EYE MAKEUP COMPOSITION BASED ON A VOLATILE MIXTURE OF ALKANES

This application concerns the technical field of cosmetics.

More specifically, the invention relates to an eye makeup composition comprising a volatile mixture of alkanes.

Even more specifically, the invention relates to a mascara composition or an eyeliner composition comprising a volatile mixture of alkanes.

As part of this application, a number of definitions must be given.

An “alkane” is a saturated hydrocarbon consisting only of carbon and hydrogen atoms linked together by simple covalent bonds whose general formula is C_nH_2n+2.

A “linear alkane” is an alkane in which each carbon atom is bonded to a maximum of two carbon atoms.

A “branched alkane” is an alkane in which some carbon atoms are linked to three or even four carbon atoms.

A “C_xalkane” is an alkane made up of x carbon atoms, which alkane can be linear or branched. For example, dodecane is an alkane consisting of 12 carbon atoms or C₁₂.

Commonly, a “volatile mixture of alkanes” is a mixture of alkanes having a flash point less than or equal to 95° C. measured according to the ATSM D93 standard.

For the purposes of the present invention, the term “volatile mixture of alkanes” means a mixture of alkanes having a flash point less than or equal to 55° C. measured according to the ATSM D93 standard.

The flash point measured according to ASTM D93 is called the “flash point”. The unit of flash point measured according to ASTM D93 is degrees Celsius (° C.). It can also be an average of values, each value being obtained by means of a measurement according to the ASTM D93 standard.

The term “mass percentage” refers to the ratio of the mass of a first compound to the total mass of a mixture of compounds or composition, reduced to a percentage. For example, if 10 grams of a compound y are present in a mixture z having a total mass of 100 grams, then the mass percentage of y in z is 10%.

A “bio-based” compound or organic composition is defined as one in which the organic carbon present in the compound or composition is 100% of plant origin (¹⁴C) by radiocarbon analysis according to one of the following standards: ASTM D6866, EN 16640 or EN 16785-1.

The “index of naturalness” of an organic composition is the percentage of organic carbon of plant origin (¹⁴C) determined by radiocarbon analysis according to one of the following standards: ASTM D6866, EN 16640 or EN 16785-1.

For the purposes of the present invention, the OECD 301F method makes it possible to assess the biodegradability of a substance by a manometric respirometry test.

Since the appearance of isododecane in cosmetics in the 1990s, its use has expanded considerably in all areas of cosmetics, from skin care products to makeup products such as mascara compositions, long-lasting lipstick, and hair products such as serums or anti-frizz dry oils.

In some of these products, isododecane can represent up to 60% by mass percentage of the composition of these cosmetic formulas.

Long-lasting makeup now represents around 25% of the global makeup market: isododecane is a key component because it allows for long-lasting, transfer-free and water-resistant performance, while maintaining optimal comfort. This market was developed from this essential ingredient, isododecane, from petrochemicals.

However, with oil resources being limited and the oil market being fluctuating and polluting, meeting the demand for isododecane or being able to provide at least equivalent properties in cosmetic formulations represents a strategic challenge for the cosmetic industry.

To address such a challenge, a first approach is to develop a process for producing isododecane that does not use petroleum raw materials.

Recently, GLOBAL BIOENERGIES disclosed in its application WO2020188033, the production of isobutene by a biological process using a genetically modified organism such as the modified E. Coli bacteria.

The isobutene gas obtained is then converted into isododecane by a solvent phase oligomerization reaction followed by a hydrogenation step according to patent application WO2021228824.

This reaction, known in the chemical industry, has the disadvantage of forming by-products and offering a low yield, which raises questions about the viability of this approach in the long term in terms of volume and cost.

Nevertheless, more than €100 million was raised by GLOBAL BIOENERGIES for the development of such a process between 2008 and early 2021, the date of release of the first batch of cosmetic-grade isododecane.

