Rubber Composition with Epoxy Dipolar Compound
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Solution Overview
Problem
Rubber compositions reinforced with silica or carbon black face a trade-off between improved dispersion, which reduces cured rigidity, and the need for limited plasticizer addition, limiting tire performance variability.
Innovation Solution
Incorporating a 1,3-dipolar compound with an epoxy group into the rubber composition, which enhances filler dispersion while maintaining a balance between cured rigidity and hysteresis, allowing for improved reinforcement and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the dispersion of silica or carbon black is improved in the rubber composition, then the reinforcing properties are enhanced, but the cured rigidity decreases
Solution Approach 1:
The invention changes the chemical composition parameters of the rubber compound by introducing a 1,3-dipolar compound with epoxy group. This compound modifies the interaction between filler particles and rubber matrix, enabling improved dispersion while maintaining rigidity through chemical bonding mechanisms rather than physical mixing alone.
Solution Approach 2:
The invention creates a composite system combining diene elastomer, silica or carbon black filler, and 1,3-dipolar compound with epoxy group. This multi-component composite achieves synergistic effects where the dipolar compound acts as a coupling agent between filler and rubber, simultaneously improving dispersion and preserving mechanical properties.
2Stress or pressure
If the amount of plasticizer added to the rubber composition is limited to maintain cured rigidity, then the reinforcing properties are preserved, but the flexibility in tire performance formulation is reduced
Solution Approach 1:
The invention changes the formulation approach by replacing plasticizer-based rigidity adjustment with a chemical coupling mechanism. The 1,3-dipolar compound with epoxy group provides rigidity through chemical bonding, freeing up plasticizer usage for other performance optimizations and restoring formulation flexibility.
3Strength
If a 1,3-dipolar compound with epoxy group is added to improve filler dispersion, then the reinforcing properties are enhanced while cured rigidity is maintained, but the formulation complexity increases
Solution Approach 1:
The 1,3-dipolar compound with epoxy group serves multiple functions simultaneously: it acts as a dispersing agent for filler particles, a coupling agent between filler and rubber matrix, and a reinforcement promoter. This multi-functionality reduces the need for multiple separate additives, actually simplifying the overall formulation despite the specialized nature of the compound.
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 use of a 1,3-dipolar compound with an epoxy group in rubber compositions reinforced with silica or carbon black improves filler dispersion, maintaining rigidity and hysteresis properties, thus enhancing tire performance and flexibility in formulation.
Implementation Method 1
a 1,3-dipolar compound comprising an epoxy group
Implementation Method 2
a vulcanization system
Data Source
AI summary
The present invention relates to a rubber composition based on at least one diene elastomer, a 1,3-dipolar compound comprising an epoxide group, a reinforcing filler comprising a silica or a carbon black and a vulcanization system. A rubber composition of this kind exhibits improved dispersion of the silica or the carbon black as well as a good compromise in terms of the properties consisting of the rigidity in the cured state, the hysteresis and the reinforcement.