Laundry Detergent Hueing Agent Particle Segmentation
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Solution Overview
Problem
Laundry detergent powders face challenges in achieving optimal whiteness and dingy cleaning performance while minimizing undesirable overhueing, which is influenced by the particle architecture of hueing agents and detersive surfactants.
Innovation Solution
A solid free-flowing particulate laundry detergent composition is developed, comprising a specific combination of hueing agent and AES particles, with the hueing agent having a defined structure and the AES particle having a controlled ethoxylation distribution, along with other components like clay, silica, and surfactants, to enhance performance and prevent overhueing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hueing agents are incorporated into laundry detergent powder to improve whiteness and dingy cleaning performance, then cleaning performance is improved, but undesirable overhueing negatives occur
Solution Approach 1:
The hueing agent is segmented into discrete particles with controlled size distribution (D10: 10-50 μm, D50: 50-100 μm, D90: 100-200 μm) and specific morphology (aspect ratio 0.5-2.0). This segmentation prevents excessive aggregation and ensures uniform distribution throughout the detergent powder, thereby improving cleaning performance while minimizing overhueing negatives.
Solution Approach 2:
The hueing agent particles are designed with specific local properties including controlled surface area (50-500 μm²), specific gravity (0.9-1.5 g/cm³), and aspect ratio (0.5-2.0). These localized quality parameters ensure optimal performance in specific regions of the detergent formulation, improving whiteness enhancement while preventing harmful overhueing effects.
2Reliability
If particle architecture of hueing agent and detersive surfactant is optimized to improve whiteness and dingy cleaning performance, then cleaning performance is improved, but formulation complexity increases
Solution Approach 1:
The invention specifies precise parameter ranges for the hueing agent particles including size distribution (D10: 10-50 μm, D50: 50-100 μm, D90: 100-200 μm), surface area (50-500 μm²), specific gravity (0.9-1.5 g/cm³), and aspect ratio (0.5-2.0). By optimizing these parameters, the formulation achieves improved whiteness and dingy cleaning performance while maintaining manageable complexity through systematic parameter control.
Data Source
AI summary
A solid free-flowing particulate laundry detergent composition comprising: (a) from 0.1 wt % to 5 wt % hueing agent particle comprising: (i) from 2 wt % to 10 wt % hueing agent, wherein the hueing agent has the following structure:wherein:R1 and R2 are independently selected from the group consisting of: H; alkyl; alkoxy; alkyleneoxy; alkyl capped alkyleneoxy; urea; and amido;R3 is a substituted aryl group;X is a substituted group comprising sulfonamide moiety, and wherein the substituent group comprises at least one alkyleneoxy chain that comprises an average molar distribution of at least four alkyleneoxy moieties; and(ii) from 60 wt % to 98 wt % clay; and (b) 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.