Fabric Care Coacervate Systems for Color Maintenance
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Solution Overview
Problem
Existing fabric care compositions struggle to provide effective color maintenance and rejuvenation benefits without using dyes, as cationic polymers often agglomerate with anionic surfactants, leading to unstable mixtures incompatible with consumer use.
Innovation Solution
The development of compositions that form a coacervate system with cationic polymers and anionic surfactants, which deposit a thin film on fabrics, reducing light diffraction and enhancing color appearance, using specific molecular weight ranges and charge densities to mitigate flocculation and control particle size for stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cationic polymers are used at higher levels to provide color maintenance and rejuvenation benefits, then color care benefit is improved, but formulation stability deteriorates due to agglomeration with anionic surfactants
Solution Approach 1:
The patent applies parameter changes by carefully controlling the charge density of the cationic polymer (specifically polyethyleneimine derivatives) and the molecular weight of both the polymer and surfactant. By optimizing these parameters - using polymers with charge densities in specific ranges and molecular weights between 1,000-10,000,000 Daltons - the formulation achieves stable mixing of cationic polymers with anionic surfactants at higher polymer levels while maintaining color care benefits
Solution Approach 2:
The patent creates a composite material system by formulating a combination of cationic polymer (polyethyleneimine derivative), anionic surfactant, and optional co-surfactants in specific ratios. This composite approach allows the positive charges of the polymer to interact beneficially with the negative charges of the surfactant, preventing agglomeration while maintaining formulation stability and color rejuvenation properties
2Reliability
If dyes are used to restore color to faded fabrics, then color rejuvenation is improved, but ease of operation deteriorates due to complex steps and color matching requirements
Solution Approach 1:
The patent extracts the color rejuvenation function from traditional dyeing processes. Instead of using dyes that require complex application procedures and color matching, the invention uses cationic polymers that naturally bind to fabric fibers and restore color appearance through a simplified process, eliminating the need for color matching expertise
Solution Approach 2:
The patent creates a simplified copy of the dyeing effect by using cationic polymers that deposit on fabric surfaces and restore color appearance without being actual dyes. This copying approach achieves similar visual results to traditional dyeing but with much simpler application and no color matching requirements
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 achieve stable, consumer-friendly formulations that provide color maintenance and rejuvenation benefits by forming a coacervate system on fabrics, resulting in a deeper, more vibrant color appearance without the need for dyes.
Implementation Method 1
The development of compositions that form a coacervate system with cationic polymers and anionic surfactants, which deposit a thin film on fabrics, reducing light diffraction and enhancing color appearance
Implementation Method 2
deposit a thin film on fabrics, reducing light diffraction and enhancing color appearance
Data Source
AI summary
The instant disclosure relates to stable color maintenance and/or rejuvenation compositions comprising at least one cationic polymer and anionic surfactant, and methods for providing the same.