Terminal Acidic Dispersants for Dual Solvent Compatibility
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Solution Overview
Problem
Existing dispersants with terminal acidic groups are limited in their effectiveness, as they are either suitable for polar solvents only or non-polar solvents only, and there is a need for compounds that can function effectively in both polar and non-polar organic media.
Innovation Solution
A compound of the formula [R'-O-(Y)x-T-N(G)]m-Z-(COOH)v is developed, where T is -(CH2)3- or -CH2CH(CH3)-, R' is H or C1-50 hydrocarbyl, Y is C2-4-alkyleneoxy, G is hydrogen or a hydrocarbyl residue, Z is an aromatic moiety, and m+v is 2 to 4, allowing for use in both polar and non-polar organic media as a dispersant.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dispersants with terminal acidic groups are used in polar solvents, then dispersant effectiveness is improved, but the dispersant cannot be used in non-polar solvents
Solution Approach 1:
The dispersant molecule is segmented into distinct functional regions: a polar head group (carboxylic acid) for interacting with polar substrates and a non-polar hydrocarbon chain for compatibility with non-polar solvents. This segmentation allows the molecule to bridge polar and non-polar environments, resolving the contradiction between solvent compatibility and dispersant effectiveness.
Solution Approach 2:
The dispersant employs a composite molecular structure combining polar carboxylic acid groups with non-polar hydrocarbon chains. This composite architecture enables the dispersant to function effectively in both polar and non-polar media by providing appropriate polar and non-polar interactions simultaneously.
2Adaptability or versatility
If dispersants are designed for non-polar solvents only, then dispersant effectiveness is improved in non-polar media, but the dispersant cannot be used in polar solvents
Solution Approach 1:
The dispersant molecule is segmented into distinct functional regions: a polar head group (carboxylic acid) for interacting with polar substrates and a non-polar hydrocarbon chain for compatibility with non-polar solvents. This segmentation allows the molecule to bridge polar and non-polar environments, resolving the contradiction between solvent compatibility and dispersant effectiveness.
Solution Approach 2:
The dispersant employs a composite molecular structure combining polar carboxylic acid groups with non-polar hydrocarbon chains. This composite architecture enables the dispersant to function effectively in both polar and non-polar media by providing appropriate polar and non-polar interactions simultaneously.
3Reliability
If polymeric dispersants are prepared from Jeffamine monoamine and 1,2,4-benzenetricarboxylic acid anhydride, then dispersant effectiveness is improved in polar solvents, but the dispersant is not useful in non-polar solvents
Solution Approach 1:
The dispersant structure incorporates local quality differentiation where the carboxylic acid head group provides polar character for effective interaction with polar substrates, while the hydrocarbon chain provides non-polar character for compatibility with non-polar solvents. This local quality variation within the molecule enables broad solvent compatibility while maintaining dispersant effectiveness.
4Reliability
If polymeric dispersants are prepared from polyisobutylene amine and 1,2,4-benzenetricarboxylic acid anhydride, then dispersant effectiveness is improved in non-polar solvents, but the dispersant cannot be used in polar solvents
Solution Approach 1:
The dispersant structure incorporates local quality differentiation where the carboxylic acid head group provides polar character for effective interaction with polar substrates, while the hydrocarbon chain provides non-polar character for compatibility with non-polar solvents. This local quality variation within the molecule enables broad solvent compatibility while maintaining dispersant effectiveness.
Data Source
AI summary
The invention relates to novel compounds containing a carboxylic acid head group. The invention further provides compositions containing the novel compounds, a particulate solid and an organic medium or water.