Polyepoxide Dispersant for Pigment Stability
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Solution Overview
Problem
Existing paint and ink formulations face challenges with high mill base viscosity, poor pigment dispersion, and shear thinning issues, particularly in aqueous systems, which affect the stability and performance of coatings and inks.
Innovation Solution
A polymer composition with polyepoxide and polyether lateral chains, combined with pendant hydrocarbyl groups, is used as a dispersant in a particulate solid and organic or aqueous medium, enhancing pigment dispersion and stability through specific molecular structures and reaction processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conventional dispersants are used in paint and ink formulations, then pigment dispersion is achieved, but mill base viscosity becomes excessively high
Solution Approach 1:
The patent modifies the chemical structure of epoxy resin by introducing polyether lateral chains with pendant hydrocarbyl groups, changing the molecular parameters to achieve both low viscosity and good dispersion. The specific structural parameters (polyether chain length, hydrocarbyl group size) are optimized to balance viscosity reduction with dispersant functionality.
Solution Approach 2:
The invention creates a composite molecular structure combining epoxy resin backbone with polyether lateral chains and hydrocarbyl pendant groups. This composite structure integrates the beneficial properties of different chemical components: epoxy for adhesion, polyether for flexibility and low viscosity, and hydrocarbyl groups for pigment compatibility.
2Stability of the object's composition
If conventional dispersants are used, then some pigment dispersion is achieved, but shear thinning problems persist
Solution Approach 1:
The patent changes the rheological parameters of the formulation by using the modified epoxy resin dispersant, which maintains stable viscosity under shear conditions. The molecular architecture with flexible polyether chains and bulky hydrocarbyl groups provides steric stabilization that prevents shear thinning behavior.
3Stability of the object's composition
If conventional dispersants are used in aqueous systems, then dispersion is achieved, but stability and performance are compromised
Solution Approach 1:
The patent changes the chemical parameters of aqueous-based dispersants by incorporating hydrophobic hydrocarbyl groups into the polyether chain structure. This modification enables the dispersant to effectively interface with hydrophobic pigments in aqueous media, improving both dispersion quality and long-term stability of coatings.
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 composition achieves enhanced mill base viscosity, improved pigment dispersion, increased pigment loading, and reduced shear thinning, leading to more stable and efficient ink and paint formulations.
Implementation Method 1
The invention further relates to a composition containing a particulate solid, an organic or aqueous medium, and a polyepoxide with polyether lateral chains and pendant hydrocarbyl groups
Implementation Method 2
The polymer composition achieves enhanced mill base viscosity, improved pigment dispersion, increased pigment loading, and reduced shear thinning
Data Source
AI summary
The invention relates to a composition containing a polyepoxide with polyether lateral chains and pendant hydrocarbyl groups. The invention further relates to a composition containing a particulate solid, an organic or aqueous medium, and a polyepoxide with polyether lateral chains and pendant hydrocarbyl groups. The invention further relates to novel compounds, and the use of the polyepoxide with polyether lateral chains and pendant hydrocarbyl groups as a dispersant.