Leave-on composition for caring for keratin materials
A leave-on cosmetic composition combining nonionic surfactants, polyhydroxy acids, and alkanolamines addresses the issues of stickiness and crystallization in existing products, delivering effective skin radiance and smoothness.
Patent Information
- Application Number
- PCT/CN2023/131221
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-11-13
- Publication Date
- 2025-05-22
AI Technical Summary
Existing cosmetic products for providing skin radiance and smoothness often suffer from stickiness and crystallization issues, failing to meet consumer expectations for a non-sticky, stable product.
A leave-on composition comprising at least one nonionic surfactant, such as fatty acid esters of polyglycerol, polyoxyalkylenated polyol fatty acid esters, and alkoxylated fatty alcohols, combined with polyhydroxy acids and alkanolamines, which provides skin radiance and smoothness without crystallization or excessive stickiness.
The composition effectively provides skin radiance and smoothness while avoiding crystallization and stickiness, ensuring a comfortable and stable cosmetic experience.
Smart Images

Figure PCTCN2023131221-FTAPPB-I100001 
Figure PCTCN2023131221-FTAPPB-I100002 
Figure PCTCN2023131221-FTAPPB-I100003
Abstract
Description
LEAVE-ON COMPOSITION FOR CARING FOR KERATIN MATERIALSTECHNICAL FIELD
[0001] The present invention relates to a cosmetic composition. In particular, the present invention relates to a leave-on composition for caring for keratin materials. The present invention also relates to a non-therapeutic method for caring for keratin materials.BACKGROUND ART
[0002] Consumers around the world are looking for novel cosmetic products for improving the appearance of keratin materials and especially the skin, in particular providing the skin with an optical cosmetic effect, such as smoothness and good radiance.
[0003] Cosmetic products being able to bring skin the optical effects as mentioned above are known, for example, antiaging water in the cosmetic industry, which is a technology combined permeation system and soft peeling engine to meet consumer needs of radiance and smoothness.
[0004] However, some products for providing the skin radiance and smoothness are still not satisfying. For example, some products are sticky, which delivers consumers unpleasant feeling.
[0005] Some products have hard crystallization particles on the bottleneck.
[0006] It is desired that cosmetic composition for providing the skin radiance and smoothness are not too sticky, even not sticky.
[0007] It is also desired that such cosmetic compositions don’t have crystallization particles after long time shelf placement.
[0008] Thus, there is still a need to formulate a composition for caring for keratin materials, especially the skin which can provide the keratin materials, especially the skin radiance and smoothness, and is no crystallization and not too sticky, even not sticky.SUMMARY OF THE INVENTION
[0009] It is an object of the present invention to develop a composition for caring for keratin materials which can provide the keratin materials and especially the skin radiance and smoothness, and is no crystallization and not too sticky, even not sticky.
[0010] It is another object of the present invention to provide a non-therapeutic method for caring for the keratin materials, especially for skin with above compositions.
[0011] The inventors have now discovered that it is possible to formulate a composition for caring for keratin materials which can provide the skin radiance and smoothness, and is no crystallization and not too sticky, even not sticky.
[0012] Accordingly, in a first aspect, the present invention provides a leave-on composition, preferably for caring for keratin materials comprising:
[0013] (i) at least one nonionic surfactant selected from fatty acid esters of polyglycerol, polyoxyalkylenated polyol fatty acid esters, alkoxylated fatty alcohols, and a combination thereof;
[0014] (ii) at least one polyhydroxy acid; and
[0015] (iii) at least one alkanolamine.
[0016] The composition according to the present invention can be used to care for the keratin materials, in particular, to provide the keratin materials radiance and smoothness, due to the presence of the at least one polyhydroxy acid.
[0017] The inventors have found that the composition according to the present invention is no crystallization and not too sticky.
[0018] As used herein, the term “sticky” means a property which provides a tacky feeling to the skin.
[0019] In a second aspect, the present invention provides a non-therapeutic method for caring for keratin materials, comprising applying the composition according to the first aspect of the present invention to the keratin materials.
[0020] Other advantages of the present invention will emerge more clearly on reading the description and the examples that follow.BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Implementations of the present invention will now be described, by way of example only, with reference to the attached figures, wherein:
[0022] Fig. 1 shows the stickiness of compositions of invention example 1 and comparative example 1 as determined by a texture analyzer.DETAILED DESCRIPTION OF THE INVENTION
[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art the present invention belongs to. When the definition of a term in the present description conflicts with the meaning as commonly understood by those skilled in the art the present invention belongs to, the definition described herein shall apply.
