JP5964049B2 - Stick emulsified cosmetic - Google Patents

Description

  The present invention relates to a stick-like emulsified cosmetic.

  Stick cosmetics have been used because of their ease of use and good portability. Conventionally, oily cosmetics composed of an oily component and a wax component have been widely used as stick-like cosmetics (Patent Document 1), but they tend to give the skin a heavy feel derived from the oily component. Therefore, a stick-like emulsified cosmetic with a good feeling of use has been developed using an aqueous component and an emulsifier and further using a volatile silicone oil as an oil component (Patent Document 2).

JP 2009-234992 A JP-A 63-227516

  However, in order to give UV-protective effects to stick-type emulsified cosmetics, trying to add a high amount of UV absorbers such as octyl paramethoxycinnamate is not compatible with silicone oil, so the emulsion stability decreases. There was a problem to do. Further, even when an ultraviolet scattering agent such as fine particle titanium oxide was blended in a high amount, the stability of emulsification was lowered and the breaking strength was further lowered, so that a satisfactory quality could not be obtained.

  Therefore, the present invention provides a stick-type emulsified cosmetic that has an ultraviolet protection effect and has good stability without deterioration such as separation and strength reduction even after long-term storage, and excellent in feeling of use. The task is to do.

  The present inventor, in view of the above circumstances, as a result of earnest research, in a system with a high blend of volatile silicone oil, blend the ultraviolet absorber and an oil component having an IOB value within a specific range at a specific ratio, Furthermore, it discovered that the stick-shaped emulsification cosmetics which solve said subject were obtained by mix | blending combining a ultraviolet-ray-scattering agent and polymethylsilsesquioxane, and completed this invention.

That is, this invention contains the following component (a)-(e), content of a component (a) is 1-6 mass% with respect to cosmetics total amount, and content of a component (e) is cosmetics. 15 to 40% by mass with respect to the total amount of ingredients, and the mass ratio of component (a) to component (b) is (a) :( b) = 1: 1 to 1: 3 The emulsified cosmetic is provided.
(A) Ultraviolet absorber (b) Oily component having an IOB value of 0.2 to 0.45 (c) Ultraviolet scattering agent (d) Polymethylsilsesquioxane (e) Volatile silicone oil

  According to the present invention, there is provided a stick-type emulsified cosmetic which has an excellent UV protection effect, has good stability without being deteriorated even after long-term storage, and has good stability and excellent usability. can do.

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

  The (a) ultraviolet absorber used in the present invention may be either one having ultraviolet absorbing ability in the UVA region or one having ultraviolet absorbing ability in the UVB region. Examples of those having UV absorbing ability in the UVA region include 2-ethylhexyl dimethoxybenzylidenedioxoimidazolidinepropionate, bisethylhexyloxyphenol methoxyphenyltriazine, hexyl diethylaminohydroxybenzoylbenzoate, 4-tert-butyl-4′-methoxydi Examples include benzoylmethane. Examples of those having UV-absorbing ability in the UVB region include octyl paramethoxycinnamate, 2-ethylhexyl 2-cyano-3,3-diphenyl acrylate, 2-ethylhexyl paradimethylaminobenzoate, octyl salicylate, and the like. It is preferable to use octyl paramethoxycinnamate from the viewpoints of emulsion stability, feeling of use, and the like. Commercially available products include parasol 1789 (4-tert-butyl-4′-methoxydibenzoylmethane; manufactured by Roche), soft shade DH (dimethoxybenzylidenedioxoimidazolidinepropionate 2-ethylhexyl; manufactured by Ajinomoto Co.), Chinosorb S (Bisethylhexyloxyphenol methoxyphenyl triazine; manufactured by BASF), ubinal Aplus (hexyl diethylaminohydroxybenzoyl benzoate; manufactured by BASF), ubinal MC-80 (octyl paramethoxycinnamate; manufactured by BASF), ubi null N539 (2 -Ethylhexyl 2-cyano-3,3-diphenylacrylate; manufactured by BASF), Escalol 507 (2-ethylhexyl paradimethylaminobenzoate; manufactured by ISP), Escalol 587 Ethylhexyl chill acid; ISP Corp.), and the like.

