# US 10,479,873 B2 · Method of producing polymer-impregnated base resin

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- Number: US 10,479,873 B2
- Document ID: US10479873B2
- Status: Granted
- Kind: B2
- Application number: 15/954,296
- Filed: 2018-04-16
- Published: 2018-11-15
- Granted: 2019-11-19
- Earliest claimed: 2017-05-12
- Assignees: Sumitomo Rubber Industries, Ltd.; Kyushu University, National Unviersity Corporation
- Applicants: Sumitomo Rubber Industries, Ltd.; Kyushu University, National University Corporation
- Inventors: Yasuhisa Minagawa; Keiji Tanaka; Hisao Matsuno; Toyoaki Hirata
- Web page: https://patentgrep.com/patent/US10479873B2

## CPC

- C08J 7/02: with solvents, e.g. swelling agents
- B01J 20/261: {obtained by reactions only involving carbon to carbon unsaturated bonds (macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds per se C08F)}
- B01J 20/3071: {Washing or leaching}
- B01J 20/3078: {Thermal treatment, e.g. calcining or pyrolizing}
- B01J 20/321: {consisting of a polymer obtained by reactions involving only carbon to carbon unsaturated bonds}
- B01J 20/327: {Polymers obtained by reactions involving only carbon to carbon unsaturated bonds}
- C08J 3/005: {Processes for mixing polymers}
- C08J 2325/06: Polystyrene
- C08J 2333/12: Homopolymers or copolymers of methyl methacrylate
- C08J 2375/04: Polyurethanes
- C08J 2433/14: of esters containing halogen, nitrogen, sulfur, or oxygen atoms in addition to the carboxy oxygen
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS

## Abstract

Provided is a method of producing a polymer-impregnated base resin which is excellent in providing low adsorption of proteins and blood cells such as platelets. The method of producing a polymer-impregnated base resin includes impregnating a base resin with a polymer solution that includes a solvent able to swell the base resin.

## Claims

### Claim 1

A method of producing a polymer-impregnated base resin, the method comprising impregnating a base resin with a polymer solution that comprises a solvent able to swell the base resin,
wherein the polymer is at least one selected from the group consisting of a homopolymer or copolymer of one or two or more hydrophilic monomers, and a copolymer of one or two or more hydrophilic monomers with an additional monomer(s), and
wherein at least one of the hydrophilic monomer is an alkoxyalkyl (meth)acrylate.

### Claim 2 (depends on 1)

The method of producing a polymer-impregnated base resin according to claim 1,
wherein the method comprises, after the impregnation, removing the solvent of the polymer solution, followed by washing with the same solvent as that used in the polymer solution.

### Claim 3 (depends on 1)

The method of producing a polymer-impregnated base resin according to claim 1,
wherein the base resin comprises at least one material selected from the group consisting of acrylic resins, cycloolefin resins, carbonate resins, and styrene resins.

### Claim 4 (depends on 1)

The method of producing a polymer-impregnated base resin according to claim 1,
wherein the solvent of the polymer solution comprises at least one alcohol.

### Claim 5 (depends on 1)

The method of producing a polymer-impregnated base resin according to claim 1,
wherein the alkoxyalkyl (meth)acrylate is 2-methoxyethyl acrylate.