[0024] In that which follows and unless otherwise indicated, the limits of a range of values are included within this range, in particular in the expressions "between... and…" and "from... to... " .
[0025] Moreover, the expression "at least one" used in the present description is equivalent to the expression "one or more" .
[0026] Throughout the instant application, the term “comprising” is to be interpreted as encompassing all specifically mentioned features as well as optional, additional, unspecified ones. As used herein, the use of the term “comprising” also discloses the embodiment wherein no features other than the specifically mentioned features are present (i.e. “consisting of” ) .
[0027] Unless otherwise specified, all numerical values expressing amount of ingredients and the like which are used in the description and claims are to be understood as being modified by the term “about” . Accordingly, unless indicated to the contrary, the numerical values and parameters described herein are approximate values which are capable of being changed according to the desired purpose as required.
[0028] For the purposes of the present invention, the term “keratin materials” is intended to cover human skin and mucous membranes such as the lips. Facial skin is most particularly considered according to the present invention.
[0029] All percentages in the present invention refer to weight percentage, unless otherwise specified.
[0030] The composition according to the present invention comprises:
[0031] (i) at least one nonionic surfactant selected from fatty acid esters of polyglycerol, polyoxyalkylenated polyol fatty acid esters, alkoxylated fatty alcohols, and a combination thereof;
[0032] (ii) at least one polyhydroxy acid; and
[0033] (iii) at least one alkanolamine.
[0034] Nonionic surfactants
[0035] According to the first aspect, the composition of the present invention comprises at least one nonionic surfactant selected from fatty acid esters of polyglycerol, polyoxyalkylenated polyol fatty acid esters, alkoxylated fatty alcohols, and a combination thereof.
[0036] Fatty acid estersof polyglycerol
[0037] Preferably, the fatty acid ester of polyglycerol (also known as polyglycerol fatty acid ester, PGFE) is selected from compounds of formula (I) ,
[0038] wherein:
[0039] R represents a linear or branched C5-C30 alkyl or alkenyl;
[0040] n is an integer ranging from 2 to 30.
[0041] Preferably, for the purpose of the present invention, in the formula (I) ,
[0042] R represents a linear or branched C8-C28 alkyl or alkenyl, preferably a linear or branched C10-C22 alkyl or alkenyl;
[0043] n is an integer ranging from 2 to 20, preferably from 4 to 10.
[0044] Examples of suitable PGFE surfactants are Polyglyceryl-10 Caprate, Polyglyceryl-10 Laurate, Polyglyceryl-10 Dilaurate, Polyglyceryl-10 Myristate, Polyglyceryl-10 Dimyristate, Polyglyceryl-10 Oleate, Polyglyceryl-10 Dioleate, Polyglyceryl-10 stearate, Polyglyceryl-10 Isostearate, Polyglyceryl-10 Diisostearate, Polyglyceryl-5 Laurate, Polyglyceryl-5 Dilaurate, Polyglyceryl-5 Myristate, Polyglyceryl-5 Trimyristate, Polyglyceryl-5 Oleate, or Polyglyceryl-5 Dioleate, Polyglyceryl-5 Stearate, Polyglyceryl-6 Oleate, and Polyglyceryl-6 Distearate.
[0045] Particularly, the fatty acid esters of polyglycerol suitable for the present invention are compounds selected from the group consisting of Polyglyceryl-5 laurate, Polyglyceryl-5 Myristate, Polyglyceryl-5 Oleate, Polyglyceryl-5 Stearate, Polyglyceryl-6 Oleate, Polyglyceryl-6 Distearate, Polyglyceryl-10 Caprate, Polyglyceryl-10 Laurate, Polyglyceryl-10 Myristate, Polyglyceryl-10 Oleate, Polyglyceryl-10 stearate, Polyglyceryl-10 Isostearate, or a combination thereof.
[0046] More particularly, the fatty acid esters of polyglycerol are selected frompolyglyceryl-5 laurate, polyglyceryl-6 oleate, polyglyceryl-6 distearate, and a combination thereof.
[0047] These compounds are commercially available. For example, mentions can be made to the compounds sold by the company Taiyo Kagaku under the trade names: Sunsoft A-12E or Sunsoft A-121E-C (Polyglyceryl-5 laurate) , Sunsoft A-14E (Polyglyceryl-5 Myristate) , Sunsoft Q-17F (polyglyceryl-6 oleate) , Sunsoft A-17E (Polyglyceryl-5 Oleate) , Sunsoft A-18E (Polyglyceryl-5 Stearate) , Sunsoft Q-10Y (Polyglyceryl-10 Caprate) , Sunsoft Q-12Y (Polyglyceryl-10 Laurate) , Sunsoft Q-14S (Polyglyceryl-10 Myristate) , Sunsoft Q-18Y (Polyglyceryl-10 stearate) , by the company Nikkol under the trade name Nikkol Decaglyn 1-OV (Polyglyceryl-10 Oleate) , by the company Lonza under the trade name Polyaldo HGDS KFG (6-2-S) (polyglyceryl-6 distearate) .
