KR20220036328A - Method of cosmetic composition containing non-aqueous dispersion, and cosmetic composition prepared by the same - Google Patents

Abstract

The present invention relates to a) a non-polar hydrocarbon oil, b) an oily component having a melting point of 30 to 95°C; and c) a method for producing a cosmetic composition containing a non-aqueous dispersion containing a copolymer of a hydrophilic monomer and a hydrophobic monomer, wherein c) adding a non-aqueous dispersion containing a copolymer of a hydrophilic monomer and a hydrophobic monomer. Before b) warming the oily component having a melting point of 30 to 95°C is included. The cosmetic composition obtained through the above manufacturing method enables even dispersion of the added ingredients.

Description

Method for producing a cosmetic composition containing a non-aqueous dispersion and a cosmetic composition prepared by the method {Method of cosmetic composition containing non-aqueous dispersion, and cosmetic composition prepared by the same}

The present invention relates to a method for producing a cosmetic composition containing a non-aqueous dispersion and a cosmetic composition produced by the above method. More specifically, a method for producing a cosmetic composition containing a homogenized non-aqueous dispersion and a cosmetic composition produced by the above method. It's about.

Anhydrous or W/O formulation mascara has the advantage of excellent waterproof effect and curl durability, but has the disadvantage that it cannot be cleansed with lukewarm water and must be cleaned with a remover to remove makeup. Various methods are being attempted to overcome this, and representative methods include adding a surfactant with a high HLB or adding a polymer compound that is easily wetted by water. Adding a surfactant with a high HLB may provide some help in cleaning, but it is fundamentally difficult to clean with only lukewarm water. When a polymer compound that wets water is added, cleansing is relatively easy, but there is a disadvantage that the waterproof effect may be insufficient. To solve these shortcomings, mascara that allows lukewarm water cleansing by using a mixture of hydrophilic and hydrophobic monomers is being researched.

However, when a non-aqueous dispersion made of a copolymer of a hydrophilic monomer and a hydrophobic monomer is simply added to an anhydrous formulation or a W/O formulation, the dispersion is not properly dispersed or the wax is There were problems such as difficulty in dissolving in oil.

To solve this problem, the present invention provides a method for manufacturing a cosmetic composition in which the input raw materials are uniformly homogenized, and a cosmetic composition manufactured by the method. The present invention provides a cosmetic composition that has excellent makeup lasting effect and is easy to clean with a large amount of water or general facial cleanser without the need for a dedicated makeup remover or oil cleansing agent, and a method for producing the same.

In order to achieve the above-described object, the present invention includes: a) a non-polar hydrocarbon-based oil, preferably a volatile non-polar hydrocarbon-based oil; b) an oily component having a melting point of 30 to 95°C; and c) in the process of manufacturing a cosmetic composition containing a non-aqueous dispersion containing a copolymer of a hydrophilic monomer and a hydrophobic monomer, b) before adding the non-aqueous dispersion containing a copolymer of a hydrophilic monomer and a hydrophobic monomer. It provides a step comprising heating an oily ingredient having a melting point of 30 to 95°C.

The inventors of the present invention separately performed a heating process for the solid phase oil component in at least one non-polar hydrocarbon oil during the manufacturing process of a cosmetic composition containing a non-aqueous dispersion containing a copolymer of a hydrophilic monomer and a hydrophobic monomer to completely dissolve or completely dissolve the solid phase. The present invention was completed after confirming that if cosmetics are manufactured by adding a non-polar dispersion after dispersion, the added raw materials can be homogenized evenly. The term 'non-aqueous dispersion' within this specification is understood as a non-aqueous dispersion containing a copolymer of a hydrophilic monomer and a hydrophobic monomer.

The 'non-aqueous dispersion comprising a copolymer of a hydrophilic monomer and a hydrophobic monomer' preferably includes i) at least one hydrophilic monomer selected from acrylic and vinyl compounds, alkyl acrylate, alkyl methacrylate, aromatic acrylate, and aromatic methacrylate. It can be understood as a non-aqueous dispersion containing a copolymer in which one or more hydrophobic monomers selected from latent compounds are polymerized. In one embodiment, the non-aqueous dispersion may further include ii) a homopolymer in which any one or more hydrophilic monomers selected from acrylic and vinyl compounds are polymerized.

The term "hydrophilic" in this specification means that the solubility constant (δ) of a single polymer is 10.0 (cal/cm ³ ) ^1/2 or more, and "hydrophobic" means that the solubility constant (δ) of a single polymer is 10.0 (cal/cm ³ ) ¹ It means less than ^/2 .

The present invention is i) a copolymer in which at least one hydrophilic monomer selected from acrylic and vinyl compounds and at least one hydrophobic monomer selected from alkyl acrylate, alkyl methacrylate, aromatic acrylate and aromatic methacrylate compounds are polymerized. or provides a non-aqueous dispersion containing both the copolymer of i) and ii) a homopolymer in which at least one hydrophilic monomer of acrylic and vinyl compounds is polymerized.

That is, the present invention is a hydrophilic monomer (acrylic and/or vinyl compound) and a hydrophobic monomer (alkyl acrylate, alkyl meta) highly soluble in hydrocarbon oil to produce a polymer that is stable in non-aqueous dispersion, especially in non-polar hydrocarbon oil. A copolymer containing acrylate, aromatic acrylate and/or aromatic methacrylate compound) is used as a dispersion stabilizer to prepare a non-aqueous dispersion containing a hydrophilic homopolymer.

The ‘nonpolar hydrocarbon oil’ may also be used interchangeably as ‘nonpolar hydrocarbon oil solvent’ or ‘nonpolar hydrocarbon solvent’ within the present specification. It mainly contains hydrogen atoms and carbon atoms and may also contain oxygen, nitrogen, sulfur and phosphorus atoms, and has a dielectric constant at 25°C of about 1 to 10, about 1.5 to 9, or about 2 to 8. It is understood to mean oil within a range of degrees. Preferably, the non-polar hydrocarbon-based oil may be a volatile non-polar hydrocarbon-based oil. Here, volatile non-polar hydrocarbon oil refers to non-polar hydrocarbon oil that evaporates at room temperature.

For example, it may include one or more selected from the group consisting of isododecane, isoparaffin, isohexadecane, and hydrogenated polyisobutene.

