Cosmetic compositions with ammonium malonates

Abstract

A cosmetic composition is provided which includes as an active material a salt formed from neutralization of malonic acid with ammonia or a C1-C10 hydrocarbyl amine, the composition having a pH from 1.8 to 6.5. Particularly preferred is ammonium malonate.

Description

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The invention concerns cosmetic compositions containing ammonium malonates which combat the signs of skin aging.

[0003] 2. The Related Art

[0004] A soft, supple and flexible skin has a marked cosmetic appeal and is an attribute of normal functioning epidermis. As human skin ages with advancing years, the epidermis can become folded, ridged or furrowed to form wrinkles. These signal loss of youthful appearance and herald the transition to old age. Exposure to excessive doses of sunlight accelerates the transition process. Also, the outer layer of the epidermis known as the stratum corneum can become dry and flaky following exposure to cold weather or excessive contact with detergents or solvents. Loss of skin moisture thereby results and the skin begins to lose the soft, supple and flexible characteristics.

[0005] Emollients such as fats, phospholipids and sterols have in the past been used to soften wrinkled or dry skin. These emollients are only partially effective as a remedy for skin in poor condition.

[0006] The use of hydroxy carboxylic acids for enhancing the quality of human skin has been known for some time. There is no doubt that alpha-hydroxy carboxylic acids are effective much beyond the common emollients.

[0007] U.S. Pat. No. 4,424,234 (Alderson et at.) discloses skin treatment compositions incorporating alpha-hydroxycaproic acid and alpha-hydroxycaprylic acid or mixtures thereof in compositions that have a pH value of less than 7, usually from 2 to 4. Yu and Van Scott have patented widely in this area. For instance, U.S. Pat. No. 4,105,782 reports amines or ammonium salts of alpha-hydroxy carboxylic acids in the treatment of acne or dandruff. In U.S. Pat. No. 4,105,783 and U.S. Pat. No. 4,197,316, these compounds are suggested for the treatment of dry skin. U.S. Pat. No. 4,234,599 discloses the use of alpha-hydroxy carboxylic acids, their esters or amine salts in the treatment of keratoses. More recently, U.S. Pat. No. 5,091,171 focused attention on these compounds as being effective against age spots, wrinkles and aging related skin changes.

[0008] While hydroxy carboxylic acids hold much therapeutic promise, the materials have been found to irritate human skin on repeated topical applications. The irritation may range from a sensation of tingling, itching and burning to clinical signs of redness and peeling. Causes for such irritation have been linked to the lowering of pH in the stratum corneum of human skin. Low pH has been suggested as provoking disturbances in intercorneocyte bondings resulting in adverse skin reactions, specialty in some individuals with sensitive skin.

[0009] Organic acids other than alpha-hydroxy functionalized have been disclosed in the cosmetic literature. For instance, U.S. Pat. No. 5,641,495 (Jokura et at.) discloses in combination a ceramide or pseudoceramide, a dicarboxylic acid and a salt of a dicarboxytic acid. The Examples illustrate sodium and potassium salts of succinic acid. Lower molecular weight dicarboxylic acids such as malonic may also be utilized. Although excellent moisturization and little accompanying irritation occurs, there is no suggestion that this system combats signs of aging such as advent of fine lines and wrinkles. Improvements in the general anti-aging technology of skin remains as an unfulfilled need of the consumer.

[0010] Accordingly, it is an advantage of the present invention to provide new cosmetic ingredients in compositions which are effective at controlling and even eliminating the signs of aging, particularly fine tines, wrinkles, sagging skin, poor tone and age spots.

SUMMARY OF THE INVENTION

[0011] A cosmetic composition is provided which includes:

[0012] (i) from about 0.0001 to about 30% by weight of a salt which is an amine neutralized malonic acid;

[0013] (ii) from about 1 to about 99.9% by weight of a cosmeticalLy acceptable carrier;

[0014] wherein the composition has a pH ranging from about 1.8 to 6.5.

DETAILED DESCRIPTION OF THE INVENTION

[0015] We have now found a class of salts which are at least as effective as alpha-hydroxy carboxytic acids. These salts are based on malonic acid neutralized with an amine which is ammonia or a C1-C10 hydrocarbyl amine as the active salt ingredient. These salts may either be the half or fully neutralized malonate salts or combinations thereof as represented by general formulas (I) and (II): 1

[0016] wherein X is a protonated ammonia or a C1-C10 hydrocarbyt amine.

