CN114073648A

CN114073648A - Cosmetic composition comprising natural polymers

Info

Publication number: CN114073648A
Application number: CN202010841066.9A
Authority: CN
Inventors: 郑舒希; 金文周; 申爀峻
Original assignee: LG Household and Health Care Ltd
Current assignee: LG H&H Co Ltd
Priority date: 2020-08-20
Filing date: 2020-08-20
Publication date: 2022-02-22

Abstract

Cosmetic compositions comprising natural polymers. The oil-in-water type cosmetic composition according to the present invention uses a natural polymer instead of a synthetic polymer containing a polyethylene glycol-based surfactant, and simultaneously contains a fatty alcohol, a lecithin-based surfactant, and an anionic-based surfactant in the composition, so that it is possible to provide a cosmetic composition which has less change in viscosity and particle size with the lapse of time, does not precipitate at high and low temperatures, and is excellent in emulsion stability.

Description

Cosmetic composition comprising natural polymers

Technical Field

The present invention relates to an oil-in-water type cosmetic composition which minimizes the use of polyethylene glycol surfactants and synthetic polymers, while showing little change in viscosity and particle size with the lapse of time, and is excellent in dosage form stability.

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 in the synthesis of polyethylene glycol surfactants, are limited to carcinogens, 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.

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 a negative recognition not only for products containing raw materials known to be harmful to the human body (e.g., polyethylene glycol-based surfactants, paraben-based preservatives) but also for products containing synthetic raw materials (e.g., synthetic polymers). Therefore, it is a fact that interest in natural cosmetics or organic cosmetics that do not use polyethylene glycol-based surfactants and synthetic polymers is increasing.

However, hitherto, emulsions not containing a polyethylene glycol-based surfactant and a synthetic polymer have poor stability and quality as compared with ordinary emulsions using a polyethylene glycol-based surfactant or a synthetic ingredient such as a synthetic polymer freely. This is a phenomenon that synthetic polymers contributing to the stability of the dosage form and the formation of viscosity cannot be used, and polyethylene glycol-based surfactants, which control the stability even in a small amount, cannot be used. Natural polymers have poor viscosity forming ability compared to synthetic polymers, and thus are used in increased amounts, and it is difficult to form a desired viscosity using only natural polymers, and thus more fatty alcohol, natural wax, etc. must be used compared to ordinary emulsions.

When an excess of fatty alcohol and natural wax is used to ensure viscosity formation and stability of a cosmetic composition containing no polyethylene glycol surfactant and synthetic polymer, problems of an increasing viscosity, a problem of precipitation at low temperature, and an insufficient flow stability at high temperature occur with the lapse of time.

Also, if a surfactant of lecithin series is included in the composition as described above, even if relatively less fatty alcohol or natural wax is used, there is a tendency that the initial viscosity increases and the stability is improved, but there is still a problem that the viscosity increases with the lapse of time.

The phenomenon of increasing viscosity over time is directly related to the overall quality of the product (e.g., quality management due to changes in initial and later use sensations, problems with residual contents in containers, etc.), and it is therefore necessary to solve these problems.

Disclosure of Invention

Problems to be solved by the invention

The present inventors have conducted studies to ensure the viscosity and stability of cosmetic compositions that minimize the use of polyethylene glycol surfactants and synthetic polymers, and as a result, have confirmed that if an anionic surfactant is further included along with a fatty alcohol and a lecithin surfactant, the problem of the stability and viscosity increase of the composition is improved, thereby completing the present invention.

Accordingly, an object of the present invention is to provide an oil-in-water type cosmetic composition that minimizes the use of polyethylene glycol-based surfactants and synthetic polymers, that is, that has less change in particle size over time, that is, excellent emulsion stability at high/low temperatures, and that has less change in viscosity over time, even when containing fatty alcohols, lecithin-based surfactants, and anionic-based surfactants.

Means for solving the problems

As a means for solving the above problems, the present invention provides a cosmetic composition comprising

Fatty alcohol, lecithin surfactants, and anionic surfactants.

Further, the present invention provides a method for preparing a cosmetic composition, comprising the step of mixing a fatty alcohol, a lecithin-based surfactant, and an anionic surfactant.

Hereinafter, the constitution of the present invention will be described in detail.

The cosmetic composition of the present invention comprises a fatty alcohol, a lecithin-based surfactant, and an anionic-based surfactant.

