WO2019138190A1

WO2019138190A1 - Stable emulsions based on plant oils and on essential oils formulated without surfactant

Info

Publication number: WO2019138190A1
Application number: PCT/FR2019/050047
Authority: WO
Inventors: Isabelle Desjardins-Lavisse
Original assignee: Genialis Biotech
Priority date: 2018-01-10
Filing date: 2019-01-10
Publication date: 2019-07-18
Also published as: FR3076459A1; FR3076457A1; EP3737473A1; FR3076459B1

Abstract

The present invention relates to the field of emulsions and proposes more particularly stable emulsions comprising a mixture of a hydrophilic solution and a hydrophobic solution, said hydrophobic phase comprising at least one plant oil and at least one essential oil, which are formulated without surfactant, or any other replacement substance, the role of which would be to stabilize the products with respect to phase separation. These compositions have improved properties compared with compositions containing surfactants.

Description

STABLE EMULSIONS BASED ON VEGETABLE OILS AND OILS

ESSENTIAL FORMULA WITHOUT SURFACTANT

The present invention relates to the field of emulsions and more particularly proposes stable emulsions comprising a mixture of a hydrophilic solution and a hydrophobic solution, in particular emulsions in which the hydrophobic phase comprises at least one vegetable oil and at least one oil. essential, formulated without surfactant, or any other substitute substance whose role would be to stabilize the products vis-à-vis the phase separation. These compositions have improved properties over compositions containing surfactants.

PRIOR ART

The preparation of surfactant-free emulsions has been a subject of interest in many fields for many years. Emulsions are found in fields as varied as cosmetics, pharmacopoeia, agri-food, cleaning products and even lubrication. The use of surfactants to stabilize the emulsions poses various problems according to the needs and uses for which the products are intended: allergenic risk, texture modification, appearance of friction residues, etc. Most solutions proposed to date as an alternative to their use concern the use of particular substances, not classified as surfactants, but whose role in the formulation is to compensate for the absence. US Pat. No. 6,416,748 proposes, for example, the use of a crosslinked polymer of at least one ethylenically unsaturated monomer, whereas the patent FR2750327 proposes using a crosslinked and neutralized poly (2-acrylamido-2-methylpropane sulfonic acid). These solutions are thus based on the use of large molecules, which stabilize the emulsion by structuring that they impose on their environment. The patents FR27221 16 and FR2720644 propose, for their part, examples of use of solid particles which ensure the dispersion of one of the two phases in the other. These particles also have the advantage of offering product textures that are more advantageous for the consumer. Other solutions are proposed by patents CA2295533 and FR2771293, which respectively describe the use of a cationic gel and a lipophilic agent including HLB (Hydrophilic / lipophilic balance) is less than 3. The stability of the preparations made is then ensured by the structuring that allow these surfactant compounds at the hydrophilic / lipophilic interface.

The irritant and allergenic power of surfactants, their long-term toxicity and their fate after use (biodegradability, ecotoxicity, etc.) pose public health and environmental problems. In particular, cationic surfactants are irritating (especially for the eyes) and toxic to the environment. Anionic surfactants, the most used because they are good detergents and they foam well, easy to rinse, are generally irritating, although softer than cationic. Finally, nonionic surfactants, with low foaming power, often used as emulsifiers or thickeners, are suspected for some of them (ethoxylated alcohols, alkanolamides, ethoxylated alkylphenols) to be disrupters of the hormonal system.

However, when a hydrophilic phase and a hydrophobic phase are brought together, the direct dispersion of one of the two phases in the other, stably in time (ie without the two phases becoming distinct) is not possible without adding significant amounts of additional substances, such as surfactants, or without particular technologies.

It appears from the state of the prior art that there are currently no proposals for the preparation of stable emulsified products by significantly reducing the quantities of substance, of any kind, whose role is to ensure the stability of the mixture. Thus, the properties of the products proposed so far are not satisfactory.

