Drug – bio-affecting and body treating compositions – Anti-perspirants or perspiration deodorants
Reexamination Certificate
2002-02-19
2002-10-22
Dodson, Shelley A. (Department: 1616)
Drug, bio-affecting and body treating compositions
Anti-perspirants or perspiration deodorants
C424S066000, C424S067000, C424S068000, C424S400000, C424S401000
Reexamination Certificate
active
06468513
ABSTRACT:
TECHNICAL FIELD
The present invention relates to personal care antiperspirant compositions and particularly relates to liquid antiperspirant compositions which are applied topically to the skin (i.e., roll-on compositions).
BACKGROUND OF THE INVENTION
Deodorant and antiperspirant compositions are well-accepted and popular modes of personal care and personal hygiene. As a supplement to the periodic bathing of the body, these compositions counteract odors and prevent perspiration which can occur on the body between times that the body is washed. Deodorant and antiperspirant compositions are generally applied topically to the skin, for example in the underarm area, and there are a wide variety of compositions which can be used to do this. For example, solid sticks, liquid roll-ons, cream compositions, gel compositions, and aerosol sprays are but some of the forms which deodorant and antiperspirant compositions can take. The feel of a particular composition as it is applied to the skin (i.e., its perceived wetness and tackiness) is very important to the user and is frequently a determining factor in whether that composition will be repurchased in the future.
The primary consumer benefit of an antiperspirant or deodorant product is clearly its antiperspirant or deodorant efficacy. However, in addition to such primary efficacy, the fact that a composition does not leave a white residue on the skin or clothing and also provides good skin feel are two very important cosmetic benefits of an antiperspirant or deodorant product. In the past, delivering a nonwhitening product has been accomplished by means of mechanical processing of the product or use of butylene glycol in the product. Mechanical processing is limited in that high shear mixing can only achieve a certain level of nonwhitening on the skin. While butylene glycol is effective as a nonwhitening agent, its use in a liquid composition can result in an undesirable sticky and tacky feel when the composition is applied to the skin.
It clearly would be very useful to have an efficacious antiperspirant composition, formulated as a liquid roll-on, which does not leave a white residue and also has good skin feel properties when applied topically. This result is obtained, as described herein, by formulating a liquid antiperspirant composition which includes an antiperspirant active, a volatile carrier, such as a cyclic siloxane, a high molecular weight silicone material, and a formulation aid selected from polyethylene, hydrophobic organic esters, and mixtures of those materials.
PCT Patent Application WO 99/51192, published Oct. 14, 1999, describes a gel form antiperspirant composition which is said to reduce white residue on skin and improve skin feel, while reducing syneresis of the composition on storage. The composition comprises a silicone gel containing a crosslinked polyorganosiloxane elastomer and at least one nonionic surfactant having an HLB of from 8 to 16, together with an antiperspirant active. It is thought that the composition may be formulated as a solid, semi-solid, cream or liquid having a viscosity of at least about 1000 cps; roll-on compositions are specifically disclosed. For example, the application discloses a roll-on antiperspirant composition which includes a silicone cross-polymer, a volatile silicone, an antiperspirant active, a nonionic surfactant, emollients, a thickener, and fragrance components.
European Patent Application EP 0 251 679, published Jan. 7, 1988, describes a solid stick composition for delivering skin treating or cosmetic materials to the skin. The stick comprises a stable alcohol-silicone mixture gelled by a sodium salt of a higher fatty acid (such as sodium stearate). The composition includes a polydiorganosiloxane-polyoxyalkyene copolymer and a volatile silicone. The entire basis of this invention is the formulation of a solid stick which is compatible with an antiperspirant active; the composition is not a liquid roll-on.
PCT Patent Application WO 00/96402, published Nov. 23, 2000discloses low residue antiperspirant compositions which comprise cyclohexasiloxane as the volatile siloxane component, and which are substantially free of cyclotetrasiloxane. Examples 1-7 of the application describe aqueous emulsion compositions which contain dimethicone copolyol. Examples 13-15 of the application describe antiperspirant roll-on compositions which include polyethylene powder.
European Patent Application EP 0 400 546, published Dec. 8, 1993, describes a topical composition for delivering an active material (which may be an antiperspirant active) to the skin. The composition may be formulated as a liquid roll-on. The composition comprises an antiperspirant active, a volatile carrier (such as cyclomethicone), finely divided silica, a wax, and an ester including at least 10 carbon atoms (such as dioctyl adipate).
PCT Patent Application WO 99/26597, published Jun. 3, 1999, describes antiperspirant compositions which include borage seed oil to provide a skin anti-irritancy benefit. The application teaches the inclusion of what are said to be conventional ingredients in antiperspirant formulations: volatile carriers (such as cyclomethicone), and nonvolatile emollients (such as fatty alcohol esters, including cetyl palmitate, butyl myristate, and glyceryl stearate).
PCT Patent Application WO 97/15270, published May 1, 1997, describes antiperspirant formulations, in the form of a stick, roll-on or cream, which include bicarbonate crystallites and boron oxide particulates. The boron oxide material is said to neutralize irritant impurities which may be present in the bicarbonate component. The application discloses a roll-on composition which includes an antiperspirant active, a volatile oil (for example, cyclomethicone), and a liquid emollient (such as 2-ethylhexyl palmitate).
PCT Patent Application WO 98/09612, published Mar. 12, 1998, describes solid antiperspirant compositions (which do not include liquid roll-on compositions) containing hexanediol-behenyl beeswax as a gelling agent. The example compositions in the application include cyclomethicone, dimethicone copolyol and polyethylene.
U.S. Pat. No. 5,942,215, Edwards et al., issued Aug. 24, 1999, describes an antiperspirant stick composition (not a liquid roll-on) which includes an antiperspirant active, a volatile silicone (e.g., cyclomethicone), a crosslinked silicone elastomer, and a structurant. The compositions can also include polyethylene as an optional component.
U.S. Pat. No. 5,626,856, Berndt, issued May 6, 1997, describes a topical delivery system for cosmetics and pharmaceuticals comprising a volatile cyclosiloxane, an oil or glyceride ester, and a particulate carbohydrate. The compositions are taught to be useful for antiperspirant products. Example 2 is a liquid antiperspirant composition which includes cyclomethicone, starch, white petrolatum, and an antiperspirant active.
U.S. Pat. No. 5,654,362, Schulz, Jr., et al., issued Aug. 5, 1997, covers Dow 9040 silicone elastomer. Example 3 discloses the use of the silicone elastomer in an antiperspirant formulation; the exemplified composition is said to be highly spreadable, with a dry skin feel and low residue on the skin. This composition includes an antiperspirant active, a silicone powder, and octyl palmitate. See also related U.S. Pat. No. 5,880,210.
SUMMARY OF THE INVENTION
The present invention relates to liquid antiperspirant compositions which comprise:
(a) from about 10% to about 70% of an antiperspirant active material;
(b) from about 20% to about 80% of a volatile carrier, such as a volatile siloxane, for example, cyclomethicone;
(c) from about 0.5% to about 5% of a high molecular weight silicone material, for example, a silicone gum, dimethicone copolyol, or a crosslinked silicone polymer;
(d) from about 0.5% to about 5% of a polyethylene wax; and
(e) from about 1% to about 8% of hydrophobic organic esters (such as esters containing from about 10 to about 40 carbon atoms, for example cetearyl ethylhexanoate).
The compositions may optionally include from about 0.5% to about
Boyle Kristin Ann
Murphy C. Shawn
Dodson Shelley A.
Frost Brown Todd LLC
The Andrew Jergens Company
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