Polyglyceryl Isostearate

Abstract

To provide a novel composition that allows stable and transparent blending of water when blended with an oil-based component.SOLUTION: The present invention discloses a polyglycerol isostearate which is an ester of a fatty acid and a polyglycerol. In the constituent fatty acids, a proportion of C18 branched-chain fatty acids is 85 mass% or more. In the branched-chain fatty acids, a proportion of cyclic-structure fatty acids is 10 mass% or less, in the polyglycerol isostearate.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to polyglyceryl isostearate.

Background Art

[0002] Polyglyceryl isostearate is a surfactant having functions such as emulsification, cleansing, dispersion, and emollient. It is formulated in cosmetics such as cleansing, skin care, hair care, and makeup products, and is particularly used in cleansing cosmetics containing oily components. Cleansing cosmetics include emulsion type, oil type, liquid type, aqueous type, etc., and are used according to their usability. <00000l2>

[0003] Oil-type cleansing cosmetics can remove thick makeup and wash away stubborn makeup stains such as waterproof makeup. Also, they are often used when taking a bath, and it is required that they do not emulsify even when used with wet hands and their cleansing power does not decrease. Liquid-type cleansing cosmetics are inferior to oil-type in terms of the ability to remove makeup stains, but they are likely to provide a refreshing feeling because they contain a large amount of aqueous components. As a liquid type, a cleansing technology of a bicontinuous microemulsion that pursues cleansing power and a refreshing feeling is known (Patent Document 1).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] As mentioned above, oil-type and liquid-type cleansing cosmetics are required to be stable and not emulsify even when a large amount of water is added. However, oil-type cleansers emulsify immediately when used with wet hands, reducing their cleansing power. Liquid-type cleansers often require the addition of polyhydric alcohols to stably incorporate oily components, which can result in a sticky texture and odor characteristic of polyhydric alcohols. Therefore, further improvements are needed.

[0006] The present invention relates to providing a novel composition for stably and transparently incorporating water into oily components. [Means for solving the problem]

[0007] The present invention relates to the following conditions [1] to [3]. [1] Polyglyceryl isostearate, which is an ester of a fatty acid and polyglycerol, wherein the proportion of branched fatty acids with 18 carbon atoms in the constituent fatty acids is 85% by mass or more, and the proportion of fatty acids having a cyclic structure in the branched fatty acids is 10% by mass or less. A cosmetic composition comprising polyglyceryl isostearate as described in [2][1]. A cosmetic comprising the cosmetic composition described in [3][2]. [Effects of the Invention]

[0008] According to the present invention, a novel polyglyceryl isostearate can be provided as a novel composition for stably and transparently incorporating water when blended with oily components. When this composition is blended with an oily component, and water is further added, a transparent microemulsion can be obtained, thus solving the above-mentioned problems of cleansing oils and cleansing liquids. Furthermore, a nanoemulsion that is transparent when a large amount of water is added can be provided. [Modes for carrying out the invention]

[0009] As a result of diligent research by the inventors, it was found that when a specific polyglyceryl isostearate with a low proportion of the cyclic fatty acid newly discovered by the inventors is incorporated into an oily component, water can be incorporated stably and transparently. Although the mechanism is not clear, it is presumed that such polyglyceryl isostearate is less affected by the steric hindrance of the cyclic structure and readily forms self-assembly structures.

[0010] The polyglyceryl isostearate of the present invention is an ester of a fatty acid and polyglycerol, and contains a branched fatty acid with 18 carbon atoms as a constituent fatty acid. Here, branched fatty acid is a general term for fatty acids in which the hydrocarbon chain R in the fatty acid structural formula R-COOH has a branched structure, and also includes fatty acids having a cyclic structure. Examples of cyclic structures include cyclopentane and cyclohexane. In this specification, the description of "polyglyceryl isostearate" also includes polyglyceryl diisostearate.

[0011] The polyglyceryl isostearate of the present invention contains 85% by mass or more, preferably 88% by mass or more, of branched fatty acids with 18 carbon atoms, from the viewpoint of transparency when hydrated after being blended with oily components. The upper limit can be, for example, 100% by mass or less, 98% by mass or less, 96% by mass or less, or 94% by mass or less, and any combination of these ranges is acceptable. Examples of other constituent fatty acids include myristic acid, palmitic acid, stearic acid, arachidic acid, and behenic acid.