ADVANTAGES OF THE INVENTION

The invention provides compositions consisting of a stable emulsion over time. Remarkably, these compositions are stable in the absence of stabilizing molecules (surfactants, gelling agents, etc.) and possess particular properties which give them a competitive advantage. Indeed, surprisingly, the inventors have shown that the absence of surfactant molecules allows optimal activity of the active ingredients. These compositions can be broken down into different innovative products because of both an advantageous texture (emulsion without surfactant) and particularly effective active princeps (not inhibited by surfactants), for example:

- in the form of shampoo: product with a neutral pH, non-sticky, non-aggressive for the hair, which brings them softness and in which the activity of the active ingredients is potentiated (HE in particular);

- in the form of a perfume product: product with a low alcohol content, persistent fragrance;

- in the form of a product with topical application (cream, milk, lotion): no unpleasant sensation of fat or stickiness on application, remarkable efficiency and safety, for example for cutaneous repair (burn, cut) or to relieve irritation related to insect bites.

Appropriate tests show that the properties of these products are superior to those of products containing the same ingredients, including the same active ingredients in the same proportions, but stabilized by the addition of surfactants.

DETAILED DESCRIPTION OF THE INVENTION

The present invention relates to novel compositions consisting of an emulsion of two immiscible phases, in particular a hydrophilic phase and a hydrophobic phase. These compositions constitute stable emulsions even though this stability should not be observed in view of the surfactant levels they contain. In particular, the mixtures contain small amounts of surfactant, or even no surfactant. These emulsions are obtained using the method using high frequency ultrasound, as described in the patent application WO2010 / 149668.

Thus, the subject of the invention relates to an emulsion-type composition comprising a mixture of a hydrophilic solution and a stable hydrophobic solution in the absence of surfactant, characterized in that it is obtained by an ultrasonic treatment of which the vibration frequency is greater than or equal to 1 MHz. In a preferred embodiment, the invention relates to a composition of emulsion type, stable in the absence of surfactant, comprising a mixture of at least one hydrophilic solution and at least one hydrophobic solution, said hydrophobic solution comprising at least one oil plant and at least one essential oil, characterized in that it is obtained by an ultrasonic treatment whose vibration frequency is greater than or equal to 1 MHz.

In a particular embodiment, the emulsion-type composition according to the invention consists of a mixture of a hydrophilic solution and a hydrophobic solution, stable in the absence of surfactant.

An emulsion is a mixture, macroscopically homogeneous but microscopically heterogeneous, of two immiscible liquid substances. For the purposes of the invention, the term "emulsion" refers to a mixture of a hydrophilic phase and a hydrophobic phase.

The compositions according to the invention may be of the oil-in-water emulsion or water-in-oil type, depending on the relative amounts of the components.

The compositions according to the invention are formulated without surfactant. Within the meaning of the invention, a composition is said to be "without surfactant" or "stable in the absence of surfactant" if it does not contain surfactant, emulsifier, or other substance or particle in an amount such that it allows to stabilize the preparation vis-à-vis the phase separation. In the context of the present invention, the term "surfactant" will be used to designate generally any component having a stabilizing action on the emulsion.

Thus, it is possible to add a small amount of a component described as having surfactant properties provided that its amount is insufficient to contribute to the stabilization of the product, whether used alone or in combination with other molecules surfactant. Thus, the stability can not be attributed to the amount of surfactants present in the composition, but results directly from a particular treatment of the mixture, carried out by process. Thus, the presence of molecules generally used as stabilizing molecules is not not excluded to the extent that, in small quantities, they can bring interesting properties to emulsions (out of stabilization) for example a foaming effect.

The nature of the hydrophilic phase (or hydrophilic solution) used to prepare the emulsion can be diverse. It may for example be water of various qualities (demineralised, purified, etc.), plant extracts, vegetable aqueous macerates, infusions, hydrolates, including vegetable hydrosols, vegetable waters from fruit or plants, juice, or a mixture of all or part of these products. The hydrophilic phase may also contain one or more water-soluble compounds.

The nature of the hydrophobic phase (or hydrophobic solution) used to prepare the emulsion can be diverse. It may for example be vegetable oils, namely pure vegetable oils or extracts of vegetable oils, oily macerates or infusions in oils. It may also be essential oils, mineral oils, waxes, synthetic raw materials or perfume raw materials such as absolutes or concretes. The hydrophobic phase may also consist of a mixture of all or part of these products and may contain one or more liposoluble compounds.