  Content of the component (a) used by this invention is 1-6 mass% with respect to cosmetics total amount, Preferably it is 2-5 mass%. By containing in this range, sufficient ultraviolet-ray protective effect is acquired, and the effect excellent in emulsification stability, a feeling of use, etc. is acquired.

  The (b) oily component used in the present invention excludes the component (a), has an IOB value of 0.2 to 0.45, and is a liquid higher alcohol that is liquid at room temperature (25 ° C.). Ester oil is preferably used. Examples of the higher alcohol having an IOB value of 0.2 to 0.45 include octyldodecanol (0.26) and isostearyl alcohol (0.29), and esters having an IOB value of 0.2 to 0.45. As oil, isononyl isononanoate (0.2), tri (capryl / capric acid) glyceryl (0.30), propylene glycol dicaprylate (0.32), glyceryl tri-2-ethylhexanoate (0.35), Di-2-ethylhexanoic acid neopentyl glycol (0.32), octyldodecyl lactate (0.36), propylene glycol oleate (0.39), propylene glycol isostearate (0.40), diethyl sebacate ( 0.43), diisopropyl sebacate (0.40) and the like.

  In the present invention, the IOB value is an abbreviation of Inorganic / Organic Balance (inorganic / organic ratio), and is a value representing the ratio of the inorganic value to the organic value, and the degree of polarity of the organic compound. It is an indicator to show. Specifically, the IOB value is expressed as IOB value = inorganic value / organic value. Here, for each of the “inorganic value” and “organic value”, for example, “organic value” is 20 for one carbon atom in the molecule, and “inorganic value” is 100 for one hydroxyl group. As described above, “inorganic value” and “organic value” corresponding to various atoms or functional groups are set, and “inorganic value” and “organic value” of all atoms and functional groups in the organic compound. Can be calculated to calculate the IOB value of the organic compound (see, for example, Yoshio Koda, “Organic Conceptual Diagram—Basics and Applications” p11-17, published by Sankyo Publishing 1984).

  As for content of the component (b) used by this invention, 1-18 mass% is preferable with respect to cosmetics total amount, More preferably, it is 2-15 mass%, More preferably, it is 2-10 mass%. By containing in this range, the effect excellent in emulsion stability, a usability | use_condition, long-term storage stability, etc. is acquired.

  The content ratio of component (a) and component (b) used in the present invention is 1: 1 to 1: 3, preferably 1: 1 to 1: 2. By containing in this range, the effect excellent in emulsion stability, a usability | use_condition, long-term storage stability, etc. is acquired.

Examples of the ultraviolet scattering agent (c) used in the present invention include titanium oxide, zinc oxide and the like, and fine particle titanium oxide having an average particle diameter of 0.1 μm or less and an average particle diameter from the viewpoint of ultraviolet protective effect and transparency. Fine zinc oxide or the like having a particle size of 0.1 μm or less is preferably used, and fine particle titanium oxide is particularly preferably used. In the present invention, the average particle diameter (mass average particle diameter) can be measured using an image analysis apparatus, with the primary particle diameter being the tangential diameter of the Feret fixed direction of an image taken with a scanning electron microscope. In addition, the shape of titanium oxide and zinc oxide may be any of plate shape, needle shape, spherical shape, and the like, and a hydrous oxide of at least one element selected from the group consisting of Al, Si, Zr, Ti, Zn and / or Surface treatments such as those coated with oxides, and further silicon treatment, silane treatment, metal soap treatment, fluorine treatment, amino acid treatment, organic titanate treatment and the like may be performed.
Commercially available products include TTO-51, TTO-55 (all manufactured by Ishihara Sangyo Co., Ltd.), MT-500SA, MT-600B (both manufactured by Teika), FINEX-25, FINEX-50, and FINEX-75 (all Chemical Co., Ltd.), MZ500 series, MZ700 series (both manufactured by Teika) and the like. The lower limit of the average particle diameter is not particularly limited, but is preferably 0.001 μm.

  As for content of the component (c) used by this invention, 1-10 mass% is preferable with respect to cosmetics total amount, More preferably, it is 2-8 mass%, More preferably, it is 4-6 mass%. By containing in this range, sufficient ultraviolet-ray protective effect is acquired, and the effect excellent in emulsification stability, hardness, usability, etc. is acquired.

