Esterquat Surfactant Mixtures for Stable Perfumed Softener Unit Doses
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fabric softener formulations using esterquats have limited compatibility with perfumes, especially in concentrated products, leading to stability and clarity issues during storage and use.
Innovation Solution
A mixture of cationic surfactants obtained through esterification of hydroxyl group-containing compounds with carboxylic group-containing compounds, followed by cation formation, which, when combined with perfume, forms clear and stable viscous liquids without the need for additional additives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If concentrated softener formulations comprising esterquats are prepared, then softening performance is improved, but compatibility with perfumes deteriorates
Solution Approach 1:
The patent changes the chemical parameters of the esterquat molecules by modifying the ester chain length (C6-C23) and the amino group substitution pattern. These parameter changes result in esterquats that maintain high softening performance while exhibiting improved compatibility with perfume ingredients in concentrated formulations, resolving the contradiction between softening efficacy and perfume compatibility.
Solution Approach 2:
The patent creates composite surfactant systems by combining specific esterquat compounds with perfume ingredients in concentrated formulations. The carefully selected esterquat structures act as compatible base materials that form stable composite systems with perfumes, eliminating the phase separation and instability issues that typically occur in concentrated softener-perfume mixtures.
2Reliability
If concentrated softener formulations are prepared, then softening performance is improved, but visual clarity and storage stability deteriorate
Solution Approach 1:
The patent optimizes molecular parameters of the esterquat compounds, specifically controlling the ester chain length (C6-C23) and amino group substitution to achieve the desired balance. These parameter changes produce molecules that self-assemble into clear, stable structures in concentrated form without requiring additional additives, thereby improving both visual clarity and storage stability while maintaining softening performance.
3Stability of the object's composition
If additional additives (thickeners, emulsifiers) are added to achieve clarity and stability, then storage stability is improved, but formulation complexity increases
Solution Approach 1:
The patent extracts and eliminates the need for additional auxiliary additives (thickeners, emulsifiers) by designing esterquat molecules with inherent stabilizing properties. The modified esterquat structures self-organize to provide the necessary viscosity, clarity, and storage stability, thereby simplifying the overall formulation while maintaining or improving performance characteristics.
Solution Approach 2:
The esterquat compounds described in the patent exhibit self-service properties where the molecules themselves provide the thickening, emulsifying, and stabilizing functions that would normally require separate additives. The specific molecular structures enable self-assembly into stable, clear formulations, making the system self-sufficient and reducing formulation complexity.
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 cationic surfactant mixtures provide clear, stable, and viscous softener compositions that can be used directly in washing machines or diluted with tap water, offering improved compatibility with perfumes and enhanced storage stability.
Implementation Method 1
The present invention generally relates to mixtures of cationic surfactants useful for preparing concentrated softening compositions
Data Source
AI summary
The present invention generally relates to mixtures of cationic surfactants useful for preparing concentrated softening compositions that can be introduced directly to the washing machine as a unit dose (e.g., tablet or capsule) or as a concentrated product; or can be used to prepare a fabric softener at home using tap water; and their use for softening fabrics and/or fibres.