Cosmetic composition

Abstract

Provided is a cosmetic composition, which is a cosmetic composition in which pigment particles are mixed in an oil component, and which has improved secondary adhesion-free effects while improving the dispersibility of the pigment particles. A cosmetic composition including pigment particles surface-treated with an ester compound formed from a fatty acid having 8 to 20 carbon atoms and glycerin, an oil component including at least one silicone oil, and at least one of an organosilicon-based dispersant having an HLB value of 2.5 or greater and 7.5 or less and an amodimethicone dispersant.

Description

Technical Field

[0001] This invention relates to cosmetic compositions. Background Technology

[0002] As cosmetics containing pigment particles, they are known to include makeup primers, foundations, loose powders, blushes, eyeshadows, lipsticks, eyeliners, or eyebrow pencils, as well as skin care cosmetics such as whitening cosmetics or UV care cosmetics.

[0003] Such cosmetics typically contain a blend of pigment particles and oils. However, untreated pigment particles, especially those containing metallic elements, can sometimes degrade other components of the cosmetic. Therefore, surface-treated pigment particles are usually used.

[0004] For example, Patent Document 1 discloses a cosmetic powder material containing a cosmetic powder having been surface-treated with an ester compound formed from fatty acids having 8 to 20 carbon atoms and glycerol.

[0005] In addition, Patent Document 2 discloses a cosmetic powder that has been surface-treated with an ester compound formed from isostearic acid and diglycerides.

[0006] Existing technical documents

[0007] Patent documents

[0008] Patent Document 1: International Publication No. 2022 / 030462

[0009] Patent Document 2: Japanese Patent Application Publication No. 2023-007281 Summary of the Invention

[0010] The problem that the invention aims to solve

[0011] When surface-treated pigment particles are dispersed in oil and blended into cosmetics such as foundation, poor dispersibility can easily lead to uneven color due to the surface-treated pigment particles. Therefore, excellent dispersibility of surface-treated pigment particles relative to oil is required.

[0012] On the other hand, when applying such cosmetics, such as foundations containing pigment particles, to the skin, one should also consider the issue of the pigment particles being re-adhered from the skin to masks, clothing, etc. (the so-called "secondary adhesion problem").

[0013] Therefore, it is necessary to ensure that the surface-treated pigment particles have both the effect of dispersibility in oil and the effect of no secondary adhesion.

[0014] The present invention aims to improve the above-mentioned situation and its object is to provide a cosmetic composition that contains pigment particles mixed in an oil, which improves the dispersibility of the pigment particles and also improves the effect of no secondary adhesion.

[0015] Methods for solving problems

[0016] The present invention that achieves the above objectives is shown below.

[0017] <Option 1>

[0018] A cosmetic composition comprising the following ingredients:

[0019] (A) Pigment particles surface-treated with ester compounds formed from fatty acids with 8-20 carbon atoms and glycerol;

[0020] (B) Oils containing at least one type of silicone oil, and

[0021] (C) At least one of the following: an organosilicon dispersant with an HLB value of 2.5 or higher and 7.5 or lower, and an amino-terminated polydimethylsiloxane dispersant.

[0022] <Option 2>

[0023] According to the cosmetic composition of Scheme 1, the ester compound is selected from at least one of diglycerol tetraisostearate, diglycerol triisostearate, tri(caprylic / capric)glyceride, glycerol dilaurate, glycerol triisostearate, decaglycerol monoisostearate, and decaglycerol diisostearate.

[0024] <Option 3>

[0025] According to the cosmetic composition of Scheme 1 or 2, the aforementioned silicone-based dispersant comprises at least one selected from polyether-modified silicone and polyether alkyl co-modified silicone.

[0026] <Option 4>

[0027] According to the cosmetic composition of Scheme 3, the above-mentioned polyether alkyl co-modified organosilicon is cetyl PEG / PPG-10 / 1 polydimethylsiloxane.

[0028] <Option 5>

[0029] According to any one of Schemes 1 to 4, the pigment particles in the cosmetic composition comprise at least one selected from titanium dioxide, iron oxide yellow, iron oxide red, iron oxide black, talc, zinc oxide, silicon dioxide, pearlescent mica, mica, and sericite.

[0030] <Option 6>

[0031] In the cosmetic composition according to any one of Schemes 1 to 5, the silicone oil accounts for 80% or more by mass in the total amount of the oil components.

[0032] <Option 7>

[0033] According to any one of Schemes 1 to 6, the cosmetic composition contains 5.0 to 50 parts by mass of the surface-treated pigment particles relative to a total of 100 parts by mass of the above-mentioned components (A), (B), and (C).

[0034] <Option 8>

[0035] According to any one of Schemes 1 to 7, the cosmetic composition comprises 40 to 90 parts by weight of the oil relative to a total of 100 parts by weight of the above-mentioned components (A), (B), and (C).

[0036] <Option 9>

[0037] According to any one of Schemes 1 to 8, in the cosmetic composition, the component (C) is 0.5 to 30 parts by mass relative to a total of 100 parts by mass of the above-mentioned component (A), the above-mentioned component (B) and the above-mentioned component (C).

[0038] <Option 10>

[0039] According to any one of Schemes 1 to 9, in the cosmetic composition, the component (C) is 5.0 parts by mass or more relative to 100 parts by mass of component (A).

[0040] <Option 11>

[0041] An oily cosmetic comprising the cosmetic composition described in any one of Schemes 1 to 10.

[0042] <Option 12>

[0043] An oil-in-water emulsified cosmetic, comprising any one of the cosmetic compositions described in Schemes 1 to 10.

[0044] <Option 13>

[0045] An oil-in-water emulsified cosmetic, comprising any one of the cosmetic compositions described in Schemes 1 to 10.

[0046] The effects of the invention

[0047] According to the present invention, a cosmetic composition is provided that contains pigment particles mixed in with oil, which improves the dispersibility of the pigment particles and also improves the effect of no secondary adhesion. Detailed Implementation

[0048] The embodiments of the present invention are described in detail below. It should be noted that the present invention is not limited to the following embodiments, and various modifications can be implemented within the scope of the spirit of the invention.

