CN114073643A - Oil-in-water type cosmetic composition free from cloudiness - Google Patents

Oil-in-water type cosmetic composition free from cloudiness Download PDF

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CN114073643A
CN114073643A CN202010817226.6A CN202010817226A CN114073643A CN 114073643 A CN114073643 A CN 114073643A CN 202010817226 A CN202010817226 A CN 202010817226A CN 114073643 A CN114073643 A CN 114073643A
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oil
cosmetic composition
weight
parts
water type
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金文周
郑舒希
申爀峻
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LG H&H Co Ltd
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LG Household and Health Care Ltd
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00Cosmetics or similar toiletry preparations
    • A61K8/02Cosmetics or similar toiletry preparations characterised by special physical form
    • A61K8/04Dispersions; Emulsions
    • A61K8/06Emulsions
    • A61K8/062Oil-in-water emulsions
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00Cosmetics or similar toiletry preparations
    • A61K8/18Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/30Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
    • A61K8/33Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
    • A61K8/34Alcohols
    • A61K8/345Alcohols containing more than one hydroxy group
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00Cosmetics or similar toiletry preparations
    • A61K8/18Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/30Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
    • A61K8/55Phosphorus compounds
    • A61K8/553Phospholipids, e.g. lecithin
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K2800/00Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
    • A61K2800/20Chemical, physico-chemical or functional or structural properties of the composition as a whole
    • A61K2800/30Characterized by the absence of a particular group of ingredients
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K2800/00Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
    • A61K2800/20Chemical, physico-chemical or functional or structural properties of the composition as a whole
    • A61K2800/30Characterized by the absence of a particular group of ingredients
    • A61K2800/34Free of silicones
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K2800/00Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
    • A61K2800/40Chemical, physico-chemical or functional or structural properties of particular ingredients
    • A61K2800/42Colour properties

Abstract

An oil-in-water type cosmetic composition free from cloudiness. The oil-in-water type cosmetic composition according to the present invention can provide a cosmetic composition having no cloudiness and excellent formulation stability by simultaneously containing a fatty alcohol and a lecithin type surfactant as an organic/natural cosmetic composition containing no polyethylene glycol type surfactant, silicone oil and/or synthetic polymer.

Description

Oil-in-water type cosmetic composition free from cloudiness
Technical Field
The present invention relates to an oil-in-water type cosmetic composition free from a white turbidity phenomenon, and more particularly, to an oil-in-water type cosmetic composition which does not contain a polyethylene glycol surfactant, a synthetic polymer and a silicone oil, has an excellent skin absorption rate, and is free from a white turbidity phenomenon.
Background
Polyethylene glycol (PEG) type surfactants and synthetic polymers have been widely used in common oil-in-water emulsions as materials that contribute to formulation stability and viscosity build. However, ethylene oxide (ethylene oxide) and 1,4-dioxane (1,4-dioxane) components, which may be generated as byproducts during the synthesis of polyethylene glycol surfactants, are regulated as carcinogenic substances, and consumers' negative recognition of the use of polyethylene glycol surfactants is increasing due to concerns about the residues of byproducts in the raw materials.
Silicone oils (e.g., cyclomethicone, dimethicone) have been widely used in cosmetics to improve the white turbidity phenomenon occurring when applied to the skin and to achieve a light and silky feeling in use in a general oil-in-water type emulsion. Among them, polydimethylsiloxane having a large molecular weight can provide a high defoaming capability even in a small amount, and is therefore widely used as a defoaming agent in emulsion products. However, as the problem of water contamination of silicone oils and the recognition of skin harmfulness have increased, so too have the consumer's negative recognition of the use of silicone oils.
Moreover, consumers' interest in raw materials used in cosmetics has increased, and therefore consumers prefer products using natural or organic raw materials over products using synthetic raw materials, and have negative recognition not only on products containing raw materials known to be harmful to the human body (e.g., polyethylene glycol-based surfactants, silicone oils, paraben-based preservatives), but also on products containing synthetic polymers themselves. Accordingly, it is a fact that there is an increasing demand for the development of natural cosmetics or organic cosmetics which do not use polyethylene glycol-based surfactants, silicone oils and synthetic polymers.
The synthetic polymer contributes to the formulation stability and viscosity formation even in a small amount, the polyethylene glycol-based surfactant also increases the formulation stability even in a small amount, and the silicone oil prevents the clouding phenomenon of the cosmetic and imparts a silky and soft feeling in use, but these components are not included in the natural/organic emulsion formulation, thus significantly degrading the stability and quality of the emulsion.
Moreover, emulsions of natural/organic materials present the following problems: the skin-care product is applied and used on the skin, the feeling is very dry and astringent, the absorption is slow, and the whitish and turbid phenomenon appears. Also, when a natural polymer is used instead of a synthetic polymer, a composition having a desired level of viscosity can be obtained by using a larger amount of a natural polymer such as fatty alcohol and natural wax than the synthetic polymer, but in this case, the large amount of the natural polymer makes the feeling of use of an emulsion drier and generates bubbles when applied to and rubbed with the skin, and such bubbles do not defoam, thus further aggravating the white turbidity phenomenon that the cosmetic remains white on the skin surface.
Therefore, there is a need to develop a dosage form capable of improving the white turbidity phenomenon, dry feeling in use, and slow and low absorption force directly related to the quality even in a cosmetic composition of natural/organic materials not containing a polyethylene glycol-based surfactant, a silicone oil, and a synthetic polymer.
Disclosure of Invention
Problems to be solved by the invention
The present inventors have conducted studies to improve stability and feeling in use and solve the problem of the white turbidity phenomenon in a cosmetic composition which does not contain a polyethylene glycol-based surfactant, a silicone oil and minimizes the use of a synthetic polymer, and as a result, have confirmed that if octyl dodecanol and a lecithin-based surfactant are contained, a composition having no problem of the white turbidity phenomenon while maintaining the stability of the composition can be provided, thereby completing the present invention.
Accordingly, an object of the present invention is to provide an oil-in-water type cosmetic composition having excellent stability of emulsion particles, and simultaneously having excellent skin absorption and degree of attachment, thereby not causing a white turbidity phenomenon, by including octyldodecanol or two or more fatty alcohols selected from the group consisting of octyldodecanol, cetostearyl alcohol, and behenyl alcohol, and a lecithin type surfactant, together with no polyethylene glycol type surfactant and silicone oil.
Means for solving the problems
As a means for solving the above problems, the present invention provides an oil-in-water type cosmetic composition comprising octyldodecanol or two or more fatty alcohols selected from the group consisting of octyldodecanol, cetearyl alcohol and behenyl alcohol, and a lecithin-based surfactant.
Also, the present invention provides the use of a cosmetic composition for preparing cosmetics, and the above cosmetic composition may be an oil-in-water type cosmetic composition comprising octyldodecanol or two or more fatty alcohols selected from the group consisting of octyldodecanol, cetearyl alcohol, and behenyl alcohol, and a lecithin-based surfactant.
