Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
  • A61K8/04—Dispersions; Emulsions
  • A61K8/06—Emulsions
  • A61K8/062—Oil-in-water emulsions
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
  • A61K8/04—Dispersions; Emulsions
  • A61K8/06—Emulsions
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
  • A61K8/36—Carboxylic acids; Salts or anhydrides thereof
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/40—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing nitrogen
  • A61K8/41—Amines
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/40—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing nitrogen
  • A61K8/42—Amides
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/63—Steroids; Derivatives thereof
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/68—Sphingolipids, e.g. ceramides, cerebrosides, gangliosides
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/92—Oils, fats or waxes; Derivatives thereof, e.g. hydrogenation products thereof
  • A61K8/922—Oils, fats or waxes; Derivatives thereof, e.g. hydrogenation products thereof of vegetable origin
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q19/00—Preparations for care of the skin

Definitions

• the present invention relates to an oil-in-water emulsified cosmetic composition containing a ceramide-containing oil component.
• the stratum corneum the outermost layer of skin, prevents ingress of harmful substances into the skin and moisture loss from the skin and at the same time, has a function of keeping flexibility or smooth appearance of the skin by retaining water in itself.
• Lipids called horny intercellular lipids (which will hereinafter be called “horny ICL”) exist so as to fill the interstices between numerous corneocytes.
• horny ICL In this horny ICL, almost 50% of the lipids are ceramides, and there are also cholesterol, cholesterol esters, fatty acids and the like. It is generally known that a decrease of horny ICL, especially of ceramides, triggers detrimental conditions in the skin, such as rough skin, dry skin or aged skin.
• the stratum corneum having a deteriorated function can be improved by the external use of ceramide as a component for improving the function of the stratum corneum.
• ceramide When a ceramide is used in combination with another oil component, more than one surfactant is required depending on the differences of emulsifying activities thereof and in addition, the amount of the surfactants to be added tends to increase.
• An oil-in-water emulsified cosmetic composition on the other hand, has water as a continuous phase, so that it provides a light feeling and in addition, is refreshing to the eyes and to the touch.
• a mixture of a ceramide with the other oil component is emulsified, such an oil-in-water emulsified cosmetic composition tends to worsen the feeling upon use and the emulsion itself becomes less stable.
• an oil-in-water emulsified cosmetic composition containing an emulsion containing (A) a sphingosine represented by the following formula (1): (wherein, R 1 represents a linear, branched or cyclic, saturated or unsaturated C 4-30 hydrocarbon group which may be substituted by a hydroxyl, carbonyl or amino group; Y represents a methylene group, a methine group or an oxygen atom; X 1 , X 2 and X 3 each independently represent a hydrogen atom, a hydroxyl group or an acetoxy group, X 4 represents a hydrogen atom, an acetyl group or a glyceryl group or forms an oxo group together with the adjacent oxygen atom (with the proviso that when Y represents a methine group, either X 1 or X 2 represents a hydrogen atom and the other one does not exist and when X 4 forms an oxo group, X 3 does not exist); R
• a preparation process of the above-described oil-in-water emulsified cosmetic composition which includes the steps of mixing an emulsion obtained by emulsifying (C) a ceramide represented by formula (2) with (A) a sphingosine represented by formula (1) and (B) an acid compound selected from inorganic acids and organic acids having 5 or less carbon atoms, and another emulsion obtained by emulsifying (D) an oil component selected from polar oils and hydrocarbon oils with (E) a surfactant.
• the present invention relates to an oil-in-water emulsified cosmetic composition containing a ceramide-containing oil component and having excellent emulsion stability.
• oil components including a ceramide represented by formula (2)
• a ceramide represented by formula (2) Upon emulsification of oil components including a ceramide represented by formula (2), preferably mixing them after emulsification of the ceramide and the other oil components separately makes it possible to prepare an oil-in-water emulsified cosmetic composition having an excellent emulsion stability without impairing the emulsified state of the ceramide.
• a ceramide is a substance that is easy to crystallize but hard to emulsify, and therefore, the kinds of surfactant that can be used as an emulsifier are limited.
• a ceramide is emulsified as a mixture with the other oil component for cosmetics, this mixture leads to a dissolved state depending on the type of the oil component or surfactant used. It therefore becomes difficult to keep the stability of the emulsion system. To maintain the emulsified state of the ceramide, the amount of a surfactant inevitably increases.
• the emulsified state of the ceramide is presumed to be stable, because they form a liquid crystal structure and crystallization of the ceramide is suppressed.