[0017] Illustrative amines include ammonia, triethanolamine, diethanolamine, monoethanolamine, methylamine, ethylamine, propylamine, isopropylamine, butylamine, isobutylamine, t-butylamine, pentylamine, isopentylamine, hexylamine, cyclohexylamine, cyclopentylamine, norbornylamine, octylamine, ethylhexylamine, nonylamine, decylamine and combinations thereof. Most preferred is ammonia which forms the ammonium salts of malonate and includes ammonium malonate and diammonium malonate.

[0018] Amounts of the amine neutralized malonic acid salt may range from about 0.0001 to about 30%, preferably from about 0.1 to about 15%, more preferably from about 0.5 to about 10%, optimally from about 1 to about 8% by weight of the cosmetic composition.

[0019] The present invention can utilize as the active ingredient salt I, salt II or mixtures of these salts. When mixtures are present the molar ratio of mono-salt I to di-salt II may range from about 1000:1 to about 1:1000, preferably from about 10:1 to about 1:500, more preferably from about 2:1 to about 1:200, optimally from about 1:1 to about 1:20.

[0020] Compositions of this invention may have a pH ranging from about 1.8 to about 6.5, preferably from about 2.5 to about 6, optimally from about 3 to about 5.5, more optimally from about 3.5 to about 4.5.

[0021] Compositions of this invention will also include a cosmetically acceptable carrier. Amounts of the carrier may range from 1 to 99.9%, preferably from about 70 to about 95%, optimally from about 80 to about 90%. Among the useful carriers are water, emollients, fatty acids, fatty alcohols, humectants, thickeners and combinations thereof. The carrier may be aqueous, anhydrous or an emulsion. Preferably the compositions are aqueous, especially water and oil emulsions of the W/O or O/W variety. Water when present may be in amounts ranging from about 5 to about 95%, preferably from about 20 to about 70%, optimally from about 35 to about 60% by weight.

[0022] Emollient materials may serve as cosmetically acceptable carriers. These may be in the form of silicone oils, synthetic esters and hydrocarbons. Amounts of the emollients may range anywhere from about 0.1 to about 95%, preferably between about 1 and about 50% by weight.

[0023] Silicone oils may be divided into the volatile and nonvolatile variety. The term “volatile” as used herein refers to those materials which have a measurable vapor pressure at ambient temperature. Volatile silicone oils are preferably chosen from cyclic (cyclomethicone) or linear polydimethylsitoxanes containing from 3 to 9, preferably from 4 to 5, silicon atoms.

[0024] Nonvolatile silicone oils useful as an emollient material include polyalkyl siloxanes, polyalkylaryl siloxanes and polyether siloxane copolymers. The essentially nonvolatile polyalkyl siloxanes useful herein include, for example, polydimethyl siloxanes with viscosities of from about 5×10−6 to 0.1 m2/s at 25° C. Among the preferred nonvolatile emollients useful in the present compositions are the polydimethyl siloxanes having viscosities from about 1×10−5 to about 4×10−4 m2/s at 25° C.

[0025] Another class of nonvolatile silicones are emulsifying and non-emulsifying silicone elastomers. Representative of this category is Dimethicone/Vinyl Dimethicone Crosspolymer available as Dow Corning 9040, General Electric SFE 839, and Shin-Etsu KSG-18. Silicone waxes such as Sitwax WS-L (Dimethicone CopQlyol Laurate) may also be useful.

[0026] Among the ester emollients are:

[0027] (1) Alkenyl or alkyl esters of fatty acids having 10 to 20 carbon atoms. Examples thereof include isoarachidyl neopentanoate, isononyl isonanonoate, oleyl myristate, oleyl stearate, and oleyt oleate.

[0028] (2) Ether-esters such as fatty acid esters of ethoxylated fatty alcohols.

[0029] (3) Polyhydric alcohol esters. Ethylene glycol mono and di-fatty acid esters, diethylene glycol mono- and di-fatty acid esters, polyethylene glycol (200-6000) mono- and di-fatty acid esters, propylene glycol mono- and di-fatty acid esters, polypropylene glycol 2000 monooleate, polypropylene glycol 2000 monostearate, ethoxylated propylene glycol monostearate, glyceryl mono- and di-fatty acid esters, polyglycerol poly-fatty esters, ethoxylated glyceryl mono-stearate, 1,3-butylene glycol monostearate, 1,3-butylene glycol distearate, polyoxyethylene polyol fatty acid ester, sorbitan fatty acid esters, and polyoxyethylene sorbitan fatty acid esters are satisfactory polyhydric alcohol esters. Particularly useful are pentaerythritol, trimethylolpropane and neopentyl glycol esters of C1-C30 alcohols.

