Hydrolysable Silane Coating for Abrasion-Resistant Stain Repellency
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Solution Overview
Problem
Existing protective coatings for hard surfaces fail to maintain initial repellent properties under abrasion conditions and require aggressive detergents for cleaning, leading to detachment from the surface.
Innovation Solution
A coating composition comprising hydrolysable silane and a polymer with a polysiloxane segment, which forms a durable, easy-to-clean, and stain-resistant layer on surfaces through condensation reactions, preventing stains and soil penetration and maintaining properties during repeated cleanings and abrasion tests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional protective coatings are applied to hard surfaces, then initial stain and soil resistance is achieved, but the repellent properties deteriorate under abrasion conditions
Solution Approach 1:
The patent uses a composite coating system combining a resin component with hydrolysable silane crosslinking agents. The silane forms a hybrid organic-inorganic network that integrates into the resin matrix, creating a composite material that enhances mechanical durability and abrasion resistance while maintaining the stain and soil repellent properties. This composite structure allows the coating to withstand abrasion without detaching or losing its protective functionality.
2Ease of operation
If conventional protective coatings are applied to hard surfaces, then stain and soil resistance is achieved, but aggressive detergents and intensive scrubbing are required for cleaning
Solution Approach 1:
The patent modifies the chemical parameters of the coating by incorporating hydrolysable silane groups that create a specific surface chemistry. This changes the surface energy and chemical composition to provide inherent soil and stain repellency, allowing dirt and stains to be removed with mild soaps and water rather than requiring aggressive detergents. The silane-modified resin creates a surface that resists adhesion of soils, making cleaning easier and less harsh.
3Strength
If conventional protective coatings are applied to hard surfaces, then initial protection is provided, but the coating becomes detached from the surface after abrasion tests
Solution Approach 1:
The patent replaces purely mechanical adhesion mechanisms with chemical bonding through silane crosslinking. The hydrolysable silane forms chemical bonds between the coating resin and the substrate, creating a strong chemical attachment that is not dependent on mechanical interlocking alone. This chemical bonding mechanism provides superior adhesion strength that is maintained even after abrasion, preventing the coating from detaching while preserving the protective properties.
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 coating composition provides high resistance to stains and soil, easy cleanability, and prevents stains from penetrating into the substrate, maintaining these properties even after exposure to abrasion tests, ensuring durability and ease of maintenance.
Implementation Method 1
coating compositions comprising at least one hydrolysable silane and a polymer comprising a polysiloxane segment having a plurality of hydrolysable groups can provide a durable soil and stain resistant coating to surfaces
Data Source
AI summary
There is provided a method coating a surface with a protective coating, comprising (i) applying to the surface a composition comprising dispersed in an organic solvent (a) at least one hydrolysable silane having the formula (I) QnSiG4-n, wherein Q represents a hydrocarbon group, G represents a hydrolysable group and n is 0, 1 or 2; (b) at least one polymer A comprising a polysiloxane segment and having a plurality of -SiY functional groups wherein Y represents a hydrolysable group and wherein the amount of hydrolyzable groups Y bonded to Si atoms is on average more than 6 per polymer; or a condensation product of a hydrolysation reaction of (a) or (b) or (a) and (b) with the proviso that the reaction product is such that not all hydrolysable groups have been consumed, (ii) heat-curing the composition. There are also provided substrates and compositions as described above for coating these substrates.