WO2018094623A1

WO2018094623A1 - Solid anhydrous composition comprising a hydrophobic polymer for removing makeup on the skin

Info

Publication number: WO2018094623A1
Application number: PCT/CN2016/106990
Authority: WO
Inventors: Guangchun YUAN; Ruijun Chen; Dongfang Chen
Original assignee: L'oreal
Priority date: 2016-11-23
Filing date: 2016-11-23
Publication date: 2018-05-31
Also published as: CN110062619A

Abstract

A solid anhydrous composition comprising: a) at least one hydrophobic polymer chosen from the group consisting of ester terminated poly(ester-amide), and their mixtures; b) at least one hydrocarbon-based oil; and c) at least one non-ionic surfactant. The composition is useful for the cleaning of the keratin materials and/or the makeup removal from the keratin materials.

Description

Solid anhydrous composition comprising a hydrophobic polymer for removing makeup on the skin

The present invention concerns a solid anhydrous composition, particularly useful for the cleansing of the keratin materials and/or the makeup removal from the keratin materials, comprising a hydrophobic polymer.

The invention also concerns a cosmetic process for cleansing and/or removing the makeup on the keratin materials using said composition.

In the field of cleansing and/or makeup removing compositions, "soft solid" compositions constitute a category of products that are appreciated by consumers for their efficacy on cleansing, makeup removability, rinse ability, and for their cosmetic qualities (soft, dry feeling, easy to use, etc. ) . They are known as solid compositions that soften under the effect of a stress such as spreading over the surface of the skin or, for example, by extrusion through a device with a perforated wall (grille) .

Consumers seek compositions of “soft solid” type that are used for cleansing of the skin and/or the removal of makeups, which leave the skin without any residue and with a fresh skin finish, and meanwhile, are easy to apply on the skin.

Some known soft solid compositions useful for the cleansing of the skin and/or the removal of makeup comprise silica aerogel particles, waxes, hydrocarbon-based oils and non-ionic surfactants.

However, there is still a need for solid compositions adapted to the cleansing of the skin and/or the removal of makeup with improved properties.

In particular, there is still a need for improved solid compositions which can be easily and quickly applied, i.e., easily spread on the skin.

Such compositions are preferably expected to leave the skin without any residue.

The aim of the present invention is to provide a solid and anhydrous composition with good efficacy such as makeup remove ability and rinse ability, and with improved cosmetic properties such as ease of use.

Preferably, the aim of the present invention is to provide a solid and anhydrous composition with good efficacy as described above, and with improved cosmetic properties such as ease of use, non-residue feelings, and meanwhile stable over time.

Another aim of the invention is to provide a solid and anhydrous composition which is easy to apply on keratin materials, in particular on the skin.

Another aim of the invention is to provide a solid and anhydrous composition, in particular for removing makeup from the skin, which can be carried easily in devices.

The present invention thus relates to a solid anhydrous composition comprising:

a) at least one hydrophobic polymer chosen from the group consisting of ester terminated poly (ester-amide) , and their mixtures；

b) at least one hydrocarbon-based oil； and

c) at least one non-ionic surfactant；

provided that said non-ionic surfactant is not PEG-30 dipolyhydroxystearate.

The present invention also relates to a cosmetic process for treating and/or caring for the keratin materials, in particular the skin and/or lips, characterized in that it comprises a step of applying to the surface of the keratin materials at least one composition according to the invention.

The present invention also relates to a cosmetic process for cleansing and/or removing the makeup on the keratin materials, which comprises a step of applying to the surface of a keratin material, in particular the skin, at least one composition according to the invention.

The inventors discovered that with the compositions according to the invention, the spread-ability and application properties on the keratin materials were improved, with less time required to melt and apply the compositions, compared to other solid compositions.

Besides, the skin finish is also improved, with the absence of a residue feeling after rinsing.

Advantageously, the compositions according to the invention may be transparent, thereby presenting a pleasant appearance to the compositions.

The compositions according to the invention are also stable.

