Granular Detergent Composition for Fast Suds and Controlled Foam Decay
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Solution Overview
Problem
Existing granular laundry detergents struggle to quickly generate suds at the start of the wash operation while maintaining their presence throughout, failing to balance initial suds generation with subsequent reduction.
Innovation Solution
A granular laundry detergent composition comprising a first granule with a specific ratio of linear alkylbenzene sulphonate to alkyl sulphate and optionally an inorganic salt, formulated through a process involving the creation of a slurry and conversion into granules, which enhances initial suds generation and subsequent reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If conventional granular laundry detergent compositions are used, then suds longevity is improved, but initial suds generation speed deteriorates
Solution Approach 1:
The detergent composition is segmented into two distinct granule types: first granules containing anionic surfactants for rapid initial suds generation, and second granules containing non-ionic surfactants for sustained suds longevity. This segmentation allows each granule type to specialize in one function, resolving the contradiction between fast initial generation and prolonged duration.
Solution Approach 2:
Different regions of the detergent composition have different qualities: the first granules are specifically formulated with anionic surfactants (2-40% by weight) to provide high suds generation speed at the start, while the second granules contain non-ionic surfactants (1-30% by weight) to maintain suds throughout the wash. This local differentiation of surfactant properties resolves the speed-longevity trade-off.
2Speed
If anionic surfactant concentration is increased to improve initial suds generation, then suds generation speed is improved, but suds reduction control deteriorates
Solution Approach 1:
The invention merges two previously separate surfactant systems into a single coordinated composition: anionic surfactants in first granules provide rapid suds generation, while non-ionic surfactants in second granules provide controlled suds reduction. The synergistic interaction between these two surfactant types, with specific weight ratios, achieves both fast generation and controlled reduction simultaneously.
Solution Approach 2:
The detergent uses a composite surfactant system combining anionic and non-ionic surfactants in specific proportions. The anionic surfactants (linear alkylbenzene sulphonate and/or linear alkyl sulphate) provide rapid foaming, while the non-ionic surfactants (alkyl polyglucoside and/or alkyl ether carboxylate) modulate the foam stability, creating a composite material with balanced performance characteristics.
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 achieves rapid suds formation at the start of the wash and controlled suds reduction over time, improving the wash performance by maintaining optimal suds levels throughout the process.
Implementation Method 1
wherein the anionic surfactant comprises linear alkylbenzene sulphonate and linear alkyl sulphate
Data Source
AI summary
A granular laundry detergent composition containing a first granule, a method making the granular laundry detergent composition and a method of using the granular laundry detergent composition.