JP5886599B2 - Cosmetic composition - Google Patents

Description

  The present invention relates to a lotion type cosmetic composition.

  Conventionally, lotion-type cosmetic compositions (for example, cleansing lotions and the like) are mainly composed of water (usually about 70 to 90% by weight of the total amount of the cosmetic composition), an oily component, and a surfactant. A blend of ingredients was provided. However, in recent years, there is a tendency for consumers to dislike the stickiness peculiar to oil components. On the other hand, cleansing lotions are required to have excellent detergency that can be used for washing highly hydrophobic cosmetics such as waterproof mascara.

  As a method for eliminating the stickiness of a cosmetic composition, a cleansing lotion that does not contain an oily component that causes stickiness has been provided. A cleansing lotion that does not contain an oil component has no stickiness and a refreshing feeling of use, but the cleaning power is reduced. When the amount of the surfactant is increased in order to improve detergency, not only the stickiness peculiar to the surfactant occurs, but also the skin irritation becomes strong and may cause inflammation. For this reason, it is difficult to combine detergency, usability, and safety.

  On the other hand, silicone oil is easily adapted to cosmetics when applied to the skin surface, and has a characteristic characteristic of oily components that allows the cosmetics to quickly rise from the skin surface, but does not have a sticky feeling like other oily components. Therefore, development of a cosmetic composition having a non-stickiness and an excellent detergency, in which silicone oil is blended as an oil component has been performed. However, since silicone oil is extremely difficult to solubilize in water and mixes with water, it has an opaque appearance and impairs aesthetics.Therefore, it has sufficient detergency for highly hydrophobic cosmetics such as waterproof mascara. It has been difficult to prepare a lotion-type cosmetic composition containing an amount of silicone oil that is sufficient to exhibit the above.

  As a method for solubilizing silicone oil without increasing the amount of surfactant, a method using an alcohol such as ethanol as a solubilizing aid together with a surfactant is known (Patent Document 1). However, alcohols with high solubilizing power (for example, ethanol) are strongly irritating and are therefore not suitable for blending into cosmetics. ) Was not suitable for blending into cosmetics because it caused the ability to inhibit self-assembly and made it difficult to form micelles.

JP 2003-226617 A

  Accordingly, an object of the present invention is to provide a lotion-type transparent cosmetic composition having no stickiness, excellent usability and excellent detergency.

  As a result of intensive studies to solve the above-mentioned problems, the present inventors remarkably improve the solubility of silicone oil in water when a hypoallergenic mono- or polyglycerin fatty acid ester having a specific structure is added to silicone oil. A low-irritant lotion-type cosmetic composition containing silicone oil, water and the surfactant, and containing 80.0% by weight or more of the water, The cosmetic composition contains a silicone oil that does not have a stickiness peculiar to an oily component as an oily component, and thus has an excellent detergency for highly hydrophobic cosmetics such as a waterproof mascara, There is no stickiness and excellent usability, and silicone oil is contained in O / W micelles that are stable by surfactants. Highly dispersed, to form a microemulsion, because the dispersion state is maintained, it was found to have a transparent appearance. The present invention has been completed based on these findings.

  That is, the present invention is a cosmetic composition containing mono- or polyglycerin fatty acid ester, silicone oil, and water, and the water content is 80.0% by weight or more of the total amount of the cosmetic composition. A cosmetic composition is provided.

As said mono- or polyglycerin fatty acid ester, following formula (1)
RC (= O) O- (C 3 H 6 O 2) n-H (1)
(In the formula, R represents a linear or branched aliphatic hydrocarbon group having 8 to 22 carbon atoms which may have a hydroxyl group. N represents the average degree of polymerization of glycerin, and 1 to 10. is there)
And a compound having an HLB value of 9.0 to 15.0 is preferred.

