Inverse Vulcanized Rubber Composition for Tire Breaking Strength
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Solution Overview
Problem
Existing rubber compositions lack sufficient breaking strength, which is essential for improving durability, particularly in pneumatic tires, despite advancements in abrasion and chipping resistance.
Innovation Solution
Incorporating an inverse vulcanizate with a glass transition point of 60° C. or lower, obtained by reacting sulfur with organic compounds like limonene and dicyclopentadiene, to enhance crosslinking and dispersion within the rubber composition, thereby improving breaking strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sulfur-containing polymer or sulfur-containing oligomer is used to improve abrasion resistance and chipping resistance, then abrasion resistance and chipping resistance are improved, but breaking strength is insufficient
Solution Approach 1:
The patent changes the molecular structure parameter of the crosslinking agent by using inverse vulcanizate with specific glass transition temperature (60°C or lower) and specific sulfur content (30-90 mass%), which fundamentally alters the crosslinking mechanism to achieve both high breaking strength and good abrasion resistance simultaneously
Solution Approach 2:
The patent creates a composite crosslinking system combining inverse vulcanizate with specific physical properties (low glass transition temperature, high sulfur content) with the rubber base polymer, achieving synergistic effects that resolve the contradiction between durability and breaking strength
2Ease of manufacture
If conventional vulcanization agents are used to achieve good processing properties, then processing properties are improved, but breaking strength and durability are insufficient
Solution Approach 1:
The patent changes the glass transition temperature parameter of the crosslinking agent to 60°C or lower, which ensures the inverse vulcanizate remains flexible and processable at manufacturing temperatures while providing superior breaking strength in the final product
Solution Approach 2:
The inverse vulcanizate acts as an intermediary crosslinking agent that bridges the gap between processing requirements and final strength requirements, enabling both good processing properties and high breaking strength
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 rubber composition achieves excellent breaking strength, improved flexibility, and reduced migration properties, making it suitable for durable pneumatic tires with enhanced performance.
Implementation Method 1
A rubber composition according to the invention contains an inverse vulcanizate having a glass transition point of 60° C. or lower. The above inverse vulcanizate may be obtained by reacting sulfur and an organic compound containing a hydrocarbon having two or more unsaturated bonds.
Implementation Method 2
Incorporating an inverse vulcanizate with a glass transition point of 60° C. or lower, obtained by reacting sulfur with organic compounds like limonene and dicyclopentadiene, to enhance crosslinking and dispersion within the rubber composition
Data Source
AI summary
Provided is a rubber composition having excellent breaking strength. The rubber composition contains an inverse vulcanizate having a glass transition temperature of 60° C. or lower.