Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Reexamination Certificate
1998-01-28
2002-06-18
Douyon, Lorna M. (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
C510S406000, C510S437000, C510S507000, C510S511000, C424S401000, C514S846000
Reexamination Certificate
active
06407044
ABSTRACT:
TECHNICAL FIELD
The present invention relates to aerosol personal cleansing compositions which provide improved moisturization of the skin. The aerosol personal cleansing compositions of the present invention contain a lipophilic skin moisturizing agent, a surfactant, a stabilizer, water, and a hydrocarbon propellant with a low vapor pressure. The compositions of the invention increase the deposition of the moisturizing agent and increases the lather of the personal cleansing composition. The low vapor pressure propellant also gives the product the appearance of a lotion product.
BACKGROUND OF THE INVENTION
Moisturizing personal cleansing compositions are popular in the United States and around the world. Desirable moisturizing personal cleansing compositions must meet a number of criteria. For example, in order to be acceptable to consumers, a moisturizing personal cleansing product must exhibit good cleaning properties, must exhibit good lathering characteristics, must be mild to the skin (not cause drying or irritation) and preferably should even provide a moisturization benefit to the skin.
Moisturizing personal cleansing products which contain high levels of lipophilic skin conditioning agents have been disclosed. U.S. Pat. No. 5,650,384, issued to Gordon et al., on Jul. 22, 1997 discloses the use of such a cleansing product used in conjunction with a mesh bath sponge. The mesh sponge provides enhanced lathering for the cleansing system.
Aerosol personal skin cleansers are also well known. U.S. Pat. No. 5,002,680, issued to Schmidt et al., on Mar. 26, 1991 discloses mild skin cleansing, aerosol mousses containing lipophilic moisturizing agents. The compositions taught in Schmidt deliver low levels of moisturizing agent deposition to the skin. Also, typical aerosol cleansing products are dispensed from the package as a foam. Some consumers prefer the aesthetic characteristics of a lotion product over a foam.
The skin feel attributes that result from skin conditioning agents being deposited on the skin is enormously popular with consumers. Although products such as Oil of Olay Moisturizing Body Wash ®, which deposit lipophilic skin moisturizing agents on the skin are very popular with consumers, some consumers would prefer to have an even greater moisturizing benefit delivered from these personal cleansing products without loosing product cleansing and lathering characteristics. Therefore, it would be desirable to provide a personal cleansing composition which dispenses from its package as a lotion and has improved moisturization properties.
It has now been found that the deposition of the moisturizing phase of the personal cleansing composition on the skin can be increased by using a hydrocarbon propellant which has a low vapor pressure. The use of low vapor pressure propellants also results in an aerosol product that is delivered with the appearance of a lotion product.
SUMMARY OF THE INVENTION
The present invention relates to an aerosol personal cleansing composition comprising from about 85% to about 95% of a neat cleansing lotion comprising i) from about 0.5% to about 30%, by weight of the neat cleansing lotion, of a lathering surfactant, ii) from about 0.5% to about 40%, by weight of the neat cleansing lotion, of a lipophilic skin moisturizing agent, iii) from about 0.1% to about 2% by weight of the neat cleansing lotion, of a stabilizer, and iv) from about 35% to about 90%, by weight of the neat cleansing lotion, of water; and from about 3% to about 15% of a hydrocarbon propellant having a vapor pressure of from about 3 psig to about 15 psig.
DETAILED DESCRIPTION OF THE INVENTION
The present invention relates to aerosol personal cleansing compositions which provide improved moisturization to the skin. As used herein, “personal cleansing compositions” refers to rinse-off personal cleansing products, including, but not limited to, shower washes, liquid handsoaps, facial cleansers, and shampoos. As used herein, the term “aerosol” refers to a product wherein the neat personal cleansing composition is packaged in a container, along with a propellant gas. “Neat”, as used herein, describes the personal cleansing composition before it is packaged with the propellant. The aerosol compositions of the present invention form a lotion, rather than a foam, after being dispensed from the package. The use of low vapor pressure hydrocarbon propellants in the present invention results in increased deposition of the moisturizing personal cleansing compositions of the present invention. Without being limited by theory it is believed that since hydrocarbon compounds are more soluble in the lipophilic skin moisturizing agent, than non-hydrocarbon compounds, some of the hydrocarbon propellants are solubilized in the lipophilic skin moisturizing agent, changing the rheology of the agent. The hydrocarbon appears to make the high viscosity moisturizing agent more spreadable, which increases the deposition of the agent. When low vapor pressure hydrocarbon propellants are solubilized in the moisturizing agent in a aqueous surfactant matrix, it has been found that a distinct highly concentrated lamellar phase crystalline structure is formed which results in a further increase in deposition of the moisturizing agent.
The aerosol personal cleansing compositions of the present invention contain a lathering surfactant, a lipophilic skin moisturizing agent, a stabilizer, water and a low vapor pressure propellant. The personal cleansing compositions are preferably emulsions which are made up of a moisturizing phase and an aqueous cleansing phase. The aerosol personal cleansing compositions are described in detail as follows.
I. Ingredients
A. Lipophilic Skin Moisturizing Agent
The aerosol personal cleansing compositions of the present invention comprise from about 0.5% to about 40%, preferably from about 3% to about 30%, more preferably from about 5% to about 25%, by weight of the composition, of a lipophilic skin moisturizing agent.
The lipophilic skin moisturizing agents suitable for use herein typically have a consistency (k) which ranges from about 0.01 poise to about 1000 poise, preferably from about 100 poise to about 1000 poise, more preferably from about 200 poise to about 800 poise, and most preferably from about 400 poise to about 500 poise, as measured by the Viscosity Method for Lipophilic Skin Moisturizing Agents hereinafter set forth in the Analytical Methods section.
In some cases, the lipophilic skin moisturizing agent can also desirably be defined in terms of its solubility parameter, as defined by
Vaughan in Cosmetics and Toiletries
, Vol. 103, p. 47-69, October 1988. A lipophilic skin moisturizing agent having a Vaughan solubility Parameter (VSP) of from 5 to 10, preferably from 5.5 to 9 is suitable for use in the moisturizing personal cleansing compositions herein.
A wide variety of lipid type materials and mixtures of materials are suitable for use as the lipophilic skin moisturizing agents in the personal cleansing compositions of the present invention. Preferably, the lipophilic skin conditioning agent is selected from the group consisting of hydrocarbon oils and waxes, silicones, fatty acid derivatives, cholesterol, cholesterol derivatives, di- and tri-glycerides, vegetable oils, vegetable oil derivatives, liquid nondigestible oils such as those described in U.S. Pat. No. 3,600,186 to Mattson; Issued Aug. 17, 1971 and 4,005,195 and 4,005,196 to Jandacek et al; both issued Jan. 25, 1977, all of which are herein incorporated by reference, or blends of liquid digestible or nondigestible oils with solid polyol polyesters such as those described in U.S. Pat. No. 4,797,300 to Jandacek; issued Jan. 10, 1989; U.S. Pat. Nos. 5,306,514, 5,306,516 and 5,306,515 to Letton; all issued Apr. 26, 1994, all of which are herein incorporated by reference, and acetoglyceride esters, alkyl esters, alkenyl esters, lanolin and its derivatives, milk-tri-glycerides, wax esters, beeswax derivatives, sterols, phospholipids and mixtures thereof. Fatty acids, fatty acid soaps and water soluble polyols ar
Douyon Lorna M.
Murphy Stephen T.
Rosnell Tara M.
The Proctor & Gamble Company
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