Modified Rubber Silica Dispersion Breaking Strength
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Solution Overview
Problem
Current rubber compositions for tires, particularly those using inorganic fillers like silica, face challenges in enhancing low loss characteristics and breaking strength due to agglomeration issues and limited affinity between rubber and fillers, which affects rolling resistance and fuel efficiency.
Innovation Solution
A modified rubber is developed by modifying natural or synthetic rubber with a compound having a specific structure, such as an aminoguanidine salt, which enhances the affinity for inorganic fillers like silica, improving dispersibility and adhesion, and is combined with a silane coupling agent in a rubber composition to achieve better low loss characteristics and breaking strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If inorganic filler (silica) is used to enhance reinforcing effect and low loss characteristics, then breaking strength and low loss characteristics are improved, but the filler agglomerates due to low affinity with hydrophobic rubber
Solution Approach 1:
The patent modifies the chemical parameters of the rubber by introducing polar groups through oxidation and hydrazide compound treatment, changing the surface properties from hydrophobic to hydrophilic to enhance affinity with silica filler
Solution Approach 2:
The patent uses silane coupling agent as an intermediary substance that bridges the rubber and silica filler, improving the interface bonding and dispersibility of the filler in the rubber matrix
2Loss of energy
If inorganic filler is used to obtain low exothermicity, then low loss characteristics are improved, but rolling resistance reduction is insufficient
Solution Approach 1:
The patent optimizes the chemical composition parameters by introducing specific polar groups and using silane coupling agents to enhance the rubber-filler interaction, thereby reducing energy loss and improving fuel efficiency
3Strength
If natural rubber is oxidized and modified with hydrazide compound to introduce polar group, then affinity for inorganic filler is enhanced, but the modification process complexity increases
Solution Approach 1:
The patent performs preliminary oxidation of natural rubber before adding the hydrazide compound, preparing the rubber surface in advance to facilitate subsequent modification and filler affinity enhancement
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 modified rubber composition results in tires with improved low loss characteristics and breaking strength, reducing rolling resistance and enhancing fuel efficiency while maintaining processability.
Implementation Method 1
modifying a natural rubber and/or a synthetic rubber with a compound having a specific structure, such as an aminoguanidine salt, which enhances the affinity for inorganic fillers like silica
Implementation Method 2
combined with a silane coupling agent in a rubber composition to achieve better low loss characteristics and breaking strength
Data Source
AI summary
Provided is a modified rubber for a tire (A) obtained by modifying a natural rubber and/or a synthetic rubber with a compound represented by formula (1):wherein X is an acid to form a salt with a guanidine site.