Branched and Linear Alkyl Sulfate Compositions for Suds Control
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Solution Overview
Problem
Conventional laundry detergents fail to provide an optimized sudsing profile at all four touch points during the wash and rinse cycles, leading to unnecessary rinsing, resource wastage, and a suboptimal consumer experience, particularly for hand-washing consumers.
Innovation Solution
A cleaning composition comprising branched, unalkoxylated C6-C14 alkyl sulfates and linear, unalkoxylated C6-C18 alkyl sulfates at specific ratios, along with C10-C20 linear alkylbenzene sulphonates, to achieve a unique sudsing profile characterized by high initial wash suds, sustained wash suds, moderate rinse suds, and rapid suds reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If long-chain surfactants are used to maximize surface activity and soil removal, then cleaning effectiveness is improved, but suds volume increases excessively leading to unnecessary rinsing cycles
Solution Approach 1:
The patent changes the carbon chain length parameter of surfactants from conventional long chains (C12-C18) to shorter chains (C6-C10), which fundamentally alters the sudsing behavior while maintaining cleaning effectiveness. This parameter change reduces excessive suds formation during rinsing, eliminating unnecessary rinse cycles and saving time
Solution Approach 2:
The patent creates a composite surfactant system by combining multiple short-chain surfactants (C6-C10 alkyl sulfates, C6-C10 alkylbenzene sulfonates, and C6-C10 alkyl ether sulfates) in specific ratios. This composite approach achieves synergistic effects that maintain high cleaning effectiveness while controlling suds volume to prevent excessive rinsing
2Ease of operation
If high suds volume is generated during wash cycle to signal effective cleaning, then consumer perception of cleaning quality is improved, but suds residue remains on fabrics causing skin irritation and stickiness
Solution Approach 1:
The patent changes the surfactant molecular structure by using shorter carbon chains (C6-C10 instead of C12-C18), which modifies the surfactant's interaction with fabric and skin. This parameter change reduces the adhesive properties of surfactant residues, minimizing skin irritation and fabric stickiness while still generating adequate suds during washing
Solution Approach 2:
The patent applies different surfactant types with specific properties to different functional requirements: some surfactants are selected for high suds generation during wash, while others are selected for low residue formation during rinsing. This local quality differentiation optimizes both consumer perception and reduces harmful effects
3Reliability
If multiple rinsing cycles are performed to remove surfactant residue and eliminate suds, then fabric cleanliness is improved, but water and energy consumption increase significantly
Solution Approach 1:
The patent changes the surfactant hydrophobicity parameter by using shorter carbon chains (C6-C10), which improves water solubility and reduces the affinity for fabric fibers. This enables complete removal of surfactant residue in a single rinse cycle, eliminating the need for multiple rinses and reducing water and energy consumption
Solution Approach 2:
The patent employs surfactants that are designed to be easily rinseable and non-residual, effectively making them 'disposable' after a single use cycle. The short-chain surfactants dissolve completely in rinse water without leaving persistent residues on fabric, allowing single-rinse completion and reducing resource waste
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 delightful washing and rinsing experience by ensuring high initial wash suds, sustained wash suds, moderate rinse suds, and rapid suds disappearance, allowing consumers to confidently stop rinsing after a single cycle, thus saving time and resources.
Implementation Method 1
Detergents comprising anionic detersive surfactants for cleaning fabrics have been known for many years
Implementation Method 2
Such long-chain surfactants can generate copious suds during wash cycles of the fabric laundering process
Implementation Method 3
cleaning compositions containing the branched AS surfactant and the linear ABS surfactant and the short-chain nonionic AA surfactant
Data Source
Figure 1
AI summary
Cleaning compositions with improved sudsing profiles are provided, which contain the combination of one or more branched, unethoxylated C6-C14 alkyl sulphate surfactants with one or more linear, unalkoxylated C6-C18 alkyl sulfate surfactants. Such cleaning compositions are particularly suitable for hand-washing dishes or fabrics.