[0048] In some particularly preferred embodiments, Polyglyceryl-5 laurate is used in the composition of the present invention.
[0049] If presents, the fatty acid ester of polyglycerol is present in the composition according to the present invention in an amount ranging from 0.05 wt. %to 2.0 wt.%, preferably from 0.1 wt. %to 1.0 wt. %, more preferably from 0.2 wt. %to 0.8 wt.%, relative to the total weight of the composition.
[0050] Polyoxyalkylenated polyol fatty acid esters
[0051] As used herein, apolyoxyalkylenated polyol fatty acid ester is an ester of a polyol and at least one fatty acid wherein the ester has at least one polyoxyalkylene moiety.
[0052] The polyoxyalkylene moiety may comprise oxyethylene units, oxypropylene units, oxybutylene units and mixtures thereof.
[0053] It is preferable that the polyoxyalkylene moiety comprise oxyethylene units, more preferably 5 or more oxyethylene groups, and even more preferably 7 or more oxyethylene groups. It is also preferable that the polyoxyalkylene moiety comprise no oxypropylene or oxybutylene unit. Thus, the polyoxyalkylenated polyol fatty acid ester may preferably be polyoxyethylenated polyol fatty acid ester.
[0054] The term “polyol” here means an alcohol having two or more hydroxy groups, and does not encompass a saccharide or a derivative thereof. The derivative of a saccharide includes a sugar alcohol which is obtained by reducing one or more carbonyl groups of a saccharide, as well as a saccharide or a sugar alcohol in which the hydrogen atom or atoms in one or more hydroxy groups thereof has or have been replaced with at least one substituent such as an alkyl group, ahydroxyalkyl group, an alkoxy group, an acyl group or a carbonyl group.
[0055] Preferably, the polyol is a C2-C12 polyol, more preferably a C2-C9 polyol, comprising at least 2 hydroxy groups, and preferably 2 to 6 hydroxy groups.
[0056] The polyol may be a natural or synthetic polyol. The polyol may have a linear, branched or cyclic molecular structure.
[0057] The polyol may be selected from glycerin and derivatives thereof, and glycols and derivatives thereof. The polyol may be selected from the group consisting of glycerin, diglycerin, polyglycerin, ethyleneglycol, diethyleneglycol, propyleneglycol, dipropyleneglycol, butyleneglycol, pentyleneglycol, hexyleneglycol, 1,3-propanediol, and 1, 5-pentanediol.
[0058] It is preferable that the polyol is glycerin.
[0059] The fatty acid may be selected from linear or branched, saturated or unsaturated fatty acids.
[0060] Preferably, the fatty acid is selected from saturated C8-C28 fatty acids, preferably C8-C22 fatty acids, and more preferably C10-C22 fatty acids. As examples of the saturated C8-C28 fatty acids, mention may be made of caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, arachidic acid, behenic acid, as well as structural isomers thereof.
[0061] Examples of the polyoxyalkylenated polyol fatty acid ester include, but are not limited to oxyethylenated fatty acid esters of polyols comprising at least 5 oxyethylene groups, which may comprise up to 40 oxyethylene groups, in particular oxyethylenated esters of a fatty acid comprising from 8 to 28 carbon atoms, preferably from 8 to 22 carbon atoms and better still from 10 to 22 carbon atoms and of glycerol, for instance PEG-20 glyceryl triisostearate, PEG-7 glyceryl cocoate.
[0062] Preferably, the polyoxyalkylenated polyol fatty acid ester is selected from POE (polyoxyethylenated) glyceryl fatty acid esters, preferably from the group consisting of PEG-7 glyceryl cocoate, PEG-8 glyceryl isostearate, PEG-20 glyceryl tri-isostearate, PEG-20 glyceryl stearate, PEG-20 glyceryl isostearate, and mixtures thereof.
[0063] In some particular preferred embodiments, PEG-7 glyceryl cocoate is used in the composition of the present invention.
