Polysiloxane Coating for Hard Surfaces Without Fluorinated Compounds
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Solution Overview
Problem
Current protective coating compositions for metallic and siliceous surfaces, particularly chromium and glass substrates, face challenges in providing durable, easy-to-clean, and contamination-resistant properties without using fluorinated compounds, which are environmentally questionable, and often require aggressive cleaning methods that can damage the surface aesthetics.
Innovation Solution
A non-fluorinated protective coating composition comprising a polysiloxane with a specific molecular formula and an organic solvent, applied as a thin layer that can be easily wiped clean, offering excellent durability and resistance to mechanical abrasion without high-temperature curing, and incorporating an amino-functional silane for enhanced adhesion and crosslinking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If fluorinated compounds are used in protective coating compositions, then oleophobic and easy-to-clean properties are improved, but environmental compatibility deteriorates
Solution Approach 1:
The patent extracts and removes fluorinated compounds from the protective coating composition, replacing them with non-fluorinated alternatives that provide similar oleophobic properties without the environmental harm associated with fluorinated substances
Solution Approach 2:
The patent changes the chemical composition parameters by substituting fluorinated compounds with non-fluorinated surfactants and silane-based additives, maintaining the oleophobic effect while improving environmental compatibility
2Ease of operation
If aggressive cleaning methods are used to remove oily contamination, then contamination removal is improved, but surface aesthetics deteriorate
Solution Approach 1:
The patent applies preliminary anti-action by forming a protective coating that prevents oily contamination from adhering to the surface in the first place, making gentle cleaning sufficient and avoiding the need for aggressive methods that would damage surface aesthetics
Solution Approach 2:
The coating provides self-service by creating a surface that naturally resists oily contamination through its oleophobic properties, allowing simple wiping to maintain cleanliness without requiring harsh cleaning agents or mechanical abrasion
3Strength
If high-temperature curing is used to enhance coating durability, then coating strength is improved, but energy consumption and complexity increase
Solution Approach 1:
The patent changes the curing parameters by formulating a composition that cures at lower temperatures through the use of moisture-curing silane chemistry and catalytic promoters, achieving adequate crosslinking and durability without high-temperature processing
Solution Approach 2:
The patent substitutes thermal curing with moisture-curing chemistry, where ambient moisture triggers the crosslinking reaction of silane groups, eliminating the need for high-temperature ovens or heating systems while still achieving durable coating formation
4Reliability
If water-soluble polymers are used for corrosion protection, then corrosion resistance is improved, but adhesion to chromium surfaces deteriorates
Solution Approach 1:
The patent creates a composite coating system combining water-soluble polymer matrices with silane-based adhesion promoters and surfactants, where the polymer provides corrosion protection while the silane components establish strong chemical bonds with chromium surfaces
Solution Approach 2:
The patent introduces silane-based intermediaries that act as molecular bridges between the water-soluble polymer and the chromium surface, with the silane groups forming covalent bonds with the metal while the polymer chains provide the corrosion-resistant coating matrix
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 outstanding easy-to-clean and contamination-resistant properties, maintaining the optical and haptic qualities of the surfaces, with improved durability and ease of application, while being environmentally friendly and free from the need for aggressive scrubbing or fluorinated solvents.
Implementation Method 1
incorporating an amino-functional silane for enhanced adhesion and crosslinking
Implementation Method 2
incorporating an amino-functional silane for enhanced adhesion and crosslinking
Implementation Method 3
stainless steel and glass substrates are particularly sensitive to oily contaminants such as fingerprints, stains or marks originating from oily of fat components
Implementation Method 4
incorporating an amino-functional silane for enhanced adhesion and crosslinking
Data Source
AI summary
The present disclosure relates to a protective coating composition for a hard surface, wherein the composition comprises an organic solvent and a polysiloxane having the general formula (I), wherein: R1, R2, R3, R4, R5, R6, R7 and R8 are independently an alkyl group having from 1 to 8 carbon atoms; Y and Z are independently a divalent linking group selected from the group consisting of urea, urethane, oxygen atom, sulfur atom and alkylene having from 1 to 8 carbon atoms; A, B, L and M are independently a divalent slinking group selected from the group consisting of alkylene having from 1 to 8 carbon atoms, with the proviso that if the combined linking groups formed by -A-Y-L- and -M-Z—B— are independently an alkylene, then the alkylene is independently different from ethylene; n is an integer from 5 to 1500; and m and p are independently an integer from 1 to 3. In another aspect, the present disclosure is directed to a method of reducing contamination from a hard surface.