Besides, the compositions have a desired hardness so as to be conditioned in a jar, a device equipped with an open-work wall, a device equipped with a ball applicator, or in the form of wands (sticks) .

Definitions

The term "solid" composition means the form of the composition at 20℃, and in particular the term "solid" means a composition whose hardness at 20℃ and at atmospheric pressure (760 mmHg) is greater than or equal to 30 Nm^-1 when it is measured according to the protocol described below.

The hardness of a solid composition is measured according to the following protocol.

The composition whose hardness is to be determined is stored at 20℃ for 24 hours before measuring the hardness. The hardness may be measured at 20℃ via the “cheese wire” method, which consists in transversely cutting a wand of product, which is preferably a circular cylinder, by means of a rigid tungsten wire 250 μm in diameter, by moving the wire relative to the stick at a speed of 100 mm/minute.

The hardness of the samples of compositions of the invention, expressed in Nm^-1, is measured using a DFGS2 tensile testing machine from the company Indelco-Chatillon. The measurement is repeated three times and then averaged. The average of the three values read using the tensile testing machine mentioned above, noted Y, is given in grams. This average is converted into newtons and then divided by L which represents the longest distance through which the wire passes. In the case of a cylindrical wand, L is equal to the diameter (in metres) .

The hardness is converted into Nm^-1 by the equation below:

(Y × 10^-3 × 9.8) /L

For a measurement at a different temperature, the stick is stored for 24 hours at this new temperature before the measurement.

According to a preferred embodiment, the composition of the present invention has a hardness of greater than or equal to 40 Nm^-1, more preferably ranging from 50 Nm^-1 to 300 Nm^-1, even more preferably ranging from 60 Nm^-1 to 120 Nm^-1.

The term "anhydrous composition" means a composition containing less than 2％by weight of water, or even less than 0.5％water, and especially free of water, the water not being added during the preparation of the composition but corresponding to the residual water provided by the mixed ingredients.

By “rinse ability” , it may be meant the ease of being rinsed off by water after applying the composition of the present invention onto the skin.

By “non-residue feeling” , it may be meant the feeling of the skin being dry and fresh after rinsing off the composition of the present invention. In one embodiment, there is no greasy or waxy feeling of the skin after rinsing off the composition of the present invention.

By “spread-ability” , it may be meant the ease of application and/or of spread of the compositions on the keratin materials (the solid composition “melt” when applied on the keratin materials) .

The term "keratin materials" means the skin (of the body, face and around the eyes) , hair, eyelashes, eyebrows, bodily hair, nails, lips or mucous membranes, preferably skin.

The term “transparent” may be represented by the turbidity of the composition of the present invention, which may be measured according to the NTU method using a 2100P model turbidimeter from the company HACH, at room temperature.

Advantageously, the turbidity of the solid anhydrous composition of the invention is less than 400 NTU units and preferably between 50 and 350 NTU units.

Detailed description of the invention

The composition of the present invention aims at solving the problems as listed above.

More particularly, the composition of the present invention is a solid anhydrous composition for cleansing and/or removing makeup on keratin materials.

Preferably, the composition of the present invention is a cosmetic composition, more preferably a cosmetic composition for removing makeup from the keratin materials, in particular from the skin. In a particular embodiment, the makeup is removed from the skin of the face.

In one embodiment, the composition according to the invention does not comprise a wax. In one embodiment, the composition according to the invention is in the form of a gel. In one embodiment, the composition according to the invention is transparent.

Hydrophobic polymer

The composition according to the invention comprises at least one hydrophobic polymer chosen from ester terminated poly (ester-amide) .

By “hydrophobic” it may be meant a polymer which is repelled from water, i.e. which is not miscible with water.

By “ester terminated” polymer it may be meant a polymer comprising at least one chemical function ester (Ra-C (O) -O-R’a) as a terminal moiety. For example, such polymers and their methods of preparation are described in the WO 02/092663 patent application.

