Mitsubishi Chemical Corporation

Shingo Hikita

Tetsuya Noda

Taeko Oonuma

Hiroki Fukuta

Masashi Teramachi

Ami Shinoda

Seiichiro Mori

Mitsufumi Nodono

Fuminori Nakaya

Naotaka Suenaga

Kousuke Fujiyama

Masanari Nishimura

Yuuki Fujii

Megumi Kubo

Masakazu Itou

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. 

Porous membrane, membrane module, water treatment device, and method for manufacturing porous membrane

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 (m/m/MPa/h) or more and less than 200 (m/m/MPa/h). The contact angle of the bulk of the membrane-forming polymer (A) is preferably 60&#xb0; or more. The membrane-forming polymer (A) is preferably a fluorine-containing polymer. The polymer (B) is preferably a random copolymer.

Porous membrane

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. 

Polymer, production method for same, and molded article

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 &#x3bc;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.

Resin composition, membrane-forming stock solution, porous membrane, and hollow fiber membrane, water treatment device, electrolyte support, and separator using porous membrane

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. 

Polymer composition and porous membrane

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:

Growing community of inventors

Otake, Japan

Shingo Hikita