[0064] If presents, the polyoxyalkylenated polyol fatty acid ester is present in the composition according to the present invention in an amount ranging from 0.05 wt.%to 2.0 wt. %, preferably from 0.1 wt. %to 1.0 wt. %, more preferably from 0.2 wt.%to 0.8 wt. %, relative to the total weight of the composition.
[0065] Alkoxylated fatty alcohols
[0066] Alkoxylated fatty alcohols, which are ethers formed from the reaction of a fatty alcohol with an alkylene oxide, generally ethylene oxide and / or propylene oxide, e.g., ethoxylated fatty alcohols which are adducts of fatty alcohols and polyethylene oxide.
[0067] Preferably, the alkoxylated fatty alcohol is selected from ethoxylated / propoxylated fatty alcohols, for example, ethoxylated / propoxylated C3-C28 fatty alcohols, preferably ethoxylated / propoxylated C4-C22 fatty alcohols, more preferably ethoxylated / propoxylated C4-C22 fatty alcohols with 1-50 ethylene oxide units and 1-50 propylene oxide units.
[0068] Specific examples of ethoxylated / propoxylated fatty alcohols that may be suitable for use in the present invention include PPG-1 Beheneth-15, PPG-12 Capryleth-18, PPG-2-Ceteareth-9, PPG-4-Ceteareth-12, PPG-10-Ceteareth-20, PPG-1-Ceteth-1, PPG-1-Ceteth-5, PPG-1-Ceteth-10, PPG-1-Ceteth-20, PPG-2-Ceteth-1, PPG-2-Ceteth-5, PPG-2-Ceteth-10, PPG-2-Ceteth-20, PPG-4-Ceteth-1, PPG-4-Ceteth-5, PPG-4-Ceteth-10, PPG-4-Ceteth-20, PPG-5-Ceteth-20, PPG-8-Ceteth-1, PPG-8-Ceteth-2, PPG-8-Ceteth-5, PPG-8-Ceteth-10, PPG-8-Ceteth-20, PPG-2 C12-13 Pareth-8, PPG-2 C12-15 Pareth-6, PPG-4 C13-15 Pareth-15, PPG-5 C9-15 Pareth-6, PPG-6 C9-11 Pareth-5, PPG-6 C12-15 Pareth-12, PPG-6 C12-18 Pareth-11, PPG-3 C12-14 Sec-Pareth-7, PPG-4 C12-14 Sec-Pareth-5, PPG-5 C12-14 Sec-Pareth-7, PPG-5 C12-14 Sec-Pareth-9, PPG-1-Deceth-6, PPG-2-Deceth-3, PPG-2-Deceth-5, PPG-2-Deceth-7, PPG-2-Deceth-10, PPG-2-Deceth-12, PPG-2-Deceth-15, PPG-2-Deceth-20, PPG-2-Deceth-30, PPG-2-Deceth-40, PPG-2-Deceth-50, PPG-2-Deceth-60, PPG-4-Deceth-4, PPG-4-Deceth-6, PPG-6-Deceth-4, PPG-6-Deceth-9, PPG-8-Deceth-6, PPG-14-Deceth-6, PPG-6-Decyltetradeceth-12, PPG-6-Decyltetradeceth-20, PPG-6-Decyltetradeceth-30, PPG-13-Decyltetradeceth-24, PPG-20-Decyltetradeceth-10, PPG-26-Buteth-26, PPG-2-Isodeceth-4, PPG-2-Isodeceth-6, PPG-2-Isodeceth-8, PPG-2-Isodeceth-9, PPG-2-Isodeceth-10, PPG-2-Isodeceth-12, PPG-2-Isodeceth-18, PPG-2-Isodeceth-25, PPG-4-Isodeceth-10, PPG-12-Laneth-50, PPG-2-Laureth-5, PPG-2-Laureth-8, PPG-2-Laureth-12, PPG-3-Laureth-8, PPG-3-Laureth-9, PPG-3-Laureth-10, PPG-3-Laureth-12, PPG-4 Laureth-2, PPG-4 Laureth-5, PPG-4 Laureth-7, PPG-4-Laureth-15, PPG-5-Laureth-5, PPG-6-Laureth-3, PPG-25-Laureth-25, PPG-7 Lauryl Ether, PPG-3-Myreth-3, PPG-3-Myreth-11, PPG-20-PEG-20 Hydrogenated Lanolin, PPG-2-PEG-11 Hydrogenated Lauryl Alcohol Ether, PPG-12-PEG-50 Lanolin, PPG-12-PEG-65 Lanolin Oil, PPG-40-PEG-60 Lanolin Oil, PPG-1-PEG-9 Lauryl Glycol Ether, PPG-3-PEG-6 Oleyl Ether, PPG-23-Steareth-34, PPG-30 Steareth-4, PPG-34-Steareth-3, PPG-38 Steareth-6, PPG-1 Trideceth-6, PPG-4 Trideceth-6, and PPG-6 Trideceth-8.
