Tire Rubber Composition Using Microparticle Composite
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Solution Overview
Problem
Current tire rubber compositions struggle to enhance wet grip performance and low rolling resistance while maintaining or improving mechanical properties such as tensile stress, tensile strength at break, and tensile elongation at break.
Innovation Solution
A tire rubber composition is developed that includes a microparticle composite formed from a sulfur vulcanizable rubber and an emulsion of organic microparticles, which are obtained by polymerizing and/or crosslinking polymerizable monomers, oligomers, and polymers with reactive functional groups in water, resulting in enhanced wet grip and low rolling resistance while maintaining or improving mechanical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If three-dimensionally crosslinked microparticles are blended to enhance wear resistance and ice performance, then wear resistance is improved, but wet grip performance and rolling resistance cannot be enhanced
Solution Approach 1:
The patent uses composite microparticles consisting of a core shell structure where a silane crosslinked polymer forms the core and a sulfur vulcanizable rubber forms the shell. This composite structure allows the core to provide wear resistance and ice performance while the shell provides wet grip performance and low rolling resistance, resolving the contradiction between wear resistance and wet grip performance.
Solution Approach 2:
The microparticles have different properties in different regions: the core has high crosslinking density for wear resistance, while the shell has sulfur vulcanization for wet grip. This local differentiation of material properties allows each region to contribute its specific function, solving the contradiction between wear resistance and wet grip performance.
2Reliability
If three-dimensionally crosslinked microparticles are blended to enhance ice performance, then ice performance is improved, but mechanical properties such as tensile strength and elongation cannot be enhanced
Solution Approach 1:
The composite microparticle structure with silane crosslinked core and sulfur vulcanizable rubber shell allows the core to provide ice performance while the shell provides tensile strength and elongation, resolving the contradiction between ice performance and mechanical properties.
Solution Approach 2:
The core region provides ice performance through silane crosslinking while the shell region provides tensile strength through sulfur vulcanization, allowing each region to optimize its local function without compromising the other.
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 tire rubber composition achieves superior wear resistance, durability, wet grip performance, and low rolling resistance, maintaining or enhancing mechanical properties like tensile stress, tensile strength at break, and tensile elongation at break.
Implementation Method 1
an emulsion containing a microparticle obtained by polymerizing and/or crosslinking at least one selected from the group consisting of polymerizable monomers, and oligomers, prepolymers, and polymers having a reactive functional group and having a molecular weight from 500 to 50000 simultaneously or stepwise in water
Implementation Method 2
a microparticle composite in a sulfur vulcanizable rubber
Data Source
AI summary
The present technology provides a tire rubber composition formed by blending a microparticle composite, which is formed from a solid component of a mixture containing an emulsion of an organic microparticle and a rubber latex, in a sulfur vulcanizable rubber; the emulsion of the organic microparticle being an emulsion containing a microparticle obtained by polymerizing and/or crosslinking at least one selected from the group consisting of polymerizable monomers, and oligomers, prepolymers, and polymers having a reactive functional group and having a molecular weight from 500 to 50000 simultaneously or stepwise in water; and an average particle size of the microparticle being from 0.001 to 100 μm.