MXPA01003828A - Cream cleanser with high levels of emollients and glycerin - Google Patents

Abstract

A cleansing composition comprising:(A) glycerin;(B) one or more emollients;(C) a first surfactant comprising a salt of cocoyl isethionate;(D) a second surfactant where said second surfactant comprises one or more members of the group consisting on an anionic surfactant, an alkyl phosphate, a salt of an alkyl phosphate, and an amphoteric surfactant;and (E) water.

Description

CREAM CLEANER WITH HIGH LEVELS OF EMOLLIENTS AND GLYCERIN • FIELD OF THE INVENTION This invention relates to anhydrous cream cleanser formulations which exhibit good aesthetic, spreading and foaming characteristics. These cleaners also demonstrate stability during aging. • 10 BACKGROUND OF THE INVENTION A mild deposition cleaner is described in Ramírez et al., U.S. Patent. No. 5,409,706. This cleaner includes a mixture of agent surfactant and essentially anhydrous oil dispersed in a continuous glycerin phase. This formulation exhibits poor aesthetics during use such as, for example, poor spreading of the cream when brought into contact with water, which leads to poor performance attributes during use for the consumer. Another deficiency is the low amount of foam.

This cleanser also exhibits poor stability because the cream frequently exhibits syneresis of both oils (lipophilic on top of the cream) and glycerin (on the bottom). Even when left at room temperature for relatively short periods, samples of the cream in tube exude clear liquids. High levels of Carbopol are necessary to maintain stability even in the short term. The present inventors have discovered a cleanser formulation that overcomes these deficiencies.

BRIEF DESCRIPTION OF THE INVENTION The invention includes a cleaning composition comprising: (A) glycerin; (B) one or more emollients; (C) a first surfactant comprising a cocoyl isethionate salt; (D) a second surfactant, wherein said second surfactant comprises one or more members of the group consisting of an anionic surfactant, an alkyl phosphate, a salt of an alkyl phosphate, and an amphoteric surfactant; and (E) water. The composition may further comprise: (F) a polymeric thickener.

DETAILED DESCRIPTION OF THE INVENTION The present inventors have discovered cleaning compositions with improved foam, stability and aesthetic characteristics. These compositions comprise glycerin; one or more emollients; a first surfactant; a second surfactant, wherein said second surfactant comprises one or more members of the group consisting of an anionic surfactant, an alkyl phosphate, a salt of an alkyl phosphate and an amphoteric surfactant; and water. Glycerin is used in the compositions of the invention, and is present in percent by weight, based on 100 percent by weight of the total composition. Typically, the glycerin is present in an amount ranging from about 30 to about 60% by weight, preferably from about 35 to about 50% by weight, and more preferably from about 45 to about 46% by weight. Emollients suitable for use in the compositions of the invention include, but are not limited to, petrolatum; mineral oils; soy oil; and esters such as, for example, isopropyl myristate, isopropyl palmitate, 1-decene (hydrogenated) polymer, C ?2-C-5 alkyl benzoate (also known as C12-15 benzoate alcohol under the trademark Finisolv TN), and esters of alkyl benzoate of C? 2-C-t5. Typically, said one or more emollients comprise C-? 2-Ci5 alkyl benzoate and at least some other emollient selected from the group consisting of petrolatum, mineral oils and soybean oil. Said one or more preferred emollients are a mixture of C-? 2- C-5 alkyl benzoate and petrolatum. Said one or more particularly preferred emollients comprise C-? 2-C-5 alkyl benzoate in an amount of from about 1 to about 12% by weight, more preferably about 2% from about 10%, based on the weight total of the composition, wherein the remainder of the weight of said one or more emollients comprises at least some other emollient. Typically, said one or more emollients are present, based on the total weight of the composition, in an amount ranging from about 20 to about 45% by weight, preferably from about 25 to about 35% by weight, and more preferably about 32% by weight. In the case of oil and ester emollients, a small amount of a microcrystalline wax may be added to produce a cosmetically acceptable cream. If used, the microcrystalline wax will be present, based on the total weight of the composition, in an amount of from about 4 to about 10% by weight. The first surfactant comprises a cocoyl isethionate salt which includes, but is not limited to, sodium or ammonium cocoyl isethionate. Typically, the cocoyl isethionate salts, based on the total weight of the composition, are present in an amount ranging from about 3 to about 19% by weight, preferably from about 5 to about 15% by weight, and more preferably about 7.2% by weight.

The second surfactant comprises one or more members of the group consisting of an anionic surfactant, an alkyl phosphate, a salt of an alkyl phosphate and an amphoteric surfactant. Typically, said second surfactant comprises a surfactant anionic and alkyl phosphate. Suitable anionic surfactants include, but are not limited to, sodium lauryl sulfate, sodium salts of fatty acid taurate, acyl glutamates, olefin sulfonates and sarcosinates such as, for example, sodium lauroyl sarcosinates. The preferred anionic surfactant is sodium lauryl sulfate. Suitable alkyl phosphates include, but are not limited to, C 9 -C 15 alkyl phosphates such as, for example, Arlatone concentrate.

