POWDER COSMETIC COMPOSITION, USES AND PROCESS FOR THE PREPARATION THEREOF

Abstract

A powder cosmetic composition may include the following components (percentages-by-weight refer to a total weight of the components (a), (b), and (c)): (a) greater than or equal to 60%-by-weight and less than or equal to 95%-by-weight of an effervescent system including at least one carbonate or bicarbonate salt of alkaline metal or alkaline earth metal capable of reacting with at least one acid component, when exposed to water, to develop gas; (b) greater than or equal to 1%-by-weight and less than or equal to 35%-by-weight of at least one solid surfactant; and/or (c) greater than or equal to 0.05%-by-weight and less than or equal to 5%-by-weight of at least one composite powder including particles of a crosslinked organosiloxane polymer supporting silica particles on a surface of the crosslinked organosiloxane polymer.

Claims

1. A powder cosmetic composition, comprising the following components (percentages-by-weight refer to a total weight of the components (a), (b), and (c)): (a) greater than or equal to 60%-by-weight and less than or equal to 95%-by-weight of an effervescent system comprising at least one carbonate or bicarbonate salt of alkaline metal or alkaline earth metal capable of reacting with at least one acid component, when exposed to water, to develop gas; (b) greater than or equal to 1%-by-weight and less than or equal to 35%-by-weight of at least one solid surfactant; and (c) greater than or equal to 0.05%-by-weight and less than or equal to 5%-by-weight of at least one composite powder consisting of particles of crosslinked organosiloxane polymer supporting silica particles on a surface of the crosslinked organosiloxane polymer.

2. The composition of claim 1, wherein the crosslinked organosiloxane polymer is a crosslinked silicone elastomer.

3. The composition of claim 1, wherein the crosslinked organosiloxane polymer is a dimethicone/vinyl dimethicone copolymer.

4. The composition of claim 1, wherein the at least one composite powder is present in an amount greater than or equal to 0.1%-by-weight and less than or equal to 1%-by-weight.

5. The composition of claim 1, wherein the silica particles are amorphous silica particles.

6. The composition of claim 1, wherein the at least one solid surfactant is an anionic surfactant.

7. The composition of claim 6, wherein the at least one solid anionic surfactant comprises one or more of: polyalkylene glycol ethers of fatty alcohols, taurates, acyl lactilates, sodium stearoyl lactylate, alkyl sulfates, sodium lauryl sulfate, polyoxyethylenated alkyl sulphates, alkyl ether sulfate, monoethanolamine lauryl ether sulphate, alkyl ethers carboxylate, monoalkyl phosphate, dialkyl phosphate, arginine mono-(2-esyl decyl) phosphate, ethoxylated alkyl phosphate, N-acyl sarcosinate, sodium lauroyl sarcosinate, sodium myristoyl sarcosinate, N-acylglutamate, sodium lauroyl glutamate, acetyl isethionate, sodium cocoyl isethionate, polysorbate, potassium laurate, potassium myristate, potassium palmitate, potassium stearate, or mixtures thereof.

8. The composition of claim 6, wherein the at least one solid anionic surfactant comprises: sodium lauryl sulfosuccinate and sodium cocoyl isethionate.

9. The composition of claim 1, further comprising at least one powder filler.

10. The composition of claim 1, further comprising one or more: fragrances, preservatives, pigments, dyes, antioxidants, rheology modifiers, pH regulators, sequestering agents, conditioning agents, colorants, cosmetic active principles, dermatological active principles, trichological active principles, or mixtures thereof.

11. The composition of claim 1 in a form of self-supporting compact powder.

12. A method for cleansing and/or cosmetically caring skin and/or hair, the method comprising: hydrating the powder cosmetic composition of claim 1 so as to form a foam; applying the foam to the skin and/or the hair; and rinsing the skin and/or the hair.

13. A process for preparing a powder cosmetic composition, the process comprising: mixing the following components (percentages-by-weight refer to a total weight of the components (a), (b), and (c)) in order to form the powder cosmetic composition: (a) greater than or equal to 60%-by-weight and less than or equal to 95%-by-weight of an effervescent system comprising at least one carbonate or bicarbonate salt of alkaline metal or alkaline earth metal capable of reacting with at least one acid component, when exposed to water, to develop gas; (b) greater than or equal to 1%-by-weight and less than or equal to 35%-by-weight of at least one solid surfactant; and (c) greater than or equal to 0.05%-by-weight and less than or equal to 5%-by-weight of at least one composite powder consisting of particles of a crosslinked organosiloxane polymer supporting silica particles on a surface of the crosslinked organosiloxane polymer.

14. The process of claim 13, further comprising: compacting the powder cosmetic composition in order to obtain a cosmetic composition in a self-supporting compact form.

15. The composition of claim 1, wherein the at least one composite powder is present in an amount greater than or equal to 0.15%-by-weight and less than or equal to 0.5%-by-weight.

16. The composition of claim 9, wherein the at least one powder filler is present in an amount greater than or equal to 1%-by-weight and less than or equal to 25%-by-weight.

17. The composition of claim 11, wherein the self-supporting compact powder is in the form of a tablet or bar.

18. The process of claim 14, wherein the self-supporting compact form is a tablet or bar.

19. The composition of claim 1, wherein the at least one solid surfactant comprises sodium cocoyl isethionate.

20. The composition of claim 1, wherein the at least one solid surfactant comprises sodium lauryl sulfosuccinate.

Description

EXAMPLE

[0097] A cosmetic composition was prepared for the cleansing and care of the skin starting from a base composition having the following composition in weight percentage:

TABLE-US-00001 (a1) sodium bicarbonate (Effersoda) 58.0% (a2) anhydrous citric acid E330 29.0% (b1) sodium lauryl sulfosuccinate 5.2% (anionic surfactant, Plantapon SUS BASF) (b2) sodium cocoyl isethionate 7.5% (anionic surfactant, Jordapon CL Powder, BASF) (c) composite powder 0.3% (dimethicone/vinyl dimethicone/silica copolymer, Dow Corning 9701).

[0098] The cosmetic composition also contains a fragrance in powder form (2.0% by weight with respect to the weight of the base composition) and zinc oxide as filler (2.0% by weight with respect to the weight of the base composition).

[0099] The effervescent system in powder form (sodium bicarbonate and citric acid) was mixed in a mixing mill at about 1500 rpm for 2 minutes. At the end of the mixing, the remaining ingredients of the composition were introduced into the mixing mill. The mixing was re-started and continued for 4 minutes.

[0100] The composition was then discharged from the mixing mill and compacted in the form of discoid tablets (1.5 g each) using a hydraulic tablet press and applying a pressure of 40 bar.

[0101] The tablets thus obtained can be used, after hydration, for cleansing and/or cosmetically caring the skin. The quantity of composition is suitable for a single treatment for the face or hands.