Characteristics of aqueous dispersants with excellent alkali resistance
Water-based dispersants with excellent alkali resistance are crucial in applications where coatings and inks are exposed to alkaline environments, such as in construction coatings, concrete coatings, and some industrial coatings. These dispersants maintain stability and effectively disperse pigments and fillers, preventing precipitation or agglomeration even in high-pH conditions. Below are the key features of water-based dispersants with excellent alkali resistance:
1. Stable Dispersion
Alkali-resistant water-based dispersants maintain stable dispersion performance in high pH environments without causing pigment re-agglomeration or settling due to the presence of alkaline substances.
These dispersants typically provide long-term stability, making them suitable for water-based coatings exposed to high pH conditions, such as in architectural coatings and concrete coatings.
2. Excellent Surface Activity
They possess strong surface-active properties, effectively lowering the surface tension of pigment particles, making them easier to wet and disperse, thus preventing pigment agglomeration.
In high pH environments, water-based dispersants ensure even distribution of pigments throughout the coating system, enhancing the color strength and consistency of the coating.
3. Good Chemical Resistance
These dispersants exhibit excellent chemical resistance to high pH environments, withstanding the impact of alkaline substances without degrading or losing dispersion efficacy.
This is particularly important for applications that come into contact with strong alkaline substances, such as cleaners or certain industrial coatings.
4. Wide Pigment Compatibility
Alkali-resistant water-based dispersants are often compatible with a wide range of pigments, including organic pigments, inorganic pigments, titanium dioxide, carbon black, and more. They provide effective dispersion, even for pigments that are sensitive to alkaline conditions.
5. Enhanced Coating Performance
In addition to dispersing pigments, these dispersants improve the flow, leveling, and adhesion properties of the coating, contributing to higher-quality final coatings.
In some specialized applications, they can also improve the coating’s weather resistance and anti-soiling properties, particularly for outdoor use.
6. Environmental Friendliness
Many alkali-resistant water-based dispersants meet environmental standards, offering low VOC or VOC-free formulations, making them suitable for industries with strict environmental requirements, such as construction and home coatings.
Common Applications:
Architectural Coatings: To improve adhesion and stability to alkaline substrates like cement.
Industrial Coatings: For applications such as concrete or steel surface coatings that require alkali resistance.
Wood Coatings: Used in treatments where the wood surface is exposed to high pH conditions.
Pigment/Fillers Dispersion: Especially useful for dispersing pigments and fillers in coatings, such as titanium dioxide and carbon black.
Anjeka-6190A is a polymer dispersant, a standard additive for resin-free pigment concentrates for aqueous coating systems, printing inks and adhesives. It is mainly used for grinding inorganic pigments such as titanium dioxide, matting powder, calcium powder, etc. It has good viscosity reduction properties and excellent resistance to strong alkali.
This additive causes pigment deflocculation through spatial stabilization. Due to the small particle size of the deflocculated pigment, it is possible to obtain a high gloss, as well as increase in color strength. In addition, the transparency of transparent pigments and the hiding power of opaque pigments are improved. Due to the reduced viscosity, the flow properties are improved and the pigment content can be increased. The additive is particularly suitable for the production of stable, resin-free pigment.