BYK-394 is a polyacrylate-based surface additive for solvent-borne coil coatings and wood and furniture coatings. It improves leveling, enhances tape release, and is OH-functional.

Chemical Family: Polyacrylates

Labeling Claims: Solvent-free

Compatible Polymers & Resins: Acrylate Epoxy, Acrylic-Melamine, Alkyd-Melamine, Polyacrylates, Polyester - Melamine, Polyurethanes (PU)

Features: Anti-Cratering , Good Leveling, Good Tape Release, Heat Stable

End Uses: 2K (2 component) Coating, Coil Coating, Solventborne Coating, Wood Coating

Enhanced TDS

Identification & Functionality

Features & Benefits

Applications & Uses

Markets
Applications
Application Area
Compatible Polymers & Resins
Compatible Substrates & Surfaces
Coating End Applications
Use Level
0.2 - 3% (Coatings Industry)
Application Information

Coatings Industry
Special Features and Benefits 

The additive orients itself to the coating surface and is fixed in the surface via its reactive groups by reacting with the polymer matrix. BYK-394 contains primary OH groups which react with binders, such as 2K polyurethane, alkyd/melamine, polyester/melamine, acrylate/melamine and acrylate/epoxy combinations in solvent-borne systems. The non-polar groups of the BYK-394 result in outstanding tape release. The additive improves leveling and gloss. It produces a long wave effect and prevents cratering. BYK-394 has no impact on surface tension and is thermally stable.

Recommended Levels
0.2-3% additive (as supplied) based upon total formulation.
The above recommended levels can be used for orientation. Optimal levels are determined through a series of laboratory tests.
Incorporation and Processing Instructions
The additive can be incorporated during any stage of the production process, including post-addition.

Properties

Physical Form
Typical Properties
ValueUnitsTest Method / Conditions
Density (at 20°C)1.02g/ml-
Hydroxyl Group Value23mg KOH/g-
Non-Volatile Matter (10 min, at 150°C)80%-
Flash Point88.0°C-
SolventDipropyleneglycolmonomethylether--
SDS Physical and Chemical Properties
ValueUnitsTest Method / Conditions
Auto Ignition Tempertauremin. 200°CDIN 51794
Flash Point88°CPensky-Martens
Initial Boiling Point184°CDerived
Density (at 20°C)1.017g/cm³Oscillating U-tube
Vapour Pressure (at 20°C)0.4hPaDerived
AppearanceLiquid--
ColorColorless
Flammability (liquids)Sustains Combustion--
Immiscible InWater--
OdorEster-like--
pH (at 20°C, Concentration: 1%)6-Universal pH-Value Indicator
Note

When using this additive, the surface must be sanded thoroughly prior to recoating to ensure the adhesion of the new coating layer.

Composition Data

Solution of a polyacrylate copolymer

Regulatory & Compliance

OEM Specifications