One embodiment of the present invention can be prepared by mixing a hydrophilic monomer with a copolymer of a hydrophilic monomer and a hydrophobic monomer. That is, i) a copolymer is prepared by polymerizing at least one hydrophilic monomer selected from acrylic and vinyl compounds and at least one hydrophobic monomer selected from alkyl acrylate, alkyl methacrylate, aromatic acrylate and aromatic methacrylate compounds. and used as a dispersion stabilizer, and ii) mixing and polymerizing any one or more hydrophilic monomers of acrylic and vinyl compounds to prepare a non-aqueous dispersion containing a homopolymer, thereby finally producing a hydrophilic dispersion that can be stably dispersed in hydrocarbon oil. Non-aqueous dispersions can be provided.

Instead of preparing and mixing the homopolymer formed from the hydrophilic monomer and the hydrophilic-hydrophobic copolymer separately, the homopolymer formed from the hydrophilic monomer is mixed with the polymer formed from the hydrophilic-hydrophobic copolymer, so that the homopolymer of the hydrophilic monomer precipitates. You can prevent it from happening. According to one embodiment of the present invention, a stable non-aqueous dispersion can be prepared by first polymerizing a copolymer containing a large number of hydrophobic monomers and then performing secondary copolymerization while mixing a hydrophilic monomer. It is thought that the copolymer formed before the homopolymer of the hydrophilic monomer is added, like an emulsifier, wraps the homopolymer of the hydrophilic monomer inside the outer oil phase and does not cause precipitation, thereby producing a stable non-aqueous dispersion. It is not limited to these theories. This stabilized non-aqueous dispersion can provide cosmetic longevity and ease of cleaning with water by combining a homopolymer of water-soluble monomers.

At this time, the hydrophilic monomer used in the copolymer and the hydrophilic monomer used in the homopolymer may be the same or different. Specifically, a copolymer of i) "hydrophilic monomer/hydrophobic monomer" is prepared and used as a dispersion stabilizer. (hereinafter also referred to as “stabilizer copolymer”) and further mixed with a hydrophilic monomer to finally obtain a non-aqueous dispersion containing “homopolymer and copolymer”.

In this way, it is possible to prepare a dispersion that contains more than 50% by weight of hydrophilic monomer among the monomers and is stably dispersed in non-polar hydrocarbon oils, and mascara of non-aqueous dispersion (oil dispersion) formulation or W/O formulation using this is water-resistant and It has excellent cosmetic effects such as curl durability and can be easily cleaned with a large amount of water or general facial cleanser.

The total content of hydrophilic monomers in the non-aqueous dispersion of the present invention is 50 to 90% by weight, specifically 50 to 80% by weight, more specifically 55 to 75% by weight of the total weight of monomers in the non-aqueous dispersion, and the total content of hydrophobic monomers It may be 10 to 50% by weight, specifically 20 to 50% by weight, and more specifically 25 to 45% by weight of the total weight of monomers in the non-aqueous dispersion.

The content of the hydrophilic monomer mixed when preparing the stabilizer copolymer of the present invention is 1 to 40% by weight, specifically 5 to 40% by weight, and more specifically 5 to 25% by weight of the total weight of monomers in the stabilizer copolymer. It can be. If the content is less than 1% by weight, it is difficult to stabilize the homopolymer due to poor compatibility with the hydrophilic monomer (homopolymer) mixed when preparing the final dispersion. On the other hand, if the content is more than 40% by weight, the stabilizer copolymer itself acts as a solvent. It is difficult to stabilize the homopolymer due to poor solubility in the non-polar hydrocarbon oil used.

The content of the hydrophobic monomer mixed when preparing the stabilizer copolymer of the present invention is 60 to 99% by weight, specifically 60 to 95%, more specifically 75 to 95% by weight of the total weight of monomers in the stabilizer copolymer. You can. If the content is less than 60%, the stabilizer copolymer itself has poor solubility in non-polar hydrocarbon oil used as a solvent, making it difficult to stabilize the homopolymer. On the other hand, if the content is more than 99% by weight, compatibility with the homopolymer is poor. Therefore, it is difficult to stabilize the homopolymer.

The content of the homopolymer of the present invention may be 10 to 80% by weight, specifically 30 to 70% by weight, and more specifically 45 to 65% by weight of the total weight of monomers in the non-aqueous dispersion. If the content is less than 10% by weight, the effect of improving cleaning power after application to the mascara formulation is not significant. On the other hand, if the content is more than 80% by weight, a final dispersion in which the homopolymer is stably dispersed in a non-polar hydrocarbon oil is not obtained, and the homopolymer precipitates. It can be.

The hydrophilic monomer of the present invention has a solubility constant (δ) of a single polymer of 10 to 15 (cal/cm ³ ) ^1/2 , specifically 10 to 13 (cal/cm ³ ) ^1/2 , more specifically 10 to 12. (cal/cm ³ ) It may be ^1/2 . If the solubility of the hydrophilic monomer is higher than the above, it is difficult to obtain a stably dispersed dispersion in hydrocarbon oil, and if it is lower than the above, the hydrophilicity may be too low to show an improved cleaning effect.

The hydrophobic monomer of the present invention has a solubility constant (δ) of a single polymer of 5 to 9.5 (cal/cm ³ ) ^1/2 , specifically 7.5 to 9.5 (cal/cm ³ ) ^1/2 , more specifically 8 to 9.5. (cal/cm ³ ) It may be ^1/2 . If the solubility of the hydrophobic monomer is higher than the above, it may be difficult to obtain a dispersion in which the hydrophilic polymer is stably dispersed, and if the solubility is lower than the above, it may be difficult to prepare a dispersion in which the hydrophilic polymer is stably dispersed.