In the present invention, the above-mentioned fatty alcohol may be a chain or branched fatty alcohol of C6 to C22. For example, the fatty alcohol may be one or more selected from the group consisting of arachidyl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, cetostearyl alcohol, behenyl alcohol, cetearyl alcohol, oleyl alcohol, and derivatives thereof, but is not limited thereto. In the present invention, the above-mentioned fatty alcohol may be contained for viscosity formation and dosage form stability of the composition.

In one embodiment, the fatty alcohol can be arachidyl alcohol, cetearyl alcohol, and behenyl alcohol.

In the present invention, the above-mentioned fatty alcohol may be contained in an amount of 0.5 to 10 parts by weight, for example, 0.5 to 8 parts by weight, 0.5 to 5 parts by weight, 0.3 to 3 parts by weight, 0.3 to 5 parts by weight, 1 to 8 parts by weight, 1.5 to 6 parts by weight, 2 to 4 parts by weight, 2.5 to 3.5 parts by weight, 3.2 to 8 parts by weight, based on 100 parts by weight of the total cosmetic composition.

In the present invention, the lecithin-based surfactant may be selected from the group consisting of lecithin, hydrogenated lecithin, soybean lecithin, hydrogenated lecithin/C12-16 alcohol/palmitic acid, lysolecithin, hydrogenated phosphatidylcholine, and hydrogenated phospholipid, but is not limited thereto. In the present invention, the above-mentioned lecithin-based surfactant may be included for increasing the initial viscosity of the composition and maintaining the formulation stability.

In one embodiment, the lecithin-based surfactant may be hydrogenated lecithin.

The above lecithin-based surfactant may be contained in an amount of 0.001 to 2 parts by weight, for example, 0.1 to 2 parts by weight, 0.005 to 1.8 parts by weight, 0.01 to 1.5 parts by weight, 0.05 to 1.3 parts by weight, 0.1 to 1 part by weight, 0.3 to 0.8 parts by weight, 0.4 to 0.6 parts by weight, 1 to 2 parts by weight, based on 100 parts by weight of the total cosmetic composition. When the content of the above lecithin-based surfactant exceeds 2 parts by weight, the change in viscosity with the lapse of time is large, so that the composition may be unstable.

In the present invention, the anionic surfactant may be selected from the group consisting of glutamate-based surfactants, sulfate-based surfactants, sulfonate-based surfactants, and phosphate-based surfactants. For example, the anionic surfactant of the present invention may be selected from the group consisting of alkyl sulfonates, alkylbenzene sulfonates, olefin alkylsulfonates, alkyl ether sulfonates, glycerol ether sulfonates, methyl ester sulfonates, sulfofatty acids, alkyl sulfates, fatty alcohol ether sulfates, glycerol ether sulfates, fatty acid ether sulfates, hydroxy mixed ether sulfates, monoglyceride (ether) sulfates, fatty acid amide (ether) sulfates, mono-and dialkyl sulfosuccinates, mono-and dialkyl sulfosuccinamates, sulfotriglycerides, amide soaps, ether carboxylic acids and salts thereof, fatty acid isethionates, fatty acid sarcosinates, fatty acid taurates, N-acyl amino acids (e.g., acyl lactylates, acyl tartrates, acyl glutamates and acyl aspartates), alkyl oligoglucoside sulfates, fatty acid ester, and ester, alkyl glucose carboxylates, protein fat condensates, and alkyl (ether) phosphates, but are not limited thereto. The alkyl and/or acyl chain length of the above anionic surfactant may be 8 to 22 carbon atoms, preferably 10 to 16 carbon atoms.

In one embodiment, the anionic surfactant may be selected from the group consisting of sodium stearyl glutamate, sodium lauroyl glutamate, sodium myristoyl glutamate, sodium cetyl sulfate, sodium laureth sulfate, and sodium lauryl sulfate, but is not limited thereto.

In other embodiments, the anionic surfactant may be sodium stearyl glutamate, sodium lauroyl glutamate, or sodium cetyl sulfate.

The content of the above anionic surfactant may be 0.001 to 0.15 parts by weight, for example, 0.005 to 0.13 parts by weight, 0.01 to 0.1 parts by weight, 0.03 to 0.08 parts by weight, 0.04 to 0.06 parts by weight, based on 100 parts by weight of the total cosmetic composition. When the content of the anionic surfactant exceeds 0.15 parts by weight, although a tendency of improving stability is shown by increasing the initial viscosity immediately after the preparation of the composition, a problem of lowering the viscosity with the lapse of time may occur.

