Enhanced TDS
Identification & Functionality
- Chemical Family
- Manufactured By
- CASE Ingredients Functions
- Plastics & Elastomers Functions
- Technologies
- Product Families
Features & Benefits
- CASE Ingredients Features
- Materials Features
Applications & Uses
- Compatible Polymers & Resins
- Compatible Substrates & Surfaces
- Use Level
- 0.5 - 2% (Inorganic Fillers), 10 - 30% (Adhesives and Sealants), 10 - 30% (Pyrogenic Silica in Other Resins), 20 - 50% (Pyrogenic Silica in Vinyl Ester Resins), 5 - 20% (Organophilic Phyllosilicates Organoclays)
- Application Information
Ambient Curing Resin Systems
Special Features and Benefits
RHEOBYK-R 605 is used as a thixotropic-reinforcing additive in unsaturated polyester resins, epoxy and polyurethane systems that already contain pyrogenic silica or organophilic phyllosilicates (organoclays) as rheology additives. The additive reinforces the three-dimensional network structure of the silica or phyllosilicates through additional bridges, thereby enhancing the thixotropy. For this reason, it achieves sufficiently high anti-sagging properties with improved leveling and air release properties, even with low quantities of silica or phyllosilicates. Low quantities of RHEOBYK-R 605 (5 % based on the silica) stabilize silica in laminating resins, thereby preventing resin separation during storage.
In vinyl ester resins, RHEOBYK-R 605 activates hydrophilic, pyrogenic silica. The additive can be used in various resins, including polyols, to prevent fillers settling during storage.
In polyols, RHEOBYK-R 605 is used to stabilize molecular sieves such as zeolite.Recommended Levels
Additive quantity (as supplied) based on the
Pyrogenic silica in vinyl ester resins: 20-50%
Pyrogenic silica in other resins: 10-30%
Organophilic phyllosilicates (organoclays): 5-20%
Inorganic fillers: 0.5-2%
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 resin whilst stirring before incorporating the silica, phyllosilicates or fillers. Post-addition of the additive is also possible.Adhesives & Sealants
Special Features and Benefits
RHEOBYK-R 605 is a thixotropic-reinforcing additive for polyurethane and acrylate resins that are rendered thixotropic using pyrogenic silica or organophilic phyllosilicates (organoclays). It reinforces the hydrogen bonds of the silica and phyllosilicates, resulting in increased thixotropy. For this reason, it achieves sufficiently high anti-sagging properties with improved leveling and air release properties even with low quantities of silica or phyllosilicates.
Recommended Levels
10-30% additive (as supplied) based upon the pyrogenic silica or organophilic phyllosilicates. 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 resin before incorporating the silica/phyllosilicates whilst stirring. Post-addition is also possible.
Properties
- Physical Form
- Typical Properties
Value Units Test Method / Conditions Density (at 20°C) 0.93 g/ml - Refractive Index (at 20°C) 1.496 - - Flash Point 29.0 °C - Non-Volatile Matter (20 min, at 150°C) 52 % - Color Number max. 10 - Gardner - SDS Physical and Chemical Properties
Value Units Test Method / Conditions Upper Explosion Limit 10.70 %V Auto Ignition Tempertaure min. 200.00 °C DIN 51794 Density (at 20°C) 0.925 g/cc 4 (Oscillating U-tube, at 20°C) Lower Explosion Limit 1.00 %V Upper Explosion Limits 10.7 %V Density (at 20°C, 1013 hPa) 0.925 g/cm³ Oscillating U-tube Flash Point 29.00 °C DIN 51755, Abel-Pensky Vapour Pressure (at 20°C) max. 7 hPa Calculated Kinematic Viscosity (at 40°C) 228 mm²/s - Vapor Pressure (at 20°C) max. 7 hPa Calculated Kinematic Viscosity (at 40°C) 228 mm²/s Initial Boiling Point 106.00 °C Estimated Melting Point max. 0 °C Estimated Color Light brown - - Flammability (liquids) Sustains Combustion - - pH Value (at 20°C, Concentration: 1%) 6 Immiscible In Water - - Appearance Liquid - - pH (at 20°C, Concentration: 1%) 6 - Universal pH-Value Indicator - Composition
Solution of polyhydroxycarboxylic acid amides
Regulatory & Compliance
- Certifications & Compliance
- Chemical Inventories
Storage & Handling
- Storage Conditions
Separation or turbidity may occur. Mix well before use. Product efficiency is not influenced.