Stable hydrogen peroxide dental gel containing fumed silicas
AssigneeColgate-Palmolive Company
InventorsShirley M. Ng, Denise-Marie DiTomasso
Life of this patent
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Abstract
A stable aqueous hydrogen peroxide gel dentifrice for oral anti-gingivitis application having an acid pH of about 3-6 comprising a combination of hydrophilic and hydrophobic fumed silica gelling agent, hydrogen peroxide, about 20-40% by weight of a polyethylene glycol humectant, flavor, sweetening agent, sodium benzoate, and a nonionic surfactant as the essential ingredients, prepared by a process which comprises controlling the order of addition of the essential ingredients. Distilled (deionized) water is preferred in the formulation to prevent minimal contamination.
Claims7
A cosmetic and chemically stable aqueous hydrogen peroxide dental gel having a pH between about 3-6, comprising hydrogen peroxide as the sole chemically active agent in an amount of 1.5-3.5% by weight, a combination of hydrophilic and hydrophobic fumed silica gelling agent, about 20-40% by weight of a polyethylene glycol humectant, a nonionic surfactant, a sweetener, sodium benzoate and a flavor prepared by homogenizing the fumed silicas in the polyethylene glycol and water phases and the sequential addition of the premixed homogenized hydrophobic fumed silica in the polyethylene glycol (Phase A) to the premixed homogenized hydrophilic fumed silica in water containing hydrogen peroxide (Phase B) and mixing for about 30 minutes while maintaining the temperature at room temperature, adding the predissolved sodium saccharin and sodium benzoate in water (Phase C) with mixing which effects immediate gellation, adding the pre-solubilized flavor in the nonionic surfactant and water (Phase D) and mixing for about 5-10 minutes until a clear, homogeneous rigid stable dental gel is obtained.
Dependencies are inferred from the claim text.