Antibacterial compositions comprising quaternary ammonium germicides and alkamine oxides having reduced irritation potential
View Patent ↗Antibacterial compositions having antibacterial effectiveness and reduced eye irritation potential are disclosed. The antibacterial compositions contain a quaternary ammonium compound, an alkamine oxide, a nonionic compound, optional adjuvant materials known in the art, and water. The eye irritation is decreased by decreasing the amount, by weight, of alkamine oxide present in the composition and alternatively, or in combination therewith, increasing the ratio of nonionic material to alkamine oxide present in the composition.
1. A method of washing the skin of a human, comprising:
washing the skin with an antibacterial composition, which comprises
a quaternary ammonium compound present in the amount of from about 1 to about 5 percent by weight of the antibacterial composition,
one or more alkamine oxides present in the amount of from about 0.1 to about 10 percent by weight of the antibacterial composition,
one or more nonionic materials comprising a block copolymer of ethylene oxide and propylene oxide,
one or more liquid carriers, and
optionally one or more ingredients selected from a group comprising:
polymeric thickeners of the nonionic or cationic class, dyes, perfumes, builders, pH adjusters, solvents, and mixtures thereof,
wherein the antibacterial composition is substantially free of anionic surfactants and has a relative weight ratio of the nonionic material to the one or more alkamine oxides of from about 5:1 to about 8.5:1; and
rinsing the antibacterial composition from the skin.
2. The method according to claim 1 , wherein said quaternary ammonium compound is selected from the group consisting of: benzethonium chloride, benzalkonium chloride, alkyl dimethylbenzyl ammonium chloride, cetyl trimethyl ammonium chloride.
3. The method according to claim 1 , wherein said one or more alkamine oxides are present in the amount of from about 0.3 to about 1.5 percent by weight of the antibacterial composition.
4. The method according to claim 1 , wherein said alkamine oxide is lauramine oxide.
5. The method according to claim 1 , wherein said nonionic material further comprises an alkylpolyglucoside surfactant.
6. The method according to claim 1 , wherein said nonionic material is Pluronic F108 and further comprises decyl polyglucose.
7. The method according to claim 1 , wherein the antibacterial composition has a pH between about 6.5 and 8.
8. The method according to claim 1 , wherein the relative weight ratio of the nonionic material to the alkamine oxide yields a composition with a Permeability Value in a BCOP assay of less than about 1.2.
9. The method according to claim 1 , wherein said composition is free of anionic and zwitterionic surfactants.