[0030] (4) Wax esters such as beeswax, spermaceti wax and tribehenin wax.

[0031] (5) Sterols esters, of which cholesterol fatty acid esters are examples thereof.

[0032] (6) Sugar ester of fatty acids such as sucrose polybehenate and sucrose polycottonseedate.

[0033] Hydrocarbons which are suitable cosmetically acceptable carriers include petrolatum, mineral oil, C11-C13 isoparaffins, polyalphaolefins, and especially isohexadecane, available commercially as Permethyl 101A from Presperse Inc.

[0034] Fatty acids having from 10 to 30 carbon atoms may also be suitable as cosmetically acceptable carriers. Illustrative of this category are pelargonic, lauric, myristic, palmitic, stearic, isostearic, hydroxystearic, oleic, linoleic, ricinoleic, arachidic, behenic and erucic acids.

[0035] Fatty alcohols having from 10 to 30 carbon atoms are another useful category of cosmetically acceptable carrier. Illustrative of this category are stearyl alcohol, lauryl alcohol, myristyl alcohol and cetyl alcohol.

[0036] Humectants of the polyhydric alcohol-type can be employed as cosmetically acceptable carriers. Typical polyhydric alcohols include glycerol, polyalkylene glycols and more preferably alkylene polyols and their derivatives, including propylene glycol, dipropylene glycol, polypropylene glycol, polyethylene glycol and derivatives thereof, sorbitol, hydroxypropyl sorbitol, hexylene glycol, 1,3-butylene glycol, isoprene glycol, 1,2,6-hexanetriol, ethoxylated glycerol, propoxylated glycerol and mixtures thereof. The amount of humectant may range anywhere from 0.5 to 50%, preferably between 1 and 15% by weight of the composition.

[0037] Thickeners can be utilized as part of the cosmetically acceptable carrier of compositions according to the present invention. Typical thickeners include crosslinked acrylates (e.g. Carbopol 982®), hydrophobically-modified acrylates (e.g. Carbopol 1382®), cellulosic derivatives and natural gums. Among useful cellulosic derivatives are sodium carboxymethylceltulose, hydroxypropyl methocellulose, hydroxypropyl cellulose, hydroxyethyl cellulose, ethyl cellulose and hydroxymethyl cellulose. Natural gums suitable for the present invention include guar, xanthan, sclerotium, carrageenan, pectin and combinations of these gums. Inorganics may also be utilized as thickeners, particularly clays such as bentonites and hectorites, fumed silicas, and silicates such as magnesium aluminum silicate (Veegum®). Amounts of the thickener may range from 0.0001 to 10%, usually from 0.001 to 1%, optimally from 0.01 to 0.5% by weight.

[0038] Cosmetic compositions of the present invention may be in any form. These forms may include lotions, creams, roll-on formulations, sticks, mousses, aerosol and non-aerosot sprays and pad-applied formulations.

[0039] Surfactants may also be present in cosmetic compositions of the present invention. Total concentration of the surfactant when present may range from about 0.1 to about 40%, preferably from about 1 to about 20%, optimally from about 1 to about 5% by weight of the composition. The surfactant may be selected from the group consisting of anionic, nonionic, cationic and amphoteric actives. Particularly preferred nonionic surfactants are those with a C10-C20 fatty alcohol or acid hydrophobe condensed with from 2 to 100 moles of ethylene oxide or propylene oxide per mole of hydrophobe; C2-C10 alkyl phenols condensed with from 2 to 20 motes of alkylene oxide; mono- and di-fatty acid esters of ethylene glycol; fatty acid monoglyceride; sorbitan, mono- and di-C8-C20 fatty acids; and polyoxyethylene sorbitan as well as combinations thereof. Alkyl polyglycosides and saccharide fatty amides (e.g. methyl gluconamides) are also suitable nonionic surfactants.

