Method for producing homopolymer or random copolymer of hydroxyl group-containing vinyl ether

Patent metadata

Field	Value
Publication number	US-9777085-B2
Application number	US-201314378155-A
Country	US
Kind code	B2
Filing date	Feb 4, 2013
Priority date	Feb 14, 2012
Publication date	Oct 3, 2017
Grant date	Oct 3, 2017

Abstract

A method of producing a homopolymer or random copolymer of hydroxyl group-containing vinyl ether by polymerizing a monomer component comprising at least one hydroxyl group-containing vinyl ether using an oil-soluble radical polymerization initiator in the absence or presence of a solvent.

First claim

The invention claimed is:

1. A method of producing a homopolymer of a hydroxyl group-containing vinyl ether, said method comprising the step of polymerizing vinyl ether monomer components only, using an organic azo compound as an oil-soluble radical polymerization initiator in the absence or presence of a solvent, said monomer components consisting of a first hydroxyl group-containing vinyl ether, said first hydroxyl group-containing vinyl ether represented by the following formula (1):
CH 2 ═CH—O—R 1 OH) n   (1)

wherein R 1 represents an aliphatic hydrocarbon group having 1 to 10 carbon atoms or an alkoxy alkyl group having 3 to 7 carbon atoms, which is optionally branched and optionally comprises a cyclic structure; and n is 1 to 5,
wherein said homopolymer has a weight average molecular weight (Mw) within the range of 3000 to 100,000.

2. The method of production according to claim 1 , wherein said homopolymer has a weight average molecular weight (Mw) within the range of 5000 to 100,000.

3. The method of production according to claim 1 , wherein a content of polyacetal by-product is not more than 10% by weight.

4. The method of production according to claim 1 , wherein said solvent is water or an organic solvent comprising at least one water-soluble organic solvent.

5. The method of production according to claim 3 , wherein said water-soluble organic solvent is selected from the group consisting of alcohol, alkyl amide, alkyl sulfoxide and ketone.

6. The method of production according to claim 1 , wherein said homopolymer is a thermal stimulation responsive polymer.

7. The method of production according to claim 1 , wherein said polymerizing is carried out in the absence of a solvent.

8. The method of production according to claim 1 , wherein said polymerizing is carried out in the presence of a polymerization solvent selected from the group consisting of water, methanol, ethanol and isopropanol.

9. The method of production according to claim 1 , wherein said organic azo compound is 2,2′-azobisisobutyronitrile or dimethyl-2,2′-azobis isobutyrate.

Assignees

• Maruzen Petrochem Co Ltd

Inventors

• Sugihara Shinji
• MASUKAWA Tomohiro

Classifications

• C08F216/20

  Monomers containing three or more carbon atoms in the unsaturated aliphatic radical · CPC title

• C08F116/14 Primary

  Monomers containing only one unsaturated aliphatic radical · CPC title

• C08F16/26

  Monomers containing oxygen atoms in addition to the ether oxygen · CPC title

• C08F216/1416

  Monomers containing oxygen in addition to the ether oxygen, e.g. allyl glycidyl ether · CPC title