Aromatic Imide Dispersant for Pigment Stability
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Solution Overview
Problem
Existing pigment dispersion technologies face challenges in achieving uniform distribution of particulate solids in organic or aqueous media, leading to issues like agglomeration, settling, reduced gloss, and aesthetic appeal in ink and paint formulations.
Innovation Solution
A polymer with terminal and/or pendant imide groups is developed, which acts as a dispersant in compositions, improving pigment dispersion stability, reducing particle size, and enhancing jetness and gloss through specific reaction processes involving aromatic anhydrides, amines, and polyepoxides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conventional dispersants are used to distribute particulate solids in organic or aqueous media, then some level of dispersion is achieved, but uniform distribution is difficult to achieve leading to agglomeration and settling
Solution Approach 1:
The patent modifies the chemical structure of dispersants by incorporating aromatic imide groups with specific substituents (halogen, nitro, cyano, carbonyl, or carboxyl groups) to change the chemical parameters of the dispersant system. These parameter changes enhance the dispersant's ability to maintain uniform distribution and prevent agglomeration of particulate solids in both organic and aqueous media.
Solution Approach 2:
The invention uses composite dispersant molecules that combine aromatic imide core structures with various functional groups and side chains. This composite structure allows the dispersant to interact with multiple types of particulate solids and work effectively in different media types (organic and aqueous), providing reliable uniform distribution across diverse applications.
2Quantity of substance
If higher particulate solid load is incorporated in ink or paint formulations, then color strength and coverage improve, but dispersion uniformity and stability deteriorate leading to agglomeration
Solution Approach 1:
The patent changes the chemical parameters of the dispersant system by introducing aromatic imide groups with electron-withdrawing substituents. These parameter changes enhance the dispersant's capacity to handle higher particulate solid loads while maintaining dispersion uniformity, allowing formulations to achieve both high color strength and stable distribution.
Solution Approach 2:
The aromatic imide dispersant acts as an intermediary between high concentrations of particulate solids and the liquid medium. It mediates the interaction by providing steric and electrostatic barriers that prevent agglomeration even at high solid loads, enabling formulations to achieve high pigment concentrations with maintained uniformity.
3Adaptability or versatility
If existing dispersants are used in aqueous media, then some dispersion is achieved, but compatibility and stability under ambient and high-temperature conditions are insufficient
Solution Approach 1:
The patent changes the thermal and chemical parameters of the dispersant by incorporating aromatic imide structures with stable functional groups. These parameter changes provide both aqueous and organic media compatibility while ensuring reliability under ambient and high-temperature storage conditions, allowing the dispersant to maintain effectiveness across a wide temperature range.
4Manufacturing precision
If more conventional dispersants are added to achieve better pigment dispersion, then dispersion quality improves, but formulation complexity and cost increase
Solution Approach 1:
The aromatic imide dispersant exhibits multi-functionality by effectively dispersing particulate solids in both organic and aqueous media, providing temperature stability, and working with various pigment types. This universality allows a single dispersant to replace multiple conventional dispersants, simplifying formulations while maintaining or improving dispersion quality.
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 polymer effectively increases particulate solid load, improves brightness, and maintains stability under ambient and high-temperature conditions, resulting in improved tinctorial properties and reduced viscosity in ink and paint compositions.
Implementation Method 1
Many formulations such as inks, paints, millbases and plastics materials require effective dispersants for uniformly distributing a particulate solid in an aqueous, a polar or a non-polar organic medium
Implementation Method 2
The pigment dispersion should be compatible with the different formulations used to ensure good adhesion and resistance of the final coating
Data Source
AI summary
The present invention relates to a composition containing a particulate solid, an organic or aqueous medium and a dispersant that may be a reaction product of an organic di or polyepoxide with a primary amine, aminoalcohol, amino acid, hydroxyacid or alcohol containing a fused or non-fused aromatic imide group. The invention further provides compositions for coatings, inks, toners, plastic materials (such as thermoplastics), plasticisers, plastisols, crude grinding and flush.