Rubber Compound with Dual Vulcanization System
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Solution Overview
Problem
Existing rubber compounds face a challenge in reducing rolling resistance without compromising mechanical characteristics, particularly tensile strength, when the quantity of reinforcing filler is reduced, and existing vulcanization systems either prioritize long-term stability or production flexibility at the expense of other properties.
Innovation Solution
A rubber compound comprising a cross-linkable polymer base, a reinforcing filler, and a vulcanization system that includes both sulphur and an organic peroxide chemical, along with a reinforcing resin, which allows for a reduction in reinforcing filler quantity without deteriorating mechanical characteristics and enhances long-term stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the quantity of reinforcing filler is reduced to improve rolling resistance, then rolling resistance is improved, but mechanical characteristics such as tensile strength deteriorate
Solution Approach 1:
The invention changes the chemical composition parameters of the vulcanization system by introducing a specific combination of sulphur (0.5-5 phr) and organic peroxide (0.1-5 phr), along with corresponding accelerators and activators. This parameter change enables the compound to achieve both low rolling resistance and high mechanical strength by optimizing the cross-linking mechanism rather than simply increasing filler content.
Solution Approach 2:
The invention uses a composite vulcanization system combining two different vulcanizing agents (sulphur and organic peroxide) with complementary mechanisms. The sulphur provides traditional cross-linking while the peroxide creates carbon-carbon cross-links, creating a synergistic effect that simultaneously improves mechanical strength and reduces rolling resistance without requiring high filler quantities.
2Stability of the object's composition
If peroxide-based vulcanization systems or Efficient Vulcanization systems are used to improve long-term thermal and mechanical stability, then long-term stability is improved, but fatigue resistance and process flexibility deteriorate
Solution Approach 1:
The invention merges two different vulcanization systems (CV and EV) into a single dual-vulcanization system. By combining sulphur-based cross-linking (which provides fatigue resistance and flexibility) with peroxide-based cross-linking (which provides thermal and mechanical stability), the compound achieves a balanced performance that resolves the contradiction between long-term stability and fatigue resistance.
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 combination of a reinforcing resin and a vulcanization system with sulphur and organic peroxide chemical improves rolling resistance and maintains mechanical properties, while significantly enhancing long-term stability, as demonstrated by experimental tests showing improved hysteresis and toughness values even after ageing.
Implementation Method 1
the vulcanization system comprises at least sulphur and an organic peroxide chemical
Implementation Method 2
a vulcanization system; said compound being characterised in that it comprises a reinforcing resin and in that said vulcanization system comprises at least sulphur and an organic peroxide chemical
Implementation Method 3
a reinforcing filler and a vulcanization system; said compound being characterised in that it comprises a reinforcing resin
Data Source
AI summary
A rubber compound for tyres comprising at least a cross-linkable polymer base, a reinforcing filler, a reinforcing resin and a vulcanization system comprising at least sulphur and an organic peroxide chemical.