Fluorochemical Surface Treating Agent Mar Resistance
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Solution Overview
Problem
Existing fluorochemical surface treating agents fail to provide adequate mar resistance and chemical resistance, especially when exposed to outdoor conditions and harsh chemicals like salt water and acid, while also struggling with adhesion and reactivity issues.
Innovation Solution
A fluorochemical surface treating agent comprising a hydrolyzable group-containing silane modified with a fluorooxyalkylene-containing polymer and/or its partial hydrolytic condensate, which forms a water/oil repellent layer with improved mar resistance and chemical resistance by using a polymer with a fluorooxyalkylene structure backbone and a siloxane bond-free linking group, and optionally including additional hydrolyzable group-containing silanes or fluorooxyalkylene-containing polymers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluorooxyalkylene-containing compounds are used to provide water/oil repellency and chemical resistance, then surface free energy is reduced and repellency is improved, but adhesion to substrate is poor and coating does not tightly adhere
Solution Approach 1:
The patent uses silane coupling agents as intermediary substances that contain both hydrolyzable silyl groups for bonding to glass or fabric substrates and organic functional groups including fluorooxyalkylene groups for providing water/oil repellency. This intermediary structure enables both substrate adhesion and surface repellency to coexist.
Solution Approach 2:
The invention creates a composite coating material that combines silane coupling agent properties (adhesion, durability) with fluorooxyalkylene compound properties (repellency, chemical resistance). The composite structure integrates the beneficial properties of both material types into a single functional coating.
2Strength
If both terminal groups of fluorooxyalkylene-containing silane are bonded to substrate, then adhesion is improved, but surface lubricity is insufficient and mar resistance is poor
Solution Approach 1:
The patent applies local quality by having different regions of the coating perform different functions: the silane coupling agent portion provides strong substrate bonding at the interface, while the fluorooxyalkylene functional groups provide water/oil repellency and surface lubricity at the outer surface. This spatial differentiation of properties resolves the contradiction between adhesion and lubricity.
3Strength
If existing surface treating agents are used to provide abrasion resistance and mar resistance, then coating durability is improved, but chemical resistance is insufficient and performance degrades with fingerprints and detergents
Solution Approach 1:
The invention merges multiple functions into a single surface treating agent: the silane coupling agent provides abrasion resistance and coating durability, while the integrated fluorooxyalkylene groups provide chemical resistance and water/oil repellency. This merging eliminates the need for separate coatings and ensures all properties work together synergistically.
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 treated surfaces exhibit enhanced mar resistance, chemical resistance, and water/oil repellency, maintaining performance over time even under outdoor and harsh chemical exposure.
Implementation Method 1
In the presence of airborne moisture or the like, the hydrolyzable silyl groups undergo self-condensation reaction to form a coating
Implementation Method 2
the hydrolyzable silyl groups undergo self-condensation reaction
Implementation Method 3
As the hydrolyzable silyl groups form chemical and physical bonds with the surface of glass or fabric
Implementation Method 4
As the hydrolyzable silyl groups form chemical and physical bonds with the surface of glass or fabric
Implementation Method 5
fluorooxyalkylene-containing compounds exhibit, by virtue of their extremely low surface free energy, water/oil repellency
Data Source
AI summary
A fluorochemical surface treating agent comprising a hydrolyzable group-containing silane modified with a fluorooxyalkylene-containing polymer and/or a partial hydrolytic condensate thereof forms a water/oil repellent layer having chemical resistance and mar resistance.