German technical background VOK-3900P leveling agent Used for anti-shrink holes in powder coatings replaces BYK-3900P

German technical background  VOK-3900P leveling agent

VOK-3900 P powdered polyacrylate standard anti-crater and leveling additive for powder coatings. Leveling aid for improved tolerance to impurities. 

Product information 

Chemical composition 

Polyacrylate adsorbed on silica 

Typical physicochemical data 

The data presented on this data page is typical and not a product specification. 

Acrylate content: 63% 

Density (20 °C): 1.28 g/ml 

Residue after calcination: 34% 

Purchase form: powder 

Application areas 

Powder coating 

Product Features & Benefits VOK-3900 P is a very effective leveling and anti-crater additive for particularly sensitive powder coating systems. Increased tolerance of powder coating systems to impurities during powder coating production and application ("post-wetting" effect). VOK-3900 P protects against cratering, pinholes and other surface defects in powder coatings. 

Recommended Use 

Recommended for

Powder coatings based on epoxy, polyester/epoxy, polyester, polyurethane and acrylates. It is also suitable for powder coating systems using UV curing. 

Recommended dosage 

0.5-1.5% additive dosage (form of supply) is based on total formulation. 

The above recommended dosage is for reference, and the appropriate dosage needs to be determined through a series of tests. 

Addition method and processing guidance 

The additive is mixed with resins, curing agents, pigments and other raw materials in a high-speed disperser and then extruded. The additive achieves good dispersion through the extruder, which improves the gloss and leveling of the powder coating and prevents the formation of craters, fisheyes and granulation.