• the emulsion of the ceramide obtained by emulsification with a sphingosine becomes stable, the emulsion system tends to strengthen against any damage even when mixed with an oil component or another component which may inhibit emulsion stability of the ceramide. Therefore, it is possible not only to attain a stable emulsion but also to simplify the emulsifying process by which a ceramide and another oil component are individually emulsified and then mixed with each other.
• a salt of a sphingosine as an emulsifier of a ceramide contributes to a reduction in the amount of surfactant to be used for the whole cosmetic composition, whereby the composition has an excellent feeling upon use.
• the sphingosine usable as Component (A) in the present invention is represented by the above-described formula (1).
• R 1 represents a linear, branched or cyclic, saturated or unsaturated C 4-30 hydrocarbon group which may be substituted by a hydroxyl, carbonyl or amino group, preferably a linear, branched or cyclic, saturated or unsaturated C 7-22 hydrocarbon group which may be substituted by a hydroxyl group. More preferably, R 1 is a linear or branched C 10-20 alkyl group or a linear or branched C 10-20 alkyl group having, at a terminal thereof on the Y side, a hydroxyl group. When it is a branched alkyl group, it preferably has a methyl branched alkyl chain.
• More preferred examples include tridecyl, tetradecyl, pentadecyl, hexadecyl, 1-hydroxytridecyl, 1-hydroxypentadecyl, isohexadecyl and isostearyl groups.
• Y represents any one of a methylene group (CH 2 ), a methine group (CH) and an oxygen atom.
• X 1 , X 2 and X 3 each independently represent a hydrogen atom, a hydroxyl group or an acetoxy group
• X 4 represents a hydrogen atom, an acetyl group, a glyceryl group or a substituent forming an oxo group together with the adjacent oxygen atom.
• X 1 , X 2 and X 3 represents a hydroxyl group
• the remaining ones represent a hydrogen atom
• X 4 represents a hydrogen atom.
• Y represents a methine group
• either X 1 or X 2 represents a hydrogen atom and the other one does not exist.
• X 4 forms an oxo group
• X 3 does not exist.
• R 2 and R 3 each independently represent a hydrogen atom, a hydroxyl group, a hydroxymethyl group or an acetoxymethyl group.
• R 3 is preferably a hydrogen atom.
• R means R 4 or R 5 and when a stands for 3, R means R 4 , R 5 or R 6 .
• R 4 , R 5 and R 6 each independently represent a hydrogen atom or an amidino group, or a linear or branched, saturated or unsaturated hydrocarbon group having 1 to 8 carbon atoms in total and optionally having a substituent selected from hydroxyl, hydroxyalkoxy, alkoxy and acetoxy groups.
• hydroxyalkoxy group which may be a substituent for the hydrocarbon group
• linear or branched C 1-7 hydroxyalkoxy groups are preferred.
• alkoxy group linear or branched C 1-7 alkoxy groups are preferred.
• R 4 , R 5 or R 6 include a hydrogen atom; linear or branched alkyl groups such as methyl, ethyl, propyl, 2-ethylhexyl and isopropyl; alkenyl groups such as vinyl and allyl; amidino groups; and hydrocarbon groups having 1 to 8 carbon atoms in total and having 1 to 6 substituents selected from hydroxyl group, hydroxyalkoxy group and alkoxy groups, such as hydroxymethyl, 2-hydroxyethyl, 1,1-dimethyl-2-hydroxyethyl, 2-hydroxypropyl, 2,3-dihydroxypropyl, 2-hydroxy-3-methoxypropyl, 2,3,4,5,6-pentahydroxyhexyl, 1,1-bis(hydroxymethyl)ethyl, 2-(2-hydroxyethoxy)ethyl, 2-methoxyethyl, 1-methyl-2-hydroxyethyl, 3-hydroxypropyl, 3-methoxypropyl, and 1,1-bis(hydroxymethyl)-2
• a hydrogen atom, a methyl group, and an alkyl group which may be substituted by 1 to 3 substituents selected from hydroxyl group and hydroxyalkoxy groups such as 2-hydroxyethyl, 1,1-dimethyl-2-hydroxyethyl, 1,1-bis(hydroxymethyl)ethyl, 2-(2-hydroxyethoxy)ethyl are more preferred.
• sphingosine represented by formula (1) a natural or natural type sphingosine, or derivative thereof represented by the below-described formula (3) (which will hereinafter be described as “natural type sphingosine”, collectively), or a pseudo type sphingosine having a sphingosine structure represented by formula (4) (which will hereinafter be described as “pseudo type sphingosine”) is preferred.
• R 12 linear, branched or cyclic, saturated or unsaturated C 7-19 hydrocarbon groups are preferred, with linear, saturated or unsaturated C 13-15 hydrocarbon groups being more preferred. It is preferred that a stands for 2 and R 1 s each independently represent a hydrogen atom or a linear or branched C 1-4 alkyl group.