The hydrophilic monomer of the present invention is an acrylic and/or vinyl compound, such as 2-hydroxy ethyl acrylate, 2-hydroxy ethyl acrylate/methacrylate, acrylic acid, methacrylic acid, maleic acid, Itaconic acid, polyoxyethylene acrylate/methacrylate, polyoxypropylene acrylate/methacrylate, glyceryl acrylate/methacrylate, acrylamide, methacrylamide, N-methylacrylamide, N-methyl Methacrylamide, N-ethylacryl amide, N-ethylmethacryl amide, N-isopropyl acryl amide, N-isopropyl methacryl amide, N-butylacrylamide, N-butyl methacryl amide, N,N-dimethyl Acrylamide, N,N-dimethyl methacrylamide, N,N-diethylacrylamide, N,N-diethylmethacrylamide, N,N-dipropyl acrylamide, N,N-dipropyl methacrylamide, N,N-dibutyl acryl amide, N,N-dibutyl methacryl amide, N-methyl-N-ethylacryl amide, N-methyl-N-ethylmethacryl amide, N-methyl-N-propyl acryl amide, N-methyl-N-propylmethacrylamide, N-methyl-N-butylacrylamide, N-methyl-N-butyl methacrylamide, N-ethyl-N-propyl acrylamide, N-ethyl-N-propylmethacrylamide Crylamide, N-ethyl-N-butylacrylamide, N-ethyl-N-butyl methacrylamide, N-propyl-N-butylacrylamide, N-propyl-N-butyl methacrylamide, N-methylol acrylamide Amide, N-methylol methacryl amide, N-hydroxyethylacrylamide, N-hydroxyethylmethacryl amide, N-methoxymethyl acryl amide, N-methoxymethyl methacryl amide, N-butoxymethyl Acrylamide, N-butoxymethyl methacryl amide, N,N-dimethylaminopropyl acrylamide, N,N-dimethylaminopropylmethacrylamide, N,N-hydroxy methyl/ethyl acrylamide, N,N-hyde Roxymethyl/ethyl methacrylamide, acryloyl morpholine, N-vinyl pyrrolidone, N-vinyl-ε-caprolactam, N-vinylformamide, N-vinylacetamide, vinyl alcohol, vinyl sulfonic acid. , styrene sulfonic acid, 2-acrylamido-2-methyl-1-propanesulfonic acid, diacetone acrylamide, methyl acryl amide glycolate methyl ether, methyl methacryl amide glycolate methyl ether, N, It may be N'-methylenebisacrylamide, etc., and specifically, it may be vinyl pyrrolidone and/or 2-hydroxy ethyl acrylate. Through this, a dispersion that is stable and has excellent water resistance and cleanability can be obtained.

The hydrophobic monomer of the present invention is at least one selected from alkyl acrylate, alkyl methacrylate, aromatic acrylate and aromatic methacrylate compound, and in the alkyl acrylate/methacrylate, the alkyl group is a straight group having 1 to 20 carbon atoms. A chain-shaped, branched-chain, or cyclic alkyl group may be used, and the aromatic acrylate/methacrylate may be an aryl acrylate/methacrylate or an aryl alkyl acrylate/methacrylate. The aryl group may be an aryl group having 6 to 24 carbon atoms, and the alkyl group of the aryl alkyl group may be an alkyl group having 1 to 20 carbon atoms. For example, alkyl (meth) acrylate compounds alkyl (meth) acrylate compounds include methyl (meth) acrylate (hereinafter, acrylate and/or methacrylate are abbreviated as (meth) acrylate) and ethyl (meth) acrylate. , propyl (meth)acrylate, isopropyl (meth)acrylate, butyl (meth)acrylate, isobutyl (meth)acrylate, sec-butyl (meth)acrylate, tert-butyl (meth)acrylate, 2-ethyl (meth)acrylate. Hexyl, octyl (meth)acrylate, isooctyl (meth)acrylate, isononyl (meth)acrylate, isodecyl (meth)acrylate, isoundecyl (meth)acrylate, lauryl (meth)acrylate, isodode (meth)acrylate Sil, (meth)stearyl acrylate, isostearyl (meth)acrylate, isotridecyl (meth)acrylate, myristyl (meth)acrylate, cetyl (meth)acrylate, isooctadecyl (meth)acrylate, (meth)acrylic acid Oleyl, Icosyl (meth)acrylate, Cyclopentyl (meth)acrylate, Cyclohexyl (meth)acrylate, Butyl cyclohexyl (meth)acrylate, Dicyclofentanyl (meth)acrylate, Dicyclopentenyl (meth)acrylate Latex, dicyclopentenyloxyethyl (meth) acrylate, isoboronyl (meth) acrylate, 2-phenoxy (meth) acrylate, 2-phenoxyethyl acrylate, nonyl phenol acrylate, cyclic tri. Methylorpropane formal acrylate, tetrafurfuryl (meth)acrylate, oxazolidone (meth)acrylate, glycerol (meth)acrylate, N-acryloyloxyethyl hexahydrophthalimide, styrene , α-methylstyrene, β-methylstyrene, and 4-methylstyrene, specifically n-butyl acrylate, n-butyl methacrylate, tert-butyl acrylate, tert-butyl methacrylate, lauryl. It may be any one or more of methacrylate and stearyl methacrylate. Through this, a dispersion that is stable and has excellent water resistance and cleanability can be obtained.

The non-polar hydrocarbon oil of the present invention may be specifically a C ₈ to C ₁₆ hydrocarbon oil, more specifically a C ₁₀ to C ₁₆ hydrocarbon oil, and examples include dodecane, isododecane, isoparaffin, etc. can be used. Through this, a dispersion that is stable and has excellent water resistance and cleanability can be obtained.

The present invention also provides a method for polymerizing a mixture of at least one hydrophilic monomer selected from S1) acrylic and vinyl compounds and at least one hydrophobic monomer selected from alkyl acrylate, alkyl methacrylate, aromatic acrylate and aromatic methacrylate compounds. tea stage; and S2) a second step of polymerizing the polymer of the first step by further mixing at least one hydrophilic monomer of acrylic and vinyl compounds. By sequentially going through the second step after the first step, the homopolymer of the hydrophilic monomer does not precipitate, and a stable non-aqueous dispersion can be prepared. In addition, the stabilized non-aqueous dispersion prepared by the above method according to one embodiment can provide cosmetic longevity and ease of cleaning with water.

The non-aqueous dispersion of the present invention can be prepared by radical polymerizing the monomers forming it using a radical initiator in an organic solvent.