[0049] Cosmetic Compositions

[0050] The cosmetic composition of the present invention (hereinafter also referred to as "the composition of the present invention") is a cosmetic composition comprising the following ingredients:

[0051] (A) Pigment particles surface-treated with ester compounds formed from fatty acids with 8-20 carbon atoms and glycerol;

[0052] (B) Oils containing at least one type of silicone oil, and

[0053] (C) At least one of the following: an organosilicon dispersant with an HLB value of 2.5 or higher and 7.5 or lower, and an amino-terminated polydimethylsiloxane dispersant.

[0054] The composition of the present invention can combine the effects of pigment particle dispersibility in oil and no secondary adhesion.

[0055] It should be noted that, in this invention, the term "no secondary adhesion effect" is in contrast to the aforementioned "secondary adhesion problem," referring to the effect that even when a mask or clothing comes into contact with skin coated with a cosmetic containing pigment particles, the pigment particles, etc., are not easily adhered to the mask or clothing, preferably not at all. Furthermore, the effect of no secondary adhesion can be evaluated using methods such as those shown in the embodiments described later.

[0056] The inventors have discovered that, regarding cosmetic compositions containing surface-treated pigment particles, while improving the effect of preventing secondary adhesion by adjusting the composition, the dispersibility of the surface-treated pigment particles in oil tends to deteriorate relatively. In other words, it is difficult to simultaneously achieve both good dispersibility of pigment particles in oil and the effect of preventing secondary adhesion in cosmetic compositions containing pigment particles.

[0057] Therefore, through further in-depth research, the inventors discovered that by adjusting the dispersibility of pigment particles in the oil to a moderate level, rather than excessively increasing it, a non-secondary adhesion effect can be ensured. More specifically, in the composition of the present invention, by mixing pigment particles surface-treated with the ester compound involved in the present invention into a specific oil, a specific dispersant is also mixed in, thereby achieving both the dispersibility of pigment particles in the oil and the effect of no secondary adhesion.

[0058] Here, "moderate dispersibility" refers to the degree to which a composition containing pigment particles surface-treated with the ester compound involved in this invention does not exhibit uneven color distribution when used in cosmetics such as foundation. Furthermore, "moderate dispersibility" can be judged comprehensively by considering both the dispersibility immediately after preparation and the dispersibility over time. More specifically, in evaluating dispersibility, a composition is considered to have "moderate dispersibility" if it exhibits good dispersibility immediately after preparation and good dispersibility over time. Conversely, a composition is not evaluated as having "moderate dispersibility" if, for example, it exhibits good dispersibility immediately after preparation but deteriorates over time.

[0059] However, through in-depth research by the inventors, it was found that the correspondence between such "moderate dispersibility" and the effect of no secondary adhesion can be applied to pigment particles that have been surface-treated with the ester compound involved in this invention, but not to pigment particles that have been surface-treated with other surface treatment agents (e.g., Comparative Examples 4 and 7).

[0060] It should be noted that Patent Documents 1 and 2, mentioned above, describe the use of the ester compound involved in this invention to surface-treat pigment particles in oil to improve the dispersibility of surface-treated pigment particles in oil. However, they do not aim to improve the effect of preventing secondary adhesion in cosmetic compositions such as foundation containing pigment particles. Furthermore, Patent Documents 1 and 2 do not focus on simultaneously achieving both good dispersibility of pigment particles in oil and the effect of preventing secondary adhesion.

[0061] <Components>

[0062] The composition of the present invention comprises pigment particles surface-treated with the ester compound involved in the present invention (component (A)), an oil comprising at least one type of silicone oil (component (B)), and at least one of an organosilicon dispersant and an amino-terminated polydimethylsiloxane dispersant with an HLB value of 2.5 or higher and 7.5 or lower (component (C)). These constituent components will be described in detail below.

[0063] [Ingredients (A)]

[0064] (Surface-treated pigment particles)

[0065] In this invention, the surface-treated pigment particles are pigment particles that have been surface-treated with the ester compound involved in this invention.

[0066] In the composition of the present invention, the content of surface-treated pigment particles is not particularly limited. For example, relative to a total of 100 parts by weight of surface-treated pigment particles (component (A)), oil containing at least one type of silicone oil (component (B)), and at least one of an organosilicon dispersant and an amino-terminated polydimethylsiloxane dispersant with an HLB value of 2.5 or more and 7.5 or less (component (C)), the content of surface-treated pigment particles can be 5.0 parts by weight or more, 6.0 parts by weight or more, 7.0 parts by weight or more, 8.0 parts by weight or more, 9.0 parts by weight or more, 10 parts by weight or more, 11 parts by weight or more, 12 parts by weight or more, 13 parts by weight or more, 14 parts by weight or more, 15 parts by weight or more, 16 parts by weight or more, or 17 parts by weight. The quantities can be 18 or more parts by weight, 19 or more parts by weight, 20 or more parts by weight, 21 or more parts by weight, 22 or more parts by weight, 22 or more parts by weight, 23 or more parts by weight, 24 or more parts by weight, 25 or more parts by weight, 26 or more parts by weight, 27 or more parts by weight, 28 or more parts by weight, 29 or more parts by weight, or 30 or more parts by weight. Alternatively, the quantities can be less than 50 parts by weight, less than 45 parts by weight, less than 40 parts by weight, less than 39 parts by weight, less than 38 parts by weight, less than 37 parts by weight, less than 36 parts by weight, less than 35 parts by weight, less than 34 parts by weight, less than 33 parts by weight, less than 32 parts by weight, less than 31 parts by weight, or less than 30 parts by weight.

[0067] The ester compound involved in this invention is not particularly limited, but it is preferred to use a substance that prevents or makes it difficult for pigment particles, which are the object of surface treatment, to be colored.

[0068] Here, the fatty acid with 8 to 20 carbon atoms in the ester compound of the present invention can specifically be, for example, fatty acids with 8 or more, 10 or more, 12 or more, 14 or more, 16 or more, or 18 or more carbon atoms, and fatty acids with 20 or fewer, 19 or fewer, or 18 or fewer carbon atoms can also be used. Among these, fatty acids with 8 or more and 18 or fewer carbon atoms are preferred, and fatty acids with 12 or more and 18 or fewer carbon atoms are even more preferred. In addition, the fatty acid involved can be branched or linear.

[0069] Furthermore, the glycerol used as the ester compound involved in this invention can be unpolymerized (i.e., monomeric) monoglycerol or polymerized (i.e., polymeric) polyglycerol. When using polyglycerol, its degree of polymerization is not particularly limited, but is preferably 2 or more and 10 or less. As glycerol, monoglycerol as a monomer, diglycerol with a degree of polymerization of 2, or decaglycerol with a degree of polymerization of 10 are preferred.