The cosmetic composition of the present invention may contain the polyethylene glycol-based surfactant and/or the silicone oil in an amount of 0.1 part by weight or less, or 0.01 part by weight or less, relative to 100 parts by weight of the total cosmetic composition, and preferably, the cosmetic composition may not contain the polyethylene glycol-based surfactant and/or the silicone oil.
The above oil-in-water type cosmetic composition may contain 0.1 to 10 parts by weight of a lecithin-based surfactant and 0.5 to 12 parts by weight of a fatty alcohol, relative to 100 parts by weight of the total composition.
The above oil-in-water type cosmetic composition may contain 0.1 to 5 parts by weight of a lecithin-based surfactant and 1 to 12 parts by weight of a fatty alcohol, relative to 100 parts by weight of the total composition.
The fatty alcohols may include octyldodecanol, cetearyl alcohol and behenyl alcohol.
The above oil-in-water type cosmetic composition may include 1 to 7 parts by weight of octyldodecanol, 0.5 to 3 parts by weight of cetearyl alcohol, and 0.5 to 1.5 parts by weight of behenyl alcohol, with respect to 100 parts by weight of the entire composition.
The oil-in-water type cosmetic composition may further comprise a vegetable oil.
The content of the above vegetable oil may be 1 to 30 parts by weight with respect to 100 parts by weight of the total oil-in-water type cosmetic composition.
The oil-in-water type cosmetic composition may further comprise one or more selected from the group consisting of natural emulsifiers and natural emulsification aids.
The natural emulsification aid may be contained in an amount of 1 to 9 parts by weight, relative to 100 parts by weight of the total oil-in-water type cosmetic composition.
The lightness of the skin of the above composition measured with a colorimeter and then calculated according to the following formula 1 may be less than 1.5.
[ general formula 1]
Figure BDA0002633159100000031
The cosmetic composition may be in the form of lotion, cleanser, oil, lotion, cream, stick, essence, cosmetic ointment, Balm (Balm), spray, gel, pack, or powder.
The oil-in-water type cosmetic composition may further comprise one or more selected from the group consisting of a solvent, a fragrance, a thickener, a humectant and a preservative.
Further, the present invention provides a method for preparing the oil-in-water type cosmetic composition. The cosmetic composition prepared by the preparation method of the present invention has the following advantages: has excellent stability over time, and thus can improve the preparation efficiency and the storage and storage efficiency of the product. Moreover, the following advantages are provided: the white turbidity phenomenon does not occur, so that the cosmetic can meet the preference of consumers when being prepared.
The method for preparing the oil-in-water type cosmetic composition of the present invention comprises:
adding the thickening agent into the solvent and dispersing for 10 to 50 minutes;
adding a water-soluble raw material to the dispersion and heating to 50 ℃ to 100 ℃ to prepare an aqueous phase mixture;
mixing octyldodecanol or two or more fatty alcohols selected from the group consisting of octyldodecanol, cetearyl alcohol and behenyl alcohol, and a lecithin-based surfactant and heating to 50 ℃ to 100 ℃ to prepare an oil phase mixture;
adding an oil phase mixture to the above aqueous phase mixture at 50 to 100 ℃ and emulsifying for 5 to 30 minutes using a homomixer at 2000 to 4000 rpm; and
the emulsified oil phase-water phase mixture is cooled to 20 to 30 ℃ and defoamed.
The preparation method can also comprise the following steps: adding one or more selected from the group consisting of an ultraviolet ray blocking agent, a neutralizer, a thickener, a perfume, an antioxidant, a pigment, a solvent, a humectant and a preservative to the oil phase-water phase mixture, and emulsifying at 2000 to 4000rpm for 5 to 30 minutes using a homomixer.
The solvent includes, but is not limited to, those generally used in the art of the present invention, and may be, for example, purified water, but is not limited thereto.
The water-soluble material may include a solvent and/or a humectant. The above-mentioned solvents and humectants may include, but are not limited to, those generally used in the art of the present invention.
The above oil phase mixture may be prepared by further comprising one or more selected from the group consisting of an emulsification aid, a preservative and a vegetable oil.
In the preparation step of the above oil phase mixture, with respect to the fatty alcohol and the lecithin-based surfactant, 0.1 to 10 parts by weight of the lecithin-based surfactant and 0.5 to 12 parts by weight of the fatty alcohol may be contained with respect to 100 parts by weight of the whole oil-in-water type cosmetic composition.
The fatty alcohols may include octyldodecanol, cetearyl alcohol and behenyl alcohol. As for the aforementioned octyldodecanol, cetearyl alcohol and behenyl alcohol, 1 to 7 parts by weight of octyldodecanol, 0.5 to 3 parts by weight of cetearyl alcohol and 0.5 to 1.5 parts by weight of behenyl alcohol may be included with respect to 100 parts by weight of the entire oil-in-water type cosmetic composition.
The oil phase mixture may be prepared by further comprising a vegetable oil, and the vegetable oil may be contained in an amount of 1 to 30 parts by weight with respect to 100 parts by weight of the entire oil-in-water type cosmetic composition.
The oil phase mixture may be prepared by further including a natural emulsification aid, and the natural emulsification aid may be included in an amount of 1 to 9 parts by weight with respect to 100 parts by weight of the entire oil-in-water type cosmetic composition.
Hereinafter, the constitution of the present invention will be described in detail.
The oil-in-water type cosmetic composition of the present invention comprises octyldodecanol or two or more fatty alcohols selected from the group consisting of octyldodecanol, cetearyl alcohol and behenyl alcohol, and a lecithin-based surfactant.
The cosmetic composition of the present invention comprises a lecithin surfactant and a fatty alcohol for solving the white turbidity phenomenon that bubbles generated when a cosmetic is applied cannot be removed without using a conventional PEG-based surfactant, synthetic polymer or silicone oil, thus leaving the cosmetic white on the skin.
In the present invention, lecithin-based surfactants are used as natural surfactants, and are meant to include all lecithins or surface active ingredients derived therefrom. The lecithin-based surfactants described above may be included to increase the initial viscosity of the composition and to stabilize the dosage form. In particular, lecithin surfactants derived from natural sources have attracted attention as a substitute for PEG surfactants, but have the following problems: when a lecithin surfactant is used alone in an oil-in-water type cosmetic composition, the desired physical properties of the cosmetic cannot be maintained.
In the present invention, the above lecithin-based surfactant may be selected from the group consisting of lecithin, hydrogenated lecithin, soybean lecithin, hydrogenated lecithin/C12-16 alcohol/palmitic acid, lysolecithin, phosphatidylcholine (hydrogenated), and hydrogenated phospholipid, but is not limited thereto.
The present invention may include the above lecithin-based surfactant in an amount of 0.1 to 5 parts by weight, 0.1 to 4 parts by weight, 0.1 to 3 parts by weight, 1 to 5 parts by weight, 1 to 4 parts by weight, or 1 to 3 parts by weight, relative to 100 parts by weight of the total oil-in-water type cosmetic composition.