In the present invention, the above-mentioned lecithin-based surfactant and anionic-based surfactant may be present in a content ratio of 1:0.0001 to 1:0.25, for example, in a content ratio of 1:0.001 to 1:0.2, in a content ratio of 1:0.0001 to 1:0.1, in a content ratio of 1:0.0001 to 1:0.05, in a content ratio of 1:0.0001 to 1:0.02, in a content ratio of 1:0.0001 to 1:0.01, in a content ratio of 1:0.0001 to 1:0.005, in a content ratio of 1:0.0001 to 1:0.002, in a content ratio of 1:0.0002 to 1:0.25, in a content ratio of 1:0.0002 to 1:0.2, in a content ratio of 1:0.0002 to 1:0.1, in a content ratio of 1:0.0002 to 1:0.05, in a content ratio of 1:0.2 to 1:0.02, in a content ratio of 1:0.001 to 1: 0.001: 0.1: 0, in a content ratio of 1:0.001 to 1: 0.1: 0, in a content ratio of 1:0.0001 to 1: 0.0.1: 0.1, in a content ratio of 1: 0.0.0.0.0.0.0.0.1: 0.1, in a content ratio of 1: 0.0.1: 0.1, in a content ratio of 1:0.001 to 1: 0.1: 0.1.1, in a content ratio of 1: 0.1: 0.1.1: 0.1: 0.1.1: 0.1, in a content ratio of 1: 0.1: 0.0.1, in a content ratio of 1:0.1, in a content ratio of 1: 0.0.0.0.1: 0.1, in a content ratio of 1.1.1.0.0.1: 0.1 to 1, in a content ratio of 1: 0.1: 0.0.0.1: 0.1, in a content ratio of 1.0.0.0.0.1.1: 0.0.1: 0.1: 0.1.0.0.1.1: 0.1, in a content ratio of 1: 0.1: 0.1.1: 0.0.1: 0.1.1.1, in a content ratio of 1.0001 to 1: 0.0.1.0.1.1.1.1.1.1.0.1.1.1, in a content ratio of 1.1.1: 0.0.1.1.1, in a content ratio of 1.0.0.0.0.0.0.0.1, A content ratio of 1:0.001 to 1:0.05, a content ratio of 1:0.001 to 1:0.02, a content ratio of 1:0.001 to 1:0.01, a content ratio of 1:0.001 to 1:0.005, a content ratio of 1:0.001 to 1:0.002, a content ratio of 1:0.002 to 1:0.25, a content ratio of 1:0.002 to 1:0.2, a content ratio of 1:0.002 to 1:0.1, a content ratio of 1:0.002 to 1:0.05, a content ratio of 1:0.002 to 1:0.02, a content ratio of 1:0.002 to 1:0.01, a content ratio of 1:0.002 to 1:0.005, a content ratio of 1:0.02 to 1:0.25, a content ratio of 1:0.02 to 1:0.2, a content ratio of 1:0.02 to 1:0.1, a content ratio of 1:0.02 to 1:0.05, a content ratio of 1:0.1 to 1:0.25, a content ratio of 1:0.1 to 1:0.2, a content ratio of 1:0.05 to 1:0.005, a content ratio of 1:0.01 to 1:0.1, a content ratio of 1:0.01 to 1:0.2, a content ratio of 1:0.01 to 1: 0.25. When the lecithin-based surfactant and the anionic-based surfactant are included in the composition at the above content ratio, the stability at low and high temperatures is improved, and the viscosity increase phenomenon with the passage of time and the change in the particle size of the emulsion can be reduced.

The cosmetic composition according to the present invention is characterized in that it substantially does not contain synthetic polymers such as polyethylene glycol-based compounds, polyacrylate-based compounds, and polyamide-based compounds. In the present invention, substantially not containing means that the content of the above synthetic polymer can be minimized or that the synthetic polymer can be not contained at all, and means that the content is 1 part by weight or less, preferably 0.1 part by weight or less, more preferably 0.01 part by weight or less, based on 100 parts by weight of the entire composition.

The above polyethylene glycol compound may be 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 or PEG-30 dipolyhydroxystearate, but is not limited thereto.

