Solid Pigment Concentrate with Polyamine Dispersant
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Solution Overview
Problem
Existing pigment pastes face issues such as dust formation, lumping, inadequate dispersion, and reduced color strength when mixed with base paints, leading to health and safety concerns and inaccurate tinting, while also being incompatible with all types of base paints and increasing volatile organic content.
Innovation Solution
A solid pigment concentrate comprising a polyamine backbone with hydrophobic pendent groups and a non-ionic surface-active agent with polyoxyalkylene groups, which allows for easy dispersion in both solvent-based and water-based paints, maintaining high color strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pigment pastes are used to prevent dust formation and lumping, then dispersion quality improves, but color strength is diluted due to non-colorant materials
Solution Approach 1:
The invention changes the physical state parameter of the pigment concentrate from liquid paste to solid form (powder, granules, or tablets). This parameter change eliminates the need for large amounts of solvents and non-colorant materials required in liquid pastes, thereby concentrating the colorant and maintaining high color strength while still achieving proper dispersion when the solid concentrate is mixed with the base paint.
2Reliability
If pigment pastes with binders and additives are used to ensure stability, then dispersion improves, but compatibility with all base paint types is reduced
Solution Approach 1:
The invention extracts and removes the problematic components (binders, surfactants, dispersants, and high levels of solvents) from the pigment concentrate formulation. By taking out these substances that cause incompatibility issues with certain base paint types, the invention creates a universal pigment concentrate that can be used with all types of base paints while maintaining dispersion stability through the solid concentrate formulation itself.
Solution Approach 2:
The solid pigment concentrate is designed to be universally compatible with all types of base paints (water-based, solvent-based, high solids, etc.) without requiring formulation adjustments. The single solid concentrate formulation performs the function of preventing dust formation, avoiding lumping, and ensuring proper dispersion across all paint types, eliminating the need for separate paste formulations for different paint categories.
3Ease of operation
If pigment pastes with solvents and co-solvents are used to achieve proper flow, then ease of mixing improves, but volatile organic content increases
Solution Approach 1:
The invention changes the physical state from liquid paste to solid concentrate, fundamentally altering the formulation parameters. This parameter change eliminates or drastically reduces the need for volatile solvents and co-solvents that contribute to high VOC content. The solid concentrate maintains ease of mixing by being designed to rapidly disperse and dissolve in the base paint, achieving proper flow without relying on volatile organic compounds.
4Quantity of substance
If solid pigment concentrates are used to maintain color strength, then color concentration improves, but dispersibility in solvent borne paints is reduced
Solution Approach 1:
The invention applies preliminary action by pre-formulating the pigment in a solid concentrate that is specifically designed to rapidly disperse and dissolve when contacted with base paint. The solid concentrate undergoes preliminary preparation in the form of a stable, free-flowing powder or granule that is optimized for rapid wetting and dispersion. This preliminary action ensures that even in solvent-borne paints, the high concentration of colorant disperses efficiently without requiring pre-dilution in solvents.
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 solution enables efficient and rapid dispersion of pigments in various base paints, achieving high color strength and stability, while minimizing environmental impact and ensuring compatibility with different paint types.
Implementation Method 1
a non-ionic surface-active agent comprising polyoxyalkylene groups, e.g., polyoxyethylene groups
Data Source
AI summary
Solid pigment concentrate comprising at least one pigment and a dispersant comprising a polyamine backbone and one or more hydrophobic pendent groups, characterized in that the concentrate further comprises a non-ionic 5 surface active agent comprising polyoxyalkylene groups. The polyamine backbone can for instance comprise polyalkylene imine building blocks.