# US 10,246,564 B2 · End-modified conjugated diene polymer and method for preparing the same

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- Number: US 10,246,564 B2
- Document ID: US10246564B2
- Status: Granted
- Kind: B2
- Application number: 15/633,148
- Filed: 2017-06-26
- Published: 2017-10-12
- Granted: 2019-04-02
- Earliest claimed: 2014-11-05
- Assignees: Korea Kumho Petrochemical Co., Ltd.
- Applicants: Korea Kumho Petrochemical Co., Ltd.
- Inventors: Hanjoung Cho; Jae Young Ko; Min Sung Kwon; Dae Hyung Lee; Eun Kyung Noh; Cheol Min Park; Sang Chul Ji
- Web page: https://patentgrep.com/patent/US10246564B2

## CPC

- C08J 3/24: Crosslinking, e.g. vulcanising, of macromolecules (mechanical aspects B29C35/00; crosslinking agents C08K)
- C08C 19/22: Incorporating nitrogen atoms into the molecule
- C08C 19/25: Incorporating silicon atoms into the molecule
- C08C 19/44: of polymers containing metal atoms exclusively at one or both ends of the skeleton
- C08F 236/06: Butadiene
- C08F 236/10: with vinyl-aromatic monomers
- C08K 3/34: Silicon-containing compounds
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- C08C: TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)

## Abstract

One aspect of the present invention provides an end-modified conjugated diene polymer represented by Formula 1 below: wherein p is a conjugated diene polymer chain; R1 to R7 are each independently C1-C20 saturated or unsaturated hydrocarbon chains; X is carbon (C), silicon (Si), or nitrogen (N); a is 1 or 2; and n is an integer of 1 to 200, and a method for preparing the same.

## Claims

### Claim 1

A method for preparing an end-modified conjugated diene polymer, comprising:
(a) polymerizing one or two of a conjugated diene monomer and an aromatic vinyl monomer to form a living polymer in the presence of a solvent, a lewis base, and an organometallic compound; and
(b) reacting the living polymer with a compound represented by Formula 2 below:
to modify an end of the living polymer,
wherein R1 to R8 are each C1-C20 saturated or unsaturated hydrocarbon chains; X is carbon (C), silicon (Si), or nitrogen (N); a is 1; b, c and d are each integers of 0 to 3 satisfying an equation of b+c+d=3; and n is an integer of 1 to 200.

### Claim 2 (depends on 1)

The method of claim 1, wherein the organometallic compound is used in an amount of 0.01 mmol to 10 mmol with respect to 100 g of the monomer.

### Claim 3 (depends on 2)

The method of claim 2, wherein the organometallic compound is at least one selected from the group consisting of an organolithium compound, an organosodium compound, an organopotassium compound, an organorubidium compound, and an organocesium compound.

### Claim 4 (depends on 2)

The method of claim 2, wherein a molar ratio of the organometallic compound to the compound represented by the Formula 2 above is 1:0.5 to 1:3.0.