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

Patent metadata

Field	Value
Publication number	US-2016038884-A1
Application number	US-201414775770-A
Country	US
Kind code	A1
Filing date	Mar 14, 2014
Priority date	Mar 15, 2013
Publication date	Feb 11, 2016
Grant date	—

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 μm 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.

First claim

1 . A resin composition comprising the following component (A), component (B), and component (C);
component (A): a membrane-forming polymer, component (B): a polymer obtained by polymerizing a monomer composition containing a (meth)acrylic acid ester macromonomer (b1) represented by the following Formula (1) and another monomer (b2), and component (C): a polymer containing a vinylpyrrolidone unit;

(in Formula (1) above, R and R 1 to R n each independently represent a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group, or a heterocyclic group, X 1 to X n each independently represent a hydrogen atom or a methyl group, Z represents a terminal group, and n represents a natural number of from 3 to 10,000).

2 . The resin composition according to claim 1 , wherein the component (A) is a polymer containing a fluorine atom or a chlorine atom in the molecule.

3 . The resin composition according to claim 2 , wherein the polymer containing a fluorine atom in the molecule is at least one polymer selected from the group consisting of polyvinylidene fluoride, a polyvinylidene fluoride-hexafluoropropylene copolymer, an ethylene-chlorotrifluoroethylene copolymer, and polytetrafluoroethylene.

4 . The resin composition according to claim 2 , wherein the polymer containing a chlorine atom in the molecule is at least one polymer selected from the group consisting of polyvinyl chloride and chlorinated polyvinyl chloride.

5 . The resin composition according to claim 1 , wherein the component (A) is at least one polymer selected from the group consisting of a polyolefin, a polysulfone, polyether sulfone, cellulose, and any derivative thereof.

6 . The resin composition according to claim 1 , wherein a proportion of a monomer unit of the macromonomer (b1) with respect to a total mass of a monomer unit of the macromonomer (b1) and a monomer unit of another monomer (b2) in the component (B) is from 5 to 99% by mass.

7 . The resin composition according to claim 1 , wherein another monomer (b2) is at least one (meth)acrylic acid ester selected from the group consisting of (meth)acrylic acid, a (meth)acrylic acid ester having a polyethylene glycol unit in a side chain, and a (meth)acrylic acid ester having a hydroxyl group.

8 . The resin composition according to claim 1 , wherein a content of the component (C) with respect to 100 parts by mass of a total amount of the component (A), the component (B), and the component (C) is from 0.1 to 50 parts by mass.

9 . A membrane-forming stock solution comprising the resin composition according to claim 1 and a solvent capable of dissolving the component (A).

10 . The membrane-forming stock solution according to claim 9 , wherein a transmittance of visible light at a wavelength of 400 nm is 70% or more.

11 . A porous membrane obtained by a production method including a step of obtaining a porous membrane precursor using the membrane-forming stock solution according to claim 9 and a step of removing a part or the whole of the component (C) from the precursor.

12 . A hollow fiber membrane comprising the porous membrane according to claim 11 .

13 . An electrolyte support comprising the porous membrane according to claim 11 and an electrolyte.

14 . A separator comprising the porous membrane according to claim 11 .

15 . A water treatment device comprising the porous membrane according to claim 11 .

Assignees

• Mitsubishi Rayon Co

Inventors

• Hikita Shingo
• Noda Tetsuya
• Nodono Mitsufumi

Classifications

• B01D2323/12

  Specific ratios of components used · CPC title

• C09D133/04

  Homopolymers or copolymers of esters {(C09D143/04 takes precedence)} · CPC title

• C08J2201/0544

  the non-solvent being aqueous · CPC title

• C08J2439/06

  Homopolymers or copolymers of N-vinyl-pyrrolidones · CPC title

• C08L55/005

  Homopolymers or copolymers obtained by polymerisation of macromolecular compounds terminated by a carbon-to-carbon double bond · CPC title