BYK-375 is a silicone-containing surface additive for solvent-borne, aqueous, and 100% coatings. It provides a slight reduction in surface tension, a slight increase in surface slip, and is particularly suitable for improving leveling. It is hydroxy-functional and offers a medium reduction in surface tension for aqueous systems.

Functions: Surface Modifier

Chemical Family: Polydimethylsiloxanes

Features: Surface Tension Reduction

Synonyms: Di(Propylene Glycol) Methyl Ether, Dipropylene Glycol Monomethyl Ether

Enhanced TDS

Identification & Functionality

Features & Benefits

Industrial Additives Features

Applications & Uses

Properties

Physical Form
Typical Properties
ValueUnitsTest Method / Conditions
Density (at 20°C)0.98g/ml-
Non-Volatile Matter (60 min, at 105°C)25%-
Flash Point78.0°C-
Hydroxyl Group Value (Solids)ca. 30mg KOH/g
SolventDi Propylene Glycol Mono Methyl Ether--
SDS Physical and Chemical Properties
ValueUnitsTest Method / Conditions
Lower Explosion Limit1.3%V
Upper Explosion Limit8.7%V
Auto Ignition Tempertauremin. 200°CDIN 51 794/ DIN prEN 14 522
Flash Point78°CPensky-Martens
Initial Boiling Point184°C-
Melting Pointmax. 0°C-
Density (at 20°C)0.975g/cm³Oscillating U-tube
Vapour Pressure (at 20°C)0.5hPaCalculated
AppearanceLiquid--
ColorLight brown--
Flammability (liquids)Sustains Combustion--
Immiscible InWater--
pH (at 20°C, Concentration: 10%)7-Universal pH-Value Indicator
Note

Due to its reactivity, the additive can be incorporated into the polymer network and therefore anchored in the coating surface. The surface properties generated by the additive are therefore present longer than with conventional, non-reactive silicones. When using the coatings in exterior areas, weathering removes the additive along with the top resin layer from the coating early on. Tests must be performed to determine whether these conditions allow the additive to be effective for a sufficiently long period of time. If the additive is used in coating systems which incorporate it via its functional groups, it is important that the coating is carefully and evenly sanded before recoating or retouching in order to facilitate sufficient adhesion.

Composition Data

Solution of a polyether-polyester-modified, hydroxy-functional polydimethylsiloxane

Regulatory & Compliance

OEM Specifications

Storage & Handling

Storage Conditions

Separation or turbidity may occur at temperatures below 10 °C. Warm to 50-60 °C until the product is clear again and mix well.