The fatty alcohol (fat alcohol) is a higher alcohol having 6 or more carbon atoms, and is technically characterized by including octyldodecanol or two or more selected from the group consisting of octyldodecanol, cetearyl alcohol and behenyl alcohol for suppressing the white turbidity phenomenon in the oil-in-water type cosmetic and improving the stability and absorbability of the cosmetic.
Specifically, the fatty alcohol may be octyldodecanol; cetearyl alcohol and behenyl alcohol; octyl dodecanol and cetostearyl alcohol; octyl dodecanol and behenyl alcohol; or octyldodecanol, cetostearyl alcohol and behenyl alcohol.
In particular, for the present invention, it is preferable that octyldodecanol is necessarily contained, and when octyldodecanol (which is a fatty alcohol in a branched form) is contained, it is used as a defoaming agent in a cosmetic composition containing a lecithin-based surfactant, while having an excellent defoaming effect of removing bubbles occurring at the time of friction.
Moreover, the following properties are exhibited in an oil-in-water type cosmetic composition comprising both cetearyl alcohol and behenyl alcohol and octyldodecanol: the visual stability of the cosmetic composition is significantly improved, and the skin-fit of the composition is very excellent.
The present invention may include 0.5 to 12 parts by weight, 1 to 12 parts by weight, or 2 to 12 parts by weight of the fatty alcohol, relative to 100 parts by weight of the total oil-in-water type cosmetic composition. When the content of the fatty alcohol in the cosmetic composition of the present invention exceeds 12 parts by weight, there may occur a problem that the stability of the oil-in-water type cosmetic composition is rather deteriorated.
The fatty alcohol may include octyldodecanol, cetearyl alcohol and/or behenyl alcohol.
The aforementioned octyldodecanol may be included in a cosmetic composition as a fragrance or skin softener, and is known to help protect skin and impart conditioning. The aforementioned octyldodecanol may be C7 to C50, and preferably may be C7 to C30. When the number of carbon atoms of octyldodecanol is longer, it exhibits solid characteristics at room temperature, and the diffusion rate decreases as the molecular weight increases, thus posing a problem of a decrease in the effect of reducing the cloudiness of the dosage form.
The aforementioned octyldodecanol may be contained in an amount of 0.5 to 12 parts by weight, 0.5 to 11 parts by weight, 0.5 to 10 parts by weight, 0.5 to 9 parts by weight, 0.5 to 8 parts by weight, 0.5 to 7, 1 to 12 parts by weight, 1 to 11 parts by weight, 1 to 10 parts by weight, 1 to 9 parts by weight, 1 to 8 parts by weight, 1 to 7 parts by weight, 2 to 12 parts by weight, 2 to 11 parts by weight, 2 to 10 parts by weight, 2 to 9 parts by weight, 2 to 8 parts by weight, or 2 to 7 parts by weight, relative to 100 parts by weight of the total oil-in-water type cosmetic composition. When the content of octyldodecanol is less than 0.5 parts by weight, the cloudiness phenomenon of the emulsion may be increased, and the stability and absorbability may be decreased. Further, when the octyldodecanol content exceeds 12 parts by weight, there is a problem that the stability of the oil-in-water type composition becomes poor.
The cetearyl alcohol may be present in an amount of 0.5 to 3 parts by weight, 0.8 to 3 parts by weight, 1 to 3 parts by weight, 0.5 to 2.5 parts by weight, or 0.5 to 2 parts by weight. The cetearyl alcohol described above is included in the cosmetic composition of the present invention together with a lecithin-based surfactant, thereby playing a role in suppressing the clouding phenomenon and improving the stability of the emulsion in an oil-in-water type emulsion composition. When the above cetearyl alcohol is contained in an amount of less than 0.5 parts by weight, the stability of the dosage form may be unstable, and when the content exceeds 3 parts by weight, initial bubbles are excessively generated and the phenomenon of cloudiness may be aggravated upon rubbing on the skin.
The content of the behenyl alcohol may be 0.5 to 2 parts by weight, 0.5 to 1.5 parts by weight, or 0.5 to 1 part by weight. The above behenyl alcohol is included together with the lecithin-based surfactant in the cosmetic composition of the present invention, thereby playing a role in suppressing the clouding phenomenon and improving the stability of the emulsion in the oil-in-water type emulsion composition. When the content of the above behenyl alcohol is less than 0.5 parts by weight, the stability of the formulation may be unstable, and when the content exceeds 3 parts by weight, initial bubbles are excessively generated upon rubbing on the skin, and thus the cloudiness phenomenon may be increased.
In particular, when the fatty alcohol of the present invention includes octyldodecanol, cetearyl alcohol and behenyl alcohol together, the total content of the above three ingredients should not exceed 12 parts by weight with respect to 100 parts by weight of the total oil-in-water type cosmetic composition. Specifically, the fatty alcohol may be included in an amount of 1 to 12 parts by weight or 2 to 12 parts by weight, relative to 100 parts by weight of the total oil-in-water type cosmetic composition, or 1 to 7 parts by weight of octyldodecanol, 0.5 to 3 parts by weight of cetearyl alcohol, and 0.5 to 1.5 parts by weight of behenyl alcohol, relative to 100 parts by weight of the total composition. Alternatively, 1 to 7 parts by weight of octyldodecanol, 0.5 to 2 parts by weight of cetostearyl alcohol and 0.5 to 1 part by weight of behenyl alcohol may be included, relative to 100 parts by weight of the entire composition.
When the total content of the above three components exceeds 12 parts by weight, the stability of the oil-in-water type composition may be deteriorated. In particular, the stability with time is poor, and there is a possibility that the physical properties of the composition may be changed.
In one embodiment of the present invention, experiments confirmed that the effect of removing the white turbidity phenomenon in the cosmetic composition is most excellent when octyl dodecanol, cetearyl alcohol and behenyl alcohol of the present invention or all of octyl dodecanol, cetearyl alcohol and behenyl alcohol are included together with the lecithin-based surfactant, even when compared with other fatty alcohols. Specifically, in table 2, when cetostearyl alcohol alone, behenyl alcohol alone, jojoba alcohol or isostearyl alcohol is included, the lightness value according to formula 1 is 3 or more despite combination with lecithin-based surfactants, so that the cloudiness phenomenon cannot be solved at all, and when the fatty alcohol of the present invention is included, the lightness value is 1.5 or less, thereby exhibiting the same or more excellent cloudiness reduction effect as in the case of including polydimethylsiloxane as a conventional antifoaming agent.
Therefore, in the oil-in-water type cosmetic composition of the present invention, particularly, when the fatty alcohol and lecithin type surfactant of the present invention are simultaneously contained in the cosmetic composition which does not contain polyethylene glycol (PEG) type surfactant and/or silicone oil and contains a natural emulsifier to thereby exacerbate the clouding phenomenon, it can be seen that the clouding phenomenon of the composition can be effectively removed and the emulsion stability and the absorption degree become remarkably excellent.