In a particular embodiment of the invention, the hydrophobic solution comprises at least one vegetable oil and at least one essential oil.

Alcohols may also be incorporated into certain compositions of the invention. They may be of hydrophilic or hydrophobic nature depending on the length of their carbon chain and the nature of the groups they carry.

Emulsions excluding any texturizing agent are liquid. So as to facilitate handling and use, gelling agents may be added without this denatures the emulsion, including its properties. Thus, the compositions according to the invention may contain gelling agents, preferably of natural origin, such as xanthan gum or alginates. The gelling agents will act primarily on the texture of the composition, which will depend on the amount added. In order to obtain a liquid-type composition of the lotion type, the proportion of gelling agent will generally be less than 0.1%, preferably equal to 0% of the composition.

In order to obtain a milk-type composition that has a flowable but non-sprayable appearance, the proportion of gelling agent will generally be between 0.1% and 0.8% of the composition.

In order to obtain a gel composition of non-flowing appearance, the proportion of gelling agent will generally be between 0.8% and 2% of the composition.

To obtain a poultice-like composition or paste, of thick and creamy appearance, the proportion of gelling agent will generally be between 2% and 5% of the composition.

Since the texture is temperature dependent, these indications correspond to the appearance of the compositions at room temperature, ie at a temperature of about 20 ° C., and generally between 15 ° C. and 27 ° C.

The gelling agents are added after emulsification according to the desired texture.

The pH of the products obtained after emulsification is generally between 6 and 7, preferably equal to 7. It is possible to add, if necessary, an acidity corrector to adjust the pH of the composition as close to that of the need. . The pH may for example be adjusted to a value of less than 5 to improve the preservation or adjusted as close as possible to that of the skin for creams for topical use.

If an acidity corrector is added, this addition may take place either during the emulsification process or at the end of the process.

However, the fact of having a stable emulsion at neutral pH has an advantage in the choice of preservatives. Indeed, the most used preservatives are effective only at acidic pH, for example at pH 5.5 for potassium sorbate. However, these preservatives, especially potassium sorbate (E202) may have irritating effects on the skin, eyes and respiratory tract and have some toxicity; studies are underway to determine the degree of dangerousness of this product. In this context, it is interesting to be able to offer formulations containing preservatives of natural origin having a better tolerability, such as cosgard or leucidal, which are effective at neutral pH. Thus, the compositions of the invention have the advantage of being stable, effective and compatible with the use of preservatives of natural origin. An example of such a composition is described in Example 1 which describes a shampoo with very interesting properties for the hair while having a neutral pH, which is both surprising and innovative.

For better preservation of the compositions over time, it may be necessary to add antimicrobial products and / or antioxidants. For example, it is important in cosmetics applications to avoid the rancidity of HV, which can become comedogenic. The percentage of antimicrobial products and / or antioxidants needed varies depending on the activity of the product itself and the composition itself. The essential oils present in the compositions can naturally play this role of preservatives.

As an example, some natural organic preservatives:

- Naticide 0.6% for pH: 4 <pH <9

- Cosgard 0.6% for pH <7

- Leucidal 2.25% for pH <9

0.75% benzoate sorbate complex for pH <5.5

- Grapefruit seeds 0.55%

Examples of antioxidants are tocopherol (0.2%) and rosemary CO2 extract (0.075%).

The potential advantages of the compositions of the invention are numerous and they can differ according to the fields of application and the use that is made of them.

Due to a simpler formulation, it is possible to prepare natural and healthy compositions having less allergenic risk than compositions containing surfactants. The compositions can be 100% organic, in the agri-food and cosmetic fields, for example. The inventors also showed that the activity of the active ingredients is preserved in the emulsified compositions without surfactant and that the effectiveness of the compositions (without surfactant) is higher than that of the products with surfactants, in proportion to equivalent active ingredients. Finally, these compositions are stable. Their stability is ensured by the method, thanks to an ultrasonic treatment whose vibration frequency is greater than or equal to 1 MHz, as described in patent WO2010 / 149668. Their stability at room temperature is observed for at least 3 months and up to more than 36 months.

