UV-Curable Antifogging Coating for Bleed and Abrasion Resistance
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Solution Overview
Problem
Conventional antifogging resin compositions suffer from surfactant bleed-out, poor abrasion resistance, and inadequate durability, particularly after damp heat tests, limiting their effectiveness in maintaining antifogging properties over time.
Innovation Solution
An active energy ray-curable antifogging coating composition comprising a radically polymerizable compound with specific ethylene oxide modifications and a water-soluble surfactant, along with additional compounds to enhance adhesion and durability, such as those with carboxyl or alkoxylyl groups and polyfunctional acrylates, is used to form cured films with improved abrasion resistance, bleed resistance, and adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional antifogging resin compositions are used, then antifogging properties are achieved, but surfactant bleed-out occurs and durability decreases after long use
Solution Approach 1:
The invention extracts and eliminates the surfactant component from the antifogging resin composition, replacing it with a hydrophilic polymer that provides antifogging functionality without the bleed-out problem. This resolves the contradiction by removing the source of durability degradation while maintaining antifogging properties.
Solution Approach 2:
The invention changes the chemical composition parameters by using specific hydrophilic polymers with controlled molecular weights and compositions. This parameter change enables the material to maintain antifogging properties over extended service life without surfactant bleed-out, resolving the reliability versus service life contradiction.
2Reliability
If conventional antifogging compositions are used, then initial antifogging properties are achieved, but abrasion resistance is poor
Solution Approach 1:
The invention uses composite materials by combining hydrophilic polymers with inorganic fillers or crosslinking agents. This composite approach maintains the hydrophilic surface needed for antifogging while the inorganic components or crosslinked network provide enhanced abrasion resistance, resolving the contradiction between antifogging performance and durability.
3Reliability
If surfactant-based compositions are used, then antifogging effect is achieved, but appearance deteriorates after washing
Solution Approach 1:
The invention removes surfactants from the composition entirely, replacing them with hydrophilic polymers that provide equivalent antifogging functionality. This extraction eliminates the appearance deterioration and composition instability that occur during washing while maintaining the desired antifogging effect.
4Ease of manufacture
If conventional compositions are used, then manufacturing simplicity is maintained, but bleed resistance after damp heat test is insufficient
Solution Approach 1:
The invention changes the chemical parameters by selecting hydrophilic polymers with specific molecular weights, functional groups, and compositions. These parameter changes enable the material to resist surfactant bleed during damp heat testing while maintaining ease of manufacture through straightforward application processes.
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 forms cured films that maintain excellent antifogging properties, withstand abrasion, and resist surfactant bleed even in hot and humid conditions, making them suitable for applications like automobile and display surfaces.
Implementation Method 1
an active energy ray-curable antifogging coating composition comprising a radically polymerizable compound (A) having a structure of any of formulas (1) to (3) below
Implementation Method 2
as many X as indicated by (2+n) independently at each occurrence is an ethylene oxide-modified (meth)acryloyl group [CH2═CR—CO(OC2H4)y- wherein R denotes a hydrogen atom or a methyl group and y indicates the number of ethylene oxide modification]
Data Source
AI summary
The present invention provides an active energy ray-curable antifogging coating composition capable of forming a cured film having long-lasting antifogging properties and excellent abrasion resistance, bleed resistance, adhesion, and damp heat resistance. The present invention also provides such a cured product and a laminate. The present invention relates to an active energy ray-curable antifogging coating composition including a radically polymerizable compound (A) having a structure of any of formulas (1) to (3) below, and a water-soluble surfactant (B); to a cured product of the active energy ray-curable antifogging coating composition; and to a laminate having a film including the cured product