Ammonium Biocides
“Silicon-containing quaternary ammonium salts having the following Formula I are recognized antimicrobial agents: R3N+R0nSiX4nY-(I) wherein each R and each R0 is independently, a non-hydrolysable organic group; each X is, independently, a hydrolysable group; n is an integer of 1 to 3; and Y is a suitable anionic moiety to form the salt of the compound of Formula I.”
“The use of such silicon-containing quaternary ammonium salts in solvents adsorbed by a polymeric substrate surface where the quaternary salt is subsequently polymerized such that an interpenetrating network is formed within the interstices only of the polymeric substrate surface has been described in U.S. Pat. Nos. 6,146,688 and 6,572,926”
“Despite knowledge of the common usage of silicon-containing quaternary ammonium salts for imparting antimicrobial properties to surfaces, a method was not known for protecting surfaces through the use of antimicrobial agents polymerized throughout the entire substrate including throughout the bulk material used to make the substrate or throughout the thin layer film or laminate. The benefit of such a process and the products produced thereby is that antimicrobial protection is still available even if the surface is abraded or removed during the manufacture or use of a substrate or thin layer film or laminate.”
Recent US Patents
12/28/2010
7,858,141
Method of creating a sustained silicon-containing quaternary ammonium antimicrobial agent within a polymeric material
Getman et al of Biosafe, Pennsylvania, formed an antimicrobial by mixing an antimicrobial polymerizable silicon-containing quaternary ammonium salt solution with a second monomer, a polymer or a coating. This method can be used to make formed plastic products, thin layer films and other products having sustained antimicrobial properties. (RDC 7/7/2011)