Spray Dried Dye Granule Strength in Laundry Detergent
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Solution Overview
Problem
Spray dried dye granules in laundry detergent compositions lack robustness, leading to fragmentation upon mixing with sodium sulfate or sodium chloride, resulting in discoloration and reduced dye strength.
Innovation Solution
A granular laundry detergent composition comprising 0.00005 to 0.2 wt% of a spray dried dye granule with 20 to 90 wt% blue or violet dye, 1 to 20 wt% carboxylic acid containing polymer (such as sodium carboxymethyl cellulose), 0 to 60 wt% alkali metal salt, 2 to 70 wt% surfactant, 5 to 50 wt% builder, and 0.05 to 50 wt% water-soluble carrier, which enhances the granule's strength and reduces dye dust during handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If spray dried dye granules are used in laundry detergent compositions, then the dye can be delivered to the wash, but the granules lack robustness and fragment upon mixing with sodium sulfate or sodium chloride
Solution Approach 1:
The patent creates a composite granule structure by combining spray-dried dye granules with a water-soluble carrier salt (such as sodium sulfate or sodium chloride) and a carboxylic acid containing polymer. This composite approach provides the dye granules with a supportive matrix that prevents fragmentation while maintaining dye delivery functionality. The carrier salt forms a structural framework that reinforces the fragile dye granules during handling and mixing operations.
Solution Approach 2:
The carboxylic acid containing polymer acts as an intermediary substance that mediates between the fragile dye granules and the harsh mixing conditions. The polymer forms a protective network that cushions the dye granules during mixing with sodium sulfate or sodium chloride, preventing direct mechanical stress and fragmentation while allowing the dye to remain functional.
2Reliability
If spray dried dye granules are used in laundry detergent compositions, then the dye can be delivered to the wash, but fragmentation leads to discoloration of the powder
Solution Approach 1:
The composite structure combines dye granules with a water-soluble carrier salt and carboxylic acid polymer to create a reinforced system. This composite material maintains dye integrity during handling and mixing, preventing fragmentation that would otherwise cause discoloration of the powder while ensuring reliable dye delivery to the wash.
Solution Approach 2:
The water-soluble carrier salt and carboxylic acid polymer are incorporated into the granule structure beforehand to provide cushioning and protection. This pre-established protective matrix prevents mechanical stress and fragmentation during subsequent mixing operations, thereby preventing discoloration while maintaining dye delivery functionality.
3Reliability
If spray dried dye granules are used in laundry detergent compositions, then the dye can be delivered to the wash, but the granules produce dye dust during handling
Solution Approach 1:
The patent creates a composite granule system where spray-dried dye granules are embedded in a matrix of water-soluble carrier salt and carboxylic acid polymer. This composite structure provides mechanical reinforcement that prevents granule fragmentation and dye dust generation during handling, while maintaining reliable dye delivery to the wash through controlled dissolution.
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 robustness to the granules, preventing fragmentation and discoloration, thereby maintaining dye strength and reducing dust during handling and storage.
Implementation Method 1
combining with a carboxylic acid containing polymer and sodium sulphate
Implementation Method 2
spray dried dye granule
Implementation Method 3
made by fluid bed processes or spray drying
Implementation Method 4
combining with a carboxylic acid containing polymer and sodium sulphate
Data Source
AI summary
The present invention concerns laundry shading dye compositions and in particular the strength of dye containing granules.