Tire Sealant Stability via Density Matching
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Solution Overview
Problem
Conventional tire puncture sealants face issues with separation and storage stability, particularly when high amounts of surfactants are used, leading to foaming and degradation in performance.
Innovation Solution
A tire puncture sealant composition comprising a latex or emulsion with 20-65% solids by mass, an anti-freezing agent, and a specific gravity difference within ±0.1 between the solids and the water-anti-freezing agent mixture, which omits or reduces surfactants to prevent separation and maintain dispersion, using natural rubber latex and synthetic resin emulsions to achieve superior storage stability and sealing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If large amounts of surfactant are added to prevent separation of the tire puncture sealant, then the sealant maintains dispersion stability, but the sealant foams after use and post-treatment is impeded
Solution Approach 1:
The patent removes surfactants entirely from the sealant formulation, extracting the harmful component that causes foaming while maintaining dispersion stability through alternative means (specific gravity matching between solids and liquid phase).
Solution Approach 2:
The patent changes the physical parameter of specific gravity to achieve stability. By formulating the sealant so that the specific gravity of solids matches that of the liquid phase within ±0.05, the system achieves dispersion stability without requiring surfactants, thereby eliminating foaming issues.
2Stability of the object's composition
If high amounts of surfactant are used to maintain sealant homogeneity, then separation is prevented, but storage stability deteriorates due to foaming and degradation
Solution Approach 1:
The patent extracts surfactants from the formulation entirely, replacing their homogeneity-maintaining function with a specific gravity matching approach that does not compromise storage stability.
Solution Approach 2:
The patent changes the formulation parameters to achieve specific gravity matching between solids and liquid phase, which maintains homogeneity during storage without the degradation and foaming problems associated with surfactant-based solutions.
3Reliability
If the amount of solids is increased to improve sealing performance, then sealing effectiveness is enhanced, but the specific gravity balance is disrupted causing separation
Solution Approach 1:
The patent changes the specific gravity parameter of the solids component to match the liquid phase, allowing increased solids content for better sealing performance while maintaining separation resistance through gravitational equilibrium.
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 solution provides a tire puncture sealant with enhanced storage stability and sealing performance, preventing separation and foaming, while maintaining the dispersibility of polymer microparticles, thus ensuring effective sealing without the need for high surfactant amounts.
Implementation Method 1
a tire puncture sealant containing a latex and/or an emulsion and an anti-freezing agent
Implementation Method 2
the difference between the specific gravity of the solids and the specific gravity of a mixture of water and anti-freezing agent in the tire puncture sealant being within ±0.1
Data Source
AI summary
A tire puncture sealant according to the present technology is a tire puncture sealant containing a latex and/or an emulsion and an anti-freezing agent, the latex and/or emulsion containing, as solids, at least a polymer and/or an organic compound (other than the polymer), a content of solids being from 20 to 65% by mass with respect to the total mass of the sealant, and the difference between the specific gravity of the solids and the specific gravity of a mixture of water and anti-freezing agent in the tire puncture sealant being within ±0.1.