Polyester Resin Low-Temperature Solubility via Isosorbide and Trihydric Alcohol Units
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Solution Overview
Problem
Polyester resins with biomass-derived monomers, such as those described in Patent Literature 1, lack sufficient solubility in generic solvents, especially at low temperatures, requiring heating or use in warm conditions, which limits their application in cold regions.
Innovation Solution
A polyester resin formulation that includes specific ratios of isosorbide-derived and trihydric or higher alcohol-derived structural units relative to polycarboxylic acid-derived units, along with structural units from dihydric alcohols with alicyclic skeletons, enhances solubility at temperatures below 0°C, achieving improved storage stability and moisture resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If polyester resin is made from biomass-derived monomers (isosorbide), then environmental sustainability is improved, but solubility in generic solvents at low temperatures deteriorates
Solution Approach 1:
The patent creates a composite polyester resin structure combining isosorbide-derived units (for sustainability) with trihydric or higher alcohol-derived units (for solubility enhancement). This composite approach allows the resin to maintain both environmental benefits and improved low-temperature solubility through the synergistic effect of different structural units working together
Solution Approach 2:
The patent changes the compositional parameters of the polyester resin by controlling the molar ratios of different structural units. Specifically, it optimizes the content of isosorbide-derived units (0.1-0.5 mol) and trihydric or higher alcohol-derived units (0.03-0.3 mol) relative to polycarboxylic acid units to achieve the desired balance between sustainability and solubility performance
2Adaptability or versatility
If polyester resin contains isosorbide-derived structural units, then biomass utilization is improved, but solubility in generic solvents deteriorates
Solution Approach 1:
The patent combines isosorbide-derived structural units with trihydric or higher alcohol-derived structural units in a specific composite structure. This composite design allows the resin to maintain high biomass utilization from isosorbide while the trihydric alcohol units provide enhanced solubility in generic solvents, resolving the contradiction between biomass content and solubility
3Adaptability or versatility
If polyester resin is formulated for cold region use, then application range is improved, but heating requirements are eliminated only if solubility is enhanced
Solution Approach 1:
The patent changes the chemical composition parameters of the polyester resin by incorporating trihydric or higher alcohol-derived units in controlled amounts (0.03-0.3 mol relative to polycarboxylic acid units). This compositional change reduces the glass transition temperature and enhances chain flexibility, allowing the resin to maintain solubility at low temperatures without requiring heating during application
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 improved solubility of the polyester resin at low temperatures facilitates the preparation of paints and coating materials, ensuring they remain usable and effective in cold conditions without the need for heating, thereby expanding their application range.
Implementation Method 1
exhibits excellent solubility under low-temperature conditions, especially at or lower than 0° C.
Data Source
AI summary
The present invention relates to a polyester resin with excellent solubility in generic solvents, especially with excellent solubility at a temperature of 0° C. or lower. According to the present invention, by using the polyester resin with excellent solubility in generic solvents, solubility at a lower temperature, especially the solubility at a temperature of 0° C. or lower, is enhanced, making it easier to prepare paints, coatings and the like. The polyester resin related to the present invention contains 0.05 to 0.5 mol of an isosorbide-derived structural unit and 0.015 to 0.4 mol of a trihydric or higher alcohol-derived structural unit relative to 1 mol of a polycarboxylic acid-derived structural unit.