In a particular embodiment, the composition is an oil-in-water emulsion comprising between 2% and 10% of coco-caprylate, between 2% and 10% of vegetable oil, between 0.1% and 3% of coconut oil. essential oil and between 0% and 85% hydrosol. Such a composition can be used as a shampoo. In a preferred embodiment, such a composition will further comprise between 5% and 30% foaming agents, to satisfy the user waiting for a foam product.

Such products that can be used as a shampoo are described in Examples 1, 1 1 and 12.

Thus, a composition according to the invention comprises apricot kernel oil, atlas cedar essential oil and grapefruit essential oil.

Another composition according to the invention comprises vegetable oil of jojoba, vegetable oil of camelina and essential oil of incense oilban.

In a particular embodiment, the composition is an oil-in-water emulsion comprising:

a hydrophilic phase comprising ethanol in a proportion of between 1% and 30% of the total composition and

a hydrophobic phase comprising at least one perfuming component.

Such a composition can be used as a perfume (body, atmosphere ...) The perfume component is selected from an HE, an HV and a perfume raw material. The vegetable oil may be an oily macerate such as an oily macerate of vanilla. The perfumery raw material can be an absolute or a concrete plant, or a mixture of such components. By way of example, a perfuming composition according to the invention comprises between 1% and 30% of absolute ethanol and at least one perfuming component chosen from (i) between 2% and 20% of oily macerate, (ii) between 0% and , 1% and 3% of essential oil, and (iii) between 0.05% and 5% of perfume raw materials. Such a composition can be used as a room fragrance.

An example of a composition according to the invention that can be used as a room fragrance is described in Example 2.

In a particular embodiment, the composition is an oil-in-water emulsion in which the hydrophobic phase comprises between 5% and 30% of vegetable oil, and between 0.1% and 3% of essential oil and the hydrophilic phase. comprises between 0% and 85% of hydrosol and between 0% and 30% of aloe vera juice. Such a composition can be used as a bath milk, care cream or massage cream.

Such products that can be used as a cosmetic product (for topical use) or for dilution in the bath are described in Examples 3 to 10.

Thus, a composition according to the invention comprises apricot kernel oil, geranium bourbon essential oil, Scots pine essential oil and Roman chamomile essential oil.

Another composition according to the invention comprises apricot kernel oil, geranium bourbon essential oil, palmarosa essential oil and lavender essential oil.

Another composition according to the invention comprises apricot kernel oil, radioactive eucalyptus essential oil, Scots pine essential oil, thyme essential oil and essential oil of rosemary.

Another composition according to the invention comprises an oily macerate of St. John's wort, essential oil of geranium bourbon, essential oil of thyme, essential oil of palmarosa, essential oil of cypress of Provence, l Pistachio lentisk essential oil, a hydrolyzate of Provence cypress and aloe vera juice.

Another composition according to the invention comprises an oily macerate of St. John's wort, an oily macerate of arnica, the essential oil of rosemary with camphor, oil essential oil of gauthérie, the essential oil of helichrysum of Madagascar, a hydrolat of orange blossom and the juice of aloe vera.

Another composition according to the invention comprises an oily macerate of St. John's wort, black pepper essential oil, common juniper essential oil, lemon eucalyptus essential oil, cypress essential oil, Provence, Italian helichrysum essential oil, a hydrolyzate of Provence cypress and aloe vera juice.

Another composition according to the invention comprises an oily macerate of Aloe vera, essential oil of ravintsare, essential oil of lavender aspic, essential oil ladaniferous cole, essential oil of Italian helichrysum , a fine lavender hydrosol and aloe vera juice.

Another composition according to the invention comprises an oily macerate of Aloe vera, essential oil of geranium bourbon, lemon eucalyptus essential oil, essential oil of lavender aspic, essential oil of Lemongrass, a fine lavender hydrosol and aloe vera juice.

Other surprising particular properties and advantages of the invention can be brought to light through the examples presented below.

EXAMPLES

EXAMPLE 1 Formulation of a shampoo

A comparison is made on the basis of three similar formulations 1a, 1b and 1c.

