Partially Saturated Elastomer Rubber Composition for Tire Tread
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Solution Overview
Problem
Tire manufacturers face challenges in achieving a balance between rolling resistance, wet performance, tear, and tensile properties, as improving one property often compromises others, particularly in tire tread rubber compositions.
Innovation Solution
A sulfur vulcanizable rubber composition is developed, comprising partially saturated elastomers, aluminum hydroxide, and specific fillers like silica, which improves rolling resistance and wet performance while maintaining advanced tensile and tear properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional tire tread rubber compositions are used to improve tensile and tear properties, then rolling resistance increases, but wet performance deteriorates
Solution Approach 1:
The patent changes the chemical composition parameters by using partially saturated elastomers with controlled double bond content (at most 15% of repeat units) and specific aluminum hydroxide content (at least 5 phr), achieving improved wet performance while maintaining tensile and tear properties without increasing rolling resistance
Solution Approach 2:
The patent creates a composite rubber composition combining partially saturated elastomers with aluminum hydroxide and silica fillers, where the synergistic interaction between these components achieves balanced performance in wet traction, tensile strength, tear resistance, and rolling resistance
2Loss of energy
If rolling resistance is reduced in tire tread compositions, then wet performance may improve, but tensile and tear properties deteriorate
Solution Approach 1:
The patent optimizes the double bond content parameter in the elastomer (at most 15% of repeat units) and aluminum hydroxide content (at least 5 phr) to achieve low rolling resistance while simultaneously maintaining high tensile and tear properties through controlled crosslinking density
3Object-affected harmful factors
If wet performance is improved in tire tread compositions, then rolling resistance may increase, but abrasion resistance deteriorates
Solution Approach 1:
The patent adjusts the composition parameters including partially saturated elastomer with controlled double bond content and aluminum hydroxide content to achieve improved wet performance while maintaining reasonable abrasion resistance through optimized material properties
Solution Approach 2:
The patent uses a composite system of partially saturated elastomers, aluminum hydroxide, and silica that provides both improved wet performance and maintained abrasion resistance through the synergistic effects of the composite components
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 composition achieves a balanced performance in rolling resistance, wet traction, and tensile strength, with acceptable treadwear, enhancing overall tire performance.
Implementation Method 1
at least 5 phr of aluminum hydroxide
Implementation Method 2
40 phr to 200 phr of at least one filler; said filler comprises one or more of: from 35 phr to 190 phr of silica
Implementation Method 3
sulfur vulcanizable rubber composition
Data Source
AI summary
The present invention is directed to a rubber composition comprising 10 phr to 100 phr of at least one partially saturated elastomer comprising repeat units, wherein at most 15% of all repeat units of the elastomer comprise a double bond; 0 phr to 90 phr of at least one diene based elastomer; 40 phr to 200 phr of at least one filler; and at least 5 phr of aluminum hydroxide.