Thioepoxy Storage Stability via Water and Temperature Control
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Solution Overview
Problem
Thioepoxy-based optical materials suffer from transparency reduction and thermal instability due to uncontrolled polymerization rates and imbalance, which are exacerbated by storage temperature and water content, leading to undesirable coloring and thermal strain.
Innovation Solution
A method for storing thioepoxy compounds with a controlled water content of 500 to 2,500 ppm at temperatures between -78°C and 10°C to inhibit time-dependent changes, thereby stabilizing the material and preventing unwanted polymerization reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If thioepoxy compound is stored at higher temperatures or with higher water content, then storage ease is improved, but time-dependent change increases leading to coloring and transparency reduction
Solution Approach 1:
The patent applies parameter changes by precisely controlling storage temperature (ranging from -78°C to 20°C depending on water content) and water content (50-5000 ppm) of the thioepoxy compound. By adjusting these parameters within specific ranges, the invention achieves optimal balance between storage ease and prevention of time-dependent changes that cause coloring and transparency reduction.
Solution Approach 2:
The patent implements preliminary anti-action by pre-controlling the water content and storage temperature before polymerization occurs. This preliminary control prevents time-dependent changes and polymerization imbalance from developing during storage, thereby preventing coloring and transparency reduction before they can occur.
2Device complexity
If thioepoxy compound is stored without water content control, then storage simplicity is improved, but polymerization imbalance occurs leading to thermal strain
Solution Approach 1:
The patent applies parameter changes by establishing specific water content ranges (50-5000 ppm) and temperature ranges (-78°C to 20°C) for storing thioepoxy compounds. By controlling these parameters, the invention prevents polymerization imbalance and thermal strain while maintaining manageable storage complexity through defined operational windows.
3Duration of action of stationary object
If uncontrolled polymerization occurs during storage, then storage duration is extended without special precautions, but transparency and thermal stability deteriorate
Solution Approach 1:
The patent applies parameter changes by controlling storage temperature within -78°C to 20°C and water content within 50-5000 ppm. These parameter controls suppress unwanted polymerization during storage, enabling long-term storage (extending shelf life) while maintaining the reliability of transparency and thermal stability.
Solution Approach 2:
The patent implements preliminary action by pre-establishing controlled storage conditions before polymerization can occur. This preliminary control of temperature and humidity prevents polymerization imbalance during storage, ensuring that when the material is eventually used, it maintains high transparency and thermal stability.
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
This approach results in a high-quality, colorless, and transparent thioepoxy-based optical material with enhanced thermal stability and reduced time-dependent changes, maintaining storage stability for up to 3 years.
Implementation Method 1
a method of preparing a thioepoxy based optical material which uses the episulfide compound and exhibits less time-dependent change and is colorless and transparent
Data Source
AI summary
Disclosed are a method of storing a thioepoxy compound and a method of preparing a thioepoxy based optical material using the thioepoxy compound. Particularly, a method of preparing a high-quality thioepoxy based optical material having superior color and thermal stability and less time-dependent change, and being colorless and transparent by inhibiting time-dependent change of the thioepoxy compound during storage is disclosed. In addition, a method of storing the thioepoxy compound for an optical material, the thioepoxy compound having a water content of 500 to 2,500 ppm and stored at -78 to 10°C, and a method of preparing the thioepoxy based optical material, the method including polymerizing a polymerizable composition including the stored thioepoxy compound, are provided. The high-quality thioepoxy based optical material, which is colorless and transparent, prepared according to the present invention may be broadly used in a variety of fields as a substitute for conventional optical materials.