Tire Puncture Sealing Agent Viscosity and Foaming Control
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Solution Overview
Problem
Tire puncture sealing agents with reduced liquid amounts fail to maintain satisfactory sealing properties, especially at low temperatures, despite having excellent freeze resistance.
Innovation Solution
A tire puncture sealing agent composition that includes a rubber latex and/or resin emulsion, a specific glycol ether, and a sulfate ester salt surfactant, with the glycol ether content between 70 to 300 parts by mass per 100 parts of solid content, and the surfactant content between 3 to 20 parts by mass, which lowers viscosity and enhances foaming for improved sealing in reduced liquid amounts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the liquid amount of tire puncture sealing agent is reduced, then the puncture repair kit size is reduced, but the sealing properties become insufficient
Solution Approach 1:
The patent changes the chemical composition parameters of the sealing agent by introducing a specific glycol ether (Formula 1) with controlled chain length (p≥3) and replacing conventional surfactants with sulfate ester salt surfactants. These parameter changes enable the sealing agent to maintain effective sealing properties with reduced liquid amount by improving foam stability and adhesion efficiency.
Solution Approach 2:
The patent creates a composite formulation combining rubber latex/resin emulsion with a specific glycol ether (Formula 1) and sulfate ester salt surfactant. This composite material system works synergistically to achieve both reduced volume and maintained sealing reliability through enhanced foam generation and puncture hole sealing efficiency.
2Temperature
If conventional glycol ethers are used, then freeze resistance is achieved, but sealing properties are insufficient in reduced liquid amounts
Solution Approach 1:
The patent applies local quality by specifying particular structural characteristics of the glycol ether (Formula 1) with p≥3, creating optimal local molecular properties that simultaneously provide freeze resistance and enhanced sealing performance in reduced volumes. The specific chain length and sulfate ester salt surfactant create localized optimal conditions for both functions.
3Quantity of substance
If the liquid amount is reduced to approximately 2/3 of conventional amount, then the puncture repair kit becomes smaller, but the sealing effectiveness deteriorates
Solution Approach 1:
The patent changes the concentration and composition parameters by using specific glycol ether (Formula 1) at 70-300 parts by mass per 100 parts solid content and sulfate ester salt surfactant at 3-20 parts by mass per 100 parts solid content. These parameter optimizations enable effective sealing with approximately 2/3 of conventional liquid amounts.
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 composition achieves excellent freeze resistance and sealing properties even in a small liquid amount, with improved injectability and foaming characteristics that maintain sealing effectiveness.
Implementation Method 1
the glycol ether content being from 70 to 300 parts by mass per 100 parts by mass total of a solid content of the rubber latex and a solid content of the resin emulsion
Implementation Method 2
the surfactant content being from 3 to 20 parts by mass per 100 parts by mass total of a solid content of the rubber latex and a solid content of the resin emulsion, which lowers viscosity and enhances foaming for improved sealing
Implementation Method 3
The tire puncture sealing agents are required to be hard to freeze even at low temperatures (required to have freeze resistance) so that the tire puncture sealing agents can be used in a cold region
Data Source
AI summary
An object of the present invention is to provide a tire puncture sealing agent that has excellent freeze resistance and that also exhibits excellent sealing properties even in a small liquid amount. The tire puncture sealing agent of the present invention contains: a rubber latex and/or a resin emulsion; a glycol ether represented by Formula (1) below; and a surfactant. In Formula (1), R11 represents a hydrogen atom or an alkyl group. R12 represents an alkyl group. p represents an integer of 1 or greater.