Biomass-Derived Polyester Polyol Aldehyde Control
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Solution Overview
Problem
Conventional methods for producing polyester polyol from biomass resources face challenges in achieving favorable reactivity and physical properties in polyurethane resins, particularly due to the influence of co-existing compounds and high purification requirements, leading to increased costs and quality issues.
Innovation Solution
A method involving the use of a polyester polyol with a specific aliphatic diol unit, such as 1,10-decanediol, and controlled aldehyde content (0.01-0.5% by weight) derived from biomass resources, which enhances reactivity and physical properties like flexibility, mechanical strength, and chemical resistance in polyurethane production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If biomass-derived materials are used to produce polyester polyol, then environmental sustainability is improved, but purification complexity and cost increase due to high impurity content
Solution Approach 1:
The invention changes the chemical parameters of the biomass-derived diol by controlling the aldehyde content within a specific range (0.01-1% by weight). This parameter optimization allows the material to achieve both sustainability and acceptable purity without requiring complex purification processes, as the aldehyde groups naturally present in biomass materials are utilized rather than removed.
Solution Approach 2:
The invention converts the harmful impurities (aldehyde groups) naturally present in biomass-derived diols into beneficial functional groups that enhance polyurethane reactivity. Instead of removing these aldehyde groups through complex purification, the invention utilizes them to form acetal structures that improve both reactivity and physical properties of the final product.
2Manufacturing precision
If high-level purification is applied to biomass-derived polyester polyol, then purity is improved, but production cost increases and physical properties deteriorate
Solution Approach 1:
The invention optimizes the purity parameter by establishing a specific aldehyde content range (0.01-1% by weight) rather than requiring complete removal of impurities. This parameter change achieves the best balance between purity and cost, avoiding expensive purification steps while maintaining acceptable quality for industrial applications.
3Ease of operation
If conventional polyester polyol production methods are used, then production simplicity is maintained, but reactivity and color tone of the resulting polyurethane are unfavorable
Solution Approach 1:
The invention changes the chemical composition parameters of the polyester polyol by specifying a particular aldehyde content range (0.01-0.5% by weight in the final product, corresponding to 0.01-1% in the starting diol). This parameter optimization simultaneously improves polymerization reactivity and color tone without complicating the production process, as the aldehyde groups are naturally present in biomass-derived diols.
4Reliability
If aldehyde content in polyester polyol is increased to improve reactivity, then polymerization reactivity is improved, but color tone deteriorates
Solution Approach 1:
The invention precisely optimizes the aldehyde content parameter within a narrow range (0.01-0.5% by weight in the polyester polyol). This precise parameter control achieves the optimal balance between reactivity enhancement and color tone maintenance, where the lower bound (0.01%) ensures sufficient reactivity improvement while the upper bound (0.5%) prevents excessive color degradation.
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 approach results in a polyester polyol with improved reactivity and color tone, producing polyurethanes with excellent balance of flexibility, mechanical strength, chemical resistance, and hot-water resistance, suitable for industrial applications in materials like elastic fibers and synthetic leathers.
Implementation Method 1
by producing a polyester polyol by polycondensing a dicarboxylic acid with a biomass-resource-derived aliphatic diol containing 0.01 to 1% by weight aldehyde body
Implementation Method 2
a polyester polyol which contains a particular aliphatic diol unit and in which the aldehyde body content in the polyester polyol is 0.01 to 0.5% by weight
Data Source
AI summary
The present invention aims to provide a polyester polyol having favorable reactivity and a favorable color tone, which can be used for obtaining a polyurethane having an excellent balance of flexibility, mechanical strength, and chemical resistance, and a method for producing the polyester polyol. The object can be achieved with a polyester polyol in which an aliphatic diol contains as a structural unit 1,10-decanediol derived from a biomass resource, and in which the aldehyde body content in the polyester polyol is 0.01 to 0.5% by weight, and a method for producing the polyester polyol.