[0070] The ester compounds involved in this invention may contain at least one selected from, for example, diglycerol tetraisostearate, diglycerol triisostearate, diglycerol diisostearate, diglycerol monoisostearate, tri(caprylic / capric)glyceride, glycerol triethylhexanoate, glycerol dilaurate, glycerol triisostearate, decaglycerol monoisostearate, and decaglycerol diisostearate. Among these, for example, from the viewpoint of improving the oleophilicity of the surface-treated pigment particles and from the viewpoint of using naturally derived raw materials, diglycerol tetraisostearate, diglycerol triisostearate, glycerol dilaurate, glycerol triisostearate, decaglycerol monoisostearate, and decaglycerol diisostearate are preferred as the ester compounds involved in this invention.

[0071] As for the method of surface treatment of pigment particles using the ester compound involved in this invention, there are no particular limitations, and reference may be made, for example, to the "method for manufacturing powder material for cosmetics" disclosed in Patent Document 1.

[0072] In this invention, pigment particles for surface treatment can be used regardless of their shape (spherical, rod-shaped, needle-shaped, plate-shaped, irregular shape, flake-shaped, spindle-shaped, etc.), particle size (smoky, microparticle, pigment grade, etc.), or particle structure (porous, non-porous, etc.). Examples include inorganic pigment powders (containing natural mineral pigments or synthetic inorganic pigments, etc.), organic pigments, and organic pigment particles, but are not limited to these.

[0073] More specifically, examples of inorganic pigments include, but are not limited to, titanium oxide, iron oxide yellow, iron oxide red, iron oxide black, talc, zinc oxide, silicon oxide, pearlescent mica, mica, carbon black, iron oxide, cerium oxide, manganese violet, cobalt violet, chromium oxide, chromium hydroxide, cobalt titanate, ultramarine, Prussian blue, magnesium oxide, zirconium oxide, kaolin, sericite, muscovite, phlogopite, synthetic mica, ruby, biotite, vermiculite, silicon dioxide, calcium carbonate, magnesium carbonate, magnesium silicate, aluminum silicate, barium silicate, calcium silicate, barium sulfate, calcium sulfate, calcium phosphate, hydroxyapatite, boron nitride, pearlescent pigments, and bismuth oxychloride.

[0074] Examples of organic pigments include, but are not limited to, Red No. 3, Red No. 10, Red No. 106, Red No. 201, Red No. 202, Red No. 204, Red No. 205, Red No. 220, Red No. 226, Red No. 227, Red No. 228, Red No. 230, Red No. 401, Red No. 405, Red No. 505, Yellow No. 4, Yellow No. 5, Yellow No. 202, Yellow No. 203, Yellow No. 205, Yellow No. 401, Orange No. 201, Orange No. 203, Orange No. 204, Orange No. 205, Orange No. 206, Orange No. 207, Blue No. 1, Blue No. 2, Blue No. 201, Blue No. 404, Green No. 3, Green No. 201, Green No. 204, and Green No. 205.

[0075] Examples of organic pigment powders include, but are not limited to, tar pigments, nylon powders, cellulose powders, polyethylene powders, polymethyl methacrylate powders, polystyrene powders, acrylic powders, and organosilicon powders.

[0076] In addition, these pigment particles can be used alone or in combination.

[0077] In this invention, from the viewpoint of use in makeup materials such as foundation, eyeshadow, eyebrow pencil, and blush, the pigment particles in the above examples may contain at least one selected from titanium dioxide, iron oxide yellow, iron oxide red, iron oxide black, talc, zinc oxide, silicon dioxide, pearlescent mica, mica, and sericite.

[0078] [Ingredient (B)]

[0079] (oil content)

[0080] In the compositions of the present invention, the oil component comprises at least one silicone oil. Here, "silicone oil" refers to a substance having a main framework based on siloxane bonds in an oil component that can be used in cosmetics.

[0081] Through in-depth research, the inventors have discovered that pigment particles surface-treated with the ester compound involved in this invention exhibit moderate dispersibility in the presence of a specific dispersant described later in an oil containing at least one type of silicone oil.

[0082] In the compositions of the present invention, the oil content is not particularly limited. For example, relative to a total of 100 parts by weight of the surface-treated pigment particles (component (A)), the oil comprising at least one type of silicone oil (component (B)), and at least one of an organosilicon dispersant and an amino-terminated polydimethylsiloxane dispersant with an HLB value of 2.5 or more and 7.5 or less (component (C)), the oil content can be 40 parts by weight or more, 42 parts by weight or more, 44 parts by weight or more, 46 parts by weight or more, 48 parts by weight or more, 50 parts by weight or more, 52 parts by weight or more, 54 parts by weight or more, 56 parts by weight or more, or 58 parts by weight or more. More than 60 parts by weight, more than 62 parts by weight, more than 64 parts by weight, more than 66 parts by weight, more than 68 parts by weight, more than 70 parts by weight, more than 72 parts by weight, more than 74 parts by weight, more than 76 parts by weight, more than 78 parts by weight, more than 80 parts by weight, more than 82 parts by weight, more than 85 parts by weight, more than 86 parts by weight, or more than 88 parts by weight. Alternatively, it can be less than 90 parts by weight, less than 85 parts by weight, less than 80 parts by weight, less than 75 parts by weight, less than 70 parts by weight, less than 65 parts by weight, or less than 60 parts by weight.

[0083] Furthermore, from the viewpoint of dispersing pigment particles surface-treated with the ester compound involved in this invention in an oil fraction, the oil fraction can be, for example, 150 parts by mass or more, 200 parts by mass or more, 250 parts by mass or more, 300 parts by mass or more, 350 parts by mass or more, 400 parts by mass or more, 450 parts by mass or more, 500 parts by mass or more, 550 parts by mass or more, 600 parts by mass or more, 650 parts by mass or more, 700 parts by mass or more, 750 parts by mass or more, 800 parts by mass or more, 850 parts by mass or more, 900 parts by mass or more, 950 parts by mass or more, or 1000 parts by mass or more, or it can be less than 2000 parts by mass, less than 1800 parts by mass, less than 1500 parts by mass, less than 1200 parts by mass, less than 1000 parts by mass, less than 800 parts by mass, or less than 500 parts by mass, relative to 100 parts by mass of the surface-treated pigment particles mentioned above.

