Biorenewable Polyester Polyols for High-Performance Urethanes
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Solution Overview
Problem
There is a reluctance to use products and feedstocks derived from renewable biological sources in the urethane industry due to perceived concerns about poor physical properties, such as tensile strength, elongation, adhesion, and abrasion resistance, which are often addressed by diluting them with petroleum-based alternatives.
Innovation Solution
A method for manufacturing polyester polyols with high biorenewable content using succinic acid, 1,3-propanediol, and isosorbide, which are derived from biological sources, to produce high-performance two-component polyurethanes, thermoplastic urethanes, polyurethane dispersions, and polyester acrylates, achieving superior mechanical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If products and feedstocks derived from renewable biological sources are used, then environmental sustainability is improved, but physical properties such as tensile strength, elongation, adhesion, and abrasion resistance deteriorate
Solution Approach 1:
The patent changes the chemical parameters of the polyester polyol by incorporating specific biorenewable monomers (succinic acid, isosorbide, 1,3-propanediol) in optimized ratios and molecular weights to achieve both high biobased content (≥95%) and superior mechanical properties, eliminating the need for dilution with petroleum-based alternatives
Solution Approach 2:
The invention creates a composite molecular structure within the polyester polyol by combining multiple biorenewable monomers with complementary properties: succinic acid provides chain flexibility, isosorbide introduces rigid cyclic structures for strength, and 1,3-propanediol offers optimal chain length and reactivity, resulting in a synergistic material that meets both sustainability and performance requirements
2Quantity of substance
If polyester polyols with high biorenewable content are manufactured, then renewable resource utilization is improved, but manufacturing complexity increases due to the need for specialized synthesis processes
Solution Approach 1:
The patent employs preliminary action by pre-synthesizing specific diol components (including isosorbide and 1,3-propanediol) and pre-mixing them with succinic acid in predetermined ratios before the main polycondensation reaction, which simplifies the overall manufacturing process and ensures consistent high biobased content (≥95%) without requiring complex real-time process control
Solution Approach 2:
The invention optimizes key synthesis parameters including maintaining specific temperature ranges (200-250°C), controlling moisture content below 0.05%, and using catalyst systems with controlled concentrations to achieve high molecular weight polyesters with narrow polydispersity, thereby simplifying the manufacturing process while ensuring product consistency
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 resulting polyester polyols exhibit desirable physical properties, including high tensile strength, elongation, and adhesion, making them suitable for high-performance urethane systems while maintaining a high biorenewable content, thus addressing the industry's concerns about renewable materials.
Implementation Method 1
A process for manufacturing a number of polyester polyols using the feedstocks derived from biological sources
Implementation Method 2
The polyester polyols derived from biological sources are useful in a number of applications including the synthesis of two component polyurethanes, thermoplastic urethanes, polyurethane dispersions, polyester acrylates and polyester urethane acrylates
Data Source
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AI summary
This invention provides a process for manufacturing high performance polyester polyols with high proportion of renewable content derived from biological sources. The polyester polyols with high content of renewable biological materials produced according to the present invention display no color or odor issues and are used in the manufacture of two component polyurethanes, thermoplastic urethanes, polyurethane dispersions and polyester and polyester/urethane acrylates with outstanding physical properties.