Drug – bio-affecting and body treating compositions – Anti-perspirants or perspiration deodorants
Patent
1998-04-14
1999-08-17
Dodson, Shelley A.
Drug, bio-affecting and body treating compositions
Anti-perspirants or perspiration deodorants
424 66, 424 68, 424400, 424401, 424DIG5, A61K 737, A61K 734, A61K 738, A61K 700
Patent
active
059390557
DESCRIPTION:
BRIEF SUMMARY
The invention relates to clear gel cosmetic sticks which include a solubilized antiperspirant salt.
Gel antiperspirant sticks typically include a liquid vehicle, an antiperspirant salt, a gelling agent, and one or more emollients. Dibenzylidene alditols like dibenzylidene sorbitol (DBS), also known as dibenzylidene monosorbitol acetal (DBMSA), are one type of gelling agent that has been used in such sticks. Dibenzylidene alditols may degrade during manufacture and subsequent storage of the gel stick, in part because of the presence of the acidic antiperspirant salt in the stick. One product of the degradation, benzaldehyde, can provide an undesirable odor and can cause the stick to lose hardness and to become discolored. Commercially available DBS gel antiperspirant sticks generally contain more than 2% DBS in order to have sufficient hardness. However, such sticks do not have optimum clarity or odor characteristics.
Various stabilizing agents have been incorporated into gel antiperspirant sticks containing dibenzylidene alditols in an effort to minimize dibenzylidene alditol degradation. Examples include sodium hydroxide, potassium hydroxide, sodium carbonate, zinc acetate, zinc oxide, zinc carbonate, potassium carbonate, diethanolamine, triethanolamine, disodium succinate, sodium benzoate, sodium octanoate, hexamethylenetetramine, urea, 2-amino-2-methyl-1-propanol, magnesium sulfate, calcium hydroxide, and N-(2-hydroxyethyl) acetamide. These and other stabilizing agents, although apparently effective to some degree in stabilizing the dibenzylidene alditol, may have other problems associated with them. Sodium hydroxide and potassium hydroxide, for example, may provide a composition with an undesirable odor.
The invention features a clear gel cosmetic stick which includes a liquid vehicle, an antiperspirant salt dissolved in the liquid vehicle, and a dibenzylidene alditol, and is further characterized in that said stick includes a hydroxyalkyl cellulose or a chelating agent or both a hydroxyalkyl cellulose and a chelating agent. The cosmetic stick comprises in percent by weight about 70% to about 95%, preferably 75% to 92%, of a liquid vehicle, about 1% to about 22%, preferably 3% to 15%, of an antiperspirant salt dissolved in said vehicle, about 0.5% to about 3%, preferably 0.5% to 1.5%, of a dibenzylidene alditol, about 0.1% to about 0.5%, preferably 0.2% to 0.4%, of a hydroxyalkyl cellulose, and about 0.05% to about 3%, preferably 0.1% to 2%, of a chelating agent. Preferably the liquid vehicle comprises a polyhydric alcohol having from 3 to 6 carbon atoms and from 2 to 6 hydroxyl groups and is substantially free of monohydric alcohol and strong alkali such as sodium hydroxide and potassium hydroxide. Preferably the cosmetic stick will have a pH greater than 4.4, more preferably greater than 4.7, a turbidity of less than about 120 NTU, more preferably less than 100 NTU, and a hardness of about 60 to 150. By lowering the dibenzylidene alditol level to 1.5% or lower, the clarity and odor characteristics of the stick are greatly improved. The hardness of the stick is maintained by the addition of the hydroxyalkyl cellulose. The color of the stick is improved by the addition of the chelating agent.
A "clearing" gel stick, as used herein, is a stick that is visually clear so that, like glass, it allows ready viewing of objects behind it. Preferred clear gel sticks have a turbidity measurement, expressed in Nephelometric Turbidity Units (NTU) of less than 120 NTU, more preferably less than 100 NTU, and most preferably less than 80 NTU, when measured with a Hellige #965 Direct-Reading Turbidimeter. By "substantially free of off-odor" is meant that the gel stick (without any fragrance or fragrance masking agent) has an off-odor rating of 0 to 2, preferably 0 to 1, on a scale of 0 to 5 used by trained odor (or perfumery) experts, where 0 signifies no detectable off-odor and a rating of 4 to 5 is deemed unacceptable odor. By "stable" is meant that samples of the product, when stored at 45.degree. C. for three mont
REFERENCES:
patent: H1473 (1995-08-01), Orofino et al.
patent: 3981986 (1976-09-01), Rubino
patent: 4017599 (1977-04-01), Rubino
patent: 4154816 (1979-05-01), Roehl et al.
patent: 4346079 (1982-08-01), Roehl
patent: 4383988 (1983-05-01), Teng et al.
patent: 4518582 (1985-05-01), Schamper et al.
patent: 4719102 (1988-01-01), Randhawa et al.
patent: 4720381 (1988-01-01), Schamper et al.
patent: 4722835 (1988-02-01), Schamper et al.
patent: 4725430 (1988-02-01), Schamper et al.
patent: 4743444 (1988-05-01), McCall
patent: 4781917 (1988-11-01), Luebbe et al.
patent: 4816261 (1989-03-01), Luebbe et al.
patent: 4822602 (1989-04-01), Sabateili
patent: 4948578 (1990-08-01), Burger et al.
patent: 4954333 (1990-09-01), Ward
patent: 5106999 (1992-04-01), Gardlik et al.
patent: 5162378 (1992-11-01), Guthauser
patent: 5200174 (1993-04-01), Gardlik et al.
patent: 5270034 (1993-12-01), Cheng
patent: 5286755 (1994-02-01), Kauffmann et al.
patent: 5346694 (1994-09-01), Juneja
patent: 5368848 (1994-11-01), Brazinsky et al.
patent: 5376363 (1994-12-01), Benfatto et al.
patent: 5405605 (1995-04-01), Shin
patent: 5463098 (1995-10-01), Giovanniello et al.
patent: 5490979 (1996-02-01), Kasat et al.
patent: 5516511 (1996-05-01), Motley et al.
patent: 5520907 (1996-05-01), Orogino et al.
patent: 5585092 (1996-12-01), Trandai
patent: 5705171 (1998-01-01), Iovanni et al.
patent: 5725846 (1998-03-01), Vu et al.
Klepak, "Antiperspirants take a clear lead", Manufacturing Chemist (Nov. 1994), pp. 31-36.
Disorbene, Roquette product brochure (1992).
The Merck Index (9.sup.th ed. 1976), p.778 (No. 5825).
Schwarzenbach,Complexometric Titrations (2nd English ed., 1969), pp. 145-155, 268-269.
Iovanni Carl F.
Sane Jayant N.
Vu Tuan M.
Dodson Shelley A.
The Gillette Company
Williams Stephan P.
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