[0084] In this invention, the silicone oil can be either acyclic silicone oil (i.e., chain silicone oil, such as linear silicone oil and branched silicone oil) or cyclic silicone oil. Among these, for example, from the viewpoint of improving usability, acyclic silicone oil is preferred, and linear silicone oil and branched silicone oil are particularly preferred.

[0085] In this invention, specific examples of silicone oils include, for example, chain silicone oils such as polydimethylsiloxane (also known as "dimethyl silicone oil"), methylphenyl polysiloxane (also known as "diphenylsiloxyphenyl polytrimethylsiloxane"), and methylhydropolysiloxane, cyclic silicone oils such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecylcyclohexasiloxane, and mixtures of two or more thereof, but are not limited to these. It should be noted that in polydimethylsiloxane (dimethyl silicone oil), for example, "dimethyl silicone oil 1.5cs" and "dimethyl silicone oil 2.0cs" can be used as volatile components, and "dimethyl silicone oil 6cs" and "dimethyl silicone oil 10cs" can be used as non-volatile components.

[0086] In the composition of the present invention, the oil content of the silicone oil relative to the total oil content can be, for example, 80% by mass or more, 81% by mass or more, 82% by mass or more, 83% by mass or more, 84% by mass or more, 85% by mass or more, 86% by mass or more, 87% by mass or more, 88% by mass or more, 89% by mass or more, 90% by mass or more, 91% by mass or more, 92% by mass or more, 93% by mass or more, 94% by mass or more, 95% by mass or more, 96% by mass or more, 97% by mass or more, 98% by mass or more, 99% by mass or more, or 100% by mass. Alternatively, it can be less than 100% by mass, less than 99% by mass, less than 98% by mass, less than 97% by mass, less than 96% by mass, or less than 95% by mass.

[0087] [Ingredient C]

[0088] (Dispersant)

[0089] In the compositions of the present invention, the dispersant is at least one of an organosilicon-based dispersant with an HLB value of 2.5 or higher and 7.5 or lower, and an amino-terminated polydimethylsiloxane dispersant (hereinafter also simply referred to as "the dispersant of the present invention"). That is, the dispersant of the present invention can be an organosilicon-based dispersant with an HLB value of 2.5 or higher and 7.5 or lower, or an amino-terminated polydimethylsiloxane dispersant. By using the dispersant of the present invention, pigment particles surface-treated with the ester compound of the present invention can be dispersed in the above-mentioned oil, thereby imparting more suitable dispersibility. It should be noted that, in the present invention, the so-called "organosilicon-based dispersant" is a dispersant having a structure in which a hydrophilic substituent is introduced into a portion of an organosilicon having a siloxane bond in the main skeleton.

[0090] Here, the so-called "HLB (Hydrophilic-Lipophilic Balance) value" usually represents the affinity of a surfactant for water and oil, and is a parameter known as the hydrophilic-lipophilic balance, for example, it can be defined by the Griffin method. However, in the case of surfactants with an oxypropylene structure (including dispersants), it can be defined by the Kawakami method.

[0091] The HLB value of the dispersant involved in this invention, more specifically, can be 2.5 or higher, 2.6 or higher, 2.7 or higher, 2.8 or higher, 2.9 or higher, 3.0 or higher, 3.1 or higher, 3.2 or higher, 3.3 or higher, 3.4 or higher, 3.5 or higher, 3.6 or higher, 3.7 or higher, 3.8 or higher, 3.9 or higher, 4.0 or higher, 4.1 or higher, 4.2 or higher, 4.3 or higher, 4.4 or higher, 4.5 or higher, 4.6 or higher, 4.7 or higher, 4.8 or higher, 4.9 or higher, or 5.0 or higher. Alternatively, it can be 7.5 or lower, 7.4 or lower, 7.3 or lower, 7.2 or lower, or 7.1 or higher. Below, 7.0 and below, 6.9 and below, 6.8 and below, 6.7 and below, 6.6 and below, 6.5 and below, 6.4 and below, 6.3 and below, 6.2 and below, 6.1 and below, 6.0 and below, 5.9 and below, 5.8 and below, 5.7 and below, 5.6 and below, 5.5 and below, 5.4 and below, 5.3 and below, 5.2 and below, 5.1 and below, 5.0 and below, 4.9 and below, 4.8 and below, 4.7 and below, 4.6 and below, 4.5 and below, 4.4 and below, 4.3 and below, 4.2 and below, 4.1 and below, 4.0 and below, 3.8 and below, 3.7 and below, 3.6 and below, or 3.5 and below.

[0092] Additionally, amino-terminated polydimethylsiloxane dispersants are also known as aminoethylaminopropylmethylsiloxane·dimethylsiloxane copolymer dispersants, and preferably use, for example, compounds represented by the following formula (1):

[0093]

[0094] Here, the functional group equivalent of the compound of formula (1) can be 1000 or more, 1500 or more, or 2000 or more, or it can be 3000 or less, 2200 or less, 2000 or less, or 1800 or less. It should be noted that the so-called "functional group equivalent" refers to the value obtained by dividing the molecular weight of the compound of formula (1) by the number of amino groups contained in the molecule.

[0095] In addition, in formula (1), X is an alkyl group with 1 to 18 carbon atoms, R and R' are alkyl groups with 1 to 6 carbon atoms, m is 20 to 2000, and n is 1 to 100.

[0096] It should be noted that in this invention, the HLB value of the ammonia-terminated polydimethylsiloxane dispersant is not particularly limited. For example, it can be within the range of the HLB values ​​of the above-mentioned organosilicon dispersants (2.5 or more and 7.5 or less), or it can be an HLB value outside this range.

