Robust Branched Polyester Resin for Solvent-Free Emulsification
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Solution Overview
Problem
Current polyester latex production methods are costly and environmentally unfriendly due to solvent-based approaches, and many polyesters suffer significant molecular weight degradation during solvent-free emulsification processes, limiting their application in industries like coatings and pharmaceuticals.
Innovation Solution
Development of a robust branched polyester resin with alcohol-derived or acid-derived branching sites that resist degradation during solvent-free emulsification, achieved by specific branching agents and processing methods, allowing for the production of polyester latex with minimal molecular weight loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If solvent-free emulsification process is used, then cost-effectiveness and environmental friendliness are improved, but molecular weight degradation of polyester increases
Solution Approach 1:
The patent modifies the chemical structure parameters of polyester by introducing specific branching sites (alcohol-derived or acid-derived) that change the polymer's resistance to degradation during solvent-free emulsification, allowing the process to remain cost-effective while preserving molecular weight
Solution Approach 2:
The patent creates a composite polyester structure combining linear chains with specific branching sites, resulting in a robust resin that maintains both processability in solvent-free emulsification and resistance to molecular weight degradation
2Stability of the object's composition
If solvent-based phase inversion emulsification process is used, then molecular weight degradation is reduced, but production cost increases significantly
Solution Approach 1:
The patent changes the chemical parameters of polyester to include specific branching sites, enabling the material to withstand solvent-free emulsification without severe molecular weight degradation, thereby eliminating the need for expensive solvent-based processes
Solution Approach 2:
The patent converts the previously harmful solvent-free emulsification process into a beneficial method by designing polyester with branching sites that prevent degradation, turning a cost-effective but damaging process into a cost-effective and preserving method
3Strength
If higher molecular weight polyester is used, then resin performance is improved, but degradation during solvent-free process increases
Solution Approach 1:
The patent creates a composite polyester structure with high molecular weight linear chains combined with specific branching sites, achieving both improved resin performance and resistance to degradation during solvent-free processing
Solution Approach 2:
The patent modifies the molecular architecture parameters by introducing branching sites at specific positions, allowing high molecular weight resins to maintain their performance benefits while becoming resistant to degradation in solvent-free emulsification
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 robust resin design enables the production of polyester latex with less than 20% molecular weight degradation, making it suitable for various industrial applications while being cost-effective and environmentally friendly.
Implementation Method 1
the branched polyester contains at least one of alcohol-derived branching sites or acid-derived branching sites that limit or prevent altogether degradation of the polyester during solvent-free emulsification processes
Data Source
AI summary
A branched polyester suitable for use in solvent-free emulsification, the branched polyester having a first original weight average molecular weight before undergoing solvent-free emulsification and a second weight average molecular weight after undergoing solvent-free emulsification, wherein the branched polyester has a structure that limits degradation of the polyester during solvent-free emulsification to less than about 20 percent of the first original weight average molecular weight, wherein the branched polyester comprises a compound of the formula described.