Paint has many functions, and human beings are inseparable from it in their daily life. It not only provides a comfortable environment for human life, but also has a protective effect on the painted object and prolongs the service life of the object. With the increasing market demand for coatings, the quality requirements for coatings are not only good performance, but also environmental protection. This has requirements for coating manufacturers, in order to produce the best coatings, many additives will be used, for examplePaint defoamerIt is a chemical substance that eliminates the bubbles generated in the paint and improves the quality of the paint product.
Paint defoamer application scenario diagram).
There is more than one cause of foaming in coatings, and there are several reasons that can cause foaming: first, the solvent in the coating has a certain sensitivity to water, and the residual solvent can increase the absorption of water by the coating film and the transfer of moisture in the coating. If the adhesive of the coating itself is not strong, its water resistance will decrease, which will cause the loss of adhesion and cause the coating to blister. Secondly, the bubbles brought in during construction or the bubbles generated in the film-forming process are called air bubbles, such as the rapid volatilization of solvents, too thick brushing, high viscosity of the paint, and rapid movement of the brush during brushing, which may lead to the generation of air bubbles.
Coating foaming will have many hazards to the production and processing of coatings and the process of coating construction: first, the air in the foam will hinder the dispersion of pigments or fillers, so that the utilization rate of equipment is insufficient and affect the quality of coatings. Secondly, foaming can also affect the mixing rate, prolong the blending time, and cause the pigments and fillers to not be adequately wetted. Due to the presence of air bubbles in the paint, foam can also cause the drum to not be full, making the weight of the drum uneven and interfering with continuous packaging. During the construction process, the presence of foam may lead to a decrease in the adhesion of the coating, surface defects, unevenness, and rupture during film formation.
Paint defoamerIt is a composite product of organic polyether esterification, mineral oil and alcohol, which is refined by special process. It has the properties of self-emulsification, easy dispersion, strong versatility, good defoaming, and long foam inhibition time. It does not produce surface defects or affect film-forming, and has a special effect on water-based coating systems. In the production, packaging and application of coatings, it is useful for controlling foam generation, has good compatibility, lasts for a long time, and is useful over a wide pH range.