Defoamer for paint and its preparation process

Abstract

The invention discloses a defoaming agent for coating. The deforming agent for coating is prepared from the following components in parts by weight: 14 to 20 parts of ethydene bis-palmitamide, 5 to 12 parts of ethylene distearamide, 9 to 20 parts of tetramethyl ammonium hydroxide, 3 to 8 parts of fatty alcohol-polyoxyethylene ether, 33 to 39 parts of kerosene, 10 to 18 parts of white oil, 6 to 14 parts of aluminum dibutyrate, 3 to 8 parts of aluminum linolenate and 6 to 12 parts of aluminum dilinoleate. The defoaming agent provided by the invention can obviously reduce small bubbles produced when wall surfaces is coated with the coating, guarantee the integrity of the wall surfaces coated with the coating and simultaneously improve the attractiveness. The invention further discloses a process for preparing the defoaming agent for coating. The process comprises the following steps: uniformly mixing all the components, then putting the mixture in a reaction kettle, and preserving heat for 10h at temperature of 180 DEG C to obtain a product A; grinding the product A to obtain the defoaming agent for coating. The process for preparing the defoaming agent for coating provided by the invention is simple in steps, easy to operate and low in preparation cost.

Description

technical field [0001] The disclosure generally relates to the technical field of coatings, in particular to wall coatings, and in particular to a defoamer for coatings and a preparation process thereof. Background technique [0002] The development of modern science and technology has put forward high-quality and high-efficiency requirements for the coating industry. That is, water-based paints and solvent-based paints. Various additives should be used in the formulation, including additives that help pigments to wet and disperse; additives that improve the storage stability of finished coatings; additives that adjust the appearance of paint films; and Some additives to achieve special functions. Most of the above-mentioned additives are surfactants, which can change the surface tension of the paint, so that the paint itself has internal factors that are easy to foam or stabilize the foam. Therefore, it was found during use that the wall coated with paint There are a larg...

AI Technical Summary

Problems solved by technology

Most of the above-mentioned additives are surfactants, which can change the surface tension of the paint, so that the paint itself has internal factors that are easy to foam or stabilize the foam. Therefore, it was found during use that the wall coated with paint There are a large number of small air bubbles on the surface, which seriously affects the coating effect