In this respect, the cosmetic composition of the present invention does not contain a polyethylene glycol-based surfactant and/or a silicone oil, and thus can provide an oil-in-water type cosmetic composition which is safe without causing or significantly reducing side effects such as skin toxicity or problems caused by the above-mentioned components, and which is less irritating to the skin, while having excellent spreadability, without causing a white turbidity phenomenon, and having excellent skin absorption rate.
In particular, the cosmetic composition of the present invention may contain 0.1 part by weight or less, or 0.01 part by weight or less, or 0.001 part by weight or less of the polyethylene glycol-based surfactant and/or the silicone oil with respect to 100 parts by weight of the total cosmetic composition, and preferably, the cosmetic composition may not contain the polyethylene glycol-based surfactant and/or the silicone oil.
As the above-mentioned polyethylene glycol-based surfactant, there may be selected from the group consisting of PEG-100 stearate, PEG-150 distearate, PEG-10 polydimethylsiloxane, cetyl PEG/PPG-10/1 polydimethylsiloxane, PEG-40 hydrogenated castor oil, PEG-120 methyl glucose dioleate, PEG-7 glyceryl cocoate, PEG-7 hydrogenated castor oil, PEG-40 stearate, PEG-60 hydrogenated castor oil and PEG-30 dipolyhydroxystearate, but not limited thereto.
The silicon-based oil of the present invention may include all kinds of silicon-based fluid oils, silicon-based crosslinked polymers dispersed in oils, and the like. As a specific example, as the silicon-based fluid oil, including cyclopentasiloxane, cyclohexasiloxane, cycloheptasiloxane, cyclomethicone, cyclophenylpmethicone, cyclotetrasiloxane, cyclotrisiloxane, polydimethylsiloxane, octyldimethicone, octanoylpolymethicone, octanoylpmethicone, cetearylmethylsiloxane, cetylmethicone, hexylmethicone, lauryl methicone, myristylmethicone, phenyl methicone, stearyl dimethicone, trifluoropropyl methicone, cetyl dimethicone, diphenylsiloxyphenyl trimethicone, dimethylpolysiloxane, methylphenylpolysiloxane, decamethylcyclopentasiloxane, methylpolymethicone, or phenyl trimethicone, and the like. Also, as the silicon-based crosspolymer, all of polydimethylsiloxane crosspolymers, polydimethylsiloxane/vinylpolydimethylsiloxane crosspolymers, polydimethylsiloxane PEG-10/15 crosspolymers or PEG-12 polydimethylsiloxane/PPG-20 crosspolymers are included, but not limited thereto.
Further, the synthetic polymer is a polymer which is not naturally derived but chemically synthesized. More specifically, it refers to a chemically synthesized polymer for viscosity modifier, stability improvement or feeling in use improvement. Examples thereof include synthetic viscosity modifiers, synthetic stabilizers, synthetic feel improvers and synthetic thickeners, and examples thereof include carbomers, acrylic acid ester/C10-30 alkanol acrylate crosspolymers, ammonium acryloyldimethyltaurate/VP copolymers, hydroxyethyl acrylate/sodium acryloyldimethyltaurate copolymers, polyacrylamides, polyacrylate-13, sodium polyacrylates and VP/dimethylaminoethyl methacrylate copolymers, but are not limited thereto.
In conventional cosmetics, the feeling of use, the clouding phenomenon caused by air bubbles, or the formulation stability of oil-in-water type cosmetics can be maintained by using PEG surfactants or silicone oils, but they are excluded from cosmetics due to the negative effects of ingredients, and thus there is a continuous need to develop ingredients that can replace them. As an alternative ingredient to such synthetic surfactants, lecithin surfactants or cetearyl glucoside; cetearyl olive oleate and sorbitan olive oleate; polyglyceryl-2 stearate; or natural emulsifiers such as sucrose stearate and sucrose tristearate, but the composition containing these natural emulsifiers has a reduced visual stability, a reduced skin absorption power of the cosmetic, and an increased white turbidity phenomenon in which white remains on the skin surface, and thus it is difficult to have satisfactory formulation characteristics as a cosmetic. However, the present invention solves the problems occurring in natural cosmetics by adding the above combination of lecithin-based surfactants and fatty alcohols, and confirms that a cosmetic composition having improved visual stability, degree of formulation adherence, absorbability and white turbidity can be provided.
The oil-in-water type cosmetic composition of the present invention may further contain a fatty alcohol other than the above-mentioned type of fatty alcohol within a range in which the content of the fatty alcohol does not exceed 10 parts by weight with respect to 100 parts by weight of the entire composition.
The additional fatty alcohol may be selected from the group consisting of stearyl alcohol, cetyl alcohol, and fatty alcohols of C12 to C22, but is not limited thereto. The above-mentioned fatty alcohols may be included for viscosity formation and dosage form stability of the composition.
The oil-in-water type cosmetic composition of the present invention may further comprise a vegetable oil. The vegetable oil may be a natural vegetable oil used in cosmetics, or a vegetable oil obtained by synthesizing a natural vegetable component.
As the vegetable oil, avocado oil, wheat germ oil, rosehip oil, shea butter, almond oil, olive oil, macadamia nut oil, argan oil, meadowfoam oil, sunflower oil, castor oil, camellia oil, corn oil, safflower oil, soybean oil, rapeseed oil, macadamia nut oil, jojoba oil, palm kernel oil, or coconut oil can be used, but not limited thereto.
The content of the above vegetable oil may be 1 to 30 parts by weight with respect to 100 parts by weight of the total oil-in-water type cosmetic composition. When the content of the vegetable oil is less than 1 part by weight, there is a problem that the emulsifier and the emulsification aid are precipitated, and when the content exceeds 30 parts by weight, the stability of the cosmetic may be hindered, thereby deteriorating physical properties.
The oil-in-water type cosmetic composition of the present invention may further comprise one or more selected from the group consisting of an emulsifier and an emulsification aid. The emulsifier or emulsification aid may be a natural emulsifier or natural emulsification aid.
As an example, the natural emulsifier may be one or more selected from the group consisting of cetearyl glucoside, cetearyl olive oleate, sorbitan olive oleate, polyglycerin-2 stearate, sucrose stearate, and sucrose tristearate, but is not limited thereto. The lecithin-based surfactant of the present invention may further contain a natural emulsifier, but may be contained within a range that does not impair physical properties of the cosmetic.
For example, the natural emulsification aid may be glyceryl stearate, but is not limited thereto. The natural emulsification aid may be contained in an amount of 1 to 9 parts by weight, relative to 100 parts by weight of the total oil-in-water type cosmetic composition.
For the cosmetic composition of the present invention, the lightness value of the above composition calculated according to the following formula 1 after measuring the lightness of the skin with a colorimeter may be less than 1.5. Preferably, the brightness value may be less than 1.0.
[ general formula 1]
Figure BDA0002633159100000091
With the cosmetic composition of the present invention, a composition that does not cause a phenomenon of cloudiness caused by air bubbles when applied to the skin and has excellent skin absorption power and degree of fitting can be provided in a cosmetic composition containing natural ingredients by containing a combination of a lecithin-based surfactant and a fatty alcohol. This effect can be confirmed by the lightness value using a colorimeter, and the composition of the present invention comprising a combination of a lecithin-based surfactant and a fatty alcohol has the following characteristics: the value obtained by subtracting the a1 value from the lightness value (a2) measured after the cosmetic was applied to the skin, multiplied by 100, is less than 1.5 with respect to the lightness value (a1) before the cosmetic was applied to the skin.