[0012] In the polyglyceryl isostearate of the present invention, the proportion of fatty acids having a cyclic structure in the branched fatty acid with 18 carbon atoms is 10% by mass or less, preferably 9% by mass or less, from the viewpoint of transparency when hydrated after being blended with an oily component. The lower limit may be 0% by mass, but from the viewpoint of productivity, it is preferable to have a value greater than 0% by mass, for example, 0.5% by mass or more, 1.0% by mass or more, 2.0% by mass or more, and any combination of these ranges is acceptable.

[0013] In this specification, the proportion of branched fatty acids with 18 carbon atoms in the constituent fatty acids of polyglyceryl isostearate, and the proportion of fatty acids with a cyclic structure in the branched fatty acids with 18 carbon atoms, are determined by saponifying polyglyceryl isostearate and measuring the fatty acids extracted by conventional methods using GC-MS.

[0014] In the polyglyceryl isostearate of the present invention, the average degree of polymerization of polyglycerin is preferably 4 to 30, more preferably 6 to 20, and even more preferably 10 to 20. The average degree of polymerization of polyglycerin as used herein is the average degree of polymerization of polyglycerin calculated from the hydroxyl value by end group analysis, and is the average degree of polymerization calculated from (Formula 1) and (Formula 2). (Formula 1) Average degree of polymerization = (112.2×10 3 (-18 × hydroxyl value) / (74 × hydroxyl value - 56.1 × 10 3 ) (Equation 2) Hydroxyl value = (ab) × 28.05 / Amount of sample taken (g) a: Amount of 0.5N potassium hydroxide solution consumed in a blank test (ml) b: Amount of 0.5N potassium hydroxide solution consumed in this test (ml) The hydroxyl value in (Equation 1) above is calculated using (Equation 2) in accordance with "Standard Test Methods for Analysis of Fats and Oils (I), 1996 Edition," compiled by the Japan Oil Chemists' Society.

[0015] The HLB value of polyglyceryl isostearate in the present invention is preferably 8 to 14, more preferably 9 to 13, even more preferably 10 to 13, and even more preferably 11 to 13, from the viewpoint of transparency when hydrated after being blended with an oily component. In this specification, HLB refers to HLB based on the Atlas method and can be easily calculated as follows. HLB = 20(1 - S / A) S: Saponification value of polyglyceryl isostearate A: Acid value of the fatty acids that make up polyglyceryl isostearate

[0016] The polyglyceryl isostearate of the present invention can be obtained by esterifying the above-mentioned specific fatty acid with polyglycerin using a general synthesis method for polyglycerin fatty acid esters, and may be further purified according to known methods. For example, it can be produced by adding a catalyst such as an alkali to the raw materials, polyglycerin and fatty acid, and carrying out an esterification reaction at atmospheric pressure or reduced pressure at 200°C or higher.

[0017] Here, methods for producing the raw material fatty acids include the Garbet process, the aldol condensation method, and methods utilizing by-products from dimer acid production. However, from the viewpoint of reactivity with polyglycerin, it is preferable to produce them using methods utilizing by-products from dimer acid production. More specifically, by adding a clay catalyst such as bentonite to rapeseed oil, sunflower oil, tall oil, soybean oil, palm oil, or beef tallow, and carrying out the reaction under heating and pressure at 200-280°C, a mixture is obtained with dimer acid as the main product and isostearic acid as a by-product. The obtained mixture can be distilled to produce fatty acids mainly composed of isostearic acid. The fatty acids obtained by this production method are mixtures and include fatty acids having a cyclic structure with 18 carbon atoms. Here, if the proportion of fatty acids having a cyclic structure in the branched fatty acids with 18 carbon atoms in the obtained fatty acids is outside the above range, it can be adjusted to the above range by, for example, molecular distillation, purification, or adjusting the fatty acid composition of the raw materials for dimer acid production. In the present invention, it is preferable to use sunflower oil from the viewpoint of facilitating the adjustment of the proportion of fatty acids having a cyclic structure in the branched fatty acids with 18 carbon atoms. In this specification, the proportion of branched fatty acids with 18 carbon atoms in the raw material fatty acids, and the proportion of cyclic fatty acids in the branched fatty acids with 18 carbon atoms, are measured by gas chromatography-mass spectrometry (GC-MS). Details are shown in the examples below.