[0069] In some particular preferred embodiments, PPG-5-Ceteth-20 is used in the composition of the present invention.
[0070] If presents, the alkoxylated fatty alcohol is present in the composition according to the present invention in an amount ranging from 0.05 wt. %to 2.0 wt.%, preferably from 0.1 wt. %to 1.0 wt. %, more preferably from 0.2 wt. %to 0.8 wt.%, relative to the total weight of the composition.
[0071] Preferably, the nonionic surfactant is selected from C8-C28 fatty acid esters of polyglycerol with polyglyceryl moiety derived from 2 to 20 glycerol units, polyoxyalkylenated C2-C9 polyol C8-C28 fatty acid esters, alkoxylated C3-28 fatty alcohols, and a combination thereof; preferably selected from C10-C22 fatty acid esters of polyglycerol with polyglyceryl moiety derived from 4 to 10 glycerol units, polyoxyethylenated glyceryl C10-C22 fatty acid esters, ethoxylated / propoxylated C4-C22 alcohols with 1-50 ethylene oxide units and 1-50 propylene oxide units, and a combination thereof, more preferably selected from polyglyceryl-5 laurate, polyglyceryl-6 oleate, polyglyceryl-6 distearate, PEG-7 glyceryl cocoate, PEG-8 glyceryl isostearate, PEG-20 glyceryl tri-isostearate, PEG-20 glyceryl stearate, PEG-20 glyceryl isostearate, PEG-5-ceteth-20, PPG-4-Ceteth-20, PPG-26-BUTETH-26, and a combination thereof.
[0072] In some preferred embodiments, the composition according to the present invention comprises a nonionic surfactant selected from polyoxyalkylenated C2-C9 polyol C8-C28 fatty acid esters, alkoxylated C8-28 fatty alcohols, and a combination thereof; more preferably selected from PEG-7 glyceryl cocoate, PEG-8 glyceryl isostearate, PEG-20 glyceryl tri-isostearate, PEG-20 glyceryl stearate, PEG-20 glyceryl isostearate, PEG-5-ceteth-20, PPG-4-Ceteth-20, acombination thereof.
[0073] In some particular preferred embodiments, the composition according to the present invention comprises PPG-5-ceteth-20 and PEG-7 glyceryl cocoate.
[0074] Advantageously, the nonionic surfactant is present in the composition according to the present invention in an amount ranging from 0.3 wt. %to 4 wt. %, preferably from 0.4 wt. %to 2 wt. %, more preferably from 0.5 wt. %to 1.5 wt. %, relative to the total weight of the composition.
[0075] Polyhydroxy acids
[0076] According to the first aspect, the composition according to the present invention comprises at least one polyhydroxy acid.
[0077] The term “polyhydroxy acid” here means an organic compound which has at least one carboxyl group and a plurality of hydroxy groups. The number of carboxyl groups in the polyhydroxy acid is not limited, but one or two carboxyl groups are preferable, and one carboxyl group is more preferable. The number of hydroxyl groups in the polyhydroxy acid is also not limited, but 2 to 10 are preferable, and 2 to 6 are more preferable. The number of carbon atoms in the polyhydroxy acid is not limited, but 3 to 11 are preferable, and 3 to 8 are more preferable.
[0078] The above organic compound may be aliphatic or aromatic. In other words, the polyhydroxy acid may be selected from aliphatic polyhydroxy acids and aromatic polyhydroxy acids. It is preferable that the aliphatic polyhydroxy acid be selected from sugar acids.
[0079] Examples of the polyhydroxy acid include, dihydroxy propanoic acid such as glyceric acid; trihydroxy butanoic acid such as erythronic acid and threonic acid; tetrahydroxy pentanoic acid such as ribonic acid, arabinoic acid, xylonic acid, and lyxonic acid; pentahydroxy hexanoic acid such as allonic acid, altronic acid, gluconic acid, mannoic acid, gulonic acid, idonic acid, galactonic acid, and talonic acid; hexahydroxy heptanoic acid such as glucoheptanoic acid, galactoheptonic acid; tartaric acid; lactobionic acid, maltobionic acid, and mixtures thereof.
[0080] It is preferable that the polyhydroxy acid be in the form of a lactone. The lactone ring of the polyhydroxy acid in the form of a lactone may be saturated. Examples of the polyhydroxy acid include, gluconolactone, ribonolactone, and mixtures thereof.