Further, as the above polyacrylate compound, carbomer, acrylate/C10-30 alkanol acrylate crosspolymer, acryloyldimethyltaurate/VP copolymer, hydroxyethyl acrylate/acryloyldimethyltaurate copolymer, polyacrylate-13, sodium polyacrylate or VP/dimethylaminoethyl methacrylate copolymer may be mentioned, but not limited thereto.

The polyamide-based compound may be, but is not limited to, polyacrylamide, ethylenediamine/stearyl alcohol dilinoleate copolymer I, polyamide-3, polyamide-4, polyamide-5, polyamide-6, polyamide-8, acrylate/octylacrylamide copolymer, bis-stearyl ethylenediamine/neopentyl glycol/stearyl alcohol hydrogenated dilinoleate copolymer, ethylenediamine/hydrogenated dilinoleate copolymer bis-Di-C14-18 alkylamide, VP/methacrylamide/vinylimidazole copolymer or acrylate/octylacrylamide copolymer.

In the present invention, the synthetic polymer means not only the polyethylene glycol-based compound, the polyacrylate-based compound, and the polyamide-based compound, but also a raw material that is chemically synthesized, rather than a natural source, among polymer raw materials used for applications such as a thickener, a viscosity modifier, or a film-forming agent.

In the present invention, the above cosmetic composition minimizes the use of a synthetic polymer containing a polyethylene glycol-based surfactant, and uses a natural polymer as a natural additive instead of the above synthetic polymer, so that the consumer's concern about harmful components possessed by the polyethylene glycol-based surfactant and the synthetic polymer can be reduced. Further, in order to improve problems such as a decrease in viscosity-forming ability of natural polymers, there have been problems in that fatty alcohols and lecithin-based surfactants are contained in an excessive amount in cosmetic compositions, and there are still problems in that the viscosity changes with the passage of time and the stability of the compositions at high/low temperatures. However, the cosmetic composition according to the present invention includes an anionic surfactant in addition to an excessive amount of fatty alcohol and lecithin-based surfactant, so that the viscosity change and the emulsion particle size change with the passage of time are small, and the composition can be stably present even at high and low temperatures. In the present invention, the natural additives are components such as organic materials, plant and plant-derived materials, animal and animal-derived materials, minerals and mineral-derived materials, and water. For example, the additive may be one or more additives selected from the group consisting of a thickener, a viscosity modifier, and a film forming agent, and may be selected from the group consisting of microcrystalline cellulose, cellulose gum, sclerotium rolfsii gum, xanthan gum, gum arabic, gellan gum, rhizobium gum, carrageenan, and sodium hyaluronate, but is not limited thereto.

The above natural additive may be contained in an amount of 0.01 to 3 parts by weight, for example, 0.05 to 2 parts by weight, 0.1 to 1 part by weight, based on 100 parts by weight of the entire composition.

In the present invention, the above-mentioned natural additives mean those obtained from natural or nature, or simply modified from natural or nature-derived components, or those synthesized from natural-derived components, and mean that chemically synthesized components (components not of natural origin) synthesized by artificial methods are excluded.

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 above-mentioned environmental certification standards, which are compositions consisting of components excluding synthetic processes and being environmentally cultivated and processed, include ecoert (ecoert), cosmos (cosmos) in europe, usda (us Department of agency) in the united states, bdih (Association of germany Industries and Trading firms) in germany, jas (japan Association of standard) in japan, and the like, and meet the consumer demand of the recent preference for environmental products, and environmental certification systems for safety certification of components or products are being widely developed in various countries. Although countries show dissimilarities in detailed numerical values, ranges, and the like, the primary constituents of raw materials and components show global uniformity in the scope of environmental certification in 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 specifications are certified by ecosert, Cosmos, USDA, or the like.

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.

As described above, the cosmetic composition according to the present invention minimizes the use of synthetic polymers by including fatty alcohol, lecithin-based surfactant, and anionic-based surfactant, so that it is possible to stabilize the change in viscosity with the passage of time and the change in size of emulsion particles with the passage of time. In the present invention, "stabilization of viscosity change with the lapse of time" means that the viscosity after 4 weeks from the preparation of the composition exists in the range of 90 to 140% of the initial viscosity of the composition (viscosity immediately after the preparation). Also, "stabilization of emulsion particle size change with the lapse of time" means that the emulsion particle size after 4 weeks from the preparation of the composition exists in the range of 75 to 120% of the initial emulsion particle size of the composition.

