Hydrophilic Coating Composition with Silane Crosslinking
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Solution Overview
Problem
Existing hydrophilic coatings lack sufficient water resistance and fog resistance, leading to deterioration of hydrophilicity when in contact with water.
Innovation Solution
A hydrophilic composition comprising a specific hydrophilic copolymer and a blocked isocyanate silane compound, which forms a crosslinked film structure that enhances water resistance and fog resistance on organic and inorganic substrates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a hydrophilic copolymer with quaternary ammonium salt structure is used as coating agent, then hydrophilicity and fog resistance are improved, but water resistance deteriorates causing surface property degradation
Solution Approach 1:
The patent combines a hydrophilic copolymer (containing quaternary ammonium salt structure for hydrophilicity) with a silane crosslinking agent to create a composite coating system. The silane crosslinks form a three-dimensional network structure within the coating film, creating a composite material that simultaneously provides hydrophilic properties and water resistance, resolving the contradiction between these two properties
Solution Approach 2:
The patent modifies the molecular structure parameters of the coating material by introducing silane crosslinking groups that form three-dimensional networks. This changes the physical and chemical parameters of the coating film, creating a crosslinked structure that enhances water resistance while preserving the hydrophilic properties provided by the copolymer's quaternary ammonium salt groups
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 provides a film with long-lasting hydrophilicity and fog resistance, maintaining excellent surface properties even after exposure to water.
Implementation Method 1
a blocked isocyanate silane compound, which forms a crosslinked film structure that enhances water resistance and fog resistance
Data Source
AI summary
A hydrophilic composition that contains (A) 100 parts by mass of a hydrophilic copolymer containing structural units represented by formula (1) and structural units represented by formula (2), and (B) 0.001-10 parts by mass of a blocked isocyanate silane compound, yields a coating film having exceptional hydrophilicity, anti-fogging properties, and water resistance.(R1 represents a hydrogen atom or a methyl group, R2 represents a C1-6 alkyl group, X1 represents —NH— or —O—, n represents an integer of 1-6, Y1− represents a monovalent anion, R3 represents a hydrogen atom or a methyl group, X2 represents —NH— or —O—, Y2 represents a monovalent functional group selected from the group consisting of hydrogen atoms, hydroxyl groups, carboxy groups, amino groups, acid anhydride groups, and alkoxysilyl groups, and m represents an integer of 0-10. However, when m is 0, Y2 is a hydrogen atom. An asterisk * represents bonding to an adjacent structural unit.)