[0097] In the compositions of the present invention, the content of the dispersant involved in the present invention is not particularly limited. For example, relative to the total of 100 parts by weight of the surface-treated pigment particles (component (A)), the oil containing at least one type of silicone oil (component (B)), and the dispersant (component (C)) involved in this invention, the amount can be 0.5 parts by weight or more, 1.0 parts by weight or more, 1.5 parts by weight or more, 2.0 parts by weight or more, 2.5 parts by weight or more, 3.0 parts by weight or more, 3.5 parts by weight or more, 4.0 parts by weight or more, 4.5 parts by weight or more, 5.0 parts by weight or more, 5.5 parts by weight or more, 6.0 parts by weight or more, 6.5 parts by weight or more, 7.0 parts by weight or more, 7.5 parts by weight or more, 8.0 parts by weight or more, 8.5 parts by weight or more, 9.0 parts by weight or more, 9.5 parts by weight or more, 10 parts by weight or more, or 11 parts by weight or more. Alternatively, it can be 30 parts by weight or less, 25 parts by weight or less, 20 parts by weight or less, 15 parts by weight or less, or 12 parts by weight or less.

[0098] Furthermore, in the composition of the present invention, relative to 100 parts by mass of the pigment particles surface-treated with the ester compound involved in the present invention, the dispersant involved in the present invention may be, for example, 5.0 parts by mass or more, 8.0 parts by mass or more, 10 parts by mass or more, 11 parts by mass or more, 12 parts by mass or more, 13 parts by mass or more, 14 parts by mass or more, 15 parts by mass or more, 16 parts by mass or more, 17 parts by mass or more, 18 parts by mass or more, 19 parts by mass or more, 20 parts by mass or more, 25 parts by mass or more, 30 parts by mass or more, or 35 parts by mass or more. Alternatively, it may be 50 parts by mass or less, 45 parts by mass or less, 40 parts by mass or less, 35 parts by mass or less, 30 parts by mass or less, 25 parts by mass or less, or 20 parts by mass or less.

[0099] As specific examples of dispersants involved in this invention, there are no particular limitations as long as they are silicone-based dispersants or amino-terminated polydimethylsiloxane dispersants with an HLB value of 2.5 or higher and 7.5 or lower. The silicone-based dispersants with an HLB value of 2.5 or higher and 7.5 or lower involved in this invention may include at least one selected from, for example, polyether-modified silicones and polyether alkyl co-modified silicones. More specifically, examples of polyether-modified silicones include, for example, PEG-9 polydimethylsiloxane (HLB value: 3.8), but are not limited thereto. Examples of polyether alkyl co-modified silicones include, for example, cetyl PEG / PPG-10 / 1 polydimethylsiloxane (HLB value: 3.5 or 5.0) and lauryl PEG-9 polydimethylsiloxane (HLB value: 2.8), but are not limited thereto. According to one embodiment of the present invention, the polyether alkyl co-modified organosilicon can be cetyl PEG / PPG-10 / 1 polydimethylsiloxane. It should be noted that the HLB value of cetyl PEG / PPG-10 / 1 polydimethylsiloxane can vary depending on its structure. That is, substances with an HLB value of 3.5 and substances with an HLB value of 5.0 can exist as cetyl PEG / PPG-10 / 1 polydimethylsiloxane.

[0100] It should be noted that when two or more dispersants are used as the dispersants involved in this invention, it is preferable that the HLB value of each dispersant is in the range of 2.5 or more and 7.5 or less.

[0101] Cosmetics

[0102] The compositions of the present invention described above can be blended into various cosmetics. That is, the present invention can provide oil-based cosmetics containing the compositions of the present invention, water-in-oil emulsion cosmetics containing the compositions of the present invention, and oil-in-water emulsion cosmetics containing the compositions of the present invention.

[0103] The compositions of the present invention achieve both the dispersibility of pigment particles in oil and the absence of secondary adhesion. Therefore, cosmetics containing the compositions of the present invention can similarly achieve both the dispersibility of pigment particles in oil and the absence of secondary adhesion.

[0104] Furthermore, to the extent that it does not affect the effects of the present invention, various other ingredients may be appropriately blended into these cosmetics in addition to the compositions of the present invention described above. It should be noted that the presence and amount of other ingredients blended can be adjusted appropriately depending on the type of cosmetic.

[0105] Here, "other ingredients" is not particularly limited and can be any ingredients that can be commonly mixed in cosmetics. Examples include, for instance, water, surfactants other than the dispersants of the present invention described above, moisturizers, thickeners, gelling agents, stabilizers, water-soluble polymers, oil-soluble polymers, film-forming agents, higher fatty acids, metal ion blocking agents, lower alcohols, higher alcohols, various extracts, sugars, amino acids, organic amines, polymeric emulsions, chelating agents, other ultraviolet absorbers other than the polar oils described above, pH adjusters, skin nutrients, vitamins, water-soluble agents applicable in pharmaceuticals, quasi-pharmaceuticals, cosmetics, etc., buffers, anti-fading agents, preservatives, dispersants, propellants, powders other than the pigment particles of the present invention described above, and fragrances.

[0106] <Oil-based cosmetics>

[0107] In this invention, "oil-based cosmetic" refers to a cosmetic with a single-phase oil system. Furthermore, oil-based cosmetics typically do not contain water, which exists separately from the oil phase.

[0108] In the oil-based cosmetic of the present invention, the content of the composition of the present invention is not particularly limited. For example, it can be 80% or more by mass, 85% or more by mass, 90% or more by mass, 95% or more by mass, or 99% or more by mass. Alternatively, it can be 100% or less by mass, 99% or less by mass, 98% or less by mass, 97% or less by mass, 96% or less by mass, or 95% or less by mass.

[0109] In the oil-based cosmetic of the present invention, the content of oil containing at least one type of silicone oil is not particularly limited. For example, relative to the total oil-based cosmetic, it can be 1.0% or more by mass, 5.0% or more by mass, 10% or more by mass, 15% or more by mass, 20% or more by mass, 25% or more by mass, or 30% or more by mass. Alternatively, it can be 80% or less by mass, 75% or less by mass, 70% or less by mass, 65% or less by mass, 60% or less by mass, 55% or less by mass, 50% or less by mass, 45% or less by mass, 40% or less by mass, or 35% or less by mass.

