Polyimide Primer Hybrid Structure for Thermal Stability
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Solution Overview
Problem
Current non-stick coatings based on fluorocarbon resins face challenges with adhesion issues due to poor solubility of polyamide-imide and polyimide resins, leading to inhomogeneous distribution and thermal instability, along with the generation of volatile organic compounds causing yellowing and corrosion.
Innovation Solution
A non-stick coating primer composition is developed by reacting polyimide or polyamide-imide resin with a coupling agent and alkoxysilane, forming an organic-inorganic hybrid structure with nanometric silica domains dispersed in the polymer matrix, enhancing thermal stability and mechanical resistance while reducing yellowing and corrosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If polyamide-imide or polyimide resins are used in powder form to achieve light-colored primer layers, then color stability is improved, but manufacturing complexity increases due to difficulty in grinding to small particle sizes and achieving homogeneous distribution
Solution Approach 1:
The patent changes the physical state parameter of the resin from powder to solution form. The polyamide-imide or polyimide resin is dissolved in a solvent to create a homogeneous liquid composition, eliminating the need for grinding and particle size reduction while maintaining color stability and adhesion properties.
Solution Approach 2:
The patent introduces a solvent as an intermediary medium to dissolve the resin and enable homogeneous distribution. The solvent acts as a carrier that facilitates uniform dispersion of the resin throughout the primer composition, avoiding aggregation and adhesion loss associated with powdered resins.
2Object-affected harmful factors
If adhesion resins are delivered in water-dilutable powder form to reduce solvent constraints, then environmental compatibility is improved, but thermal stability deteriorates due to decomposition at sintering temperatures above 370°C
Solution Approach 1:
The patent creates a composite adhesion resin system combining organic polyimide/polyamide-imide resin with inorganic silica particles. This composite structure provides both the desired environmental compatibility and enhanced thermal stability, as the inorganic silica reinforcement maintains structural integrity at high sintering temperatures where pure organic resins would decompose.
Solution Approach 2:
The patent introduces silica particles with specific surface treatments to create localized reinforcement zones within the resin matrix. These treated silica particles are distributed throughout the composition to provide thermal stability at critical locations, particularly at the interface with the support and within the primer layer structure.
3Strength
If colloidal silica is added to reinforce the primer film, then mechanical resistance is improved, but harmful nanoporosities are generated due to silica particle aggregation, reducing impermeability
Solution Approach 1:
The patent extracts and removes the harmful aggregation tendency of colloidal silica particles through surface treatment. By modifying the silica particle surfaces with coupling agents or surfactants, the particles remain individually dispersed rather than aggregating, thereby maintaining mechanical reinforcement without creating nanoporosities that would compromise film impermeability.
Solution Approach 2:
The patent introduces a coupling agent or surface treatment as an intermediary between the silica particles and the resin matrix. This intermediary layer prevents direct aggregation of silica particles while maintaining strong interfacial bonding, achieving mechanical reinforcement without the formation of harmful nanoporous structures.
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 achieves improved thermal stability, mechanical resistance, and reduced yellowing, with excellent adhesion and corrosion resistance, making it suitable for culinary and other applications.
Implementation Method 1
a coupling agent allowing the coupling between the PI and/or PAI resin and the alkoxysilane and/or the metal alkoxylate
Implementation Method 2
Such a reaction leads to the crosslinking of the whole by a sol-gel type reaction and an organic-inorganic hybrid structure is obtained with the formation in-situ of a network of nanometric-sized silica domains
Implementation Method 3
the formation in-situ of a network of nanometric-sized silica domains
Implementation Method 4
an organic-inorganic hybrid structure is obtained with the formation in-situ of a network of nanometric-sized silica domains perfectly dispersed in the PI and/or PAI resin matrix
Data Source
Figure 1~2
AI summary
The present invention relates to non-stick coating hybrid primer compositions based on polyimide resin and/or polyamide-imide resin. The present invention also relates to processes for preparing such compositions. Finally, the present invention relates to non-stick coatings incorporating such compositions and to a process for manufacturing articles comprising such non-stick coatings.