Cosmetic cream cleanser

Details Cosmetic cream cleanser Cosmetic cream cleanser

2001-05-11

2004-02-24

Padmanabhan, Sreeni (Department: 1617)

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Cosmetic, antiperspirant, dentifrice

C424S070220, C424S070110, C424S070240, C424S486000, C514S844000, C510S130000

Reexamination Certificate

active

06696068

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention concerns a cosmetic cream for cleansing skin and having excellent skinfeel properties.
2. The Related Art
Cream type cosmetic cleansers are difficult to formulate. The term “cream” requires both opacity and a certain thickness. Consumers associate the attributes of opacity and thickness with creamy products. Chemicals imparting these properties can interfere with lathering, phase stability on storage and skinfeel.
U.S. Pat. No. 5,336,497 (Guerrero et al.) discloses cosmetic compositions functioning to remove soil from body surfaces. A combination of silicone copolyol sulfosuccinate and an amphoteric surfactant are employed to achieve a cleaning result.
U.S. Pat. No. 5,236,710 (Guerrero et al.) is a related disclosure reporting on a combination of an anionic sulfosuccinate and an emulsifying polyacrylate. More particularly the patent refers to a silicone copolyol sulfosuccinate and an acrylate/C
10
-C
30
alkyl acrylate crosspolymer.
U.S. Pat. No. 6,113,892 (Newell et al.) discloses compositions delivering both a cleansing action and conditioning. Products disclosed include components which must be selected from a high foaming anionic surfactant, a polymeric cationic conditioning agent, a silicone copolyol sulfosuccinate, an emollient and water.
Although there have been some significant advances in this art, improvements are still necessary to achieve creamy products with thickness and the proper aesthetics.
Accordingly, it is an object of the present invention to provide a cosmetic cream cleanser which delivers a dense luxurious foam.
Another object of the present invention is to provide a cosmetic cream cleanser which is opaque and thick with nevertheless good lather characteristics.
These and other objects of the present will become more readily apparent from consideration of the summary and detailed description which follows.
SUMMARY OF THE INVENTION
A cosmetic cream cleanser composition is provided which includes:
(i) from about 0.1 to about 20% of a silicate;
(ii) from about 0.001 to about 2% of a crosslinked carboxyvinyl polymer other than a long chain C
10
-C
30
alkyl acrylate or methacrylate containing polymer;
(iii) from about 0.01 to about 40% of a silicone copolyol sulfosuccinate; and
(iv) a cosmetically acceptable carrier;
wherein the composition has a viscosity ranging from about 20,000 to about 500,000 cp.
DETAILED DESCRIPTION OF THE INVENTION
Now it has been discovered that a combination of a silicate, a crosslinked carboxyvinyl polymer and a silicone copolyol sulfosuccinate results in a cream cleansing composition with highly desirable characteristics. These include excellent lather, good storage stability and a rich skinfeel.
A first element of the present invention is that of a silicate. Illustrative of this category are aluminum magnesium silicate, magnesium silicate, aluminum silicate, chemically modified magnesium aluminum silicate, smectite clay, bentonites, hectorites, pyrogenic colloidal silica, organically modified montmorillonite clay, hydrated aluminum silicate, fumed silica, barium silicate, calcium silicate, alumina, zeolite and combinations thereof. Particularly preferred is aluminum magnesium silicate available commercially under the trademarks of Gel White and Veegum.
Advantageously, the silicates will be finally divided powders having an average particle size ranging from about 0.0001 micron to about 50 micron, preferably from about 0.01 micron to about 10 micron, more preferably from about 0.1 to about 1.5 micron. Amounts of the silicate may range from about 0.1 to about 20%, preferably from about 0.5 to about 10%, optimally from about 1 to about 5% by weight of the composition.
A second element of the present invention is that of a crosslinked carboxyvinyl polymer other than a long chain C
10
-C
30
