SUBSTRATE-BASED PRODUCT, ITS METHOD OF PREPARATION AND COSMETIC USES THEREOF

Abstract

The present invention concerns a substrate-based product comprising a water-insoluble substrate, at least one chemical exfoliator, and at least one skin binding agent, its method of preparation and its cosmetic uses.

Claims

1. A substrate-based product comprising: a water-insoluble substrate, at least one chemical exfoliator, and at least one skin binding agent.

2. The substrate-based product according to claim 1, said substrate-based product being a cosmetic mask, preferably a cosmetic skin mask.

3. The substrate-based product according to claim 2, said substrate-based product being a cosmetic face mask.

4. The substrate-based product according to claim 1, wherein the skin binding agent is a water soluble polymer.

5. The substrate-based product according to claim 1, wherein the skin binding agent is selected from the group consisting of: vegetable starches, casein, gelatin, polyacrylamides, polyvinylalcohol, polyacrylic acid, polyamines, polyethyleneimines, polyvinylpyrrolidone copolymers (PVP), polyethylene glycols, cellulose and its derivatives, xanthan gum, agar gum, pectin gum, guar gum and their derivatives, carboxypolymethylene, and their mixtures.

6. The substrate-based product according to claim 1, wherein the chemical exfoliator is selected from the group consisting of: hydroxyacids, ascorbic acid and its derivatives, allantoin glycolate, allantoin mandelate, allantoin lactate, allantoin citrate, glucosamine mandelate, glucosamine ascorbate, glucosamine citrate, glucosamine phytate, glucosamine salicylate, glucosamine hydronate, creatinine lactate, creatinine glycolate, creatinine hydroxycitrate, creatinine citrate, niacinamide glycolate, niacinamide citrate, niacinamide salicylate, pyridoxine lactate, pyridoxine glycolate, pyridoxine malate, pyridoxine salicylate, chitosan lactate, chitosan citrate, chitosan malate, and their mixtures.

7. The substrate-based product according to claim 1, wherein the chemical exfoliator is selected from the group consisting of: ascorbic acid, glycolic acid, lactic acid, malic acid, mandelic acid, tartaric acid, citric acid, salicylic acid, and their mixtures.

8. The substrate-based product according to claim 1, further comprising at least one skin care agent.

9. The substrate-based product according to claim 1, further comprising at least one physiologically acceptable excipient.

10. A method for preparing a substrate-based product as defined in claim 1, comprising a step of application of a preparation composition comprising at least one chemical exfoliator and at least one skin binding agent on a water-insoluble substrate.

11. A method of cosmetic care comprising the following steps: a) wetting with a physiologically acceptable aqueous composition at least one zone of the substrate-based product according to claim 1, b) applying the activated substrate-based product on at least one zone of skin, c) drying the activated substrate-based product, and d) removing the activated substrate-based product from the skin.

12. A kit comprising the substrate-based product as defined in claim 1, and a physiologically acceptable aqueous composition, optionally comprising at least one skin care agent.

13. The substrate-based product according to claim 2, wherein the skin binding agent is a water soluble polymer.

14. The substrate-based product according to claim 3, wherein the skin binding agent is a water soluble polymer.

15. The substrate-based product according to claim 2, wherein the skin binding agent is selected from the group consisting of: vegetable starches, casein, gelatin, polyacrylamides, polyvinylalcohol, polyacrylic acid, polyamines, polyethyleneimines, polyvinylpyrrolidone copolymers (PVP), polyethylene glycols, cellulose and its derivatives, xanthan gum, agar gum, pectin gum, guar gum and their derivatives, carboxypolymethylene, and their mixtures.

16. The substrate-based product according to claim 3, wherein the skin binding agent is selected from the group consisting of: vegetable starches, casein, gelatin, polyacrylamides, polyvinylalcohol, polyacrylic acid, polyamines, polyethyleneimines, polyvinylpyrrolidone copolymers (PVP), polyethylene glycols, cellulose and its derivatives, xanthan gum, agar gum, pectin gum, guar gum and their derivatives, carboxypolymethylene, and their mixtures.

17. The substrate-based product according to claim 4, wherein the skin binding agent is selected from the group consisting of: vegetable starches, casein, gelatin, polyacrylamides, polyvinylalcohol, polyacrylic acid, polyamines, polyethyleneimines, polyvinylpyrrolidone copolymers (PVP), polyethylene glycols, cellulose and its derivatives, xanthan gum, agar gum, pectin gum, guar gum and their derivatives, carboxypolymethylene, and their mixtures.

18. The substrate-based product according to claim 2, wherein the chemical exfoliator is selected from the group consisting of: hydroxyacids, ascorbic acid and its derivatives, allantoin glycolate, allantoin mandelate, allantoin lactate, allantoin citrate, glucosamine mandelate, glucosamine ascorbate, glucosamine citrate, glucosamine phytate, glucosamine salicylate, glucosamine hydronate, creatinine lactate, creatinine glycolate, creatinine hydroxycitrate, creatinine citrate, niacinamide glycolate, niacinamide citrate, niacinamide salicylate, pyridoxine lactate, pyridoxine glycolate, pyridoxine malate, pyridoxine salicylate, chitosan lactate, chitosan citrate, chitosan malate, and their mixtures.