• natural type sphingosine represented by formula (3) include natural sphingosine, dihydrosphingosine, phytosphingosine, sphingadienine, dehydrosphingosine, and dehydrophytosphingosine and N-alkyl derivatives (e.g., N-methyl derivatives) thereof.
• natural (D(+) form) optically active derivatives unnatural (L( ⁇ ) form) optically active derivatives or a mixture thereof may be used.
• the relative configuration of these compounds may be any one of the configuration of a natural form, that of an unnatural form and that of their mixture.
• PHYTOSPHINGOSINE listed in INCI; 8th Edition
• those represented by the below-described formulas are preferred. (wherein, m stands for 5 to 17 and I stands for 1 to 13).
• They may be an extract from natural sphingosine or a synthesized product thereof. A commercially available one can also be used.
• Examples of the commercially available natural type sphingosine include D-Sphingosine (4-Sphingenine) (product of SIGMA-ALDRICH), DS-phytosphingosine (product of DOOSAN) and phytosphingosine (product of Cosmo Ferm).
• D-Sphingosine (4-Sphingenine) (product of SIGMA-ALDRICH), DS-phytosphingosine (product of DOOSAN) and phytosphingosine (product of Cosmo Ferm).
• R 17 represents a linear, branched or cyclic, saturated or unsaturated C 10-22 hydrocarbon group which may be substituted by a hydroxyl group
• X 4 represents a hydrogen atom, an acetyl group or a glyceryl group
• R 2 each independently represents a hydrogen atom or an amidino group, or a linear or branched, saturated or unsaturated hydrocarbon group having 1 to 8 carbon atoms in total and optionally having a substituent selected from hydroxyl, hydroxyalkoxy, alkoxy and acetoxy groups, and a stands for 2 or 3).
• iso-branched alkyl groups having 14 to 20 carbon atoms are preferred, with an isostearyl group being more preferred. Still more preferred is an isostearyl group available by using as a raw material oil an isostearyl alcohol derived from a by-product of dimer acid preparation using a fatty acid derived from an animal or plant oil.
• R 2 means R 18 or R 19
• R 2 means R 18 , R 19 or R 20 .
• R 18 , R 19 or R 20 include a hydrogen atom; linear or branched alkyl groups such as methyl, ethyl, propyl, 2-ethylhexyl and isopropyl; alkenyl groups such as vinyl and allyl; an amidino group; and alkyl groups having 1 to 8 carbon atoms in total and having a substituent selected from hydroxyl, hydroxyalkoxy and alkoxy groups, such as hydroxymethyl, 2-hydroxyethyl, 1,1-dimethyl-2-hydroxyethyl, 2-hydroxypropyl, 2,3-dihydroxypropyl, 2-hydroxy-3-methoxypropyl, 2,3,4,5,6-pentahydroxyhexyl, 1,1-bis(hydroxymethyl)ethyl, 2-(2-hydroxyethoxy)ethyl, 2-methoxyethyl, 1-methyl-2-hydroxyethyl, 3-hydroxypropyl, 3-methoxypropyl, and 1,1-bis(hydroxymethyl)-2-hydroxy
• a secondary amine having as either R 18 or R 19 a hydrogen atom and as the other one a 2-hydroxyethyl, 1,1-dimethyl-2-hydroxyethyl, 1,1-bis(hydroxymethyl)ethyl or 2 -(2-hydroxyethoxy)ethyl group is still more preferred.
• R 17 an isostearyl group, as X 4 a hydrogen atom, as R 18 a hydrogen atom, and as R 19 an alkyl group having 1 to 3 substituents selected from hydroxyl and hydroxyalkoxy groups, such as 2-hydroxyethyl, 1,1-bis(hydroxymethyl)ethyl, 1,1-dimethyl-2-hydroxyethyl or 2-(2-hydroxyethoxy)ethyl group is preferred.
• pseudo type sphingosines (i) to (iv) are specific examples of the pseudo type sphingosine.
• Component (A) two or more compounds may be used in combination.
• the content of Component (A) in the cosmetic composition of the present invention is preferably from 0.001 to 10 weight %, more preferably from 0.005 to 3 weight %, still more preferably from 0.01 to 1.5 weight %.
• the acid compound (B) of the present invention selected from inorganic acids and organic acids having 5 or less carbon atoms is considered to form its salt with the amine group of the sphingosine (A) by acid-base neutralization and the sphingosine cationized by this reaction acquires a function as an activator.
• the state of the salt of the sphingosine can be determined by an infrared absorption spectroscopy or a proton nuclear magnetic resonance spectroscopy which has conventionally been used for identification of the structure of a compound.