[0018] The polyglyceryl isostearate of the present invention can be used in cosmetic compositions because it allows for stable and transparent water incorporation when combined with oily components. The following describes cosmetic compositions containing the polyglyceryl isostearate of the present invention.

[0019] The cosmetic composition of the present invention may further contain oily components. Examples of oily components include ester oils and hydrocarbon oils. Examples of ester oils include diethylhexyl adipate, diisopropyl adipate, diisobutyl adipate, di-2-hexyldecyl adipate, diheptylundecyl adipate, ethyl avocado oil fatty acid, alkyl benzoate, isostearyl glyceryl, hexyldecyl isostearate, isopropyl isostearate, octyldodecyl isostearate, isocetyl isostearate, isostearyl isostearate, glyceryl isostearate, cholesteryl isostearate, and isotriyl isononanoate. Decyl, Isononyl Isononanoate, Isodecyl Isononanoate, Tridecyl Isononanoate, Ethylhexyl Isopalmitate, Ethylhexyl Isoperargonate, Cetyl Ethylhexanoate, Octyldodecyl Erucate, Cetostearyl Ethylhexanoate, Ethylene Glycol Fatty Acid Ester, Octyldodecyl Erucate, Alkyl Ethylhexanoate (C14, C16, C18), Isocetyl Ethylhexanoate, Cetearyl Ethylhexanoate, Stearyl Ethylhexanoate, Isostearyl Ethylhexanoate, Ethyl Oleate Cetyl oleate, oleyl oleate, octyldodecyl oleate, decyl oleate, phytosteryl oleate, cetyl caprate, cetyl caprylate, diethylhexyl succinate, polypropylene glycol succinate oligoester, lanolin acetate, glyceryl diisostearate, neopentyl glycol diisostearate, propylene glycol dicaprylate, neopentyl glycol dicaprate, neopentyl glycol diethylhexanoate, ethylene glycol diethylhexanoate, ethylene glycol dioleate Recall, Propylene Glycol Dicaprate, Hexyldecyl Dimethylethylhexanoate, Octyldodecyl Dimethylethylhexanoate, Propylene Glycol Diperargonate, Hexyldecyl Stearate, Dialkyl Carbonate, Decaglyceryl Nonaiisostearate, Decaglyceryl Decaisostearate, Pentaerythrityl Tetraethylhexanoate, Diglyceryl Tetraisostearate, Glyceryl Triisostearate, Diglyceryl Triisostearate, Trimethylolpropane Triisostearate,Glyceryl trioleate, glyceryl tricaprylate, triethylhexanoin, trimethylolpropane triethylhexanoate, glyceryl tri (caprylate / caprate), lauryl lactate, octyldodecyl lactate, hexyldecyl neodecanoate, isostearyl palmitate, isopropyl palmitate, ethylhexyl palmitate, isocetyl palmitate, ethylhexyl hydroxystearate, isotridecyl myristate, isocetyl myristate, isostearyl myristate, isopropyl myristate, octyldodecyl myristate, isostearyl laurate, isopropyl lanolin fatty acid, hexyl laurate, octyldodecyl ricinoleate, tocopherol linoleate, octyldodecyl ricinoleate, diisostearyl malate and the like can be mentioned. Examples of hydrocarbon oils include isododecane, hydrogenated polyisobutene, squalane, ceresin, paraffin, pristane, liquid paraffin, liquid isoparaffin, petrolatum and the like. Among these, cetyl ethylhexanoate, ethylhexyl palmitate, hydrogenated polyisobutene, isododecane, isononyl isononanoate are preferable.

[0020] In the cosmetic composition of the present invention, the content of the oily component is preferably 100 parts by mass or more, more preferably 150 parts by mass or more, still more preferably 200 parts by mass or more from the viewpoint of transparency upon hydration, with respect to 100 parts by mass of polyglyceryl isostearate of the present invention. Also, from the viewpoint of transparency upon hydration, it is preferably 400 parts by mass or less, more preferably 350 parts by mass or less, still more preferably 300 parts by mass or less, and any combination within these ranges may be used. When two or more kinds of oily components are used, the content of the oily components refers to the total amount.

