Segmented Hueing Agent Particles in Laundry Detergent
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Solution Overview
Problem
Laundry detergent powders face challenges in achieving even distribution of hueing agents on fabric surfaces while minimizing undesirable spotting, which affects their whiteness and dingy cleaning performance.
Innovation Solution
A solid free-flowing particulate laundry detergent composition is developed, comprising a specific combination of hueing agent particles and spray-dried particles, including alkyl benzene sulphonate anionic detersive surfactant, silicate salt, sodium carbonate, and carboxylate polymer, optimized in terms of weight percentages and particle architecture to enhance distribution and reduce spotting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hueing agents are incorporated into laundry detergent powder to improve whiteness and cleaning performance, then cleaning effectiveness is improved, but uneven distribution on fabric surface and spotting negatives occur
Solution Approach 1:
The hueing agent is segmented into separate particles distinct from the surfactant particles. This segmentation allows the hueing agent to be distributed independently and evenly across the fabric surface without clumping with surfactants, thereby achieving uniform distribution while maintaining effective cleaning performance.
Solution Approach 2:
The invention applies local quality by creating separate particle types with specific functions: hueing agent particles for whiteness enhancement and surfactant particles for cleaning. This functional separation ensures that each component performs its specific role effectively, with the hueing agent providing localized whiteness improvement without interfering with overall cleaning uniformity.
2Illumination intensity
If hueing agents are incorporated into laundry detergent powder to enhance whiteness performance, then fabric whiteness is improved, but undesirable spotting negatives occur
Solution Approach 1:
By segmenting the hueing agent into separate particles rather than incorporating it into surfactant particles, the invention prevents localized concentration of hueing agent that would cause spotting. The separate particle structure ensures even dispersion throughout the detergent formulation, improving whiteness while eliminating spotting negatives.
Solution Approach 2:
The separate particle structure acts as an intermediary mechanism that prevents direct interaction between hueing agent and surfactant that would cause spotting. This physical separation serves as a mediator that allows both components to function independently and effectively, with the hueing agent enhancing whiteness without creating harmful spotting effects.
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 improved whiteness and dingy cleaning performance with more even hueing agent distribution and minimized spotting, leading to better fabric cleaning results.
Implementation Method 1
from 8 wt % to 24 wt % alkyl benzene sulphonate anionic detersive surfactant
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 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(ii) from 60 wt % to 98 wt % clay; and (b) from 35 wt % to 80 wt % spray-dried particle comprising: (a) from 8 wt % to 24 wt % alkyl benzene sulphonate anionic detersive surfactant; (b) from 5w % to 18 wt % silicate salt; (c) from 0 wt % to 10 wt % sodium carbonate; and (d) from 0 wt % to 5 wt % carboxylate polymer.