Patent ID: 7674473

Claim:
An anti-microbial composition consisting essentially of: (i) at least one anti-microbial agent, wherein at least one of the anti-microbial agents is an anti-microbial agent having a high surface tension of from 20 to 35 mN/m, and is selected from the group consisting of (a) a quarternary ammonium compound having the general formula R 1 R 2 R 3 R 4 N + X − , in which one or two of the R groups are alkyl substituted by aryl or interrupted by aryl or oxygen and the other R groups are the same or different and are C 1 to C 4 alkyl groups, (b) a dialkyldimethylammonium compound wherein the two non-methyl alkyl groups are selected from alkyl groups comprising from 8 to 12 carbon atoms, and (c) a benzalknoium halide or an aryl ring substituted benzalkonium halide, (ii) a compound having a low surface tension of from 8 to 14 mN/m, and selected from the group consisting of silanes, soya lecithins, polydimethylsiloxanes, and polydimethylhydroxysiloxanes, and (iii) at least one polar solvent, wherein in use the anti-microbial composition acts substantially to reduce or control the formation of microbial colonies on or at a surface to which the composition is applied.