In one embodiment, said polymer comprises at least one dimer dilinoleate unit, optionally hydrogenated. Preferably, the hydrophobic polymer is bis-stearyl ethylenediamine/neopentyl glycol/hydrogenated dimer dilinoleate copolymer. Particular mention may be made of bis-stearyl ethylenediamine/neopentyl glycol/hydrogenated dimer dilinoleate copolymer, also called polyamide-8, commercialized by Arizona chemical under the name Sylvaclear^TM C75V or by Croda, Inc., under the name OleoCraft LP-20 (CAS RN is 678991-29-2) .

In one embodiment, the composition according to the invention comprises only one hydrophobic polymer. In a particular embodiment, the composition of the invention does not comprise an ester terminated polyamide polymer such as ethylenediamine stearyl dimer dilinoleate copolymer.

In one embodiment, the amount of the hydrophobic polymer is comprised between 1％and 20％by weight, based on the total weight of the composition, preferably between 5％and 15％by weight, for example about 10％by weight, based on the total weight of the composition.

Hydrocarbon-based oils

According to the invention, the composition comprises at least one hydrocarbon-based oil.

The term “oil” means a fatty substance that is liquid at room temperature (25℃) and atmospheric pressure (760 mmHg, i.e. 105 Pa) . The oil may be volatile or non-volatile.

For the purposes of the invention, the term “volatile oil” means an oil that is capable of evaporating on contact with the skin or the keratin fibre in less than one hour, at room temperature and atmospheric pressure. The volatile oils of the invention are volatile cosmetic oils, which are liquid at room temperature, having a non-zero vapour pressure, at room temperature and atmospheric pressure, ranging in particular from 0.13 Pa to 40 000 Pa (10^-3 to 300 mmHg) , in particular ranging from 1.3 Pa to 13 000 Pa (0.01 to 100 mmHg) and more particularly ranging from 1.3 Pa to 1300 Pa (0.01 to 10 mmHg) . The term “non-volatile oil” means an oil that remains on the skin or the keratin fibre at room temperature and atmospheric pressure for at least several hours, and that especially has a vapour pressure of less than 10^-3 mmHg (0.13 Pa) .

The oils in accordance with the invention are preferably selected from any cosmetically acceptable oil, especially mineral, animal, plant or synthetic oils, or a mixture thereof.

The term “hydrocarbon-based oil” means an oil mainly containing carbon and hydrogen atoms and possibly one or more functions selected from hydroxyl, ester, ether and carboxylic functions. Generally, the oil has a viscosity of from 0.5 to 100 000 mPa. s, preferably from 50 to 50 000 mPa. sand more preferably from 100 to 300 000 mPa. s.

As examples of volatile hydrocarbon-based oils that may be used in the invention, mention may be made of:

-volatile hydrocarbon-based oils selected from hydrocarbon-based oils containing from 8 to 16 carbon atoms, and especially C₈-C₁₆ isoalkanes of petroleum origin (also known as isoparaffins) , for instance isododecane (also known as 2, 2, 4, 4, 6-pentamethylheptane) , isodecane and isohexadecane, for example the oils sold under the trade names Isopar or Permethyl, branched C₈-C₁₆ esters and isohexyl neopentanoate, and mixtures thereof. Other volatile hydrocarbon-based oils, for instance petroleum distillates, especially those sold under the name Shell Solt by the company Shell, may also be used； volatile linear alkanes, such as those described in patent application DE10 2008 012 457 from the company Cognis.

As examples of non-volatile hydrocarbon-based oils that may be used in the invention, mention may be made of:

-hydrocarbon-based oils of animal origin, such as perhydrosqualene；

-hydrocarbon-based plant oils such as liquid triglycerides of fatty acids of 4 to 24 carbon atoms, for instance heptanoic or octanoic acid triglycerides, or wheatgerm oil, olive oil, sweet almond oil, palm oil, rapeseed oil, cottonseed oil, alfalfa oil, poppy oil, pumpkin oil, marrow oil, blackcurrant oil, evening primrose oil, millet oil, barley oil, quinoa oil, rye oil, safflower oil, candlenut oil, passion flower oil, musk rose oil, sunflower oil, corn oil, soybean oil, grapeseed oil, sesame seed oil, hazelnut oil, apricot oil, macadamia oil, castor oil, avocado oil, caprylic/capric acid triglycerides, for instance those sold by the company Stéarineries Dubois or those sold under the names Miglyol 810, 812 and 818 by the company Dynamit Nobel, jojoba oil and shea butter oil,

