RUBBER COMPOSITION AND PNEUMATIC TIRE FORMED FROM SAID RUBBER COMPOSITION

• US 20170137599A1
• Filed: 10/19/2016
• Published: 05/18/2017
• Est. Priority Date: 11/12/2015
• Status: Active Grant

• Current Assignee: Sumitomo Rubber Industries Limited
• Original Assignee: Sumitomo Rubber Industries Limited
• Inventors: OSHIMO, Masaki, HABA, Toshifumi, WATANABE, Kenya
• Granted Patent: US 9,873,775 B2
• Time in Patent Office: Days
• CPC Class Codes: B60C 1/00 Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
• CPC Class Codes: B60C 1/0016 Compositions of the tread
• CPC Class Codes: C08F 2/24 with the aid of emulsifying agents
• CPC Class Codes: C08F 236/06 Butadiene
• CPC Class Codes: C08F 236/10 with vinyl-aromatic monomers
• CPC Class Codes: C08F 236/22 the radical having three or more carbon-to-carbon double bonds
• CPC Class Codes: C08K 3/04 Carbon
• CPC Class Codes: C08K 3/36 Silica
• CPC Class Codes: C08L 15/00 Compositions of rubber derivatives C08L11/00, C08L13/00 take precedence
• CPC Class Codes: C08L 47/00 Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds; Compositions of derivatives of such polymers C08L45/00 takes precedence; of conjugated diene rubbers C08L9/00 - C08L21/00
• CPC Class Codes: C08L 9/00 Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
• CPC Class Codes: C08L 9/06 Copolymers with styrene

Abstract

Provided are a rubber composition that shows a balanced improvement in fuel economy and abrasion resistance while having good processability, and a pneumatic tire formed from the rubber composition. The present invention relates to a rubber composition containing: a rubber component including a copolymer containing a structural unit derived from a conjugated diene monomer, a structural unit derived from farnesene, and a structural unit derived from a compound represented by the formula (1) below; and carbon black and/or silica,

wherein R¹¹ and R¹² are the same as or different from each other and each represent a hydrogen atom or a C1-C30 hydrocarbon group.

Claims

1. A pneumatic tire, formed from a rubber composition, the rubber composition comprising:

a rubber component including a copolymer comprising a structural unit derived from a conjugated diene monomer, a structural unit derived from farnesene, and a structural unit derived from a compound represented by the formula (1) below; and

at least one of carbon black or silica,

2. The pneumatic tire according to claim 1,

wherein the copolymer comprises, per 100% by mass of structural units of the copolymer, 10% to 50% by mass of the structural unit derived from a conjugated diene monomer, 20% to 60% by mass of the structural unit derived from farnesene, and 10% to 30% by mass of the structural unit derived from a compound of formula (1).

3. The pneumatic tire according to claim 1,

wherein the copolymer has a weight average molecular weight of 5,000 to 2,000,000 and a molecular weight distribution of 2.1 to 11.

4. The pneumatic tire according to claim 1,

wherein R¹¹ and R¹² are ethyl groups.

5. The pneumatic tire according to claim 1,

wherein the conjugated diene monomer is 1,3-butadiene.

6. The pneumatic tire according to claim 1,

wherein the copolymer further comprises a structural unit derived from a compound represented by the formula (2) below in an amount of 1% to 20% by mass per 100% by mass of structural units of the copolymer,