Patent 7579389 was granted and assigned to Microban Products Company on August, 2009 by the United States Patent and Trademark Office.
An antimicrobial additive composition is provided which economically and efficiently imparts antimicrobial characteristics to acrylic polymers, and particularly thermoformable acrylic sheets made from such polymers. The antimicrobial composition comprises an alkyl dimethyl ammonium saccharinate, an oxathiazine, an azole, an isothiazoline, a chlorothalonil, and/or mixtures thereof, among others.