Tire Sealant Chelating Agent Injectability
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Solution Overview
Problem
The existing tire sealants face challenges with injectability, as the dispersion of natural rubber becomes unstable during injection, potentially due to polyvalent cations inhibiting surfactant function, leading to poor performance in puncture repair kits.
Innovation Solution
Incorporating a chelating agent, such as an amino carboxylic acid-based compound like ethylenediamine tetraacetic acid, at a content of 0.1 mass % or greater in the tire sealant to stabilize natural rubber dispersion and enhance injectability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a tire sealant containing natural rubber latex and synthetic resin emulsion is used, then puncture sealing capability is improved, but injectability deteriorates due to unstable natural rubber dispersion
Solution Approach 1:
A chelating agent is introduced as an intermediary substance to mediate between the natural rubber latex and the surfactant. The chelating agent binds polyvalent cations that would otherwise inhibit surfactant function, thereby restoring the surfactant's ability to stabilize the natural rubber dispersion and improve injectability while maintaining sealing capability
Solution Approach 2:
The chemical composition parameters of the tire sealant are modified by adding a chelating agent at a specific concentration range (0.01-5 mass% based on total sealant mass). This parameter change alters the chemical environment to prevent surfactant inhibition, thereby improving dispersion stability and injectability
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 sealant with a chelating agent exhibits excellent injectability and puncture seal performance, allowing efficient sealing of tire punctures, as demonstrated by improved injection times and sealing distances.
Implementation Method 1
a tire sealant including: a natural rubber latex; a synthetic resin emulsion; an anti-freezing agent; a surfactant; and a chelating agent, wherein a content of the chelating agent is 0.1 mass % or greater
Data Source
AI summary
An object of the present invention is to provide a tire sealant and a tire repair kit that exhibit excellent injectability. Provided is a tire sealant including a natural rubber latex, a synthetic resin emulsion, an anti-freezing agent, a surfactant, and a chelating agent, wherein the content of the chelating agent is 0.1 mass % or greater.