Production method for polymer

Patent metadata

Field	Value
Publication number	US-10995159-B2
Application number	US-201816494640-A
Country	US
Kind code	B2
Filing date	Mar 26, 2018
Priority date	Mar 24, 2017
Publication date	May 4, 2021
Grant date	May 4, 2021

Abstract

Provided are: a novel polymerization technique by which a polymer having a controlled molecular weight or molecular weight distribution or a polymer having a desirably regulated, complicated structure can be obtained using commercially available general-purpose materials without using any radical polymerization initiator, or any special material for use in living radical polymerization and without requiring any strict polymerization conditions; a radical polymerization initiation group-containing compound for use in the technique; and a polymer obtained thereby. Specifically, provided are: a method for producing a polymer, the method including a polymerization step of mixing and warming (1) a radically polymerizable monomer, (2) an organic compound having at least one group introduced in a molecule thereof, the group functioning as a polymerization initiation group for the monomer and having a structure represented by formula 1, and (3) a chloride ion-containing and/or bromide ion-containing compound selected from among specific compounds, thereby initiating radical polymerization from the group having the structure, the radical polymerization accompanying a termination reaction; a radical polymerization initiation group-containing compound; and a polymer.

First claim

The invention claimed is:

1. A method for producing a polymer, the method comprising polymerizing a radically polymerizable monomer,
wherein the polymerizing comprises:
mixing and warming:
(1) the radically polymerizable monomer having an unsaturated bond;
(2) an organic compound having at least one group introduced in a molecule thereof, the group functioning as a radical polymerization initiation group for the monomer and having a structure represented by following formula 1;
(3) at least one chloride ion-containing or at least one bromide ion-containing compound or a combination thereof, selected from the group consisting of lithium chloride, sodium chloride, potassium chloride, calcium chloride, and magnesium chloride each being a metal chloride, lithium bromide, sodium bromide, potassium bromide, and magnesium bromide each being a metal bromide, a quaternary ammonium chloride, a quaternary ammonium bromide, a quaternary phosphonium chloride, and a quaternary phosphonium bromide, and
(4) a compound having a group selected from the group consisting of an imide group, an N-bromoimide group, and an N-iodoimide group,
thereby initiating radical polymerization of the monomer (1) from the radical polymerization initiation group having the structure of the formula 1, and
the radical polymerization accompanies a termination reaction,

wherein R 1 represents H, an alkyl group, an acyl group, or an aryl group, R 2 represents an alkyl group or an aryl group, and Y represents O or NH.

2. The method for producing a polymer according to claim 1 ,
wherein any one of an azo-based radical polymerization initiator, a peroxide-based radical polymerization initiator, and a photo radical polymerization initiator is not present in the polymerizing of the radically polymerizable monomer.

3. The method for producing a polymer according to claim 1 ,
wherein an organic solvent is further present in the polymerizing of the radically polymerizable monomer.

4. The method for producing a polymer according to claim 3 ,
wherein the organic solvent is at least one solvent selected from the group consisting of an alcohol-based solvent, a glycol-based solvent, an amide-based solvent, a urea-based solvent, a sulfoxide-based solvent, and an ionic liquid.

5. The method for producing a polymer according to claim 1 ,
wherein (1) the radically polymerizable monomer having an unsaturated bond is a methacrylic acid-based monomer.

6. The method for producing a polymer according to claim 1 ,
wherein the group having the structure represented by the formula 1 is a group having a structure represented by following formula 2:

wherein Y represents O or NH.

Assignees

• Dainichiseika Color Chem

Inventors

• Shimanaka Hiroyuki
• Murakami Yoshikazu

Classifications

• C08F2438/00

  Living radical polymerisation · CPC title

• C08K5/521

  Esters of phosphoric acids, e.g. of H3PO4 · CPC title

• C08F8/14

  Esterification · CPC title

• C08F220/14

  Methyl esters {, e.g. methyl (meth)acrylate} · CPC title

• C08F20/06 Primary

  Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof · CPC title