German technical background VOK-991 Wax auxiliaries It can improve surface properties replaces BYK-991

German technical background  VOK®-AP 991 wax auxiliary

VOK®-AP 991 Polyethylene-based micronized wax for solventborne coating systems and powder coatings to improve surface properties. Product Information 

Chemical composition 

Polyethylene micronized wax. 

Typical materialized data 

The data presented on this data page are typical values only and are not technical indicators of the product. 

Density: 0.95 g/ml 

Melting point: 115 °C 

Particle size distribution (laser diffraction, volume distribution): D50: 5 μm D90: 9 μm 

Form of supply: Micronized 

The additive can be used in food contact applications. To find out the status of food contact regulations for this product, please contact our Product Safety Department or visit the website:

Storage and transportation 

The product is temperature sensitive and must be stored and transported below 50 °C. 

Application areas 

Coatings and printing inks 

Features and benefits 

This additive increases surface slip and improves surface protection and is recommended for solventborne and solvent-free systems. 

Recommended dosage 

0.3-0.5 % additive (purchased form) is based on the total formulation, in the printing ink. 

The above recommended addition amount is for reference, and the suitable addition amount needs to be determined by a series of tests. 

Incorporation method and processing guidance 

The additive is best added at a low shear rate at the end of production.

Powder coating 

Features and benefits 

The additive is recommended for powder coating matting and also improves surface slip and surface protection. 

Recommended use 

VOK®-AP 991 is recommended for powders based on polyester/TGIC/β-hydroxyalkylamide, polyester/epoxy, acrylic, polyurethane and epoxy. 

Recommended dosage 

0.5-2 % additive (purchased form) based on total formulation. 

The above recommended addition amount is for reference, and the suitable addition amount needs to be determined by a series of tests. 

Incorporation method and processing guidance

VOK®-AP 991 should be mixed and stirred with resins, curing agents, pigments and other additives at high speed, and then all extruded and discharged.