Photocurable Liquid Composition Suppressing Metal Oxide Nanoparticle Localization
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Solution Overview
Problem
The formation of high refractive index materials through curing compositions containing metal oxide particles and (meth)acrylate monomers often results in phase separation, leading to non-uniform cured products due to localization of metal oxide particles.
Innovation Solution
Incorporating a polyfunctional monomer with three or more ethylenically unsaturated double bonds into the photocurable liquid composition, along with metal oxide nanoparticles and a photopolymerization initiator, to suppress the localization of metal oxide nanoparticles and achieve a uniform cured product.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a composition containing metal oxide particles and (meth)acrylate monomer is cured to form a high refractive index material, then the refractive index is improved, but phase separation occurs causing non-uniform cured product
Solution Approach 1:
The patent changes the chemical parameters of the monomer system by introducing a polyfunctional monomer with 3 or more ethylenically unsaturated double bonds. This parameter change modifies the polymerization kinetics and network structure, preventing metal oxide particle aggregation and phase separation while maintaining high refractive index properties in the cured product.
Solution Approach 2:
The patent creates a composite monomer system combining conventional (meth)acrylate monomers with polyfunctional monomers having multiple ethylenically unsaturated double bonds. This composite approach leverages the high refractive index of metal oxide particles while the polyfunctional monomer matrix ensures uniform distribution and prevents phase separation during curing.
2Illumination intensity
If metal oxide particles are dispersed in the composition to achieve high refractive index, then the refractive index is improved, but localization of metal oxide particles occurs
Solution Approach 1:
The patent modifies the monomer composition parameters by incorporating polyfunctional monomers with multiple ethylenically unsaturated double bonds. This changes the polymerization dynamics and network formation process, preventing metal oxide particle localization and ensuring uniform distribution throughout the cured material while maintaining desired refractive index.
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 approach enables the formation of a cured product with suppressed metal oxide nanoparticle localization, resulting in high transparency and refractive index without phase separation, thereby improving the uniformity and optical properties of the cured material.
Implementation Method 1
a photopolymerization initiator (C)
Data Source
AI summary
A photocurable liquid composition capable of forming a cured product in which localization of metal oxide nanoparticles is suppressed, a cured product of the photocurable liquid composition, and a method for producing a cured product using the photocurable liquid composition. As a photopolymerizable monomer, a polyfunctional monomer having 3 or more ethylenically unsaturated double bond is added to the photocurable liquid composition including the photopolymerizable monomer, metal oxide nanoparticles, and a photopolymerization initiator.