Solid Pigment Preparations with Aldehyde Resin
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Solution Overview
Problem
Existing pigment preparations fail to achieve homogeneous mixing of organic and inorganic pigments, leading to suboptimal incorporation into application media and color strength, particularly in the red-orange-yellow color range, where lead chromate and lead molybdate pigments are being phased out.
Innovation Solution
A process involving comminution of organic and inorganic pigments in an aqueous medium with a water-soluble/water-dilutable aldehyde or ketone resin, ensuring uniform wetting and mixing, resulting in pigment preparations with high color strength and homogeneity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If organic and inorganic pigments are mixed by dry grinding, then the process is simple and quick, but the mixing homogeneity is poor and incorporation into application media is suboptimal
Solution Approach 1:
A water-soluble/water-dilutable aldehyde or ketone resin is introduced as an intermediary substance to facilitate homogeneous mixing of organic and inorganic pigments. The resin acts as a binding medium that promotes uniform distribution of pigment particles and improves incorporation into application media, resolving the contradiction between mixing quality and process simplicity.
Solution Approach 2:
The invention changes the physical state and composition parameters by introducing a resin component (0.5 to 20% by weight) into the pigment mixture. This parameter change transforms the dry mixing process into a resin-bound pigment preparation process, achieving superior mixing homogeneity while maintaining practical applicability.
2Stability of the object's composition
If dispersants are added during aqueous grinding, then pigment dispersion improves, but the number of additives and process complexity increase
Solution Approach 1:
The aldehyde or ketone resin performs multiple functions simultaneously: it acts as a binding agent, a dispersant, and a medium for homogeneous pigment mixing. This multi-functionality eliminates the need for separate dispersant additives, achieving good pigment dispersion while minimizing the number of substances added to the system.
3Ease of operation
If resin is used to bind pigments, then incorporation into application media improves, but color strength may be diluted
Solution Approach 1:
The invention optimizes the resin content parameter (0.5 to 20% by weight) to achieve the right balance between incorporation ease and color strength. By controlling the resin-to-pigment ratio, the preparation maintains high color strength while benefiting from improved incorporation properties provided by the resin binder.
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 process achieves a homogeneous mixing of organic and inorganic pigments, maintaining or exceeding the color strength of dry-mixed preparations, and is suitable for various applications including paints, inks, plastics, and cosmetics, with the resin's modification allowing for improved pigment dispersion and stability.
Implementation Method 1
ensuring uniform wetting and mixing
Data Source
AI summary
The invention relates to solid pigment preparations containing, as essential components, (A) 80 to 99.5 wt. % of a pigment component from at least one organic pigment (A1) and an inorganic pigment (A2) and (B) 0.5 to 20 wt.- % of at least one water-soluble/water-dilutable aldehyde or ketone resin.