Alcogum L-289 Acrylate based emulsion copolymer National Starch and Chemical-Alco Chemical South and Central America Rheology Modifier/ Thickener >> Associative >> Hydrophobically modified alkali-soluble emulsions (HASE) Other industry >> Paper coatings ALCOGUM® L-289 is an acrylate-based emulsion copolymer supplied at 25% active solids in water. The process employed in the manufacture of ALCOGUM L-289 allows fine control of the polymer structure and molecular weight to meet the specific rheology and water retention requirements of the paper and paperboard coating industries. Control of these properties can have a positive effect on runnability and surface properties. ALCOGUM L-289 was developed for use in lightweight coating formulations that require additional water retention and reduced blade pressure for improved coater runnability. It possesses efficient viscosity build at most coating solids, provides excellent water retention, liquid for ease of handling and metering, shear thinning flow characteristics. An acrylate-based emulsion copolymer. Provides excellent water retention and shear thinning flow characteristics. Used in paper and paperboard coating industries.