• the acid compound having a pH of 1 or greater but less than 7 as measured at 25° C. using its 0.1 mol/L aqueous solution is preferred, with that having a pH of from 1 to 6.5 being more preferred.
• inorganic acid examples include phosphoric acid, hydrochloric acid, nitric acid, sulfuric acid, perchloric acid and carbonic acid, with phosphoric acid and hydrochloric acid being preferred.
• organic acid examples include monocarboxylic acids such as formic acid, acetic acid, propionic acid, butyric acid, isobutyric acid, and valeric acid; dicarboxylic acids such as succinic acid, phthalic acid, fumaric acid, oxalic acid, malonic acid and glutaric acid; oxycarboxylic acids such as glycolic acid, citric acid, lactic acid, pyruvic acid, malic acid and tartaric acid; and amino acids such as glutamic acid and aspartic acid.
• monocarboxylic acids such as formic acid, acetic acid, propionic acid, butyric acid, isobutyric acid, and valeric acid
• dicarboxylic acids such as succinic acid, phthalic acid, fumaric acid, oxalic acid, malonic acid and glutaric acid
• oxycarboxylic acids such as glycolic acid, citric acid, lactic acid, pyruvic acid, malic acid and tartaric acid
• phosphoric acid hydrochloric acid, succinic acid, citric acid, lactic acid, glutamic acid and aspartic acid are preferred, with lactic acid, glutamic acid and aspartic acid being more preferred.
• Component (B) two or more compounds may be used in combination.
• the content of Component (B) in the cosmetic composition of the present invention is preferably from 0.001 to 10 weight %, more preferably from 0.005 to 3 weight %, still more preferably from 0.01 to 1.5 weight %.
• Component (B) is preferably added in an amount of at least 0.3 mole, preferably 0.3 to 5 moles, more preferably 0.5 to 3 moles, per mole of Component (A) in order to cationize the amine of the sphingosine (A).
• an aqueous solution of Component (B) mixed with an equimolar amount of Component (A) have a pH of from 2 to 6 at 25° C. (as measured by “HORIBA pH METER F-22” after correction with a phthalate standard solution).
• the cationized sphingosine salt which has acquired an activator-like function is considered to suppress crystallization of a ceramide having a close relationship with the hydrophobic moiety of the sphingosine and forms a stable emulsified condition.
• the ceramide which is Component (C) in the present invention is represented by the above-described formula (2).
• R 7 represents a linear, branched or cyclic, saturated or unsaturated C 4-30 (hydrocarbon group which may be substituted by a hydroxyl, carbonyl or amino group, preferably a linear, branched or cyclic, saturated or unsaturated C 7-22 hydrocarbon group which may be substituted by a hydroxyl group, or a hydrogen atom.
• Z represents a methylene group, a methine group or an oxygen atom.
• X 5 , X 6 and X 7 each independently represent a hydrogen atom, a hydroxyl group or an acetoxy group. It is preferred that at most one of X 5 , X 6 and X 7 represents a hydroxyl group and the remaining two represent a hydrogen atom.
• Z represents a methine group
• either X 5 or X 6 represents a hydrogen atom and the other one does not exist.
• X 4 is preferably a hydrogen atom or a glyceryl group.
• R 8 and R 9 each represent a hydrogen atom, a hydroxyl group, a hydroxymethyl group or an acetoxymethyl group.
• R 8 preferably represents a hydrogen atom or a hydroxymethyl group, while R 9 preferably represents a hydrogen atom.
• R 10 represents a linear, branched or cyclic, saturated or unsaturated C 5-60 hydrocarbon group which may be substituted by a hydroxyl, carboxy or amino group and may have an ether bond, ester bond or amide bond in its main chain.
• R 10 preferably represents a linear, branched or cyclic, saturated or unsaturated C 5-35 hydrocarbon group which may be substituted by a hydroxyl or amino group, or the above-described hydrocarbon group having, to the ⁇ position thereof, a linear, branched or cyclic, saturated or unsaturated C 8-22 fatty acid, which may be substituted by a hydroxyl group, ester-bound or amide-bound.
• fatty acid to be bound isostearic acid, 12-hydroxystearic acid or linoleic acid is preferred.
• R 11 represents a hydrogen atom, or a linear or branched, saturated or unsaturated hydrocarbon group having 1 to 30 carbon atoms in total and optionally having a substituent selected from hydroxyl, hydroxyalkoxy, alkoxy and acetoxy groups.
• R 7 represents a hydrogen atom and Z represents an oxygen atom
• R 11 is a hydrocarbon group having 10 to 30 carbon atoms in total.
