Optical Material Polymerizable Composition Blue Light Blocking
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Solution Overview
Problem
Existing optical materials face challenges in productivity due to insufficient solubility of ultraviolet absorbers, leading to a trade-off between productivity and the effectiveness of blocking blue light of approximately 420 nm from harmful ultraviolet rays.
Innovation Solution
A polymerizable composition comprising an isocyanate compound, an active hydrogen compound, and ultraviolet absorbers with a maximum absorption peak between 350 nm and 370 nm, which improves the solubility and dispersibility of the ultraviolet absorbers, enhancing the blocking effect of blue light while maintaining high productivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the amount of ultraviolet absorber is increased to improve blue light blocking effect, then the effectiveness of blocking blue light is improved, but the productivity decreases due to insufficient solubility and extended dissolving time
Solution Approach 1:
The patent changes the chemical structure parameters of the ultraviolet absorber by introducing specific substituents (tert-butyl group at position 3, chlorobenzotriazole group at position 5) on the phenol ring. This structural modification optimizes the balance between solubility in the resin system and blue light absorption efficiency, allowing effective blue light blocking without compromising productivity
Solution Approach 2:
The patent creates a composite system by combining the specifically structured ultraviolet absorber compound with the resin base material. This composite approach ensures that the ultraviolet absorber is effectively integrated into the resin matrix, achieving both high solubility for productivity and sufficient concentration for blue light blocking effectiveness
2Productivity
If the amount of ultraviolet absorber is reduced to improve productivity, then the productivity is improved, but the effect of blocking blue light of approximately 420 nm becomes insufficient
Solution Approach 1:
The patent modifies the molecular structure of the ultraviolet absorber by adding a tert-butyl group and a chlorobenzotriazole group to the phenol backbone. These structural changes enhance the compound's solubility characteristics and light absorption properties, enabling effective blue light blocking at lower concentrations that maintain productivity
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 results in an optical material with excellent blue light blocking capabilities, high refractive index, Abbe number, and heat resistance, providing a transparent and colorless plastic lens with improved optical characteristics.
Implementation Method 1
one or more types of ultraviolet absorber represented by General Formula (1) and having a maximum absorption peak in a range of equal to or more than 350 nm and equal to or less than 370 nm
Implementation Method 2
A polymerizable composition for an optical material including (A) an isocyanate compound, (B) an active hydrogen compound
Data Source
AI summary
A polymerizable composition for an optical material including (A) an isocyanate compound; (B) an active hydrogen compound; and (C) one or more types of ultraviolet absorber represented by General Formula (1) and having a maximum absorption peak in a range of equal to or more than 350 nm and equal to or less than 370 nm. (In General Formula (1) above, R1 and R2 represent an alkyl group having 1 to 8 carbon atoms and may be same or different from each other, a plurality of R1 present or a plurality of R2 present may be same or different, m represents an integer of 0 to 3, n represents an integer of 0 to 3, and R3 represents a functional group having 2 to 15 carbon atoms which includes an ester bond.)