ES1223419U - DEPILATORY COMPOSITION (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

A depilatory composition in the form of a colloidal gel comprising at least: - a depilatory agent which is a salt of thioglycolic acid, in an amount between 2.5% and 7.15% by weight of depilatory agent with respect to the total weight of the composition; - at least one gelling agent, in an amount comprised between 1% and 3% by weight of the total weight of the composition; - a pH regulating agent which is one or more hydroxides, independently selected from the group consisting of potassium hydroxide, sodium hydroxide, calcium hydroxide and lithium hydroxide; in an amount comprised between 2.75% and 4% by weight of the total weight of the composition; - a pH buffer agent; - a perfuming agent; - at least one extract of plant origin; - at least one colorant; - at least one solubilizing agent; and - Water. (Machine-translation by Google Translate, not legally binding)

Description

DESCRIPTION

DEPILATORY COMPOSITION

Object and technical sector of the invention

The invention is directed to a depilatory composition, which is in particular in the form of a gel, and more especially in the form of a colloidal gel.

BACKGROUND OF THE INVENTION

Multiple different compositions are known to eliminate superfluous body hair. One type of composition, the most common, requires an initial warm-up before being applied to the skin in a generally molten state. Once applied, it is allowed to solidify before being removed from the skin along with the unwanted hair. This is known in the art as an epilation, since the hair is pulled from the skin to the root (patent ES2442918 T3).

Also in the prior art, wax bands extending and applying in the area to be depilated can be found in order to facilitate their removal (international application WO9730608 A1; ES2123430 B1).

Another type of composition is in the form of an emulsion or cream, and can be applied to the skin at room temperature. The cream includes a substance that degrades the hair keratin. Conventionally, said compositions are applied to the skin in areas where unwanted hair is present, leaving them in that area for a predetermined time to allow the keratin of the hair to degrade. Finally, the composition together with the degraded hair are removed from the skin, usually with an instrument such as a sponge or a spatula that drags it. Such compositions are known in the art as depilatory creams (patent EP2355788 B1).

There is a major problem with these depilatory compositions: if said composition is left in contact with the skin for excessive periods of time, there is a risk that it may cause skin irritation in certain users. If, on the contrary, the composition is present for too short a time, then the degradation of the keratin may be inadequate, which leads to only partial removal of the unwanted hair. Typical degradation periods are in the range of 3 to 10 minutes.

Other generalized problems of depilatory compositions of the aforementioned technique are usually: the difficulty in clarifying them, the characteristic smell of sulfur and the lack of ability to wrap the hair that depilatory creams have.

In view of the difficulties encountered in the field of the hair removal technique by application of compositions in the form of an emulsion, the present invention has been developed, which is a depilatory formulation in the form of a colloidal gel with better performance and results.

General description of the invention

The present invention is constituted by a depilatory composition in the form of a colloidal gel comprising at least:

- a depilatory agent which is a salt of thioglycolic acid, in an amount between 2.5% and 7.15% by weight of depilatory agent with respect to the total weight of the composition;

- at least one gelling agent, in an amount comprised between 1% and 3% by weight of the total weight of the composition;

- a pH regulating agent which is one or more hydroxides, independently selected from the group consisting of potassium hydroxide, sodium hydroxide, calcium hydroxide and lithium hydroxide; in an amount comprised between 2.75% and 4% by weight of the total weight of the composition;

- a pH buffer agent;

- a perfuming agent;

- at least one extract of plant origin;

- at least one colorant;

- at least one solubilizing agent; Y

- Water.

The properties of the present invention solve the problems of the state of the art, in that the depilatory composition remains in place on the skin for a sufficient time (preferably between 3 and 10 minutes) for the hair degradation to take place. to say that it is neither too short to be able to eliminate the hair nor too long to produce irritations, due to its thixotropy and the absence of fatty components. In addition, thanks to its cosmetic shape, it provides freshness during hair removal and is cosmetically more pleasant and transparent. The Depilatory composition in the form of colloidal gel has a viscosity, of approximately 20000-40000 cP measured with Brookfield viscometer R5 / 10 rpm and 25 ° C.

The composition, once the essential components and their quantities have been chosen, is completed with water until 100% of the composition is achieved. It should be borne in mind that this does not exclude that other optional and additional components may be added, which would increase the number and quantity of components and reduce the amount of water.

Preferably, the thioglycolic acid salt may be comprised in an amount of between 4% and 6%, more preferably still of 5.2675% by weight of the total weight of composition. Preferably also, the thioglycolic acid salt may be the potassium salt of thioglycolic acid or potassium thioglycolate, and more preferably Potassium Thioglycolate 43% (30% TGA).

For its part, the gelling agent can preferably be contained in an amount comprised between 1% and 3%, more preferably between 1.5% and 2.5%, more preferably still 2% by weight of the total weight of the composition. Also, the gelling agent can be selected from the group consisting of: a cellulose compound (for example hydroxyethylcellulose), carbopol (crosslinked polymer of acrylic acid), xanthan gum, among others, and any combination thereof.

The function of the pH regulator in the composition is to adjust the final pH of the product, thus being effective, while the pH buffer helps to keep the pH of the colloidal gel stable over time and that is not altered. Preferably, the pH regulating agent, which maintains a stable acid-base balance in the composition, can be present in an amount of between 2.75% and 3.75%, more preferably 3% by weight of the total weight of the composition. the composition. This regulatory agent can be selected from potassium hydroxide and sodium hydroxide, with more preferably being potassium hydroxide.

Also preferably, the pH buffer agent can be sodium gluconate and preferably it can also be comprised in an amount comprised between 0.1% -1%, more preferably 0.5% by weight of the total weight of the composition.