This long-term economic investment for the production of isododecane from natural raw materials is remarkable.

Indeed, a second strategy, consisting of reducing the quantity of isododecane present in current cosmetic products or even substituting it, is a challenge of a completely different magnitude for the cosmetics industry.

Furthermore, finding a biodegradable substitute for isododecane would be a major advance from an environmental point of view, as mentioned in patent application EP3349720, such a compound being able to represent up to a mass percentage of 60% of the cosmetic composition.

Research was thus carried out in order to identify compounds likely to offer a satisfactory alternative to isododecane, these compounds having to have similar volatility characteristics and similar behavior in a formulation, in particular in terms of sensory properties such as the ability to spread on the skin, the sensation to the touch, or even the “non-greasy” character of the film obtained.

Thus, there remains a need, from an economic and ecological point of view, to have a cosmetic excipient capable of substituting isododecane, in particular as an excipient to be included in cosmetic formulations.

Surprisingly, it was demonstrated by the Applicant that such an excipient could be obtained.

This excipient is a volatile mixture of alkanes as previously defined.

Preferably, this volatile mixture of alkanes is obtained from fatty alcohols by a Guerbet alcohol reaction followed by a dehydration and hydrogenation reaction. This synthesis route advantageously makes it possible to obtain a substitute excipient for isododecane, from raw materials of natural origin using an economically viable industrial process in relation to market needs.

An excipient of “natural origin” means an excipient that is obtained directly from the earth, soil, water, atmosphere or from plants, via, where appropriate, one or more physical processes, such as, for example, grinding, refining, distillation, purification or filtration.

An excipient of “natural origin” is understood to mean an excipient which has undergone at least one chemical or industrial treatment, resulting in modifications which do not affect the essential qualities of this excipient and/or an excipient comprising mainly natural constituents which have or have not undergone transformations, as indicated above.

As a non-limiting example of additional chemical or industrial treatments resulting in modifications that do not affect the essential qualities of a natural compound, we can mention those authorized by control organizations such as Ecocert or Cosmos.

For the purposes of the invention, the term “synthetic or artificial excipient” means an ingredient which does not meet the definitions of natural or naturally-derived excipients indicated above.

Moreover, such an excipient is biodegradable according to the OECD 301F method unlike isododecane (CAS 13475-82-6).

Advantageously, the excipient according to the present invention has a biodegradability of at least 50% according to the OECD 301F method.

It has also been demonstrated according to the invention that the incorporation of this cosmetic excipient into cosmetic formulations, in particular those for the eyes such as mascara or eyeliner, had the effect of providing the said cosmetic formulation with remarkable cosmetic qualities in addition to excellent stability of these formulations, such as ease of application, water resistance, good, and a more intense color.

Furthermore, the incorporation of this cosmetic excipient has made it possible to obtain cosmetic eye makeup formulations that can present an index of naturalness greater than 90%.

The invention relates to an eye makeup composition, characterized in that it comprises a volatile mixture of alkanes, the said volatile mixture of alkanes comprising:

- a) From 20 to 100% by mass of a fraction A which comprises at least one branched C≤10 alkane;
- b) From 0 to 80% by mass of a fraction B which comprises at least one linear or branched C>10 alkane;
  
  and in that the said volatile mixture of alkanes has a flash point below 55° C. measured according to ASTM D93 and represents a mass percentage greater than or equal to 10% relative to the total mass of the composition.

The invention also relates to an eye makeup composition, characterized in that it comprises a volatile mixture of alkanes, the said volatile mixture of alkanes comprising:

- a) From 20 to 100% by mass of a fraction A which comprises at least one branched C≤10 alkane;
- b) From 0 to 80% by mass of a fraction B which comprises at least one linear or branched C>10 alkane;
  
  and in that the said volatile mixture of alkanes has a flash point below 55° C. measured according to ASTM D93 and represents a mass percentage greater than or equal to 25% relative to the total mass of the composition.

