High Shear Emulsification of Cationic Surfactants and Fatty Compounds
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Solution Overview
Problem
Existing methods for preparing hair conditioning compositions with di-long alkyl cationic surfactants fail to effectively transform surfactants and fatty compounds into emulsions without deteriorating wet conditioning benefits, and lack flexibility in manufacturing operations while requiring high investment.
Innovation Solution
A method involving the preparation of an oil phase with a high melting point fatty compound at a temperature above its melting point and an aqueous phase below the melting point, followed by direct feeding into a high shear field using a homogenizer with a rotating member, to form an emulsion with improved energy density and temperature control, resulting in a cationic surfactant system and high melting point fatty compound emulsion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing methods are used to prepare hair conditioning compositions with di-long alkyl cationic surfactants, then the surfactants and fatty compounds can be transformed into emulsions, but the wet conditioning benefits are deteriorated
Solution Approach 1:
The patent applies parameter changes by precisely controlling the temperature of the oil phase (maintaining it above the melting point of high melting point fatty compounds) and the aqueous phase (maintaining it below the melting point) before emulsification. This temperature differential parameter control enables effective emulsion transformation while preserving wet conditioning benefits, resolving the contradiction between transformation effectiveness and benefit preservation.
2Manufacturing precision
If high pressure homogenization is used to prepare personal care compositions, then emulsion formation is achieved, but manufacturing complexity and investment costs increase
Solution Approach 1:
The patent replaces high pressure homogenization with a homogenizer having a rotating member, changing the physical parameter from pressure-driven to shear-driven emulsification. The oil phase is introduced into the high shear field at controlled temperatures, achieving effective emulsion formation without requiring complex high pressure equipment, thus reducing manufacturing complexity and investment costs while maintaining emulsion quality.
3Manufacturing precision
If high pressure equipment is used for emulsion preparation, then emulsion quality is improved, but investment costs increase
Solution Approach 1:
The patent substitutes expensive, complex high pressure homogenization equipment with a simpler homogenizer having a rotating member. This equipment replacement principle reduces investment costs significantly while maintaining adequate emulsion quality through controlled temperature parameters and shear field application, making the manufacturing process more accessible and cost-effective.
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
This method enhances the transformation of surfactants and fatty compounds into emulsions, providing improved conditioning benefits, product appearance, and stability, while reducing manufacturing complexity and investment costs.
Implementation Method 1
mixing the oil phase and the aqueous phase in a high shear field to form an emulsion, wherein the mixing step is conducted by using a homogenizer having a rotating member
Implementation Method 2
wherein the temperature of the oil phase is higher than a melting point of the high melting point fatty compound; and (2) preparing an aqueous phase comprising the aqueous carrier, wherein the temperature of the aqueous phase is below the melting point of the high melting point fatty compounds
Data Source
AI summary
Disclosed is a method of preparing a personal care composition, comprising a step of mixing a hot oil phase and a cold aqueous phase in a high shear field to form an emulsion, wherein the mixing step is conducted by using a homogenizer having a rotating member, wherein the oil phase contains from 0 to about 50% of the aqueous carrier by weight of the oil phase, and wherein the temperature of the emulsion when formed is from about 10° C. to about 40° C.