MAP (ICI Surfactants-Wilmington, DE), laurylphosphatidic acid, known as Rhodafac DV4922 (Rhodia-NJ). The alkyl phosphates can be neutralized by neutralizing agents including, but not limited to, organic or inorganic bases, wherein the preferred neutralizing agent f > is triethanolamine. These components can be neutralized at a pH ranging from about 5 to about 8, preferably around 6. 5 to about 7.5, and more preferably about 6.8 to approximately 7.2. In addition to the alkyl phosphates, other components of the composition can be neutralized. Any component described as neutralized in this composition is neutralized using the neutralization agents described above, wherein the neutralized pH is as mentioned above. Preferred alkyl phosphates are monoalkyl phosphates, and salts thereof. Suitable amphoteric surfactants are betaines, wherein the preferred betaine is cocoamidopropyl betaine. The amount of the second surfactant included in the composition is typically an amount effective to increase the softness of the composition. Preferably, the weight ratio of the second surfactant: the cocoyl isethionate salt (first surfactant), ranges from about 1: 6 to about 1: 1, and the combination is about 8% by weight, based on 100% by weight of the total composition. Although the precise amount of the second surfactant used will depend on the particular surfactant used, it will normally be present in an amount ranging from about 1 to about % by weight, based on 100% by weight of the total composition. For example, the amount of sodium lauryl sulfate, when used as the second surfactant, will vary from about 1 to about 5% by weight, based on 100% by weight of the total composition. Of presence, the weight ratio of sodium lauryl sulfate: sodium cocoyl isethionate in the composition varies from about 1: 3 to about 1: 6. The effective amounts, based on 100% by weight of the total composition, of other secondary surfactants are the following: The water is present in an amount, based on the total weight of the composition, of 5% by weight, or more. Preferably, the amount of water varies from about 5 to about 20% by weight, and more preferably from about 5 to about 15% by weight, based on 100% by weight of the total composition. More preferably, the water is present in an amount, based on the total weight of the composition, of about 5% to about 12%. Other components may be added to the compositions of the invention. For example, suitable polymeric thickeners can be added. Such thickeners include, but are not limited to, such gums as xanthan gum, an acrylate / C10-C30 alkyl cross-linked polymer, such as that marketed under the trademark Carbomer by BF Goodrich-Cleveland-OH, and carboxypolymethylene polymers (Carbopol). Thickeners such as Carbomer can be neutralized using the neutralization agents described above. Preferably, the thickeners are present in an amount, based on the total weight of the composition, of from about 0.1% to about 0.7%, more preferably about 0.3%.

In addition to the above components, foam enhancers may be incorporated in the compositions of the present invention. Suitable foam enhancers include potassium polymetaphosphate, n-pentane, isopentane, sodium lauryl sulfoacetate, amides and sarcosinates. These materials will intensify the foam produced when the present compositions are exposed to water during use. The compositions of this invention may also contain additives such as fragrances, colorants, sugar and sugar derivatives, UV light stabilizers, antioxidants, preservatives, sunscreens, and ^ 10 similar, to improve the texture, appearance and perception of the compositions by the user. In addition, active ingredients can be incorporated into the present compositions. Such active ingredients include, but are not limited to, deodorants; medicines such as, for example, coal-tar, benzoyl peroxide, vitamin A and vitamin E, and derivatives thereof, such as, for example, retinol or tretinoin, and antibacterial agents such as, for example, triclosan, PVP-iodine and salicylic acid f. The compositions of the present invention can be formulated using cosmetic and pharmaceutical vehicles. The compositions 20 can be formulated in any vehicle which can be applied to human skin, wherein said vehicles include, but are not limited to, vapors, gels, liquids, creams, aerosols and oils. Typically, the compositions are formulated as creams, liquids or gels.

The compositions of the present invention are useful for delivering skin-improving active agents such as, for example, retinol. The delivery is typically by topical application to an animal, preferably a mammal, but more preferably a human in need of the active agent. Typical amounts administered will be effective amounts of the skin improving composition containing the active agent. In addition, the inventors have discovered that the foaming, stability and aesthetic characteristics of the cleaning compositions can be further improved, using one or more of the following steps, by adding a controlled amount of polymeric thickener to the cleaning compositions. , neutralizing the components of the cleaning compositions. Typically, the thickeners mentioned above can be added to the cleaning compositions at the scales described above. The components of the cleaning compositions can be neutralized using the neutralization agents and the amounts described above. The best cleaning compositions are prepared with thickeners and additional neutralized components. Still further, the inventors have discovered that the addition of low water levels to cleaning formulations with high concentrations of glycerin and emollients improves the foaming, stability and aesthetic characteristics of said cleaning formulations.

