Sartomer Company, Exton, PA, has expanded its Asian market leadership by appointing Steve Edwards business and marketing development manager for the Asia-Pacific region.      Mr. Edwards assumes the business and marketing responsibilities of Frank Zeglin, who now works exclusively within Sartomer’s Asian functional additives area.        As a member of the Asia business team, Mr. Edwards is responsible for the coordination of business development and marketing activities for Sartomer’s phot...