Enhanced TDS
Identification & Functionality
- Chemical Family
- Manufactured By
- CASE Ingredients Functions
- Technologies
- Product Families
Features & Benefits
- CASE Ingredients Features
Applications & Uses
- Compatible Polymers & Resins
- Coating End Applications
- Use Level
- 20% - 40%
- Application Information
Coatings Industry
Special Features and Benefits
- RHEOBYK-405 acts as a wetting and dispersing additive and makes it easy to incorporate pyrogenic fumed silica in the coating. It increases or stabilizes the thixotropic behavior. The improved rheological effect is particularly noticeable in clear coatings as the incorporation of the fumed silica does not usually occur at the same high shear forces as for pigmented systems.
- The additive reduces or prevents the separation of pyrogenic fumed silica in the coating.
- RHEOBYK-405 is specifically designed for solvent-borne coating systems based on polyester, acrylate, and alkyd binders that contain pyrogenic fumed silica. The fumed silica should be at least partially hydrophilic.
- Thixotropic binders gain increased thixotropy when additionally dosed with RHEOBYK-405.
- Recommended Levels
- 20-40% additive (as supplied) based upon the pyrogenic fumed silica.
- The above recommended levels can be used for orientation. Optimal levels are determined through a series of laboratory tests.
Properties
- Color (Properties)
- Physical Form
- Typical Properties
Value Units Test Method / Conditions Flash Point 29 °C - Solvents Xylene/alkylbenzenes/isobutanol(5/4/1) - - Non Volatile Matter 52 % - Density 0.93 g/ml - - SDS Physical and Chemical Properties
Value Units Test Method / Conditions Kinematic Viscosity (at 40°C) 228 mm²/s - Ignition Temperature min. 200.00 °C DIN 51794 Density (at 20°C) 0.925 g/cc 4 (Oscillating U-tube, at 20°C) Lower Explosion Limit 1 %V - Explosion Limits (Upper) 10.7 %V - Immiscible in Water - - Flash Point 29 °C 48 (Abel-Pensky) Vapor Pressure (at 20°C) max. 7 hPa - Initial Boiling Point 106 °C Estimated Melting Point max. 0 °C Estimated pH Value (at 20°C, 1% Concentration) 6 - Universal pH Value Indicator Odor Not significant - - Appearance Light brown liquid - - - Compatibility
Solution of polyhydroxycarboxylic acid amides
- Incorporation
RHEOBYK-405 can be added to the formulation before or after dispersion of the pyrogenic fumed silicas whilst stirring.
Storage & Handling
- Storage and Transportation
Separation or turbidity may occur. Warm to 20-30 °C and mix well. Product efficiency is not affected.