Acid-Resistant Polyurethane Copolymer for Strength Retention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing polyurethane materials derived from polytetramethylene ether glycol are susceptible to degradation from acid exposure, leading to a decrease in physical properties such as strength and stretchability, and there is a need for materials with improved acid resistance and reduced environmental burden.
Innovation Solution
The development of acid-resistant polyurethane using a copolymer of tetrahydrofuran and 2-methyltetrahydrofuran, with a biobased carbon content of 95% to 100%, which maintains or enhances breaking strength and elongation after acid treatment, produced from biomass-derived raw materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If polytetramethylene ether glycol is used as raw material for polyurethane, then excellent softness and elongation characteristics are achieved, but acid resistance deteriorates due to degradable ether binding sites
Solution Approach 1:
The patent changes the chemical structure parameter of the polytetramethylene ether glycol by incorporating 2-methyltetrahydrofuran units, which have enhanced acid resistance compared to conventional tetrahydrofuran-based structures, while maintaining the desired softness and elongation properties
Solution Approach 2:
The patent creates a composite polyurethane material by copolymerizing tetrahydrofuran and 2-methyltetrahydrofuran units in specific ratios (97:3 to 88:12), combining the benefits of both structures to achieve both softness and acid resistance
2Reliability
If polyurethane materials are designed with excellent environmental resistance, then acid resistance improves, but environmental burden increases due to conventional production methods
Solution Approach 1:
The patent changes the origin parameter of the raw materials by using biomass-derived 2-methyltetrahydrofuran with 95% or more biobased carbon content, reducing dependence on petroleum resources and lowering the environmental burden while achieving enhanced environmental resistance
Solution Approach 2:
The patent converts the potential vulnerability of ether binding sites to acid degradation into a benefit by strategically incorporating 2-methyltetrahydrofuran units that provide both acid resistance and environmental friendliness, turning a previously harmful chemical structure into an advantageous feature
Data Source
AI summary
An acid-resistant polyurethane is obtained by using an acid-resistant polytetramethylene ether glycol comprising a copolymer of tetrahydrofuran and 2-methyltetrahydrofuran, wherein the retention rate of breaking strength or breaking elongation before and after acid treatment is 100% to 200%, and the method for producing the polyurethane is provided.