- Chemical Family:Castor Oil Derivatives
- Functions:Rheology Modifier
- End Uses:Top Coat
- Compatible Polymers & Resins:Alkyds, Polyurethanes (PU), Chlorinated Compounds, Epoxies (EP), Polyesters, Acrylics, Polyvinyl Chloride (PVC)
- Physical Form:Solid
- Synonyms:Castorwax, Hardened castor oils, Hydrogenated castor oil
Efka® RM 1920 serves as a rheology modifier for solvent-based systems. It is a particularly finely ground additive used to impart a thixotropic effect to paints, printing inks, and other coatings. This additive effectively prevents sagging of thick films on vertical surfaces while generally improving working and flow properties. It substantially reduces pigment settling. The chemical nature of Efka® RM 1920 involves hydrogenated castor oil.