Abstract: An object of the present invention is to provide a hydrogenated copolymer composition and the like having an excellent balance among initial tack strength, suppression of increase in tackiness, and suppression of uneven thicknesses of a tacky layer. The object can be achieved with the following hydrogenated copolymer composition. A hydrogenated copolymer composition comprising: a component (a) comprising a polymer block comprising a vinyl aromatic monomer unit as a main component and a polymer block comprising a conjugated diene monomer unit as a main component; and a component (b) comprising a polymer block comprising a vinyl aromatic monomer unit as a main component and a polymer block comprising a conjugated diene monomer unit as a main component.

Abstract: A hydrogenated block copolymer (P) obtained by hydrogenation of a coupled polymer represented by (A-B)n-X, wherein the content of the vinyl aromatic monomer unit in the hydrogenated block copolymer (P) is 10 mass % to 40 mass %, the peak top molecular weight of a diblock component corresponding to (A-B) in (A-B)n-X is 160,000 to 225,000, the proportion of a dibranched component corresponding to a case in which n is 2 in (A-B)n-X is 10 mass % to 30 mass % based on the total hydrogenated block copolymer (P), the proportion of a tribranched component corresponding to a case in which n is 3 in (A-B)n-X is 40 mass % to 70 mass % based on the total hydrogenated block copolymer (P), and the ratio of the tribranched component to the dibranched component M (mass of tribranched component/mass of dibranched component) is 2 or more.

Abstract: Disclosure provides a block copolymer composition having 20% by mass or more and 90% by mass or less of a component (A) and 10% by mass or more and 80% by mass or less of a component (B), wherein the component (A) is a block copolymer having a polymer block mainly comprising a vinyl aromatic monomer unit and a polymer block mainly comprising a conjugated diene monomer unit, and having a weight-average molecular weight of 30,000 or higher and 190,000 or lower; and the component (B) is a block copolymer having a polymer block mainly comprising a vinyl aromatic monomer unit and a polymer block mainly comprising a conjugated diene monomer unit, and having a weight-average molecular weight of 60,000 or higher and 500,000 or lower.

Abstract: A hydrogenated block copolymer composition, comprising: a component (A) comprising at least one polymer block comprising a vinyl aromatic hydrocarbon as a primary component and at least one polymer block comprising a conjugated diene compound as a primary component and having a weight-average molecular weight of 30,000 or higher and 500,000 or lower, and a component (B) comprising at least two polymer blocks comprising a vinyl aromatic hydrocarbon and at least one polymer block comprising a conjugated diene compound as a primary component and having a weight-average molecular weight of 50,000 or higher and 1,000,000 or lower, wherein the composition satisfies predetermined requirements.

Abstract: The present invention provides a method for producing a polymer by efficiently removing residue of metals such as titanium, aluminum and lithium from a polymer solution containing the residue of these metals to successfully obtain a purified polymer solution containing a smaller amount of the metal residue and having satisfactory color tone and transparency, a polymer solution and a polymer obtained by the production method.

Abstract: A composition containing an oxide of titanium contains a conjugated dienic polymer and the oxide of titanium, wherein the content of the oxide of titanium is 0.10 to 75 ppm by mass in terms of titanium atom, and the average particle diameter of the oxide of titanium is 1.0 to 100 ?m.

Abstract: There is provided a crumb of a block copolymer, which is excellent in transportability and, when used for a pressure-sensitive adhesive composition, is capable of forming a pressure-sensitive adhesive composition excellent in solubility, the low-melt viscosity property, the low-odor property, and the balance among these properties. The present invention relates to a crumb of a block copolymer, comprising at least one polymer block comprising a vinyl aromatic hydrocarbon monomer unit as a primary component and at least one polymer block comprising a conjugated diene compound monomer unit as a primary component, having a weight-average molecular weight of 20,000 to 1,000,000, and having a specific surface area, a cumulative pore volume of pores having a pore radius of 1 ?m to 100 ?m, and an average pore radius that are in respective predetermined ranges.

Abstract: A hydrogenated block copolymer composition, comprising: a component (A) comprising at least one polymer block comprising a vinyl aromatic hydrocarbon as a primary component and at least one polymer block comprising a conjugated diene compound as a primary component and having a weight-average molecular weight of 30,000 or higher and 500,000 or lower, and a component (B) comprising at least two polymer blocks comprising a vinyl aromatic hydrocarbon and at least one polymer block comprising a conjugated diene compound as a primary component and having a weight-average molecular weight of 50,000 or higher and 1,000,000 or lower, wherein the composition satisfies predetermined requirements.

Abstract: The present invention relates to a method for producing a hydrogenated conjugated diene copolymer including a polymerization step and a hydrogenation step, wherein in the polymerization step, a conjugated diene copolymer having a high vinyl bond amount of a conjugated diene block moiety and a narrow molecular weight distribution can be produced, and in the hydrogenation step, the rate of hydrogenation is high and productivity is excellent.

Abstract: The present invention is related to a method for producing a polymer to efficiently remove metal residues of at least lithium and/or titanium from a polymer solution comprising the at least lithium and/or titanium to thereby obtain a refined polymer solution having little metal residue.

Abstract: Disclosure provides a block copolymer composition having 20% by mass or more and 90% by mass or less of a component (A) and 10% by mass or more and 80% by mass or less of a component (B), wherein the component (A) is a block copolymer having a polymer block mainly comprising a vinyl aromatic monomer unit and a polymer block mainly comprising a conjugated diene monomer unit, and having a weight-average molecular weight of 30,000 or higher and 190,000 or lower; and the component (B) is a block copolymer having a polymer block mainly comprising a vinyl aromatic monomer unit and a polymer block mainly comprising a conjugated diene monomer unit, and having a weight-average molecular weight of 60,000 or higher and 500,000 or lower.

Abstract: A composition containing an oxide of titanium contains a conjugated dienic polymer and the oxide of titanium, wherein the content of the oxide of titanium is 0.10 to 75 ppm by mass in terms of titanium atom, and the average particle diameter of the oxide of titanium is 1.0 to 100 ?m.

Abstract: The present invention provides a method for producing a polymer by efficiently removing residue of metals such as titanium, aluminum and lithium from a polymer solution containing the residue of these metals to successfully obtain a purified polymer solution containing a smaller amount of the metal residue and having satisfactory color tone and transparency, a polymer solution and a polymer obtained by the production method.

Abstract: The present invention is related to a method for producing a polymer to efficiently remove metal residues of at least lithium and/or titanium from a polymer solution comprising the at least lithium and/or titanium to thereby obtain a refined polymer solution having little metal residue.

Abstract: The present invention relates to a method for producing a hydrogenated conjugated diene copolymer including a polymerization step and a hydrogenation step, wherein in the polymerization step, a conjugated diene copolymer having a high vinyl bond amount of a conjugated diene block moiety and a narrow molecular weight distribution can be produced, and in the hydrogenation step, the rate of hydrogenation is high and productivity is excellent.