Mitsubishi Chemical Corporation

Hiroki Fukuta

Shingo Hikita

Masashi Teramachi

Ami Shinoda

Seiichiro Mori

Eiko Okamoto

Hiroshi Niino

Takahiro Mukuda

Hiroko Shinada

Naotaka Suenaga

Fumiko Fujie

Kazunari Matsumura

Yuuki Fujii

Megumi Kubo

Katsufumi Mochizuki

Hiroki Hamamoto

A polymer composition, in which a differential distribution value in a differential molecular weight distribution curve of the polymer composition, as measured by gel permeation chromatography, satisfies Equation 1 and a maximum value of a normalized back-scattering intensity of a 35 wt % base oil solution of the polymer composition, where a size q of a scattering vector of small-angle X-ray scattering at 25° C. is in a range of 0.07 nmor more and 2 nmor less, is 40 cmor more.

Polymer composition, lubricant additive, viscosity index improver, lubricant composition, method for producing polymer composition, and method for producing macromonomer

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

Growing community of inventors

Tokyo, Japan

Hiroki Fukuta