German technical background VOK-1770 Defoamer Prevent the generation of microbubbles, suitable for paints and varnishes replaces BYK-1770

German technical background VOK ?- DF 1770 silicone defoamer

Used for waterborne architectural coatings. It is particularly suitable for thick coating systems using airless/mixed air spraying. Solvent free.

Product Information

Chemical composition

Polyether modified polydimethylsiloxane

Typical Physicochemical Data

The data given in this data page are only typical values, not technical indicators of the product.

Density (20 ° C): 1.01 g/ml

Refractive index (20 ° C): 1.4395

Active substance: 100%

Application field

Paint and printing ink

Product features and advantages

VOK ?- DF 1770 is particularly effective in acrylate and polyurethane/acrylate waterborne thick coating systems with airless/air mixed construction. It prevents the generation of microbubbles and is suitable for paints and varnishes. In the highlight system, it has no adverse effect on transparency and gloss. VOK ?- DF 1770 contains no solvent.

Recommended use

Architectural coatings and high build systems (joinery)

Industrial coatings

Wood and furniture coatings

Recommended dosage

0.3-1% auxiliary dosage (supply form) is based on the general formula.

The above recommended dosage is for reference, and the appropriate dosage shall be determined through a series of tests.

Adding method and processing guidance

In the paint, the additive is best added to the abrasive. When used in the process of varnish or paint mixing, the shear force must be high enough to ensure good addition, so as to prevent shrinkage.

Special precautions

In order to improve leveling and surface performance, it is recommended to contact VOK ?- 348 and AQUACER 539 are used together to obtain good substrate wettability and good adhesion resistance.