German technical background VOK®-SL 302 leveling agent replaces BYK-302 Used in printing inks to improve slip

German technical background  VOK®-SL 302 leveling agent

VOK®-SL 302 is a silicone surface additive for solvent-free, solventborne and waterborne coatings and printing inks with a medium reduction in surface tension and a moderate increase in slip. 

Product information 

Chemical composition 

Polyether-modified dimethicone. 

Typical physicochemical data 

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

Density (20 °C): 1.04 g/ml 

Application areas 

Coatings and printing inks 

Features and benefits 

The additive reduces the surface tension of the coating system moderately. It improves slip while improving leveling and gloss. As a silicone additive prevents the formation of Benard vortices. VOK®-SL302 can improve the wettability and anti-blocking properties of the substrate. 

Recommended Use 

VOK®-SL 302 is particularly suitable for solvent-free systems or systems where specific solvents are required. It is suitable for all aqueous, solventborne and solvent-free systems. 

Recommended dosage 

0.025-0.2 % 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 can be added at any stage of production, including post-adding. 

For ease of addition, it can be pre-diluted. 

Special reminder 

Unlike ordinary silicone fluids, the additive is "user safe". However, before use, a series of tests should be carried out to confirm whether the additive is foam stabilizing, in addition to evaluating its recoating and crater tendencies.