Branched Alkoxylated Fatty Alcohol Stabilizes Liquid Detergent
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Solution Overview
Problem
Liquid detergents and cleaning agents with graying-inhibiting polysaccharides like carboxymethyl cellulose often suffer from low solubility, leading to clouding and aesthetic issues in transparent formulations, and achieving stable dispersions in these matrices is challenging.
Innovation Solution
Incorporating a combination of branched alkoxylated fatty alcohols, such as 2-propylheptanol with 7 EO or 8 EO, with a graying-inhibiting polymer, preferably a polysaccharide like cellulose or its derivatives, to create stable and aesthetically pleasing detergents or cleaning agents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If carboxymethyl cellulose is incorporated into liquid detergents, then graying inhibition is achieved, but clouding occurs and aesthetic appearance deteriorates
Solution Approach 1:
The patent uses a nonionic surfactant as an intermediary substance to mediate between the graying-inhibiting polymer and the aqueous detergent matrix. This surfactant intermediary improves the solubility and compatibility of the polymer, allowing it to remain dissolved without causing clouding, thus maintaining both graying inhibition functionality and aesthetic transparency
Solution Approach 2:
The patent modifies the chemical parameters of the system by selecting specific types of graying-inhibiting polymers (such as modified starches or cellulose derivatives with controlled molecular weight and substitution patterns) and adjusting their concentration ranges. These parameter changes enable the polymer to achieve effective graying inhibition while maintaining solubility and avoiding clouding in the liquid detergent formulation
2Reliability
If graying-inhibiting polysaccharides are added to liquid detergents, then graying inhibition is improved, but stability of the detergent matrix deteriorates
Solution Approach 1:
The nonionic surfactant acts as a stabilizing intermediary that prevents aggregation and precipitation of the graying-inhibiting polymer. By forming soluble complexes or micellar structures with the polymer, the surfactant maintains homogeneous distribution and prevents phase separation, thereby ensuring long-term stability of the detergent composition while preserving graying inhibition
Solution Approach 2:
The patent creates a composite system combining graying-inhibiting polymers with nonionic surfactants in specific ratios. This composite approach leverages the synergistic interaction between the polymer and surfactant, where the surfactant provides steric stabilization and solubility enhancement, allowing the polymer to function effectively without compromising the overall stability of the liquid detergent matrix
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 combination results in high cleaning performance and effective graying inhibition, maintaining stability and transparency over time, with the branched alkoxylated fatty alcohols enhancing the incorporation and stability of graying-inhibiting polysaccharides.
Implementation Method 1
Due to the low solubility of carboxymethyl cellulose in liquid detergents or cleaning agents, clouding occurs when carboxymethyl cellulose is incorporated into liquid detergents or cleaning agents
Implementation Method 2
Other washing aids are substances that prevent previously loosened dirt from being drawn back into a finer distribution (redeposition). Such substances are referred to as graying inhibitors
Data Source
AI summary
The application relates to a stable, liquid detergent or cleaning agent comprising, a) a branched, alkoxylated fatty alcohol with between 5 and 12 alkoxy units, and b) an anti-redeposition polymer.