Aqueous Anionic–Nonionic Polyester Compositions for Stable Soil Release
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Solution Overview
Problem
Existing polyester compositions used in detergents for soil release properties suffer from stability issues, including increased viscosity and cloudiness during storage, making them difficult to handle and process effectively.
Innovation Solution
Aqueous compositions of selected anionic and nonionic polyesters, stabilized by specific ratios and combinations of monomers, maintain low viscosity and stability over time, preventing thickening and cloud formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If anionic polyesters are dissolved in water to achieve hydrophilicity and transport, then the polyester becomes soluble and can be attached to fibers, but the polyester molecules form aggregates and crystallize in solution, increasing viscosity and causing cloudiness
Solution Approach 1:
The patent introduces nonionic polyesters as intermediary substances that mediate between the anionic polyester and water. These nonionic polyesters have both hydrophilic and hydrophobic characteristics, allowing them to act as solubilizing agents that prevent aggregate formation while maintaining the anionic polyester's ability to attach to fibers
Solution Approach 2:
The invention creates a composite aqueous composition containing both anionic and nonionic polyester components. This composite system combines the soil-release properties of anionic polyesters with the solubilizing and stability-providing characteristics of nonionic polyesters, achieving both solubility and prevention of crystallization
2Ease of operation
If the polyester structure is made hydrophilic enough for water transport, then the polyester can be transported in aqueous medium, but the polyester also becomes hydrophobic enough to attach to fibers, causing semi-solubility and light scattering
Solution Approach 1:
The patent modifies the chemical parameters of the polyester composition by incorporating nonionic polyester components with specific hydrophilic-lipophilic balances. This parameter change allows the composition to maintain adequate hydrophilicity for water transport while reducing the hydrophobic aggregation that causes light scattering and cloudiness
3Stability of the object's composition
If organic solvents are added to stabilize SRP compositions, then storage stability improves, but viscosity increases significantly making the product difficult to handle
Solution Approach 1:
The invention changes the compositional parameters by using nonionic polyesters as stabilizing agents instead of organic solvents. This parameter change achieves storage stability through molecular interactions that prevent crystallization while maintaining low viscosity and good handleability of the aqueous composition
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 compositions remain stable for months without significant viscosity increase, maintaining clarity and preventing deposits, enhancing soil release properties in detergents and cleaning agents.
Implementation Method 1
These polyesters are structured in such a way that they can be attached onto a polymer fiber from an aqueous medium... the polyester molecule in water is likely to be in aggregate form even when it appears dissolved. One consequence of this 'semi-solubility' is crystallization of the polymer chains 'in solution.'
Data Source
AI summary
Aqueous polyester compositions, detergents and cleaning agents containing them and their useDisclosed are aqueous compositions of selected anionic polyesters and of selected nonionic polyesters.These compositions are characterized by good storage stability and low viscosity and can be used in detergents and cleaning agents to improve soil release.