The content of mono- or polyglycerin fatty acid ester, silicone oil, and water relative to the total amount of the cosmetic composition is preferably in the following range.
Mono or polyglycerol fatty acid ester: 1.0 to 10.0% by weight
Silicone oil: 1.0 to 10.0% by weight
Water: 80.0-98.0% by weight

  Since the cosmetic composition according to the present invention contains, as an oil component, a silicone oil that does not have the stickiness peculiar to an oil component, it has an excellent detergency for highly hydrophobic cosmetics such as a waterproof mascara. It has an excellent feeling of use without stickiness. Since the silicone oil forms stable micelles by the surface-active action of low-irritating mono- or polyglycerin fatty acid esters and is highly dispersed in water, it can form a microemulsion, thus having a transparent appearance. And excellent safety. That is, the cosmetic composition according to the present invention is excellent in appearance, and is excellent in detergency, safety and usability, and therefore can be suitably used as a cleansing lotion.

[Mono or polyglycerin fatty acid ester]
The cosmetic composition of the present invention uses a mono- or polyglycerin fatty acid ester having low irritation and excellent safety as a surfactant. The mono- or polyglycerin fatty acid ester is represented by the following formula (1). In the formula (1), R represents a linear or branched aliphatic hydrocarbon group having 8 to 22 carbon atoms which may have a hydroxyl group. n represents the average degree of polymerization of glycerin and is 1 to 10 RC (= O) O— (C ₃ H ₆ O ₂ ) n—H (1)

C ₃ H ₆ O ₂ in parentheses in the formula (1) has both structures represented by the following formulas (2) and (3).
—CH ₂ —CHOH—CH ₂ O— (2)
—CH (CH ₂ OH) CH ₂ O— (3)

In the formula (1), R represents a linear or branched aliphatic hydrocarbon group having 8 to 22 carbon atoms which may have a hydroxyl group. Examples of the linear aliphatic hydrocarbon group having 8 to 22 carbon atoms include n-octyl, n-nonyl, n-decyl, n-undecyl, n-lauryl, n-tridecyl, n-tetradecyl, and n-pentadecyl. , N-palmityl, n-heptadecyl, n-stearyl, n-nonadecyl, n-eicosyl, n-heneicosyl, n-docosyl and the like C _8-22 straight chain alkyl groups; n-octenyl, n-nonenyl, n- Decenyl, n-undecenyl, n-dodecenyl, n-tridecenyl, n-tetradecenyl, n-pentadecenyl, n-hexadecenyl, n-heptadecenyl, n-elaidyl, n-oleyl, n-nonadecenyl, n-gadoleyl, n-eicosenyl, Examples thereof include C _8-22 linear alkenyl groups such as n-heneicosenyl and n-docosenyl groups.

  As the linear aliphatic hydrocarbon group having 8 to 22 carbon atoms having a hydroxyl group, one or more hydrogen atoms of the above linear aliphatic hydrocarbon group having 8 to 22 carbon atoms are substituted with a hydroxyl group. The group can be mentioned.

Examples of the branched aliphatic hydrocarbon group having 8 to 22 carbon atoms include isooctyl, s-octyl, t-octyl, isononyl, s-nonyl, t-nonyl, isodecyl, s-decyl, t-decyl, and isoundecyl. , S-undecyl, t-undecyl, isolauryl, s-lauryl, t-lauryl, isotridecyl, s-tridecyl, t-tridecyl, isotetradecyl, s-tetradecyl, t-tetradecyl, isopentadecyl, s-pentadecyl, t Pentadecyl, isopalmityl, 2-hexyldecyl, s-palmityl, t-palmityl, isoheptadecyl, s-heptadecyl, t-heptadecyl, isostearyl, s-stearyl, t-stearyl, isononadecyl, s-nonadecyl, t-nonadecyl, 2 -Octyl lauryl, iso ray Sill, s- eicosyl, t-eicosyl, iso Heng eicosyl, s- heneicosyl, t-heneicosyl, Isodokoshiru, s- docosyl, C _8-22 branched alkyl group such as t-docosyl group; isooctenyl, s- octenyl, t -Octenyl, isononenyl, s-nonenyl, t-nonenyl, isodecenyl, s-decenyl, t-decenyl, isoundecenyl, s-undecenyl, t-undecenyl, isododecenyl, s-dodecenyl, t-dodecenyl, isotridecenyl, s-tridecenyl, t -Tridecenyl, isotetradecenyl, s-tetradecenyl, t-tetradecenyl, isopentadecenyl, s-pentadecenyl, t-pentadecenyl, isohexadecenyl, s-hexadecenyl, t-hexadecenyl, isoheptadecenyl , S-heptade Senyl, t-heptadecenyl, isooleyl, s-oleyl, t-oleyl, isononadecenyl, s-nonadecenyl, t-nonadecenyl, isoeicosenyl, s-eicosenyl, t-eicosenyl, isoheneicosenyl, s-heneicosenyl, t-henecocenyl, Examples thereof include C _8-22 branched alkenyl groups such as isodocosenyl, s-docosenyl, and t-docosenyl groups.

