Coating Resin Composition for Anti-Fogging and Anti-Dirt Properties
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Solution Overview
Problem
Existing coating resin compositions do not effectively combine anti-fogging and anti-dirt properties, with most focusing on either property independently.
Innovation Solution
A coating resin composition comprising a cyclic ether group-containing polymer and a component with polycarboxylic acid or polycarboxylic acid anhydride, which reacts to form a coating film with high hydrophilicity and oleophobicity, providing both anti-fogging and anti-dirt properties through specific monomer ratios and reaction conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a coating resin composition focuses on anti-fogging property using cyclic ether groups, then anti-fogging performance is improved, but anti-dirt property is not sufficiently considered
Solution Approach 1:
The coating resin composition integrates multiple functional groups (cyclic ether groups for anti-fogging, carboxyl groups for adhesion, and hydrophobic/hydrophilic balance for anti-dirt) into a single coating system, allowing the coating film to simultaneously provide anti-fogging, anti-dirt, and adhesion properties rather than requiring separate specialized coatings
Solution Approach 2:
The invention uses a composite resin system combining polymerizable unsaturated monomers with cyclic ether groups, carboxyl-containing monomers, and specific additives to create a multi-functional coating material that achieves both anti-fogging and anti-dirt properties through the synergistic interaction of different chemical components
2Reliability
If the coating film has high hydrophilicity for anti-fogging, then water contact angle decreases, but dirt adhesion may increase
Solution Approach 1:
The coating film creates different local chemical environments by distributing hydrophilic groups (from cyclic ether and carboxyl groups) and hydrophobic groups (from the polymer backbone and alkyl chains) in specific ratios and configurations, allowing the surface to exhibit both high hydrophilicity for anti-fogging and appropriate hydrophobicity for anti-dirt properties
Solution Approach 2:
The invention precisely controls the water contact angle parameter within a specific range (20° to 90°) by adjusting the composition ratios of monomers with different hydrophilicities and the degree of crosslinking, optimizing the balance between hydrophilicity for anti-fogging and hydrophobicity for anti-dirt performance
3Reliability
If the coating resin composition uses complex monomer combinations, then performance is improved, but manufacturing complexity increases
Solution Approach 1:
The patent identifies and utilizes monomers that possess multiple functional groups or can perform multiple roles (e.g., monomers that provide both structural framework and hydrophilic groups, or monomers that contribute to both adhesion and crosslinking), reducing the need for separate specialized additives and simplifying the overall composition
Solution Approach 2:
The invention combines multiple functions into fewer chemical components by selecting monomers that can simultaneously contribute to polymer backbone formation, crosslinking, adhesion, and surface properties, thereby reducing the total number of ingredients and simplifying the formulation process while maintaining high performance
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 composition achieves a coating film with high strength, adhesiveness to inorganic oxides, and balanced hydrophilicity and oleophobicity, ensuring excellent anti-fogging and anti-dirt performance.
Implementation Method 1
a cyclic ether group-containing polymer (A) and a component (B) consisting of at least one compound selected from a group consisting of a polycarboxylic acid (b1) and a polycarboxylic acid anhydride (b2)... a cured product of the coating resin composition which is cured by being heated
Implementation Method 2
the coating film contains a hydroxyl group which is generated by a reaction either between a cyclic ether group and a carboxyl group or between a cyclic ether group and anhydrous carboxyl group... high hydrophilicity
Implementation Method 3
the coating film can have the high strength, a high anti-fogging property, and a high anti-dirt property... balanced hydrophilicity and oleophobicity
Data Source
AI summary
The present invention aims to provide a coating resin composition which can be formed into a coating film having an anti-fogging property and an anti-dirt property. A coating resin composition is used for forming a coating film and contains: a cyclic ether group-containing polymer (A) which is a polymer of a polymerizable monomer component (a) containing an ethylene-based unsaturated monomer (a11) having a cyclic ether group; and a component (B) consisting of at least one compound selected from a group consisting of a polycarboxylic acid (b1) and a polycarboxylic acid anhydride (b2). A cured product of the coating resin composition which is cured by being heated for 0.1 hour or more at a temperature higher than or equal to 100 °C and lower than or equal to a decomposition temperature of the coating resin composition has a water contact angle of 90° or less under a measurement specified by JIS R3257.