  (D) Polymethylsilsesquioxane used in the present invention is a spherical powder obtained by emulsion polymerization of methyltrimethoxysiloxane in an alkaline aqueous solution, and a commercially available product is manufactured by Momentive Performance Materials Japan. And Tospearl series (Tospearl 145A etc.).

  As for content of the component (d) used by this invention, 2-10 mass% is preferable with respect to cosmetics total amount, More preferably, it is 2-8 mass%, More preferably, it is 2-4 mass%. By containing in this range, the effect excellent in hardness, usability, etc. is acquired.

  The content of the component (c) used in the present invention is preferably 40 to 70% by mass with respect to the total amount of the powder, and the content of the component (d) is 20 to 50% by mass with respect to the total amount of the powder. Preferably there is. By containing in this range, sufficient ultraviolet-ray protective effect is acquired, and the effect excellent in emulsification stability, hardness, usability, etc. is acquired.

The (e) volatile silicone oil used in the present invention is a silicone oil having volatility at room temperature (25 ° C.) and can be used without particular limitation as long as it is generally used in cosmetics. formula _{(CH 3) 3 SiO - [} (CH 3) 2 SiO] n -Si (CH 3) 3 linear dimethylpolysiloxane represented by (n = 0 to 5), octamethylcyclotetrasiloxane, decamethyl Cyclic silicones having a polymerization degree of 3 to 7 such as cyclopentasiloxane and dodecamethylcyclohexasiloxane, methyltrimethicone represented by the general formula [(CH ₃ ) ₃ SiO] ₃ SiCH ₃ , and the general formula [(CH ₃ ) ₃ SiO ] tetraquistrimethylsiloxysilane like represented by ₄ Si.

  Content of the component (e) used by this invention is 15-40 mass% with respect to cosmetics total amount, Preferably it is 20-35 mass%. By containing in this range, the effect excellent in emulsification stability, hardness, usability, moisture retention, etc. is acquired.

  In addition to the above ingredients, the stick-like emulsified cosmetic of the present invention is preferably water-in-oil emulsified by blending water, a surfactant and a wax. 5-40 mass% is preferable with respect to cosmetics total amount, and, as for content of water, More preferably, it is 10-35 mass%. As the surfactant, a nonionic surfactant having an HLB value of 7 or less is preferable, and specifically, polyglycerol fatty acid ester, sorbitan fatty acid ester, and the like are preferable. As for content of surfactant, 0.1-5 mass% is preferable with respect to cosmetics whole quantity, More preferably, it is 0.5-3 mass%. As the wax, hydrocarbon waxes such as paraffin wax, polyethylene wax, microcrystalline wax, ceresin, ozokerite and Fischer-Tropsch wax are preferable. The content of the wax is preferably 5 to 30% by mass, more preferably 10 to 20% by mass with respect to the total amount of the cosmetic.

