PAM-Coated Peroxide Container for Pressurized Storage Stability
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Solution Overview
Problem
Peroxides are prone to decomposition due to their unstable oxygen-oxygen bond, leading to potential container rupture and hazards, and existing storage methods fail to maintain a constant peroxide concentration for prolonged storage, especially in pressurized forms.
Innovation Solution
A container with an internal polyamide-imide (PAM) coating stabilizes peroxides, preventing decomposition and allowing pressurized storage, even at elevated pressures, by acting as a barrier between the peroxide and the container wall, especially when made of metal like aluminum.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If peroxide solutions are stored in unpressurised containers, then container rupture and combustion hazards are reduced, but the ability to use pressurised solutions for fumigation and aerosol application is limited
Solution Approach 1:
A polyamide-imide (PAM) coating is applied as an intermediary layer between the peroxide solution and the container wall. This coating acts as a stabilizing barrier that prevents direct contact between the peroxide and metal surfaces, thereby allowing pressurized storage without the usual decomposition and safety hazards. The coating enables the system to achieve both pressurization capability and storage safety simultaneously.
2Duration of action of stationary object
If inert coatings are used inside peroxide containers, then short term storage is improved, but constant peroxide concentration cannot be maintained for prolonged storage periods
Solution Approach 1:
The patent employs a composite material approach by using a polyamide-imide (PAM) coating on the container interior. This specific polymer coating material provides superior stabilization properties compared to conventional inert coatings. The PAM coating maintains constant peroxide concentration over extended storage periods (years) by effectively preventing decomposition, thereby resolving the contradiction between storage duration and composition stability.
3Reliability
If peroxide concentration is maintained at high levels for sterilizing efficacy, then sterilizing effectiveness is improved, but decomposition and oxygen evolution are accelerated
Solution Approach 1:
The PAM coating serves as a protective intermediary that allows high concentration peroxide to be stored stably. By preventing direct contact between the peroxide and container wall, the coating eliminates the catalytic decomposition effect that would otherwise occur at high concentrations. This enables the system to maintain high peroxide concentration for sterilizing efficacy without the usual acceleration of decomposition and oxygen evolution.
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 PAM coating extends the shelf life of peroxides by preventing decomposition and maintaining effective peroxide concentration for extended periods, enabling safe storage and use as an aerosol without risk of container rupture.
Implementation Method 1
The PAM coating provides a barrier between the container wall and composition which, in embodiments in which the container comprises a metal, avoids metal-catalysed decomposition of the peroxide.
Implementation Method 2
the PAM coating provides a stabilising effect on the peroxides which permits the composition to be stored for extended periods of time without appreciable degradation of the one or more peroxides
Data Source
AI summary
A container containing an aqueous composition comprising one or more peroxides is provided. The container includes an internal surface which is coated with a polyamide-imide (PAM) coating.