RHEOBYK 411 is a liquid rheology additive for low-polarity solvent-borne and solvent-free coating systems. It enhances anti-sagging and anti-settling properties by inducing highly thixotropic flow behavior. The product can be added post-process and is compatible with solventborne, solventless, and high solids coatings, as well as waterborne coatings. It functions as a rheology modifier and flame retardant and is part of the urea and urea derivatives chemical family.

Chemical Family: Urea & Urea Derivatives

Physical Form: Liquid

Features: Anti-Settling, Highly Thixotropic, Improves Anti-Sagging Properties, Low Sedimentation

End Uses: Solventborne Coating, Solventless & High Solids Coating, Waterborne Coating

Synonyms: 1-Methyl-2-pyrrolidone, 1-Methylazacyclopentan-2-one, 1-Methylpyrrolidinone, Methyl Pyrrolidone, N-Methyl-2-Pyrrolidone, N-Methyl-Alpha-Pyrrolidinone, N-Methyl-Alpha-Pyrrolidone, N-Methyl-Gamma-Butyrolactam, N-Methyl-Pyrrolidone, N-Methylpyrrolidone

Enhanced TDS

Identification & Functionality

Chemical Family
Chemical Name
Manufactured By
CASE Ingredients Functions
Plastics & Elastomers Functions
Technologies
Product Families

Features & Benefits

Applications & Uses

Application Area
Coating End Applications
Use Level
0.5 - 2% (Coatings Industry - to Prevent Sagging), 0.2 - 1% (Coatings Industry - to Prevent Settling)
Coatings Industry Application

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 increasing the anti- sagging properties without impairing leveling. As a result of associative interaction of RHEOBYK-411 with the used binder, the rheological effect is also significantly dependent upon the type and quantity of the binder.

Recommended Use
The additive is recommended for low-polarity systems. RHEOBYK-410 is better suited for medium-polarity systems. We recommend RHEOBYK-420 for high-polarity and aqueous systems.

Recommended Levels
0.2-1% additive (as supplied) based on the total formulation to prevent settling. 0.5-2% additive (as supplied) based on the total formulation to prevent sagging.
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 should be added to the coating whilst stirring using moderate shear forces to ensure a rapid, homogeneous distribution. It is not necessary to specifically control the temperature. The additive can be added to the millbase and is also suitable for adjusting the viscosity afterwards by incorporating it as a post-additive.

Special Note
If used with driers (siccatives), discoloration may occur due to the formation of metal complexes. The rheological effectiveness should then be tested.

Properties

Physical Form
Typical Properties
ValueUnitsTest Method / Conditions
Flash Point91°C-
SolventsN-Methylpyrrolidon--
Density (at 20°C)1.05g/ml-
Active Substance25%-
SDS Physical and Chemical Properties
ValueUnitsTest Method / Conditions
Lower Explosion Limit1.3%V
Upper Explosion Limit9.5%V
Auto Ignition Tempertauremin. 200°CM0062, Analytics Wesel
Flash Point91°CPensky-Martens
Initial Boiling Point203°CDerived
Melting Pointmax. 0°CDerived
Density (at 20°C)1.05g/cm³Oscillating U-tube
Vapour Pressure (at 20°C)max. 0.5000000hPaDerived
AppearanceLiquid--
ColorLight yellow--
Flammability (liquids)Sustains Combustion--
Immiscible InWater--
pH (at 20°C, Concentration: 1%)5-Universal pH-Value Indicator
Composition Data

Solution of a modified urea

Regulatory & Compliance

OEM Specifications

Storage & Handling

Storage and Transportation

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.