The method for producing a non-aqueous dispersion of the present invention may further include a hydrocarbon-based oil and a radical initiator in step S1), and may further include a radical initiator in step S2). Therefore, the non-aqueous dispersion of the present invention is prepared by preparing a copolymer through the first step of polymerization by mixing a hydrophilic monomer, a hydrophobic monomer, a hydrocarbon oil, and a radical initiator (S1) (dispersion stabilizer copolymer preparation step). ; S2) It can be prepared through the second step (homopolymer stabilization step) of polymerizing the first step polymer by mixing a radical initiator and a hydrophilic monomer.

The hydrophilic monomer of the present invention is as described above. Therefore, the solubility constant (δ) of the single polymer of the present invention may be 10 to 15 (cal/cm ³ ) ^1/2 , specifically 10 to 13 (cal/cm ³ ) ^1/2 .

The hydrophilic monomer of the present invention may specifically be vinyl pyrrolidone. Through this, a dispersion that is stable and has excellent water resistance and cleanability can be obtained.

The hydrophilic monomer used in step S1) (preparation of dispersion stabilizer copolymer) and step S2) (stabilization of homopolymer) of the present invention may be the same or different, and specifically, both steps S1) and S2) may be vinyl pyrrolidone. there is.

The hydrophobic monomer of the present invention is as described above. Therefore, the solubility constant (δ) of a single polymer may be 5 to 9.5 (cal/cm ³ ) ^1/2 , specifically 7 to 9.5 (cal/cm ³ ) ^1/2 .

The hydrophobic monomer of the present invention is specifically any one or more of n-butyl acrylate, n-butyl methacrylate, tert-butyl acrylate, tert-butyl methacrylate, lauryl methacrylate, and stearyl methacrylate. You can. Through this, a dispersion that is stable and has excellent water resistance and cleanability can be obtained.

The content of the hydrophilic monomer mixed in step S1) (dispersion stabilizer copolymer preparation) of the present invention is 1 to 40% by weight, specifically 5 to 40% by weight, more specifically, of the total weight of monomers mixed in step S1). It may be 5 to 25% by weight. If the content is less than 1% by weight, it is difficult to stabilize the homopolymer due to poor compatibility with the homopolymer. On the other hand, if the content is more than 40% by weight, it is difficult to stabilize the homopolymer due to poor solubility in non-polar hydrocarbon oil.

The content of the hydrophobic monomer mixed in step S1) (dispersion stabilizer copolymer preparation) of the present invention is 60 to 99% by weight, specifically 60 to 95% by weight, more specifically, of the total weight of monomers mixed in step S1). It may be 75 to 95% by weight. If the content is less than 60% by weight, the solubility of the copolymer in non-polar hydrocarbon oil is low, so it may precipitate or it is difficult to stabilize the homopolymer. On the other hand, if the content is more than 99% by weight, compatibility with the homopolymer is poor, making it difficult to stabilize the homopolymer. This cannot be done, causing the homopolymer to precipitate.

The total content of hydrophilic monomers in the non-aqueous dispersion prepared by the present invention is 50 to 90% by weight, specifically 50 to 80% by weight, more specifically 55 to 75% by weight of the total weight of monomers in the non-aqueous dispersion, and thus the non-aqueous dispersion The total content of hydrophobic monomers in the dispersion may be 10 to 50% by weight, specifically 20 to 50% by weight, and more specifically 25 to 45% by weight of the total weight of monomers in the non-aqueous dispersion.

The content of the hydrophilic monomer mixed in step S2) (homopolymer stabilization) of the present invention is 10 to 80% by weight, specifically 30 to 70% by weight, more specifically 45 to 65% by weight of the total weight of monomers mixed in preparing the non-aqueous dispersion. It may be weight percent. If the content is less than 10% by weight, the effect of improving cleaning power after application to the mascara formulation is not significant. On the other hand, if the content is more than 80% by weight, a final dispersion in which the homopolymer is stably dispersed in a non-polar hydrocarbon oil is not obtained, and the homopolymer precipitates. do.

The hydrocarbon oil of the present invention is as described above, and may specifically be a C ₁₆ to C ₁₈ hydrocarbon oil, and for example, dodecane, isododecane, isoparaffin, etc. may be used. Through this, a dispersion that is stable and has excellent water resistance and cleanability can be obtained.

The radical initiator of the present invention is as described above, and specifically, azo-based compounds or organic peroxide-based compounds can be used. Examples of azo-based compounds include 2,2'-azobisisobutylnitrile, 2,2'-azo. Bis(4-methoxy-2,4-dimethylvalenonitrile), 2,2`-azobis(2,4-dimethylvalenonitrile), dimethyl-2,2`-azobis(2-methylpropio) nate), 2,2`-azobis(2-methylbutyronitrile), 2,2`-azobis[N-(2-propenyl)-2-methoxypropion amide, 2,2`-azobis (N-Butyl-2-methylpropion amide, 2,2'-azobis(N-cyclohexyl-2-methylpropion amide), etc. can be used. Examples of organic peroxide compounds include lauroyl peroxide and octa. Noyl peroxide, benzoyl peroxide, cumene hydroperoxide, dicumyl peroxide, t-butyl hydroperoxide, cumyl peroxy neodecanoate, etc. can be used.

The radical initiator of the present invention can be used in the range of 0.01 to 10% by weight of the total weight of monomers in the final dispersion, specifically 0.1 to 5% by weight, and more specifically 0.5 to 2% by weight. If the content is less than 0.01% by weight, the reaction may be delayed or the polymer conversion rate may be low. On the other hand, if the content is more than 10% by weight, the molecular weight of the polymer may be so low that film properties may not appear when the formulation is applied.

The content of the radical initiator mixed in step S1) of the present invention may be 0.01 to 10% by weight, specifically 0.1 to 5% by weight, and more specifically 0.5 to 2% by weight of the total weight of monomers mixed in step S1).

The content of the radical initiator mixed in step S2) of the present invention may be 0.01 to 10% by weight, specifically 0.1 to 5% by weight, and more specifically 0.5 to 2% by weight of the total weight of monomers mixed in step S2).

The steps of the present invention may be performed at temperatures and times appropriate for dispersion preparation and stability. Therefore, step S1) of the present invention can be performed at 70 to 95°C for 4 to 10 hours, specifically at 75 to 90°C for 5 to 8 hours, more specifically at 80 to 85°C for 5.5 to 7 hours. .

