Thiourethane Resin Reprocessing With Active Hydrogen Compounds

Solution Overview

Problem

The generation of thiourethane resin-containing cut powder and defective formed/processed articles as waste in lens production processes leads to inefficient material utilization, with conventional methods involving incineration or burial, and there is a need for technologies to recycle these materials into thiourethane resin raw materials.

Innovation Solution

A method of producing thiourethane resin raw materials by reacting thiourethane resin with active hydrogen compounds, optionally after classification, sieving, and washing, to generate a thiourethane resin raw material suitable for producing polymerizable compositions and lenses.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If thiourethane resin waste is incinerated or buried as industrial waste, then waste disposal is simplified, but material utilization efficiency deteriorates and environmental harm increases

Engineering Contradiction:

Improvewaste disposal simplicityVSAvoidmaterial utilization efficiency

Core Design Contradiction:

Ease of manufactureVSLoss of substance

Solution Approach 1:

The patent recovers thiourethane resin from waste materials (cut powder, defective articles) and transforms it back into usable raw materials through chemical decomposition and synthesis reactions, enabling cyclic utilization of materials

Inventive Principle:

Principle #34Discarding and recovering

Solution Approach 2:

The patent converts harmful waste materials (cut powder and defective articles that would be incinerated or buried) into beneficial raw materials for producing new lenses, transforming an environmental problem into a resource opportunity

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

2Ease of manufacture

If thiourethane resin waste is incinerated or buried, then waste processing is simple, but greenhouse gas emissions and environmental harm increase

Engineering Contradiction:

Improvewaste processing simplicityVSAvoidgreenhouse gas emissions

Core Design Contradiction:

Ease of manufactureVSObject-generated harmful factors

Solution Approach 1:

The patent recovers thiourethane resin from waste materials (cut powder, defective articles) and transforms it back into usable raw materials through chemical decomposition and synthesis reactions, enabling cyclic utilization of materials

Inventive Principle:

Principle #34Discarding and recovering

Solution Approach 2:

The patent converts harmful waste materials (cut powder and defective articles that would be incinerated or buried) into beneficial raw materials for producing new lenses, transforming an environmental problem into a resource opportunity

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Productivity

If conventional lens production processes are used, then production efficiency is maintained, but waste generation increases

Engineering Contradiction:

Improveproduction efficiencyVSAvoidwaste generation

Core Design Contradiction:

ProductivityVSLoss of substance

Solution Approach 1:

The patent recovers thiourethane resin from waste materials (cut powder, defective articles) and transforms it back into usable raw materials through chemical decomposition and synthesis reactions, enabling cyclic utilization of materials

Inventive Principle:

Principle #34Discarding and recovering

Solution Approach 2:

The patent creates a dual-purpose system where the chemical processing apparatus can handle both conventional raw materials and recycled resin materials, making the production system versatile in accepting different material inputs

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 method enables the recycling of thiourethane resin waste into valuable raw materials, reducing waste disposal and greenhouse gas emissions, and allows for the production of high-performance polymerizable compositions and lenses.

Implementation Method 1

reacting a thiourethane resin and an active hydrogen compound with each other to generate a thiourethane resin raw material

Methodology Applied

Scientific EffectChemical reaction: Chemical Bonding

Data Source

PatentUS12534431B2Method of producing thiourethane resin raw material and application thereof, method of producing polythiol composition and application thereof, and polythiol composition

Publication Date: 2026.01.27 MITSUI CHEMICALS INC

AI summary

A method of producing a thiourethane resin raw material, the method including comprising the step of generating the thiourethane resin raw material by reacting a thiourethane resin and an active hydrogen compound with each other.