Self-lubricating polyimide varnish and polyimide coatings produced therefrom
A self-lubricating polyimide varnish with reduced friction, using polyamic acid, nanosilica, and a silicon-based additive, addresses the deformation issue in electric vehicle windings, enhancing processing efficiency and maintaining key properties.
JP7884099B2Active Publication Date: 2026-07-02PI ADVANCED MATERIALS CO LTD
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- PI ADVANCED MATERIALS CO LTD
- Filing Date
- 2023-06-27
- Publication Date
- 2026-07-02
AI Technical Summary
Technical Problem
Polyimide varnishes used for insulating coatings on electric vehicle windings face high frictional forces during processing, leading to deformation of windings and reduced workability.
Method used
A self-lubricating polyimide varnish is developed using polyamic acid, nanosilica surface-modified with organosilane, and a silicon-based additive to reduce friction, while maintaining heat resistance, insulation, and mechanical properties.
Benefits of technology
The self-lubricating polyimide varnish improves processing efficiency by reducing friction, ensuring the integrity of winding shapes and maintaining essential properties like adhesion and mechanical strength.
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Smart Images
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Abstract
The present invention provides a polyimide varnish containing a polyamic acid containing one or more dianhydride monomers and one or more diamine monomers as polymerization units, nanosilica surface-modified with an organic silane, a silicon-based additive represented by the following Chemical Formula 1, and an organic solvent. 【Chemical Formula 1】 TIFF2025521661000009.tif42168
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