Solid Pigment Preparations with Dual Polyether Additives
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Solution Overview
Problem
Existing pigment preparations for liquid systems, such as coatings and inks, require additional auxiliaries for stabilization and are not universally effective in aqueous vinyl acetate dispersions or solvent-containing systems, lacking in color strength and dispersibility.
Innovation Solution
A solid pigment preparation comprising at least 60% pigment or filler, 1-39% nonionic water-soluble surface-active additives based on polyethers, and 1-39% nonionic water-insoluble surface-active additives, with optional additional additives, produced through wet-comminution and drying, to enhance color strength and dispersibility across various application media.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If liquid formulations are used for pigmentation, then color properties and dispersibility can be achieved, but additional auxiliaries are required for stabilization and handling becomes more complex
Solution Approach 1:
The patent combines pigment particles with nonionic surface-active additives based on polyethers to form a unified solid preparation. This merging integrates the dispersant function directly into the pigment structure, eliminating the need for separate auxiliary additives while maintaining color properties and dispersibility in liquid formulations.
Solution Approach 2:
The patent extracts and eliminates the need for multiple stabilization auxiliaries by incorporating the essential surface-active components directly into the pigment preparation. The solid formulation achieves stable dispersion without requiring separate dried-crust inhibitors, freeze resistance enhancers, thickeners, and anti-skinners that are typically needed in liquid formulations.
2Ease of operation
If liquid formulations are simply dried to produce solid preparations, then handling becomes easier, but performance characteristics are not maintained
Solution Approach 1:
The patent performs preliminary action by pre-combining pigment particles with nonionic surface-active additives based on polyethers in a controlled solid-state formulation process. This preliminary integration of dispersant and pigment ensures that when the solid preparation is later applied to liquid systems, the performance characteristics are maintained without requiring complex liquid formulation processing.
Solution Approach 2:
The patent changes the physical state parameter from liquid to solid by formulating a solid preparation containing pigment and nonionic surface-active additives. This parameter change enables easier handling and storage while the chemical composition and surface-active properties are optimized to maintain performance characteristics when dispersed in liquid application media.
3Adaptability or versatility
If existing pigment preparations are used in aqueous vinyl acetate dispersions, then application is possible, but stir-in behavior and dispersibility are insufficient
Solution Approach 1:
The patent applies local quality by selecting specific nonionic surface-active additives based on polyethers with appropriate hydrophilic-lipophilic balance for aqueous vinyl acetate dispersions. These additives provide localized surfactant action at the pigment-liquid interface, ensuring excellent stir-in behavior and dispersibility specifically in water-based systems while maintaining compatibility with other media.
4Reliability
If existing pigment preparations are used in solvent-containing systems, then pigmentation can be achieved, but color strength and universality are limited
Solution Approach 1:
The patent achieves universality by formulating a solid pigment preparation containing nonionic surface-active additives based on polyethers that function effectively across multiple application media types. The nonionic character of the additives provides compatibility with both aqueous and solvent-containing systems, while the polyether structure ensures adequate solubility and dispersibility in various liquid phases, making the preparation universally applicable.
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 provides pigment preparations with high color strength and easy dispersibility in a wide range of media, offering improved stability and performance compared to traditional liquid formulations, with enhanced storage and handling characteristics.
Implementation Method 1
nonionic surface-active additives based on polyethers
Implementation Method 2
particularly easy dispersibility (stir-in behavior)
Implementation Method 3
wet-comminuting the component (A) in an aqueous suspension
Implementation Method 4
drying the suspension
Data Source
AI summary
The present invention relates to a solid pigment preparation comprising, each percentage being based on the total weight of the preparation, (A) at least 60% by weight of a pigment component comprising one or more pigments and optionally a filler; (B) 1% by weight to 39% by weight of at least one nonionic water-soluble surface-active additive based on polyethers having an HLB value of greater than 10, (C) 1% by weight to 39% by weight of at least one nonionic surface-active additive based on polyethers having an HLB value of less than 10; (D) 0% by weight to 10% by weight of an additive component comprising at least one further additive, the sum total of the weight fractions not exceeding 100% by weight. The present invention further relates to processes for production thereof and to processes for coloring macromolecular materials.