The above-mentioned color difference meter evaluation may be a value obtained by measuring the skin lightness (lightness) with a color difference meter (MINOLTA SPECTROPHOTOMETER CM-3700d) after rolling 20 times over the skin under the following conditions: measuring wavelength interval of 10 nm; a light source pulse xenon lamp for measurement; transmitted color measurement mode d/0 (diffuse illumination/0 ° received light); and the Interface RS-232C standard.
When the oil-in-water type cosmetic of the present invention is measured under the above conditions, when the lightness value shown in formula 1 satisfies the condition of less than 1.5, it is confirmed through a specific experiment that the composition has the following characteristics: no cloudiness and excellent stability and absorbability.
The composition of the present invention may include a natural material including the above natural polymer in an amount of 95% or more by weight of the total composition.
The natural polymer is obtained from a natural product or a natural product, or simply modified from a natural product or a natural product-derived component, or contains a synthetic component among natural-derived components, and is intended to exclude a chemically synthesized component (which is not a natural-derived component) synthesized by an artificial method.
For example, the natural raw materials may be cosmetic raw materials of organic standards and environmental certification levels established by the country or natural source levels that can be matched with the organic standards and the environmental certification levels.
The natural product or the raw material derived from a natural product refers to components such as an organic raw material, a plant and plant-derived raw material, an animal and animal-derived raw material, a mineral and mineral-derived raw material, and water. Examples of the inorganic filler include, but are not limited to, microcrystalline cellulose, cellulose gum, sclerotium rolfsii gum, xanthan gum, gum arabic, gellan gum, rhizobia gum, carrageenan, and sodium hyaluronate.
The above-mentioned environmental certification standards, which are compositions composed of components excluding synthetic processes and cultivated and processed in an environmental protection manner, include ecocert of france, Cosmos of europe, usda (us Department of agency) of the united states, bdih (Association of germany and Trading firms) of germany, jas (japan Association of standard) of japan, and the like, and meet consumer demands that favor recent environmental protection products, and environmental certification systems for performing safety certification on components or products are being widely developed in various countries. Although countries show dissimilarities in detailed values, ranges, and the like, the primary constituents of raw materials and components show global uniformity in the scope of environmental certification under a large framework. Natural ingredients derived from nature are included in the range of environmentally friendly organic ingredients, and other semi-Processed ingredient classes are classified into ppai (physically Processed Agro informant) and cpai (chemically Processed Agro informant), so that only raw materials meeting these standards are provided with certifications such as ecocert, Cosmos, or USDA.
In the present invention, the nationally established organic and environmental certification materials and ingredients refer to cosmetic materials and compositions that are composed of only ingredients that meet or can meet the nationally established organic standards and environmental certification standards, and thus can meet the nationally established organic and environmental grades. For example, those consisting only of components that meet or can meet standards set by the Chinese government or organic and environmental certification standards recognized by China.
In addition to the above constitution, the cosmetic composition according to the present invention may further comprise purified water and additional oil phase components. The content of the above oil phase component is not particularly limited, and may be contained in the composition in a remaining content other than the above fatty alcohol, lecithin-based surfactant and purified water.
Specifically, the cosmetic composition of the present invention may contain one or more of oil or wax as an oil phase component. The above oils and waxes may be applied to all those generally used in the art as cosmetic ingredients. For example, as the oil, ester oil, triglyceride oil, hydrocarbon oil, or vegetable oil may be used, and one or more of these components may be used in combination as necessary.
As the wax, any of hydrocarbon waxes, vegetable waxes, silicone waxes, and the like which are generally used in cosmetics can be used. For example, there may be included candelilla wax, carnauba wax, rice wax, beeswax, lanolin, ozokerite, ceresin, paraffin wax, microcrystalline wax, synthetic wax, polyglycerin-3 beeswax, rose wax, rice bran wax, olive oil unsaponifiable matter, C30-C45 alkyldimethylsilyl polypropylsilsesquioxane, ethylene/propylene copolymer, or polyethylene wax, but not limited thereto.
Also, the cosmetic composition of the present invention may further comprise various ingredients that can be used in general cosmetics, such as a moisturizing agent, an ultraviolet ray blocking agent, a neutralizing agent, a thickening agent, a perfume, a preservative, an antioxidant or a pigment.
More specifically, the oil-in-water type cosmetic composition of the present invention may include one or more selected from the group consisting of a solvent, a thickener, a humectant and a solvent in an aqueous phase mixture; the oil phase mixture contains lecithin surfactant and fatty alcohol. The oil phase mixture may further include one or more selected from the group consisting of an emulsification aid, a preservative and a vegetable oil.
According to a more specific embodiment of the present invention, the oil-in-water type cosmetic composition of the present invention may comprise xanthan gum, glycerin, butylene glycol; a lecithin-based surfactant and octyldodecanol are included in the oil phase mixture; cetearyl alcohol and behenyl alcohol; octyl dodecanol and cetostearyl alcohol; octyl dodecanol and behenyl alcohol; or fatty alcohols of octyldodecanol, cetostearyl alcohol and behenyl alcohol and vegetable oils.
The above composition may contain 0.1 to 0.5 parts by weight of xanthan gum with respect to 100 parts by weight of the entire composition; 5.0 to 11.0 parts by weight of glycerol; 1.0 to 5.0 parts by weight of butanediol; 0.1 to 5 parts by weight of a lecithin-based surfactant; 1 to 12 parts by weight of a fatty alcohol; 1.0 to 10.0 parts by weight of olive oil; and the balance of purified water.
Also, the above composition may comprise 1 to 7 parts by weight of octyldodecanol; 0.5 to 3 parts by weight of cetearyl alcohol and 0.5 to 1.5 parts by weight of behenyl alcohol; 1 to 7 parts by weight of octyl dodecanol and 0.5 to 3 parts by weight of cetostearyl alcohol; 1 to 7 parts by weight of octyl dodecanol and 0.5 to 1.5 parts by weight of behenyl alcohol; or 1 to 7 parts by weight of octyldodecanol, 0.5 to 3 parts by weight of cetostearyl alcohol and 0.5 to 1.5 parts by weight of behenyl alcohol as fatty alcohols. In one embodiment of the present invention, it was experimentally confirmed that the oil-in-water composition included in the above range is excellent in stability, does not cause a white turbidity phenomenon, and is excellent in skin spreadability and a degree of adhesion.
Each of the above-mentioned ingredients contained in the cosmetic composition according to the present invention may preferably be contained in the cosmetic composition of the present invention within a range not exceeding the maximum usage amount specified in the technical specification for cosmetic safety, which is set forth in the government of china.
