Liquid Laundry Detergent with Cationic Polysaccharide and Cellulose
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Solution Overview
Problem
Liquid laundry detergent compositions containing linear alkylbenzene sulphonate anionic surfactants struggle to provide both effective cleaning and fabric softening benefits without compromising fabric whiteness.
Innovation Solution
A liquid laundry detergent composition comprising amine-neutralized C12-14 linear alkylbenzene sulphonate, a cationically modified polysaccharide, and a cellulosic polymer, which are combined in specific weight percentages to provide both fabric softening and improved whiteness benefits, and can be formulated into a water-soluble unit dose article for convenient use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If cationically modified polysaccharides are added to provide fabric softening benefits, then fabric softness is improved, but fabric whiteness is compromised
Solution Approach 1:
The patent combines cationically modified polysaccharides (for softening) with cellulosic polymers (for whiteness maintenance) and amine-neutralized linear alkylbenzene sulphonate (for cleaning) into a composite detergent formulation. This composite approach allows the synergistic interaction of multiple materials to achieve both softening and whiteness benefits simultaneously, resolving the contradiction between fabric softness and whiteness maintenance
Solution Approach 2:
The patent specifies precise concentration ranges for each component: cationically modified polysaccharides at 0.05-3%, cellulosic polymers at 0.05-3%, and amine-neutralized linear alkylbenzene sulphonate at 5-35%. By optimizing these parameter ranges, the formulation achieves the desired balance between fabric softening and whiteness maintenance, transforming the trade-off into a controlled composition space where both benefits coexist
2Productivity
If linear alkylbenzene sulphonate is used for effective fabric cleaning, then cleaning performance is improved, but fabric softening benefit is reduced
Solution Approach 1:
The patent merges the cleaning function of linear alkylbenzene sulphonate with the softening function of cationically modified polysaccharides and the whiteness maintenance function of cellulosic polymers into a single integrated detergent composition. This combination allows all three functions (cleaning, softening, and whiteness maintenance) to be achieved simultaneously in one product application
Solution Approach 2:
The detergent composition is designed to perform multiple functions: linear alkylbenzene sulphonate provides cleaning, cationically modified polysaccharides provide softening, and cellulosic polymers provide whiteness maintenance. This multi-functional formulation eliminates the need for separate cleaning and softening treatments, achieving universal benefit in a single wash cycle
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 effectively enhances fabric softness while maintaining whiteness, as demonstrated by tests showing improved fabric feel and no compromise in whiteness maintenance, even after multiple wash cycles.
Implementation Method 1
cationically modified polysaccharides may be added to the liquid laundry detergent composition
Implementation Method 2
liquid laundry detergent compositions comprising linear alkylbenzene sulphonate anionic surfactant are known and used for cleaning fabrics
Data Source
AI summary
The present invention discloses liquid laundry detergent compositions comprising a first and second polymer