Rubber composition and heavy-duty tire using the same
A tailored rubber composition with isoprene-based rubber, carbon black, silica, and resin, optimized for a specific tanδ curve, addresses the challenges of abrasion, chipping, and heat generation in heavy-duty tires, enhancing performance and compliance with regulatory standards.
JP2026107246APending Publication Date: 2026-06-30THE YOKOHAMA RUBBER CO LTD
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- THE YOKOHAMA RUBBER CO LTD
- Filing Date
- 2024-12-18
- Publication Date
- 2026-06-30
AI Technical Summary
Technical Problem
Existing rubber compositions for heavy-duty tires fail to simultaneously enhance abrasion resistance, chipping resistance, and reduce heat generation, while also meeting the demands of lower rolling resistance and stricter regulatory standards.
Method used
A rubber composition is formulated with specific amounts of isoprene-based rubber, carbon black, silica, and resin, achieving a tanδ curve that satisfies the conditions 2.0℃≦T1-T0≦7.0℃ and 0.55 ≤ P1 - P100 ≤ 0.90, with a silica-to-resin ratio of 1:9 to 9:1.
Benefits of technology
The composition improves abrasion resistance, maintains chipping resistance, and reduces heat generation, making it suitable for heavy-duty tires under demanding conditions.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure 2026107246000001_ABST
Abstract
Construction vehicles operate for long periods under heavy loads, so they require features that suppress heat generation and improve wear resistance. [Solution] A rubber composition satisfying formulas (1) and (2), wherein, per 100 parts by mass of a rubber component containing 50% or more isoprene-based rubber, the total amount of carbon black and silica is 40 to 65 parts by mass, the total amount of silica and resin is 30 parts by mass or less, and the ratio of silica to resin is 1:9 to 9:1. 2.0℃≦T1-T0≦7.0℃ (1) (T1 is the peak temperature of the tanδ curve of the rubber composition, T0 is the peak temperature of the tanδ curve of the rubber composition without resin), 0.55≦P1-P 100 ≤0.90 (2) (P1 is the peak tanδ value of the tanδ curve of the rubber composition, P 100 (This refers to the tanδ value of the rubber composition at 100°C.)
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