-linear or branched hydrocarbons, of mineral or synthetic origin, such as liquid paraffins and derivatives thereof, petroleum jelly, polydecenes, polybutenes, hydrogenated polyisobutene such as Parleam, and squalane,

-synthetic ethers containing from 10 to 40 carbon atoms；

-synthetic esters, especially of fatty acids, for instance the oils of formula R₁COOR₂ in which R₁ represents a linear or branched higher fatty acid residue containing from 1 to 40 carbon atoms and R₂ represents a hydrocarbon-based chain, which is especially branched, containing from 1 to 40 carbon atoms, with R₁ + R₂ ≥ 10, for instance purcellin oil (cetostearyl octanoate) , isononyl isononanoate, isopropyl myristate, isopropyl palmitate, C₁₂-C₁₅ alkyl benzoates, hexyl laurate, diisopropyl adipate, isononyl isononanoate, 2-ethylhexyl palmitate, 2-octyldodecyl stearate, 2-octyldodecyl erucate, isostearyl isostearate or tridecyl trimellitate； alcohol or polyalcohol octanoates, decanoates or ricinoleates, for instance propylene glycol dioctanoate； hydroxylated esters, for instance isostearyl lactate, octyl hydroxystearate, octyldodecyl hydroxystearate, diisostearyl malate, triisocetyl citrate, and fatty alcohol heptanoates, octanoates or decanoates； polyol esters, for instance propylene glycol dioctanoate, neopentyl glycol diheptanoate or diethylene glycol diisononanoate； and pentaerythritol esters, for instance pentaerythrityl tetraisostearate,

-fatty alcohols that are liquid at room temperature, containing a branched and/or unsaturated carbon-based chain containing from 12 to 26 carbon atoms, for instance octyldodecanol, isostearyl alcohol, 2-butyloctanol, 2-hexyldecanol, 2-undecylpentadecanol or oleyl alcohol,

-higher fatty acids such as oleic acid, linoleic acid or linolenic acid；

-carbonates；

-acetates；

-citrates.

In one embodiment, the hydrocarbon-based oil is chosen from the group consisting of C₈-C₁₆ isoalkanes of petroleum origin, branched C₈-C₁₆ esters and isohexyl neopentanoate, hydrocarbon-based non-volatile oils of animal origin or plant oils, linear or branched hydrocarbons of mineral or synthetic origin, synthetic ethers containing from 10 to 40 carbon atoms, synthetic esters, fatty alcohols that are liquid at 25℃, higher fatty acids such as oleic acid, linoleic acid, carbonates, acetates, citrates, and mixtures thereof； preferably from synthetic esters of fatty acids.

In a particular embodiment, hydrocarbon-based oil is chosen from the group consisting of:

-volatile hydrocarbon-based oils selected from hydrocarbon-based oils containing from 8 to 16 carbon atoms, and especially C₈-C₁₆ isoalkanes of petroleum origin, such as isododecane, isodecane and isohexadecane；

-linear or branched hydrocarbons of mineral or synthetic origin, such as liquid paraffins and derivatives thereof, petroleum jelly, polydecenes, polybutenes, hydrogenated polyisobutene and squalene； and

-synthetic esters of fatty acids,

and theirs mixtures.

Using the above-mentioned hydrocarbon-based oils, the composition according to the invention is advantageously transparent.

