Pigment Yellow 155 Copolymer Dispersibility Viscosity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing pigment preparations based on C.I. Pigment Yellow 155 fail to achieve good dispersibility in monomer mixtures used for chemical toner production, requiring a specific choice of polymer envelope and often resulting in inadequate performance in terms of viscosity and hydrophobicity.
Innovation Solution
A solid pigment preparation comprising 5-99% by weight of C.I. Pigment Yellow 155 and 1-95% by weight of a copolymer with specific structural units, which enhances dispersibility and hydrophobicity, allowing for rapid color strength development at low shearing forces and low viscosity in monomer mixtures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional pigment preparations are used, then color strength can be achieved, but dispersibility in monomer mixtures is inadequate and requires specific polymer envelope selection
Solution Approach 1:
A copolymer consisting of styrene, (meth)acrylate, and amino(meth)acrylate structural units is introduced as an intermediary dispersant. This copolymer specifically mediates between the hydrophobic pigment particles and the monomer mixture, enabling effective dispersibility without requiring complex polymer envelope selection. The copolymer's amphiphilic structure allows it to adsorb onto pigment surfaces while maintaining compatibility with the monomer phase.
Solution Approach 2:
The invention changes the chemical composition parameters of the dispersant system by using a specific copolymer with defined structural units (styrene, (meth)acrylate, amino(meth)acrylate) in specific molar ratios. This parameter change transforms the dispersant properties to achieve optimal performance in chemical toner processes, eliminating the need for extensive polymer envelope selection.
2Reliability
If high pigment loading is used to achieve color strength, then coloration performance improves, but viscosity of the pigment dispersion increases
Solution Approach 1:
The copolymer acts as a mediator that prevents pigment particle aggregation even at high loadings. By providing steric stabilization and improving interfacial compatibility, the copolymer allows high pigment concentrations to be achieved without the expected increase in viscosity, thus decoupling color strength from viscosity penalties.
3Reliability
If conventional pigment preparations are used, then process simplicity is maintained, but hydrophobicity is insufficient for chemical toner processes
Solution Approach 1:
The invention changes the hydrophobicity parameter by incorporating styrene and (meth)acrylate units with appropriate alkyl substituents into the copolymer structure. This compositional modification increases the hydrophobic character of the dispersant, ensuring adequate hydrophobicity for chemical toner processes while maintaining the simplicity of a single copolymer system rather than complex multi-component formulations.
4Productivity
If rapid color strength development is required at low shearing forces, then dispersibility must be high, but this typically requires complex dispersant systems
Solution Approach 1:
The copolymer serves as an efficient intermediary that enables rapid color strength development at low shearing forces through its specific structural units. The amino(meth)acrylate units provide strong adsorption to pigment surfaces, while styrene and (meth)acrylate units ensure compatibility with monomer mixtures, achieving rapid dispersibility without complex dispersant systems.
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 pigment preparation exhibits improved dispersibility and hydrophobicity, meeting the requirements for chemical toner production processes, including electrophotographic toners and developers, with enhanced performance in terms of viscosity and color strength development.
Implementation Method 1
surface modify pigments with pigment derivatives and low molecular weight compounds
Implementation Method 2
exhibits good dispersibility (rapid color strength development at low shearing forces)
Implementation Method 3
provides a low viscosity on the part of the pigment dispersion
Implementation Method 4
also has high hydrophobicity
Data Source
AI summary
The invention relates to a solid pigment preparation containingA) 5% to 99% by weight of PY 155 andB) 1% to 95% by weight of copolymer containing the following structural units:(i) 1 to 70 mol % of structural unit B1(ii) 1 to 70 mol % of structural unit B2(iii) 1 to 70 mol % of structural unit B3