19. The substrate-based product according to claim 3, wherein the chemical exfoliator is selected from the group consisting of: hydroxyacids, ascorbic acid and its derivatives, allantoin glycolate, allantoin mandelate, allantoin lactate, allantoin citrate, glucosamine mandelate, glucosamine ascorbate, glucosamine citrate, glucosamine phytate, glucosamine salicylate, glucosamine hydronate, creatinine lactate, creatinine glycolate, creatinine hydroxycitrate, creatinine citrate, niacinamide glycolate, niacinamide citrate, niacinamide salicylate, pyridoxine lactate, pyridoxine glycolate, pyridoxine malate, pyridoxine salicylate, chitosan lactate, chitosan citrate, chitosan malate, and their mixtures.

20. The substrate-based product according to claim 4, wherein the chemical exfoliator is selected from the group consisting of hydroxyacids, ascorbic acid and its derivatives, allantoin glycolate, allantoin mandelate, allantoin lactate, allantoin citrate, glucosamine mandelate, glucosamine ascorbate, glucosamine citrate, glucosamine phytate, glucosamine salicylate, glucosamine hydronate, creatinine lactate, creatinine glycolate, creatinine hydroxycitrate, creatinine citrate, niacinamide glycolate, niacinamide citrate, niacinamide salicylate, pyridoxine lactate, pyridoxine glycolate, pyridoxine malate, pyridoxine salicylate, chitosan lactate, chitosan citrate, chitosan malate, and their mixtures.

Description

DESCRIPTION OF THE FIGURES

[0122] FIG. 1 represents the percentage of evolution of the “a” value, considered as a representation of erythema, in function of the time after removal from the skin.

[0123] FIG. 2 represents the percentage of evolution of the lightness of the skin “L”, in function of the time after removal from the skin.

[0124] “T-imm” refers to the time at which the substrate-based product was removed from the skin, after 15 minutes of application.

[0125] Throughout the application, the term “comprising a” or “including a” means “comprising at least one” or “including at least one”, unless otherwise specified.

[0126] Throughout the above description, unless specified otherwise, the term “between x and y” refers to an inclusive range, i.e. the values x and y are included in the range.

[0127] The invention will now be illustrated in the following non-limiting examples. Unless specified otherwise, the % are expressed by weight in relation to the total weight of the composition.

EXAMPLES

Example 1

[0128] 1. Preparation of a Substrate-Based Product According to the Invention:

A preparation composition was prepared as follows:

TABLE-US-00001 Ingredient % by weight Ascorbic Acid 15 Polyvinylpyrrolidone 30 Ferulic Acid 0.5 Water 54.5 Total 100

[0129] The preparation composition was coated using a knife on roll doctor blade coating system, well-known by the skilled person in the art, on non-woven viscose and dried at 60 C.° by hot air drying technique.

[0130] 2. Comparative Test:

[0131] The substrate-based product obtained as described above was cut into the size of 2×2 inches patches and wetted with 0.5 gram of water in order to obtain an activated substrate-based product (mentioned as Product A in FIGS. 1 and 2).

[0132] These activated substrate-based products were applied on forearm of 16 users for 15 minutes. After 15 minutes, patches were removed and color measurements were taken using a spectrometer (model n.sup.o CM 2600D from Konica Minolta).

[0133] Corresponding preparation compositions (mentioned as Product B in FIGS. 1 and 2) were also applied directly on forearm of users, on 2×2 inches area for 15 minutes and were after rinsed off with water.

[0134] The results are shown in FIGS. 1 and 2.

[0135] Both FIGS. 1 and 2 represent a percentage of evolution, respectively of value a and L. “a” value represents the redness of the skin and “L” the lightness of the skin, measured directly by the spectrometer.

[0136] The percentage of evolution is the average of measurements of the treated area (product) minus the average of measurements for non-treated area (bare skin), calculated as follows:

[00001]$\mathrm{Percentage}.Math..Math.\mathrm{Evolution}=\frac{\left(T_{n-\mathrm{product}}-T_{0-\mathrm{product}}\right)}{T_{0-\mathrm{product}}}-\frac{\left(T_{n-\mathrm{bareskin}}-T_{0-\mathrm{bareskin}}\right)}{T_{n-\mathrm{bareskin}}}\times 100.Math.\%$

[0137] FIG. 1 shows that product A gives a higher negative “a” percentage of evolution than product B, meaning that when the substrate-based product according to the invention is used, it shows higher efficacy than the preparation composition alone, in terms of reducing redness of the skin.

[0138] FIG. 2 shows that product A gives a higher “L” percentage of evolution than product B meaning that when the substrate-based product according to the invention is used, it shows higher efficacy than the preparation composition alone, in terms of lightening of the skin, even 4 hours after application.

[0139] FIGS. 1 and 2 show that use of the substrate-based product according to the invention reduce the value of erythema, the redness of the skin and enhances the lightness value.