Step S2) of the present invention may be maintained at the same temperature as the temperature of step S1) or within a range of approximately 10%. Therefore, step S2) of the present invention can be performed at 70 to 95°C for 5 to 24 hours, specifically at 75 to 90°C for 7 to 18 hours, and more specifically at 80 to 85°C for 10 to 15 hours.

The present invention provides a non-aqueous dispersion prepared by the method described above.

When the non-aqueous dispersion is simply added during the manufacturing process of a cosmetic composition (preferably an anhydrous formulation or a W/O formulation), due to the difference in polarity between the solid oil component (e.g. wax, solid oil, etc.) and the non-aqueous dispersion. Problems such as the dispersion not being dispersed properly or the wax not melting may occur. The present invention seeks to solve the above problem by adding a non-aqueous dispersion containing a copolymer of a hydrophilic monomer and a hydrophobic monomer after heating the oily component having a melting point of 30 to 95°C. That is, the present invention seeks to provide an anhydrous formulation or W/O formulation cosmetic composition in which oily ingredients having a melting point of 30 to 95°C are heated and sufficiently dissolved and then mixed with a non-aqueous dispersion.

The ‘oily component having a melting point of 30 to 95°C’ may specifically have a melting point of 40 to 95°C. It is in a solid state at room temperature (25°C) and is insoluble in water but soluble in oil. It may include wax, solid silicone-based film former, and other solid oil-soluble components. The types of wax, solid coating agent, and oil-soluble component are not particularly limited.

In one embodiment, the method for producing the cosmetic composition may include heating an oily ingredient having a melting point of 30 to 95° C. and then mixing it with the non-aqueous dispersion. In another embodiment, the non-polar hydrocarbon oil and the oil component having a melting point of 30 to 95°C may be heated and mixed, or they may be mixed and heated, and then the non-aqueous dispersion may be added to prepare a cosmetic composition.

In the process of manufacturing a cosmetic composition, the ingredients can be stably dispersed through a process of heating and completely dissolving the oily ingredient having a melting point of 30 to 95°C before adding the non-aqueous dispersion, and the manufactured cosmetic composition can be deposited on the surface of the keratin fiber. When applied, a stable spread may be possible and may help with the long-term stability of the composition.

The heating may be performed by applying heat at a temperature of 75°C to 99°C, preferably at 77°C to 98°C, more preferably at 78°C to 95°C. When heat is applied to the above temperature range, oily components can be effectively dissolved.

In one embodiment of the present invention, the component heated before mixing with the non-aqueous dispersion is an oily component having a melting point of 30 to 95° C. Examples of the oily component include wax, silicone-based film former, and other oily components that are solid at room temperature. May contain ingredients.

The composition according to the invention may comprise one or more waxes. “Wax” refers to a lipophilic compound that has a reversible solid/liquid state change that is solid at room temperature (25°C). The wax may be ester wax, hydrocarbon wax, fluoro wax, and/or silicone wax, and may be of plant, animal, mineral, or synthetic origin. For example, ester waxes include vegetable waxes such as carnauba wax, candelilla wax, and rice bran wax, and animal waxes such as beeswax, and hydrocarbon waxes include microcrystalline wax, ceresin, paraffin wax, and Fischer-tropsch. There are waxes and wax copolymers obtained synthetically. Silicone waxes include alkyl or alkoxy dimethicone containing 16 to 45 carbon atoms, polypropylsilsesquioxane wax, and the like.

The content of wax in the composition according to the present invention may be 0.1 to 40% by weight, specifically 1 to 30% by weight, and more specifically 3 to 20% by weight. If the content is less than 0.1% by weight, good curling power cannot be obtained. On the other hand, if the content is more than 40% by weight, the cosmetic effect is reduced, and the cleaning power of general face wash may also be reduced.

Examples of the oil-based ingredient may include a silicone-based film former to improve sustainability. Preferably, examples of the oily component may include at least one selected from the group consisting of trimethylsiloxysilicate, polymethylsilsesquioxane, and polypropylsilsesquioxane.

By using a thickening agent with appropriate thickening power, it is possible to obtain a cosmetic composition uniformly dispersed in the formulation without precipitation of the non-aqueous dispersion. In one embodiment, the dextrin fatty acid ester can be used as a thickener. By including the dextrin fatty acid ester, it can contribute to even dispersion of the non-aqueous dispersion, prevention of precipitation of ingredients, improvement of long-term stability of the formulation, and improvement of usability. A suitable thickener is preferably a thickener containing palmitate due to its structure, and by using it with a non-aqueous dispersion, it is possible to obtain a cosmetic that is uniformly dispersed in the formulation without precipitation of the dispersion.

The content of the thickener in the composition according to the present invention may be 0.1 to 30% by weight, specifically 0.5 to 20% by weight, more specifically 1 to 15% by weight, and even more specifically 1.5 to 5% by weight. If the content is less than 0.1% by weight, it does not contribute to improving the stability of the formulation, and due to insufficient thickening power, the non-aqueous dispersion may not be dispersed and may precipitate. On the other hand, if it exceeds 30% by weight, the cosmetic effect is greatly reduced, and the hardness of the formulation increases too much, making it impossible to achieve the desired cosmetic effect. The thickening agent preferably contains dextrin fatty acid ester, for example, dextrin myristate, dextrin palmitate, dextrin stearate, dextrin isostearate, dextrin palmitate/ethylhexanoate, etc., preferably palmitate. A thickener comprising dextrin palmitate, dextrin palmitate/ethylhexanoate, or mixtures thereof may be used.

Another embodiment of the present invention seeks to provide a method of improving the degree of homogenization of oily ingredients having a melting point of 30 to 95°C in a cosmetic composition containing a non-aqueous dispersion containing a copolymer of a hydrophilic monomer and a hydrophobic monomer.

The improvement in the degree of homogenization mentioned above is understood to mean the degree to which lumps of the wax component are noticeably reduced when visually confirmed at room temperature.

The present invention provides a cosmetic composition comprising the above-described non-aqueous dispersion.

The cosmetic composition of the present invention can be used as day cream, powder cream, face powder (loose or compressed), rouge, cream makeup, eye shadow, mascara, eye liner, eyebrow pencil, lipstick, lip gloss, and lip contour pencil. and nail varnish.

