ANTIMICROBIAL HAND WASH FORMULATIONS
An antimicrobial hand wash comprises an active ingredient and an amphoteric surfactant that is a derivative compound of a fatty amine with a nitrogen atom bound to at least one, but not greater than two, propionic acids. These specific amphoteric surfactants have unexpectedly been found to be compatible with active ingredients such that the antimicrobial efficacy is maintained, while foam quality is improved when the hand wash is dispensed as foam. Other antimicrobial hand washes include polyethylene glycol or polypropylene glycol derivatives that dissolve at least a portion of the active ingredient, thus reducing the amount of solids in the formulation, and making a cold manufacturing process possible.
1 . A hand wash comprising:
a phenol-based active ingredient selected from 2,3,4′-trichloro-2′-hydroxydiphenylether, 2,2′-dihydroxy-5,5′-dibromodiphenyl ether, p-chloro-m-xylenol, ortho-phenylphenol, and mixtures thereof;
an amphoteric surfactant selected from the group consisting of disodium capryloamphodiacetate and derivative compounds of a fatty amine with a nitrogen atom bound to at least one, but not greater than two, propionic acids; and
a quaternary ammonium compound selected from the group consisting of polyethylene glycol (PEG) derivatives of a quaternary ammonium salt of a fatty amine, polypropylene glycol (PPG) derivatives of a quaternary ammonium salt of a fatty amine, and mixtures thereof, wherein said quaternary ammonium compound dissolves at least a portion of said phenol-based active ingredient.
2 . The hand wash of claim 1 , wherein the amphoteric surfactant is selected from the group consisting of disodium capryloamphodiacetate, cocaminopropionic acid, lauraminopropionic acid, cocoamphodipropionic acid, lauriminodipropionic acid, and lauramphodipropionic acid, and mixtures thereof.
3 . The hand wash of claim 1 , wherein quaternary ammonium compound is a PEG derivative selected from the group consisting of PEG-5 oleammonium methosulfate, PEG-2 oleammonium chloride, PEG-15 oleammonium chloride and mixtures thereof.
4 . The hand wash of claim 1 , wherein the hand wash is comprised of from 0.01 to 10 weight % of said phenol-based active ingredient.
5 . The hand wash of claim 4 wherein the hand wash is comprised of from 0.05 to 25 weight % of said amphoteric surfactant.
6 . The hand wash of claim 5 wherein the hand wash is comprised of from 0.01 to 10 weight % of said quaternary ammonium compound.
7 . An antimicrobial hand wash comprising:
a phenol-based active ingredient; and
quaternary ammonium compound selected from the group consisting of PEG-5 oleammonium methosulfate, PEG-2 oleammonium chloride, PEG-15 oleammonium chloride and mixtures thereof.
8 . The hand wash of claim 7 wherein the phenol-based active ingredient is selected from 2,3,4′-trichloro-2′-hydroxydiphenylether, 2,2′-dihydroxy-5,5′-dibromodiphenyl ether, p-chloro-m-xylenol, ortho-phenylphenol, and mixtures thereof.
9 . A method for producing an antimicrobial hand wash comprising the steps of:
creating an active ingredient premix comprised of a phenol-based active ingredient and a quaternary ammonium compound selected from polyethylene glycol (PEG) derivatives of a quaternary ammonium salt of a fatty amine, polypropylene glycol (PPG) derivatives of a quaternary ammonium salt of a fatty amine, and mixture thereof, wherein the quaternary ammonium compound dissolves at least a portion of the phenol-based active ingredient;
creating a masterbatch mix of water and a supplemental surfactant package; and
combining the active ingredient premix and the masterbatch mix.