Liquid Laundry Formulation with Modified Lignin Polymer
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Solution Overview
Problem
Liquid detergents containing shading dyes often cause blue or violet stains when applied directly to fabric, and they fail to provide effective shading benefits while minimizing staining.
Innovation Solution
A liquid laundry formulation combining a shading dye, surfactant, and a modified lignin polymer that reduces staining on fabric contact while maintaining acceptable dye deposition for shading benefits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If shading dyes are added to liquid detergent formulations, then shading benefits are provided, but blue or violet stains occur when applied directly to fabric
Solution Approach 1:
The patent uses a non-tinting dye as an intermediary substance that provides the desired shading benefit without causing stains. This non-tinting dye acts as a mediator between the harmful staining effect of conventional shading dyes and the desired shading function, achieving the shading effect through a different mechanism that does not result in fabric staining.
Solution Approach 2:
The patent changes the chemical parameters of the dye by using a non-tinting dye with different molecular structure and staining properties. This parameter change allows the dye to provide shading benefits through optical effects rather than through substantive binding to fabric, thereby eliminating the staining problem while maintaining the shading function.
2Reliability
If conventional shading dyes are used in liquid detergents, then shading benefits are provided, but the product causes staining on neat contact with fabric
Solution Approach 1:
The non-tinting dye serves as an intermediary that decouples the shading function from the staining effect. This mediator provides the desired visual shading benefit without the harmful substantive binding to fabric that causes staining during neat contact application.
Solution Approach 2:
The patent converts the potentially harmful staining property of conventional dyes into a beneficial non-staining shading effect by using a non-tinting dye. The harmful substantive binding property is transformed into a beneficial optical shading effect that does not permanently deposit on fabric.
3Object-affected harmful factors
If non-tinting dyes are used for product aesthetics, then staining is reduced, but no shading benefit is provided
Solution Approach 1:
The non-tinting dye performs multiple functions: it provides product aesthetics, reduces staining, and delivers shading benefits. This multi-functional approach eliminates the trade-off between staining reduction and shading benefit by achieving both objectives simultaneously through the unique properties of non-tinting dyes.
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 formulation significantly reduces staining on fabric when applied directly, achieving 16% to 69% less staining compared to reference formulations, while providing effective shading benefits under domestic conditions.
Implementation Method 1
a liquid formulation containing a shading dye, surfactant, and a modified lignin polymer has reduced staining properties on neat contact with a textile
Data Source
AI summary
The present invention concerns liquid laundry formulations incorporating a modified lignin polymer.