[0081] Preferably, the polyhydroxy acid is selected from lactones with 2-6 hydroxyl groups.
[0082] Advantageously, the polyhydroxy acid is selected from lactones with 2-6 hydroxyl groups and 3-8 carbon atoms.
[0083] It is more preferable that the polyhydroxy acid be gluconolactone, which has the following structure.
[0084] Advantageously, the polyhydroxy acid is present in the composition according to the present invention in an amount ranging from 0.5 wt. %to 20 wt. %, preferably from 1.0 wt. %to 10 wt. %, preferably from 1.5 wt. %to 5 wt. %, relative to the total weight of the composition.
[0085] Alkanolamines
[0086] According to the first aspect, the composition according to the present invention comprises at least one alkanolamine.
[0087] The term "alkanolamine" means an organic amine comprising a primary, secondary or tertiary amine function, and one or more linear or branched C1-C8 alkyl groups bearing one or more hydroxyl radicals.
[0088] For the purpose of the present invention, the alkanolamine is used as a pH adjuster to adjust the pH value of the composition; preferably adjust the pH value to 3.5-9.0.
[0089] Preferably, the alkanolamine is selected from alkanolamines such as mono-, di-or trialkanolamines, comprising one to three identical or different C1-C4 hydroxyalkyl radicals, and a combination thereof.
[0090] Among the compounds of the alkanolamine type that may be mentioned include but not limited to: monoethanolamine (also known as MEA) , diethanolamine, triethanolamine, monoisopropanolamine, aminomethyl propoanol, diisopropanolamine, triisopropanolamine, N-dimethylaminoethanolamine, 2-amino-2-methyl-1-propanol, triisopropanolamine, 2-amino-2-methyl-1, 3-propanediol, 3-amino-1, 2-propanediol, 3-dimethylamino-1, 2-propanediol, 2-amino-2-methyl-1-propanol (aminomethyl propanol or AMP) , tris (hydroxymethylamino) methane, tetrahydroxypropyl ethylenediamine, tromethamine, amixture thereof, preferably triethanolamine and / or aminomethyl propanol and a mixture thereof.
[0091] Other examples include but are not limited to: 1, 3-diaminopropane, 1, 3-diamino-2-propanol, spermine, and spermidine.
[0092] More preferably, the alkanolamine is selected from monoethanolamine, diethanolamine, triethanolamine, aminomethyl propanol, tromethamine, monoisopropanolamine, diisopropanolamine, triisopropanolamine, and a combination thereof, and even more preferably selected from triethanolamine, tromethamine, aminomethyl propanol, and a combination thereof.
[0093] Aqueous phase
[0094] The composition of the present invention may comprise an aqueous phase.
[0095] Said aqueous phase comprises water.
[0096] Advantageously, water is present in the composition of the present invention in an amount ranging from 60 wt. %to 95 wt. %, preferably from 80 wt. %to 93 wt. %, relative to the total weight of the composition.
[0097] Optionally, the aqueous phase comprises an organic solvent miscible with water (at room temperature 25℃) selected from ethanol, glycols and polyols having from 2 to 20 carbon atoms, preferably from 2 to 10 carbon atoms, and preferentially having from 2 to 8 carbon atoms, such as glycerin, propylene glycol, butylene glycol, pentylene glycol, hexylene glycol, caprylyl glycol, dipropylene glycol, diethylene glycol; and mixtures thereof, so as to provide a hydration effect.
[0098] If presents, the organic solvent miscible with water is present in the composition of the present invention in an amount ranging from 0.5 wt. %to 10 wt.%, preferably from 1 wt. %to 5 wt. %, relative to the total weight of the composition.
[0099] Additional cosmetic activeingredients
[0100] The composition of the present invention may comprise an additional cosmetic active ingredient.
[0101] As examples of cosmetic active ingredient, mention can be made of moisturizing agents; vitamins and derivatives thereof; tightening agents; agents acting on the microcirculation, additional peeling agents, and mixtures thereof.
[0102] It is easy for the skilled in the art to adjust the nature and amount of the additional cosmetic active ingredient based on the final use of the composition according to the present invention such that the advantageous properties of the composition used according to the present invention are not, or are not substantially, adversely affected by the envisaged addition.
[0103] Additional adjuvantsor additives
[0104] The composition of the present invention may also contain conventional cosmetic adjuvants or additives, for instance, other surfactants, preservatives, fragrances, and mixtures thereof.
[0105] The skilled in the art can select the nature and amount of the additional adjuvants or additive so as not to adversely impact the final use of the composition according to the present invention.
