Rubber Composition Durability Vibration Insulation Trade-off
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Solution Overview
Problem
Conventional rubber compositions face a trade-off between enhancing durability and maintaining vibration insulating properties, where improving one property typically compromises the other.
Innovation Solution
A rubber composition comprising a solid rubber, a liquid diene rubber, a silane coupling agent, and silica with specific properties, which are cross-linked to produce cured products with enhanced durability and vibration insulating properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional rubber compositions use high filler content to enhance durability, then durability is improved, but vibration insulating properties deteriorate
Solution Approach 1:
The patent uses a composite filler system combining silica particles with specific surface area (15-250 m²/g) and carbon black, along with silane coupling agents, to create a multi-component reinforcement system. This composite approach allows simultaneous achievement of durability (through strong filler-rubber interaction) and vibration insulation (through optimized filler network structure), resolving the trade-off between these properties.
Solution Approach 2:
The patent optimizes the surface area parameter of silica filler within a specific range (15-250 m²/g) to balance durability and vibration insulation. By controlling this critical parameter along with filler content and silane coupling agent ratios, the composition achieves both high durability and excellent vibration insulating properties without the conventional trade-off.
2Object-generated harmful factors
If rubber composition is formulated for high vibration insulation, then vibration insulating properties are improved, but durability deteriorates
Solution Approach 1:
The silane coupling agent acts as an intermediary substance that chemically bonds silica filler particles to the rubber matrix. This intermediary connection ensures strong adhesion, maintaining durability while allowing the filler network to provide vibration insulation. The coupling agent prevents filler aggregation and ensures stress transfer, resolving the contradiction between vibration insulation and durability.
3Strength
If silica with high surface area is used to enhance strength, then mechanical strength is improved, but vibration insulation deteriorates
Solution Approach 1:
The patent specifies a broad surface area range for silica (15-250 m²/g) rather than maximizing it. This parameter optimization allows selection of silica with appropriate surface characteristics to achieve both mechanical strength through filler-rubber interaction and vibration insulation through controlled filler networking, avoiding the trade-off associated with high surface area silica alone.
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 described rubber composition achieves cured products with superior durability and vibration insulating properties, making them suitable for applications such as rubber vibration insulators.
Implementation Method 1
the composition includes a product formed by covalent bonding of the liquid diene rubber (B) and at least part of the silane coupling agent (C)
Implementation Method 2
a rubber composition capable of giving cured products excellent in durability and vibration insulating properties through crosslinking
Data Source
AI summary
The present invention provides a rubber composition capable of giving cured products excellent in durability and vibration insulating properties. The present invention also provides a cured product of the composition, and a rubber vibration insulator using the cured product. The rubber composition includes a solid rubber (A), a liquid diene rubber (B), a silane coupling agent (C), and silica (D) having a BET specific surface area of 15 to 250 m2/g.