Method for producing multibranched polymer and multibranched polymer

Patent metadata

Field	Value
Publication number	US-10808065-B2
Application number	US-201716096825-A
Country	US
Kind code	B2
Filing date	Apr 21, 2017
Priority date	May 2, 2016
Publication date	Oct 20, 2020
Grant date	Oct 20, 2020

Abstract

Provided are a method for producing a multibranched polymer that can produce a multibranched polymer having a narrow molecular weight distribution in a one-pot procedure and the multibranched polymer. A method for producing a multibranched polymer includes the step of polymerizing a first vinyl monomer having a polymerization-initiating group in an α-position of a vinyl bond and a second vinyl monomer free of polymerization-initiating group in an α-position of a vinyl bond by a living radical polymerization.

First claim

The invention claimed is:

1. A method for producing a multibranched polymer, the method comprising the step of polymerizing a first vinyl monomer having a polymerization-initiating group in an α-position of a vinyl bond and a second vinyl monomer free of polymerization-initiating group in an α-position of a vinyl bond by a living radical polymerization wherein said polymerization-initiating group is capable of initiating living radical polymerization.

2. The method for producing a multibranched polymer according to claim 1 , wherein the living radical polymerization is a living radical polymerization in which an organotellurium compound represented by the following general formula (5), general formula (6), general formula (7) or general formula (8) or a macro-chain transfer agent obtained from the organotellurium compound is used as a chain transfer agent,

wherein in the general formulae (5) to (8), R 3 represents an alkyl group having 1 to 8 carbon atoms, an aryl group or an aromatic heterocyclic group, R 4 and R 5 each independently represent a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, R 6 represents an alkyl group having 1 to 8 carbon atoms, an aryl group, a substituted aryl group, an aromatic heterocyclic group, an alkoxy group, an acyl group, an amide group, an oxycarbonyl group a cyano group, an allyl group or a propargyl group, R 7 represents an alkylene group having 1 to 18 carbon atoms, X 1 represents an oxygen atom or —NZ— where N represents a nitrogen atom and Z represents s hydrogen atom, an alkyl group having 1 to 8 carbon atoms or a phenyl group, X 2 in the general formula (6) represents a divalent organic group, X 2 in the general formula (7) represents a trivalent organic group, and X 2 in the general formula (8) represents a tetravalent organic group.

3. The method for producing a multibranched polymer according to claim 1 , wherein the first vinyl monomer is a vinyl monomer represented by general formula (9) below,

wherein in the general formula (9), R 1 represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, an aryl group, an aromatic heterocyclic group, an alkoxy group, an acyl group, an amide group, an oxycarbonyl group or a cyano group, and R 2 represents an alkyl group having 1 to 8 carbon atoms, an aryl group, an aromatic heterocyclic group, a silyl group or a fluorine atom.

4. The method for producing a multibranched polymer according to claim 1 , wherein a use ratio of the, first vinyl monomer vs second vinyl monomer, is, in molar ratio, 0.01:99.99 to 50:50.

Assignees

• Univ Kyoto
• Otsuka Chemical Co Ltd

Inventors

• Yamago Shigeru
• Yamamoto Minoru

Classifications

• C08F230/00

  Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing phosphorus, selenium, tellurium or a metal · CPC title

• C08F4/42

  Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors · CPC title

• C08F4/04 Primary

  Azo-compounds · CPC title

• C08F4/00

  Polymerisation catalysts · CPC title

• C08F2/38

  Polymerisation using regulators, e.g. chain terminating agents {, e.g. telomerisation} · CPC title