[0040] Preferred anionic surfactants include soap, alkyl ether sulfates and sulfonates, alkyl sulfates and sulfonates, alkylbenzene sulfonates, alkyl and dialkyl sulfosuccinates, C8-C20 acyl isethionate, C8-C20 alkyl ether phosphates, C8-C20 sarcosinates and combinations thereof.

[0041] Sunscreen actives may also be included in compositions of the present invention. Particularly preferred are such materials as ethylhexyl p-methoxycinnamate, available as Parsol MCX®, Avobenzene, available as Parsol 1789® and benzophenone-3, also known as Oxybenzone. Inorganic sunscreen actives may be employed such as microfine titanium dioxide, zinc oxide, polyethylene and various other polymers. Amounts of the sunscreen agents when present may generally range from 0.1 to 30%, preferably from 2 to 20%, optimally from 4 to 10% by weight.

[0042] Preservatives can desirably be incorporated into the cosmetic compositions of this invention to protect against the growth of potentially harmful microorganisms. Suitable traditional preservatives for compositions of this invention are alkyl esters of para-hydroxybenzoic acid. Other preservatives which have more recently come into use include hydantoin derivatives, propionate salts, and a variety of quaternary ammonium compounds. Cosmetic chemists are familiar with appropriate preservatives and routinely choose them to satisfy the preservative challenge test and to provide product stability. Particularly preferred preservatives are phenoxyethanol, methyl paraben, propyl paraben, imidazolidinyl urea, sodium dehydroacetate and benzyl alcohol. The preservatives should be selected having regard for the use of the composition and possible incompatibilities between the preservatives and other ingredients in the emulsion. Preservatives are preferably employed in amounts ranging from 0.01% to 2% by weight of the composition.

[0043] Compositions of the present invention may include vitamins. Illustrative vitamins are Vitamin A (retinol), Vitamin B2, Vitamin B6, Vitamin C, Vitamin E and Biotin. Derivatives of the vitamins may also be employed. For instance, Vitamin C derivatives include ascorbyl tetraisopalmitate, magnesium ascorbyl phosphate and ascorbyl glycoside. Derivatives of Vitamin E include tocopheryl acetate, tocopheryl palmitate and tocopheryl linoleate. DL-panthenol and derivatives may also be employed. Total amount of vitamins when present in compositions according to the present invention may range from 0.001 to 10%, preferably from 0.01% to 1%, optimally from 0.1 to 0.5% by weight.

[0044] Another type of useful substance can be that of an enzyme such as oxidases, proteases, lipases and combinations. Particularly preferred is superoxide dismutase, commercially available as Biocell SOD from the Brooks Company, USA.

[0045] Skin lightening compounds may be included in the compositions of the invention. Illustrative substances are placental extract, lactic acid, niacinamide, arbutin, kojic acid, ferulic acid, resorcinol and derivatives including 4-substituted resorcinols and combinations thereof. Amounts of these agents may range from about 0.1 to about 10%, preferably from about 0.5 to about 2% by weight of the compositions.

[0046] Desquamation promoters may be present. Illustrative are the alpha-hydroxycarboxylic acids and beta-hydroxycarboxylic acids. The term “acid” is meant to include not only the free acid but also salts and C1-C30 alkyl or aryl esters thereof and lactones generated from removal of water to form cyclic or linear lactone structures. Representative acids are glycolic, lactic and malic acids. Salicylic acid is representative of the beta-hydroxycarboxylic acids. Amounts of these materials when present may range from about 0.1 to about 15% by weight of the composition.

[0047] A variety of herbal extracts may optionally be included in compositions of this invention. Illustrative are green tea, chamomile, licorice and extract combinations thereof. The extracts may either be water soluble or water-insoluble carried in a solvent which respectively is hydrophilic or hydrophobic. Water and ethanol are the preferred extract solvents.

[0048] Also included may be such materials as lipoic acid, retinoxytrimethylsilane (available from Clariant Corp. under the Silcare 1M-75 trademark), ceramides (including Ceramide 1, Ceramide 3, Ceramide 3B and Ceramide 6), dehydroepiandrosterone (DHEA) and combinations thereof. Amounts of these materials may range from about 0.000001 to about 10%, preferably from about 0.0001 to about 1% by weight.

[0049] Colorants, fragrances, opacifiers and abrasives may also be included in compositions of the present invention. Each of these substances may range from about 0.05 to about 5%, preferably between 0.1 and 3% by weight.