The composition of the eye makeup according to the invention is characterized in that it comprises a mass percentage of less than or equal to 15% of isododecane relative to the total mass of the composition.

The composition of the eye makeup according to the invention is characterized in that it comprises a mass percentage of less than or equal to 10% of isododecane relative to the total mass of the composition.

Preferably, the composition of the eye makeup according to the invention is characterized in that it comprises a mass percentage of less than or equal to 5% of isododecane relative to the total mass of the composition.

Preferably, the composition of the eye makeup according to the invention is characterized in that it is free of isododecane.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that it is free of linear C₁₀alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that it is free of volatile silicones.

The composition of the eye makeup according to the invention is characterized in that it is either a mascara composition or an eyeliner composition.

Preferably, the composition of the eye makeup according to the invention is a mascara composition.

Traditionally, according to the book entitled “Conception des produits cosmétiques: la formulation”, by Anne-Marie PENSE-LHERITIER published in 2014 by LAVOISIER, there are mainly two types of mascara formulations:

- Continuous water-phase mascaras are also called “water-based mascara”
- Continuous oil phase mascaras are also called “waterproof mascara”

In the remainder of this invention, we will focus mainly on this second category of mascara formulation.

Continuous oil phase mascaras rely mainly on the use of wax or continuous oil phase emulsion. The aim is to form a continuous film on the surface of the eyelash, a film that is perfectly water-resistant.

To do this, the mascara composition includes in particular an oily phase and a pigmentary part and this composition may optionally include an aqueous phase.

The mascara composition according to the present invention is characterized in that it comprises a mass percentage of less than or equal to 10% of water relative to the total mass of the composition.

Preferably, the mascara composition according to the present invention is free of an aqueous phase.

The fatty phase includes in particular, volatile solvents, oils, surfactants, waxes, gelling agents, film-forming polymers, and preservatives.

The pigment part includes water-soluble dyes, fat-soluble dyes, pigments, pearlescent agents and glitters.

Obtaining a mascara is done by finding a subtle balance between these different ingredients.

These ingredients can be supplemented with various additives providing specific properties: polymers, absorbent powders, stabilizing additives such as antioxidants, perfume and active ingredients where appropriate.

Regarding eyeliners, their composition is similar to that of the mascaras developed above.

The various ingredients of the composition of the eye makeup according to the invention are detailed below:

Typically, volatile solvents used in the cosmetic industry are volatile silicones or volatile isoparaffins such as isododecane.

For the purposes of the present invention, the volatile solvent is defined as a “volatile mixture of alkanes”.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the flash point of the said volatile mixture of alkanes is less than or equal to 50° C.

Preferably, the composition of the eye makeup according to the invention is characterized in that the flash point of the said volatile mixture of alkanes is between 45 and 50° C.

Preferably, the composition of the eye makeup according to the invention is characterized in that the flash point of the said volatile mixture of alkanes is less than or equal to 45° C.

Even more preferably, the composition of the eye makeup according to the invention is characterized in that the flash point of the said volatile mixture of alkanes is between 40 and 45° C.

Advantageously, the composition of the eye makeup according to the invention is characterized in that the flash point of the said volatile mixture of alkanes is less than or equal to 40° C.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the flash point of the said volatile mixture of alkanes is between 35 and 40° C.

In one embodiment, the “volatile mixture of alkanes” is a mixture of alkanes free of alkanes having a carbon number greater than 16.

Preferably, the “volatile mixture of alkanes” is a mixture of alkanes free of alkanes having a carbon number greater than 15.

Preferably, the “volatile mixture of alkanes” is a mixture of alkanes free of alkanes whose number of carbon atoms is greater than 14.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the said volatile mixture of alkanes has an index of naturalness greater than or equal to 60% carbon 14 (¹⁴C) determined according to one of the following standards ASTM D6866, EN 16640 or EN 16785-1.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the said volatile mixture of alkanes has an index of naturalness greater than or equal to 70% carbon 14 (¹⁴C) determined according to one of the following standards ASTM D6866, EN 16640 or EN 16785-1.

