Abstract: A polyarylene ether ketone resin of the present disclosure satisfies the following (A) to (D): (A) the residual amount of each element classified into Period 2 to Period 6 among the Group 3 to Group 13 elements in the periodic table excluding Tc (technetium) and Pm (promethium) of which no stable isotopes exist is 100 ppm or less; (B) the residual amount of each of Cl and Br elements is 100 ppm or less; (C) the residual amount of P is 100 ppm or less; and (D) the repeating unit (1-1) represented by the general formula (1-1) is included. The molar ratio of ketone groups in all repeating units included in the resin and the molar ratio of ether groups in the all repeating units, to the total carbon number in the all repeating units, are 9.5% by mol or more and 4.5% by mol or more, respectively.

Abstract: It could be helpful to provide a thermoplastic elastomer excellent in transparency, etc., while having mechanical properties such as high heat resistance, strength, and flexibility. The thermoplastic elastomer of this disclosure primarily comprises a copolymer including a block structural unit derived from a polymer (A) that contains a polyphenylene ether and has a glass transition temperature of 120° C. or more, and a block structural unit derived from a polymer (B) that primarily contains a diene rubber and has a glass transition temperature of 20° C. or less.

Abstract: Polyoxymethylene, where a ratio of a low molecular weight component having a molecular weight of 10,000 or less in a molecular weight distribution is 7.0% or less of the total, and the molecular weight distribution is obtained by measurement by gel permeation chromatography (GPC) using polymethyl methacrylate (PMMA) as a standard substance.

Abstract: A method of accurately separating immunoglobulin monomers by subjecting an immunoglobulin solution containing at least immunoglobulin monomers and immunoglobulin aggregates to cross-flow filtration using an ultrafiltration membrane, an ultrafiltration membrane module, and a cross-flow filtration apparatus. The method can separate immunoglobulin monomers by subjecting an immunoglobulin solution containing at least immunoglobulin monomers and immunoglobulin aggregates and having an immunoglobulin concentration of 1 to 150 g/L to cross-flow filtration using an ultrafiltration membrane having a molecular weight cut-off of 100,000 or more and less than 500,000 so that immunoglobulin monomers passes through the ultrafiltration membrane with a permeability of 80% or more while achieving a fractionation performance in which the permeability ratio of immunoglobulin dimers to immunoglobulin monomers that pass through the ultrafiltration membrane is 0.20 or less.

Abstract: [Problems] To provide a novel hydrophilized separation membrane for use in the treatment of a liquid, which comprises an aromatic ether polymer, is less likely to be degraded by sterilization with a high energy ray and has a controlled pore size and a high water permeability. [Means for Solving Problems] A porous separation membrane for use in the treatment of a liquid which is produced by a wet film formation process using an aromatic ether polymer and a hydrophilizing agent. The separation membrane can be used for medical purposes or in a pharmaceutical of food.

Abstract: One object of the present invention is to provide polymers suitable for use as medical materials. The present invention provides a polymer useful as a medical material having the general formula -(A)1-(B)m—(C)n—??(I) in which A is derived from an alkoxyalkyl (alkyl)acrylate monomer; B is derived from a monomer containing a primary, secondary, tertiary or quaternary amine group; C is derived from a non-ionic monomer; and 1+m+n=100,0<1, m, n<100.

Abstract: One object of the present invention is to provide polymers suitable for use as medical materials. The present invention provides a polymer useful as a medical material having the general formula -(A)l-(B)m-(C)n-??(I) in which A is derived from a non-ionic monomer; B is derived from a monomer containing a primary, secondary, tertiary or quaternary amine group; C is derived from a monomer containing an acid group; and l+m+n=100, 0<l, m, n<100.

Abstract: A method of accurately separating immunoglobulin monomers by subjecting an immunoglobulin solution containing at least immunoglobulin monomers and immunoglobulin aggregates to cross-flow filtration using an ultrafiltration membrane, an ultrafiltration membrane module, and a cross-flow filtration apparatus. The method can separate immunoglobulin monomers by subjecting an immunoglobulin solution containing at least immunoglobulin monomers and immunoglobulin aggregates and having an immunoglobulin concentration of 1 to 150 g/L to cross-flow filtration using an ultrafiltration membrane having a molecular weight cut-off of 100,000 or more and less than 500,000 so that immunoglobulin monomers passes through the ultrafiltration membrane with a permeability of 80% or more while achieving a fractionation performance in which the permeability ratio of immunoglobulin dimers to immunoglobulin monomers that pass through the ultrafiltration membrane is 0.20 or less.

Abstract: [Problems] To provide a novel hydrophilized separation membrane for use in the treatment of a liquid, which comprises an aromatic ether polymer, is less likely to be degraded by sterilization with a high energy ray and has a controlled pore size and a high water permeability. [Means for Solving Problems] A porous separation membrane for use in the treatment of a liquid which is produced by a wet film formation process using an aromatic ether polymer and a hydrophilizing agent. The separation membrane can be used for medical purposes or in a pharmaceutical of food.

Abstract: It is intended to provide a polymer for coating a leukocyte removal filter material which is excellent in the capability of removing leukocytes. It is further intended to provide a filter whereby both of leukocytes and platelets can be highly efficiently removed from a blood product containing leukocytes and platelets. The above objects can be achieved by using a polymer for coating a leukocyte removal filter material which comprises a unit originating in a hydrophobic polymerizable monomer, a unit originating in a polymerizable monomer containing a basic nitrogen-containing part, and a unit originating in a polymerizable monomer containing a protonic neutral hydrophilic part.

Abstract: One object of the present invention is to provide polymers suitable for use as medical materials. The present invention provides a polymer useful as a medical material having the general formula -(A)I-(B)m—(C)n— ??(I) in which A is derived from a non-ionic monomer; B is derived from a monomer containing a primary, secondary, tertiary or quaternary amine group; C is derived from a monomer containing an acid group; and 1+m+n=100,0<1,m,n<100.