Novel Polythiol Compound for Balanced Heat Resistance and Dyeing
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Solution Overview
Problem
Existing poly(thio)urethane resins face challenges in achieving both high heat resistance and good dyeing properties, as improving one property often compromises the other.
Innovation Solution
A novel polythiol compound is developed, which is synthesized using a different starting material instead of 2-mercapto ethanol, allowing for the regulation of side chain volume and size to enhance heat resistance while maintaining dyeing properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the glass transition temperature is increased to improve heat resistance, then heat resistance is improved, but dyeing properties deteriorate
Solution Approach 1:
The patent applies parameter changes by precisely controlling the glass transition temperature within a specific range (40-80°C) through adjusting the polythiol compound structure and composition. This allows the resin to achieve adequate heat resistance while maintaining dyeing properties, resolving the contradiction between these two parameters.
Solution Approach 2:
The patent uses composite materials by combining the polythiol compound with specific polyisocyanate compounds and additives in controlled ratios. This composite approach enables balancing heat resistance and dyeing properties through synergistic interactions between components, rather than relying on a single parameter adjustment.
2Temperature
If the side chain volume is increased to improve heat resistance, then heat resistance is improved, but the structure becomes more complex
Solution Approach 1:
The patent applies local quality by introducing specific side chain structures (such as alkyl groups with 1-10 carbon atoms) at particular positions in the polythiol compound molecule. This localized structural modification enhances heat resistance without requiring complex changes throughout the entire molecular structure, maintaining simplicity where not needed.
Solution Approach 2:
The patent systematically varies side chain parameters (carbon atom number, branching structure) to optimize heat resistance. By changing these parameters in a controlled manner rather than adopting complex structures, the patent achieves the desired thermal performance with manageable molecular 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 novel polythiol compound secures high heat resistance and excellent dyeing properties for transparent lenses, balancing the glass transition temperature and dyeing performance.
Implementation Method 1
The polythiol or a polyol as an intermediate compound thereof is broadly used for various applications as a raw material for optical bodies, poly(thio)urethane resins or synthetic resins
Implementation Method 2
Rb is —CH2CH(OH)CH2F, —CH2CH(OH)CH2Cl, —CH2CH(OH)CH2Br, —CH2CH(OH)CH2I
Data Source
AI summary
The present invention relates to a novel polyol or polythiol having three or more functional groups, a preparation method there for, and an optical body manufactured therefrom. Especially, the present invention relates to a poly(thio)urethane-based resin and an optical body, such as lenses, manufactured using the resin, wherein the poly(thio)urethane-based resin is prepared by obtaining a novel polyol and then combining a polythiol, which is prepared from the obtained polyol, with a polyiso(thio)cyanate.