The cosmetic composition of the present invention may be either a water-in-oil type composition or an oil dispersion type composition.

In order to provide the cosmetic composition, it may contain commonly used cosmetic ingredients, and specifically, hydrogenated jojoba obtained by catalytic hydrogenation of animal or vegetable oil containing a linear or branched C ₈ to C ₃₂ aliphatic chain. It may include oils, such as sunflower oil, castor oil and lanolin oil, organic modified clay compounds, aprotic polar solvents, etc.

The composition according to the invention may comprise one or more organic modified clay compounds. By including an organic modified clay compound, long-term stability can be improved, the cosmetic effect is excellent, and it exhibits water and oil repellency.

The content of the organic modified clay compound in the composition according to the present invention may be 0.1 to 20% by weight, specifically 0.5 to 10% by weight, and more specifically 1 to 8% by weight. If the content is less than 0.1% by weight, mascara viscosity is not formed and usability is reduced, while if it is more than 25% by weight, mascara viscosity is too high and smooth usability is poor.

Organic modified clay compounds include surface-modified bentonites or hectorites, for example, natural or synthetic clay minerals such as montmorillonite, beidellite, nontrinite, saponite, and hectorite with quaternary ammonium salt-type cations. Compounds modified with surfactants may include dimethylalkyl ammonium hectorite, benzyl dimethylstearyl ammonium hectorite, dimethyldistearyl ammonium hectorite, and disteadimonium hectorite, but are not limited to the above substances. No. The organic modified clay compound can preferably be used in combination with a thickener containing palmitate to contribute to stabilization of the dispersion.

The composition according to the invention may comprise one or more aprotic polar solvents. The aprotic polar solvent contributes to curl sustainability and smooth usability, and its content may be 0.1 to 15% by weight, specifically 0.5 to 10% by weight, and more specifically 0.5 to 5% by weight. If the content is less than 0.1% by weight, the curl effect is reduced, while if it is more than 15% by weight, soft usability is not provided and usability is poor.

Aprotic polar solvents include, for example, propylene carbonate, triethyl citrate, diisostearyl maleate, polyglyceryl-2isostearate, and ethylhexylhydroxystearate, but are not limited to the above substances.

The composition according to the present invention can be mixed with other ingredients used in conventional cosmetics or pharmaceuticals within the range of obtaining the unique effects of good water resistance, oil resistance, adhesion, and excellent cosmetic effect.

For example, oil, surfactant, purified water, polyhydric alcohols (glycerin, propylene glycol, 1,3-butylene glycol, etc.), organic powder, inorganic powder, ultraviolet absorber, preservative, antifoam, antibacterial agent, antioxidant, cosmetic ingredient. , fragrance, thickener, gelling agent, metallic soap, water-soluble polymer, oil-soluble polymer, fiber (nylon, rayon, etc.), pigment, pearl agent, etc. can be mixed.

The content of the dispersion in the cosmetic composition according to the present invention may be 1 to 50% by weight, specifically 2 to 30% by weight, and more specifically 5 to 28% by weight of the total weight of the composition. When contained within the above range, cosmetic effects such as cleansability, water resistance, oil resistance, and curl effect, as well as usability and stability as a product are excellent.

Among the raw materials used during production, components that do not affect the dispersion of the non-aqueous dispersion consisting of a copolymer of a hydrophilic monomer and a hydrophobic monomer may be included within the scope of the present invention regardless of the order in which they are added during the process.

The present invention provides a new manufacturing method that can evenly homogenize the ingredients in the process of manufacturing a cosmetic composition that has excellent makeup lasting effect and is easily cleaned with large amounts of water or general facial cleansers without the need for a dedicated makeup remover or oil cleansing agent. can do.

The present invention solves the problem of the dispersion not being properly dispersed due to the difference in polarity between the non-aqueous dispersion and the wax component during the mixing process, and provides a method for manufacturing a cosmetic composition that can induce even dispersion of the mixing components.

Figure 1 is a photograph showing the degree to which wax is homogenized in a non-aqueous dispersion containing wax before adding pigment. The left side shows an evenly dispersed photograph of Comparative Example 1, and the right side represents an evenly dispersed photograph of Example 1.
Figure 2 is a photograph showing the mascara compositions of Example 1 and Comparative Example 1. In Comparative Example 1 on the left, white lumps are observed in the black mascara composition liquid, and in Example 1 on the right, the raw materials are evenly dispersed with the naked eye. This is observed.
Figure 3 shows the results of comparing the stability of non-aqueous dispersions according to thickeners.

Hereinafter, the present invention will be described in more detail through examples. However, these are only for explaining the present invention in more detail and the scope of the present invention is not limited thereto.

Check dispersibility according to the order of addition of non-aqueous dispersion containing copolymers of hydrophilic monomers and hydrophobic monomers

A mascara composition having the composition shown in Table 1 below was prepared.

ingredient Content (% by weight) ⓐ One isododecane To 100 ⓑ 2 Trimethylsiloxysilicate Appropriate amount 3 ceresin 5 4 Micro crystalline wax 5 5 beeswax 2 6 Carnauba wax One 7 Dextrin Palmitate 3 etc 9 propylene carbonate One 10 Disteadimonium hectorite 3 ⓒ 11 Non-aqueous dispersion containing a copolymer of hydrophilic monomers and hydrophobic monomers 25 ⓓ 12 black iron oxide 6 13 talc 10

A non-aqueous dispersion consisting of a copolymer of the hydrophilic monomer and hydrophobic monomer of ⓒ above was prepared as follows.

In a reactor equipped with a cooler, nitrogen injector, thermometer, and stirrer, 300 g of isododecane, a non-polar hydrocarbon oil, 20 g of vinyl pyrrolidone, a hydrophilic monomer, 40 g of n-butyl acrylate, a hydrophobic monomer, and 40 g of stearyl methacrylate were added. After mixing uniformly, the temperature was raised to 85°C. Then, 1 g of the radical initiator 2,2'-azobisisobutylnitrile was added and reacted for 6 hours to synthesize a copolymer (step 1). After the reaction, a mixed solution of 100 g of hydrophilic monomer vinyl pyrrolidone and 1 g of initiator 2,2'-azobisisobutylnitrile was slowly added and reacted at 85°C for 12 hours (step 2). Finally, a copolymer of vinyl pyrrolidone/n-butyl acrylate/stearyl methacrylate: 1/2/2 (weight ratio) was obtained, and polyvinyl pyrrolidone/first-stage copolymer: 50/50 ( It was possible to obtain a hydrophilic high-molecular oil-dispersed polymer with a weight ratio). The size of the obtained polymer particles was 86 nm, and they were stably dispersed in isododecane, and a hydrophilic single polymer/copolymer complex polymer with a hydrophilic monomer content of 60% compared to the total polymer was obtained.