Preparation of formulations

1.a A shampoo preparation according to the invention can be obtained from the following ingredients:

Table 1: Composition of a shampoo

All the ingredients, except for the two texturants (Xanthane and Solagum), are emulsified under high frequency vibration, as described in the patent application WO2010 / 149668. The pH of the preparation is then adjusted to 7, if necessary, and the two texturants are added to the finished and stabilized emulsion so as to obtain the desired texture. It is optionally possible to add to this formula, without modifying the properties of interest, a preservative and an antioxidant in respective proportions to ensure the non-degradation of the product over time.

1.b. The same preparation as at 1.a is performed, except that the high-frequency vibratory treatment is not applied. It is replaced by a mechanical stirring applied using a rotor / stator combined with the application of a sonication at 24 kHz until reaching an average size of the dispersed particles of about 500 nm and a polydispersity index less than 0.3.

1 C. A preparation similar to 1.b is carried out. In addition, anionic surfactant (triethanolamine stearate) is added to the preparation in an amount of 8% of the formulation. Results

The main observations and properties of shampoos obtained are summarized in Table 2 below. These results are observed 1 month after preparation with regard to the effects obtained. The products are considered stable if no phase separation is observed after 2 months storage at 50 ° C.

stability at 50 ° C less than 2 days

: heavy if adding silicones to the formula.

Table 2: Comparison of the properties of shampoos

The first remarkable observation concerns the lack of stability of the preparation 1.b. Although foaming agents are generally considered to belong to the family of surfactants (in this case Coco glucoside and Coco-Betaine), it is observed that their mere presence is not sufficient to maintain an emulsion in place and that a phase separation occurs. quickly without proper treatment. On the contrary, the preparation 1.a comprising the same ingredients but emulsified under high frequency vibration is stable.

Surprisingly and surprisingly, the product 1.a also leads to the product 1.c several properties very interesting. As a reminder, the preparations 1.a and 1.c are both stable but the first preparation is formulated without surfactant while the second is formulated with 15% of surfactants. First, the texture of the hair is soft after washing with shampoo 1.a while those They are rough after washing with shampoo 1 .c. The surfactants added to 1c, and generally present in existing products, do not act only on the stability of the product vis-à-vis the phase separation; they also act on the hair and the scalp, drying and degreasing them completely, so that they lose their outermost protective layers. Therefore, the use of shampoos containing surfactants, such as the product 1 .c, require for example the subsequent use of a conditioner whose role is often to rehydrate the hair and correct the pH of the hair and of the scalp, so as to find softness and ease of styling. In addition, silicones are conventionally added to the shampoo formula to guarantee a sheathing effect.

For professional cosmeticians, it is especially very surprising to obtain such properties with the product 1 .a given its neutral pH. It is generally accepted that the soft texture of the hair and the ease of styling it can not be achieved without acidification of the hair so as to close the cuticles (or scales). This acidification is also widely practiced and recognized among followers of "grandmothers' recipes". The possibility of formulating a shampoo with such properties at pH 7 therefore presents in itself a new and innovative character.

Finally, the frequency of application can be reduced by a factor of 2 to 4 between 1 .c and 1 .a, depending on the nature of the hair. The slightest deterioration of the hair and in particular the fact of reducing the opening / closing effects of the cuticles of the hair, makes it possible to limit their need for care.

EXAMPLE 2: Formulation of a room fragrance

A room fragrance can be obtained from the following ingredients:

Table 3: Composition of a room fragrance

The ingredients are emulsified under high frequency vibration, as described in patent application WO2010 / 149668.

The product is stable over time with respect to phase separation, although it does not contain a surfactant and the alcohol fraction is low. Remarkably, and similar to the observations of the previous examples, a stable equivalent product (prepared without high-frequency vibration treatment) can not be obtained without the addition of surfactant or without the amount of ethanol accounting for at least half of the fraction. water + ethanol ".

The fragrance is powerful and persistent, despite the low proportion of components contributing to the scenting power and the low proportion of alcohol, usually used to "carry" the odors in space thanks to its volatility at room temperature.

EXAMPLE 3: Formulation of a "Youth" bath milk A preparation for bath milk according to the invention can be obtained from the following ingredients:

Table 4: Composition of a "Youth" bath milk

All ingredients, except texturizer (Xanthane), are emulsified under high frequency vibration, as described in patent application WO2010 / 149668. The pH of the preparation is then adjusted to 7, if necessary, and the texturizer is added to the finished and stabilized emulsion to obtain the desired texture. It is optionally possible to add to this formula, without modifying the properties of interest (such as the nourishing, firming and anti-aging properties of the composition), a preservative and an antioxidant in respective proportions to ensure the no degradation of the product over time.

