EFKA^® RM 1900 is a thickening agent in micronised form for nonaqueous coatings. It is particularly intended for use in paint manufacturing processes involving relatively high working temperatures. EFKA RM 1900 produces very strong thixotropic effects in solvent based coatings. However, the type of solvent is of decisive importance to its thixotropic behavior. The solvents should mainly consist of mineral spirits and aromatics. A combination with esters, ketones and alcohols is possible up to certain limits. This white, microfine powder is a modified hydrogenated castor oil. EFKA RM 1900 is suitable as a rheology additive for solvent based and solvent-free systems such as epoxy resin paints, plastisols, caulking compounds, putties and knifing fillers.

The advantage of EFKA RM 1900 is that it tolerates relatively high working temperatures which are particularly evident wherever the solvent consists mainly of white spirit.

EFKA RM 1900 shows optimum temperature stability in coatings based for instance on air-drying alkyd resins.

However, temperature stability is somewhat lower in systems formulated mainly with aromatic hydrocarbons, such as paints based on chlorinated rubber, polyvinyl copolymers, chlorinated polyethylene, etc.

Modified hydrogenated castor oil

Check out more rheology modifiers and additives in the BASF Additives Selection Guide

Features & Benefits

• Offers excellent sag resistance for non-aqueous formulations
• Higher temperature stability
• Tin-Free