Method for preparing powder coating through two compositions

Abstract

The invention relates to a method for preparing powder coating through two compositions. The method includes the following steps that according to the compositions of the powder coating, the powder coating is divided into a curing group including resin, a curing agent, a filler and an addition agent and a pigment group including the resin, the filler, a catalyst and required color materials; according to the order requirements, the compositions of the curing group are adjusted to prepare colorless powder coating base materials; according to the order requirements, the content of each componentin the pigment group is determined to prepare powder coating ingredients with the required colors; and the curing group and the pigment group are mixed in a certain proportion to obtain a final product. The method for preparing the powder coating through the two compositions has the beneficial effects that according to the production characteristics of the powder coating, the powder coating is divided into the curing group and the pigment group, according to the order requirements, the compositions of the curing group and the compositions of the pigment group are separately adjusted, diversified combination of the powder coating production process is realized, the curing group or the pigment group are separately prepared, the production efficiency can be greatly improved, the problem of coating coking in the conventional powder coating production process is solved, and the cost of the powder coating customized by a customer is lowered.

Description

technical field [0001] The invention relates to the technical field of powder coating preparation, in particular to a method for preparing powder coatings with two components. Background technique [0002] Powder coating is a new type of environmentally friendly coating. Due to its 100% film-forming substance, no solvent volatilization, full coating film and excellent physical properties, it is one of the development directions of coatings vigorously advocated by the country at present, forming a trend of gradually replacing ordinary solvent-based coatings. . However, the production of powder coatings also has its certain limitations. One is that powder coatings can only be produced according to orders. Like ordinary liquid coatings, the color paste that has been rolled in advance can be used for later color mixing. Therefore, there are many powder coatings produced. The process cannot be pre-processed, resulting in uneven distribution of powder coating production capacity....

AI Technical Summary

Problems solved by technology

However, the production of powder coatings also has its certain limitations. One is that powder coatings can only be produced according to orders. Like ordinary liquid coatings, the color paste that has been rolled in advance can be used for later color mixing. Therefore, there are many powder coatings produced. The process cannot be pre-processed, resulting in uneven distribution of powder coating production capacity. When orders are concentrated, due to limited production capacity, product delivery will be delayed; second, due to the thermosetting process characteristics of powder coatings, through melt extrusion, when adjusting It needs to be melted and extruded repeatedly in the extruder. When the resin and curing agent are heated for a long time, it is easy to produce local coking to form coked material, or even completely solidified. On the one hand, the product will be scrapped; It cannot be softened during curing, which will affect the quality of the coating film; third, in order to avoid coking when the extruder is shut down, the machine must be cleaned before each shutdown, that is, the powder coating components in the extruder barrel are driven out with resin. , which can ensure the normal start-up when the next start-up is started, the production process is relatively cumbersome