 parts by weight of (A) a polymer having a number average molecular weight Mn of 500,000 to 700,000 and a content of a functional group-containing polymer component to be adsorbed to silica of 50 wt % or more, and from 20 to 60 parts by weight of (B) an extender oil.

Abstract: The present invention provides a molded article obtained from an aliphatic polyester resin composition comprising 60 to 99.9 parts by weight of at least one aliphatic polyester (A) and 0.1 to 40 parts by weight of at least one elastic polymer (B), provided that the total amount of the components (A) and (B) is 100 parts by weight, wherein the aliphatic polyester component in the molded article has an enthalpy of crystal fusion ?H determined using a differential scanning calorimeter of 5 J/g or more, the molded article has a continuous phase composed of the aliphatic polyester (A) and dispersed phases composed of the elastic polymer (B), and the distance T between the walls of the dispersed phases is less than 5.0 ?m.

Abstract: A first-order modified, hydrogenated polymer comprising (1) a hydrogenated polymer obtained by hydrogenating at least one unhydrogenated polymer selected from the group consisting of a polymer comprising conjugated diene monomer units and a copolymer comprising conjugated diene monomer units and vinyl aromatic hydrocarbon monomer units, and (2) a functional group-containing first-order modifier group bonded to the hydrogenated polymer (1), wherein the content of the vinyl aromatic hydrocarbon monomer units, vinyl aromatic hydrocarbon block ratio, weight average molecular weight, and hydrogenation ratio (as measured with respect to the double bonds in the conjugated diene monomer units) of the first-order modified, hydrogenated polymer are, respectively, within specific ranges.

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 output processing apparatus comprises a first storage that stores image data in a predetermined block unit, a second storage that stores a head address of each of the image data stored in the block units, and a controller that reads, from the first storage, the same line of the image data of the plural continuous blocks on a line-by-line basis based on the head address stored in the second storage, and outputs the plural lines of the readout image data to a recorder as one line of continuous image data.