In the following examples, the results of confirming the change in viscosity and the change in the emulsion particle size over time and the stability at various temperatures by preparing an oil-in-water type cosmetic composition comprising an appropriate amount of a lecithin-based surfactant and an anionic-based surfactant confirm that the change in viscosity and the change in the emulsion particle size over time are small and can be maintained stable without separation and precipitation of the composition even when stored at various temperatures.

The cosmetic composition according to the present invention may further comprise purified water and an oil phase component.

The oil phase component may include one or more of an oil or a wax. The above oils and waxes may be used as all those conventionally used in the art as ingredients of cosmetics. 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 ester oils, ascorbyl palmitate, ascorbyl linoleate, ascorbyl stearate, diisostearyl malate, benzyl benzoate, benzyl laurate, butanediol dicaprylate/dicaprate, butanediol diisononanoate, butanediol laurate, butanediol stearate, butyl isostearate, cetearyl isononanoate, cetearyl nonanoate, cetyl octanoate, cetyl ethylhexanoate, cetyl isononanoate, ethylhexanol octanoate/decanoate, ethylhexyl isononanoate, ethylhexyl isostearate, ethylhexyl laurate, hexyl laurate, octyldodecyl isostearate, isopropyl isostearate, isostearyl isononanoate, isostearyl isostearate, isocetyl ethylhexanoate, neopentyl glycol dicaprate, diethyl hexanoate, neopentyl glycol dicaprate, and mixtures thereof, Neopentyl glycol diisononanoate, neopentyl glycol diisostearate, pentaerythritol stearate, pentaerythritol tetraethylhexanoate, dipentaerythritol hexa-stearate, polyglycerol-2 diisostearate, polyglycerol-2 sesquiisostearate, polyglycerol-2 isostearate, polyglycerol-2 tetraisostearate, polyglycerol-2 triisostearate, polyglycerol-3 diisostearate, polyglycerol-3 isostearate, polyglycerol-4 diisostearate, polyglycerol-4 isostearate, polyglycerol-6 diisostearate, polyglycerol-6 sesquiisostearate or triisooctanoic acid glyceride.

As the triglyceride oils, triglyceride C8-C12, triglyceride C12-C18, caprylic/capric/triglyceride, caprylic/capric/lauric triglyceride, triglyceride C10-C40 isoalkanoic acid, triglyceride C10-C18, glyceryl triacetyl hydroxystearate, soybean glyceride, behenyl trisaccharide, tridecanol, triisocaprylic glyceride, triheptanol, triisostearin, tripalmitin or tristearin can be used.

As the hydrocarbon oil, flowing paraffin (liquid paraffin, mineral oil), paraffin, vaseline, microcrystalline wax, or squalene can be used.

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.

As the wax, any of hydrocarbon waxes, vegetable waxes, silicone waxes, and the like generally used in cosmetics can be used. For example, 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, or polyethylene wax may be included, but not limited thereto.

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, anionic-based surfactant, purified water, and natural polymer. In the present invention, the content of the above oil phase component may be 1 to 20 parts by weight, for example, 3 to 15 parts by weight, 5 to 10 parts by weight, based on 100 parts by weight of the total cosmetic composition.

In one embodiment, the oil phase component can be a natural oil and/or a natural wax.

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.

The above-mentioned ingredients contained in the cosmetic composition according to the present invention are each preferably contained in the cosmetic composition of the present invention within a range not exceeding the maximum usage amount specified in "cosmetic safety & technical code" set by 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: a lotion such as a skin softening lotion or a nourishing lotion, a spray-type lotion, a lotion such as a face lotion, a body lotion, a cream such as a nourishing cream, a moisturizing cream, an eye cream, a stick, essence, a makeup ointment, a spray, a gel, a mask, a sunscreen cream, a makeup base cream, a liquid-type or spray-type foundation, a powder, a makeup remover such as a face wash, a makeup remover oil, a cleanser such as a face wash, a soap, a shower gel, or the like, 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. The cosmetic composition for preparing cosmetics of the present invention can be used as described above.

The cosmetic may be a general cosmetic, a natural cosmetic, a low-irritation cosmetic or an organic cosmetic.