[0021] In the composition for cosmetics of the present invention, a medium-chain fatty acid ester can be further contained. Examples of the medium-chain fatty acid ester include esters of polyglycerin having a polymerization degree of 2 to 20 with a fatty acid having 8 to 10 carbon atoms and glycerin. The HLB of the medium-chain fatty acid ester is preferably 7 to 13, more preferably 8 to 12, still more preferably 9 to 12, and even more preferably 10.5 to 11.5. Here, when two or more medium-chain fatty acid esters are used in combination, the HLB refers to the mixed HLB derived from the weighted average of the two or more medium-chain fatty acid esters.

[0022] Examples of the medium-chain fatty acid ester preferably include decaglyceryl pentacaprylate, hexaglyceryl dicaprylate, diglyceryl sesquicaprylate, eicosaglyceryl heptacaprylate, eicosaglyceryl pentacaprylate, etc., and more preferably decaglyceryl pentacaprylate and eicosaglyceryl heptacaprylate. Also, preferred combination examples include the combination of hexaglyceryl dicaprylate and hexaglyceryl caprylate, the combination of diglyceryl sesquicaprylate and hexaglyceryl caprylate, etc., and more preferably the combination of hexaglyceryl dicaprylate and hexaglyceryl caprylate.

[0023] The content of the medium-chain fatty acid ester in the composition for cosmetics of the present invention is preferably 20 parts by mass or more, more preferably 30 parts by mass or more, still more preferably 40 parts by mass or more, from the viewpoint of transparency upon hydration, with respect to 100 parts by mass of polyglyceryl isostearate of the present invention, and is preferably 600 parts by mass or less, more preferably 300 parts by mass or less, still more preferably 100 parts by mass or less, from the viewpoint of transparency upon hydration, and any combination within these ranges may be used. In addition, when two or more medium-chain fatty acid esters are used, the content of the medium-chain fatty acid ester refers to the total amount.

[0024] The cosmetic composition of the present invention may further contain water. The amount of water in the cosmetic composition of the present invention depends on the type of cosmetic, but for example, it can be added in amounts of 0 to 10,000 parts by mass per 100 parts by mass of polyglyceryl isostearate of the present invention.

[0025] In addition to the above, the cosmetic composition of the present invention may further contain various components that can be used in cosmetics, such as surfactants, oils, aqueous gelling agents, oily gelling agents, UV absorbers, powders, antioxidants, preservatives, fragrances, colorants, chelating agents, cooling agents, thickeners, plant extracts, vitamins, neutralizing agents, moisturizers, anti-inflammatory agents, pH adjusters, amino acids, etc. Here, polyhydric alcohols may also be further included, but from the viewpoint of not producing the stickiness and odor characteristic of polyhydric alcohols, a composition containing a small amount or a composition that does not contain them is preferred. Examples of polyhydric alcohols include glycerin, diglycerin, dihydric alcohols such as 1,3-butylene glycol, propylene glycol, dipropylene glycol, 1,2-hexanediol, 1,2-pentanediol, isoprene glycol, and sugar alcohols such as sorbitol, mannitol, maltitol, and xylitol. The polyhydric alcohol content in the cosmetic composition of the present invention is preferably 200 parts by mass or less, more preferably 100 parts by mass or less, even more preferably 50 parts by mass or less, even more preferably 10 parts by mass or less, even more preferably 5 parts by mass or less, and even more preferably 0 parts by mass, per 100 parts by mass of polyglyceryl isostearate of the present invention.

[0026] The cosmetic composition of the present invention can be prepared by known methods. The cosmetic composition of the present invention can be used in cosmetics such as cleansing oil, cleansing liquid, cleansing lotion, wipe-off cleansing sheet, finely emulsified nanoemulsion lotion, body sheet, body lotion, baby wipes, and wet tissues. [Examples]

[0027] The present invention will be specifically described below with reference to examples and comparative examples, but the present invention is not limited to these.

