Fabric Care Composition for Color Renewal Without Dyeing
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Solution Overview
Problem
Cationic polymers, when used at higher concentrations, are challenging to formulate with anionic surfactants due to their positive charge, leading to phase-separated mixtures that are incompatible with consumer use, limiting their application in fabric care compositions for color restoration and maintenance.
Innovation Solution
Compositions combining cationic polymers with anionic surfactants form coacervates that interact with fabrics, depositing a thin film to reduce light diffraction and enhance color appearance, while incorporating silicone materials improves benefits such as color care and fuzz reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If higher concentrations of cationic polymers are used to provide color care benefits to fabrics, then color restoration and maintenance effectiveness is improved, but formulation stability deteriorates due to phase separation with anionic surfactants
Solution Approach 1:
The patent introduces a nonionic surfactant as an intermediary substance that mediates between the cationic polymer and anionic surfactant. The nonionic surfactant has affinity for both charged components, acting as a bridge that prevents direct interaction between the cationic polymer and anionic surfactant, thereby maintaining formulation stability while allowing higher concentrations of cationic polymer to be used for effective color care
2Reliability
If cationic polymers are combined with anionic surfactants in fabric care compositions, then color restoration benefit is achieved, but mixture homogeneity deteriorates due to charge interaction and phase separation
Solution Approach 1:
The nonionic surfactant serves as a mediator that prevents direct electrostatic interaction between cationic polymers and anionic surfactants. By inserting this neutral intermediary component, the composition maintains homogeneous mixing while still delivering the color restoration benefits of the cationic polymer to the fabric
3Illumination intensity
If dyes are used to restore color to faded fabrics, then color appearance is improved, but process complexity increases due to multiple steps and color matching requirements
Solution Approach 1:
The patent extracts the color restoration function from the complex dyeing process and transfers it to a simpler fabric care composition application. Instead of using actual dyes that require color matching and multiple processing steps, the invention uses cationic polymers that deposit on fabric to restore color appearance through a single, simple laundering cycle
Solution Approach 2:
The invention creates a simplified copy of the color restoration effect. Rather than applying actual dye molecules that bind chemically to fabric, the cationic polymer composition creates a analogous color enhancement effect through physical deposition, replicating the visual benefit of dyeing without the chemical 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 combination of cationic polymers and anionic surfactants in fabric care compositions effectively restores and maintains color, reducing diffraction and enhancing the appearance of colored fabrics, providing a deeper, more vibrant hue without the need for dyes and complex re-dyeing processes.
Implementation Method 1
Compositions combining cationic polymers with anionic surfactants form coacervates that interact with fabrics
Implementation Method 2
depositing a thin film to reduce light diffraction and enhance color appearance
Implementation Method 3
incorporating silicone materials improves benefits such as color care and fuzz reduction
Data Source
AI summary
Compositions and methods useful for providing one or more benefits, including a color rejuvenation and/or color maintenance benefit to a fabric are disclosed. The disclosed compositions contain at least one cationic polymer. The methods include providing the disclosed compositions in combination with a source of anionic surfactant. Unit dose and multi-compartment systems are also disclosed.