Cationic Modified Polysaccharide Deposition Aid for Fabric Brightness
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Solution Overview
Problem
Cationic polymers used in fabric and home care compositions can cause redeposition of soil and dye onto fabrics, leading to dinginess and loss of whiteness, necessitating the development of deposition aid polymers that do not compromise fabric brightness.
Innovation Solution
A fabric and home care composition combining an anionic detersive surfactant, protease enzyme, and a cationic modified polysaccharide with α-1,4 and α-1,6 linkages, where the α-1,6 linkage is more than 7.0% of the total glycosidic linkage, to effectively deposit actives onto fabrics while maintaining whiteness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If cationic polymers are used as deposition aid for actives, then deposition efficiency is improved, but fabric whiteness and brightness are lost due to redeposition of soil and dye
Solution Approach 1:
The patent changes the chemical structure parameters of the polysaccharide by controlling the ratio of α-1,6 to α-1,4 glycosidic linkages (more than 7.0% α-1,6 linkages). This structural modification alters the polymer's interaction properties with fabric and soil, enabling effective deposition of actives while preventing redeposition that causes dinginess, thus resolving the contradiction between deposition efficiency and fabric whiteness maintenance
Solution Approach 2:
The invention creates a composite functional system by combining the specifically structured cationic modified polysaccharide with anionic detersive surfactant and protease enzyme. This composite approach synergistically achieves both deposition aid function and soil/dye redeposition prevention, maintaining fabric brightness while improving active deposition efficiency
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 composition provides a strong whiteness benefit while preventing redeposition of soil and dye, thus maintaining fabric brightness and cleanliness.
Implementation Method 1
cationic polymers are widely used in fabric and home care composition as deposition aid for actives
Implementation Method 2
cationic modified polysaccharide...deposit actives onto a surface, such as a fabric surface
Implementation Method 3
anionic detersive surfactant system
Implementation Method 4
protease enzyme
Data Source
AI summary
A fabric and home care composition comprising anionic detersive surfactant, protease enzyme and cationic modified polysaccharide.