Remarkably and similar to the observations of the previous examples, a stable equivalent product (prepared without high frequency vibration processing) can not be obtained without the addition of surfactant. Furthermore, the product according to the invention is dispersible in water with minimal agitation (that generated by the faucet of the bath is sufficient) although it is slightly textured. The product therefore has unique properties of use since it can, in addition to its original use as a bath milk, also be used as a fluid care cream or massage thanks to its textured formula.

EXAMPLE 4: Formulation of a bath milk "Relaxation"

A bath milk preparation according to the invention can be obtained from the following ingredients:

Table 5: Composition of a "Relaxation" bath milk

All ingredients, except texturizer (Xanthane), are emulsified under high frequency vibration, as described in patent application WO2010 / 149668. The pH of the preparation is then adjusted to 7, if necessary, and the texturizer is added to the finished and stabilized emulsion to obtain the desired texture. It is optionally possible to add to this formula, without modifying the properties of interest (such as the soothing and softening virtues), a preservative and an antioxidant in respective proportions to ensure the non-degradation of the product over time .

EXAMPLE 5: Formulation of an "Inspiration" bath milk

Table 6: composition of an "Inspiration" bath milk

All ingredients, except texturizer (Xanthane), are emulsified under high frequency vibration, as described in patent application WO2010 / 149668. The pH of the preparation is then adjusted to 7, if necessary, and the texturizer is added to the finished and stabilized emulsion to obtain the desired texture. It is optionally possible to add to this formula, without modifying the properties of interest (such as the decongestant and refreshing virtues), a preservative and an antioxidant in respective proportions to ensure the non-degradation of the product over time .

EXAMPLE 6: Formulation of a massage gel "circulation"

A massage gel preparation according to the invention can be obtained from the following ingredients:

Table 7: Composition of a massage gel "circulation" All ingredients, except texturants (gum tara and xanthan), are emulsified under high frequency vibration, as described in the patent application WO2010 / 149668. The pH of the preparation is then adjusted to 7, if necessary, and the texturizers are added to the finished and stabilized emulsion so as to obtain the desired texture. It is possible to add to this formula, without modifying the properties of interest (such as circulatory and anti-inflammatory virtues), a preservative and an antioxidant in respective proportions to ensure the non-degradation of the product in the weather. It is also possible to add an emollient (coco caprylate for example) to modify the sensoriality of the product when a particular additional effect is sought.

Remarkably and similar to the observations of the previous examples, a stable equivalent product (prepared without high frequency vibration processing) can not be obtained without the addition of surfactant. Moreover, during the application, it leaves no unpleasant feeling of stickiness or fat.

EXAMPLE 7 Formulation of a "Muscular" Massage Gel A massage gel preparation according to the invention can be obtained from the following ingredients:

Table 8: Composition of a "muscular" massage gel

All ingredients, except texturants (tara gum and xanthan), are emulsified under high frequency vibration, as described in the patent application WO2010 / 149668. The pH of the preparation is then adjusted to 7, if necessary, and the texturizers are added to the finished and stabilized emulsion so as to obtain the desired texture. It is possible to add to this formula, without modifying the properties of interest (such as the anti-inflammatory and pain-relieving virtues, soothing for muscles and joints), a preservative and an antioxidant in respective proportions allowing ensure that the product does not deteriorate over time. It is also possible to add an emollient (coco caprylate for example) to modify the sensoriality of the product when a particular additional effect is sought.

Remarkably and similar to the observations of the previous examples, a stable equivalent product (prepared without high frequency vibration processing) can not be obtained without the addition of surfactant. Moreover, during the application, it leaves no unpleasant feeling of stickiness or fat. EXAMPLE 8: Formulation of a "slimming" massage gel

Table 9: Composition of a "slimming" massage gel

All ingredients, except texturants (tara gum and xanthan), are emulsified under high frequency vibration, as described in the patent application WO2010 / 149668. The pH of the preparation is then adjusted to 7, if necessary, and the texturizers are added to the finished and stabilized emulsion so as to obtain the desired texture. It is possible to add to this formula, without modifying the properties of interest (such as circulatory, fight against water retention), a preservative and an antioxidant in respective proportions to ensure the non-degradation of the produced in time. It is also possible to add an emollient (coco caprylate for example) to modify the sensoriality of the product when a particular additional effect is sought.

