As the construction industry connects with the world, exterior wall coating is becoming more and more widely used. Water-based paint coatings with water as the medium are more in line with the requirements of green and environmental protection than solvent-based exterior wall coatings. water-based paint coatings have been used in developed countries for decades. Not only have they not been replaced by other products, they have been constantly updated, proving the rationality of their existence.
After applying thickener in water-based paint
With the development of the economy and the changes in people's concepts, it has become fashionable to use high-end internal water-based paint coatings to replace mosaics and ceramic tiles to decorate the walls in China. Water-based paint coatings have become the popular interior and exterior wall decorative materials because they are non-toxic, easy to clean, rich in color, and do not cause pollution to the environment. They are low in engineering cost.
is more important in high-performance water-based coating associative thickeners than other types of thickeners, because they have unique properties, which can achieve better leveling, brushing, and reduce splashing during construction. They can also give dry film better water resistance. These properties are derived from their unique chemical structure.
Thickening mechanism of water-based paint thickener
Associated thickener is a water-soluble polymer, which can be an acrylate polymer, cellulose ether or a high-performance nonionic product (such as polyethylene glycol ). These polymers are water-insoluble hydrophobic groups. Such as fatty alcohol blocked. In aqueous solutions or emulsions, these polymers can form network structures to increase the degree of loss. The water-soluble backbone polymer is dissolved in water. The hydrophobic end adsorbs the hydrophobic emulsion polymer particles, or forms a micelle structure with the hydrophobic portions of other polymers. Since each associative thickener polymer contains at least two hydrophobic end groups, a three-dimensional network is formed in the latex, thereby increasing the viscosity. This mainly affects high and medium shear shuffles, so it has better spray resistance and brushing properties during construction than other thickener . Features of
Water-based paint thickener
1, can improve medium and high shear viscosity and provide good fluidity under low shear.
2, excellent can opening effect, efficient thickening, and good comprehensive thickening leveling performance.
3, excellent compatibility with various aqueous resin systems, improve film formation, and make the paint film full of luster.
4, improve tensile strength , shear strength , bonding strength and adhesion.
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