The compositions in Table 1 were mixed in different mixing orders according to Examples 1 to 2 and Comparative Examples 1 to 2.

If the anhydrous formulation or W/O formulation contains a non-aqueous dispersion consisting of a copolymer of a hydrophilic monomer and a hydrophobic monomer, the process of completely dissolving and dispersing ⓑ solid wax, solid coating agent, and other oil-soluble solid components by heating them in ⓐ volatile solvent. To prepare a homogenized mascara formulation, you must first proceed and then add ⓒ a non-aqueous dispersion consisting of a copolymer of a hydrophilic monomer and a hydrophobic monomer.

Among the raw materials ⓐ, ⓑ, ⓒ, and ⓓ input in the process, completely dissolving ⓑ in ⓐ and then dissolving ⓒ can be said to be the most important part of the process.

Example 1.

Step 1) Add at least one ⓐ volatile oil

Step 2) Add ingredients ⓑ (solid wax, solid coating agent, and other oil-soluble solid ingredients)

Step 3) Completely mix, dissolve and disperse by heating the mixture obtained in step 2 above to 80℃ or higher.

Step 4) After confirming that the mixture obtained in step 3 is completely dissolved and dispersed, ⓒ non-aqueous dispersion consisting of a copolymer of hydrophilic monomer and hydrophobic monomer is added.

Step 5) Add other ingredients

Step 6) ⓓInput pigment and antifoam agent

Step 7) Disperse contents

Step 8) Defoaming and cooling

Example 2.

Step 1) Add at least one ⓐvolatile oil

Step 2) Heating the volatile oil from step 1 above to 80℃ or higher

Step 3) Add ingredients ⓑ (solid wax, solid coating agent, and other oil-soluble solid ingredients)

Step 4) Completely mix, dissolve and disperse by heating the mixture obtained in step 3 above to 80℃ or higher.

Step 5) After confirming that the mixture obtained in step 4 is completely dissolved and dispersed, ⓒnon-aqueous dispersion consisting of a copolymer of a hydrophilic monomer and a hydrophobic monomer is added.

Step 6) Add other ingredients

Step 7) ⓓInput pigment and antifoam agent

Step 8) Disperse contents

Step 9) Defoaming and cooling

Comparative Example 1.

Step 1) Add at least one ⓐvolatile oil

Step 2) Add ingredients ⓑ (solid wax, solid coating agent, other oil-soluble solid ingredients) and ⓒ non-aqueous dispersion consisting of copolymer of hydrophilic monomer and hydrophobic monomer.

Step 3) Heat the mixture from step 2 above 80℃ to completely mix, dissolve and disperse.

Step 4) Add other ingredients

Step 5) ⓓInput colorant and defoamer

Step 6) Disperse contents

Step 7) Defoaming and cooling

Comparative Example 2.

Step 1) Add at least one ⓐvolatile oil

Step 2) Heating the volatile oil from step 1 above to 80℃ or higher

Step 3) Inject together ingredients ⓑ (solid wax, solid coating agent, and other oil-soluble solid ingredients) and ⓒnon-aqueous dispersion consisting of a copolymer of hydrophilic monomer and hydrophobic monomer.

Step 4) Completely mix, dissolve and disperse by heating the mixture from step 3 above to 80℃ or higher.

Step 5) Add other ingredients

Step 6) ⓓInput pigment and antifoam agent

Step 7) Disperse contents

Step 8) Defoaming and cooling

In the above process, the process was carried out right before the dye was added, and then it was visually determined whether it was homogenized, and it is shown in Table 2 below. (O: homogeneous, X: raw material precipitation without homogenization)

degree of homogeneity Example 1 O Example 2 O Comparative Example 1 X Comparative Example 2 X

After preparing the mascara composition in the same manner as above, it was visually determined whether it was uniformly prepared, and it is shown in Table 3 below. (O: homogeneous, X: raw material precipitation without homogenization)

degree of homogeneity Example 1 O Example 2 O Comparative Example 1 X Comparative Example 2 X

As shown in Tables 2 and 3, it can be seen that the ingredients of Examples 1 and 2 were homogeneously mixed. That is, through the above experiment, the composition containing a non-aqueous dispersion consisting of a copolymer of a hydrophilic monomer and a hydrophobic monomer was obtained after going through the process of completely dissolving and dispersing the solid wax, solid coating agent, and other oil-soluble solid components in a volatile solvent by heating them. It was confirmed that adding a non-aqueous dispersion is advantageous for homogeneous mixing.

Confirmation of dispersibility of non-aqueous dispersion according to thickener

[Preparation of non-aqueous dispersion consisting of copolymer of hydrophilic monomer and hydrophobic monomer]

A non-aqueous dispersion consisting of a copolymer of a hydrophilic monomer and a hydrophobic monomer was prepared as follows.

In each reactor equipped with a nitrogen injector, thermometer, and stirrer, 300 g of isododecane, a non-polar hydrocarbon oil, 20 g of vinyl pyrrolidone, a hydrophilic monomer, 40 g of n-butyl acrylate, a hydrophobic monomer, and 40 g of stearyl methacrylate were added. After mixing uniformly, the temperature was raised to 85°C. Then, 1 g of the radical initiator 2,2'-azobisisobutylnitrile was added and reacted for 6 hours to synthesize a copolymer (step 1). After the reaction, a mixed solution of 100 g of hydrophilic monomer vinyl pyrrolidone and 1 g of initiator 2,2'-azobisisobutylnitrile was slowly added and reacted at 85°C for 12 hours (step 2). Finally, a copolymer of vinyl pyrrolidone/n-butyl acrylate/stearyl methacrylate: 1/2/2 (weight ratio) was obtained, and polyvinyl pyrrolidone/first-stage copolymer: 50/50 ( It was possible to obtain a hydrophilic high-molecular oil-dispersed polymer with a weight ratio). The size of the obtained polymer particles was 86 nm, and they were stably dispersed in isododecane, and a composite polymer of hydrophilic single polymer/copolymer with a hydrophilic monomer content of 60% compared to the total polymer was obtained.

