Abstract: Provided is a porous membrane that can be manufactured in uncomplicated steps, has high hydrophilicity and water permeability, and exhibits excellent anti-fouling properties when used in a membrane bioreactor method (MBR method). The porous membrane of the present invention is a porous membrane containing polymer (A) and polymer (B), wherein the polymer (A) is a membrane-forming polymer, the polymer (B) is a polymer having a unit (b1) represented by formula (1) and a unit (b2) based on hydroxyl group-containing (meth)acrylate, and the concentration (mass %) of the unit (b1) is equal to or higher than the concentration (mass %) of the unit (b2) in the porous membrane.

Abstract: A porous membrane comprising a membrane-forming polymer (A) and a polymer (B) containing a methyl methacrylate unit and a hydroxyl group-containing (meth)acrylate (b1) unit. A flux of pure water to permeate the porous membrane is preferably 10 (m3/m2/MPa/h) or more and less than 200 (m3/m2/MPa/h). The contact angle of the bulk of the membrane-forming polymer (A) is preferably 60° or more. The membrane-forming polymer (A) is preferably a fluorine-containing polymer. The polymer (B) is preferably a random copolymer.

Abstract: The present application pertains to a production method for a polymer, including a step for polymerizing a starting material composition (I) that includes: a monomer mixture (I-1) containing a macromonomer (a) represented by the following formula (1), and (b) a vinyl monomer; and 0.01 to 5 parts by mass of a non-metallic chain transfer agent with respect to 100 parts by mass of the monomer mixture (I-1); a polymer obtained by the production method; and a molded article. According to the present invention, there can be provided a polymer having exceptional resistance to dwell-induced degradation, and a molded article having exceptional yellowing resistance, a low haze value, and exceptional pliability.

Abstract: The present invention pertains to a resin composition which includes component: a membrane-forming polymer, component: a polymer obtained by polymerizing a monomer composition which includes a (meth)acrylic ester macromonomer represented by general formula and another monomer, and component: a polymer including a vinylpyrrolidone unit, a membrane-forming stock solution which includes the resin composition, a porous membrane obtained by forming with the membrane-forming stock solution, and a hollow fiber membrane, a water treatment device, an electrolyte support, and a separator which use the porous membrane. According to the present invention, it is possible to provide a porous membrane which has pores with high uniformity wherein the formation of large pores with a diameter of 1 ?m or higher is suppressed and which has excellent fractionation performance and high water permeability, and a hollow fiber membrane, water treatment device, electrolyte support, and separator which use the porous membrane.

Abstract: Provided is a porous membrane that can be manufactured in uncomplicated steps, has high hydrophilicity and water permeability, and exhibits excellent anti-fouling properties when used in a membrane bioreactor method (MBR method). The porous membrane of the present invention is a porous membrane containing polymer (A) and polymer (B), wherein the polymer (A) is a membrane-forming polymer, the polymer (B) is a polymer having a unit (b1) represented by formula (1) and a unit (b2) based on hydroxyl group-containing (meth)acrylate, and the concentration (mass %) of the unit (b1) is equal to or higher than the concentration (mass %) of the unit (b2) in the porous membrane.

Abstract: A porous membrane comprising a membrane-forming polymer (A) and a polymer (B) containing a methyl methacrylate unit and a hydroxyl group-containing (meth)acrylate (b1) unit. A flux of pure water to permeate the porous membrane is preferably 10 (m3/m2/MPa/h) or more and less than 200 (m3/m2/MPa/h). The contact angle of the bulk of the membrane-forming polymer (A) is preferably 60° or more. The membrane-forming polymer (A) is preferably a fluorine-containing polymer. The polymer (B) is preferably a random copolymer.

Abstract: A polymer composition containing a polymer (B) obtained by polymerizing a monomer composition containing: a methacrylic acid ester macromonomer (b1) represented by the following formula (1); and another monomer (b2). Also, a porous membrane formed from a membrane forming polymer (A) and the aforementioned polymer composition.

Abstract: A molded product with excellent transparency can be obtained by using a polymer (D) obtained by suspension polymerization of a monomer mixture (1) containing (a) to (c) below: (a) 5-60 mass % of a specific macromonomer; (b) 5-60 mass % of the raw material monomer of a homopolymer (B) that has a solubility parameter that is different by 0.25 or more from the solubility parameter of the macromonomer (a); and (c) 10-80 mass % of the raw material monomer of a homopolymer (C) that has a solubility parameter that is different by less than 0.25 from the solubility parameter of macromonomer (a).

Abstract: A polymer composition containing a polymer (B) obtained by polymerizing a monomer composition containing: a methacrylic acid ester macromonomer (b1) represented by the following formula (1); and another monomer (b2). Also, a porous membrane formed from a membrane forming polymer (A) and the aforementioned polymer composition.

Abstract: The present application pertains to a production method for a polymer, including a step for polymerizing a starting material composition (I) that includes: a monomer mixture (I-1) containing a macromonomer (a) represented by the following formula (1), and (b) a vinyl monomer; and 0.01 to 5 parts by mass of a non-metallic chain transfer agent with respect to 100 parts by mass of the monomer mixture (I-1); a polymer obtained by the production method; and a molded article. According to the present invention, there can be provided a polymer having exceptional resistance to dwell-induced degradation, and a molded article having exceptional yellowing resistance, a low haze value, and exceptional pliability.

Abstract: A molded product with excellent transparency can be obtained by using a polymer (D) obtained by suspension polymerization of a monomer mixture (1) containing (a) to (c) below: (a) 5-60 mass % of a specific macromonomer; (b) 5-60 mass % of the raw material monomer of a homopolymer (B) that has a solubility parameter that is different by 0.25 or more from the solubility parameter of the macromonomer (a); and (c) 10-80 mass % of the raw material monomer of a homopolymer (C) that has a solubility parameter that is different by less than 0.25 from the solubility parameter of macromonomer (a).

Abstract: The present invention pertains to a resin composition which includes component: a membrane-forming polymer, component: a polymer obtained by polymerizing a monomer composition which includes a (meth)acrylic ester macromonomer represented by general formula and another monomer, and component: a polymer including a vinylpyrrolidone unit, a membrane-forming stock solution which includes the resin composition, a porous membrane obtained by forming with the membrane-forming stock solution, and a hollow fiber membrane, a water treatment device, an electrolyte support, and a separator which use the porous membrane. According to the present invention, it is possible to provide a porous membrane which has pores with high uniformity wherein the formation of large pores with a diameter of 1 ?m or higher is suppressed and which has excellent fractionation performance and high water permeability, and a hollow fiber membrane, water treatment device, electrolyte support, and separator which use the porous membrane.

Abstract: A polymer composition containing a polymer (B) obtained by polymerizing a monomer composition containing: a methacrylic acid ester macromonomer (b1) represented by the following formula (1); and another monomer (b2). Also, a porous membrane formed from a membrane forming polymer (A) and the aforementioned polymer composition.