Insulating Paint Reducing Agent High Temperature Adhesion
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Solution Overview
Problem
Conventional insulating paints for insulated wires fail to maintain adhesion force with conductors at high temperatures, leading to decreased insulating characteristics and mechanical strength, as they do not effectively prevent oxide film formation on conductor surfaces.
Innovation Solution
Incorporating a specific reducing agent with a high boiling point into the insulating film, which is uniformly dispersed in the solvent component of the resin composition, to suppress oxide film formation and maintain adhesion properties even after heat treatment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesion-improving agent is added to insulating paint, then adhesion properties of insulating film with conductor are improved, but heat resistance of insulating film becomes insufficient
Solution Approach 1:
The patent introduces a silane coupling agent as an intermediary substance that mediates between the insulating film and the conductor. This coupling agent forms a bridge that provides both adhesion improvement and heat resistance, resolving the contradiction by enabling the insulating film to maintain strong bonding to the conductor even at high temperatures without relying solely on adhesion-improving agents that compromise heat resistance
Solution Approach 2:
The patent creates a composite insulating film structure that combines multiple components including polyesterimide resin, polyamideimide resin, and silane coupling agent. This composite material approach allows the film to simultaneously achieve improved adhesion properties and maintained heat resistance, as each component contributes different functional properties that work together to resolve the contradiction
2Strength
If adhesion-improving agent is added to improve mechanical strength, then windability of insulated wire is improved, but insulating characteristics deteriorate due to decreased insulating film strength under heat history
Solution Approach 1:
The silane coupling agent acts as a mediator that enhances the interface between the insulating film and conductor, providing mechanical strength improvement for better windability while simultaneously maintaining the insulating film's integrity and insulating characteristics under heat history, thus resolving the contradiction between mechanical strength and reliability
3Strength
If insulating paint is designed for improved adhesion at initial stage, then adhesion properties are achieved, but adhesion properties cannot be maintained after long-time high temperature exposure
Solution Approach 1:
The patent incorporates silane coupling agent and antioxidant into the insulating paint formulation before application, which preliminarily prepare the insulating film to resist oxidation and maintain adhesion. This preliminary action ensures that when the insulated wire is exposed to high temperature conditions over long time, the adhesion properties are maintained through the protective effects already in place
Solution Approach 2:
The silane coupling agent serves as a stable intermediary that maintains the bond between insulating film and conductor over long periods at high temperatures, preventing oxidation and adhesion degradation, thus extending the duration of adhesion maintenance
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 ensures that the insulating film retains excellent adhesion and heat resistance, preventing a decrease in adhesion force and mechanical strength, even under prolonged high-temperature exposure, thereby providing a highly reliable insulated wire.
Implementation Method 1
In order to suppress formation of an oxide film after exposure to a high temperature, attempts have been made for adding a component (adhesion-improving agent) for improving the adhesion properties of the insulating film with a metallic conductor
Data Source
Figure 1~3
Figure 4~5
AI summary
Insulating paint, containing a resin that can form an insulating film by application and baking, and a reducing agent having a boiling point of 160°C or higher.