In addition to the cleaning compositions of the invention, the addition of low water levels to the cleaning formulations improves the aesthetics of foaming and the stability of said cleaning formulations. Typically, said cleaning formulations have glycerin present in an amount, based on the total weight of the formulation, ranging from about 30 to about 60% by weight, preferably from about 35 to about 50% by weight, and more preferably from about 45 to about about 46% by weight; and emollients present in an amount, based on the total weight of the formulation, ranging from about 10 to about 45% by weight, preferably from about 25 to about 35% by weight, and more preferably from about 32% by weight. These cleaning compositions are improved by the addition of water in an amount, based on the total weight of the total composition, of 5% by weight, or more. Preferably, the amount of water varies from about 5 to about 20% by weight, and more preferably from about 5 to about 15% by weight, based on 100% by weight of the total composition. More preferably, the water is present in an amount, based on the total weight of the composition, of about 5% to about 12%. Although the compositions of the present invention can be prepared by any method of rigorously mixing the ingredients, preferably, these compositions are prepared by high shear mixing. Preferably, the high shear mixing is continued through cooling to temperatures below the freeze scale of the emollients, to keep the oil phase dispersed along the freezing scale. For example, in the case of petrolatum, this cooling would be at a temperature below 45 ° C. The order of adding 5 components is not critical. Typically, the method for preparing the cleaning compositions of the invention comprises: (1) mixing glycerin and water; and (2) add emollients and surfactants to the glycerin and water mixture. All components and quantities do. glycerin, water, emollients and surfactants, are as described above. To illustrate the invention, the following example is included. These examples do not limit the invention. They are used only to suggest a method to practice the invention. Those well informed in the preparation of cleaning compositions, as well as other specialists, can find other methods for practicing the invention. However, it is considered that such methods are within the scope of this invention.

EXAMPLES EXAMPLE 1 Composition A was prepared from the ingredients included in Table A. Three phases, one glycerin phase, one oil phase, part A, and one oil phase, part B, were prepared separately and mixed to form the compositions.

Phase of glycerin Add glycerin to a suitable beaker and shake. Sieve in C10-C30 acrylate / alkylate cross-linked polymer, methylparaben, propylparaben and tetrasodium EDTA. Transfer to a homogenizer, and start to homogenize and heat up to 80 ° C. Shake until the polymer suspension is uniform (without evidence of fish eyes). Add water and adjust the temperature to 80 ° C. Neutralize with triethanolamine. Keep at 80 ° C and continue stirring in the homogenizer.

Oil phase, part A Add petrolatum to a beaker of adequate size, and start heating up to 80 ° C. When the petrolatum begins to soften and liquefy, begin to homogenize (low settling) with a Gifford wood homogenizer. Add laurylalkylphosphatidic acid and neutralize with 99% triethanolamine. Homogenize. Add the cocoyl sodium setionate and let soak in molten oils. Add sodium C14-16 olefin sulfonate and let soak in molten oils. Keep f stirring, homogenization and temperature at 80 ° C. Add polyphosphate potassium Maintain the agitation of the homogenizer and the temperature at 80 ° C. Add titanium dioxide and mix until uniform. Maintain the agitation of the homogenizer and the temperature at 80 ° C.

Oil phase, part B f 10 In a separate beaker, heat the C12-15 alkyl benzoate to 80 ° C. Add BHT to the C12-15 alkyl benzoate, mix and let dissolve, then add the soybean oil to the mixture, and allow to dissolve completely. Maintain at 75-80 ° C to introduce the Esco container in phases. 15 Esco Container < f Transfer the components of the oil phase, part A (80 ° C) to the Esco container, which is pre-set at 80 ° C. Start mixing with the agitator with side scraper at 20-40% of maximum speed 20 (actual speed of 35%). Extract a vacuum of -0.6 to -0.8 bars (actual vacuum = - 0.7 bars). Transfer the components of the glycerin phase (80 ° C) to a funnel hopper, and add to the glycerin phase to continue mixing. Mix with agitation for 5 minutes. Maintain a vacuum of -0.6 to -0.8 bars. Transfer the components of the oil phase, part B (80 ° C) to the Esco container, which is preset at 80 ° C. Turn on the homogenizer and homogenize for 10 minutes to 40% maximum. If necessary, adjust the vacuum from -0.6 to -0.8 bars, and keep the heat at 80 ° C for 10 to 15 minutes. Verify the batch visually for a uniform appearance. Maintain vacuum, with low to moderate agitation speed from 25 to 35 (actual speed = 30), and low speed from 20 to 25 (actual speed = 20), and cool the batch to 45 ° C. When the batch is at 45 ° C, turn off the homogenizer and keep stirring. Add the fragrance and leave mixing for 20 minutes at 40-45 ° C. Cool to 35 ° C with shaking, and fill into 118.28 ml x 59.14 ml containers.