Preferably, the composition of the eye makeup according to the invention is characterized in that the said volatile mixture of alkanes has an index of naturalness greater than or equal to 75% carbon 14 (¹⁴C) determined according to one of the following standards ASTM D6866, EN 16640 or EN 16785-1.

Preferably, the composition of the eye makeup according to the invention is characterized in that the said volatile mixture of alkanes has an index of naturalness greater than or equal to 85% carbon 14 (¹⁴C) determined according to one of the following standards ASTM D6866, EN 16640 or EN 16785-1.

Preferably, the composition of the eye makeup according to the invention is characterized in that the said volatile mixture of alkanes has an index of naturalness greater than or equal to 90% carbon 14 (¹⁴C) determined according to one of the following standards ASTM D6866, EN 16640 or EN 16785-1.

Advantageously, the volatile mixture of alkanes present in the composition according to the invention has an index of naturalness of 100% carbon 14 (¹⁴C) determined according to one of the following standards ASTM D6866, EN 16640 or EN 16785-1.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the said volatile mixture of alkanes is obtained from raw materials of plant, bacterial or animal origin.

In a preferred embodiment, the composition of the eye makeup according to the invention is characterized in that the said volatile mixture of alkanes is obtained from raw materials of plant origin.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the volatile mixture of alkanes has a biodegradability of at least 50% according to the OECD 301F method.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the volatile mixture of alkanes has a biodegradability of at least 60% according to the OECD 301F method.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the volatile mixture of alkanes has a biodegradability of between 50 and 80% according to the OECD 301F method.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the volatile mixture of alkanes has a biodegradability of between 50 and 70% according to the OECD 301F method.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the volatile mixture of alkanes has a biodegradability of between 50 and 60% according to the OECD 301F method.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the volatile mixture of alkanes has a biodegradability of between 60 and 70% according to the OECD 301F method.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the volatile mixture of alkanes has a biodegradability of between 70 and 80% according to the OECD 301F method.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of the said volatile mixture of alkanes is at least 10% relative to the total mass of the composition.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of the said volatile mixture of alkanes is at least 30% relative to the total mass of the composition.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of the said volatile mixture of alkanes is between 10 and 80% relative to the total mass of the composition.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of the said volatile mixture of alkanes is between 25 and 80% relative to the total mass of the composition.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of the said volatile mixture of alkanes is between 30 and 80% relative to the total mass of the composition.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of the said volatile mixture of alkanes is between 40 and 80% relative to the total mass of the composition.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of the said volatile mixture of alkanes is between 60 and 80% relative to the total mass of the composition.

Fraction A of the said volatile mixture of alkanes is selected from the group comprising branched C₈alkanes, branched C₉alkanes, branched C₁₀alkanes, and mixtures thereof.

Fraction A of the said volatile mixture of alkanes comprises at least one branched C≤10 alkane.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the at least one branched C≤10 alkane of the said volatile mixture of alkanes is at least one branched C₉alkane selected from the group consisting of trimethylhexanes such as for example 2,2,4-trimethylhexane (CAS 16747-26-5), 2,2,5-trimethylhexane (CAS 3522-94-9), 2,2,3-trimethylhexane (CAS 16747-25-4), 2,4,4-trimethylhexane (CAS 16747-30-1), 2,3,3-trimethylhexane (CAS 16747-28-1), 3,3,4-trimethylhexane (CAS 16747-31-2), 2,3,5-trimethylhexane (CAS 1069-53-0), 2,3,4-trimethylhexane (CAS 921-47-1).

