Polythiol and Polyamine Production with Easily Removed Decomposing Agents
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Solution Overview
Problem
Existing methods for producing polythiol and polyamine compounds from thiourethane resins face challenges in effectively removing decomposing agents like amine or alcohol compounds from the reaction system, necessitating improved removability.
Innovation Solution
A method involving the use of specific decomposing agents represented by Formulas (1) or (2) under elevated pressure to generate polythiol or polyamine compounds, facilitating easy removal of the decomposing agents through volatilization or distillation, and incorporating a tertiary amine compound as a decomposition aid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a decomposing agent (amine compound or alcohol compound) is used to decompose thiourethane resin, then polythiol composition or polyamine compound can be produced, but the decomposing agent becomes difficult to remove from the reaction system
Solution Approach 1:
The patent changes the chemical structure parameters of the decomposing agent by specifying particular formulas (Formula 1 with specific R1-R6 groups, Formula 2 with specific R3-R10 groups) that enable easier removal. This structural parameter change allows the decomposing agent to be more effectively separated from the reaction system while maintaining its decomposing function.
Solution Approach 2:
The patent utilizes phase transition properties of the decomposing agent to facilitate its removal from the reaction system. By selecting decomposing agents with specific phase characteristics (such as volatility differences), the agent can be separated through phase change processes like distillation or evaporation, resolving the removal difficulty.
2Productivity
If conventional decomposing agents are used, then decomposition reaction can proceed, but the reaction system requires complex separation processes
Solution Approach 1:
The patent modifies parameters of the decomposing agent (chemical structure, molecular weight, functional groups) to optimize the decomposition reaction efficiency while simultaneously simplifying the separation process. The specific formulas provided enable both high productivity and reduced process complexity.
Solution Approach 2:
The patent employs decomposing agents with structures that are easier to separate and remove, essentially creating a 'simpler version' that maintains the core decomposing function but eliminates the separation complexity issue. The agents in Formula 1 and Formula 2 are designed to be more readily removable than conventional agents.
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 method achieves excellent ability to remove decomposing agents from the reaction system, resulting in high-purity polythiol or polyamine compounds suitable for producing optical materials, enabling efficient recycling and improved material utilization.
Implementation Method 1
a generation step of generating a polythiol composition by decomposing a thiourethane resin using a decomposing agent
Implementation Method 2
facilitating easy removal of the decomposing agents through volatilization or distillation
Implementation Method 3
facilitating easy removal of the decomposing agents through volatilization or distillation
Data Source
AI summary
A method of producing a polythiol composition, comprising a generation step of generating a polythiol composition by decomposing a thiourethane resin using a decomposing agent represented by the following Formula (1) or (2). In Formula (1), R1 and R2 each independently represent a hydrogen atom, an alkyl group having from 1 to 3 carbon atoms, or an amino group, excluding a case in which, and in Formula (2), R3 represents an alkyl group having from 1 to 3 carbon atoms. R3-OH (2)