Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Cosmetic – antiperspirant – dentifrice
Reexamination Certificate
1999-06-25
2004-02-03
Hartley, Michael G. (Department: 1616)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Cosmetic, antiperspirant, dentifrice
C424S070100, C424S070120, C424S070190
Reexamination Certificate
active
06685952
ABSTRACT:
BACKGROUND OF THE INVENTION
Typical hair conditioning products are usually based upon a cationic surfactant, generally a quaternary ammonium compound and fatty alcohol. This combination results in an oil-in-water lamellar gel-network that provides the formulation with a thick creamy rheology/viscosity. However, while such traditional compositions deliver conditioning benefits to the hair, the fatty alcohols and quaternary components also deposit onto the hair and continually build-up with each usage, making the hair look and feel weighed down and greasy.
The present invention is directed to a vehicle to deliver beneficial components to the hair and skin. The product forms for hair include leave-on or rinse-off conditioners, shampoos, hair color, and styling aids. The product forms for skin include leave-on or rinse-off skin care products such as lotions and creams.
The following are publications relating to this field of technology:
U.S. Pat. No. PATENT DOCUMENTS
U.S. Pat. No. 4,311,695
U.S. Pat. No. 4,122,029 Gee et al.
U.S. Pat. No. 4,268,499
U.S. Pat. No. 4,218,250
U.S. Pat. No. 4,151,204
U.S. Pat. No. 4,057,622
U.S. Pat. No. 5,534,246 Herb et al., “Topically Effective Compositions” Jul. 9, 1996.
U.S. Pat. No. 4,499,069
U.S. Pat. No. 4,784,344
U.S. Pat. No. 4,948,578 Burger et al.
U.S. Pat. No. 5,216,033
U.S. Pat. No. 5,587,153 Angelone, Jr. et al., “Clear, Gelled Aluminum and Zirconium Salt Containing Antiperspirant Formulation,” Dec. 24, 1996.
FOREIGN PATENT DOCUMENTS
EP 0,435,483
EP 0,271,925
JP 7-165529
SUMMARY OF THE INVENTION
The present invention is a high internal phase water-in-oil emulsion. High internal phase water-in-oil emulsions are defined as having greater than about 80% dispersed aqueous phase. The internal phase is defined as the non-continuous aqueous phase component of the emulsion. When compared to traditional oil-in-water conditioners, the hair is not weighed down as much by compositions of the present invention because fatty alcohols are not present in and are not deposited by the present hipe w/o formulations. The hipe water-in-oil conditioners thus leave the hair with a greater amount of natural volume, bounce and body. Previous water-in-oil emulsion systems known to those in the art of formulating hair and skin care products typically have dispersed water phases less than 80%. By contrast, the hipe water-in-oil emulsions systems of the present invention tend to deposit less silicone oil on the hair surface leading to improved rinsing and less greasiness and better overall dry hair aesthetics.
The present high internal phase water-in-oil emulsions (hipes) show superior aesthetic properties on skin by releasing the silicone oil more readily when compared to previous lower-internal phase water-in-oil systems (lipes), thereby giving the impression of easier spreading and quicker absorption on the skin surface. Hipes can be utilized for easier application and absorption when compared to lipes.
In the case of skin or hair leave on products, an ideal composition for the delivery of a topically-active compound to the skin or hair would be one that delivers the topically-active agent such that it adheres to the skin or hair while the topically-inactive ingredients evaporate or are removed from the site. Topically delivered active compounds, such as topical medicines or skin care compounds, have conventionally been formulated as either oil-in-water emulsions or water-in-oil emulsions. However, prior topical compositions prepared as these emulsions typically felt wet, sticky and tacky when applied to the skin substrate. Topical effective compositions should preferably possess the properties of smoothness, non-oiliness, and non-tackiness. In addition, the topically effective compositions should not have a wet feel. Therefore, it would be desirable to provide aesthetic benefits for non-greasy, non-sticky, non-wet feeling in topically effective compositions. The hipes can be utilized with sunscreen or anti-wrinkle agents or reactive agents.
A second disadvantage of typical hair and skin emulsion compositions is the complex preparation methods. The method traditionally requires high processing temperatures, and a series of heating or cooling steps. By contrast, the present invention, is prepared by a simple process without heating or cooling. The invention can also be made clear through the simple technique of refractive index matching. The present invention provides topically effective compositions which overcome the above-described difficulties and disadvantages of prior hair and skin emulsion compositions.
The present invention is directed to providing lotion or gel-type topically effective compositions, which exhibit these consumer acceptable aesthetic properties as well as functional properties.
The present invention also is suitable for application to skin as a lotion, cream or gel and may also contain topically active components such as but not limited to ultraviolet absorbers (sunscreens) or alpha hydroxy acids. The present invention also addresses improving upon the oiliness or greasiness of such products through the use of the high internal phase inverse water-in-oil emulsions. For example, in U.S. Pat. No. 5,216,033 and EP 435,483 A2, Pereira described examples of water-in-silicone skin care lotions. However, these prior formulations were more difficult to spread, felt more greasy, had greater residue and were more difficult to absorb into the skin (See Table 5).
BRIEF SUMMARY OF THE INVENTION
The invention is directed to a topical composition selected from the group consisting of:
A.) A hair care composition which is a high internal phase water-in-oil emulsion which comprises:
(I) an oil phase which further comprises i.) a mixture of non-volatile and volatile silicone oils, and ii.) a silicone surfactant; and
(II) which comprises an aqueous phase;
and which substantially lacks a fatty alcohol; and
B.) A skin care composition which is a high internal phase water-in-oil emulsion which comprises:
(I) an oil phase which further comprises i.) a mixture of non-volatile and volatile silicone oils, and ii.) a silicone surfactant; and
(II) which comprises an aqueous phase.
More specifically, the present invention is directed to a hair care or skin composition which is a high internal phase water-in-oil inverse emulsion having improved efficacy, and to methods of using the high internal phase emulsion compositions. More particularly, the present invention is directed to a high internal phase water-in-silicone oil emulsion comprising a continuous external oil phase and an aqueous internal phase.
The continuous oil phase contains a silicone surfactant, and volatile and non-volatile silicone oils. The internal aqueous phase comprises water.
The compositions of the present invention comprise a high internal water phase emulsion, with a non-volatile silicone and a volatile, hydrophobic component suitable for application to either hair or skin. In particular, the present invention relates to hair and skin compositions comprising a high internal water phase emulsion which comprises: (1) less than about 20% of a continuous oil phase comprising (a) silicone surfactant or mixtures thereof; (b) a volatile oil and (2) at least about 80% of an aqueous internal phase and methods of treating the hair or skin.
It is the objective of the present invention to provide personal care compositions, having lower levels of oil phase, that offer advantages for both skin and hair care. The advantages for rinse-off hair care products include the ease of rinsing and leaving the hair with more of its natural body. Advantages for leave-on hair products and skin care products include less heaviness, less greasiness, less sticky and less tacky feel and leaving the hands free of residue when compared to typical water-in-oil skin formulations.
By utilizing low levels of silicone surfactant and very volatile dimethicones, the formulations of the invention have been able to overcome the difficulty of rinsing out the formulation from the hair.
High internal phase emulsions (HIPEs or hipes) may al
Brandt Loralei Marie
Ma Zhu-ning
Neill Paul Howard
Newell Gerald Patrick
Nogaj Bozena
Hartley Michael G.
Honig Milton L.
Unilever Home & Personal Care USA , division of Conopco, Inc.
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