Loading patent…
AssigneeAMCOL International Corporation
InventorsAshoke K. SenGupta, Ralph Spindler, Jerald W. Darlington JR.
Estimating the term…
Cosmetic and personal care compositions can be manufactured using the multifunctional-additive compositions of the present invention. Such an additive preferably contains one or more particulate-based thickeners, such as a smectite clay, colloidal silica, laponite, and/or alumina, and most preferably one or more smectite clays. According to one important embodiment of the present invention, the thickener particles are co-dispersed with particles of one or more particulate UVR-filters such as titanium dioxide, zinc oxide, or SUNSPHERE (available from International Specialty Chemicals, ISP), and most preferably with the natural particulate sunscreens such as the metal oxides. Another important component of the multifunctional-additive compositions is a dispersant or surface-modifier for the foregoing particulate materials, selected from the family of polyphenolic, natural polymers such as lignosulfonates, lignins, humates, tannates, and derivatives thereof. In addition, these compositions optionally include one or more of the following components: electrolytes, defoamers, humectants, emollients for cosmetics, preservatives, whiteners, and the like.
A multifunctional additive composition for a cosmetic, a personal care, or a topical pharmaceutical formulation, comprising a particulate material, and a polyphenolic natural polymer, for addition to the formulation, said formulation including a hydrophilic liquid selected from the group consisting of water, a hydrophilic organic liquid, and mixtures thereof, said additive improving the efficacy of a sunscreen active material in said formulation, said sunscreen active capable of absorbing ultraviolet radiation in the UVA or UVB wavelength ranges, said additive performing at least one of the following functions when added to said cosmetic, personal care, or pharmaceutical formulation:
A method of manufacturing an additive composition for a cosmetic or a personal care or a pharmaceutical formulation, comprising dispersing a particulate material selected from the group consisting of solid particles, oil droplets, and mixtures thereof, in a hydrophilic liquid selected from the group consisting of water, a hydrophilic organic liquid, and mixtures thereof, wherein the hydrophilic liquid contains a dissolved, polyphenolic natural polymer.
A mastergel composition comprising about 1-65% by weight of a particulate material selected from the group consisting of a smectite clay, an inorganic oxide, and mixtures thereof, and about 0.05-60% by weight of a polyphenolic natural polymer selected from the group consisting of a lignosulfonate, lignin, humate, tannate, and mixtures thereof.
A method of manufacturing a stable, homogeneous gel for use as an additive in a cosmetic or a personal care, or a pharmaceutical formulation, having dispersed particulate material that is stable against coagulation, comprising the steps of:
A method of manufacturing a cosmetic or a personal care or a pharmaceutical composition comprising dissolving one or more polyphenolic natural polymers in a hydrophilic liquid to form a polyphenolic natural polymer solution, and dispersing a particulate material in the polyphenolic natural polymer solution, said particulate material selected from the group consisting of a solid particulate material, a lipophilic organic liquid or an oil, and mixtures thereof, wherein the hydrophilic liquid is selected from the group consisting of water, a hydrophilic organic liquid, and mixtures thereof.
Dependencies are inferred from the claim text.