Amino-Functional Silane Primer for Metal Coating Adhesion
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Solution Overview
Problem
Existing methods for imparting repellent properties to metal surfaces are expensive, time-consuming, and ineffective in providing durable oil and water repellency, leading to difficulties in cleaning and maintaining the aesthetic appearance of metal articles such as kitchen and bathroom fixtures, automotive parts, and other metal surfaces.
Innovation Solution
A method involving a primer composition with a secondary or tertiary amino-functional compound having at least two independently selected silane groups, followed by a treatment composition containing a fluorinated compound, specifically a polyfluoropolyether group, to form a durable easy-to-clean coating on metal surfaces, which enhances the repellency and cleaning ease without aggressive scrubbing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluorinated silane compounds are applied to metal surfaces, then oil and water repellency is achieved, but the coating lacks durability and adhesion compared to glass and ceramics
Solution Approach 1:
The patent introduces an amino-functional silane compound as an intermediary layer between the metal surface and the fluorinated silane coating. This intermediary layer improves adhesion by chemically bonding to the metal surface through its silane groups and providing anchoring points for the fluorinated silane, thereby resolving the poor adhesion issue while maintaining coating durability
Solution Approach 2:
The patent creates a composite coating system combining amino-functional silane and fluorinated silane compounds. The amino-functional silane provides strong metal surface bonding, while the fluorinated silane provides oil and water repellency. This composite approach allows each component to contribute its strengths, achieving both durable adhesion and effective repellency on metal surfaces
2Object-affected harmful factors
If existing surface modification techniques are used on metal surfaces, then some repellent properties are achieved, but the process becomes expensive and time-consuming
Solution Approach 1:
The patent combines the primer and treatment steps into a unified two-component system that can be applied simultaneously or in quick succession. The amino-functional silane and fluorinated silane work together in a single coating process, eliminating the need for separate, time-consuming surface modification steps while achieving effective repellent properties
Solution Approach 2:
The patent modifies the chemical parameters of the coating system by using amino-functional silane compounds with specific molecular structures that enable rapid curing and strong adhesion. This allows the coating process to be completed more quickly without sacrificing repellent performance, reducing the overall processing time
3Ease of operation
If aggressive scrubbing is used to remove deposits, then cleaning effectiveness is improved, but the aesthetic appearance of the metal surface deteriorates
Solution Approach 1:
The patent applies a durable coating to the metal surface in advance that creates oil and water repellency. This preliminary action prevents oily and aqueous deposits from adhering strongly to the surface, making subsequent cleaning much easier and allowing gentle cleaning methods to effectively remove deposits without damaging the surface appearance
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 method provides a durable, easy-to-clean metal surface that maintains repellency after repeated cleaning, ensuring the surface remains resistant to oily and aqueous deposits, thus improving the aesthetic and functional performance of metal articles.
Implementation Method 1
treating the metal surface with a primer composition including a secondary or tertiary amino-functional compound having at least two independently selected silane groups
Implementation Method 2
subsequently treating the primed metal surface with a treatment composition including a fluorinated compound
Implementation Method 3
a fluorinated compound represented by formula Rf{-X-[Si(Y)3-x(R)x]y}z wherein Rf is a polyfluoropolyether group
Data Source
AI summary
A method of making a treated article having a metal surface. The method includes treating the metal surface with a primer composition comprising a secondary or tertiary amino-functional compound having at least two independently selected silane groups to provide a primed metal surface and subsequently treating the primed metal surface with a treatment composition comprising a fluorinated compound represented by formula Rf{-X-[Si(Y)3-x(R)x]y}z. An article treated by such a method is also disclosed. The use of a secondary or tertiary amino-functional compound having at least two independently selected silane groups as a primer for a metal surface before treatment with the fluorinated silane and a method of treating a metal surface with a treatment composition including the secondary or tertiary amino-functional compound having at least two independently selected silane groups and certain fluorinated silanes are also disclosed