Patent attributes
The invention pertains to a cellulosic material provided with a coating comprising an oxidized carboxylated starch having a weight-average molecular weight of 0.3−10×106 Da and a water-soluble starch extender present in a quantity of 0 to 25 wt. % based on the coating dry weight, selected from a crosslinked cationic polyalkylene amine and a zirconium carbonate, as well as to use thereof in improving the oil and grease resistance of paper. The invention furthermore pertains to a method to improve the oil and grease resistance of a cellulosic material, comprising providing a cellulosic material, coating said material on at least one side with a homogenous aqueous composition comprising an oxidized carboxylated starch having a weight-average molecular weight of 0.3−10×106 Da and 0-3 wt. % of a starch extender, selected from a crosslinked cationic polyalkylene amine and a zirconium carbonate, and drying the cellulosic material.
