Benzoic acid and sodium benzoate
Benzoic acid and sodium benzoate can non-selectively press the activity of microbial cell respiratory enzymes, so that the metabolism of microorganisms is hindered, and then effectively press the growth and reproduction of a variety of microorganisms, and no adverse effects on the growth and reproduction of animals. Sodium benzoate is mainly used in feed, and the general application amount does not exceed 0.1%.
The effect of dry film thickness in baking paint on the gloss of the coating film (precipitation and gas phase matting agents) The thickness of the coating film increases and the gloss increases, and the results are the same for the three types of synthetic silica matting agents.
Influence of construction process
Under the same other conditions, the effect of the construction process on the gloss of the coating film.
Add 2% matting agent TS100 to the two-component polyurethane varnish, and use different processes to apply. The gloss of spraying is the lowest, followed by roller coating, and the gloss of brushing is the highest. In addition, the type of solvent in the coating system, the volatilization speed, the choice of additives (such as dispersant and leveling agent), the drying method of the coating film and the type of substrate will all have an impact on the gloss of the coating film. In summary, the parameters affecting the matting performance of the coating film can be summarized.
Parameters affecting the matting performance of the coating film
Matting agent addition, dispersion, construction method, dry film thickness, ptfe powder cas no drying conditions, substrate type
Resin type solvent additives solid content
Due to differences in coating systems and construction methods, the matting agent should be screened according to the characteristics of the matting agent to achieve the maximum performance/price ratio. At present, major companies producing matting agents have developed a variety of brands of products to meet the needs of different users.
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