Further, the method for producing the cosmetic composition of the present invention comprises the step of mixing a fatty alcohol, a lecithin-based surfactant, and an anionic surfactant.

The fatty alcohol, lecithin surfactant and anionic surfactant can be mentioned in the above-mentioned cosmetic preparations.

Specifically, the method for preparing the cosmetic composition of the present invention comprises: putting a natural additive into purified water and dispersing for 10 to 50 minutes to prepare a dispersion;

adding an anionic surfactant to the dispersion and heating to 50 ℃ to 100 ℃ to prepare an aqueous phase mixture;

mixing the oil with a fatty alcohol and a lecithin-based surfactant and heating to 50 ℃ to 100 ℃ to prepare an oil phase mixture;

adding the oil phase mixture to the above aqueous phase mixture at 50 to 100 ℃ and emulsifying for 5 to 15 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. In addition, the method comprises the following steps: in the above-mentioned aqueous phase mixture preparation step, the content of the anionic surfactant is 0.001 to 0.15 parts by weight with respect to 100 parts by weight of the total cosmetic composition.

The cosmetic composition prepared according to the preparation method of the present invention may exhibit excellent emulsion stability and the composition may not be precipitated at high/low temperatures while the viscosity change and the particle size change with the passage of time are small, while using a natural polymer instead of a synthetic polymer.

The above preparation method may further comprise: adding one or more selected from the group consisting of an ultraviolet ray blocking agent, a neutralizing agent, 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 above-mentioned natural additives are not limited to ingredients used as water-soluble ingredients generally used in the technical field to which the present invention pertains but may include all ingredients.

The 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 (natural oil).

For the method for producing the cosmetic composition of the present invention, the above-described descriptions of the cosmetic composition and the use of the cosmetic composition can be applied and approved as they are in order to avoid repetitive descriptions.

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 thorough disclosure of the present invention and to fully explain the scope of the present invention to those skilled in the art to which the present invention pertains.

Effects of the invention

The oil-in-water type cosmetic composition according to the present invention uses a natural polymer instead of a synthetic polymer containing a polyethylene glycol-based surfactant, while containing a fatty alcohol, a lecithin-based surfactant, and an anionic-based surfactant together in the composition, so that it is possible to provide a cosmetic composition that is less in change in viscosity and change in particle size with the lapse of time, while being free from precipitation of the composition at high/low temperatures, and is excellent in emulsion stability. Therefore, the cosmetic composition of the present invention has the following advantages: the quality can be improved by improving the stability of products excluding polyethylene glycol-based materials and synthetic materials due to concerns about harmful ingredients, and the same quality and stability as those of ordinary products can be provided by improving the quality and stability of natural cosmetics, low-irritation cosmetics, or organic cosmetics that cannot use polyethylene glycol-based surfactants and synthetic polymers.

Drawings

Fig. 1 is a graph showing the change in viscosity over time of the cosmetic composition according to 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

Oil-in-water type cosmetic compositions were prepared using the compositions of tables 1 and 2 below. The preparation method comprises the following steps:

1. materials 2 and 3 (natural polymers) were slowly dosed into material 1 (purified water) and then dispersed with a mixer (disper) for 30 minutes (aqueous phase). At this time, the above natural polymer in 1. may include all water-soluble ingredients that can be used in cosmetics.

2. Raw material 4 (anionic surfactant) was put into the aqueous phase, and then heated to 75 ℃.

3. Raw material 5 (lecithin surfactant) and 6 (fatty alcohol) were put together into raw material 7 (natural oil), and then heated to 75 ℃ (oil phase).

4. The mixture of 1. was put into the mixture of 2. at 75 ℃ and mixed for 5 minutes at 3500rpm using a homomixer.

5. The mixture of 3 was put into the mixture of 4 at 75 deg.c and emulsified for 7 minutes at 3500rpm using a homomixer.

6. The emulsified mixture was cooled to 30 ℃ and then defoamed.

[ Table 1]

[ Table 2]

Experimental example 1 evaluation of stability with time and viscosity of emulsion according to contents of lecithin and anionic surfactant

The viscosity and stability over time of the oil-in-water type cosmetic composition prepared in the above preparation example 1 were evaluated.

1) Evaluation of viscosity with time

For the change in viscosity from immediately after preparation to the 4 th week after preparation, the viscosity value (unit: cps) was measured at 25 ℃ after rotating at 30rpm for 60 seconds by means of a Bohler fly viscometer (DV-III Ultra Rheometer) model RVT using spindle number 4 (#4 spindle).