For the purposes of the present invention, the term “trimethylhexanes” means all C₆alkanes branched by three methyl groups.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that at least one branched C≤10 alkane of the said volatile mixture of alkanes is a branched C₁₀alkane selected from the group consisting of: 2-methylnonane (CAS 871-83-0), 4-methylnonane (CAS 17301-94-9), 3-methylnonane (CAS 5911-04-6), 3-ethyloctane (CAS 5881-17-4), 2,2-dimethyloctane (CAS 15869-87-1), 2,3-dimethyloctane (CAS 7146-60-3), 2,5-dimethyloctane (CAS 15869-89-3), 3,5-dimethyloctane (CAS 15869-93-9), 4-propylheptane (CAS 3178-29-8), 3-ethyl-2-methylheptane (CAS 14676-29-0), 2,3,6-trimethylheptane (CAS 4032-93-3), 3,3,4-trimethylheptane (CAS 20278-87-9), 2,3,4-trimethylheptane (CAS 52896-95-4), 2,2,4-trimethylheptane (CAS 14720-74-2), 3,3-diethylhexane (CAS 17302-02-2), 2,2,3,3-tetramethylhexane (CAS 13475-81-5), 3-ethyl-2,2,3-trimethylpentane (CAS 52897-17-3), 2,2,3-trimethylheptane (CAS 52896-92-1), 2,3,5-trimethylheptane (CAS 20278-85-7), 3,3-diethylhexane (CAS 17302-02-2), 2,2,3,3-tetramethylhexane (CAS 13475-81-5), 3-ethyl-2,2,3-trimethylpentane (CAS 52897-17-3), 3,3,5-trimethylheptane (CAS 7154-80-5), 2,5,5-trimethylheptane (CAS 1189-99-7), 2,4,6-trimethylheptane (CAS 2613-61-8), 3,4,5-trimethylheptane (CAS 20278-89-1), 2,2,6-trimethylheptane (CAS 1190-83-6), 2,4,5-trimethylheptane (CAS 20278-84-6), 2,4,4-trimethylheptane (CAS 4032-92-2), 2,3,3-trimethylheptane (CAS 52896-93-2), 3,4,4-trimethylheptane (CAS 20278-88-0), and mixtures thereof.

For the purposes of the present invention, the term “trimethylheptanes” means all C₇alkanes branched by three methyl groups.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that at least one branched C≤10 alkane of the said volatile mixture of alkanes is a branched C₁₀alkane selected from the group consisting of trimethylheptanes such as, for example, 2,2,3-trimethylheptane (CAS 52896-92-1), 2,3,5-trimethylheptane (CAS 20278-85-7), 2,3,6-trimethylheptane (CAS 4032-93-3), 3,3,4-trimethylheptane (CAS 20278-87-9), 2,3,4-trimethylheptane (CAS 52896-95-4), 2,2,4-trimethylheptane (CAS 14720-74-2, 3,3,5-trimethylheptane (CAS 7154-80-5), 2,5,5-trimethylheptane (CAS 1189-99-7), 2,4,6-trimethylheptane (CAS 2613-61-8), 3,4,5-trimethylheptane (CAS 20278-89-1), 2,2,6-trimethylheptane (CAS 1190-83-6), 2,4,5-trimethylheptane (CAS 20278-84-6), 2,4,4-trimethylheptane (CAS 4032-92-2), 2,3,3-trimethylheptane (CAS 52896-93-2), 3,4,4-trimethylheptane (CAS 20278-88-0), and mixtures thereof.