[0110] In the oil-based cosmetic of the present invention, the content of the surface-treated pigment particles is not particularly limited. For example, relative to the total oil-based cosmetic, it can be 0.1% by mass or more, 0.5% by mass or more, 1.0% by mass or more, 1.5% by mass or more, 2.0% by mass or more, 2.5% by mass or more, 3.0% by mass or more, 3.5% by mass or more, 4.0% by mass or more, 4.5% by mass or more, 5.0% by mass or more, 5.5% by mass or more, 6.0% by mass or more, 6.5% by mass or more, 7.0% by mass or more, 7.5% by mass or more. 8.0% or more of mass, 8.5% or more of mass, 9.0% or more of mass, 9.5% or more of mass, 10% or more of mass, 11% or more of mass, 12% or more of mass, 13% or more of mass, 14% or more of mass, or 15% or more of mass. Alternatively, it can be 40% or less of mass, 38% or less of mass, 36% or less of mass, 34% or less of mass, 32% or less of mass, 30% or less of mass, 28% or less of mass, 26% or less of mass, 24% or less of mass, 22% or less of mass, 20% or less of mass, 18% or less of mass, or 16% or less of mass.

[0111] In the oil-based cosmetic of the present invention, the content of the dispersant involved in the present invention is not particularly limited. For example, relative to the total oil-based cosmetic, it can be 0.5% by mass or more, 1.0% by mass or more, 1.5% by mass or more, 2.0% by mass or more, 2.5% by mass or more, 3.0% by mass or more, 3.5% by mass or more, 4.0% by mass or more, 4.5% by mass or more, 5.0% by mass or more, 5.5% by mass or more, or 6.0% by mass or more. Alternatively, it can be 10% by mass or less, 9.5% by mass or less, 9.0% by mass or less, 8.5% by mass or less, 8.0% by mass or less, 7.5% by mass or less, 7.0% by mass or less, 6.5% by mass or less, 6.0% by mass or less, 5.5% by mass or less, 5.0% by mass or less, 4.5% by mass or less, 4.0% by mass or less, 3.5% by mass or less, or 3.0% by mass or less.

[0112] <Water-in-oil emulsified cosmetic>

[0113] The water-in-oil emulsion cosmetic of the present invention may contain the composition of the present invention in its continuous phase (external phase).

[0114] In the water-in-oil emulsion cosmetic of the present invention, the content of the composition of the present invention is not particularly limited. For example, it can be 30% or more by mass, 35% or more by mass, 40% or more by mass, 45% or more by mass, 50% or more by mass, 55% or more by mass, 60% or more by mass, 65% or more by mass, 70% or more by mass, 75% or more by mass, 80% or more by mass, 85% or more by mass, or 90% or more by mass. Alternatively, it can be less than 90% by mass, less than 85% by mass, less than 80% by mass, less than 75% by mass, less than 70% by mass, less than 65% by mass, less than 60% by mass, or less than 55% by mass.

[0115] In the water-in-oil emulsion cosmetic of the present invention, the water content is not particularly limited, and can be, for example, 5.0% or more by mass, 10% or more by mass, 15% or more by mass, 20% or more by mass, 25% or more by mass, or 30% or more by mass. Alternatively, it can be 65% or less by mass, 60% or less by mass, 55% or less by mass, 50% or less by mass, 45% or less by mass, 40% or less by mass, 35% or less by mass, 30% or less by mass, or 25% or less by mass.

[0116] In the water-in-oil emulsion cosmetic of the present invention, the content of oil containing at least one type of silicone oil is not particularly limited. For example, relative to the total water-in-oil emulsion cosmetic, it can be 10% or more by mass, 15% or more by mass, 20% or more by mass, 25% or more by mass, or 30% or more by mass. Alternatively, it can be 70% or less by mass, 65% or less by mass, 60% or less by mass, 55% or less by mass, 50% or less by mass, 45% or less by mass, 40% or less by mass, or 35% or less by mass.

[0117] In the water-in-oil emulsion cosmetic of the present invention, the content of the surface-treated pigment particles is not particularly limited. For example, relative to the total water-in-oil emulsion cosmetic, it can be 0.01% by mass or more, 0.05% by mass or more, 0.1% by mass or more, 0.5% by mass or more, 1.0% by mass or more, 1.5% by mass or more, 2.0% by mass or more, 2.5% by mass or more, 3.0% by mass or more, 3.5% by mass or more, 4.0% by mass or more, 4.5% by mass or more, 5.0% by mass or more, 5.5% by mass or more, 6.0% by mass or more, 6.5% by mass or more, 7.0% by mass or more, 7.5% by mass or more, or 8.0% by mass. The following percentages are acceptable: above 8.5%, above 9.0%, above 9.5%, above 10%, above 11%, above 12%, above 13%, above 14%, or above 15%. Alternatively, the following percentages are acceptable: below 50%, below 48%, below 46%, below 44%, below 42%, below 40%, below 38%, below 36%, below 34%, below 32%, below 30%, below 28%, below 26%, below 24%, below 22%, below 20%, below 18%, or below 16%.

[0118] In the water-in-oil emulsion cosmetic of the present invention, the content of the dispersant involved in the present invention is not particularly limited. For example, relative to the total water-in-oil emulsion cosmetic, it can be 0.01% by mass or more, 0.05% by mass or more, 0.1% by mass or more, 0.5% by mass or more, 1.0% by mass or more, 1.5% by mass or more, 2.0% by mass or more, 2.5% by mass or more, 3.0% by mass or more, 3.5% by mass or more, 4.0% by mass or more, 4.5% by mass or more, 5.0% by mass or more, or 5.5% by mass or more. Or 6.0% or more by mass, or 30% or less by mass, 25% or less by mass, 20% or less by mass, 15% or less by mass, 10% or less by mass, 9.5% or less by mass, 9.0% or less by mass, 8.5% or less by mass, 8.0% or less by mass, 7.5% or less by mass, 7.0% or less by mass, 6.5% or less by mass, 6.0% or less by mass, 5.5% or less by mass, 5.0% or less by mass, 4.5% or less by mass, 4.0% or less by mass, 3.5% or less by mass, or 3.0% or less by mass.

[0119] In the water-in-oil emulsion cosmetic of the present invention, the dispersant mentioned above can also function as an emulsifier. In addition, in order to maintain emulsion stability, it may also contain emulsifiers other than the above-mentioned dispersant.

[0120] <Water-in-oil emulsified cosmetic>

[0121] The water-in-oil emulsion cosmetic of the present invention may contain the composition of the present invention in its dispersed phase (internal phase).

[0122] In the oil-in-water emulsion cosmetic of the present invention, the content of the composition of the present invention is not particularly limited. For example, it can be 10% or more by mass, 15% or more by mass, 20% or more by mass, 25% or more by mass, 30% or more by mass, 35% or more by mass, 40% or more by mass, 45% or more by mass, 50% or more by mass, 55% or more by mass, 60% or more by mass, 65% or more by mass, or 70% or more by mass. Alternatively, it can be 80% or less by mass, 75% or less by mass, 65% or less by mass, 55% or less by mass, 50% or less by mass, or 45% or less by mass.