[0106] According to a particularly preferred embodiment, the present invention provides a leave-on composition comprising in an aqueous phase, relative to the total weight of the composition:
[0107] (i) from 0.5 wt. %to 1.5 wt. %of at least one nonionic surfactant selected from PEG-7 glyceryl cocoate, PEG-8 glyceryl isostearate, PEG-20 glyceryl tri-isostearate, PEG-20 glyceryl stearate, PEG-20 glyceryl isostearate, PEG-5-ceteth-20, PPG-4-Ceteth-20, and a combination thereof;
[0108] (ii) from 1.5 wt. %to 5 wt. %of gluconolactone; and
[0109] (iii) at least one alkanolamine selected from aminomethyl propanol, triethanolamine, tromethamine, acombination thereof,
[0110] wherein the composition has a pH value of 3.5-9.0.
[0111] Galenic form and method
[0112] In some embodiments, the composition of the present invention can be in the form of a homogeneous hydrous system.
[0113] The composition of the present invention can be used for caring for keratin materials, especially the skin.
[0114] According to the second aspect, the present invention provides a non-therapeutic method for caring for the skin, comprising applying the composition according to the first aspect of the present invention to keratin materials, especially the skin.
[0115] EXAMPLES
[0116] The following examples serve to illustrate the present invention without, however, being limiting in nature.
[0117] Main raw materials used, trade names and supplier thereof are listed in Table 1.
[0118] Table 1
[0119] Invention Examples1-3and comparativeexamples1-2
[0120] Compositions of invention examples (IE) 1-3 and comparative examples (CE) 1-2 were prepared based on the amounts given in Table 2. The amounts are given in%by weight of active ingredient relative to the total weight of the composition.
[0121] Table 2
[0122] Compositions of invention examples 1-3 are compositions according to the present invention.
[0123] Composition of comparative example 1 comprises sodium hydroxide rather than an alkanolamine.
[0124] Composition of comparative example 2 comprises potassium hydroxide rather than an alkanolamine.
[0125] Preparation process:
[0126] The compositions listed above were prepared as follows, taking the composition of invention example 1 as an example:
[0127] 1)mixing PPG-5-ceteth-20, PEG-7 glyceryl cocoate, gluconolactone, salicylic acid and pentylene glycol in water, and
[0128] 2)neutralizing with aminomethyl propanol until pH equals to 4.5 and stirring well until a uniform composition.
[0129] Evaluation
[0130] Crystallization and stickiness of compositions obtained above were evaluated.
[0131] The crystallization of a composition to be tested was evaluated as follows:
[0132] The composition was contained in a cosmetic bottle, the cap of the cosmetic bottle was taken off and the bottle was turned over like in-use experience.
[0133] Then the cap put back until 7-14 days later to reopen it and check bottleneck status whether there are hard crystallization particles.
[0134] The crystallization of compositions of invention examples (IE) 1-3 and comparative examples (CE) 1-2 were summarized in Table 3.
[0135] Table 3
[0136] Stickiness:
[0137] The stickiness of a composition to be tested was evaluated by using a texture analyzer (Model: TA. XT Plus) to test the force between each artificial skin as follows
[0138] 1) 10μL of a sample was applied on a black artificial skin, and allowed the skin to stick on the bottom of a plate;
[0139] 2) another black artificial skin with the same size was allowed to stick on a probe;
[0140] 3) the skins were dried at room temperature for 2 minutes;
[0141] 4) the progress was started and the probe was allowed to decline until touch the artificial skin on the bottom of the plate with 3 kg force;
[0142] 5) the analyzer will read the peel force (g) when the skins depart from each other, which can be linked with stickiness of the sample.
[0143] Fig. 1 shows the stickiness of compositions of invention example 1 and comparative example 1 as determined by a texture analyzer. More negative force data means more sticky of the composition tested.
[0144] It can be seen from Fig. 1 that composition of invention example 1 is less sticky than composition of comparative example 1.
[0145] It can be concluded that the composition of the present invention is no crystallization and not too sticky.