alkyl acrylate or methacrylate containing polymer. Illustrative are acrylic acid/ethyl acrylate copolymers and the carboxyvinyl polymers sold under the Carbopol® trademark. The latter consists essentially of a colloidally water-soluble polyalkyenyl polyether crosslinked polymer of acrylic acid crosslinked with from 0.75% to 2.00% of a crosslinking agent such as a polyallyl sucrose or polyallyl pentaerythritol. Specific commercial examples include Carbopol® 934, Carbopol® 940, Carbopol® 950, Carbopol® 951, Carbopol® 980, Carbopol® 981 and Carbopol® 1342. Particularly useful in Carbopol® 934, a water-soluble polymer of acrylic acid crosslinked with about 1% of a polyallyl ether of sucrose having an average of about 5.8 allyl groups for each sucrose molecule. These materials are described in U.S. Pat. No. 2,798,053 (Brown) herein incorporated by reference. Long chain fatty group substituted polymeric ester of acrylic or methacrylic acid such as Pemulen® with CTFA name of acrylates/C10-30 alkyl acrylate crosspolymer are outside the scope of this invention. Amounts of the polymer may range from about 0.001 to about 2%, preferably from about 0.005 to about 1%, optimally from about 0.01 to about 0.1% by weight of the composition.
Another important element of the present invention is that of a silicone copolyol sulfosuccinate.
The preferred silicone copolyol sulfosuccinate is of the formula:
wherein R is an alkylene oxide polymer; M is a cation selected from the group consisting of hydrogen, alkali metal, alkaline earth metal, ammonium and alkanolammonium ions, x and y range in value so as to produce a compound with an equivalent weight between 700 and 1600 grams. R may be further defined as a polymer of ethylene or propylene oxide in the following forms:
wherein a and b range in value from 1 to 30; and
wherein a and b may range in value from 0 to 30.
A related preferred silicone copolyol sulfosuccinate structure according to the present invention is represented by the formula:
wherein X is an amine group obtained from alcohol amines, ethoxylates or propoxylates, preferably derived from the group consisting of monoethanolamine, diethanolamine, triethanolamine, monoisopropanolamine or diglycolamine.
A further related preferred silicone copolyol sulfosuccinate structure according to the present invention is represented by the formula:
wherein M′ is an alkaline earth metal, for example, calcium, magnesium or barium, rather than an alkali metal.
A still further related preferred silicone copolyol sulfosuccinate structure according to the present invention is represented by the following formula:
wherein X is an amine group as described above and obtained from sulfite salts containing the amine group.
The silicone copolyol sulfosuccinates of the present invention are generally prepared by reacting the ethoxylated polyether side chains of dimethicone copolyol with maleic anhydride to form a monoester and then converting the monoester to sulfosuccinate by sulfonation of the double bond with a metallic sulfite. Metallic sulfite and amine salts may also be used either alone or in combination for sulfonation of the double bond. The resulting sulfosuccinate is a silicone-based surfactant which exhibits highly improved mildness and foam stabilizing properties.
Commercially, the silicone copolyol sulfosuccinates are available from the McIntyre Chemical Company under the trademark of Mackanate DC-30 and DC-30A.
Amounts of the silicone copolyol sulfosuccinate for use in compositions of the present invention may range from about 0.01 to about 40%, preferably from about 0.1 to about 20%, more preferably from about 0.2 to about 10%, optimally between about 0.3 and about 2% by weight.
An optional further component of cosmetic cream compositions according to the present invention is that of an anionic co-surfactant. Illustrative but not limiting examples include the following classes:
(1) Alkyl benzene sulfonates in which the alkyl group contains from 9 to 15 carbon atoms, preferably 11 to 14 carbon atoms in straight chain or branched chain configuration. Especially preferred is a linear alkyl benzene sulfonate containing about 12 carbon atoms in the alkyl chain.
(2) Alkyl sulfates obtained by

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