Effect Pigment Paste Production Without Grinding Media
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Solution Overview
Problem
Existing processes for producing effect pigment pastes often result in dust emissions, require lengthy processing times, and necessitate downstream cleaning steps due to the use of grinding media, which can damage the pigments and complicate the separation process.
Innovation Solution
A process involving steps (1) and (2) where a mixture of effect pigment and polymer in a liquid medium is produced, followed by dispersing using a shaker to create an effect pigment paste without grinding media, ensuring the paste contains at least 5% effect pigment by weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If grinding media are used for homogenization, then dispersion quality is improved, but separation complexity and pigment damage increase
Solution Approach 1:
The invention extracts and eliminates the harmful grinding media from the dispersion process. Instead of using grinding media that require subsequent separation, the patent employs a dissolver with optimized geometry that achieves effective dispersion without any grinding media, thereby eliminating the separation step entirely.
Solution Approach 2:
The invention replaces the mechanical grinding action with a dissolver-based mixing system. The dissolver uses a specific geometric design that creates effective fluid circulation and shear forces to achieve homogeneous dispersion without mechanical contact between grinding media and pigment particles, thus avoiding pigment damage and separation complexity.
2Stability of the object's composition
If dissolvers or stirrers are used for homogenization, then pigment dispersion is achieved, but dust emissions and processing time increase
Solution Approach 1:
The invention changes the operational parameters of the dissolver system, specifically optimizing the rotation speed, immersion depth, and geometric parameters of the dissolver blades. These parameter optimizations enable effective pigment dispersion while minimizing dust emissions and reducing the time required to achieve homogeneous mixing.
3Stability of the object's composition
If conventional stirrers are used, then mixing is achieved, but processing time and cleaning requirements increase
Solution Approach 1:
The invention employs a dissolver with dynamically optimized geometric parameters that adapt to the mixing process. The dissolver design includes specific blade angles, widths, and spacing that create optimal flow patterns and shear forces, enabling rapid and homogeneous mixing of pigment and binder, thereby significantly reducing processing time compared to conventional stirrers.
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 dust-free processing, reduces emissions, eliminates the need for grinding media separation, minimizes pigment damage, and shortens processing times, resulting in a consistent quality of effect pigment pastes.
Implementation Method 1
step (2) is performed using a shaker
Data Source
AI summary
Described herein is a process for producing an effect pigment paste including at least steps (1) and (2), namely producing a mixture including at least one effect pigment (a) and at least one polymer (b) in a liquid medium (c) (step (1)), and dispersing the mixture obtained after step (1) to obtain the effect pigment paste (step (2)), where step (2) is performed using a shaker and the effect pigment paste obtained after the performance of step (2) has ended is free of grinding media. Also described herein are an effect pigment paste producible by this process, containing an amount of effect pigment of at least 5% by weight, based on the total weight of the effect pigment paste, and a method of using a shaker for dispersing of effect pigments for production of an effect pigment paste.