Antireflective Coating Composition Phase Separation
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Solution Overview
Problem
Existing anti-reflection films require complex multi-layer manufacturing processes and suffer from weak interfacial adhesion, leading to delamination issues, and existing single-coating solutions struggle with phase separation and functionality.
Innovation Solution
An anti-reflective coating composition comprising hollow particles coated with a fluorine-based compound, a photopolymerizable compound, and a solvent, which allows for smooth phase separation into multiple layers during a single coating process, enhancing interfacial bonding and scratch resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a multi-layer structure (hard coat layer, high refractive index layer, low refractive index layer) is used, then anti-reflection performance is improved, but manufacturing process complexity increases
Solution Approach 1:
The patent combines multiple functional layers (hard coat layer and low refractive index layer) into a single coating composition that can be applied in one wet coating process. The composition contains polymer resin, inorganic particles for hardness, and hollow particles for low refractive index, all integrated in one formulation that phase-separates during drying to form the multi-layer structure automatically.
Solution Approach 2:
The single coating composition is designed to phase-separate into distinct layers during the drying process. The inorganic particles and hollow particles separate into different regions, forming a multi-layer structure with a hard coat layer containing inorganic particles and a low refractive index layer containing hollow particles, achieving layer segmentation without multiple coating steps.
2Ease of manufacture
If a wet method with separate processes for each layer is used, then manufacturing cost is reduced, but interfacial adhesion deteriorates
Solution Approach 1:
The patent merges multiple coating processes into a single wet coating step by formulating a unified composition containing all necessary components (polymer resin, inorganic particles, hollow particles). This single coating process eliminates the need for separate processes for each layer, reducing manufacturing complexity while maintaining strong interfacial adhesion throughout the film structure.
Solution Approach 2:
The coating composition is a composite material containing polymer resin as binder, inorganic particles for hardness, and hollow particles for low refractive index. This composite structure allows all functional components to be integrated in one layer that phase-separates during drying, achieving both cost reduction and strong interfacial adhesion.
3Productivity
If a single coating process is used, then manufacturing process is simplified, but phase separation is not smooth leading to functional deterioration
Solution Approach 1:
The patent carefully controls composition parameters including the types and amounts of polymer resin, inorganic particles, and hollow particles. By adjusting these parameters, the composition achieves optimal phase separation behavior during drying, forming distinct layers with proper functional distribution. The refractive index and surface energy of components are specifically selected to facilitate smooth phase separation.
Solution Approach 2:
The single coating composition is designed with components that have different local properties - inorganic particles for hardness in the hard coat layer, hollow particles for low refractive index in the low refractive index layer. During phase separation, these components automatically distribute to appropriate regions based on their physical and chemical properties, achieving local quality differentiation without multiple coating steps.
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 solution enables the formation of a film with excellent scratch resistance and anti-reflection properties through a simplified manufacturing process, minimizing delamination and improving reflectivity reduction.
Implementation Method 1
hollow particles coated with a fluorine-based compound having refractive index of 1.3∼1.4
Implementation Method 2
surface tension of 10∼25 mN/m on the surface
Implementation Method 3
a photopolymerizable compound, a photopolymerization initiator
Data Source
AI summary
This disclosure relates to an anti-reflective coating composition that is divided into at least two layers through phase separation after monolayer coating, more particularly an anti-reflective coating composition comprising hollow particles coated with a fluorine-based compound having refractive index of 1.3~1.4 and surface tension of 10-25 mN/m on the surface, an anti-reflection film manufactured therefrom, and a method of manufacturing the same. In the anti-reflective coating composition of the present invention, at least two layers may be spontaneously formed only by single coating due to smooth phase separation in the coating layer. Particularly, since an interface of each layer formed by phase separation is substantially chemically bonded or crosslinked, delamination of each layer may be minimized. And, a film with excellent scratch resistance and anti-reflection may be manufactured by a more simplified method using the anti-reflective coating composition of the present invention.