2) Evaluation of stability

The stability of the composition from immediately after the preparation to the 4 th week after the preparation was visually evaluated under the conditions of high temperature (50 ℃), low temperature (0 ℃), F/T (Freeze-and-thaw), and cycle at 25 ℃. At this time, the F/T test was performed by a method of freezing at-20 ℃ and completely freezing, and then standing and melting at room temperature, and the cycle was performed by changing the chamber temperature to-15 ℃, 5 ℃, 25 ℃ and 45 ℃ every 6 hours, and repeating the cycle.

< evaluation criteria >

Very good: stable (good noodle, no separation, no precipitation)

And (delta): unstable (abnormal surface state although not completely separated and precipitated)

X: separation or precipitation

In the above evaluation criteria, precipitation means that fatty alcohol, wax, or the like existing in a solid state at room temperature is stabilized to be in an emulsion state, but precipitates again in a solid state with separation or instability.

3) Measurement of particle size

For the size of the emulsion particles, the diameter (unit: nm) was measured by a particle size analyzer (Mastersizer 2000).

The above results of viscosity, stability and particle size with the lapse of time are shown in the following tables 3 and 4, and fig. 1 is a graph showing the change of viscosity with the lapse of time.

[ Table 3]

[ Table 4]

Results confirming viscosity, stability and particle size over time,

in comparative example 1, it was confirmed that the stability at low and high temperatures was not good after 4 weeks, and that the viscosity was increased with the lapse of time. For the viscosity increase of the composition of comparative example 1, the 8 th week after preparation was observed. In comparative example 2 in which a lecithin-based surfactant was further added to the composition of comparative example 1, it was confirmed that the viscosity and stability of the composition improved as the lecithin-based surfactant was added, and the viscosity increased with the passage of time decreased, but the viscosity increased with the passage of time. For comparative example 3 containing the anionic surfactant in excess in the composition of comparative example 2, it can be confirmed that the initial viscosity increased and the low-temperature stability seemed to be improved, but the viscosity also decreased with the lapse of time. In contrast, with examples 1 to 4 in which appropriate amounts of lecithin-based surfactant and anionic-based surfactant were added, it was confirmed that the stability at low and high temperatures was improved, and the viscosity increase phenomenon and the emulsion particle size change with the passage of time were improved.

Preparation example 2 preparation of oil-in-Water type cosmetic composition

An oil-in-water type cosmetic composition was prepared in the same manner as in preparation example 1, except that the composition of table 5 below was used.

[ Table 5]

Experimental example 2 evaluation of stability with time and viscosity of emulsion according to the kind of anionic surfactant

The viscosity and stability over time of the oil-in-water type cosmetic composition prepared in the above preparation example 2 were evaluated.

1) Evaluation of viscosity with time

For the change in viscosity from immediately after preparation to the 4 th week after preparation, the viscosity value (unit: cps) was measured while rotating at 30rpm by a Bohler fly viscometer (DV-III Ultra Rheometer) model RVT using a spindle No. 4 (#4spindle) at 25 ℃.

2) Evaluation of stability

The stability of the composition from just after the preparation to the 4 th week after the preparation was evaluated visually under the conditions of high temperature (50 ℃), low temperature, F/T (Freeze-and-thaw), and circulation at 25 ℃. For the stability, it was carried out by visual observation, and confirmed by a planar state (whether the surface was smooth or uneven) and a separated and precipitated state. At this time, the F/T test was carried out by a method of freezing at-20 ℃ and completely freezing, and then standing at room temperature and melting, and the cycle was carried out by a method of changing the storage temperature from-15 ℃ to 40 ℃ over a period of two days.

< evaluation criteria >

Very good: stable (good noodle, no separation, no precipitation)

X: separation or precipitation

3) Measurement of particle size

The results in terms of viscosity, stability and particle size over time are shown in table 6 below.

[ Table 6]

As a result of confirming the viscosity, stability and particle size of the cosmetic composition according to the kind of the anionic surfactant, it was confirmed that the stability and viscosity at low temperature and high temperature and the stability of particle size showed similar tendency although there was a difference in viscosity according to the kind and chain length of the anionic surfactant.