  In addition to the above components, the stick-like emulsified cosmetic of the present invention includes zirconium oxide, cerium oxide, magnesium oxide, barium sulfate, calcium sulfate, magnesium sulfate, calcium carbonate, and magnesium carbonate as long as the object of the present invention is not impaired. , Talc, mica, kaolin, sericite, silicic acid, anhydrous silicic acid, aluminum silicate, magnesium silicate, magnesium aluminum silicate, calcium silicate, barium silicate, strontium silicate, metal tungstate, hydroxyapatite, Vermiculite, hydrite, bentonite, montmorillonite, hectorite, zeolite, ceramic powder, dicalcium phosphate, alumina, aluminum hydroxide, boron nitride, boron nitride, etc. or white pigment, iron oxide, water Inorganic red pigments such as iron fluoride and iron titanate, inorganic brown pigments such as γ-iron oxide, inorganic yellow pigments such as yellow iron oxide and loess, inorganic black pigments such as black iron oxide and carbon black, manganese violet, Inorganic purple pigments such as cobalt violet, inorganic green pigments such as chromium hydroxide, chromium oxide, cobalt oxide and cobalt titanate, inorganic blue pigments such as bitumen and ultramarine, fish scale foil, titanium oxide-coated mica (titanium mica), oxy Bismuth chloride, titanium oxide coated bismuth oxychloride, titanium oxide coated talc, titanium oxide coated colored mica, low order titanium oxide coated mica, mica, titanium oxide coated synthetic mica, titanium oxide coated plate silica, hollow plate titanium oxide, oxidation Iron-coated mica, plate-like iron oxide (MIO), aluminum flakes, stainless steel flakes, titanium oxide-coated plate-like alumina, pearl shell, gold Pearl pigments such as foil, gold-deposited resin film, metal-deposited resin film, amino acid-based powder such as lauroyl lysine, oily gelling agent such as dextrin palmitate, inulin stearate, 12-hydroxystearic acid Thickeners such as copolymers, (styrene / isoprene) copolymers, (ethylene / propylene / styrene) copolymers, (butylene / ethylene / styrene) copolymers, petrolatum, phytosteryl oleate, dimerlinoleic acid hydrogenated castor oil, tetra (behen) Acid / benzoic acid / ethylhexanoic acid) pentaerythrityl, dimer linoleic acid (phytosteryl / isostearyl / cetyl / stearyl / behenyl), lauroylglutamate di (phytosteryl / octyl / behenyl), etc. Liquid oil components such as lysobutene, squalane, non-volatile dimethylpolysiloxane, methylphenylpolysiloxane, organics such as red 104, red 102, red 226, red 201, red 202, yellow 4 and black 401 Pigments and their lakes, organopolysiloxane elastomer spherical powder, nylon powder, silk powder, urethane powder, polymethyl methacrylate powder, cellulose powder, polymers such as alkyl acrylate copolymer, paraben, sodium dehydroacetate, phenoxyethanol, chloro Preservatives such as phenescine and 1,2-alkanediol, wetting agents such as 1,3-butylene glycol, propylene glycol, dipropylene glycol, glycerin, sorbitol and maltitol, fragrance, and plant extraction It can be incorporated an antioxidant, a pH adjusting agent or the like.

  The stick-like emulsified cosmetic of the present invention is obtained by molding a semi-finished product obtained by emulsifying each of the above components into a stick shape. The emulsification method is not particularly limited and can be carried out by a usual method.

  The stick-type emulsified cosmetic of the present invention has a high UV protection effect and a feeling of use. In addition to UV protection cosmetics, base makeup such as eye cream, makeup base, concealer, foundation, etc. It can be suitably used as a cosmetic or the like.

This invention discloses the following cosmetics further regarding embodiment mentioned above.
The present invention is the following cosmetic <1>.
<1> The following components (a) to (e) are contained, the content of the component (a) is 1 to 6% by mass relative to the total amount of the cosmetic, and the content of the component (e) is the total amount of the cosmetic. 15 to 40% by mass, and the mass ratio of component (a) to component (b) is (a) :( b) = 1: 1 to 1: 3 Fee.
(A) Ultraviolet absorber (b) Oily component having an IOB value of 0.2 to 0.45 (c) Ultraviolet scattering agent (d) Polymethylsilsesquioxane (e) Volatile silicone oil

