Plant-Derived Polyurethane Optical Material Biomass Transparency Trade-off
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Solution Overview
Problem
Current plastic optical materials derived from fossil resources face challenges in balancing high biomass content with desirable physical properties like transparency and heat resistance, which are essential for environmental sustainability and practical applications.
Innovation Solution
A polymerizable composition comprising plant-derived polyisocyanate, polyol, and (poly)glycerin fatty acid esters, specifically optimized with a modified aliphatic polyisocyanate, isocyanurate trimer content, and controlled molar ratios to produce a polyurethane molded product with enhanced biomass content and improved optical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the degree of biomass is increased in plant-derived materials, then environmental sustainability is improved, but physical properties such as transparency and heat resistance decrease
Solution Approach 1:
The invention changes the chemical composition parameters of the polyurethane system by selecting specific plant-derived polyisocyanates with particular functional group densities and molecular weights, and combining them with specific polyols in controlled ratios. This allows optimization of both biomass content and physical properties through precise parameter control rather than simply increasing biomass indiscriminately
Solution Approach 2:
The invention creates a composite polyurethane system by combining multiple plant-derived components (polyisocyanate and polyol) with complementary properties. The synergistic interaction between these components allows the final material to achieve both high biomass content and improved physical properties that neither component could provide alone
2Object-generated harmful factors
If plant-derived raw materials are used to increase biomass degree, then environmental harmony is improved, but optical properties and performance decrease
Solution Approach 1:
The invention optimizes optical properties by controlling parameters such as the molecular weight distribution, functional group density, and chemical structure of the plant-derived polyisocyanate and polyol components. By adjusting these parameters, the resulting polyurethane achieves both high biomass content and satisfactory optical clarity for lens applications
3Stability of the object's composition
If the degree of biomass is increased, then resource sustainability is improved, but heat resistance decreases
Solution Approach 1:
The invention improves heat resistance while maintaining high biomass content by selecting plant-derived polyisocyanates and polyols with specific chemical structures and crosslinking densities. The controlled polymerization process and component selection create a network structure that enhances thermal stability without compromising the biomass degree
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 achieves a polyurethane molded product with a high degree of biomass, excellent transparency, heat resistance, and balanced optical properties, suitable for applications such as plastic lenses, contributing to environmental sustainability while maintaining performance.
Implementation Method 1
comprising polyisocyanate (a) which is obtained from a plant-derived raw material and includes a modified product of aliphatic polyisocyanate; polyol (d) which is a plant-derived compound; and (poly)glycerin fatty acid esters (e)
Data Source
AI summary
Disclosed is a polymerizable composition for an optical material containing polyisocyanate (a) which is obtained from a plant-derived raw material and includes a modified product of aliphatic polyisocyanate, and polyol (d) which is a plant-derived compound.