• R 7 represents a hydrocarbon group
• R 11 represents a hydrocarbon group having 1 to 8 carbon atoms in total.
• a hydrogen atom and hydrocarbon groups which have 1 to 8 carbon atoms in total and may have 1 to 3 substituents selected from hydroxyl, hydroxyalkoxy and alkoxy groups are preferred.
• the hydroxyalkoxy and alkoxy groups those having 1 to 7 carbon atoms are preferred.
• Natural or natural type ceramide, or derivative thereof represented by formula (5) (which will hereinafter be called “natural type ceramide”) (wherein, R 21 represents a linear, branched or cyclic, saturated or unsaturated C 7-19 hydrocarbon group which may be substituted by a hydroxyl group; Z 1 represents a methylene or methine group; X 12 , X 13 and X 14 each independently represent a hydrogen atom, a hydroxyl group or an acetoxy group; X 15 represents a hydrogen atom, or forms an oxo group together with the adjacent oxygen atom (with the proviso that when Z 1 represents a methine group, either X 12 or X 13 represents a hydrogen atom and the other one does not exist, and when X 15 represents an oxo group, X 14 does not exist); R 22 represents a hydroxymethyl or acetoxymethyl group; R 23 represents
• R 21 a linear C 7-19 , more preferably C 13-15 alkyl group, and as R 24 a linear C 9-27 alkyl group which may be substituted by a hydroxyl group or a linear C 9-27 alkyl group having linoleic acid ester-bound thereto.
• X 15 preferably represents a hydrogen atom or forms an oxo group, together with an oxygen atom.
• R 24 a tricosyl group, a 1-hydroxypentadecyl group, a 1-hydroxytricosyl group, a heptadecyl group, a 1-hydroxyundecyl group or a nonacosyl group having linoleic acid ester-bound to the ⁇ position thereof is preferred.
• Ceramide Types 1 to 7 obtained by amidation of sphingosine, dihydrosphingosine, phytosphingosine or sphingadienine (for example, FIG. 2 of J. Lipid Res., 24: 759 (1983), and pig and human ceramides as described in FIG. 4 of J. Lipid Res., 35: 2069(1994)).
• N-alkyl derivatives for example, N-methyl derivative
• ceramides are also included.
• natural (D( ⁇ ) form) optically active derivatives unnatural (L(+) form) optically active derivatives or a mixture thereof may be used.
• the relative configuration of these compounds may be any one of the configuration of a natural form, that of an unnatural form and that of their mixture. More preferred ones are compounds such as CERAMIDE 1, CERAMIDE 2, CERAMIDE 3, CERMIDE 5, and CERAMIDE 6II (listed in INCI, 8th Edition) and those represented by the following formulas.
• They may be either compounds extracted from natural ceramides or synthesized ones thereof. Commercially available ones can also be used.
• Examples of the commercially available natural type ceramides include Ceramide I, Ceramide III, Ceramide IIIA, Ceramide IIIB, Ceramide IIIC, and Ceramide VI (each, product of Cosmo Ferm), Ceramide TIC-001 (product of Takasago International Corp.), CERAMIDE II (product of Quest International), DS-Ceramide VI, DS-CLA-Phytoceramide, C6-Phytoceramide and DS-ceramide Y3S (product of DOOSAN), and CERAMIDE 2 (product of Sederma.
• R 25 represents a linear, branched or cyclic, saturated or unsaturated C 10-22 hydrocarbon group which may be substituted by a hydroxyl group, or a hydrogen atom
• X 16 represents a hydrogen atom, an acetyl group or a glyceryl group
• R 26 represents a linear, branched or cyclic, saturated or unsaturated C 5-22 hydrocarbon group which may be substituted by a hydroxyl or amino group, or the above-described hydrocarbon group having, to the ⁇ position thereof, a linear or branched, saturated or unsaturated C 8-22 fatty acid, which may be substituted by a hydroxyl group, ester-bound
• R 27 represents a hydrogen atom or an alkyl group which has 1 to 30 carbon atoms in total and may have been substituted by a hydroxyl, hydroxyalkoxy, alkoxy or acetoxy group).
• R 26 are a nonyl group, a tridecyl group, a pentadecyl group, an undecyl group having linoleic acid ester-bound to the ⁇ position thereof, a pentadecyl group having linoleic acid ester-bound to the ⁇ position thereof, a pentadecyl group having 12-hydroxystearic acid ester-bound to the ⁇ position thereof, and an undecyl group having methyl-branched isostearic acid amide-bound to the ⁇ position thereof.
