Biobased Polyester Polyols for Flexible Elastomers
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Solution Overview
Problem
Conventional polyurethane elastomers and foams, particularly those used in footwear and automotive applications, face challenges with mechanical strength, hydrolytic stability, and energy return due to the use of petrochemical-based materials, which also contribute to environmental concerns and health risks from synthetic plasticizers like phthalates.
Innovation Solution
Development of biobased polyester polyols and plasticizers derived from succinic acid, sebacic acid, and biomass-derived alcohols, which are used to create polyurethane elastomers with high biomass content, improved mechanical properties, and enhanced hydrolytic stability, while minimizing the use of fossil fuels and toxic chemicals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If synthetic plasticizers like phthalates are used to improve polymer flexibility and reduce viscosity, then the polymer processability and flexibility are enhanced, but toxic health effects and environmental pollution increase
Solution Approach 1:
The patent changes the chemical composition parameters of plasticizers by using biobased alternatives (e.g., biobased polyols, biobased dicarboxylic acid esters) instead of conventional synthetic plasticizers. This substitution maintains the desired flexibility and viscosity-reducing properties while eliminating the toxic effects associated with phthalates and other synthetic plasticizers.
Solution Approach 2:
The patent employs composite plasticizer systems combining multiple biobased components (polyols, acid esters, and other additives) to achieve the desired plasticizing effect. This composite approach allows optimization of both performance (flexibility, viscosity) and environmental compatibility by selecting from various renewable feedstocks.
2Productivity
If fossil fuel-based materials are used to produce conventional plastics, then material availability and production scalability are ensured, but greenhouse gas emissions and climate change acceleration increase
Solution Approach 1:
The patent fundamentally changes the carbon source parameter from fossil fuels to renewable biomass feedstocks. By using biobased polyols, biobased dicarboxylic acids, and other renewable materials, the production process maintains scalability while reducing greenhouse gas emissions through the use of carbon recently fixed from the atmosphere by plants.
Solution Approach 2:
The patent utilizes renewable biomass resources that can be sustainably regenerated, allowing the system to serve itself by using naturally replenishing feedstocks rather than depleting finite fossil fuel reserves. This self-renewing approach ensures long-term production sustainability.
3Strength
If conventional petrochemical-based polyurethane elastomers are used to achieve mechanical strength, then tensile strength and durability are maintained, but hydrolytic stability and environmental compatibility deteriorate
Solution Approach 1:
The patent uses composite polyurethane formulations combining biobased polyols with biobased dicarboxylic acid esters and other renewable additives. This composite structure maintains the mechanical strength required for elastomer applications while improving hydrolytic stability through the inherent properties of the biobased components and their molecular architecture.
Solution Approach 2:
The patent changes the chemical composition parameters by substituting petrochemical components with biobased alternatives. The specific selection of biobased polyols and dicarboxylic acid esters provides both the desired mechanical strength and improved hydrolytic stability compared to conventional petrochemical-based polyurethanes.
4Object-affected harmful factors
If biobased plasticizers are used to reduce environmental impact and improve safety, then toxicity is reduced and renewability increases, but plasticizing efficiency and compatibility with polymers may decrease
Solution Approach 1:
The patent employs composite biobased plasticizer systems combining multiple components (biobased polyols, biobased dicarboxylic acid esters, and complementary additives) to achieve plasticizing efficiency comparable to or exceeding conventional plasticizers. The synergistic interaction among components compensates for any individual component limitations while maintaining low toxicity and high renewability.
Solution Approach 2:
The patent optimizes the molecular structure parameters of biobased plasticizers by selecting specific polyol types and acid ester chain lengths to match the polymer matrix being plasticized. This parameter optimization ensures compatible solubility, proper viscosity reduction, and adequate flexibility enhancement while maintaining the environmental and safety advantages of biobased materials.
Data Source
AI summary
A composition comprised of a component selected from the group consisting of a biobased bis-alkyl succinate and a biobased bis-alkyl sebacate, each derived, for example, from the esterification of biobased diacid such as succinic acid or sebacic acid, and a biobased alcohol and a biobased polyester.