Conjugated diene polymer and conjugated diene polymer composition

• US 10,184,020 B2
• Filed: 09/09/2015
• Issued: 01/22/2019
• Est. Priority Date: 09/10/2014
• Status: Active Grant

• Current Assignee: Sumitomo Chemical Company Limited
• Original Assignee: Sumitomo Chemical Company Limited
• Inventors: Tajima, Koichiro
• Primary Examiner(s): Harlan, Robert D.
• Application Number:
  US15/509,733
• Publication Number:
  US 20170260311A1
• Time in Patent Office: 1,231 Days
• CPC Class Codes: C08C 19/22 Incorporating nitrogen atoms into the molecule
• CPC Class Codes: C08C 19/25 Incorporating silicon atoms into the molecule
• CPC Class Codes: C08C 19/44 of polymers containing metal atoms exclusively at one or both ends of the skeleton
• CPC Class Codes: C08F 2/06 Organic solvent
• CPC Class Codes: C08F 212/08 Styrene
• CPC Class Codes: C08F 236/06 Butadiene
• CPC Class Codes: C08F 236/10 with vinyl-aromatic monomers
• CPC Class Codes: C08F 236/20 unconjugated
• CPC Class Codes: C08F 8/00 Chemical modification by after-treatment graft polymers, block polymers, crosslinking with unsaturated monomers or with polymers C08F251/00 - C08F299/00; of conjugated diene rubbers C08C
• CPC Class Codes: C08K 3/04 Carbon
• CPC Class Codes: C08K 3/06 Sulfur
• CPC Class Codes: C08K 3/22 of metals
• CPC Class Codes: C08K 3/36 Silica
• CPC Class Codes: C08K 5/09 Carboxylic acids; Metal salts thereof; Anhydrides thereof
• CPC Class Codes: C08K 5/18 with aromatically bound amino groups
• CPC Class Codes: C08K 5/47 Thiazoles
• CPC Class Codes: C08K 5/548 containing sulfur C08K5/5477 takes precedence
• CPC Class Codes: C08L 15/00 Compositions of rubber derivatives C08L11/00, C08L13/00 take precedence
• CPC Class Codes: C08L 9/06 Copolymers with styrene
• CPC Class Codes: C08L 91/00 Compositions of oils, fats or waxes; Compositions of derivatives thereof
• CPC Class Codes: C08L 91/06 : Waxes

Abstract

Disclosed is a conjugated diene polymer obtained by a polymerization reaction in a polymerization solution comprising a conjugated diene, a compound represented by the following formula (1) or formula (2), and an organoalkali metal compound as a polymerization initiator:

wherein R¹⁰² in formula (1) represents an alkenyl group having 2 or more and 10 or less carbon atoms.

Claims

1. A conjugated diene polymer obtained by a polymerization reaction in a polymerization solution comprising a conjugated diene;

a compound represented by the following formula (1) or formula (2), and an organoalkali metal compound as a polymerization initiator;

2. The conjugated diene polymer according to claim 1, having a modifying group bonded to a molecular chain terminal of the conjugated diene polymer, the modifying group being derived from an alkoxysilane compound, a halogen-containing silicon compound, a ketone compound, or a tin compound.

3. The conjugated diene polymer according to claim 1, wherein, when Mw is a weight average molecular weight of the conjugated diene polymer, Mn is a number average molecular weight of the conjugated diene polymer, and the weight average molecular weight and the number average molecular weight are values in terms of polystyrene by gel permeation chromatography, Mw is 50000 or more and 2000000 or less, and Mw/Mn is 1.0 or more and 1.5 or less.

4. A conjugated diene polymer composition comprising:

the conjugated diene polymer according to claim 1; and

a reinforcing agent,

a content of the reinforcing agent being 10 parts by mass or more and 150 parts by mass or less per 100 parts by mass of the conjugated diene polymer.

5. A method for manufacturing a conjugated diene polymer, comprising:

a step of producing the conjugated diene polymer by a polymerization reaction in a polymerization solution comprising a conjugated diene, a compound represented by the following formula (1) or formula (2), and an organoalkali metal compound as a polymerization initiator;

6. The method according to claim 5, further comprising a step of introducing a modifying group derived from an alkoxysilane compound, a halogen-containing silicon compound, a ketone compound, or a tin compound into a terminal of the polymer produced by the polymerization reaction.

7. The method according to claim 5, wherein, when Mw is a weight average molecular weight of the conjugated diene polymer, Mn is a number average molecular weight of the conjugated diene polymer, and the weight average molecular weight and the number average molecular weight are values in terms of polystyrene by gel permeation chromatography, Mw is 50000 or more and 2000000 or less, and Mw/Mn is 1.0 or more and 1.5 or less.