Diethylhydroxylamine Oxygen Scavenger for Tire Safety
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Solution Overview
Problem
Pneumatic tires filled with compressed air pose an explosion hazard due to oxygen presence and oxidative degradation of rubber, and nitrogen filling can be impractical in various settings.
Innovation Solution
Introducing a liquid aqueous oxygen scavenger, such as diethylhydroxylamine (DEHA) and hydroquinone, into the tire air chamber to reduce oxygen levels, which can be done at the time of tire assembly or later, allowing subsequent filling with air or nitrogen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If pneumatic tires are filled with compressed air, then the tire can be easily filled and used, but oxygen presents an explosion hazard and causes oxidative degradation of rubber
Solution Approach 1:
The patent extracts and removes oxygen from the tire air chamber by introducing an oxygen scavenger composition that chemically binds with oxygen. This allows the tire to be filled with regular air while actively removing the harmful oxygen component, resolving the contradiction between ease of filling and safety/degradation issues
Solution Approach 2:
The oxygen scavenger composition acts as an intermediary substance introduced into the tire air chamber. It mediates between the filled air and the tire materials by chemically consuming oxygen, thereby protecting the rubber from oxidative degradation and reducing explosion hazards while allowing regular air filling
2Object-affected harmful factors
If nitrogen is used to fill the tire, then explosion hazard and oxidative degradation are avoided, but nitrogen filling and refilling becomes impractical in various settings
Solution Approach 1:
Instead of requiring nitrogen filling, the patent extracts oxygen from regular air using an oxygen scavenger. This approach achieves the safety benefits of nitrogen (low oxygen environment) while maintaining the practical advantages of regular air filling infrastructure
Solution Approach 2:
The oxygen scavenger composition serves as a consumable, disposable element introduced into the tire. It performs the oxygen removal function throughout the tire's service life and is replaced with the tire itself, eliminating the need for impractical nitrogen refilling operations
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 oxygen scavenger effectively reduces oxygen to less than 5% by volume within 24 hours and maintains this reduction after refills, extending tire life and safety by mitigating explosion risks and oxidative degradation.
Implementation Method 1
introducing a liquid aqueous oxygen scavenger into the air chamber of a tire mounted on a wheel
Data Source
AI summary
Methods of reducing oxygen in tire air chambers with an oxygen scavenger that contains diethylhydroxylamine are disclosed herein. Compositions including diethylhydroxylamine for reducing oxygen in tire air chambers are disclosed herein. Wheel assemblies including compositions containing diethylhydroxylamine for reducing oxygen in tire air chambers are disclosed herein.