[0050] The term “comprising” is meant not to be limiting to any subsequently stated elements but rather to encompass non-specified elements of major or minor functional importance. In other words the listed steps, elements or options need not be exhaustive. Whenever the words “including” or “having” are used, these terms are meant to be equivalent to “comprising” as defined above.

[0051] Except in the operating and comparative examples, or where otherwise explicitly indicated, all numbers in this description indicating amounts of material ought to be understood as modified by the word “about”.

[0052] The following examples will more fully illustrate the embodiments of this invention. All parts, percentages and proportions referred to herein and in the appended claims are by weight unless otherwise illustrated.

EXAMPLE 1

[0053] A clinical study was conducted to compare ammonium malonate to ammonium glycolate as active cosmetic ingredients. The base formula for the comparative experiments is outlined under Table I.

TABLE I
INGREDIENT                       WEIGHT %
PHASE A
Water                            Balance
Disodium EDTA                    0.05
Methyl Paraben                   0.15
Magnesium Aluminum Silicate      0.60
Triethanolamine                  1.20
PHASE B
Xanthan Gum                      0.20
Natrosol ® 250HHR (ethyl cellulose) 0.50
Butylene Glycol                  3.00
Glycerin                         2.00
PHASE C
Sodium Stearoyl Lactylate        0.10
Glycerol Monostearate            1.50
Stearyl Alcohol                  1.50
Isostearyl Palmitate             3.00
Silicone Fluid                   1.00
Cholesterol                      0.25
Sorbitan Stearate                1.00
Butylated Hydroxy Toluene        0.05
Vitamin E Acetate                0.01
PEG-100 Stearate                 2.00
Stearic Acid                     3.00
Propyl Paraben                   0.10
Parsol MCX ®                     2.00
Caprylic/Capric Triglyceride     0.50
Hydroxycaprylic Acid             0.01
C12-15 Alkyl Octanoate           3.00
PHASE D
Active                           —
PHASE E
Vitamin A Palmitate              0.10
Bisabolol                        0.01
Vitamin A Acetate                0.01
Fragrance                        0.03
Retinol 50C                      0.02

[0054] The total formulations with ammonium glycolate and ammonium malonate active are identified in the Tables below as “PADC” and “Ammonium”. The PADC product is a state of the art alpha hydroxy acid formula which is currently in the market. This formula contains 8% Glycolic acid or 0.1053 equivalents, neutralized with 2.4% ammonia hydroxide which is 0.0395 equivalents, resulting in a final formula pH of 3.8. The ammonium formula contains 5.04% malonic acid or 0.0969 equivalents, neutralized with 1.87% ammonia which is 0.0311 equivalents, resulting in a final formula pH of 3.6-4.0. This resulted in Malonic acid being 31.87% neutralized by the amine. The clinical involved (49) panelists over a six week period. Panelists were required to apply each product to one half of their face. After application, the panelists were required to answer a series of questions regarding relative effectiveness of the products.

TABLE II
Products:
PADC & Ammonium	Week 1 (n = 49)	Week 3 (n = 49)	Week 6 (n = 47)
Malonate pH 3.6-4.0	PADC	Ammonium	no pref	PADC	Ammonium	no pref	PADC	Ammonium	No pref
Absorbed more easily	31	39	30	35	29	37	30	23	47
Felt less greasy	26	43	31	31	33	37	30	30	40
Felt lighter	33	39	28	35	35	31	32	34	34
Left skin feeling softer	24	22	54	29	18	53	30 15	55
Was milder	20	37	43	29	20	51	28	26	45
Left skin feeling	24	22	54	29	12	59	32	13	55
smoother
Left skin looking	22	15	63	27	14	59	28	19	53
smoother
Moisturized better	28	26	46	33	14	53	21	13 66
Helped to look	26	22	52	22	16	61	26	15	59
firmer/tighter
Helped to feel	19	13	69	22	10	67	23	13	64
healthier
Helped to feel	24	24	52	22	25	53	25	19	57
firmer/tighter
Improved skin tone	20	11	69	22	12	65	24	17	59
better
Made skin look better	20	17	63	25	10	65	25	13	62
Improved condition	20	19	61	20	16	63	28	15	57
better
Helped to look	20	13	67	20	14	65	23	11	66
younger
Left skin more radiant	17	17	67	14	12	74	13	15	72
Was less irritating	23	36	41	26	25	49	28	30	42
Was evening out	15	9	76	18	10	71	21	9	70
tone/texture
Firmed skin better	24	19	57	20	20	59	28	19	53