• R 27 is preferably an alkyl group which has 10 to 30, preferably 12 to 20 carbon atoms in total, and may be substituted by a hydroxyl, hydroxyalkoxy, alkoxy or acetoxy group when R 25 represents a hydrogen atom; or a hydrogen atom or an alkyl group which has 1 to 8 carbon atoms in total and may be substituted by a hydroxyl, hydroxyalkoxy, alkoxy or acetoxy group when R 25 represents a linear, branched or cyclic, saturated or unsaturated C 10-22 hydrocarbon group which may be substituted by a hydroxyl group.
• the hydroxyalkoxy or alkoxy group as R 27 preferably has 1 to 7 carbon atoms.
• the ceramide of formula (5) is preferably used in combination with the compound of formula (3) serving as Component (A), while the ceramide of formula (6) is preferably used in combination with the compound of formula (4) serving as Component (A).
• the compound of formula (1) use of the compound obtained by replacing COR 10 of the compound of formula (2) bound to the nitrogen atom with H is preferred from the viewpoints of stability and effects.
• Component (C) two or more of these ceramides may be used in combination.
• the content of Component (C) in the cosmetic composition of the present invention is preferably from 0.001 to 20 weight %, more preferably from 0.01 to 15 weight %, still more preferably from 0.1 to 10 weight %.
• a content ratio of Components (A) and (B) to Component (C) ((A)+(B)/(C)) in terms of weight % is preferably 0.0001 or greater, more preferably from 0.001 to 10, still more preferably from 0.01 to 6 from the viewpoint of stability with the passage of time.
• cholesterol which is, like a ceramide, one of intercellular lipids, and derivatives thereof, higher alcohols having 10 to 50 carbon atoms in total, and higher fatty acids having 10 to 50 carbon atoms in total can also be embraced in oil components emulsifiable by a sphingosine salt other than the ceramide.
• these oil components are preferably emulsified, together with the ceramide, by a sphingosine salt.
• cholesterol derivatives examples include cholesterol sulfate, isostearyl cholesteryl ester, dihydrocholesterol, cholesteryl stearate, dehydrocholesterol, cholesteryl hydroxystearate, phytosterol and the like.
• those having 9 to 25 carbon atoms in total are preferred and examples thereof include stearyl alcohol, cetyl alcohol, isostearyl alcohol, lanolin alcohol acetate, polyoxyethylene lanolin alcohol acetate, hydrogenated lanolin alcohol, cetostearyl alcohol, batyl alcohol lanolin alcohol and the like.
• the higher fatty acid those having 8 to 30 carbon atoms in total, preferably 10 to 22 carbon atoms in total are preferred. Examples thereof include stearic acid, palmitic acid myristic acid and the like.
• stearyl alcohol cetyl alcohol, batyl alcohol, cholesterol, stearic acid, palmitic acid and myristic acid are preferred.
• the oil component used as Component (D) in the present invention which is selected from polar oils and hydrocarbon oils, is a component to be emulsified by surfactant (E) as described later.
• polar oil examples include fatty acid esters such as diisostearyl malate, octyldodecyl lactate, isotridecyl isononanoate, isopropyl isostearate, and octyldodecyl myristate; ester oils composed of a fatty acid and an alcohol such as neopentyl glycol dicaprate; synthetic ester oils such as amino acid derivatives; and plant oils such as olive oil and jojoba oil.
• fatty acid esters such as diisostearyl malate, octyldodecyl lactate, isotridecyl isononanoate, isopropyl isostearate, and octyldodecyl myristate
• ester oils composed of a fatty acid and an alcohol such as neopentyl glycol dicaprate
• synthetic ester oils such as amino acid derivatives
• plant oils such as olive oil
• hydrocarbon oil examples include synthetic or natural ones in the liquid, semi-solid or solid form at 25° C.
• the hydrocarbon oils in the liquid form include liquid lanolin, liquid paraffin and squalane; and the hydrocarbon oils in the semi-solid or solid form include petrolatum, lanolin, ceresin, and waxes such as microcrystalline wax and the like.
• Component (D) two or more compounds may be used in combination.
• the content of Component (D) in the cosmetic composition of the present invention is preferably from 0.001 to 50 weight %, more preferably from 0.01 to 30 weight %, still more preferably from 0.01 to 20 weight %.
• the surfactant as Component (E) is used to emulsify the oil components other than the ceramide and is not used substantially for emulsification of the ceramide.
• the surfactant include, as well as nonionic surfactants, amphoteric surfactants, anionic surfactants, and cationic surfactants, and polymer surfactants such as hydroxyethyl cellulose, polyvinyl alcohol and alkyl-modified water soluble polymer compounds, for example, alkyl-modified polyacrylic acid and alkyl-modified polysaccharide; and natural surfactants such as saponin.
• nonionic surfactants cationic surfactants and alkyl-modified water soluble polymer compounds are preferred.
