German Technical Background VOK-378 Leveling Agent For Improved Slip in Solventborne and Solvent-free Systems Replaces BYK-378

German technical background  VOK-378 leveling agent

VOK-378 is a silicone surface additive for aqueous, solventborne and solvent-free systems. Strongly reduces surface tension and improves slipperiness. 

Product data 

Chemical composition 

Polyether modified dimethylpolysiloxane 

Typical physicochemical data 

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

Density (20 °C): 1.02 g/ml 

Refractive index (20 °C): 1.440 

Application information 

Coatings industry 

Features and benefits 

The additive significantly increases surface slip and thus scratch resistance. VOK-378 drastically reduces surface tension, resulting in good substrate wetting and good crater resistance, while also preventing "frame" effects. In matte systems, the additive improves the orientation of matting agents. VOK-378 has a good effect even at low dosages and has low foam stability. The additive exhibits broad compatibility in aqueous, solventborne and solvent-free systems, is easy to recoat, and does not cause oil spots. 

Recommended for 

Architectural coatings 

Automotive coatings 

Canned coatings 

Industrial coatings

Leather coatings

Wood and furniture coatings

Recommended dosage 0.01-0.3 % The additive (supplied form) is based on the total formulation and can be increased to 0.5% in exceptional cases. 

The above recommended dosage is for reference only, and a good dosage must be determined by a series of experiments. 

Joining methods and processing instructions 

The additive can be added at any stage of the production process, including post-adding. 

Adhesive 

Features and benefits 

The additive drastically reduces the surface tension and thus has good substrate wettability. VOK-378 also has good results at low addition amounts and low foam stabilization. The additive has no negative effect on adhesion and does not migrate. Recommended for 

VOK-378 can be used with all common reactive adhesives such as polyurethane, epoxy or acrylic adhesives. 

Recommended dosage 

0.01-0.3% additives (supplied form) are based on the total formulation and can be increased to 0.5% in exceptional cases. 

The above recommended dosage is for reference only, and a good dosage must be determined by a series of experiments. 

Joining methods and processing instructions 

The additive can be added at any stage of the production process, including post-adding.