Perfluoropolyether Coating Resists Water Scale and Oil
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Solution Overview
Problem
Conventional stain-resistant coating materials for sanitary ceramic wares and glass products are prone to oily component adhesion, leading to contaminant accumulation, and fail to effectively resist both water scale and oily components when exposed to water containing soluble silica.
Innovation Solution
A stain-resistant coating material comprising a perfluoropolyether main agent, an alkane solvent with a mean molecular weight of 138 to 180 g/mol, and a fluorine-based solvent, such as hydrofluoroether, which shields hydroxyl groups and prevents oily component adhesion, while maintaining stability and reactivity with hydrochloric acid as a catalyst.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional stain-resistant coating material is applied, then water scale resistance is improved, but oily component adhesion increases
Solution Approach 1:
The patent changes the chemical composition parameters of the coating material by incorporating perfluoropolyether and specific alkane solvents with controlled molecular weights (138-180 g/mol). This parameter modification transforms the coating's surface properties to simultaneously achieve water scale resistance and oily component repellency, resolving the contradiction between water scale resistance and oily component adhesion.
Solution Approach 2:
The invention creates a composite coating material combining perfluoropolyether main agent, hydrofluoroether solvent, and specific alkane solvent. This composite formulation integrates the water-resistant properties of perfluoropolyether with the oil-repellent characteristics of the alkane-alkene complex, achieving dual functionality that resolves the contradiction between resisting water scale and preventing oily component adhesion.
2Reliability
If perfluoroalkyl group-containing organosilicon compound is used, then water scale resistance is improved, but manufacturing complexity increases
Solution Approach 1:
The patent simplifies manufacturing by changing the chemical structure parameters to perfluoropolyether, which has inherent stability and reactivity characteristics that eliminate the need for complex co-hydrolysis processes. The use of hydrofluoroether as solvent further simplifies the formulation, reducing manufacturing complexity while maintaining water scale resistance.
3Speed
If strong acid catalyst is used, then reactivity is improved, but stability decreases
Solution Approach 1:
The patent changes the catalyst system from strong acids to hydrochloric acid at controlled concentrations (0.1-1.0 g/L), optimizing the balance between reactivity and stability. This parameter adjustment provides sufficient reaction speed for coating formation while maintaining composition stability during storage and application, resolving the contradiction between reaction speed and composition stability.
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
Enhances both water scale and oily component resistance in sanitary ceramic wares and glass products, maintaining a clean and smooth appearance over time by preventing hydroxyl group interaction with soluble silica and oily components.
Implementation Method 1
the stain-resistant layer shields the hydroxyl groups present on the surface of the glaze layer or glass, and shields the hydroxyl groups to make them incompetent
Implementation Method 2
oily components do not easily stick to the stain-resistant layer
Implementation Method 3
a perfluoropolyether main agent, and a solvent including an alkane and an alcohol... with hydrochloric acid as a catalyst
Data Source
AI summary
The invention is intended to easily enhance both the stain-resistant property against water scale and the stain-resistant property against oily components, in sanitary ceramic wares and the like which are brought into contact with water containing soluble silica as well as oily components. The stain-resistant coating material of the invention contains a main agent formed from a perfluoropolyether, and a solvent including an alkane and an alcohol, while the alkane has mean molecular weight of 138 to 180 g/mol.