Ethoxylated Glycerol Ester Detergent for Low-Foam Dish Drying
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Solution Overview
Problem
Existing detergent compositions for machine dishwashing fail to effectively prevent stain and film formation on dishes, and improve rinse aiding and drying performance, despite advancements in rinse aid formulations and polymers.
Innovation Solution
Incorporation of ethoxylated glycerol esters, prepared in the presence of a calcium catalyst, into detergent compositions for machine dishwashing, which are characterized by specific alkyl chain lengths and ethylene oxide ratios, and a controlled molar ratio of calcium hydroxide to carboxylic acid in catalyst preparation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional rinse aid formulations are used, then basic cleaning is achieved, but stain and film formation on dishes cannot be effectively prevented
Solution Approach 1:
The patent changes the chemical parameters of the rinse aid by using ethoxylated glycerol esters with specific ethylene oxide ratios (1-200 EO groups per glycerol molecule) and controlled hydroxyl values (0-10 mg KOH/g), which fundamentally alters the surface tension and film-forming properties to prevent stains and films on dishes
Solution Approach 2:
The patent creates a composite rinse aid system combining ethoxylated glycerol esters with specific detergent formulations, where the glycerol ester components work synergistically with other detergent ingredients to provide enhanced stain and film prevention while maintaining compatibility with the overall detergent system
2Object-affected harmful factors
If polymers are added to detergent compositions to improve rinse aid performance, then stain and film reduction is achieved, but foaming increases
Solution Approach 1:
The patent changes the molecular structure parameters of the polymer by using ethoxylated glycerol esters with specific ethylene oxide ratios and controlled molecular weights, which modifies the polymer's interaction with water and air to reduce foaming while maintaining stain and film prevention capabilities
Solution Approach 2:
The patent employs glycerol-based polymers that are biodegradable and environmentally friendly, replacing traditional petroleum-based polymers that cause excessive foaming, thereby achieving stain and film reduction without the harmful side effects of conventional polymer foaming
3Adaptability or versatility
If phosphate-free detergent compositions are used, then environmental compatibility is improved, but rinse aiding and drying performance deteriorate
Solution Approach 1:
The patent changes the chemical composition parameters by replacing phosphate builders with ethoxylated glycerol esters that have specific hydroxyl values and ethylene oxide ratios, which provide equivalent or superior rinse aiding and drying performance without phosphates, thereby maintaining environmental compatibility
Solution Approach 2:
The patent introduces ethoxylated glycerol esters as intermediary substances that mediate between the phosphate-free requirement and the need for effective rinse aiding and drying performance, filling the functional gap left by phosphate removal while maintaining environmental benefits
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 ethoxylated glycerol esters enhance rinse aiding properties, reduce stain and film formation, and improve drying capacity without increasing foaming, even in phosphate-free compositions.
Implementation Method 1
The object of rinse aids is to affect the interface and surface tension of water in such a way that it can run off the rinsed surfaces as a thin film
Implementation Method 2
one or more ethoxylated glycerol esters of formula (I), prepared from ethylene oxide and one or more triglycerides of formula (II) in the presence of a calcium catalyst (C)
Data Source
AI summary
A detergent composition for machine dishwashing comprising Z1) one or more ethoxylated glycerol esters of formula (I),prepared from ethylene oxide and one or more triglycerides of formula (II) in the presence of a calcium catalyst (C), characterized in that R1, R2 and R3 in formulae (I) and (II) are equal or different and are independently selected from saturated or unsaturated, linear or branched C7-C24 alkyl chains; m, n and o in formula (I) are equal or different and are each independently an integer number from 1 to 200 with the proviso that the number-average of the sum of m+n+o is greater than 5; and the calcium catalyst (C) is a catalyst obtainable by a reaction involving (A) calcium hydroxide and (B) a carboxylic acid comprising 3 to 40 carbon atoms, wherein the molar ratio of calcium hydroxide (A) to carboxylic acid (B) in the preparation of the catalyst (C) is from 1:1 to 1:5.