[0028] Preparation of fatty acids fatty acid 1 Using sunflower oil as a raw material, a mixture was obtained by conventional methods, with dimer acid as the main component and isostearic acid as a by-product. The resulting mixture was distilled to obtain a fatty acid mainly composed of isostearic acid.

[0029] fatty acids 2-3 Except for using a mixture of sunflower oil and rapeseed oil as raw materials, it was prepared by distillation in the same manner as fatty acid 1.

[0030] fatty acids 4, 6 It was prepared in the same manner as fatty acid 1, except that the degree of purification by distillation was different.

[0031] fatty acids 5 It was prepared in the same manner as fatty acid 1, except that rapeseed oil was used as a raw material.

[0032] Measurement of the content of branched fatty acids with 18 carbon atoms The fatty acids obtained above were subjected to trimethylsilylation treatment and then analyzed by gas chromatography-mass spectrometry (GC-MS) under the following conditions to determine the content of 18-C18 branched fatty acids. As a result, it was found that the fatty acids also contained myristic acid, palmitic acid, stearic acid, arachidic acid, and behenic acid in addition to 18-C18 branched fatty acids. Therefore, the content of 18-C18 branched fatty acids in the fatty acids was determined by subtracting the peak areas of these other peaks from the total peak area. The content of 18-C18 branched fatty acids in the fatty acids was determined using the following formula (1) based on the area of ​​all peaks appearing at retention times of 12.0-22.0 minutes. The results are shown in Table 1. (GC conditions) Equipment: Agilent Technologies 7890A Column: DB-5HT (Length: 30m, Inner diameter: 0.25mm, Film thickness: 0.10μm) Inlet temperature: 380℃ Injection method: Split Split ratio: 30:1 Oven temperature: Hold at 100°C for 5 minutes, then increase the temperature to 240°C at a rate of 10°C / minute, and hold at 380°C for 17 minutes. Carrier gas: Helium Column flow rate: 1.5 mL / min Linear flow rate: 45.7cm / sec (MS conditions) Equipment: Agilent Technologies 5975C Ionization method: EI, 70 eV Formula (1) The percentage of 18-carbon branched fatty acids in a given fatty acid (by mass) = (1 - A / B) × 100 A: Sum of all peak areas of myristic acid, palmitic acid, stearic acid, arachidic acid, and behenic acid in the total ion chromatogram. B: Sum of all peak area values ​​appearing in the total ion chromatogram at retention times of 12.0-22.0 minutes.

[0033] Measurement of the content of fatty acids having a cyclic structure with 18 carbon atoms. From the total ion chromatograms of fatty acids obtained by the GC-MS analysis described above, ion chromatograms with mass-to-charge ratios of 341 and 339 were extracted, respectively. 341 represents the mass-to-charge ratio when a methyl radical is eliminated during ionization from a non-cyclic fatty acid in a trimethylsilylated C18 branched fatty acid, while 339 represents the mass-to-charge ratio when a methyl radical is eliminated during ionization from a cyclic fatty acid in a trimethylsilylated C18 branched fatty acid. The area of ​​all peaks appearing within a retention time of 12.0–22.0 minutes in the ion chromatograms for each mass-to-charge ratio was used to determine the content of cyclic fatty acids in C18 branched fatty acids using the following equation (2). The results are shown in Table 1. Formula (2) The percentage (by mass) of cyclic fatty acids in branched fatty acids with 18 carbon atoms = C / (C+D) × 100 C: Sum of all peak areas appearing in the ion chromatogram with a mass-to-charge ratio of 339 at retention times of 12.0-22.0 minutes. D: Sum of all peak areas appearing in the ion chromatogram with a mass-to-charge ratio of 341 at retention times of 12.0-22.0 minutes.

[0034] Preparation of polyglyceryl isostearate Polyglyceryl isostearate 1-12 As shown in Table 1, sodium methoxide was added to the fatty acids and polyglycerin prepared above, and an esterification reaction was carried out at 260°C under normal pressure to obtain polyglyceryl isostearate.

[0035] [Table 1]

[0036] Preparation of medium-chain fatty acid esters Medium-chain fatty acid esters were obtained by adding sodium hydroxide to medium-chain fatty acids and polyglycerol and carrying out an esterification reaction at atmospheric pressure and 240°C.