In another particular embodiment, the hydrocarbon-based oil is chosen from the group consisting of synthetic esters of fatty acids for instance cetostearyl octanoate, isononyl isononanoate, isopropyl myristate, isopropyl palmitate, C₁₂-C₁₅ alkyl benzoates, hexyl laurate, diisopropyl adipate, isononyl isononanoate, 2-ethylhexyl palmitate, 2-octyldodecyl stearate, 2-octyldodecyl erucate, isostearyl isostearate or tridecyl trimellitate； alcohol or polyalcohol octanoates, decanoates or ricinoleates, for instance propylene glycol dioctanoate； hydroxylated esters, for instance isostearyl lactate, octyl hydroxystearate, octyldodecyl hydroxystearate, diisostearyl malate, triisocetyl citrate, and fatty alcohol heptanoates, octanoates or decanoates； polyol esters, for instance propylene glycol dioctanoate, neopentyl glycol diheptanoate or diethylene glycol diisononanoate； and pentaerythritol esters, for instance pentaerythrityl tetraisostearate, or a mixture thereof.

As illustrations of oils that are suitable for the invention, mention may be made especially of non-volatile hydrocarbon-based oils, for instance synthetic esters. Mention may be made of such oils, for example, 2-ethylhexyl palmitate, which is sold by the company Stearinerie Dubois under the tradename Palmitate D’ethyl 2 Hexyle, or

C24 sold by the company BASF.

Preferably, the hydrocarbon-based oil is a synthetic ester of a fatty acid, more preferably 2-ethylhexyl palmitate.

In one embodiment, the amount of the hydrocarbon-based oil in the composition is comprised between 55％and 98％by weight, based on the total weight of the composition； preferably between 65％and 95％by weight, more preferably between 80％and 90％by weight, for example about 85％by weight, based on the total weight of the composition.

Non-ionic surfactants

Surfactants are usually organic compounds that are amphiphilic, meaning that they contain both hydrophobic groups (their tails) and hydrophilic groups (their heads) . By “non-ionic surfactant” is meant a surfactant which has no charged groups in its head (i.e. the charge of the hydrophilic group is neutral) .

The composition of the present invention comprises at least one non-ionic surfactant provided that said non-ionic surfactant is not PEG-30 dipolyhydroxystearate (i.e. the composition according to the invention does not comprise PEG-30 dipolyhydroxystearate) . PEG-30 dipolyhydroxystearate is the polyethylene glycol diester of polyhydroxystearic acid.

In one embodiment, the composition of the present invention comprises at least one non-ionic surfactant provided that said non-ionic surfactant has not the following formula (I) :

wherein R and R’represent independently from each other a C10-C20 alkyl group, preferably a C17alkyl group, said alkyl group being substituted by at least one hydroxyl group, and wherein n is an integer comprised between 20 and 40, preferably about 30.

Preferably R and R’are derived from the polyhydroxystearic acid. In one embodiment, R and R’have the following formula (II) and n is about 30:

CH₃- (CH₂) ₅-CH (OH) - (CH₂) ₁₀- (II) .

In a particular embodiment, the composition of the invention does not comprise PEG-30 dipolyhydroxystearate as mentioned above and diisostearyl malate.

More particularly, the composition according to the invention comprises at least one non-ionic surfactant chosen from oxyalkylenated fatty acid esters of glycerol.

According to the present invention, the oxyalkylene chain of the oxyalkylenated fatty acid esters of glycerol is preferably an oxyethylene chain.

More preferably, it may contain, for example, from 1 to 150 oxyalkylene and especially oxyethylene groups, and preferably from 2 to 100 oxyalkylene and especially oxyethylene groups.

The composition may also contain one or more other nonionic emulsifying surfactants.

The surfactant or the mixture of surfactants preferably has an HLB (hydrophilic-lipophilic balance) ranging from 5 to 20 and preferably from 8 to 18, and it should be soluble in the oily phase. Surfactants with an HLB of greater than 20 may also be used, provided that one or more other surfactants are added thereto such that the HLB of the mixture ranges from 5 to 15.

Examples of oxyalkylenated fatty acid esters of glycerol that may be mentioned more particularly include (INCI name) PEG-20 glyceryl triisostearate, PEG-7 glyceryl cocoate, polyglyceryl-2 oleate, and mixtures thereof.

