BYK 1788 Non-silicone defoamer
BYK-1788
Non-silicone defoamer for solvent-borne, high-solids and solvent-free systems with zero VOC. Especially for 100% solids
UV curing system. This defoamer is a widely compatible defoamer and is also recommended for clearcoat systems and thermosets.
chemical components
Surface-active substance mixture. Solvent Free Zero VOC (< 1500 ppm) Silicone Free
typical materialized data
The data given on this data sheet are only typical values, not the technical specifications of the product.
| Density (20 °C) | 0.95 g/ml |
| Nonvolatile matter (10 min, 150 °C) | > 98 % |
storage and transportation
Keep container tightly closed after use.
Application field
liquid paint
Features and Benefits: BYK-1788 is a zero-emission polymeric defoamer especially suitable for 100% solids UV curing systems, but also for high solids
and solvent-free polyurethane or unsaturated polyester systems. The additive does not affect the surface properties of the coating such as gloss or clarity and is therefore especially recommended for clearcoats
system. BYK-1788 is an efficient defoamer with broad compatibility. It can be used in grinding process and post addition process. The additive is a
A 100% solids, zero VOC defoamer is therefore recommended for 100% UV cured wood and furniture coatings.
Recommended use
| Wood and Furniture Coatings | Specially Recommended |
| General Industrial Coatings | Recommended |
Recommended dosage
0.3-0.5 % Auxiliary dosage (as supplied) is based on the total formulation.
The above recommended dosage is for reference, and the optimum dosage needs to be determined through a series of tests.
Joining method and processing guidance
BYK-1788 can be added either during grinding or post-addition. If post addition is required, a sufficiently high shear force is required to ensure that the additive is uniformly dispersed.
leather topcoat
Features and Benefits: BYK-1788 is a zero emission polymeric defoamer especially suitable for high solids and solvent free polyurethane systems.
Recommended use
| Leather Coating | Recommended |
Recommended dosage
0.3-0.5 % Auxiliary dosage (as supplied) is based on the total formulation.
The above recommended dosage is for reference, and the optimum dosage needs to be determined through a series of tests.
Joining method and processing guidance
BYK-1788 can be added during grinding or post-addition. If post-added, a sufficiently high shear force is required to ensure that the additive is uniformly dispersed.
Thermosetting Plastics
Features and Benefits: Highest efficiency in defoaming in almost all epoxy resin systems such as cast resins, vacuum infusion or wound systems. The additive also exhibits excellent defoaming performance in acrylate and unsaturated polyester resins, and provides the best defoaming efficiency in styrene-free unsaturated polyester resins. The use of BYK-1788 in some resins can improve surface quality and reduce venting time for composites.
Recommended use
| Epoxy Resin | Specially Recommended |
| Unsaturated polyester resin | Specially Recommended |
| Acrylic | Specially Recommended |
| Polyurethane tree | recommended |
Recommended dosage
0.1-0.75 % Auxiliary dosage (as supplied) is based on the total formulation.
The above recommended dosage is for reference, and the optimum dosage needs to be determined through a series of tests.
Joining method and processing guidance
Stir into resin before adding other ingredients.
special reminder
In two-component epoxy systems, BYK-1788 can be added to both the resin component and the amine curing agent component.