[0037] Preparation of cosmetic compositions Examples 1-19, Comparative Examples 1-11 Polyglyceryl isostearate listed in Table 1, along with auxiliary surfactants such as decaglyceryl pentacaprylate, hexaglyceryl dicaprate, diglyceryl sesquicaprylate, hexaglyceryl caprylate, eicosaglyceryl heptacaprylate, eicosaglyceryl pentacaprate, and oily components, were heated and dissolved at 70°C in the compositions shown in Tables 2-4. The mixture was then cooled to room temperature while stirring to produce 100g of cosmetic composition.

[0038] The details of the ingredients used in the preparation of the cosmetic composition are shown below. Cetyl ethylhexanoate (Exceparl HO) ... Kao Corporation Ethylhexyl palmitate (Saracos P-8) ... Nisshin Oillio Group Co., Ltd. Hydrogenated polyisobutene (Pearlream 4) ... NOF Corporation Isododecane (Marcazole®) ... Maruzen Petrochemical Co., Ltd. Isononyl isononanoate (Saracos 99) ... Nisshin Oillio Group, Ltd.

[0039] Water addition test For each example and comparative example, 20 g of the cosmetic composition was taken, and water was added in small amounts and stirred to prepare the solution. The critical water content at which stability and transparency could be maintained was investigated. The diluted cosmetic composition was stored at room temperature, and if it did not separate the next day and maintained a transmittance of 50% or higher, it was considered stable and transparent. Transmittance was measured at a wavelength of 650 nm using a spectrophotometer manufactured by Hitachi High-Tech Science Co., Ltd., with 2.5 ml of the diluted cosmetic composition placed in a quartz cell with an optical path length of 1.0 cm. Here, the transmittance of ion-exchanged water was set to 100%. When the weight of 20 g of the cosmetic composition was set to 100%, the water content (%) was calculated from the amount of water added (g) as shown in equation (3). When the critical water content was 1000% or higher, the critical water content was set to 1000%. The results are shown in Tables 2 to 4. Formula (3) Water addition rate (%)=E / 20×100 E: Amount of water added (g)

[0040] [Table 2]

[0041] [Table 3]

[0042] [Table 4]

[0043] As shown in Tables 2-4, Examples 1-13, which use polyglyceryl isostearate containing a fatty acid in which the proportion of branched fatty acids with 18 carbon atoms is 85% by mass or more, and the proportion of cyclic fatty acids in the branched fatty acid is 10% by mass or less, show that water can be blended stably and transparently compared to Comparative Example 2, which uses polyglyceryl isostearate containing a fatty acid in which the proportion of branched fatty acids is 80%, and Comparative Examples 1, 3-11, which use polyglyceryl isostearate containing a fatty acid in which the proportion of cyclic fatty acids is 12%. Furthermore, as shown in Examples 14-19, it can be used regardless of the type of oil.

[0044] Prescription Example 1 [Cleansing Oil] (Component name) (mass%) 1. Decaglyceryl diisostearate 16.2 2. Hexaglyceryl dicaprate 11.3 3. Hexaglyceryl caprylate 2.5 4. Ethylhexyl palmitate 56.0 5. Isododecane 5.0 6. Dicaprylyl carbonate 2.0 7. Isononyl isononanoate 5.0 8. Dimethicone 2.0 Total 100

[0045] Prescription Example 2 [Cleansing Liquid] (Component name) (mass%) 1. Decaglyceryl diisostearate 7.5 2. Hexaglyceryl dicaprate 6.0 3. Hexaglyceryl caprylate 1.5 4. Cetyl ethylhexanoate 8.5 5. Ethylhexyl palmitate 3.0 6. Isododecane 2.0 7. Sunflower seed oil 2.0 8. Rice bran oil 2.0 9.Purified water 67.4 10. pH adjuster 0.1 Total 100

