Phosphate Ester Dispersant for Universal Media Compatibility
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Solution Overview
Problem
Existing dispersant compositions are not effective in both aqueous and organic media and have high ecotoxicity, limiting their use with various particulate materials, particularly pigments and nanoparticles, and lack biodegradability.
Innovation Solution
A blend of mono- and di-esters of alkylalkoxylates and phosphoric acid, specifically polyoxyalkylenated mono- and di-phosphate esters with ethoxyl and propoxyl monomers, which are terminated by linear or branched alkyl or alkenyl radicals, providing a stable dispersion in both aqueous and organic media with reduced ecotoxicity and enhanced biodegradability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional surfactant compositions are used, then dispersing capability is achieved, but ecotoxicity increases and biodegradability decreases
Solution Approach 1:
The invention changes the chemical composition parameters by using phosphoric acid esters of polyoxyalkylenated compounds with specific structures (containing ethoxyl and propoxyl groups) instead of conventional surfactants. This parameter change maintains dispersing capability while reducing ecotoxicity and improving biodegradability
Solution Approach 2:
The dispersant composition uses a composite molecular structure combining phosphoric acid ester groups with polyoxyalkylene chains (ethylene oxide and propylene oxide units). This composite structure provides both the dispersing capability through the polyoxyalkylene portion and the reduced ecotoxicity through the phosphoric acid ester backbone
2Adaptability or versatility
If conventional dispersants are used, then dispersing in one type of media is achieved, but effectiveness in both aqueous and organic media cannot be maintained
Solution Approach 1:
The phosphoric acid ester of polyoxyalkylenated compound is designed to perform multiple functions: it effectively disperses particulate materials in both aqueous and organic media, providing universal applicability across different media types while maintaining consistent dispersing effectiveness
Solution Approach 2:
The molecular structure contains specific local regions with different properties: the phosphoric acid ester portion interacts with particulate materials while the polyoxyalkylene chains (with specific ethoxyl/propoxyl ratios) provide compatibility with different media types, achieving local optimization for multi-media effectiveness
3Reliability
If high-performance dispersants are used, then dispersing capability is improved, but environmental sustainability deteriorates
Solution Approach 1:
The invention converts the potential harm of conventional surfactants (high ecotoxicity and poor biodegradability) into benefits by using phosphoric acid esters that are inherently more biodegradable and less toxic, while maintaining or improving dispersing capability through optimized polyoxyalkylene structure
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 dispersant compositions effectively disperse a wide range of particulate materials in various media, achieving stable dispersions with improved environmental sustainability, suitable for commercial and industrial applications.
Implementation Method 1
dispersant compositions that comprise blends of polyoxyalkylenated mono- and di-phosphate esters
Data Source
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AI summary
A dispersant is provided comprising a blend of mono- and di-phosphate esters, each phosphate group being substituted with either one or two alkyl or alkenyl alkoxylate groups wherein the alkyl or alkenyl portion is a branched alkyl or alkenyl radical comprising 1-30 carbon atoms, the alkoxylate portion comprises ethoxylate monomers and/or propoxylate monomers, and the dispersant further comprises a basic component selected from an amidopropyldimethylamine, a heterocyclic amine, an ammonium ion, and an alkali metal ion. The dispersant is suitable for dispersing a variety of pigments and other particulate matter in either aqueous or organic media.