The present invention preferably further comprises the following cosmetics.
<2> The stick-like emulsified cosmetic according to <1>, wherein the component (a) is octyl paramethoxycinnamate.
<3> The stick-like emulsified cosmetic according to <1> or <2>, wherein the content of the component (a) is 2 to 5% by mass with respect to the total amount of the cosmetic.
<4> Any of <1> to <3>, wherein the component (b) has an IOB value of 0.2 to 0.45, and is a higher alcohol and / or ester oil that is liquid at room temperature (25 ° C.) The stick-like emulsified cosmetic according to the above.
<5> Component (b) is octyldodecanol, isostearyl alcohol, isononyl isononanoate, tri (capryl / capric acid) glyceryl, propylene glycol dicaprylate, glyceryl tri-2-ethylhexanoate, di-2-ethylhexanoic acid Any one or two or more kinds selected from neopentyl glycol, octyldodecyl lactate, propylene glycol oleate, propylene glycol isostearate, diethyl sebacate, and diisopropyl sebacate are described in any one of <1> to <4> Stick emulsified cosmetics.
<6> The content of the component (b) is 1 to 18% by mass, preferably 2 to 15% by mass, and more preferably 2 to 10% by mass with respect to the total amount of cosmetics <1> to <5> The stick-like emulsified cosmetic according to any one of the above.
<7> The stick-shaped emulsified cosmetic according to any one of <1> to <6>, wherein the content ratio of the component (a) to the component (b) is 1: 1 to 1: 2.
<8> The component (c) is fine particle titanium oxide and / or fine particle zinc oxide having an average particle size of 0.1 μm or less, preferably fine particle titanium oxide, according to any one of <1> to <7>. Stick emulsified cosmetic.
<9> The content of the component (c) is 1 to 10% by mass, preferably 2 to 8% by mass, and more preferably 4 to 6% by mass with respect to the total amount of cosmetics <1> to <8> The stick-like emulsified cosmetic according to any one of the above.
<10> The content of the component (d) is 2 to 10% by mass, preferably 2 to 8% by mass, and more preferably 2 to 4% by mass with respect to the total amount of cosmetics <1> to <9> The stick-like emulsified cosmetic according to any one of the above.
<11> The content of the component (c) is 40 to 70% by mass with respect to the total amount of the powder, and the content of the component (d) is 20 to 50% by mass with respect to the total amount of the powder < The stick-like emulsified cosmetic according to any one of 1> to <10>.
<12> component (e) has the general formula _{(CH 3) 3 SiO - [} (CH 3) 2 SiO] n -Si (CH 3) 3 linear dimethylpolysiloxane represented by (n = 0 to 5) Cyclic silicones having a degree of polymerization of 3 to 7 such as siloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, and the like, methyltrimethicone represented by the general formula [(CH ₃ ) ₃ SiO] ₃ SiCH ₃ And a sticky emulsified makeup according to any one of <1> to <11>, which is one or more selected from tetrakistrimethylsiloxysilane represented by the general formula [(CH ₃ ) ₃ SiO] ₄ Si Fee.
<13> The stick-like emulsified cosmetic according to any one of <1> to <12>, wherein the content of the component (e) is 20 to 35% by mass relative to the total amount of the cosmetic.

  Hereinafter, the present invention will be described with reference to examples and comparative examples. In addition, all compounding quantities are the mass%.

Examples 1-9 and Comparative Examples 1-8
A UV stick cream for eyes having the composition shown in Table 1 was produced, and the breaking strength, emulsification stability and feeling of use of the obtained UV stick cream for eyes were evaluated. The results are also shown in Table 1. Examples 4 to 6 are reference examples outside the scope of claims.

(Production method)
(1) After the oil phase components 1 to 12 are uniformly mixed at 95 ° C., powders 17 to 21 are added and uniformly dispersed at 85 ° C. for 10 to 15 minutes.
(2) After uniformly mixing the water phase components 13 to 16 at 80 ° C., the mixture is added to (1) with stirring, and emulsified and mixed and defoamed.
(3) (2) was poured into a 9φ stick-shaped container (manufactured by Hydan), cooled and molded to obtain a UV stick cream for the eyes.

(Evaluation method)
(1) Breaking strength The molded product was allowed to stand in a thermostatic bath at 30 ° C. for 1 day, and then placed in a rheometer (SUN RHEO METER COMPAC-100II) at a 45 ° angle to measure the breaking strength. The evaluation criteria are as follows.
◎: 80 g or more ○: 70 g or more and less than 80 g Δ: 60 g or more and less than 70 g x: less than 60 g

(2) Emulsification stability After standing in a 45 ° C. constant temperature bath for 1 month, the state change of each sample was observed and evaluated according to the following criteria.
A: No alteration such as discoloration, odor, separation, etc. ○: Slightly discoloration, odor, separation, etc., but acceptable range for cosmetics Δ: Discoloration, odor, separation, etc. x: Significant discoloration, There are alterations such as odor and separation.