  As the branched aliphatic hydrocarbon group having 8 to 22 carbon atoms and having a hydroxyl group, one or more hydrogen atoms of the branched aliphatic hydrocarbon group having 8 to 22 carbon atoms are substituted with a hydroxyl group. The group can be mentioned.

  The mono- or polyglycerin fatty acid ester of the present invention is a linear or branched alkyl group having 8 to 22 carbon atoms, in which R in formula (1) is excellent in the solubilizing power of silicone oil. In particular, a linear alkyl group having 8 to 22 carbon atoms (particularly 12 to 14 carbon atoms) such as an n-lauryl group and an n-myristyl group is particularly preferable.

  In formula (1), n shows the average degree of polymerization of glycerol, for example, 1-10, Preferably it is 1-5, Most preferably, it is 1-3. When the value of n is less than 1, the hydrophobicity increases and the water solubilizing power tends to decrease. On the other hand, when the value of n exceeds 10, the hydrophilicity increases and the solubilizing power to silicone oil tends to decrease.

  The HLB value of the mono- or polyglycerin fatty acid ester in the present invention is, for example, 9.0 to 15.0, preferably 9.0 to 13.0, and particularly preferably 9.0 to 12.0. When the HLB value is less than the above range, the hydrophobicity becomes too high, and the mono- or polyglycerin fatty acid ester tends to dissolve only in the silicone oil, making it difficult to dissolve in water. On the other hand, when the HLB value exceeds the above range, the hydrophilicity becomes too high, and the mono- or polyglycerin fatty acid ester tends to be soluble only in water and difficult to dissolve in silicone oil. For example, the HLB value can be increased by increasing the number of carbon atoms of the fatty acid residue, and can be increased by increasing the polymerization degree of the polyglycerol. Therefore, the HLB value can be adjusted by controlling the above molecular structure.

  Preferred examples of the mono- or polyglycerin fatty acid ester in the present invention include diglycerin monolaurate and diglycerin monomyristate. These can be used alone or in combination of two or more.

  In the present invention, for example, trade name “Poem DL-100” (diglycerin monolaurate, HLB: 9.4, manufactured by Riken Vitamin Co., Ltd.), trade name “Poem DM-100” (diglycerin monomyristate). Commercial products such as rate, HLB: 10.1, manufactured by Riken Vitamin Co., Ltd. can be preferably used.

[Silicone oil]
The silicone oil of the present invention may be at least a polysiloxane having a main chain composed of a siloxane bond, and may have a substituent at the end of the main chain and / or the side chain. The main chain may form a ring. Silicone oil includes straight silicone oil and modified silicone oil.

  The straight silicone oil is a polysiloxane whose main chain is composed of a siloxane bond, and when it has a substituent, the substituent is a methyl group and / or a phenyl group, and has no substituent other than a methyl group and a phenyl group. .

  The bonding position of the substituent in the straight silicone oil is not particularly limited, and both ends of the main chain (both ends type: represented by the following formula (4)) or one end (one end type: represented by the following formula (5) May be included in the side chain (side chain type: represented by the following formula (6)). Further, the side chain and both ends may have a substituent (side chain and both ends type: represented by the following formula (7)), and the side chain and one end may have a substituent. Good (side chain and single-end type: represented by the following formula (8)). All side chains and terminals may be substituted with methyl groups (represented by the following formula (9)). The compounds represented by the following formulas (6) to (8) may be any of random copolymers, alternating copolymers, block copolymers, and the like.