Remarkably, and similar to the observations of the previous examples, a stable equivalent product (prepared without high frequency vibration treatment) does not can not be obtained without the addition of surfactant. Moreover, during the application, it leaves no unpleasant feeling of stickiness or fat.

EXAMPLE 9 Formulation of a cream "cutaneous repair"

A cream preparation according to the invention can be obtained from the following ingredients:

Table 10: Composition of a cream "cutaneous repair"

All ingredients, except the texturizer (xanthan), are emulsified under high frequency vibration, as described in the patent application WO2010 / 149668. The pH of the preparation is then adjusted to 7, if necessary, and the texturizer is added to the finished and stabilized emulsion to obtain the desired texture. It is possible to add to this formula, without modifying the properties of interest (such as soothing and calming virtues, stimulating healing), a preservative and an antioxidant in respective proportions to ensure the non-degradation of the product in time. It is also possible to add an emollient (coco caprylate for example) to modify the sensoriality of the product when a particular additional effect is sought. Remarkably and similar to the observations of the previous examples, a stable equivalent product can not be obtained without the addition of surfactant. Moreover, during the application, it leaves no unpleasant feeling of stickiness or fat. In addition, this composition has remarkable properties for skin repair, especially in the event of burns or cuts. These properties have been evaluated by a specialized independent laboratory in comparison with commercial reference products.

EXAMPLE 10: Formulation of a cream "insect sting"

Table 11: Composition of an insect sting cream

All ingredients, except the texturizer (xanthan), are emulsified under high frequency vibration, as described in the patent application WO2010 / 149668. The pH of the preparation is then adjusted to 7, if necessary, and the texturizer is added to the finished and stabilized emulsion to obtain the desired texture. It is optionally possible to add to this formula, without modifying the properties of interest, a preservative and an antioxidant in respective proportions. to ensure the non-degradation of the product over time. It is also possible to add an emollient (coco caprylate for example) to modify the sensoriality of the product when a particular additional effect is sought.

Remarkably and similar to the observations of the previous examples, a stable equivalent product (prepared without high frequency vibration processing) can not be obtained without the addition of surfactant. Moreover, during the application, it leaves no unpleasant feeling of stickiness or fat. The product is particularly effective, both to prevent bites and to relieve irritations consecutive thereto.

EXAMPLE 11 Formulation of a shampoo "force"

A shampoo preparation according to the invention can be obtained from the following ingredients:

Table 12: Composition of a shampoo «force»

All the ingredients, except texturants (xanthan and gum acacia), are emulsified under high frequency vibration, as described in the patent application WO2010 / 149668. The pH of the preparation is then adjusted to 7, if necessary, and the Texturants are added to the finished and stabilized emulsion, so as to obtain the desired texture. It is optionally possible to add to this formula, without modifying the properties of interest (such as fortifying and purifying virtues), a preservative and an antioxidant in respective proportions to ensure the non-degradation of the product over time .

Remarkably, and similar to the observations of the preceding examples, the presence of foaming agents (coco glucoside and coco betaine) does not make it possible to obtain a stable equivalent product without treatment by high frequency vibration, although these are classified as surfactants. . During the application, the shampoo leaves no unpleasant feeling of stickiness or fat in the hair. These are smooth and smooth without the need to rebalance their pH, with a conditioner for example.

EXAMPLE 12: Formulation of a shampoo "sweetness"

Table 13: composition of a "softness" shampoo All the ingredients, except texturants (xanthan and gum acacia), are emulsified under high frequency vibration, as described in the patent application WO2010 / 149668. The pH of the preparation is then adjusted to 7, if necessary, and the texturizers are added to the finished and stabilized emulsion so as to obtain the desired texture. It is optionally possible to add to this formula, without modifying the properties of interest (such as the rehydrating, rebalancing and antioxidant properties), a preservative and an antioxidant in respective proportions to ensure the non-degradation of the produced in time.