[0055]

Overall preference
Products:
PADC & Ammonium	Week 1	Week 3	Week 6
Malonate pH 3.6-4.0	PADC	Ammonium	no pref	PADC	Ammonium	no pref	PADC	Ammonium	No pref
Overall Preference	41	33	26	35	37	29	36	34	30

[0056] Based on the results of the clinical evaluations, it is evident that ammonium malonate is nearly as effective as ammonium glycolate, the well-known, but irritation inducing active, in respect of improving the general condition of skin.

[0057] Additionally, a further more extensive clinical found that ammonium malonate was considerably less irritating than the ammonium glycolate composition. Results of that study are summarized in the Table below. The products evaluated herein were identical to those fielded in the first clinical study.

Overall skin Problems Experienced
	Week 1	Week 4	Week 8
Prod-		Ammon.		Ammon.		Ammon.
ucts	PADC	Malonate	PADC	Malonate	PADC	Malonate
Yes	24%	11%	10%	5%	9%	5%
No	76%	89%	90%	95%	91%	95%

[0058] The types of skin problems experienced that were recorded included any redness/splotches, pimples/breakouts/acne, tingling, burning, dryness, stinging, itching, irritation/discomfort, bumps, rash, peeling, puffiness, flaking, tightness, blotchiness, blisters/blistering and any other similar manifestation. Approximately 100 panelists were used in this clinical. It is evident that in the first week of use, the ammonium malonate is much less discomforting to the face than the ammonium glycolate. After several weeks of use, the panelists became acclimated and the difference between the materials became less although still discernible.

EXAMPLE 2

[0059] A water-in-oil topical liquid make-up foundation utilizing the malonate salts of the present invention is described in Table IV below.

TABLE IV
INGREDIENT                  WEIGHT %
PHASE A
Cyclomethicone              9.25
Cetyl Octanoate             2.00
Dimethicone Copolyol        20.00
PHASE B
Talc                        3.38
Pigment (Iron Oxides)       10.51
Spheron L-1500 (Silica)     0.50
PHASE C
Synthetic Wax Durachem 0602 0.10
Arachidyl Behenate          0.30
PHASE D
Cyclomethicone              1.00
Trihydroxystearin           0.30
PHASE E
Laureth-7                   0.50
Propyl Paraben              0.25
PHASE F
Fragrance                   0.05
PHASE G
Water                       balance
Ammonium Malonate           3.00
Methyl Paraben              0.12
Propylene Glycol            8.00
Niacinamide                 4.00
Glycerin                    3.00
Sodium Chloride             2.00
Sodium Dehydroacetate       0.30

EXAMPLE 3

[0060] Illustrated herein is a skin cream incorporating the malonate salts of the present invention.

TABLE V
INGREDIENT            WEIGHT %
Glycerin              6.93
Niacinamide           5.00
Ammonium Malonate     5.00
Permethyl 101A1       3.00
Sepigel 3052          2.50
Q2-14033              2.00
Isopropyl Isostearate 1.33
Arlatone 21214        1.00
Cetyl Alcohol CO-1695 0.72
SEFA Cottonate5       0.67
Tocopherol Acetate    0.50
Panthenol             0.50
Stearyl Alcohol       0.48
Titanium Dioxide      0.40
Disodium EDTA         0.10
Glydant Plus6         0.10
PEG-100 Stearate      0.10
Stearic Acid          0.10
Purified Water        Balance
1Isohexadecane, Presperse Inc., South Plainfield, NJ
2Polyacrylamide(and)C13-14 Isoparaffin(and) Laureth-7, Seppic Corporation, Fairfield, NJ
3dimethicone(and)dimethiconol, Dow Corning Corp. Midland, MI
4Sorbitan Monostearate and Sucrococoate, ICI Americas Inc., Wilmington, DE
5Sucrose ester of fatty acid
6DMDM Hydantoin (and) Iodopropynyl Butylcarbamate, Lonza Inc., Fairlawn, NJ

EXAMPLE 4

[0061] Illustrative of a powdered cosmetic composition according to the present invention is the formula of Table VI.

