Allyl Compound Optical Material Resolving Refractive Index and Dyeability Trade-off
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Plastic lenses with high refractive index and good dyeability are challenging to produce as existing materials with high refractive index often compromise on heat resistance and workability.
Innovation Solution
An allyl compound with an episulfide group is used in a composition for optical materials, combined with an episulfide compound and a polymerization catalyst, to achieve a high refractive index while maintaining enhanced dyeability and heat resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If an episulfide compound is used to achieve high refractive index, then the refractive index increases, but the dyeability deteriorates
Solution Approach 1:
The patent changes the chemical structure parameters of the episulfide compound by introducing specific allyl groups with controlled ratios of structural isomers (compounds of formula (1) where m+n=4, m=0 to 3, n=1 to 4). This structural parameter modification enables the material to achieve high refractive index while maintaining good dyeability, resolving the contradiction between optical performance and manufacturing ease.
2Ease of manufacture
If an allyl compound is added to improve dyeability, then the dyeability increases, but the heat resistance deteriorates
Solution Approach 1:
The patent carefully controls the chemical structure parameters of the allyl compound, specifically the ratio of structural isomers (compounds of formula (1)) within the composition. By optimizing these structural parameters, the invention achieves sufficient dyeability while preventing heat resistance deterioration, thus resolving the contradiction between manufacturing ease and thermal stability.
3Temperature
If conventional resin is used to maintain heat resistance, then the heat resistance is preserved, but the refractive index becomes low
Solution Approach 1:
The patent creates a composite material system combining episulfide compounds with specific allyl compounds (formula (1)) in optimized ratios. This composite approach allows the material to inherit the high heat resistance of the base resin while the added allyl compounds contribute to enhanced dyeability and adjusted optical properties, resolving the contradiction between thermal stability and optical performance.
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 provides an optical material with a high refractive index and improved dyeability without compromising heat resistance, suitable for applications like plastic lenses.
Implementation Method 1
a method for producing an optical material, the method comprising a step of adding 0.0001-10 parts by mass of a polymerization catalyst relative to 100 parts by mass of the composition for an optical material according to <2> above, to allow polymerizing and curing
Data Source
AI summary
The present invention makes it possible to provide a compound represented by formula (1) and a composition for an optical material containing this compound.(Where m+n=4, m represents an integer of from 0 to 3, and n represents an integer of from 1 to 4.) In addition, the present invention makes it possible to provide a method for producing an optical material, the method including a step for adding 0.0001-10 parts by mass of a polymerization catalyst per 100 parts by mass of the composition for an optical material, polymerizing, and curing.