Claims

1. A cosmetic composition comprising a fatty alcohol, a lecithin-based surfactant and an anionic surfactant, wherein the anionic surfactant is contained in an amount of 0.001 to 0.15 parts by weight based on the total weight of the cosmetic composition.

2. The cosmetic composition according to claim 1, wherein the fatty alcohol is one or more selected from the group consisting of arachidyl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, cetostearyl alcohol, behenyl alcohol, cetearyl alcohol, oleyl alcohol, and derivatives thereof.

3. The cosmetic composition according to claim 1, wherein the lecithin-based surfactant is selected from the group consisting of lecithin, hydrogenated lecithin, soybean lecithin, hydrogenated lecithin/C12-16 alcohol/palmitic acid, lysolecithin, hydrogenated phosphatidylcholine, and hydrogenated phospholipid.

4. The cosmetic composition according to claim 3, wherein the lecithin-based surfactant is hydrogenated lecithin.

5. The cosmetic composition according to claim 1, wherein the lecithin-based surfactant is contained in an amount of 0.001 to 2 parts by weight, based on the whole cosmetic composition.

6. The cosmetic composition according to claim 1, wherein the anionic surfactant is selected from the group consisting of glutamate anionic surfactants, sulfate anionic surfactants, sulfonate anionic surfactants and phosphate anionic surfactants.

7. The cosmetic composition according to claim 1, wherein the content of the fatty alcohol is 0.5 to 10 parts by weight based on the total cosmetic composition.

8. The cosmetic composition according to claim 1, wherein the content ratio of the lecithin-based surfactant to the anionic-based surfactant is 1:0.0001 to 1: 0.25.

9. The cosmetic composition according to claim 1, wherein the cosmetic composition does not contain a polyethylene glycol-based compound, a polyacrylate-based compound, and a polyamide-based compound, or contains 1 part by weight or less based on 100 parts by weight of the total cosmetic composition.

10. The cosmetic composition according to claim 1, further comprising one or more natural additives selected from the group consisting of thickeners, viscosity modifiers, and film formers.

11. The cosmetic composition according to claim 10, wherein said natural additive is selected from the group consisting of microcrystalline cellulose, cellulose gum, sclerotium rolfsii gum, xanthan gum, gum arabic, gellan gum, rhizobium gum, carrageenan gum, and sodium hyaluronate.

12. A method of preparing a cosmetic composition comprising:

putting a natural additive into purified water and dispersing for 10 to 50 minutes to prepare a dispersion;

cooling the emulsified oil phase-water phase mixture to 20-30 ℃ and defoaming,

in the above-mentioned aqueous phase mixture preparation step, the content of the anionic surfactant is 0.001 to 0.15 parts by weight with respect to 100 parts by weight of the total cosmetic composition.

13. The method for preparing a cosmetic composition according to claim 12, wherein the fatty alcohol is one or more selected from the group consisting of arachidyl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, cetostearyl alcohol, behenyl alcohol, cetearyl alcohol, oleyl alcohol, and derivatives thereof.

14. The method for preparing a cosmetic composition according to claim 12, wherein the lecithin-based surfactant is selected from the group consisting of lecithin, hydrogenated lecithin, soybean lecithin, hydrogenated lecithin/C12-16 alcohol/palmitic acid, lysolecithin, hydrogenated phosphatidylcholine, and hydrogenated phospholipid.

15. The method for preparing a cosmetic composition according to claim 12, wherein the anionic surfactant is selected from the group consisting of glutamate-based anionic surfactants, sulfate-based anionic surfactants, sulfonate-based anionic surfactants and phosphate-based anionic surfactants.

16. The method for producing a cosmetic composition according to claim 12, wherein the content ratio of the lecithin-based surfactant to the anionic-based surfactant is 1:0.0001 to 1: 0.25.

17. The method for preparing a cosmetic composition according to claim 12, wherein the cosmetic composition does not contain the polyethylene glycol-based compound, the polyacrylate-based compound, and the polyamide-based compound, or contains 1 part by weight or less based on 100 parts by weight of the total cosmetic composition.

18. The method for preparing a cosmetic composition according to claim 12, wherein the natural additive is selected from the group consisting of microcrystalline cellulose, cellulose gum, sclerotium rolfsii gum, xanthan gum, gum arabic, gellan gum, rhizobia gum, carrageenan, and sodium hyaluronate.