As illustration of the non-ionic surfactants, mentions may be made of PEG-20 glyceryl triisostearate, such as those sold by the company Nihon Emulsion under the tradename Emalex Gwis-320EX.

Examples of other non-ionic surfactants that may be mentioned include oxyalkylenated fatty acid ester of sorbitan, esters of fatty acids and of polyols； oxyalkylenated or non-oxyalkylenated ethers of fatty alcohols and of polyols, and mixtures thereof.

Surfactants of this type that may be mentioned more particularly include:

-oxyethylenated fatty acid esters of sorbitan such as (INCI name) Polysorbate 20, Polysorbate 65, Polysorbate 85, PEG-5 sorbitan isostearate, PEG-20 sorbitan triisostearate, PEG-20 sorbitan isostearate, PEG-40 sorbitan septaoleate, PEG-20 sorbitan tetraoleate and PEG-20 sorbitan trioleate；

-fatty acid esters of polyglycerol such as (INCI name) Polyglyceryl-3 Triisostearate, Polyglyceryl-10 Diisostearate, Polyglyceryl-6 Isostearate, Polyglyceryl-3 Diisostearate, Polyglyceryl-10 Trioleate or Polyglyceryl-10 Trilaurate；

-fatty acid esters of polyethylene glycol such as (INCI name) PEG-8 Stearate, PEG-6 Oleate, PEG-6 Isostearate, PEG-12 Isostearate, PEG-12 Diisostearate, PEG-8 Isostearate, PEG-8 Diisostearate or PEG-10 Isostearate；

-oxyalkylenated, especially oxyethylenated and/or oxypropylenated, more particularly oxyethylenated, fatty alkyl ethers, for instance ceteareth-12 and ceteareth-20 (INCI name) , and also mixtures containing them, for instance the mixture sold under the name Emulgade CM by the company Cognis (mixture of cetearyl isononanoate, ceteareth-20, cetearyl alcohol, glyceryl stearate, glycerol, ceteareth-12 and cetyl palmitate) ；

-and mixtures thereof.

Mentions may be made of polysorbate 20, such as those sold by the company Croda under the tradename Tween^TM 20-LQ- (AP) .

In one embodiment, the amount of the non-ionic surfactant in the composition according to the invention is comprised between 1％and 20％by weight, based on the total weight of the composition, preferably between 1％and 10％by weight, for example about 5％by weight, based on the total weight of the composition.

Adjuvants

In a known manner, the composition of the invention may also contain adjuvants that are common in cosmetics and/or dermatology, such as preserving agents, antioxidants, complexing agents, pH modifiers (acidic or basic) , fragrances, fillers, bactericides, odour absorbers, colorants (pigments and dyes) , film-forming polymers, additional surfactants such as anionic, amphoteric, cationic, or nonoinic surfactants； additional oils such as silicone oil, or fluoro oils, thickeners and/or gelling agents and active ingredients.

The term "silicone oil" means an oil comprising in its structure carbon atoms and at least one silicon atom.

The term "fluoro oil" means partially hydrocarbon-based and/or silicone-based oils comprising carbon atoms and fluorine atoms.

As examples of non-volatile silicone oils, mention may be made of linear or cyclic non-volatile polydimethylsiloxanes (PDMS) ； polydimethylsiloxanes comprising alkyl, alkoxy or phenyl groups, which are pendant or at the end of a silicone chain, these groups containing from 2 to 24 carbon atoms； phenyl silicones, for instance phenyl trimethicones, phenyl dimethicones, phenyl trimethylsiloxy diphenyl siloxanes, diphenyl dimethicones, diphenyl methyldiphenyl trisiloxanes and 2-phenylethyl trimethylsiloxy silicates, and mixtures thereof.

Needless to say, a person skilled in the art will take care to select this or these optional additional compound (s) , and/or the amount thereof, such that the properties of the composition according to the invention are not, or are not substantially, adversely affected by the envisaged addition.

Galenical forms

The compositions according to the invention may be in the form of a cream, a balm, pomade or a gel whose hardness may vary as a function of the desired application, the region of human keratin material to be treated and the desired conditioning.