TABLE VI
INGREDIENT                       WEIGHT %
Polysilicone-11                  22.5
Cyclomethicone                   54
Petrolatum                       11
Ammonium Malonate (50% in water) 7
Dimethicone Copolyol             0.5

EXAMPLE 5

[0062] A relatively anhydrous composition according to the present invention is reported in Table VII.

TABLE VII
INGREDIENT                       WEIGHT %
Cyclomethicone                   80.65
Dimethicone                      9.60
Squalane                         6.00
Isostearic Acid                  1.90
Borage Seed Oil                  0.90
Ammonium Malonate (50% in water) 0.50
Retinyl Palmitate                0.25
Ceramide 6                       0.10
Tocopherol                       0.10

EXAMPLE 6

[0063] An aerosol packaged foaming cleanser suitable for the present invention is outlined in Table VIII.

TABLE VIII
INGREDIENT                       WEIGHT %
Sunflower Seed Oil               20.00
Maleated Soybean Oil             5.00
Silicone Urethane                1.00
Polyglycero-4 Oleate             1.00
Sodium C14-16 Olefin Sulfonate   15.00
Sodium Lauryl Ether Sulphate (25% active) 15.00
Cocoamidopropylbetaine           15.00
DC 1784 ® (Silicone Emulsion 50%) 5.00
Polyquaternium-11                1.00
Ammonium Malonate                1.00
Water                            Balance

[0064] An aerosol is prepared using 92% by weight of the concentrate in Table VIII and 8% propellant, the latter being a combination of dimethylether, isobutane and propane.

EXAMPLE 7

[0065] An adhesive cosmetic patch may also be formulated according to the present invention. An adhesive hydrogel is prepared by mixing 30 grams of 2-acrylamido-2-methylpropane sulphonic acid monomer in 20 grams distilled water and 5 grams of a 1% aqueous solution of methylene-bis-acrylamide. The solution is then activated with 0.4% magnesium persulphate catalyst. Shortly after mixing the catalyst with the hydroget solution, 0.1 grams ammonium malonate in 5 ml water is added. The resultant solution is coated onto a 50/50 blend of polypropylene and hydrophilic polyester and allowed to solidify. The resulting deposited hydrogel is warmed for 24 hours at 40° C. in a hot air oven. Final water content of the hydrogel is 50%. A polystyrene backing layer is laid over the adhesive hydrogel.

EXAMPLE 8

[0066] A disposable, single use personal towelette product is described according to the present invention. A 70/30 polyester/rayon non-woven towetette is prepared with a weight of 1.8 grams and dimensions of 15 cm by 20 cm. Onto this towelette is impregnated a composition as outlined in Table IX below.

TABLE IX
INGREDIENT                     WEIGHT %
Ammonium Malonate              7.50
Glycerin                       2.00
Hexylene Glycol                2.00
Disodium Capryl Amphodiacetate 1.00
Gluconolactone                 0.90
Silicone Microemulsion         0.85
Witch Hazel                    0.50
PEG-40 Hydrogenated Castor Oil 0.50
Fragrance                      0.20
Vitamin E Acetate              0.001
Water                          Balance

[0067] The foregoing description and examples illustrate selected embodiments of the present invention. In Light thereof variations and modifications will be suggested to one skilled in the art, all of which are within the spirit and purview of this invention.

Claims

1. A cosmetic composition comprising: (i) from about 0.0001 to about 30% by weight of a salt which is an amine neutralized malonic acid; (ii) from about 1 to about 99.9% by weight of a cosmetically acceptable carrier; wherein the composition has a pH ranging from about 1.8 to 6.5.

2. The composition according to claim 1 wherein the amine is ammonia.

3. The composition according to claim 1 wherein the malonic acid is present as a half neutralized and a fully neutralized acid in a molar ratio ranging from about 1000:1 to about 1:1000, respectively.

4. The composition according to claim 3 wherein the molar ratio is about 2:1 to about 1:200.

5. The composition according to claim 1 wherein the pH ranges from about 3 to about 5.5.

6. A method for controlling signs of aging including those selected from the group consisting of fine lines, wrinkles, sagging skin, poor tone and age spots, comprising providing a cosmetic composition comprising: (i) from about 0.0001 to about 30% by weight of a salt which is an amine neutralized malonic acid; (ii) from about 1 to about 99.9% by weight of a cosmetically acceptable carrier; wherein the composition has a pH ranging from about 1.8 to 6.5.