[Manufacture of examples and comparative examples]

To compare the dispersion power of thickeners that thicken volatile oils, the degree of dispersion after mixing was checked as shown in the table below. Oil thickeners were used as thickeners that can be dispersed and dissolved in the same solvent as the volatile oil thickener. The non-aqueous dispersion consisting of a copolymer of a hydrophilic monomer and a hydrophobic monomer prepared by the method specified above was used. The volatile oil can be selected from hydrocarbon-based volatile oils such as isododecane or liquid paraffin, and isododecane was used in the experiment.

Example 1 Example 2 Comparative Example 1 Comparative example 2 Comparative Example 3 Comparative Example 4 isododecane 75 75 75 75 75 75 Non-aqueous dispersion containing a copolymer of hydrophilic monomer and hydrophobic monomer 20 20 20 20 20 20 thickener Dextrin Palmitate ¹⁾ 5 Dextrin palmitate/ethylhexanoate ²⁾ 5 Ethylenediamine/stearyl dimer dilinoleate copolymer ³⁾ 5 Polyamide-8 ⁴⁾ 5 Hydrogenated styrene/isoprene copolymer ⁵⁾ 5 Hydrogenated styrene/butadiene copolymer ⁶⁾ 5 Sum 100 100 100 100 100 100

One) Rheopearl KL2 (Manufacturer: CHIBA FLOUR, Japan)2) Rheopearl TT2 (Manufacturer: CHIBA FLOUR, Japan)

3) Oleocraft LP-10 (Manufacturer: ARIZONACHEMICAL, USA)

4) Oleocraft LP-20 (Manufacturer: ARIZONACHEMICAL, USA)

5) Kraton G1701 (Manufacturer: Shell, USA)

6) Kraton G1652 (Manufacturer: Shell, USA)

The manufacturing methods of Examples 1 to 2 and Comparative Examples 1 to 4 are as follows.

1. Heat isododecane to 80℃.

2. Add each thickener (1 to 6) and allow to completely disperse for 10 minutes.

3. Add the non-aqueous dispersion containing a copolymer of hydrophilic monomer and hydrophobic monomer and disperse for 5 minutes.

4. Cool to room temperature.

The results of visual confirmation of the mixed solution prepared according to the table and manufacturing method above after being stored at room temperature for one week are shown in Figure 3. O: Evenly dispersed without layer separation, Δ: Partial precipitation occurs, X: Complete layer separation.

In Examples 1 and 2, it was confirmed that the non-aqueous dispersion consisting of a copolymer of a hydrophilic monomer and a hydrophobic monomer was evenly dispersed, but in Comparative Examples 1 to 4, it was not uniformly dispersed and settled. If the non-aqueous dispersion is not uniformly dispersed, problems with stability over time may occur when applied to the formulation. In Comparative Example 1, some precipitation was found, and it was confirmed that layer separation became more severe over time.

[Manufacture of manufacturing example]

Examples of cosmetics (mascara) of an anhydrous or W/O formulation containing a non-aqueous dispersion containing a copolymer of a hydrophilic monomer and a hydrophobic monomer are shown in Table 5 below.

Content (% by weight) One isododecane To 100 2 Trimethylsiloxysilicate Appropriate amount 3 ceresin 5 4 Micro crystalline wax 5 5 Dextrin Palmitate 3 6 propylene carbonate One 7 Disteadimonium hectorite 3 8 Non-aqueous dispersion containing a copolymer of hydrophilic monomers and hydrophobic monomers 25 9 black iron oxide 6 10 talc 10

The manufacturing method is as follows.

1. Mix and heat components 2 to 6 and a portion of component 1 and then disperse evenly.

2. Mix the remaining amount of component 1 and component 7, heat and disperse evenly.

3. Add component 8 and disperse evenly.

Add components 9 and 10 and disperse evenly, then cool and defoame.

In the above, the applicant has described preferred embodiments of the present invention, but such embodiments are only embodiments that implement the technical idea of the present invention, and no changes or modifications are allowed as long as the technical idea of the present invention is implemented. It should be interpreted as falling within the scope.

Claims (11)

A cosmetic composition containing a) a non-polar hydrocarbon oil, and b) a non-aqueous dispersion containing a copolymer of a hydrophilic monomer and a hydrophobic monomer, and a homopolymer in which at least one hydrophilic monomer of an acrylic or vinyl compound is polymerized. ,
The cosmetic composition is characterized in that it contains dextrin fatty acid ester. The cosmetic composition of claim 1, wherein the dextrin fatty acid ester includes dextrin myristate, dextrin palmitate, dextrin stearate, dextrin isostearate, dextrin palmitate/ethylhexanoate, or a mixture thereof. The cosmetic composition of claim 1, wherein the dextrin fatty acid ester is contained in an amount of 0.1 to 30% by weight based on the total weight of the composition. The cosmetic composition according to claim 1, further comprising: c) an oily component having a melting point of 30 to 95°C. The cosmetic composition according to claim 1 or 4, further comprising one or more organic modified clay compounds. The cosmetic composition of claim 1 or 4, wherein the cosmetic composition further comprises one or more types of aprotic polar solvent. The cosmetic composition according to claim 1, wherein a) the non-polar hydrocarbon-based oil is a volatile non-polar hydrocarbon-based oil. The cosmetic composition according to claim 1 or 4, further comprising a silicone-based film former. The method of claim 1, wherein the copolymer of the hydrophilic monomer and the hydrophobic monomer is
i) at least one hydrophilic monomer selected from acrylic and vinyl compounds,
ii) A cosmetic composition that is a copolymer in which at least one hydrophobic monomer selected from alkyl acrylate, alkyl methacrylate, aromatic acrylate, and aromatic methacrylate compound is polymerized. The cosmetic composition of claim 1, wherein the content of the non-aqueous dispersion contained in the cosmetic composition is 1 to 50% by weight of the total weight of the composition. The cosmetic composition of claim 1, wherein the cosmetic composition is mascara.