The sulfonamide plasticizers and resins are compatible with, and impart many desirable characteristics, such as gloss, toughness, and adhesion, to a w ide variety of resins, including cellulose nitrate, cellulose acetate, ethylcellulose, nylon, and zein. Physical tests, including tensile strength, elongation, water permeability, and flexibility, were conducted on cellulose nitrate and cellulose acetate films and sheets plasticized with the sulfonamides and using dibutyl phthalate, camphor and dimethyl phthalate, and diethyl phthalate and triacetin as the respective control plasticizers. Tests were also conducted on injection-molded specimens. In cellulose acetate, sulfonamide plasticizers impart greater flexibility and lower water permeability than the control plasticizers. The sulfonamide resins yield films of high tensile strength and extremely low water permeability. In cellulose nitrate the sulfonamides give films of greater tensile strength, elongation, and flexibility than the controls. The sulfonamide resins decrease water permeability, increase solvent resistance, and sharpen the melting point. Some applications of these plasticizers and resins in the paint, varnish, and plastics industry are discussed. EVER since 1868, when Hyatt successfully plasticized cellulose nitrate with camphor to form celluloid, there has been a desire to utilize other plasticizing materials. Since 1882, when Stevens patented the use of amyl acetate as a solvent for pyroxylin to form a lacquer film, there has been the desire to improve these lacquers and create new types by using various resins and Cni.OROSUi_FONIC ACID TOLUENE Cl SO2 OH CH3
