Modified conjugated diene polymer, a modified rubber composition containing same, and method for preparing modified conjugated diene polymer

Patent metadata

Field	Value
Publication number	US-10118974-B2
Application number	US-201515121804-A
Country	US
Kind code	B2
Filing date	Nov 3, 2015
Priority date	Dec 11, 2014
Publication date	Nov 6, 2018
Grant date	Nov 6, 2018

Abstract

Disclosed are a modified conjugated diene-based polymer represented by a specific Chemical Formula and a method of preparing the same.

First claim

The invention claimed is:

1. A modified conjugated diene-based polymer, which is a compound represented by Chemical Formula 2 below:

wherein R 2 is

 or a C1-C50 alkyl group, Pn and Pm are polymers comprising a conjugated diene monomer and a conjugated aromatic monomer as main components, with a number average molecular weight of 1,000 to 10,000,000 g/mol, and including an acryl, amine, ether or thioether monomer, Pn and Pm are identical to or different from each other, a is 1 to 3, b is 0 to 3, n is 1 to 20, and m is 0 to 20.

2. The modified conjugated diene-based polymer of claim 1 , wherein the compound represented by Chemical Formula 2 is a compound represented by Chemical Formula 2a below:

wherein a1 to a8 each range from 10 to 100,000.

3. A method of preparing a modified conjugated diene-based polymer, comprising:
a) polymerizing a conjugated diene monomer or a conjugated diene monomer and an aromatic vinyl monomer using a hydrocarbon solvent in presence of an organo-alkali metal compound, thus forming an active polymer having an alkali metal end; and
b) coupling or linking the active polymer having the alkali metal end with a compound represented by Chemical Formula 1 below, yielding a modified conjugated diene-based polymer, which is a compound represented by Chemical Formula 2 below:

wherein R 1 is

 or a C1-C50 alkyl group, n is 1 to 20, and m is 0 to 20; and

wherein R 2 is

 or a C1-C50 alkyl group, Pn and Pm are polymers comprising a conjugated diene monomer and a conjugated aromatic monomer as main components, with a number average molecular weight of 1,000 to 10,000,000 g/mol, and including an acryl, amine, ether or thioether monomer, Pn and Pm are identical to or different from each other, a is 1 to 3, b is 0 to 3, n is 1 to 20, and m is 0 to 20.

4. The method of claim 3 , wherein the compound represented by Chemical Formula 1 is a compound represented by Chemical Formula 1a below

5. The method of claim 3 , wherein the compound represented by Chemical Formula 2 is a compound represented by Chemical Formula 2a below:

wherein a1 to a8 each range from 10 to 100,000.

6. The method of claim 3 , wherein the organo-alkali metal compound is used in an amount of 0.01 to 10 mmol based on 100 g in total of the monomer.

7. The method of claim 3 , wherein a molar ratio of the organo-alkali metal compound and the compound represented by Chemical Formula 1 is 1:0.1 to 1:10.

8. The method of claim 3 , wherein the polymerizing in a) is performed with additional use of a polar additive.

9. The method of claim 8 , wherein the polar additive is added in an amount of 0.001 to 50 g based on 1 mmol in total of the compound represented by Chemical Formula 1.

10. A modifier, which is a compound represented by Chemical Formula 1 below:

wherein R 1 is

 or a C1-C50 alkyl group, n is 1 to 20, and m is 0 to 20.

11. The modifier of claim 10 , wherein the compound represented by Chemical Formula 1 is a compound represented by Chemical Formula 1a below

12. A modified conjugated diene-based polymer rubber composition, comprising 10 to 100 parts by weight of the modified conjugated diene-based polymer of claim 1 and 0.1 to 200 parts by weight of an inorganic filler based on 100 parts by weight of the modified conjugated diene-based polymer.

13. The modified conjugated diene-based polymer rubber composition of claim 12 , wherein the inorganic filler comprises at least one of carbon black and silica.

14. A tire or tire tread, comprising the modified conjugated diene-based polymer rubber composition of claimed 12 .

Assignees

• Lg Chemical Ltd

Inventors

• Sohn Hae-Sung
• Kim No-Ma
• Lee He-Seung

Classifications

• B60C1/0016

  Compositions of the tread · CPC title

• C08L15/00

  Compositions of rubber derivatives (C08L11/00, C08L13/00 take precedence) · CPC title

• C07F7/1868

  Chemistry & Metallurgy · mapped topic

• Y02T10/862

  Cross-Sectional Technologies · mapped topic

• C08K3/36

  Silica · CPC title