What is organic bentonite?
Organic bentonite is an inorganic mineral/organic ammonium composite. It uses bentonite as raw material and utilizes the lamellar structure of montmorillonite in bentonite and its ability to swell and disperse into colloidal grade clay in water or organic solvent. The technology is made by inserting an organic covering agent. Organic bentonite can form gel in various organic solvents, oils and liquid resins, and has good thickening, thixotropic, suspension stability, high temperature stability, lubricity, film formation, water resistance and chemical stability. It has important application value in the coating industry. It is also widely used in paint, ink, aviation, metallurgy, chemical fiber, petroleum and other industries.
English name: organic bentonite
Chinese alias: organic montmorillonite, organic clay, referred to as OMMT
Relative density: 1.7~1.8 g/cm3
Appearance: white or off-white powder
Solubility: Soluble in hydrocarbon solvent, adding a small amount of polar solvent such as methanol, ethanol, acetone, etc., can make the quaternary ammonium hydrocarbon chain between the montmorillonite layers bridge by hydrogen bond, and obtain effective solvation, so that the layer The thixotropic gel is expanded, dispersed, and formed into a card structure, preventing precipitation of the inorganic filler.
Application: Thickeners, thixotropic agents and stabilizers used as solvent-based adhesives and sealants, with a reference dosage of 5-10 parts. Add organic bentonite directly, stir for 1 hour, then add a small amount (2% ~ 3%) of polar solvent (methanol or ethanol, etc.).