[0046] Prescription Example 3 [Wipe-off type cleansing sheets] The following ingredients are impregnated into the nonwoven fabric. (Component name) (mass%) 1. Decaglyceryl diisostearate 2.0 2. Decaglyceryl pentacaprylate 1.0 3. Hydrogenated polyisobutene 2.0 4. Ethylhexyl palmitate 2.0 5.Purified water 87.0 6. Ethanol 5.0 7. pH adjuster 0.1 8. Methylparaben 0.1 9. Phenoxyethanol 0.2 10. Ethylhexylglycerin 0.5 11. EDTA-2Na 0.1 Total 100

[0047] Prescription Example 4 [Nano Emulsion Lotion] (Component name) (mass%) 1. Decaglyceryl diisostearate 0.34 2. Decaglyceryl Pentacaprylate 0.16 3. Cetyl ethylhexanoate 0.8 4. Triethylhexanoin 0.2 5. Squalane 0.2 6. Glycerin 2.0 7.Purified water 95.74 8. Methylparaben 0.1 9. Phenoxyethanol 0.2 10. Ethylhexylglycerin 0.1 11. Xanthan gum 0.03 12. Fragrance 0.03 13. pH adjuster 0.1 Total 100

[0048] Prescription Example 5 [Body Sheet] The following ingredients are impregnated into the nonwoven fabric. (Component name) (mass%) 1. Decaglyceryl diisostearate 0.2 2. Decaglyceryl pentacaprylate 0.1 3.Purified water 59.2 4. Ethanol 40.0 5. Menthol 0.2 6. Menthyl lactate 0.1 7. Camphor 0.1 8. Fragrance 0.1 Total 100

[0049] Prescription Example 6 [Baby wipes] The following ingredients are impregnated into the nonwoven fabric. (Component name) (mass%) 1. Decaglyceryl diisostearate 2.0 2. Decaglyceryl pentacaprylate 1.0 3. Cetyl ethylhexanoate 4.0 4. Hydrogenated polyisobutene 1.0 5. Squalane 2.0 6. Glycerin 5.0 7.Purified water 83.0 8. Methyl Gluceth-10 1.0 9. Methylparaben 0.1 10. Phenoxyethanol 0.2 11. Ethylhexylglycerin 0.5 12. pH adjuster 0.1 13. EDTA-2Na 0.1 Total 100

[0050] Prescription example 7 [Wet wipes] The following ingredients are impregnated into the nonwoven fabric. (Component name) (mass%) 1. Decaglyceryl diisostearate 0.34 2. Decaglyceryl Pentacaprylate 0.16 3. Cetyl ethylhexanoate 0.7 4. Glyceryl caprylate 0.2 5. Squalane 0.3 6. Glycerin 3.0 7.Purified water 89.3 8. Ethanol 5.0 9. pH adjuster 0.1 10. Methylparaben 0.1 11. Phenoxyethanol 0.2 12. Ethylhexylglycerin 0.5 13. EDTA-2Na 0.1 Total 100 [Industrial applicability]

[0051] The polyglyceryl isostearate of the present invention can be suitably used in cosmetics and the like.

Claims

1. Polyglyceryl isostearate is an ester of a fatty acid and a polyglycerin, wherein the proportion of branched fatty acids having 18 carbon atoms in the constituent fatty acids is 85% by mass or more, and the proportion of fatty acids having a cyclic structure in the branched fatty acids is 10% by mass or less.

2. 2. The polyglyceryl isostearate according to claim 1, having an HLB of 8 to 14.

3. The polyglyceryl isostearate according to claim 1 or 2, wherein the average degree of polymerization of the polyglycerol is 4 to 30.

4. The polyglyceryl isostearate according to any one of claims 1 to 3, which is polyglyceryl diisostearate.

5. A cosmetic composition comprising the polyglyceryl isostearate according to any one of claims 1 to 4.

6. 6. The cosmetic composition according to claim 5, comprising at least one medium-chain fatty acid polyglycerol ester, which is an ester of a fatty acid having 8 to 10 carbon atoms and a polyglycerol having a degree of polymerization of 2 to 20.

7. 7. The cosmetic composition according to claim 6, wherein the medium-chain fatty acid polyglycerol ester has an HLB of 7 to 13.

8. The cosmetic composition according to any one of claims 5 to 7, further comprising one or more oily components selected from ester oils and hydrocarbon oils.

9. A cosmetic comprising the cosmetic composition according to any one of claims 5 to 8.