German technical background VOK-100 Wax dispersion It can improve the directional effect of effect pigments replaces BYK-100

German technical background  VOK?-AP 100 wax dispersion

Dispersion of VOK?-AP 100 ethylene vinyl acetate copolymer wax for solventborne effect coating systems; Improve the directional effect of the effect pigment and reduce the settlement in the tank. 

Product Information 

Chemical composition 

Dispersion of vinyl acetate copolymer wax. 

Typical materialized data 

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

Non-volatile: 10 % 

Carrier: 1/1 xylene, butyl acetate 

Melting point (wax composition): 105 °C 

Fineness: 25 μm 

Viscosity (23 °C): 13 mPa·s 

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Storage and transportation 

The product is temperature sensitive. Store and transport below 35°C, stir well before use. 

Special reminder 

Granulation test method: disperse the wax additive at 4 m/s for 5 min, then add 20% butyl acetate, keep 4 m/s stirring for 2 min, and scrape the plate on the glass plate with a 100 um film coater. The coating film drying process should be transparent and free of particles.

Fineness test method: scraper fineness meter, ISO1524, disperse the wax additive at 4 m/s for 5 minutes, test with 50 um scraper fineness meter, fineness: 25 um. 

Application areas 

Coatings industry 

Features and benefits 

The additive can improve the directional arrangement of effect pigments such as aluminum powder and pearlescent powder, and improve the effect of heterochromic light at angle; Reduction of short-wave defects (piebald, Bernard vortex), improved leveling of the next varnish overhead; Prevents settling in the tank. 

Recommended use 

VOK?-AP 100 is recommended for solventborne primers and single-coat metallic industrial topcoats.

Recommended dosage 

The 30% additive dosage (purchased form) is based on solid resin. 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, stirring well before use, dispersing the wax additive at 4 m/s, and adding the resin solution under stirring. In the CAB-containing system, the CAB solution should be dispersed evenly with the resin solution at high speed (> 5 m/s), and then the stirred wax slurry should be added. Pigment paste and solvent should be added under stirring.