Rubber Composition for Tires Using Carbon Black Coupling Agents
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Solution Overview
Problem
Conventional rubber compositions for heavy-duty tires face challenges in achieving a balance between low heat generation and crack resistance, particularly in severe conditions, due to limitations in selecting suitable carbon black species and their blend ratios, which affect the durability and performance of the tires.
Innovation Solution
A rubber composition is developed using carbon black with specific particle size distribution (ΔD80 and ΔD10) and carbon black coupling agents like bismaleimide, alkylidene hydrazide, disulfane, and carboxylic hydrazide, which improves dispersion and binding to the polymer, ensuring consistent low heat generation and crack resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If carbon black species is changed to improve heat generation, then heat generation is improved, but durability and crack resistance are lowered
Solution Approach 1:
The invention changes the particle size distribution parameters of carbon black (specifically controlling D10 and D80 values) to achieve optimal balance between heat generation and crack resistance, rather than simply changing carbon black species
Solution Approach 2:
The invention uses a composite approach by combining carbon black with specific coupling agents (silane-modified polymers) to create a multi-component system that achieves both low heat generation and high crack resistance through synergistic effects
2Ease of manufacture
If conventional carbon black blend ratios are used, then manufacturing is simple, but the balance between heat generation and crack resistance is unsatisfactory for heavy-duty vehicles
Solution Approach 1:
The invention establishes specific parameter ranges for carbon black particle size (D10: 0.3-0.6 μm, D80: 0.02-0.08 μm) to systematically achieve optimal performance, replacing trial-and-error selection with defined specifications
Solution Approach 2:
The invention introduces coupling agents as intermediary substances that mediate between carbon black and rubber matrix, improving dispersion and bonding to enhance both heat resistance and crack resistance simultaneously
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a rubber composition with enhanced heat generation and crack resistance balance, suitable for heavy-duty tires, particularly in the soft stiffener parts, by optimizing the particle size distribution and using appropriate carbon black coupling agents to maintain dispersion and binding, resulting in improved durability and performance.
Implementation Method 1
carbon black coupling agents like bismaleimide, alkylidene hydrazide, disulfane, and carboxylic hydrazide, which improves dispersion and binding to the polymer
Implementation Method 2
The heat generation can be improved by the above conventional methods
Data Source
AI summary
Provided is a rubber composition for a tire soft stiffener improved in a crack resistance and a low heat generation, wherein carbon black (A) contained in the rubber shows specific particle size distribution behavior in an aggregate mass distribution curve, and the composition contains at least one compound selected from carbon black coupling agents consisting of bismaleimide (B), alkylidene hydrazide (C), disulfane (D) and carboxylic hydrazide (E), and a heavy-duty tire produced by using the above rubber composition is further provide.