BYK-331 is a silicone surface additive for solvent-borne, solvent-free, and aqueous coatings and printing inks. It provides a medium reduction in surface tension and a medium increase in surface slip.

Functions: Anti-Blocking Agent, Slip Agent, Surface Modifier, Surface Tension Modifier

Chemical Family: Polydimethylsiloxanes

End Uses: 2K (2 component) Coating, Printing Ink, Solventborne Coating, Varnishes, Waterborne Coating, Wood Coating

Compatible Polymers & Resins: Polyurethanes (PU)

Labeling Claims: Solvent-free

Features: Good Leveling, Improved Slip, Improved Substrate Wetting, Surface Tension Reduction

Enhanced TDS

Identification & Functionality

Chemical Family
Manufactured By
CASE Ingredients Functions
Industrial Additives Functions
Technologies
Product Families

Features & Benefits

Applications & Uses

Markets
Applications
Application Area
Compatible Polymers & Resins
Compatible Substrates & Surfaces
Coating End Applications
Ink & Toner End Applications
Use Level
0.025 - 0.2% (Coatings and Printing Inks)
Application Information

Coatings and Printing Inks
Special Features and Benefits

The additive reduces the surface tension in the systems to a medium level. It increases slip and improves leveling and gloss. Silicone additives prevent the formation of Bénard cells. BYK-331 also improves substrate wetting and provides anti-blocking properties.
Recommended Use
BYK-331 can be used in all aqueous, solvent-borne, and solvent-free systems and is especially recommended for automotive coatings, architectural coatings, wood coatings as well as printing inks and overprint varnishes. In two-pack polyurethane systems, it can also be added to the isocyanate hardener.
Recommended Levels
0.025-0.2% 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. Thinning before incorporation may make dosing easier.
Special Note
Unlike so-called silicone oils, this additive is very user-friendly. However, before use, one should determine in test series whether foam is stabilized in certain systems and check the recoatability and crater development.

Properties

Physical Form
Typical Properties
ValueUnitsTest Method / Conditions
Density (at 20°C)1.04g/ml-
SDS Physical and Chemical Properties
ValueUnitsTest Method / Conditions
Ignition Temperaturemin. 200°CDIN 51 794/ DIN prEN 14 522
Density (at 20°C)1.035g/cc4 (Oscillating U-tube, at 20°C)
Flash Pointmin.100°C49 (Pensky-Martens)
Vapor Pressuremax. 0.01kPaDerived
Initial Boiling Pointmin. 200°CDerived
Melting Pointmax. 0°CDerived
Miscible inWater--
pH Value (at 20°C, 10% Concentration)7--
ColorLight yellow--
AppearanceLiquid--
Composition

Polyether-modified polydimethylsiloxane

Regulatory & Compliance