The cosmetic composition according to the present invention may also be prepared in any dosage form conventionally prepared in the art. For example, the above cosmetic composition may have the following formulation: cosmetic water such as smoothing toner or nourishing lotion, spray-type cosmetic water, lotion such as face lotion, body lotion, cream such as nourishing cream, moisturizing cream, eye cream, stick (stick), essence, cosmetic ointment, Balm (Balm), spray, gel, pack, or powder form. Further, the cosmetic composition of the present invention may be used by being contained in a foundation of sunscreen cream, makeup base, liquid type or spray type, etc., powder, makeup remover such as face cleanser, makeup remover, etc., and cosmetics or products such as cleanser, soap, bath lotion, etc., but is not limited thereto.
In one embodiment, the cosmetic composition may be an oil-in-water (O/W) cosmetic composition.
The cosmetic composition of the present invention can be used according to conventional methods of use, and the number of uses thereof can be changed according to the skin condition or preference of the user.
Furthermore, the present invention may relate to the use of a cosmetic composition for the preparation of a cosmetic product. In order to avoid repeated explanation of the use of the cosmetic composition for the preparation of cosmetics of the present invention, the above explanation of the cosmetic composition can be carried over.
The cosmetic may be a general cosmetic, a natural cosmetic, a low-irritation cosmetic or an organic cosmetic.
Further, the present invention provides a method for preparing the oil-in-water type cosmetic composition. The cosmetic composition prepared by the preparation method of the present invention has the following advantages: has excellent stability over time, and thus can improve the preparation efficiency and the storage and storage efficiency of the product. Moreover, the following advantages are provided: the white turbidity phenomenon does not occur, so that the cosmetic can meet the preference of consumers when being prepared.
The method for preparing the oil-in-water type cosmetic composition of the present invention comprises:
adding the thickening agent into the solvent and dispersing for 10 to 50 minutes;
adding a water-soluble raw material to the dispersion and heating to 50 ℃ to 100 ℃ to prepare an aqueous phase mixture;
mixing octyldodecanol or two or more fatty alcohols selected from the group consisting of octyldodecanol, cetearyl alcohol and behenyl alcohol, and a lecithin-based surfactant and heating to 50 ℃ to 100 ℃ to prepare an oil phase mixture;
adding an oil phase mixture to the above aqueous phase mixture at 50 to 100 ℃ and emulsifying for 5 to 30 minutes using a homomixer at 2000 to 4000 rpm; and
the emulsified oil phase-water phase mixture is cooled to 20 to 30 ℃ and defoamed. The oil-in-water type composition prepared according to the preparation method of the present invention has excellent stability over time, and the problem of occurrence of white turbidity is improved, and thus can be effectively used in cosmetics.
The preparation method can also comprise the following steps: adding one or more selected from the group consisting of an ultraviolet ray blocking agent, a neutralizer, a thickener, a perfume, an antioxidant, a pigment, a solvent, a humectant and a preservative to the oil phase-water phase mixture, and emulsifying at 2000 to 4000rpm for 5 to 30 minutes using a homomixer.
The solvent includes, but is not limited to, those generally used in the art of the present invention, and may be, for example, purified water, but is not limited thereto.
The water-soluble material may include a solvent and/or a humectant. The above-mentioned solvents and humectants may include, but are not limited to, those generally used in the art of the present invention.
The above oil phase mixture may be prepared by further comprising one or more selected from the group consisting of an emulsification aid, a preservative and a vegetable oil.
In the preparation step of the above oil phase mixture, the fatty alcohol and the lecithin-based surfactant may be contained in an amount of 0.1 to 10 parts by weight and 0.5 to 12 parts by weight, relative to 100 parts by weight of the total oil-in-water type cosmetic composition.
The fatty alcohols may include octyldodecanol, cetearyl alcohol and behenyl alcohol. As for the aforementioned octyldodecanol, cetylstearyl alcohol and behenyl alcohol, 1 to 7 parts by weight of octyldodecanol, 0.5 to 3 parts by weight of cetylstearyl alcohol and 0.5 to 1.5 parts by weight of behenyl alcohol may be included with respect to 100 parts by weight of the entire oil-in-water type cosmetic composition.
The oil phase mixture may be prepared by further comprising a vegetable oil, and the vegetable oil may be contained in an amount of 1 to 30 parts by weight with respect to 100 parts by weight of the entire oil-in-water type cosmetic composition.
The oil phase mixture may be prepared by further including a natural emulsification aid, and the natural emulsification aid may be included in an amount of 1 to 9 parts by weight with respect to 100 parts by weight of the entire oil-in-water type cosmetic composition.
In order to avoid repetitive description of the method for producing the oil-in-water type cosmetic composition of the present invention, the cosmetic composition and the use of the cosmetic composition can be referred to the above description.
The advantages and features of the present invention and methods for achieving them will be apparent with reference to the experimental examples and the preparation examples described in detail later. However, the present invention is not limited to the experimental examples and the preparation examples disclosed below, but may be embodied in many different forms and is provided only for the purpose of making the disclosure of the present invention complete and fully explaining the scope of the present invention to those skilled in the art to which the present invention pertains.
Effects of the invention
The cosmetic composition according to the present invention can provide a cosmetic composition of a dosage form that improves the degree of skin attachment, stability and degree of skin absorption and the white turbidity phenomenon is reduced by solving the problems of the white turbidity phenomenon and inconvenient feeling of use in the conventional natural polymer-containing composition without using a polyethylene glycol-based surfactant, a synthetic antifoaming agent such as silicone oil, etc., and thus has the following advantages: not only can the concern of consumers about harmful ingredients be eliminated by excluding synthetic raw materials, but also a natural cosmetic, a low-irritation cosmetic or an organic cosmetic improved in quality and stability to the level of ordinary cosmetic products can be provided.
Drawings
Fig. 1 is a photograph comparing degrees of white turbidity of cosmetic compositions according to an embodiment of the present invention.
Detailed Description
Hereinafter, the present invention will be described in detail by the following examples. However, the following examples are merely illustrative of the present invention, and the contents of the present invention are not limited to the following examples.
Preparation example 1 preparation of oil-in-Water type cosmetic composition
The oil-in-water type cosmetic compositions of comparative examples 1 to 4 were prepared using the compositions of table 1 below. All contents in table 1 are expressed in parts by weight, and the specific preparation method is as follows:
1. the raw material 2 (xanthan gum) was slowly put into the raw material 1 (purified water), and then dispersed with a disperser (disper) for 30 minutes, and then the raw material 3 (glycerin) and the raw material 4 (butylene glycol) were put in, and then heated to 75 ℃.
2. Oil phase: the ingredients of raw materials 5 to 7 and 13 and raw materials 8 to 12 in accordance with each composition example were mixed and then heated to 75 ℃.
3. The oil phase mixture of phase 2 was slowly dropped into the water phase mixture of phase 1 at 75 deg.C and emulsified for 10 minutes at 3000rpm using a homomixer.
