Silica-Coupled Tire Rubber Composition for Wear and Wet Grip
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Solution Overview
Problem
The existing rubber composition for tires has poor processability and fails to meet modern standards for wear resistance and wet performance, leading to a trade-off between energy efficiency and gripping force in pneumatic tires.
Innovation Solution
A rubber composition comprising diene rubber with specific conjugated diene rubber, silica with a predetermined CTAB adsorption specific surface area, and a silane coupling agent, which enhances the interaction between the rubber and silica, improving processability and reinforcing the tire's wear resistance and wet performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional rubber composition is used, then manufacturing simplicity is maintained, but processability deteriorates and performance (wear resistance and wet performance) is insufficient
Solution Approach 1:
The patent applies parameter changes by precisely controlling the glass transition temperature (not lower than -40°C) and the specific composition ratios of copolymer rubber components. By adjusting these physical and chemical parameters within defined ranges, the invention achieves optimal balance between processability and performance characteristics such as wear resistance and wet performance.
Solution Approach 2:
The invention uses composite materials by combining copolymer rubber obtained by copolymerizing 1,3-butadiene and styrene with other diene rubber in specific ratios (not less than 50 wt.% copolymer rubber and not greater than 50 wt.% other diene rubber). This composite approach allows the material to exhibit both good processability and enhanced wear resistance and wet performance.
2Duration of action of stationary object
If silica and carbon black are added to improve wear resistance, then durability is enhanced, but processing complexity increases
Solution Approach 1:
The patent applies parameter changes by precisely controlling the glass transition temperature (not lower than -40°C) and the specific composition ratios of copolymer rubber components. By adjusting these physical and chemical parameters within defined ranges, the invention achieves optimal balance between processability and performance characteristics such as wear resistance and wet performance.
Solution Approach 2:
The invention uses composite materials by combining copolymer rubber obtained by copolymerizing 1,3-butadiene and styrene with other diene rubber in specific ratios (not less than 50 wt.% copolymer rubber and not greater than 50 wt.% other diene rubber). This composite approach allows the material to exhibit both good processability and enhanced wear resistance and wet performance.
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 excellent processability and manufacturing of tires with enhanced wear resistance and wet performance, balancing energy efficiency and gripping force.
Implementation Method 1
a silane coupling agent represented by Formula (2) below... the silane coupling agent (C) is a silane coupling agent represented by Formula (2) below... which enhances the interaction between the rubber and silica
Implementation Method 2
a CTAB (cetyltrimethylammonium bromide) adsorption specific surface area of from 160 to 300 m2/g... a CTAB adsorption specific surface area of the silica (B) is from 180 to 250 m2/g
Data Source
AI summary
A rubber composition of the present technology contains: diene rubber (A) containing a predetermined amount of specific conjugated diene rubber represented by a predetermined formula; silica having a CTAB adsorption specific surface area in a predetermined range; and a silane coupling agent represented by a predetermined formula.