- Principal:Arkema Rheology and Specialty Additives Group
- Functions:Rheology Modifier, Rheology Modifier
- Chemical Family:Castor Oil Derivatives
- End Uses:Electronics
- Labeling Claims:Bio-based, Heavy Metal-free, No Added Alkylphenol Ethoxylates (APEO), Solvent-free
- Features:Anti-Settling, Brushability, Easy Handling, Good Leveling, High Gloss, High Shear Thinning, Highly Thixotropic, Improved Edge Coverage, Low Shear Contribution, Rollability, Syneresis Resistance, Transparency, Viscosity Stability
- Physical Form:Powder
CRAYVALLAC® SF is a proprietary amide-modified hydrogenated castor oil rheology modifier with an enhanced tolerance to temperature and solvent strength suitable for a variety of different solvent-based systems e.g. aromatic hydrocarbons and aromatic hydrocarbon/alcohol blends. Compared to other hydrogenated castor oil based rheology modifiers, CRAYVALLAC® SF is more tolerant to strong solvents and high processing temperatures due to the presence of its unique performance enhancing amide. The activation process constitutes the conversion of the CRAYVALLAC® SF particles to an interacting network of fibre-like particles. It is this network that gives rise to the final coating’s shear thinning rheology. This shear thinning characteristic provides a very high viscosity under the low shear rates associated with sedimentation, and a low viscosity at the much higher application shear rates. The net result is excellent control of sedimentation combined with ease of application.