Claims
1.A leave-on composition, preferably for caring for keratin materials comprising:(i) at least one nonionic surfactant selected from fatty acid esters of polyglycerol, polyoxyalkylenated polyol fatty acid esters, alkoxylated fatty alcohols, and a combination thereof;(ii) at least one polyhydroxy acid; and(iii) at least one alkanolamine.2.Composition according to claim 1, wherein the nonionic surfactant is selected from C8-C28 fatty acid esters of polyglycerol with polyglyceryl moiety derived from 2 to 20 glycerol units, polyoxyalkylenated C2-C9 polyol C8-C28 fatty acid esters, alkoxylated C3-28 fatty alcohols, and a combination thereof; preferably selected from C10-C22 fatty acid esters of polyglycerol with polyglyceryl moiety derived from 4 to 10 glycerol units, polyoxyethylenated glyceryl C10-C22 fatty acid esters, ethoxylated / propoxylated C4-C22 fatty alcohols with 1-50 ethylene oxide units and 1-50 propylene oxide units, and a combination thereof; more preferably selected from polyglyceryl-5 laurate, polyglyceryl-6 oleate, polyglyceryl-6 distearate, PEG-7 glyceryl cocoate, PEG-8 glyceryl isostearate, PEG-20 glyceryl tri-isostearate, PEG-20 glyceryl stearate, PEG-20 glyceryl isostearate, PEG-5-ceteth-20, PPG-4-Ceteth-20, PPG-26-BUTETH-26, and a combination thereof.3.Composition according to claim 1, wherein the nonionic surfactant is selected from polyoxyalkylenated C2-C9 polyol C8-C28 fatty acid esters, alkoxylated C3-28 fatty alcohols, and a combination thereof; more preferably selected from PEG-7 glyceryl cocoate, PEG-8 glyceryl isostearate, PEG-20 glyceryl tri-isostearate, PEG-20 glyceryl stearate, PEG-20 glyceryl isostearate, PEG-5-ceteth-20, PPG-4-Ceteth-20; more preferably selected from PPG-5-ceteth-20 and PEG-7 glyceryl cocoate.4.Composition of any of claims 1 to 3, wherein the nonionic surfactant is present in an amount ranging from 0.3 wt. %to 4 wt. %, preferably from 0.4 wt. %to 2 wt. %, more preferably from 0.5 wt. %to 1.5 wt. %, relative to the total weight of the composition.5.Composition of any of claims 1 to 4, wherein the polyhydroxy acid is selected from aliphatic polyhydroxy acids and aromatic polyhydroxy acids, preferably selected from lactones with 2-6 hydroxyl groups and 3-8 carbon atoms.5.Composition of any of claims 1 to 4, wherein the polyhydroxy acid is gluconolactone.6.Composition of any of claims 1 to 5, wherein the polyhydroxy acid is present in an amount ranging from 0.5 wt. %to 20 wt. %, preferably from 1.0 wt. %to 10 wt. %, preferably from 1.5 wt. %to 5 wt. %, relative to the total weight of the composition.7.Composition according to any of claims 1 to 6, wherein the alkanolamine is selected from mono-, di-and trialkanolamines, comprising one to three identical or different C1-C4 hydroxyalkyl radicals, and a combination thereof, preferably selected from monoethanolamine, diethanolamine, triethanolamine, aminomethyl propanol, tromethamine, monoisopropanolamine, diisopropanolamine, triisopropanolamine, and a combination thereof; more preferably selected from triethanolamine, tromethamine, aminomethyl propanol, and a combination thereof.8.Composition according to any of claims 1 to 7, wherein the pH value of the composition is from 3.5 to 9.0.9.Composition according to any of claims 1 to 8, wherein the composition comprises water in an amount ranging from 60 wt. %to 95 wt. %, preferably from 80 wt. %to 93 wt. %, relative to the total weight of the composition.10.Composition according to any of claims 1 to 9, wherein the composition comprises an organic solvent miscible with water in an amount ranging from 0.5 wt. %to 10 wt. %, preferably from 1 wt. %to 5 wt. %, relative to the total weight of the composition.11.Composition according to claim 1, comprising in an aqueous phase, relative to the total weight of the composition:(i) from 0.5 wt. %to 1.5 wt. %of at least one nonionic surfactant selected from PEG-7 glyceryl cocoate, PEG-8 glyceryl isostearate, PEG-20 glyceryl tri-isostearate, PEG-20 glyceryl stearate, PEG-20 glyceryl isostearate, PEG-5-ceteth-20, PPG-4-Ceteth-20, and a combination thereof;(ii) from 1.5 wt. %to 5 wt. %of gluconolactone; and(iii) at least one alkanolamine selected from aminomethyl propanol, triethanolamine, tromethamine, and a combination thereof,wherein the composition has a pH value of 3.5-9.0.12.Composition according to any of claims 1 to 11, wherein the composition is in the form of a homogeneous hydrous system.13.A non-therapeutic method for caring for keratin materials, comprising applying the composition according to any of claims 1 to 12 to the keratin materials.
Citation Information
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