RHEOBYK-D 420 is a liquid rheology additive for aqueous systems, designed to generate thixotropic flow behavior.

CAS Number: 7447-41-8

Chemical Family: Castor Oil Derivatives, Urea & Urea Derivatives

Enhanced TDS

Identification & Functionality

Features & Benefits

Applications & Uses

Markets
Applications
Application Area
Coating End Applications
Home Care Applications
Use Level
0.3 - 1.5% (Coatings Industry - Prevent Settling), 0.3 - 3% (Coatings Industry - Prevent Sagging)
Application Information

Coatings Industry
Special Features and Benefits

After being stirred into the coating system, the additive generates a three-dimensional network structure. The resulting thixotropic flow behavior is highly suited for preventing sedimentation and syneresis and increasing the anti-sagging properties without impairing leveling. The additive is liquid and therefore easy to handle. It is not necessary to specifically adjust the pH value or control the temperature during incorporation.
Recommended Use
RHEOBYK-D 420 is preferably used as an anti-settling additive to produce aqueous pigment, filler and matting agent concentrates. The additive's excellent shear thinning effect is advantageous for dosing such concentrates because of their low viscosity. In addition, it is suitable for controlling the thixotropic flow behavior and for optimizing the anti-sagging properties and leveling.
Recommended Levels
0.3-1.5% additive (as supplied) based on the total formulation to prevent settling.
0.3-3 % to prevent sagging.
The above recommended levels can be used for orientation. Optimal levels are determined through a series of laboratory tests.

Properties

Physical Form
Typical Properties
ValueUnitsTest Method / Conditions
Density (at 20°C)1.15g/ml-
Active Substance45%-
Flash Point95.0°C-
SolventDimethylsulfoxide--
SDS Physical and Chemical Properties
ValueUnitsTest Method / Conditions
Auto Ignition Tempertauremin. 200°CM0062, Analytics Wesel
Flash Pointca. 95°CPensky-Martens
Initial Boiling Pointmin. 200°CDerived
Melting Pointmax. 0°CDerived
Density (at 20°C, 1013 hPa)ca. 1.15g/cm³Oscillating U-tube
Vapour Pressuremax. 1hPaDerived
Kinematic Viscosity (at 20°C)96.52mm²/s-
Dynamic Viscosity (at 20°C)ca. 111mPa.sP/K 20°C
AppearanceLiquid--
ColorLight yellow--
Flammability (liquids)Sustains Combustion--
Immiscible InWater--
pH (at 20°C, Concentration: 1%)7-Universal pH-Value Indicator
Composition

Solution of a modified urea

Regulatory & Compliance

OEM Specifications

Storage & Handling

Storage Conditions

Moisture sensitive. Store dry. Slight turbidity of the material that occurs during storage has no influence on the rheological effectiveness. The specified storage stability upon dispatch applies when the product is handled correctly and stored in unopened original containers. Crystallization possible at temperatures < 10 °C. Warm the product to > 20 °C before use.