X ¹ , X ² and X ³ in the above formula are a hydrogen atom or a phenyl group, and m and n are integers of 1 or more. X ¹ , X ² and X ³ may be the same or different. m and n may also be the same or different.

  Specific examples of the straight silicone oil include all side chains, dimethyl silicone having a terminal methyl group, and cyclic dimethyl silicone in which the dimethyl silicone forms a ring, methyl phenyl having a phenyl group in a part of the side chain. Examples thereof include silicone and methyl hydrogen silicone in which a part of the side chain is hydrogen. In the present invention, among them, cyclopentasiloxane, diphenylsiloxyphenyl trimethicone and the like are preferable because they have excellent detergency and can further suppress the sticky feeling. For example, the trade name “FK-995” (cyclo Commercially available products such as pentasiloxane, manufactured by Shin-Etsu Silicone Co., Ltd., and trade name “KF-56A” (diphenylsiloxyphenyl trimethicone, manufactured by Shin-Etsu Silicone Co., Ltd.) can be suitably used.

  The modified silicone oil is a polysiloxane having a main chain composed of a siloxane bond, and has a substituent other than a methyl group and a phenyl group. The bonding position of the substituent in the modified silicone oil is not particularly limited. Both ends of the main chain (both ends type: represented by the following formula (10)) or one end (one end type: the following formula (11) May be included) or in a side chain (side chain type: represented by the following formula (12)). Further, the side chain and both ends may have a substituent (side chain and both ends type: represented by the following formula (13)), and the side chain and one end may have a substituent. Good (side chain and single terminal type: represented by the following formula (14)). The compounds represented by the following formulas (12) to (14) may be any of random copolymers, alternating copolymers, block copolymers, and the like.

In the above formula, X ⁴ , X ⁵ and X ⁶ are substituents (other than methyl group and phenyl group), and m ′ and n ′ are integers of 1 or more. X ⁴ , X ⁵ and X ⁶ may be the same or different. m ′ and n ′ may also be the same or different.

Examples of the substituent other than the methyl group and the phenyl group in X ⁴ , X ⁵ and X ⁶ in the above formula include, for example, an alkyl group having 2 or more carbon atoms, an aralkyl group, an epoxy group, a fluorine atom, an amino group, a carboxyl group, Examples include aliphatic hydroxyl groups (alcoholic hydroxyl groups), aromatic hydroxyl groups other than phenyl groups (phenolic hydroxyl groups), (meth) acryloyl group-containing substituents, substituents containing polyether chains, and the like.

  Among the modified silicone oils in the present invention, among them, a modified silicone oil having an alkyl group having 2 or more carbon atoms as a substituent is preferable because it can further improve the detergency. Modified silicone oils having -18 linear or branched alkyl groups (specifically, lauryl group, cetyl group, etc.) in the side chain are preferred. In the present invention, for example, commercial names such as “SS-3408” (caprylylmethicone, manufactured by Toray Dow Corning Co., Ltd.), “2502 Cosmetic Fluid” (cetyl dimethicone, manufactured by Toray Dow Corning Co., Ltd.), etc. The product can be suitably used.

  Examples of the silicone oil in the present invention include a trade name “KF-995” (cyclopentasiloxane, manufactured by Shin-Etsu Silicone Co., Ltd.) and a trade name “KF-56A” (diphenylsiloxyphenyl trimethicone, manufactured by Shin-Etsu Silicone Co., Ltd.). ) Straight silicone oils, trade names such as “SS-3408” (caprylyl methicone, manufactured by Toray Dow Corning Co., Ltd.), “2502 Cosmetic Fluid” (cetyl dimethicone, manufactured by Toray Dow Corning Co., Ltd.), etc. A side chain type alkyl-modified silicone oil or the like can be preferably used. These can be used alone or in combination of two or more.

[Cosmetic composition]
The cosmetic composition of the present invention is a cosmetic composition containing mono- or polyglycerin fatty acid ester, silicone oil, and water, and the water content is 80.0% by weight based on the total amount of the cosmetic composition. It is the above.

