Azasilane-based modifier, and method for preparing modified and conjugated diene-based polymer using the same

Patent metadata

Field	Value
Publication number	US-10538601-B2
Application number	US-201715748931-A
Country	US
Kind code	B2
Filing date	Feb 24, 2017
Priority date	Feb 29, 2016
Publication date	Jan 21, 2020
Grant date	Jan 21, 2020

Abstract

The present invention provides an azasilane-based modifier of Formula 1, which may easily introduce a functional group having affinity with a filler into a conjugated diene-based polymer chain, a modified and conjugated diene-based polymer including the functional group derived from the azasilane-based modifier, a method for preparing the modified and conjugated diene-based polymer, a rubber composition including the modified and conjugated diene-based polymer, and a molded article and a tire manufactured from the rubber composition.

First claim

The invention claimed is:

1. A modified and conjugated diene-based polymer comprising a functional group which is derived from an azasilane-based modifier represented by the following Formula 1:

in Formula 1,
R 1 to R 4 are each independently selected from the group consisting of a halogen group, an alkyl group of 1 to 6 carbon atoms and an alkoxy group of 1 to 6 carbon atoms, and
R 5 is a divalent hydrocarbon group of 1 to 10 carbon atoms.

2. The modified and conjugated diene-based polymer of claim 1 , wherein in Formula 1, R 1 to R 4 are each independently selected from the group consisting of a halogen group, an alkyl group of 1 to 3 carbon atoms and an alkoxy group of 1 to 3 carbon atoms, and R 5 is an alkylene group of 1 to 10 carbon atoms.

3. The modified and conjugated diene-based polymer of claim 1 , wherein the azasilane-based modifier is a compound of the following Formula 2 or Formula 3:

4. The modified and conjugated diene-based polymer of claim 1 , wherein the modified and conjugated diene-based polymer has a number average molecular weight of 50,000 g/mol to 2,000,000 g/mol, and a weight average molecular weight of 100,000 g/mol to 4,000,000 g/mol.

5. The modified and conjugated diene-based polymer of claim 1 , wherein the modified and conjugated diene-based polymer has molecular weight distribution of 1.1 to 3.0.

6. The modified and conjugated diene-based polymer of claim 1 , wherein the modified and conjugated diene-based polymer has a mooney viscosity of 40 to 90 at 100° C.

7. The modified and conjugated diene-based polymer of claim 1 , wherein the modified and conjugated diene-based polymer is a homopolymer of conjugated diene-based monomers, or a copolymer of a conjugated diene-based monomer and an aromatic vinyl-based monomer.

8. A method for preparing the modified and conjugated diene-based polymer of claim 1 , the method comprising:
preparing an active polymer combined with an alkali metal by polymerizing conjugated diene-based monomers, or an aromatic vinyl-based monomer and a conjugated diene-based monomer in the presence of an organo-alkali metal compound in a hydrocarbon solvent; and
reacting the active polymer with an azasilane-based modifier represented by the following Formula 1:

in Formula 1,
R 1 to R 4 are each independently selected from the group consisting of a halogen group, an alkyl group of 1 to 6 carbon atoms and an alkoxy group of 1 to 6 carbon atoms, and
R 5 is a divalent hydrocarbon group of 1 to 10 carbon atoms.

9. The method for preparing the modified and conjugated diene-based polymer of claim 8 , wherein the organo-alkali metal compound is used in an amount of 0.1 mmol to 1.0 mmol based on 100 g of a total amount of monomers.

10. The method for preparing the modified and conjugated diene-based polymer of claim 8 , wherein a polar additive is further added during polymerizing.

11. The method for preparing the modified and conjugated diene-based polymer of claim 10 , wherein the polar additive is added in an amount of 0.001 parts by weight to 10 parts by weight based on 100 parts by weight of a total amount of monomers.

12. The method for preparing the modified and conjugated diene-based polymer of claim 8 , wherein the azasilane-based modifier represented by Formula 1 is used in a ratio of 0.1 mol to 2.0 mol with respect to 1 mol of the organo-alkali metal compound.

Assignees

• Lg Chemical Ltd

Inventors

• Lee Ho Young
• Kim No Ma
• Lee Sang Mi
• Chai Da Won

Classifications

• C08F36/06

  Butadiene · CPC title

• C08G77/60

  in which all the silicon atoms are connected by linkages other than oxygen atoms · CPC title

• C08K3/36

  Silica · CPC title

• C08F36/04

  conjugated · CPC title

• C08C19/22

  Incorporating nitrogen atoms into the molecule · CPC title