[0123] Furthermore, in the water-in-oil emulsion cosmetic of the present invention, the water content is not particularly limited. For example, it can be 30% or more by mass, 35% or more by mass, 40% or more by mass, 45% or more by mass, 50% or more by mass, 55% or more by mass, 60% or more by mass, 65% or more by mass, 70% or more by mass, 75% or more by mass, 80% or more by mass, or 85% or more by mass. Alternatively, it can be 90% or less by mass, 85% or less by mass, 75% or less by mass, 70% or less by mass, 65% or less by mass, 60% or less by mass, or 55% or less by mass.

[0124] In the oil-in-water emulsion cosmetic of the present invention, the content of the oil containing at least one type of silicone oil is not particularly limited. For example, relative to the total oil-in-water emulsion cosmetic, it can be 10% or more by mass, 15% or more by mass, 20% or more by mass, 25% or more by mass, or 30% or more by mass. Alternatively, it can be 70% or less by mass, 65% or less by mass, 60% or less by mass, 55% or less by mass, 50% or less by mass, 45% or less by mass, 40% or less by mass, or 35% or less by mass.

[0125] In the oil-in-water emulsion cosmetic of the present invention, the content of the surface-treated pigment particles is not particularly limited. For example, relative to the total oil-in-water emulsion cosmetic, it can be 0.1% by mass or more, 0.5% by mass or more, 1.0% by mass or more, 1.5% by mass or more, 2.0% by mass or more, 2.5% by mass or more, 3.0% by mass or more, 3.5% by mass or more, 4.0% by mass or more, 4.5% by mass or more, 5.0% by mass or more, 5.5% by mass or more, 6.0% by mass or more, 6.5% by mass or more, 7.0% by mass or more, or 7.5% by mass or more. % or more, 8.0% or more, 8.5% or more, 9.0% or more, 9.5% or more, 10% or more, 11% or more, 12% or more, 13% or more, 14% or more, or 15% or more. Alternatively, it can be 40% or less, 38% or less, 36% or less, 34% or less, 32% or less, 30% or less, 28% or less, 26% or less, 24% or less, 22% or less, 20% or less, 18% or less, or 16% or less.

[0126] In the oil-in-water emulsion cosmetic of the present invention, the content of the dispersant involved in the present invention is not particularly limited. For example, relative to the total oil-in-water emulsion cosmetic, it can be 0.5% by mass or more, 1.0% by mass or more, 1.5% by mass or more, 2.0% by mass or more, 2.5% by mass or more, 3.0% by mass or more, 3.5% by mass or more, 4.0% by mass or more, 4.5% by mass or more, 5.0% by mass or more, 5.5% by mass or more, or 6.0% by mass or more. Alternatively, it can be 20% by mass or less, 15% by mass or less, 10% by mass or less, 9.5% by mass or less, 9.0% by mass or less, 8.5% by mass or less, 8.0% by mass or less, 7.5% by mass or less, 7.0% by mass or less, 6.5% by mass or less, 6.0% by mass or less, 5.5% by mass or less, 5.0% by mass or less, 4.5% by mass or less, 4.0% by mass or less, 3.5% by mass or less, or 3.0% by mass or less.

[0127] The water-in-oil emulsion cosmetic of the present invention may also contain emulsifiers other than the dispersants mentioned above.

[0128] <Dosage Form>

[0129] Examples of dosage forms for cosmetics containing the compositions of the present invention include, but are not limited to, solid, semi-solid, solid cream, stick, emulsion, liquid, gel, smoothie, cream, ointment, or paste.

[0130] <Application>

[0131] Examples of uses for cosmetics containing the compositions of the present invention include, but are not limited to, foundation, blush, eyebrow pencil, eyeshadow, eyeliner, mascara, lipstick, primer, concealer, eye cream, and lip balm.

[0132] Example

[0133] The following examples illustrate the invention in more detail, but the invention is not limited to these examples. It should be noted that, unless otherwise specified, the content is expressed as a percentage by mass.

[0134] Examples and Comparative Examples

[0135] The oil-in-water emulsion cosmetics prepared according to the formulation examples and comparative examples shown in Table 1 below were evaluated for their dispersibility immediately after preparation, dispersibility over time, and the effect of no secondary adhesion according to the following criteria. The results are shown in Table 1.

[0136] Dispersion after initial modulation

[0137] The dispersion of each freshly prepared cosmetic material obtained in the examples and comparative examples was evaluated by visual inspection. It should be noted that the evaluation criteria are as follows:

[0138] “A”: No color unevenness is visible on the liquid surface;

[0139] “B”: Color unevenness is barely visible on the liquid surface;

[0140] "C": Uneven color was observed on about half of the liquid surface;

[0141] “D”: Uneven color was observed in more than half of the liquid surface.

[0142] It should be noted that the less "color unevenness" (or the fewer) on the liquid surface, the better the dispersibility. The same applies to the "dispersibility over time" below.

[0143] Dispersion over time

[0144] Rolling tests were conducted on the cosmetics obtained in the examples and comparative examples to evaluate their dispersibility over time.

[0145] More specifically, in the rolling test, the prepared cosmetic materials were filled into cylindrical containers and rotated at 45 rpm for 4 hours at room temperature using a rolling tester. The changes in the state of the cosmetic materials were observed. The evaluation criteria are as follows:

[0146] “A”: No changes were observed in the appearance of the cosmetic.

[0147] "B": The cosmetic showed slight discoloration, but this does not affect its use;

[0148] "C": The cosmetic has been observed to change color, indicating a degree that hinders its use;

[0149] “D”: Cosmetics exhibit significant discoloration and agglomeration, indicating a level of difficulty in use.

[0150] The effect of no secondary adhesion

[0151] Each cosmetic material obtained in the examples and comparative examples was applied to artificial leather at a dosage of 5 mg and left to stand at 37°C for 5 minutes. Then, the coated area was transferred by tapping the filter paper twice using a tapping tester. The transfer amount of each cosmetic material to the filter paper was visually evaluated based on the following criteria.

