Omya - BYK-1797

BYK-1797 is a highly effective, silicone-containing defoamer and is particularly suited to radiation-curable screen printing inks. The defoaming effect is achieved even at a low dosage, higher additive quantities improve leveling and substrate wetting.
At adequate shear, the additive can also be used in liquid radiation-curable or aqueous printing inks.

Incorporation and Processing Instructions

To ensure the full effect, the defoamer should be added as early as the grinding stage or at the start of the manufacturing process.
If post-adding, ensure a sufficiently high shear force in order to distribute the additive well and to prevent cratering.

Thermosets

Special Features and Benefits

Depending on the dosage, BYK-1797 is a highly effective, silicone-containing air release agent, leveling agent or process additive/compatibilizer.
The additive is particularly suitable for polyurethane systems.
The air-release effect is achieved even at a low dosage, higher additive quantities improve leveling and substrate wetting.
Increase the dosage further and BYK-1797 will display emulsifying properties.
Release properties could be observed in isolated systems.

Incorporation and Processing Instructions

To ensure the full effect, the additive should be added at the start of the manufacturing process.
If post-adding, ensure a sufficiently high shear force in order to distribute the additive well.
When using as a process additive/compatibilizer, the additive should be added to the polyol before adding the incompatible components.

Care Products and Polishes

Special Features and Benefits

BYK-1797 is a process additive that contains silicone. Its hydrophobic effect as a Pickering emulsion achieves a high gloss effect on rubber and plastic surfaces.
On glass substrates, BYK-1797 acts as an anti-fogging additive without disruptive light reflections.

Incorporation and Processing Instructions

BYK-1797 must be emulsified together with LAPONITE-RD using a high-speed stirrer (e.g. Ultra-Turrax,
Dispermat AS or Dispermat with SR technology) at 20,000 rpm in water.
The aqueous emulsion is then ready for use as a care product.

Physical Form

Liquid

Typical Properties

SDS Physical and Chemical Properties

Composition Data

Polyether-modified foam-destroying polysiloxanes