The compositions according to the invention may be conditioned in a jar； in a device equipped with an open-work wall, especially a grille； in a device equipped with a ball applicator ( “roll-on” ) ； in the form of wands (sticks) . In this regard, they contain the ingredients generally used in products of this type, which are well known to those skilled in the art.

In a particular embodiment, the composition according to the invention comprises, based on the total weight of the composition:

-from 1％to 20％by weight of at least one hydrophobic polymer chosen from ester terminated poly (ester-amide) ；

-from 1％to 20％by weight of at least one non-ionic surfactant chosen from oxyalkylenated fatty acid esters of glycerol； and

-at least one hydrocarbon-based oil.

More particularly, the present invention relates to a solid anhydrous composition for cleansing and/or makeup removing of keratin materials, in particular the skin, comprising, based on the total weight of the composition:

-from 1％to 20％by weight of at least one non-ionic surfactant chosen from oxyalkylenated fatty acid ester of glycerol； and

-at least one hydrocarbon-based oil.

In one embodiment, the composition of the invention comprises:

-bis-stearyl ethylenediamine/neopentyl glycol/hydrogenated dimer dilinoleate copolymer,

-a synthetic ester of a fatty acid such as 2-ethylhexyl palmitate, and

-PEG-20 glyceryl triisostearate.

In one embodiment, the composition of the invention comprises:

-10 ％by weight of bis-stearyl ethylenediamine/neopentyl glycol/hydrogenated dimer dilinoleate copolymer,

-2-ethylhexyl palmitate, and

-5 ％by weight of PEG-20 glyceryl triisostearate,

based on the total weight of the composition.

The present invention also relates to a cosmetic process for treating and/or caring for keratin materials, characterized in that it comprises applying to the surface of the keratin material at least one composition as defined previously.

The present invention also relates to a cosmetic process for removing the makeup on the keratin materials, which comprises applying to the surface of a keratin material at least one composition as defined previously.

The composition according to the invention has improved spread-ability, makeup remove ability, rinse ability and skin finish.

Besides, the composition has a desired hardness so as to be conditioned in a jar, a device equipped with an open-work wall, a device equipped with a ball applicator, or in the form of wands (sticks) .

In the patent application, unless specifically mentioned otherwise, the contents are expressed on a weight basis relative to the total weight of the composition.

The examples that follow are aimed at illustrating the compositions and processes according to this invention, but are not in any way a limitation of the scope of the invention.

All the parts and percentages in the examples are given on a weight basis and all the measurements were obtained at about 25℃, unless otherwise mentioned.

EXAMPLES

Example 1: Preparation examples

The following formulations were prepared as follows:

Ex. 2: the POLYAMIDE-8 is replaced by Synthetic wax；

Ex. 3: the polyamide-8 is replaced by polymer Uniclear from Croda.

Method of preparation:

The compositions of examples 1 to 3 were prepared following the steps of:

1. Mixing the phase A with VMI mixer under 85℃ for 1 hour；

2. Mixing phase B to phase A under 85℃ until homogeneous；

3. Adding phase C to the mixture obtained above under 85℃ until homogeneous.

Then the mixture was hot poured to the mould to form solid makeup removal sticks.

The composition of example 1 is a transparent solid stick, whereas the composition of example 2 is white, and example 3 is translucent.

Example 5: Evaluation example

Evaluation of efficacy such as makeup remove ability and rinse ability, and cosmetic properties such as ease of use, non-residue feeling of the compositions of examples 1 to 3 was performed.

The compositions of examples 1 to 3 were kept under room temperature (25℃) and 45℃ for 2 months.

The compositions of examples 1 to 3 were then applied on the madeup faical skins of 6 consumers as makeup removers, 30 minutes after makeup BB cream (OAP Revitalift UV Block BB) were applied on the skin. The consumers massaged the facial skin where the compositions of examples 1 to 3 were applied on for 30 seconds. Consumers then rinsed off the facial skin by water (37℃) , then the scores on the spead-ability, makeup removability, rinse ability, and non-residue feelings were given by the consumers.

