The main feature of acrylic painting is the use of acrylic pigments for painting. Polyacrylic acid pigment itself is water-soluble, and after drying, it forms a porous film and becomes water-resistant. Bright colors, bright colors, stable chemical changes, overlapping and soft pigment layers can be adhered to each other to form transparent or translucent, with strong adhesion, good weather resistance and durability.
raw material
Acrylic resin is the most important synthetic resin for painting, which can be divided into water-soluble, solvent-based and emulsion. The appearance of water-soluble and solvent-based resins is blocky or viscous liquid, colorless and transparent. The emulsion type (acrylic emulsion) is milky white in the undried stage and becomes transparent after drying.
Commonly used propylene pigments use polyacrylic acid emulsion as binder, and the main components are polymer and water, with polymer content of 45% and water and other substances content of 55%. The diameter of tiny solid particles is 0. 1um-0.2um, which is insoluble in water, but can be dispersed and suspended in water. According to the different proportion of acrylate monomers used, the film-forming properties of the obtained polymers can be divided into three types: soft, medium and hard.
Propylene pigment consists of oily pigment, constituent materials, adhesive, dispersant, wetting agent, tackifier, defoamer, antiseptic and mildew inhibitor, freezing stabilizer, film-forming stabilizer and PH regulator. As an adhesive, the basic components of polyacrylic acid emulsion polymerization are deionized water of monomer or monomer mixture, surfactant (emulsifier) and water-soluble initiator.
Because polyacrylic emulsion contains surfactant, it is very easy to foam. In order to eliminate foam, manufacturers usually use defoamers. If you choose the wrong variety or add too much defoamer, it will directly affect the paintability of the pigment. Therefore, manufacturers should make great efforts in selecting materials and using additives, and strive to achieve a more scientific and accurate ratio, so that the quality of domestic propylene pigments in "Going Up a storey still higher" can really be comparable to that of world-famous propylene pigments.