Polyhexamethylene biguanide and surfactant composition and method for preventing waterline residue
AssigneeZeneca Limited
InventorsMichael J. Unhoch, George D. Stratton
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Abstract
A water treatment method for controlling the growth of algae, fungi and bacteria and the formation of a waterline residue in recreational and industrial water supplies containing turbulent water utilizes a composition containing a polyhexamethylene biguanide compound and a surfactant. The water treatment method and composition containing the biguanide compound and surfactant are particularly useful for treating recreational water supplies like spas and swimming pools containing turbulent water, such as aerated water.
Claims33
A method for controlling the growth of algae, fungi and bacteria in water susceptible to formation of a waterline residue which comprises introducing into a turbulent water supply an antimicrobial-effective amount of a polyhexamethylene biguanide compound and a water-soluble or water-dispersible surfactant said surfactant being introduced in an amount sufficient to control formation of a residue at the waterline of the turbulent water supply.
A method for controlling the growth of algae, fungi and bacteria in water susceptible to formation of a waterline residue which comprises introducing into a turbulent water supply an antimicrobial-effective amount of a polyhexamethylene biguanide compound and a water-soluble or water-dispersible surfactant selected from the group consisting of di(hydrogenated tallow alkyl)-dimethyl quaternary ammonium chloride, tallow alkyl benzyl dimethyl quaternary ammonium chloride and hydrogenated tallow alkyl benzyl dimethyl quaternary ammonium chloride, said surfactant being introduced in an amount sufficient to control formation of a residue at the waterline of the turbulent water supply.
A composition for controlling the growth of algae, fungi and bacteria and the formation of a waterline residue in a turbulent water supply comprising an aqueous formulation of
- a polyhexamethylene biguanide compound and
- a water-soluble or water-dispersible suffactant. said surfactant being selected from the group consisting of alkoxylated alkanolamides. polyoxypropylene-polyoxypropylene block copolymers with a hydroplile-lipophile balance below about 12, C.sub.12 -C.sub.18 ethoxylated propoxylated alcohols. C.sub.16 -C.sub.18 fatty alcohol polyglyc91 ethers, alkylene oxide addition products. methyl bis(soya alkyl amidoethyl) 2-hydroxyethyl quaternary ammonium methyl sulfate and methyl bis(tallow alkyl amidoethyl) 2-hydroxyethyl quaternary ammonium mthyl sulfate,
- wherein the concentration of biguanide compound is from about 2 wt % to 30 wt % and the surfactant concentration is from about 0.01 wt % to about 25 wt %.
A composition for controlling the growth of algae, fungi and bacteria and the formation of a waterline residue in a turbulent water supply comprising
- a polyhexamethylene biguanide compound and
- a water-soluble or water-dispersible surfactant selected from the group consisting of di(hydrogenated tallow alkyl)-dimethyl quaternary ammonium chloride, tallow alkyl benzyl dimethyl quaternary ammonium chloride and hydrogenated tallow alkyl benzyl dimethyl quaternary ammonium chloride.
Dependencies are inferred from the claim text.