Claims

1. A composition of emulsion type, stable in the absence of a surfactant, comprising a mixture of at least one hydrophilic solution and at least one hydrophobic solution, said hydrophobic solution comprising at least one vegetable oil and at least one essential oil, characterized in what it is obtained by an ultrasound treatment whose vibration frequency is greater than or equal to 1 MHz.

2. Composition according to claim 1 of oil-in-water emulsion type comprising between 2% and 10% of coco-caprylate, between 2% and 10% of vegetable oil (s), between 0.1% and 3% essential oil (s) and between 0% and 85% hydrolat.

3. Composition according to claim 2 wherein the vegetable oil is apricot kernel oil and the essential oils are atlas cedar essential oil and grapefruit essential oil and wherein the hydrophilic solution is a hydrosol of orange blossom.

4. Composition according to claim 2 wherein the vegetable oils are jojoba vegetable oil and camelina vegetable oil and the essential oil is the essential oil of incense oilban and wherein the hydrophilic solution is a hydrosol of Orange Blossom.

5. Use of a composition according to one of claims 2 to 4 as a shampoo.

6. Composition according to claim 1 of oil-in-water emulsion type comprising:

a hydrophilic phase comprising ethanol in a proportion of between 1% and 30% of the total composition and a hydrophobic phase comprising at least one perfume component chosen from an essential oil, a vegetable oil and a perfumery raw material.

7. Use of a composition according to claim 6 as a perfume.

8. Composition according to claim 1 of oil-in-water emulsion type comprising between 5% and 30% of vegetable oil (s) and between 0.1%, 3% essential oil (s) (s). ), 0% and 85% of hydrolate and 0% to 30% of aloe vera.

9. A composition according to claim 8 wherein the vegetable oil is apricot kernel oil and the essential oils are essential oil geranium bourbon, essential oil of Scots pine and essential oil of Roman chamomile .

10. The composition of claim 8 wherein the vegetable oil is apricot kernel oil and the essential oils are geranium bourbon essential oil, palmarosa essential oil and lavender essential oil aspic.

1 1. The composition of claim 8 wherein the vegetable oil is apricot kernel oil and the essential oils are the essential oil of eucalyptus radish, the essential oil of Scots pine, the essential oil of thyme and the essential oil of rosemary.

12. A composition according to claim 8 wherein the vegetable oil is an oily macerate of St. John's Wort and the essential oils are geranium bourbon essential oil, thyme essential oil, palmarosa essential oil and essential oil. of cypress of Provence and the essential oil of pistachio lentisk, and in which the hydrophilic solution comprises a hydrolyzate of Provence cypress and aloe vera juice.

13. A composition according to claim 8 wherein the vegetable oils are an oily macerate of St. John's Wort and an oily macerate of arnica and the essential oils are the essential oil of rosemary to camphor, the essential oil of gautheria and the helichrysum essential oil from Madagascar and in which the hydrophilic solution comprises a hydrosol of orange blossom and aloe vera juice.

The composition of claim 8 wherein the vegetable oil is an oily macerate of St. John's wort and the essential oils are black pepper essential oil, common juniper essential oil, lemon eucalyptus essential oil and essential oil of Provence cypress and Italian helichrysum essential oil and in which the hydrophilic solution comprises a hydrolyzate of Provence cypress and aloe vera juice.

15. Composition according to claim 8, in which the vegetable oil is an oily macerate of Aloe vera and the essential oils are the essential oil of ravintsare, the essential oil of lavender aspic, the essential oil of the caterpillar and the Italian helichrysum essential oil and in which the hydrophilic solution comprises a fine lavender hydrosol and aloe vera juice.

16. A composition according to claim 8 wherein the vegetable oil is an oily macerate of Aloe vera and the essential oils are essential oil of geranium bourbon, lemon eucalyptus essential oil, essential oil of lavender aspic and the essential oil of citronella and wherein the hydrophilic solution comprises a fine lavender hydrosol and aloe vera juice.

17. Use of a composition according to one of claims 8 to 16, as a bath milk, milk or care cream or gel or massage cream.