• the nonionic surfactants include polyoxyethylene hydrogenated castor oil, polyoxyethylene alkyl ethers, and polyoxyethylene sorbitan fatty acid esters.
• the cationic surfactants include dimethyldistearylammonium chloride, monoalkyltrimethylammonium chloridesd, ialkyldimethylammonium chlorides and the like.
• the alkyl-modified water soluble polymers include alkyl (meth)acrylate copolymers, alkyl-modified hydroxyethyl cellulose, and polysaccharide derivatives having both hydrophobic and hydrophilic groups as described in Japanese Patent Application Laid-Open No. Hei 11-12119.
• alkyl-modified water soluble polymer compounds are commercially available and examples include alkyl acrylate copolymers such as Aqulin 33 (product of ISP); acrylic acid/alkyl methacrylate copolymers (including cross-linked forms thereof) such as Pemulen TR-1, Pemulen TR-2, Carbopol 1382 and Carbopol ETD2020 (each, product of Noveon INC), and Aqupec HV-501ER (product of Sumitomo Seika Chemicals); and alkyl-modified hydroxyethyl cellulose such as Natrosol Plus 330 CS, and Polysurf 67 (each, belonging to Aqualon Group, Hercules Inc.).
• alkyl acrylate copolymers such as Aqulin 33 (product of ISP); acrylic acid/alkyl methacrylate copolymers (including cross-linked forms thereof) such as Pemulen TR-1, Pemulen TR-2, Carbopol 1382 and Carbopol ETD2020 (e
• polyoxyethylene alkyl ether ester copolymers of acrylic acid/methacrylic acid/alkyl acrylate/alkyl methacrylate/methacrylic acid such as alkyl acrylate/alkyl methacrylate/polyoxyethylene (20) stearyl ether copolymer (“Aqulin 22” (product of ISP)) obtained by having a polyoxyethylene alkyl ether ester-bound to a (meth)acrylic acid/alkyl (meth)acrylate copolymer are included.
• Component (E) two or more compounds may be used in combination.
• the content of Component (E) in the cosmetic composition of the present invention is preferably from 0.01 to 20 weight %, more preferably from 0.01 to 5 weight %, and still more preferably from 0.01 to 3 weight %.
• the amount of water contained in the oil-in-water emulsified cosmetic composition of the present invention is preferably from 5 to 99.9 weight %, more preferably from 30 to 99.9 weight % in the whole composition.
• Oil components other than Components (C) and (D) may be incorporated in the oil-in-water emulsified cosmetic composition of the present invention.
• Such oil components are emulsified substantially by either a sphingosine salt or surfactant serving as an emulsifier. They are preferably selected in consideration of the compatibility with the above-described oil component emulsified by each emulsifier.
• oils component substances ordinarily employed for cosmetic compositions other than the above-described substances, that is, synthetic or natural oil components in the liquid, semi-solid or solid form can be incorporated.
• oils such as dimethylpolysiloxane, dimethylcyclopolysiloxane, methylphenyl polysiloxane, methylhydrogen polysiloxane, and higher alcohol modified organopolysiloxane; and fluorine oils such as fluoropolyether and perfluoroalkyl ether silicone.
• oil component in the semi-solid or solid form examples include alkyl glyceryl ethers such as glycerin monostearyl ether, glycerin monocetyl ether and the like; and waxes such as carnauba wax, candelilla wax and the like.
• a humectant such as glycine betaine, urea or amino acid and the like
• a water soluble thickener such xanthan gum, hydroxyethyl cellulose, methyl cellulose or hydroxypropyl guar gum and the like
• a medicinal component such as allantoin or tocopherol acetate and the like
• an organic powder such as cellulose powder, nylon powder, crosslinked silicone powder, crosslinked methylpolysiloxane, porous cellulose powder, or porous nylon powder and the like
• an inorganic powder such as silica anhydride, zinc oxide or titanium oxide and the like
• a cool-feeling imparting agent such as menthol or camphor
• pH buffer, antioxidant, ultraviolet absorber, antiseptic, perfume, bactericide or colorant for example, a humectant such as glycine betaine, urea or amino acid and the like
• a water soluble thickener such xanthan gum, hydroxyethyl
• the oil-in-water emulsified cosmetic composition of the present invention can be prepared by mixing an emulsion obtained by emulsifying (C) the ceramide with a salt composed of (A) the sphingosine and (B) the acid compound and another emulsion obtained by emulsifying (D) the oil component selected from the polar oils and hydrocarbon oils with (E) the surfactant.
