Porous membrane
AssigneeMitsubishi Chemical Corporation
InventorsShingo Hikita, Masashi Teramachi, Ami Shinoda, Naotaka Suenaga, Hiroki Fukuta
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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.
Claims24
A porous membrane, comprising:
- a membrane-forming polymer (A);
- and
- a polymer (B) comprising a methyl methacrylate unit and from 20 to 60% by mass of a hydroxyl group-containing (meth)acrylate (b1) unit based on the total mass of the polymer (B),
- wherein the polymer (B) is a random copolymer.
A method of manufacturing a porous membrane, the method comprising:
- coagulating a membrane-forming stock solution comprising a membrane-forming polymer (A), a polymer (B) comprising a methyl methacrylate unit and from 20 to 60% by mass of a hydroxyl group-containing (meth)acrylate (b1) unit based on the total mass of the polymer (B), and a solvent,
- wherein the polymer (B) is a random copolymer.
Dependencies are inferred from the claim text.