(3) Feeling of use Each sample was applied to the faces of 20 female panelists, and the characteristics of use were evaluated according to the number of respondents who replied that “feel is smooth”. The evaluation criteria are as follows.
◎: Number of people is 18 or more ○: Number of people is 15-17 people △: Number of people is 7-14 people ×: Number of people is 6 people or less

  From Table 1, Comparative Example 1 in which the content of component (a) is 10% by mass, Comparative Examples 2 and 3 in which (a) :( b) is outside the range of 1: 1 to 1: 3, Component (b) Comparative Examples 4 and 5 containing an oily component having an IOB value outside the range of 0.2 to 0.45 in place of (1), and (vinyl dimethicone / methicone silsesquioxane) cross polymer in place of component (d) Comparative Example 6 to be contained and Comparative Examples 7 and 8 in which the content of the component (e) was outside the range of 15 to 40% by mass were poor in break strength, emulsion stability, and usability. On the other hand, it was found that each example of the present invention showed a higher effect than the comparative example.

Example 10 (whitening stick cream)
The whitening stick cream obtained by a conventional method having the following composition is excellent in breaking strength, emulsion stability and feeling of use.
(Oil phase)
Paraffin 12.0
Polyethylene wax 2.0
Dodecamethylcyclohexasiloxane (e) 25.0
Sorbitan isostearate 2.0
Vaseline 5.0
Liquid paraffin 5.0
Octyl paramethoxycinnamate (a) 2.0
Octyldodecanol (IOB = 0.26) (b) 1.0
Tri (capryl / capric acid) glyceryl (b) 4.0
(IOB = 0.3)
(Water phase)
Sorbitol 1.5
Dipropylene glycol 4.0
Maltitol 1.5
Ascorbic acid 2-glucoside 2.0
Sodium dehydroacetate 0.05
Methylparaben 0.15
Purified water to 100.0
(powder)
Titanium oxide (c) * 1 5.0
Polymethylsilsesquioxane (d) * 2 4.0
Nε-lauroyl-L-lysine 1.0

Example 11 (eye stick cream)
An eye stick cream obtained by a conventional method having the following composition is excellent in break strength, emulsification stability and feeling of use.
(Oil phase)
Paraffin 10.0
Polyethylene wax 3.0
Decamethylcyclopentasiloxane (e) 30.0
Sorbitan isostearate 2.0
Vaseline 5.0
Liquid paraffin 5.0
Diethylaminohydroxybenzoyl hexyl benzoate (a) 2.0
Propylene glycol dicaprylate (IOB = 0.2) (b) 4.0
Stearyl glycyrrhetinate 0.1
(Water phase)
Sorbitol 1.5
Dipropylene glycol 4.0
Maltitol 1.5
Sodium dehydroacetate 0.05
Methylparaben 0.15
Purified water to 100.0
(powder)
Titanium oxide (c) * 1 5.0
Polymethylsilsesquioxane (d) * 2 4.0
Nε-lauroyl-L-lysine 1.0

  According to the present invention, it is possible to provide a stick-type emulsified cosmetic that has an ultraviolet ray protection effect, has good stability without being deteriorated even when stored for a long period of time, and has good stability and excellent usability. Can do.

Claims (5)

The following components (a) to (e) are contained, the content of the component (a) is 1 to 6% by mass with respect to the total amount of the cosmetic, and the content of the component (e) is 15 with respect to the total amount of the cosmetic. a 40 mass%, the mass ratio of component (a) and component (b) (a) :( b) = 1 : 1~1: 3 der is, powder content of the component (c) A stick-like emulsified cosmetic, characterized in that it is 40 to 70% by mass with respect to the total amount, and the content of component (d) is 20 to 50% by mass with respect to the total amount of powder .
(A) Ultraviolet absorber (b) 1 to 18% by mass of an oily component having an IOB value of 0.2 to 0.45
(C) 1-8 mass% of ultraviolet scattering agent
(D) 2 to 10% by mass of polymethylsilsesquioxane
(E) Volatile silicone oil The stick-like emulsified cosmetic according to claim 1, wherein the component (c) the ultraviolet scattering agent is titanium oxide or zinc oxide. The stick-like emulsified cosmetic according to claim 1 or 2, further comprising water and having a content of 5 to 40% by mass relative to the total amount of the cosmetic. The stick-like emulsification according to any one of claims 1 to 3, further comprising a nonionic surfactant having an HLB value of 7 or less and having a content of 0.1 to 5% by mass relative to the total amount of the cosmetic. Cosmetics. The stick-like emulsified cosmetic according to any one of claims 1 to 4, further comprising a wax and having a content of 5 to 30% by mass relative to the total amount of the cosmetic.