4. Cooled to 50 ℃, then the feedstock 14 was charged and mixed using a homomixer at 3000rpm for 5 minutes.
5. The emulsified mixture was cooled to 30 ℃ and then defoamed.
[ Table 1]
Figure BDA0002633159100000151
Also, oil-in-water type cosmetic compositions of example 1, example 2 and comparative examples 5 to 8 were prepared with the compositions of table 2 below. All contents in table 2 are expressed in parts by weight, and the specific preparation method is as follows:
1. the raw material 2 (xanthan gum) was slowly put into the raw material 1 (purified water), and then dispersed with a disperser (disper) for 30 minutes, and the raw material 3 (glycerin) and the raw material 4 (butylene glycol) were put in, and then heated to 75 ℃.
2. Oil phase: the ingredients of raw materials 5 to 9 in accordance with each composition example and raw materials 10 to 12 were mixed and then heated to 75 ℃.
3. The oil phase mixture of phase 2 was slowly dropped into the water phase mixture of phase 1 at 75 deg.C and emulsified for 10 minutes at 3000rpm using a homomixer.
4. Cooled to 50 ℃, then raw material 13 (preservative) was charged and mixed for 5 minutes at 3000rpm using a homomixer.
5. The above-mentioned 4 th mixture was cooled to 30 ℃ and then defoamed.
[ Table 2]
Figure BDA0002633159100000161
Experimental example 1 evaluation of white turbidity
The compositions of comparative examples 1 to 4 prepared in the above preparation example 1 were evaluated for white turbidity.
Evaluation criteria
1) Visual evaluation: after preparation, the skin was rolled 10 times and then the degree of formation of white turbidity was visually evaluated
O: few, Δ: in general, X: induction, X X: very induce
2) Evaluation by a color difference meter: the skin was rolled 20 times on the skin, and then the skin brightness (lightness) was evaluated by a color difference meter (MINOLTA SPECTROPHOTOMETER CM-3700d)
[ Table 3]
Measuring wavelength intervals 10nm
Light source for measurement Pulse xenon lamp
Transmitted color measurement mode d/0 (diffuse illumination/0 degree received light)
Interface (Interface) RS-232C Standard
[ general formula 1]
Figure BDA0002633159100000162
[ Table 4]
Comparative example 1 Comparative example 2 Comparative example 3 Comparative example 4
Evaluation by naked eye (white turbidity) X X X X X X
Lightness value 3.1 2.8 5.2 6.3
As shown in table 4 above, it was confirmed that the lightness value evaluated by the colorimeter and the white turbidity value evaluated by the naked eye showed similar result values. It was confirmed that the lightness value was 2.8 or more for comparative examples 1 to 4 containing a natural emulsifier, and thus much white turbidity occurred when rolling on the skin, and particularly, for comparative examples 3 and 4, the more the rolling on the skin, the less the emulsion was absorbed and the white turbidity significantly increased.
[ Table 5]
Example 1 Example 2 Comparative example 5 Comparative example 6 Comparative example 7 Comparative example 8
Evaluation by eye X X X X X X X
Lightness value 0.32 0.80 6.1 3.2 6.5 7.2
Further, as shown in table 5 above, it was confirmed that the lightness value evaluated by the colorimeter and the white turbidity value evaluated by the naked eye showed similar result values. In comparative examples 5 to 8, a lot of white turbidity occurred when rolling on the skin, and in particular, in comparative examples 5, 7 and 8, the white turbidity increased and absorption was not good as the rolling on the skin was increased. On the other hand, the composition of example 1 including octyldodecanol, which is one of fatty alcohols, or the composition of example 2 including cetostearyl alcohol and behenyl alcohol showed a significantly lower lightness value than those of comparative examples 5 to 8, and no cloudiness phenomenon was observed by visual evaluation.
Preparation example 2 preparation of oil-in-Water type cosmetic composition
Further, oil-in-water type cosmetic compositions of examples 3 to 4 and comparative example 9 were prepared using the compositions of table 6 below. All contents of table 6 are expressed in parts by weight, and the specific preparation method is as follows:
1. the raw material 2 (xanthan gum) was slowly put into the raw material 1 (purified water), and then dispersed with a disperser (disper) for 30 minutes, and the raw material 3 (glycerin) and the raw material 4 (butylene glycol) were put in, and then heated to 75 ℃.
2. Oil phase: the ingredients in each composition example of the raw materials 9 to 11 and the raw materials 5 to 8 were mixed and then heated to 75 ℃.
3. The oil phase mixture of phase 2 was slowly dropped into the water phase mixture of phase 1 at 75 deg.C and emulsified for 10 minutes at 3000rpm using a homomixer.
4. Cooled to 50 ℃, then the raw material 12 (preservative) was charged and mixed for 5 minutes at 3000rpm using a homomixer.
5. The above-mentioned 4 th mixture was cooled to 30 ℃ and then defoamed.
[ Table 6]
Figure BDA0002633159100000181
Experimental example 2 evaluation of stability with time and degree of cloudiness of emulsion
The oil-in-water type cosmetic composition prepared in the above preparation example 2 was evaluated for stability with time and degree of white turbidity.
1) Method for evaluating stability of emulsified particles with time
The stability of the dosage forms was visually evaluated at 25 ℃, 50 ℃ and cycle on the 1 st day after the preparation and the 30 th day after the preparation. At this time, cycle (cycle) was carried out by changing the storage temperature from-15 ℃ to 45 ℃ in a cycle of 12 hours.
< evaluation criteria >
Very good: stable, X: instability of the film
The above results of stability over time and particle size are shown in table 7 below.
[ Table 7]
Figure BDA0002633159100000191
For examples 3 to 5, it was confirmed with the naked eye that immediately after preparation and even after 30 days had elapsed, stability was maintained without phase separation under all conditions. Also, it can be seen that the compositions of examples 3 to 5, even if containing natural oils, were excellent in stability at a level similar to those containing conventional silicone-based oils.
2) Evaluation of white turbidity
The oil-in-water type cosmetic composition prepared in the above preparation example 2 was evaluated for white turbidity in the same manner as the conditions described in experimental example 1.
[ Table 8]
Example 3 Example 4 Example 5 Comparative example 9
Evaluation by eye
Lightness value 0.22 0.23 0.18 0.32
As shown in table 8, it was confirmed that the lightness value evaluated by the colorimeter showed a result value similar to the cloudiness degree evaluated by naked eyes. For comparative example 9 containing polydimethylsiloxane, which was mainly used as an antifoaming agent in a general oil-in-water formulation, it could be confirmed that white turbidity hardly occurred, and the compositions of examples 3 to 5 of the present invention showed similar levels to comparative example 9 in both visual evaluation and lightness values. In particular, it was confirmed that the compositions of examples 3 to 5 have a brightness value of less than 1 even when they contain natural products, and thus it can be seen that the compositions are excellent in the degree of white turbidity when the present invention contains octyldodecanol, cetearyl alcohol and behenyl alcohol together. Further, it is found that the white turbidity-inhibiting effect is more excellent as the content of the fatty alcohol is increased. Thus, it can be seen that the composition of the present invention does not exhibit cloudiness and is rapidly absorbed at the level of a conventional formulation containing an antifoaming agent when rolled on the skin.