The invention also relates to an eye makeup composition comprising a volatile mixture of alkanes as previously defined, characterized in that at least one branched C≤10 alkane of the said volatile mixture of alkanes is a trimethylheptane.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the volatile mixture of alkanes is free of branched C₈alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the volatile mixture of alkanes is free of branched C₉alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of fraction A of the volatile mixture of alkanes is at least 20% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of fraction A of the volatile mixture of alkanes is greater than 50% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of fraction A of the volatile mixture of alkanes is between 20% and 100% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of fraction A of the volatile mixture of alkanes is between 20% and 70% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of fraction A of the volatile mixture of alkanes is between 51% and 100% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of fraction A of the volatile mixture of alkanes is between 30% and 60% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of fraction A of the volatile mixture of alkanes is between 40% and 70% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of fraction A of the volatile mixture of alkanes is between 70% and 100% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of fraction A of the volatile mixture of alkanes is between 30% and 50% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of fraction A of the volatile mixture of alkanes is between 40% and 60% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of fraction A of the volatile mixture of alkanes is between 50% and 70% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of fraction A of the volatile mixture of alkanes is between 70% and 90% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of fraction A of the volatile mixture of alkanes is between 80% and 100% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of at least one branched C≤10 alkane of the said volatile mixture of alkanes is at least 20% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of at least one branched C≤10 alkane of the said volatile mixture of alkanes is greater than 50% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of at least one branched C≤10 alkane of the said volatile mixture of alkanes is between 20% and 100% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of at least one branched C≤10 alkane of the said volatile mixture of alkanes is between 20% and 70% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of at least one branched C≤10 alkane of the said volatile mixture of alkanes is between 51% and 100% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of at least one branched C≤10 alkane of the said volatile mixture of alkanes is between 30% and 60% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of at least one branched C≤10 alkane of the said volatile mixture of alkanes is between 40% and 70% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of at least one branched C≤10 alkane of the said volatile mixture of alkanes is between 70% and 100% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of at least one branched C≤10 alkane of the said volatile mixture of alkanes is between 30% and 50% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of at least one branched C≤10 alkane of the said volatile mixture of alkanes is between 40% and 60% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of at least one branched C≤10 alkane of the said volatile mixture of alkanes is between 50% and 70% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of at least one branched C≤10 alkane of the said volatile mixture of alkanes is between 70% and 90% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of at least one branched C≤10 alkane of the said volatile mixture of alkanes is between 80% and 100% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of 2,3,6-trimethylheptane (CAS 4032-93-3) of at least one branched C≤10 alkane of the said volatile mixture of alkanes is at least 20% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of 2,3,6-trimethylheptane (CAS 4032-93-3) of at least one branched C≤10 alkane of the said volatile mixture of alkanes is between 20% and 100% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of 2,3,6-trimethylheptane (CAS 4032-93-3) of at least one branched C≤10 alkane of the said volatile mixture of alkanes is between 20% and 70% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of 2,3,6-trimethylheptane (CAS 4032-93-3) of at least one branched C≤10 alkane of the said volatile mixture of alkanes is between 50% and 100% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of 2,3,6-trimethylheptane (CAS 4032-93-3) of at least one branched C≤10 alkane of the said volatile mixture of alkanes is between 51% and 100% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of 2,3,6-trimethylheptane (CAS 4032-93-3) of at least one branched C≤10 alkane of the said volatile mixture of alkanes is between 30% and 60% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of 2,3,6-trimethylheptane (CAS 4032-93-3) of at least one branched C≤10 alkane of the said volatile mixture of alkanes is between 40% and 70% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of 2,3,6-trimethylheptane (CAS 4032-93-3) of at least one branched C≤10 alkane of the said volatile mixture of alkanes is between 70% and 100% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of 2,3,6-trimethylheptane (CAS 4032-93-3) of at least one branched C≤10 alkane of the said volatile mixture of alkanes is between 30% and 50% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of 2,3,6-trimethylheptane (CAS 4032-93-3) of at least one branched C≤10 alkane of the said volatile mixture of alkanes is between 40% and 60% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of 2,3,6-trimethylheptane (CAS 4032-93-3) of at least one branched C≤10 alkane of the said volatile mixture of alkanes is between 50% and 70% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of 2,3,6-trimethylheptane (CAS 4032-93-3) of at least one branched C≤10 alkane of the said volatile mixture of alkanes is between 70% and 90% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of 2,3,6-trimethylheptane (CAS 4032-93-3) of at least one branched C≤10 alkane of the said volatile mixture of alkanes is between 80% and 100% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of 2,2,4-trimethylhexane (CAS 16747-26-5) of at least one branched C≤10 alkane of the said volatile mixture of alkanes is at least 5% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of 2,2,4-trimethylhexane (CAS 16747-26-5) of at least one branched C≤10 alkane of the said volatile mixture of alkanes is at least 10% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of 2,2,4-trimethylhexane (CAS 16747-26-5) of at least one branched C≤10 alkane of the said volatile mixture of alkanes is between 5% and 20% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of 2,2,4-trimethylhexane (CAS 16747-26-5) of at least one branched C≤10 alkane of the said volatile mixture of alkanes is between 5% and 15% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the percentage of 2,2,4-trimethylhexane (CAS 16747-26-5) of at least one branched C≤10 alkane of the said volatile mixture of alkanes is between 10% and 20% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of 2,2,4-trimethylhexane (CAS 16747-26-5) of at least one branched C≤10 alkane of the said volatile mixture of alkanes is between 10% and 15% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of 2,2,4-trimethylhexane (CAS 16747-26-5) of at least one branched C≤10 alkane of the said volatile mixture of alkanes is between 15% and 20% relative to the total mass of the said volatile mixture of alkanes.