TABLE A EXAMPLE 2 Composition B was prepared from the ingredients included f in Table B, by substantially the same method used in the composition A.

TABLE B • 10 fifteen EXAMPLE 3 The composition C was prepared from the ingredients included in Table C, by substantially the same method used in composition A.

TABLE C • • 10 EXAMPLE 4 Composition D was prepared from the ingredients included in Table D, by substantially the same method used in composition A.

• TABLE D • EXAMPLE 5 Composition E was prepared from the ingredients included in Table E, by substantially the same method used in the composition A. PICTURE E • twenty EXAMPLE 6 The composition F was prepared from the ingredients included in table F, by substantially the same method used in composition A.

TABLE F EXAMPLE 7 Composition G, an anhydrous composition, was prepared from the ingredients included in Table G, by substantially the same method used in composition A. This anhydrous composition lacks water in the glycerin phase.

• TABLE G • 10 EXAMPLE 8 The improved spreading of the cleaning compositions of the invention, compositions E and F, was demonstrated by comparing the viscosity of the compositions with the viscosity of the anhydrous formulation, composition G. Compositions were prepared and the initial viscosity was measured on a Brookfield DVI TF machine at 1.5 rpm. The results of the experiment are given in table H. The compositions were also compared empirically. Compositions E and F have good spreading, increased instantaneous foam, and generally better foaming properties than composition G. TABLE H

Claims (15)

NOVELTY OF THE INVENTION CLAIMS

1. - A cleaning composition, characterized in that it comprises: (A) glycerin; (B) one or more emollients; (C) a first surfactant comprising a cocoyl isethionate salt; (D) a second surfactant, wherein said second surfactant comprises one or more members selected from the group consisting of an anionic surfactant, an alkyl phosphate, an alkyl phosphate salt and an amphoteric surfactant; and (E) water.

2. The cleaning composition according to claim 1, further characterized in that it comprises (F) a polymeric thickener.

3. The cleaning composition according to claim 1, further characterized in that said one or more emollients are selected from the group consisting of petrolatum, mineral oils, soybean oil, isopropyl myristate, isopropyl palmitate, polymer of 1 -deceno (hydrogenated), C12-C-15 alkyl benzoate and C-C2-C15 alkyl benzoate esters.

4. The cleaning composition according to claim 1, further characterized in that said cocoyl isethionate salt is selected from the group consisting of ammonium cocoyl isethionate and sodium cocoyl isethionate.

5. The cleaning composition according to claim 1, further characterized in that said second agent The surfactant further comprises an anionic surfactant and an alkyl phosphate.

6. The cleaning composition according to claim 5, further characterized in that said anionic surfactant is selected from the group consisting of sodium lauryl sulfate, sodium salts of fatty acid taurate, acyl glutamates, olefin sulphonates and sarcosinates; and said alkyl phosphate is selected from the group consisting of C9-C15 alkyl phosphates and laurylphosphatidic acid.

7. The composition of impieza according to claim 6, further characterized in that said alkyl phosphate is neutralized at a pH ranging from about 5 to about 8.

8. The cleaning composition in accordance with the claim 2, further characterized in that the glycerin is present in an amount of about 45 to about 46 weight percent; said one or more emollients are present in an amount of 32 by 20 weight percent; said first surfactant is present in an amount of about 7.2 weight percent; said second surfactant is present in an amount of from about 1.2 percent to about 3.2; water is present in an amount of about 5 percent to 12 percent; and said polymeric thickener is present in an amount of from about 0.1 percent to about 0.7 percent.

9. The cleaning composition according to claim 2, further characterized in that it comprises a foam enhancer, active skin improving agents and active ingredients.

10. The cleaning composition according to claim 8, further characterized in that said second surfactant comprises an anionic surfactant and an alkyl phosphate.

11. The cleaning composition according to claim 10, further characterized in that said alkyl phosphate and said polymeric thickener are neutralized.

12. The cleaning composition according to claim 10, further characterized in that said one or more emollients comprise C-? 2-C-? 5 alkyl benzoate and petrolatum; said first surfactant is sodium cocoyl isethionate; said second surfactant is sodium lauryl sulfate and an alkyl phosphate; and said polymeric thickener is an acrylate / C10-C30 alkyl cross-linked polymer.

13. A method for preparing cleaning compositions, characterized in that it comprises (1) mixing glycerin and water; and (2) adding emollients and surfactants to the mixture of glycerin and water.

14. - The method according to claim 13, further characterized in that the emollients and the surfactants are mixed before they are added to the mixture of glycerin and water.

15. The method according to claim 13, further characterized in that all components are mixed by high shear mixing. • •