Conjugated diene polymer and method for producing same

Patent metadata

Field	Value
Publication number	US-9243100-B2
Application number	US-201214344118-A
Country	US
Kind code	B2
Filing date	Sep 4, 2012
Priority date	Sep 12, 2011
Publication date	Jan 26, 2016
Grant date	Jan 26, 2016

Abstract

Conjugated diene polymer comprising at least a conjugated diene monomer unit, the conjugated diene polymer has a number-average molecular weight (Mn) in terms of polystyrene of 1,000 to 1,000,000, a ratio (Mw/Mn) of a weight-average molecular weight (Mw) to the number-average molecular weight (Mn) of lower than 2.0 and the polymer bears a halogen atom at a terminal of the polymer chain. Method for producing the conjugated diene polymer comprises subjecting a monomer containing at least a conjugated diene to living radical polymerization using a polymerization initiator comprising a halogenocyclopentadienyl triorganophosphine η 2 -olefin ruthenium complex represented by formula (6) (and an organic halide.

First claim

The invention claimed is:

1. A conjugated diene polymer comprising at least a conjugated diene monomer unit;
wherein the polymer has at least one group as a terminal group of a polymer chain selected from the group consisting of a group represented by formula (1), a group represented by formula (2), and a group represented by formula (3),

 wherein in formula (1) X represents a chlorine atom, a bromine atom or an iodine atom; and R 1 , R 2 , R 3 and R 4 each represent a hydrogen atom, an optionally substituted hydrocarbon group having 1 to 10 carbon atoms, or a halogen atom,

 wherein in formula (2) X represents a chlorine atom, a bromine atom or an iodine atom; and R 5 , R 6 , R 7 and R 8 each represent a hydrogen atom, an optionally substituted hydrocarbon group having 1 to 10 carbon atoms, or a halogen atom,

 wherein in formula (3) X represents a chlorine atom, a bromine atom or an iodine atom; R 9 represents an aryl group, a cyano group, an ester group represented by formula (4), an amide group represented by formula (5), or a halogen atom; and R 10 represents a hydrogen atom or a methyl group,

 wherein in formula (4) Y 1 represents a hydrogen atom or an optionally substituted organic group having 1 to 10 carbon atoms, and

 wherein in formula (5) Y 2 and Y 3 each represent a hydrogen atom or an optionally substituted organic group having 1 to 10 carbon atoms; and Y 2 and Y 3 may be the same as or different from each other; and
wherein the conjugated diene polymer has a number-average molecular weight (Mn) in terms of polystyrene of 1,000 to 1,000,000, a ratio (Mw/Mn) of a weight-average molecular weight (Mw) to the number-average molecular weight (Mn) of lower than 2.0 and the conjugated diene polymer bears a halogen atom at a terminal of the polymer chain.

2. The conjugated diene polymer according to claim 1 , wherein 10% or higher of all polymer chains have a halogen atom at its terminal.

3. The conjugated diene polymer according to claim 1 , wherein the conjugated diene polymer is obtained by a living radical polymerization.

Assignees

• Bando Fumiaki
• Okuno Shingo
• Hayano Shigetaka
• Sawamoto Mitsuo
• Ouchi Makoto
• Zeon Corp
• Univ Kyoto

Inventors

• Bando Fumiaki
• Okuno Shingo
• Hayano Shigetaka
• Sawamoto Mitsuo
• Ouchi Makoto

Classifications

• C08F4/80

  selected from iron group metals or platinum group metals · CPC title

• C08F136/08 Primary

  Isoprene · CPC title

• C08F236/12 Primary

  with nitriles · CPC title

• C08F4/72

  selected from metals not provided for in group C08F4/44 (C08F4/54 - C08F4/70 take precedence) · CPC title

• C08C19/12

  Incorporating halogen atoms into the molecule · CPC title