• a ceramide emulsion is obtained by dissolving (A) the sphingosine, (B) the acid compound selected from inorganic acids and organic acids having not greater than 5 carbon atoms, and (C) the ceramide under heat at a temperature permitting dissolution; adding about 10 weight % of water to the solution, and then stirring the mixture with a propeller or the like (using a homomixer if necessary).
• An OW emulsion is, on the other hand, preferably obtained by stirring (D) the oil component selected from polar oils and hydrocarbon oils, (E) the surfactant and remaining water by using a propeller (using a homomixer if necessary).
• the oil-in-water emulsified cosmetic composition is then obtained as a final product by mixing the ceramide emulsion with the OW emulsion and stirring.
• a component other than components (A) to (E) is used, it is, if it is anionic, preferably added at the temperature below the melting point of the ceramide emulsion.
• a water soluble component may be added at any stage during preparation of the ceramide emulsion or the OW emulsion, or even after they are mixed.
• the oil-in-water emulsified cosmetic composition of the present invention is suited for use as a cosmetic lotion, cosmetic emulsion, essence, UV protective cosmetic composition, makeup base, foundation, or makeup cosmetic composition.
• the oil-in-water emulsified cosmetic compositions having the compositions as shown in Table 1 were prepared by the process described below. The storage stability of each of the cosmetic compositions thus obtained was evaluated. The results are shown collectively in Table 1.
• Components (A) to (C) are dissolved under heat at from 80 to 90° C., followed by the addition of 10 weight % of water. The resulting mixture is stirred with a propeller or the like to obtain a ceramide emulsion. Components (D) and (E), remaining water and the other components are stirred with a propeller to obtain an OW emulsion. The ceramide emulsion and the OW emulsion are mixed while stirring, whereby an oil-in-water emulsified cosmetic composition is obtained.
• a 50-mL glass bottle is filled with each oil-in-water emulsified cosmetic composition and allowed to stand for one month under three conditions at 50° C., room temperature (25° C.) and ⁇ 5° C. The appearance is observed visually and evaluated based on the following criteria.
• the cosmetic emulsion having the composition as shown in Table 2 was prepared by the process described below.
• the cosmetic emulsion thus obtained was excellent in both emulsion stability and feeling upon use.
• Components from (3) to (7), (11) and (13) are dissolved under heat at 90° C.
• the resulting solution and another solution obtained by dissolving Components (1) and (2) in 5 weight % of water under heat at 90° C. are stirred for 20 minutes with a propeller, stirred in a homomixer (at 7000 rpm), and cooled to 25° C. while stirring with a propeller, whereby a ceramide emulsion is obtained.
• Components from (8) to (10) are dispersed in another solution obtained by dissolving Component (12) in the remaining water, followed by the addition of the ceramide emulsion. They are mixed by stirring to obtain a cosmetic emulsion.
• a cosmetic lotion having the composition as shown in Table 3 was prepared by the process described below. This Cosmetic lotion was excellent in both emulsion stability And feeling upon use.
• Components (1), (3), (7) and a portion (about 3 weight %) of Component (6) are dissolved under heat at from 80 to 90° C.
• another solution obtain by dissolving Component (2) and a portion (about 6 weight %) of water under heat at 80° C. is added in portions while stirring with a propeller and the reaction mixture is retained for 20 minutes.
• water (about 50 weight %) heated to about 80° C. the mixture is cooled to 25° C. while stirring with a propeller, whereby a ceramide emulsion is obtained.
• Components (4) and (5) and the remaining portion of Component (6) are dissolved under heat at from 80 to 90° C. While stirring with a propeller, the remaining water is added in portions to the resulting solution. After cooling to 25° C., the ceramide emulsion is added, followed by mixing while stirring, whereby a cosmetic lotion is obtained.
• the cosmetic emulsion having the composition as shown in Table 4 was prepared by the process described below.
• the cosmetic emulsion thus obtained was excellent in both emulsion stability and feeling upon use.
• Components from (3) to (7), (11) and (13) shown in Table 4 are dissolved under heat at 90° C.
• the resulting solution and another solution obtained by dissolving Components (1) and(2) in a portion (about 5 weight %) of water under heat at 90° C. are stirred with a propeller for 20 minutes, stirred in a homomixer (at 7000 rpm) and cooled to 25° C. while stirring with a propeller, whereby a ceramide emulsion is obtained.
• Components (8) to (10) are dispersed using a homomixer (at 7000 rpm), followed by the addition of the ceramide emulsion. They are mixed while stirring to obtain a cosmetic emulsion.
• the oil-in-water emulsified cosmetic composition of the present invention stably contains oil components including a ceramide and the like, and has excellent storage stability.

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• 2004
  • 2004-06-08 KR KR1020040041688A patent/KR101153576B1/ko active IP Right Grant
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