Episulfide Optical Lens Composition for Low-Haze Curing
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Solution Overview
Problem
Existing episulfide-based optical materials and cured products suffer from high haze, which affects their optical clarity and performance.
Innovation Solution
An episulfide composition containing optically active compounds with specific asymmetric carbon configurations and peak area ratios, optimized for reduced haze and improved curability, is used to produce a polymerizable composition that results in a cured product with reduced haze and enhanced properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional episulfide compounds are used to produce optical materials, then the materials achieve good refractive index, but the cured products exhibit high haze that reduces optical clarity
Solution Approach 1:
The patent changes the stereochemical parameters of the episulfide compound by specifying precise peak area ratios of optical isomers (RS: 10-50%, RR: 30-70%, SS: 10-50%) to control the molecular arrangement in the cured product, thereby reducing haze while maintaining refractive index
Solution Approach 2:
The patent utilizes asymmetric carbon atoms in the episulfide compound structure and controls the asymmetry through specific optical isomer ratios, creating a non-random molecular configuration that reduces light scattering and haze in the cured optical material
2Reliability
If conventional episulfide compositions are used, then the manufacturing process is simple, but the curability and handling properties are insufficient
Solution Approach 1:
The patent optimizes the compositional parameters by specifying precise ratios of optical isomers and adding a polymerization catalyst, transforming the composition from a simple single compound to a controlled multi-component system that achieves reliable curability while maintaining manageable complexity
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 episulfide composition achieves a cured product with reduced haze and improved curability, suitable for producing optical materials with high refractive index and excellent optical clarity.
Implementation Method 1
A polymerizable composition comprising the episulfide composition and a polymerization catalyst
Data Source
AI summary
An episulfide composition containing an compound A, wherein: the compound A comprises a sulfide bond, an episulfide ring 1 containing an asymmetric carbon C*1, and an episulfide ring 2 containing an asymmetric carbon C*2, wherein the compound A comprises: at least one of a compound A-SS in which both of the C*1 and the C*2 have an S configuration, or a compound A-RR in which both of the C*1 and the C*2 have an R configuration; and a compound A-RS in which one of the C*1 and the C*2 has an R configuration, and another has an S configuration; and wherein a ratio of a peak area RS of the compound A-RS to a total peak area T of the compound A-SS, the compound A-RR and the compound A-RS, as measured by HPLC, is 10 to 80 area %.