Liquid Esterquat Emulsion Stability via Polymer Thickeners
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Solution Overview
Problem
Hair conditioning formulations based on liquid esterquats face challenges with long-term stability and emulsion stabilization, particularly when compared to solid esterquats, leading to poor storage stability and phase separation issues with cationic surfactants.
Innovation Solution
Incorporating carbomers or other polymer thickeners into formulations containing liquid esterquats to enhance stability, allowing for improved emulsion stability and extended use without solvent addition, while maintaining conditioning effects and ecological benefits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If liquid esterquats are used in hair conditioning formulations, then ease of incorporation and solvent-free formulation are improved, but long-term stability and emulsion stabilization deteriorate
Solution Approach 1:
The patent introduces polymer thickeners as intermediary substances that mediate between liquid esterquats and the aqueous phase. These polymers form a stabilizing network that prevents phase separation and maintains emulsion stability, while allowing the liquid esterquats to remain incorporated without requiring additional solvents. The polymer acts as a bridge that reconciles the ease of use of liquid esterquats with the stability requirements of the formulation.
2Stability of the object's composition
If carbomers are added to liquid esterquat formulations to improve stability, then emulsion stabilization is improved, but phase separation due to interaction with cationic surfactants occurs
Solution Approach 1:
The patent modifies the parameters of the carbomer-polymer system by selecting specific polymer types and concentrations that change the interaction dynamics between the polymer and cationic surfactants. By adjusting polymer characteristics such as molecular weight, charge density, and hydrophilicity, the formulation achieves emulsion stabilization without triggering phase separation. This parameter optimization allows carbomers to function stabilizers rather than destabilizers.
3Stability of the object's composition
If polymer thickeners are used to stabilize emulsions, then storage stability is improved, but formulation complexity increases
Solution Approach 1:
The patent employs polymer thickeners that perform multiple functions simultaneously: they thicken the aqueous phase, stabilize the emulsion, prevent phase separation, and maintain the incorporation of liquid esterquats. This multi-functionality reduces the need for additional separate stabilizing agents, thereby limiting the increase in formulation complexity while achieving comprehensive storage stability.
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 use of polymer thickeners in liquid esterquat formulations results in increased stability, improved conditioning effects, enhanced hydrolysis stability, and reduced crystallization, offering effective hair protection and improved usability with lower concentrations, while being environmentally friendly and economical.
Implementation Method 1
formulations containing at least one liquid esterquat (component A)) and at least one polymer thickener (component B)
Implementation Method 2
these normally lead to phase separation due to the interaction with cationic surfactants
Data Source
AI summary
The invention relates to formulations containing liquid esterquats and/or imidazolinium salts and polymer thickeners, and their use.