HEAVY DUTY PNEUMATIC TIRE

• US 20200131346A1
• Filed: 10/09/2019
• Published: 04/30/2020
• Est. Priority Date: 10/24/2018
• Status: Active Grant

• Current Assignee: Sumitomo Rubber Industries Limited
• Original Assignee: Sumitomo Rubber Industries Limited
• Inventors: HIMEDA, Shingo
• Granted Patent: US 11,299,605 B2
• Time in Patent Office: Days
• CPC Class Codes: B60C 1/0016 Compositions of the tread
• CPC Class Codes: B60C 11/0008 characterised by the tread rubber
• CPC Class Codes: B60C 11/0306 Patterns comprising block rows or discontinuous ribs
• CPC Class Codes: B60C 11/033 by the void or net-to-gross ratios of the patterns
• CPC Class Codes: B60C 2011/0016 Physical properties or dimensions
• CPC Class Codes: B60C 2011/0372 with particular inclination angles
• CPC Class Codes: B60C 2200/06 for heavy duty vehicles
• 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 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: C08L 2205/025 containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
• CPC Class Codes: C08L 2205/03 containing three or more polymers in a blend
• CPC Class Codes: C08L 7/00 Compositions of natural rubber
• CPC Class Codes: C08L 9/00 Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
• 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
• CPC Class Codes: Y02T 10/86 : Optimisation of rolling resistance, e.g. weight reduction

Abstract

Provided is a heavy duty pneumatic tire having excellent abrasion resistance. The heavy duty pneumatic tire includes a tread portion including a rubber composition containing: an isoprene rubber; a butadiene rubber; a styrene-butadiene rubber; and a carbon black having an average particle size of 20 nm or less and/or a cetyltrimethylammonium bromide adsorption specific surface area of 130 m²/g or more, the tread portion having a land ratio of 81% or higher.

Claims

1. A heavy duty pneumatic tire, comprising a tread portion,

the tread portion comprising a rubber composition containing:

an isoprene rubber;

a butadiene rubber;

a styrene-butadiene rubber; and

a carbon black having at least one of an average particle size of 20 nm or less or a cetyltrimethylammonium bromide adsorption specific surface area of 130 m²/g or more,

the tread portion having a land ratio of 81% or higher.

2. The heavy duty pneumatic tire according to claim 1, wherein the rubber composition further contains a carbon black having at least one of an average particle size of more than 20 nm but not more than 25 nm or a cetyltrimethylammonium bromide adsorption specific surface area of at least 100 m²/g but less than 130 m²/g.

3. The heavy duty pneumatic tire according to claim 1, wherein the rubber composition has a total styrene content of 2.0 to 11.0% by mass based on 100% by mass of a rubber component in the rubber composition.

4. The heavy duty pneumatic tire according to claim 1, wherein the rubber composition has an abrasion resistance index of 140 or higher.