  The amount of water in the cosmetic composition of the present invention is 80.0% by weight or more of the total amount of the cosmetic composition, for example, about 80.0-98.0% by weight, preferably 85.5-94. About 5% by weight, particularly preferably about 87.0-92.0% by weight. If the amount of water exceeds the above range, the solubilizing power becomes insufficient, the transparency of the cosmetic composition tends to decrease, and the cleaning power tends to decrease. On the other hand, if the amount of water falls below the above range, the amount of mono- or polyglycerin fatty acid ester is relatively increased, which is not only uneconomical, but also increases stickiness and skin irritation, resulting in a feeling of use. And the safety tends to be reduced.

  The blending amount of the mono- or polyglycerin fatty acid ester in the cosmetic composition of the present invention is, for example, about 1.0 to 10.0% by weight of the total amount of the cosmetic composition, preferably 3.0 to 7. About 5% by weight, particularly preferably about 4.5 to 7.5% by weight, and most preferably about 5.5 to 7.5% by weight. If the blending amount of the mono- or polyglycerin fatty acid ester is below the above range, the solubilizing power becomes insufficient and the transparency of the cosmetic composition tends to be lowered. Moreover, it becomes difficult to mix | blend a sufficient quantity of oil-based component in order to ensure detergency, and there exists a tendency for detergency to fall. On the other hand, when the blending amount of mono- or polyglycerin fatty acid ester exceeds the above range, not only is it uneconomical, but also stickiness and skin irritation increase, and the feeling of use and safety tend to decrease.

  The blending amount of the silicone oil in the cosmetic composition of the present invention is, for example, about 1.0 to 10.0% by weight, preferably about 2.5 to 7.0% by weight of the total amount of the cosmetic composition. Particularly preferably, it is about 3.5 to 5.5% by weight, most preferably about 3.5 to 4.5% by weight. If the blending amount of the silicone oil is below the above range, the detergency tends to decrease. On the other hand, when the blending amount of the silicone oil exceeds the above range, solubilization becomes difficult, and the transparency of the cosmetic composition tends to decrease. Also, the cleaning power tends to decrease.

  In addition to mono- or polyglycerin fatty acid ester, silicone oil, and water, the cosmetic composition according to the present invention contains other additives as required, such as amphoteric surfactants and nonionic surfactants. You may mix | blend. By blending these, the skin feel can be improved.

  The amphoteric surfactant is not particularly limited as long as it is used in a normal cosmetic composition, and examples thereof include carbobetaine-based active agents, amide betaine-based active agents, sulfobetaine-based active agents, Examples include betaine activators, imidazolium betaine activators, amine oxide activators, and the like.

The nonionic surfactant is not particularly limited as long as it is used in ordinary cosmetic compositions. For example, polyoxyethylene fatty acid ester, polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbitan Fatty acid ester, C _8-12 fatty acid monoglyceride, glycerin monoalkyl ether, polyoxyethylene alkyl ether, polyoxyethylene polyoxypropylene glycol, coconut oil fatty acid diethanolamide, C _6-24 fatty acid diethanolamide, C _6-24 fatty acid monoethanol Examples thereof include amides and alkyl saccharide surfactants.

  The cosmetic composition according to the present invention further includes components used in normal cosmetic compositions, for example, viscosity modifiers such as anionic, nonionic, and cationic polymers; moisturizing components such as polyols. Oils such as squalane, jojoba oil, olive oil, higher alcohols, lanolin, esters, etc .; amides, foaming agents, preservatives, water-soluble polymers, pH adjusters, UV absorbers, pearling agents, antioxidants, fragrances, A pigment | dye etc. can be mix | blended suitably in the range which does not impair the effect of this invention.

  The cosmetic composition of the present invention comprises the above mono- or polyglycerin fatty acid ester, silicone oil, water (for example, distilled water, purified water, industrial purified water, deionized water, etc.), and other additives as necessary. It can be produced by mixing and stirring the product.