In particular, in terms of non-residue feeling, consumers considered that the non-residue feeling is acceptable (score 3 and above) if no further cleanser product is needed.

5； very good performance；

4； good performance；

3； acceptable performance；

2. poor performane；

1. very poor performance.

The results are listed as follow:

It was observed that comparing to compositions of examples 2 and 3, the composition of the invention Ex. 1 shows improvements on cosmetic properties including ease of application and non-residue feeling. Besides, the example 1 shows good efficacy. Moreover, the composition of example 1 is transparent.

While illustrative examples of the invention have been described above, it is, of course, understood that many and various modifications will be apparent to those of ordinary skill in the relevant art, or may become apparent as the art develops, in the light of the foregoing description. Such modifications are contemplated as being within the spirit and scope of the invention or inventions disclosed in this specification.

Claims

A solid anhydrous composition comprising:

a) at least one hydrophobic polymer chosen from the group consisting of ester terminated poly (ester-amide) , and their mixtures；

b) at least one hydrocarbon-based oil； and

c) at least one non-ionic surfactant；

provided that said non-ionic surfactant is not PEG-30 dipolyhydroxystearate.
The composition according to claim 1, wherein the hydrophobic ester terminated poly (ester-amide) polymer comprises at least one dimer dilinoleate unit； preferably the hydrophobic polymer is bis-stearyl ethylenediamine/neopentyl glycol/hydrogenated dimer dilinoleate copolymer.
The composition according to any one of the preceding claims, wherein the amount of the hydrophobic polymer is comprised between 1％ and 20％ by weight, based on the total weight of the composition, preferably between 5％ and 15％ by weight, based on the total weight of the composition.
The composition according to any one of the preceding claims, wherein the non-ionic surfactant is chosen from the oxyalkylenated fatty acid esters of glycerol； preferably chosen from the group consisting of PEG-20 glyceryl triisostearate, PEG-7 glyceryl cocoate, polyglyceryl-2 oleate, and mixtures thereof.
The composition according to any one of the preceding claims, wherein the amount of the non-ionic surfactant is comprised between 1％ and 20％ by weight, based on the total weight of the composition, preferably between 1％ and 10％ by weight, based on the total weight of the composition.
The composition according to any one of the preceding claims, wherein the hydrocarbon-based oil is chosen from the group consisting of C₈-C₁₆ isoalkanes of petroleum origin, branched C₈-C₁₆ esters and isohexyl neopentanoate, hydrocarbon-based non-volatile oils of animal origin or plant oils, linear or branched hydrocarbons of mineral or synthetic origin, synthetic ethers containing from 10 to 40 carbon atoms, synthetic esters, fatty alcohols that are liquid at 25℃, higher fatty acids such as oleic acid, linoleic acid, carbonates, acetates, citrates, and mixtures thereof； preferably from synthetic esters of fatty acids.
The composition according to any one of the preceding claims, wherein the amount of the hydrocarbon-based oil is comprised between 55％ and 98％ by weight, based on the total weight of the composition； preferably between 65％ and 95％ by weight, more preferably between 80％ and 90％ by weight, based on the total weight of the composition.
The solid anhydrous composition according to claim 1, comprising, relative to the total weight of the composition:

a) from 1％ to 20％ by weight of at least one hydrophobic polymer chosen from the group consisting of ester terminated poly (ester-amide) ；

b) from 1％ to 20％ by weight of at least one non-ionic surfactant chosen from the group consisting of oxyalkylenated fatty acid esters of glycerol； and

c) at least one hydrocarbon-based oil.
The composition according to any one of the preceding claims, wherein said composition is a cosmetic composition.
Cosmetic use of a composition according to any one of the preceding claims, for removing makeup from keratin materials, in particular from the skin.
Cosmetic process for cleansing and/or removing the makeup on the keratin materials, which comprises a step of applying to the surface of a keratin material, in particular the skin, at least one composition as defined in any of the preceding claims.