The colorant may be contained in an amount between 0.1 and 0.2%, more preferably 0.152% by weight of the total weight of the composition. It can also be selected from the group consisting of synthetic fluoroflogopite, phenolsulfonphthalein, mica, tin oxide, titanium dioxide (CI 77891) and any combination thereof.

As for the vegetable extract, it can for example be an extract of natural fruits, said extract being more preferably selected from the group consisting of: rosehip, aloe vera, fruit extract Fragaria chiloensis, fruit extract Rubus fruticosus, fruit extract Rubus idaeus, complex of Chilean strawberry ( Fragaria chiloensis) - blackberry - raspberry and any combination thereof. Preferably, these extracts or complexes of natural fruits are included in the composition in a percentage of between 0.05% and 0.2%. These extracts, sometimes due to their oily character, (for example, red fruits) must be solubilized to form part of the composition; for this reason, a solubilizing agent is included in an amount comprised between 2% and 10%, more preferably 3% by weight of the total weight of the composition.

When preparing the composition object of the invention with customary techniques known in the art, such as by mixing the components and stirring in a shaker in a cold turbulent regime to favor complete dispersion, it must be taken into account that said process it includes a stage of dispersion of the perfuming agent and of possible oil active ingredients (such as vegetable extracts, such as red fruits) in a solubilizing compound with a suitable hydrophilic-lipophilic balance (HLB), preferably between 15 and 18, as be selected from the group consisting of: polysorbate 20 (polyoxyethylene (20) sorbitan monolaurate), polysorbate 80 (polyoxyethylene (20) sorbitan monooleate) and hydrogenated castor oil PEG-40 or a surfactant with a hydrophilic-lipophilic balance ( HLB), preferably between 20 and 40, as can be selected from the group consisting of: lauryl sulfates, lauryl sarcosinates, coc oamfodiacetatos. As the depilatory gel is not formulated with fatty alcohols or oily emulsifiers, as it does with creams, it is not necessary to provide heat to melt said components when they are manufactured, which improves manufacturing times and reduces energy consumption.

Examples

Depilatory compositions in the form of colloidal gel according to the present invention.

Two depilatory compositions in the form of a colloidal gel according to the present invention, prepared according to what is described in the specification, are described below.

Composition 1

Claims (15)

A depilatory composition in the form of a colloidal gel comprising at least: - a depilatory agent which is a salt of thioglycolic acid, in an amount between 2.5% and 7.15% by weight of depilatory agent with respect to the total weight of the composition; - at least one gelling agent, in an amount comprised between 1% and 3% by weight of the total weight of the composition; - a pH regulating agent which is one or more hydroxides, independently selected from the group consisting of potassium hydroxide, sodium hydroxide, calcium hydroxide and lithium hydroxide; in an amount comprised between 2.75% and 4% by weight of the total weight of the composition; - a pH buffer agent; - a perfuming agent; - at least one extract of plant origin; - at least one colorant; - at least one solubilizing agent; Y - Water. The depilatory composition according to claim 1, having a viscosity, of between 20000-40000 cP measured with Brookfield viscometer R5 / 10 rpm and 25 ° C. 3. The depilatory composition according to any one of claims 1 or 2, wherein the thioglycolic acid salt is potassium thioglycolate. 4. The depilatory composition according to any one of claims 1 to 3, wherein the thioglycolic acid salt is comprised in the composition in an amount of between 4% and 6% by weight of the total weight of the composition. The depilatory composition according to any one of the preceding claims, wherein the gelling agent is selected from the group consisting of: a cellulose compound, carbopol, xanthan gum and any combination thereof. The depilatory composition according to any one of the preceding claims, wherein the gelling agent is comprised in an amount of between 1.5% -2.5% by weight of the total weight of the composition. The depilatory composition according to any one of the preceding claims, wherein the pH regulating agent is selected from potassium hydroxide and sodium hydroxide. 8. The depilatory composition according to any one of the preceding claims, wherein the pH regulating agent is comprised in an amount of between 2.75% and 3.75% by weight of the total weight of the composition. 9. The depilatory composition of any one of the preceding claims, wherein the pH buffer is sodium gluconate. The depilatory composition of any one of the preceding claims, wherein the pH buffer agent is comprised in an amount of between 0.1% and 1% by weight of the total weight of the composition. 11. The depilatory composition of any one of the preceding claims, wherein the dye is selected from the group consisting of synthetic fluoroflogopite, phenolsulfonphthalein, mica, tin oxide, titanium dioxide, a mixture of titanium dioxide and mica; a mixture of synthetic fluoroflogopite, titanium dioxide, tin oxide and any combination thereof. 12. The depilatory composition of any one of the preceding claims, wherein the colorant is comprised in an amount of between 0.1% and 0.2% by weight of the total weight of the composition. The depilatory composition of any one of the preceding claims, comprising at least one plant extract, selected from the group consisting of: rose hip, aloe vera, fruit extract Fragaria chiloensis, fruit extract Rubus fruticosus, fruit extract Rubus Idaeus, complex of Chilean strawberry - blackberry-raspberry and any combination thereof. 14. The depilatory composition of any one of the preceding claims, wherein the plant extract is comprised between 0.05% and 0.2% by weight of the total weight of the composition. The depilatory composition of any one of the preceding claims, wherein the solubilizing agent is selected from: a compound with a hydrophilic-lipophilic balance (HLB) of between 15 and 18 selected from the group consisting of: polysorbate 20, polysorbate 80 and PEG-40 hydrogenated castor oil; and a surfactant with a hydrophilic-lipophilic balance (HLB) of between 20 and 40 selected from the group consisting of: lauryl sulfates, lauryl sarcosinates and cocoamodiadetates; said solubilizing agent being comprised between 2 and 10% by weight of the total weight of the composition.