Particulate Laundry Detergent with Segmented Surfactant Architecture
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Solution Overview
Problem
Laundry detergent powders face challenges in achieving optimal cleaning and perfume deposition on wet fabrics due to the limitations in the particle architecture of detersive surfactants, which affect the overall performance of the detergent.
Innovation Solution
A solid free-flowing particulate laundry detergent composition is developed, incorporating a specific range of partially ethoxylated alkyl sulphate anionic detersive surfactant with a controlled ethoxylation distribution, combined with silica and a high C log P perfume, to enhance both cleaning and perfume deposition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional detersive surfactant particles are used, then the detergent can be manufactured simply, but the perfume deposition on wet fabric is insufficient
Solution Approach 1:
The surfactant is segmented into distinct ethoxylation populations (unethoxylated, monoethoxylated, diethoxylated) with specific weight percentages, creating a multi-component particle architecture that enhances both cleaning and perfume deposition performance
Solution Approach 2:
The detergent composition uses a composite particle structure combining partially ethoxylated alkyl sulphate anionic detersive surfactant with specific ethoxylation distribution, salt, and silica to achieve improved cleaning and perfume performance
2Stability of the object's composition
If highly ethoxylated surfactant is used, then solubility improves, but cleaning performance and perfume deposition deteriorate
Solution Approach 1:
The surfactant's ethoxylation degree is precisely controlled within a narrow range (0.8 to 1.2 average degree), creating a balance between solubility and cleaning performance that neither highly ethoxylated nor unethoxylated surfactants achieve alone
3Reliability
If more perfume materials with high C log P are used, then wet fabric perfume performance improves, but the risk of perfume loss increases
Solution Approach 1:
The perfume composition is optimized to contain at least 60 wt% materials with C log P of 3.0 or greater, selecting specific hydrophobicity parameters that maximize wet fabric performance while minimizing loss
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 exhibits improved cleaning performance and excellent wet fabric perfume deposition, providing a balanced and effective laundry experience.
Implementation Method 1
partially ethoxylated alkyl sulphate anionic detersive surfactant
Implementation Method 2
deposition of perfume on wet fabric
Data Source
AI summary
A solid free-flowing particulate laundry detergent composition including: (a) from 0.5 wt % to 20 wt % ethoxylated alkyl sulphate particle including: (i) from 40 wt % to 60 wt % partially ethoxylated alkyl sulphate anionic detersive surfactant; (ii) from 20 wt % to 50 wt % salt; and (iii) from 10 wt % to 30 wt % silica; and (b) from 0.01 wt % to 2 wt % perfume.