[0152] “A”: No transfer to the filter paper was observed at all;

[0153] “B”: Almost no transfer to the filter paper was observed;

[0154] “C”: Slight transfer to the filter paper was observed;

[0155] “D”: A clear transfer to the filter paper was observed.

[0156] [Table 1]

[0157]

[0158] [Table 2]

[0159]

[0160] As clearly shown in Table 1, the cosmetics of Examples 1-4 exhibit good uniform dispersibility (both immediately after preparation and after time) and good performance in preventing secondary adhesion. This demonstrates that the cosmetics of Examples 1-7 achieve a balance between the dispersibility of surface-treated pigment particles in oil and the prevention of secondary adhesion.

[0161] In contrast, it can be seen that although the cosmetics of Comparative Examples 1 and 2 used the same material as Examples 1 to 3 that was surface-treated with polyglycerol-2 tetraisostearate (an ester compound formed by fatty acids with 8 to 20 carbon atoms and glycerol) as pigment particles, they could not achieve both the dispersibility of surface-treated pigment particles in oil and the effect of no secondary adhesion.

[0162] More specifically, it can be seen that although the cosmetic material of Comparative Example 1 has good dispersibility when it is freshly prepared, its dispersibility deteriorates over time, and its effect of preventing secondary adhesion is also poor. It is speculated that this result is because the cosmetic material of Comparative Example 1 uses an organosilicon-based dispersant with an HLB value of 2.0.

[0163] Furthermore, although the amount of dispersant in Comparative Example 2 was increased, it exhibited the same tendency as Comparative Example 1. That is, while the cosmetic of Comparative Example 2 showed good dispersibility immediately after preparation, its dispersibility deteriorated over time, and it also failed to prevent secondary adhesion. This result is presumably due to the use of a silicone-based dispersant with an HLB value of 2.0 in the cosmetic of Comparative Example 2.

[0164] On the other hand, it can be seen that the cosmetic material in Comparative Example 3 did not use a dispersant. As a result, although the effect of no secondary adhesion was good, the dispersibility immediately after preparation and the dispersibility over time were both poor.

[0165] Comparative Example 4 cosmetics were mixed with the same oil and the same dispersant as in Example 1, but with pigment particles that had been surface-treated with a different surface treatment agent than in Example 1. The results showed that the dispersibility immediately after preparation and the dispersibility over time were good, but the effect of no secondary adhesion was poor.

[0166] Although the cosmetics in Comparative Examples 5 and 6 were mixed with the same oil and the same dispersant as in Example 1, they were mixed with pigment particles that had been surface-treated with a different surface treatment agent than in Example 1. As a result, the dispersibility was poor immediately after preparation and after a period of time, and the effect of no secondary adhesion could not be evaluated.

[0167] Although the cosmetic of Comparative Example 7 was mixed with the same oil as in Example 1, it was mixed with pigment particles that had been surface-treated with a different surface treatment agent than in Example 1 and a different dispersant. As a result, although the dispersibility was good when it was first prepared, the dispersibility and the effect of preventing secondary adhesion were poor after a period of time.

[0168] Comparative Example 8 used isostearic acid (a non-silicone dispersant) with an HLB value of 4.3 as a dispersant, resulting in poor dispersibility immediately after preparation and poor dispersibility over time, and the effect of preventing secondary adhesion could not be evaluated.

[0169] Prescription Examples

[0170] The following are illustrative examples of formulations of the compositions of the present invention. It should be noted that the present invention is not limited in any way by the following formulations.

[0171] <Prescription Example 1: Water-in-oil foundation>

[0172] [Table 3]

[0173]

[0174] <Prescription Example 2: Oily Solid Lipstick>

[0175] [Table 4]

[0176]

[0177] <Prescription Example 3: Oily Mascara>

[0178] [Table 5]

[0179]

[0180] <Prescription Example 4: Water-in-Oil Concealer>

[0181] [Table 6]

[0182] .

Claims

1. A cosmetic composition comprising the following ingredients: (A) Pigment particles surface-treated with ester compounds formed from fatty acids with 8-20 carbon atoms and glycerol; (B) Oils containing at least one type of silicone oil, and (C) At least one of the following: an organosilicon dispersant with an HLB value of 2.5 or higher and 7.5 or lower, and an amino-terminated polydimethylsiloxane dispersant.

2. The cosmetic composition according to claim 1, wherein the ester compound is selected from at least one of diglycerol tetraisostearate, diglycerol triisostearate, tri(caprylic / capric)glyceride, glycerol dilaurate, glycerol triisostearate, decaglycerol monoisostearate, and decaglycerol diisostearate.

3. The cosmetic composition according to claim 1 or 2, wherein the silicone-based dispersant comprises at least one selected from polyether-modified silicone and polyether alkyl co-modified silicone.

4. The cosmetic composition according to claim 3, wherein the polyether alkyl co-modified organosilicon is cetyl PEG / PPG-10 / 1 polydimethylsiloxane.

5. The cosmetic composition according to any one of claims 1 to 4, wherein the pigment particles comprise at least one selected from titanium dioxide, iron oxide yellow, iron oxide red, iron oxide black, talc, zinc oxide, silicon dioxide, pearlescent mica, mica, and sericite.

6. In the cosmetic composition according to any one of claims 1 to 5, the silicone oil accounts for 80% or more by mass in the total amount of oil.

7. The cosmetic composition according to any one of claims 1 to 6, wherein the surface-treated pigment particles are 5.0 to 50 parts by weight relative to a total of 100 parts by weight of the components (A), (B), and (C).

8. The cosmetic composition according to any one of claims 1 to 7, wherein the oil comprises 40 to 90 parts by weight relative to a total of 100 parts by weight of said component (A), said component (B) and said component (C).

9. The cosmetic composition according to any one of claims 1 to 8, wherein the component (C) is 0.5 to 30 parts by weight relative to a total of 100 parts by weight of the components (A), (B), and (C).

10. The cosmetic composition according to any one of claims 1 to 9, wherein the component (C) is 5.0 parts by weight or more relative to 100 parts by weight of the component (A).

11. An oily cosmetic comprising the cosmetic composition according to any one of claims 1 to 10.

12. A water-in-oil emulsion cosmetic, comprising the cosmetic composition according to any one of claims 1 to 10.

13. An oil-in-water emulsified cosmetic, comprising the cosmetic composition according to any one of claims 1 to 10.

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