Fraction B of the said volatile mixture of alkanes comprises at least one linear or branched C>10 alkane.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that at least one linear or branched C>10 alkane of said volatile mixture of alkanes is selected from the group comprising C₁₁, C₁₂, C₁₃, C₁₄, C₁₅, C₁₆alkanes and mixtures thereof.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is selected from the group comprising linear alkanes of C₁₁, C₁₂, C₁₃, C₁₄, C₁₅, and mixtures thereof.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is selected from the group consisting of undecane (CAS 1120-21-4), n-dodecane (CAS 112-40-3), n-tridecane (CAS 629-50-5), n-tetradecane (CAS 629-59-4), n-pentadecane (CAS 629-62-9) and mixtures thereof.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is selected from the group comprising branched C₁₂alkanes, branched C₁₃alkanes, branched C₁₄alkanes, branched C₁₅alkanes, branched C₁₆alkanes, and mixtures thereof.

- 3-methylundecane (CAS 1002-43-3), 4-methylundecane (CAS 2980-69-0), 5-methylundecane (CAS 1632-70-8), 6-methylundecane (CAS 17302-33-9), 2,4-dimethyldecane (CAS 2801-84-5), 4,4-dimethyldecane (CAS 17312-39-9), 3,5-dimethyldecane (17312-48-0), 2,5-dimethyldecane (CAS 17312-50-4), 2,3-dimethyldecane (17312-44-6), 3,3-dimethyldecane (17302-38-4), 3,7-dimethyldecane (CAS 17312-54-8), 3,4,6-trimethylnonane (CAS 62184-24-1), 3,5,6-trimethylnonane (CAS 62184-26-3), 3,5,7-trimethylnonane (CAS 62184-27-4), 2,5,7-trimethylnonane (CAS 62184-14-9), 2,5,6-trimethylnonane (CAS 62184-13-8), 2,5,7-trimethylnonane (CAS 62184-14-9), 2,5,8-trimethylnonane (CAS 49557-09-7), 3,3,4,5-tetramethyloctane (CAS 62185-21-1), 2,3,4,5-tetramethyloctane (CAS 62199-27-3), 2,2,4,5-tetramethyloctane (CAS 62183-80-6), 2,2,5,7-tetramethyloctane (CAS 62199-19-3), 2,3,4,7-tetramethyloctane (CAS 62199-29-5), 2,4,4,7-tetramethyloctane (CAS 35866-96-7), 3-ethyl-4-methylnonane (CAS 62184-45-6), 3-ethyl-4,5-dimethyloctane (CAS 62183-72-6), 2,5 dimethyl-6-ethyloctane (CAS 62183-50-0), 2,2,4,6,6-pentamethylheptane (CAS 13475-82-6) and their mixtures.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is at least one C₁₃-C₁₅mixture marketed under the name EMOGREEN L15 by SEPPIC.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of fraction B of the volatile mixture of alkanes is between 0 and 80% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of fraction B of the volatile mixture of alkanes is between 0 and 50% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of fraction B of the volatile mixture of alkanes is between 0 and 30% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of fraction B of the volatile mixture of alkanes is at least 30% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of fraction B of the volatile mixture of alkanes is between 30% and 80% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of fraction B of the volatile mixture of alkanes is between 30% and 60% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of fraction B of the volatile mixture of alkanes is between 50% and 80% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of fraction B of the volatile mixture of alkanes is between 30% and 50% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of fraction B of the volatile mixture of alkanes is between 40% and 60% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of fraction B of the volatile mixture of alkanes is between 50% and 70% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of fraction B of the volatile mixture of alkanes is between 60% and 80% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of fraction B of the volatile mixture of alkanes is between 0% and 10% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of fraction B of the volatile mixture of alkanes is between 10% and 20% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of fraction B of the volatile mixture of alkanes is between 40% and 50% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of fraction B of the volatile mixture of alkanes is between 60% and 70% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of fraction B of the volatile mixture of alkanes is between 70% and 80% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is between 0 and 80% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is between 0 and 50% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is between 0 and 30% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is at least 30% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is at least 50% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is between 30% and 80% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is