EXAMPLE 4 evaluation of the degree of conformity of the emulsion
The oil-in-water type cosmetic compositions of examples 3 to 5 and comparative example 9 prepared in the above preparation example 2 were evaluated for the degree of adhesion.
Evaluation criteria
1) Evaluation of elastic feeling (feeling of adhesion): evaluation of feeling of fit was performed when the skin was rolled 10 times after preparation (n is 10, and evaluation was performed for 20 to 40-over-age women)
O: good, Δ: in general, X: hardly any
2) Evaluation of the degree of adhesion: measuring the friction coefficient of skin (leather) after applying the product on the leather
[ Table 9]
Figure BDA0002633159100000201
[ Table 10]
Example 3 Example 4 Example 5 Comparative example 9
Evaluation by eye
Degree of adhesion 0.37 0.41 0.55 0.38
As shown in table 10, the degree of fit (average frictional force) showed a tendency similar to the evaluation result of the degree of fit. Further, it was confirmed that the degree of adhesion increased with an increase in the content of fatty alcohol, and the adhesion tended to be similar to the suppression of white turbidity. For the compositions of examples 3 to 5 of the present invention, an evaluation of having a silky and smooth fit was confirmed, which has a remarkably excellent fit degree compared to comparative example 9 containing polydimethylsiloxane (which is mainly used as an antifoaming agent in a general oil-in-water formulation).

Claims (19)

1. An oil-in-water cosmetic composition comprising:
lecithin-based surfactants; and
octyldodecanol or two or more fatty alcohols selected from the group consisting of octyldodecanol, cetearyl alcohol, and behenyl alcohol.
2. The oil-in-water type cosmetic composition according to claim 1, wherein the cosmetic composition contains less than 0.01% by weight of a polyethylene glycol-based surfactant and/or a silicone oil, or does not contain a polyethylene glycol-based surfactant and/or a silicone oil.
3. The oil-in-water type cosmetic composition according to claim 1, wherein the lecithin-based surfactant is contained in an amount of 0.1 to 10 parts by weight and the fatty alcohol is contained in an amount of 0.5 to 12 parts by weight, relative to 100 parts by weight of the total composition.
4. The oil-in-water type cosmetic composition according to claim 3, wherein the lecithin-based surfactant is contained in an amount of 0.1 to 5 parts by weight and the fatty alcohol is contained in an amount of 1 to 12 parts by weight, relative to 100 parts by weight of the whole oil-in-water type cosmetic composition.
5. The oil-in-water type cosmetic composition according to claim 3, wherein the fatty alcohol comprises octyldodecanol, cetearyl alcohol and behenyl alcohol.
6. The oil-in-water type cosmetic composition according to claim 5, wherein 1 to 7 parts by weight of octyldodecanol, 0.5 to 3 parts by weight of cetearyl alcohol, and 0.5 to 1.5 parts by weight of behenyl alcohol are contained, relative to 100 parts by weight of the entire oil-in-water type cosmetic composition.
7. The oil-in-water type cosmetic composition according to any one of claims 1 to 6, wherein the oil-in-water type cosmetic composition further comprises a vegetable oil.
8. The oil-in-water type cosmetic composition according to claim 7, wherein the vegetable oil is contained in an amount of 1 to 30 parts by weight relative to 100 parts by weight of the whole oil-in-water type cosmetic composition.
9. The oil-in-water type cosmetic composition according to any one of claims 1 to 6, wherein the oil-in-water type cosmetic composition further comprises one or more selected from the group consisting of natural emulsifiers and natural emulsification aids.
10. The oil-in-water type cosmetic composition according to claim 9, wherein the natural emulsification aid is contained in an amount of 1 to 9 parts by weight based on 100 parts by weight of the whole oil-in-water type cosmetic composition.
11. The oil-in-water type cosmetic composition according to any one of claims 1 to 6, wherein the lightness value of the composition, calculated according to the following general formula 1 after the lightness of the skin measured with a colorimeter, is less than 1.5,
[ general formula 1]
Figure FDA0002633159090000021
12. The oil-in-water type cosmetic composition according to any one of claims 1 to 6, wherein the cosmetic composition is in the form of a lotion, a cleanser, an oil, an emulsion, a cream, a stick, an essence, a cosmetic ointment, a balm, a spray, a gel, a mask, or a powder.
13. A method for preparing an oil-in-water type cosmetic composition, comprising:
adding the thickening agent into the solvent and dispersing for 10 to 50 minutes;
adding a water-soluble raw material to the dispersion and heating to 50 ℃ to 100 ℃ to prepare an aqueous phase mixture;
mixing octyldodecanol or two or more fatty alcohols selected from the group consisting of octyldodecanol, cetearyl alcohol, and behenyl alcohol; and a lecithin-based surfactant, and heating to 50 ℃ to 100 ℃ to prepare an oil phase mixture;
adding an oil phase mixture to the above aqueous phase mixture at 50 to 100 ℃ and emulsifying for 5 to 30 minutes using a homomixer at 2000 to 4000 rpm; and
the emulsified oil phase-water phase mixture is cooled to 20 to 30 ℃ and defoamed.
14. The method for producing an oil-in-water type cosmetic composition according to claim 13, wherein the oil phase mixture is produced by the step of containing 0.1 to 10 parts by weight of the lecithin-based surfactant and 0.5 to 12 parts by weight of the fatty alcohol based on 100 parts by weight of the whole oil-in-water type cosmetic composition.
15. The method for preparing an oil-in-water type cosmetic composition according to claim 13, wherein the fatty alcohol comprises octyldodecanol, cetearyl alcohol and behenyl alcohol.
16. The method for preparing the oil-in-water type cosmetic composition according to any one of claims 13 to 15, wherein 1 to 7 parts by weight of octyldodecanol, 0.5 to 3 parts by weight of cetearyl alcohol, and 0.5 to 1.5 parts by weight of behenyl alcohol are contained, relative to 100 parts by weight of the entire oil-in-water type cosmetic composition.
17. The method for preparing an oil-in-water type cosmetic composition according to any one of claims 13 to 16, wherein the step of preparing the oil phase mixture is carried out while further comprising 1 to 30 parts by weight of a vegetable oil with respect to 100 parts by weight of the whole oil-in-water type cosmetic composition.
18. The method for preparing an oil-in-water type cosmetic composition according to any one of claims 13 to 17, wherein the step of preparing the oil phase mixture is performed while further comprising 1 to 9 parts by weight of a natural emulsification aid with respect to 100 parts by weight of the entire oil-in-water type cosmetic composition.
19. The method for producing an oil-in-water type cosmetic composition according to any one of claims 13 to 18, wherein the cosmetic composition contains less than 0.01% by weight of a polyethylene glycol-based surfactant and/or a silicone oil, or does not contain a polyethylene glycol-based surfactant and/or a silicone oil.
CN202010817226.6A 2020-08-14 2020-08-14 Oil-in-water type cosmetic composition free from cloudiness Pending CN114073643A (en)

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