German Technical Background VOK-3650 Nano Auxiliaries Used to Improve Scratch Resistance of Solventborne Automotive Coatings Replaces BYK-3650

German technical background VOK®-3650 nano auxiliary

VOK®-3650 Surface treated nano-silica particle dispersions for improved scratch resistance of solventborne automotive coatings, industrial coatings or wood and furniture coatings. 

Product Information 

Chemical composition 

Surface treated silica nanoparticle dispersions. 

Typical physical and chemical data The data given on this data page is only typical values, not technical indicators of the product. 

Density (20 °C): 1.15 g/ml No

Volatile (20 min., 150 °C): 31% 

Carrier: propylene glycol methyl ether acetate / propylene glycol monomethyl ether 

Flash point: 45 °C 

Nanoparticle content: 25% 

Particle size D50: 20 nm 

Viscosity (20 °C): 10 mPa·s 

Storage and transportation Storage and transportation below 40 °C. Mix well before use. 

Special reminder 

Since dry material can cause the final paint to pour, the dry material on the surface of the container must be removed before dosing. The propylene glycol monomethyl ether contained in the additive does not affect the performance of two-component polyurethanes. 

Application areas 

Coatings industry

Features and benefits 

This additive provides the so-called "quick repair effect"; Silica nanoparticles are evenly distributed in the coating system, and their role is like a shock absorber that can absorb impact energy and then release slowly, which leads to the coating having a certain elasticity while remaining unchanged, leaving almost no traces after mechanical impact, and almost no damage to the coating surface; Therefore, it provides good long-lasting protection.