between 30% and 60% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is between 50% and 80% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is between 0 and 20% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is between 10% and 30% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is between 30% and 50% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is between 40% and 60% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is between 50% and 70% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is between 60% and 80% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is between 0% and 10% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is between 10% and 20% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is between 20% and 30% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is between 40% and 50% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is between 60% and 70% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is between 70% and 80% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of n-dodecane (CAS 112-40-3) of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is between 0 and 80% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of n-dodecane (CAS 112-40-3) of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is between 0 and 50% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of n-dodecane (CAS 112-40-3) of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is between 0 and 30% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of n-dodecane (CAS 112-40-3) of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is at least 10% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of n-dodecane (CAS 112-40-3) of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is at least 30% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of n-dodecane (CAS 112-40-3) of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is between 10% and 80% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of n-dodecane (CAS 112-40-3) of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is between 30% and 80% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of n-dodecane (CAS 112-40-3) of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is between 30% and 60% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of n-dodecane (CAS 112-40-3) of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is between 50% and 80% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of n-dodecane (CAS 112-40-3) of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is between 30% and 50% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of n-dodecane (CAS 112-40-3) of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is between 40% and 60% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of n-dodecane (CAS 112-40-3) of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is between 50% and 70% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of n-dodecane (CAS 112-40-3) of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is between 60% and 80% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of n-dodecane (CAS 112-40-3) of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is between 0% and 10% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of n-dodecane (CAS 112-40-3) of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is between 10% and 20% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of n-dodecane (CAS 112-40-3) of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is between 20% and 30% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of n-dodecane (CAS 112-40-3) of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is between 40% and 50% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of n-dodecane (CAS 112-40-3) of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is between 50% and 60% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of n-dodecane (CAS 112-40-3) of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is between 60% and 70% relative to the total mass of the said volatile mixture of alkanes.

In one embodiment, the composition of the eye makeup according to the invention is characterized in that the mass percentage of n-dodecane (CAS 112-40-3) of at least one linear or branched C>10 alkane of the said volatile mixture of alkanes is between 70% and 80% relative to the total mass of the said volatile mixture of alkanes.

The invention also relates to an eye makeup composition comprising a volatile mixture of alkanes as previously defined, characterized in that the volatile mixture of alkanes comprises:

- 20 to 100% trimethylheptane (CAS 4032-93-3).
- 0 to 80% n-dodecane (CAS 112-40-3).