  In the cosmetic composition of the present invention, extremely small micelles containing a high amount of silicone oil are formed by the surface-active action of mono- or polyglycerin fatty acid esters, and silicone oil is highly dispersed in water [= oil-in-water type] (Because (O / W type) microemulsion is formed], a cosmetic composition having transparency and a beautiful appearance is obtained.

  The maximum particle size of micelles contained in the cosmetic composition of the present invention is, for example, 1 μm or less, preferably 500 nm or less, particularly preferably 100 nm or less. The maximum particle size of the micelle can be measured using a nanotrack particle size analyzer.

  In addition, since the cosmetic composition according to the present invention contains silicone oil as an oil component, it has excellent detergency for cosmetics with high hydrophobicity (for example, waterproof mascara, lipstick, foundation, etc.). Have. In addition, the silicone oil has no stickiness peculiar to oily components, and thus has a good feeling of use. Furthermore, the mono- or polyglycerin fatty acid ester used as a surfactant is hypoallergenic and has excellent solubilizing power, so that silicone oil can be solubilized in water with a small amount of use. A lotion-type cosmetic composition having high safety and transparency can be formed. The cosmetic composition according to the present invention has excellent detergency, safety, usability, and beautiful appearance, and thus is useful as a cleansing lotion, lotion, and the like.

  In particular, when the cosmetic composition according to the present invention is used as a cleansing lotion, for example, for use in wiping cosmetics (for example, cosmetics with high hydrophobicity such as waterproof mascara) contained in cotton or the like. It can be preferably used. The skin after use is not sticky and does not need to be washed away. Therefore, it can be used even in the absence of water and can be used very easily.

  EXAMPLES Hereinafter, although an Example demonstrates this invention more concretely, this invention is not limited by these Examples.

Example A cosmetic composition was produced by a conventional method using the composition (wt%) shown in Table 1 below, and the transparency and detergency were evaluated by the following methods.

[transparency]
The particle size distribution of each cosmetic composition obtained in the examples was measured using a nanotrack particle size analyzer (trade name “UPA-EX150 / UPA-EX-250”, manufactured by Nikkiso Co., Ltd.), and the transparency Were evaluated according to the following criteria.
Evaluation criteria ○: Maximum particle size is 100 nm or less △: Maximum particle size exceeds 100 nm and less than 10 μm

[Detergency]
Mascara (trade name “Volume Express Turbo Boost N Waterproof (Black)”, manufactured by Maybelline New York) 0.1 g was applied to the upper arm and dried using a dryer for 30 minutes.
Each cosmetic composition 2 mL obtained in the Examples was soaked in cotton and allowed to acclimate to the mascara applied to the upper arm for 1 minute, then wiped off 5 times, and the detergency was evaluated from the degree of mascara drop according to the following criteria. .
Evaluation criteria ○: Completely dropped △: Almost dropped ×: Drop was insufficient

The above results are summarized in the following table.

Claims (2)

A cosmetic composition containing mono- or polyglycerin fatty acid ester, silicone oil, and water ,
The mono- or polyglycerin fatty acid ester is represented by the following formula (1)
RC (= O) O- (C 3 H 6 O 2) n-H (1)
(In the formula, R represents a linear or branched aliphatic hydrocarbon group having 8 to 22 carbon atoms which may have a hydroxyl group. N represents the average degree of polymerization of glycerin, and 1 to 10. is there)
A compound having an HLB value of 9.0 to 15.0,
The silicone oil is a cleaning component and is solubilized in a cosmetic composition,
The content of the water is Ri der 80.0 wt% or more of the cosmetic for the total amount of the composition,
Contains no acrylic acid polymer and water-insoluble and film-forming emulsion polymer,
A cosmetic composition which is a cleansing lotion . The cosmetic composition according to claim 1, wherein the content of the mono- or polyglycerin fatty acid ester, silicone oil, and water relative to the total amount of the cosmetic composition is in the following range.
Mono or polyglycerol fatty acid ester: 1.0 to 10.0% by weight
Silicone oil: 1.0 to 10.0% by weight
Water: 80.0-98.0% by weight