JP5436113B2 - Oily cosmetics - Google Patents

Description

  The present invention relates to an oily cosmetic that maintains a smooth feel.

  Oily cosmetics can be applied to the lips and skin to protect against dryness and give a smooth feel. However, there is a problem that oil agents with a residual feeling in oily cosmetics are sticky and difficult to stretch. On the other hand, low-viscosity oils have a poor residual feel and cannot maintain a smooth feel, and even the feeling of application tends to be lost. For lip cosmetics, this is a particularly significant problem.

  It is known that water-based cosmetics such as lotions, O / W type emulsions, and massage agents can impart a smooth feel by blending a water-soluble polymer having a large molecular weight. Similarly, attempts have been made to modify oily cosmetics by using high molecular compounds (cellulose derivatives and the like) having a large molecular weight (for example, Patent Documents 1 and 2). However, these suppress the secondary adhesion of the oily cosmetic and do not improve the coating feeling.

  In contrast, polyisoprene, polyether, and the like (for example, Patent Document 3) can improve a smooth feel. However, when such a polymer compound is used, strong stringing occurs when applied.

  Patent Document 4 discloses an oil-soluble polysaccharide palmitate ester and describes that it is also used in cosmetics as an oil-based thickener.

Special table 2007-527861 gazette JP-A-8-175929 International Publication No. 99/42513 Pamphlet JP-A-5-255401

  It is an object of the present invention to provide an oily cosmetic that maintains a smooth feel.

  The present inventors have found that an oily cosmetic with a smooth feel can be obtained by using a specific cellulose derivative in combination with a specific ratio of liquid ester oil and liquid hydrocarbon oil.

The present invention includes the following components (A), (B) and (C):
(A) The main chain has a cellulose skeleton, and 67 mol% or more of all hydroxyl groups are a group —O—M—R (M is CH ₂ or a carbonyl group C═O, and R is a straight chain having 3 to 40 carbon atoms. Or a cellulose derivative substituted with a branched alkyl group or alkenyl group),
(B) ester oil which is liquid at 25 ° C.,
(C) An oily cosmetic comprising liquid hydrocarbon oil at 25 ° C. and having a mass ratio of components (B) and (C) of (B) / (C) = 8/1 to 1/4 To do.

  The oily cosmetic composition of the present invention has a special elongation and familiarity when applied, unlike a simple oily agent, and maintains a unique smooth feel. In addition, the stickiness and feeling of application are maintained.

Incidentally, Patent Document 4, supra, discloses a very wide range of from 0.5 to 50.0 of the infrared absorption ratio as the degree of preferred esterification (peak ratio of 1734 cm-1 and 3470cm ^-1) In addition, only the use as a thickener is shown, and as in the present application, a cellulose derivative having a specific structure is used together with a specific quantitative ratio of ester oil and hydrocarbon oil, thereby providing a smooth feel. There is no disclosure that can be obtained.

The cellulose derivative of the component (A) used in the present invention is not particularly limited as long as it has a cellulose skeleton in the main chain, but the raw material cellulose derivative includes cellulose and short chains such as acetylcellulose and acetylbutylcellulose. Preference is given to cellulose modified with acylated cellulose, hydroxyalkyl groups, glyceryl ether groups, (mono) alkyl glyceryl ether groups. More specifically, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxypropylmethyl cellulose, glyceryl cellulose, methyl glyceryl cellulose and the like can be mentioned.
Furthermore, as a raw material cellulose derivative, what has the following structural units is preferable.

(In the formula, R ′ represents a linear or branched alkylene group having 2 to 8 carbon atoms, and n represents a number with an average added mole number of R′O per glucose unit of 0.1 to 10)

  In the structural unit, R ′ is preferably a linear or branched alkylene group having 2 to 4 carbon atoms, and more preferably an ethylene group or a propylene group. Moreover, as n, the number from which the average added mole number of R′O per glucose unit is 0.3 to 5 is preferable, the number from 0.5 to 4.5 is more preferable, and the number from 1 to 4 is Further preferred.

Preferred examples of the raw material cellulose derivative include hydroxyethyl cellulose and hydroxypropyl cellulose, and hydroxypropyl cellulose is particularly preferable.
Moreover, the weight average molecular weight (Mw) of the raw material cellulose derivative is preferably 10,000 to 4,000,000, more preferably 100,000 to 3,000,000, and still more preferably 500,000 to 200, from the viewpoint of solubility in oil and feel. Ten thousand.

In the group —O—M—R, which is a hydroxyl group substituent of the raw material cellulose derivative, M represents CH ₂ or a carbonyl group C═O, and R represents a linear or branched alkyl group or alkenyl having 3 to 40 carbon atoms. It is a group.
(I) As a linear alkyl group, butyl group, pentyl group, hexyl group, heptyl group, octyl group, nonyl group, decyl group, undecyl group, dodecyl group, tridecyl group, tetradecyl group, pentadecyl group, hexadecyl group, Heptadecyl group, octadecyl group, nonadecyl group, icosyl group, heicosyl group, docosyl group, tricosyl group, tetracosyl group, pentacosyl group, hexacosyl group, heptacosyl group, octacosyl group, nonacosyl group, triacontyl group, hentriacontyl group, dotriacontyl group, Examples include tritriacontyl group, tetratriacontyl group, pentatriacontyl group, hexatriacontyl group, heptatriacontyl group, octatriacontyl group, nonatriacontyl group, tetracontyl group and the like.

(Ii) Examples of branched alkyl groups include methylpentyl, methylhexyl, methylheptyl, methyloctyl, methylnonyl, methylundecyl, methylheptadecyl, ethylhexadecyl, methyloctadecyl, propyl Pentadecyl group, 2-hexyldecyl group, 2-octyldodecyl, 2-heptylundecyl group, 2-decyltetradecyl group, 2-dodecylhexadecyl group, 2-tetradecyloctadecyl group, 2-octadecylbehenyl group, etc. Can be mentioned.

(Iii) Examples of linear alkenyl groups include dodecenyl, tridecenyl, tetradecenyl, pentadecenyl, hexadecenyl, heptadecenyl, octadecenyl, nonadecenyl, icocenyl, henicocenyl, dococenyl, tricocenyl, tetracocenyl, pentacocenyl, hexacocenyl, heptacocenyl, octacocenyl, etc.
(Iv) Examples of branched alkenyl groups include isotridecenyl, isooctadecenyl, isotriacontenyl, 2-butyloctenyl, 2-hexyldecenyl, 2-octyldodecenyl, 2-decyltetradecenyl, 2- And dodecyl hexadecenyl.

  Among these, a linear alkyl group is preferable from the viewpoint of imparting smoothness during application of the oily cosmetic. Furthermore, from the ease of extending | stretching and the adhesiveness, C9-C21 is preferable, Furthermore, C11-C17, and especially 15 are preferable.

  The group-O-M-R substitution rate of the hydroxyl group is 67 mol% or more, particularly preferably 70 mol% or more, and more preferably 80 mol% or more and 100 mol%. The substitution rate of the group —O—M—R is preferably higher from the viewpoint of increasing the solubility in the oil, but is preferably 90 mol% or less from the viewpoint of moisture feeling and slipperiness. Moreover, it is preferable that the hydroxyl group remains appropriately in terms of no roughness. The preferred hydroxyl group content is 2 to 33 mol%, more preferably 5 to 20 mol%.

The weight-average molecular weight of the component (A) cellulose derivative is preferably 100,000 or more, more preferably 200,000 or more, and preferably 4 million or less, more preferably 3 million or less. In particular, 500,000 to 2,000,000 are preferable from the viewpoint that the solubility and the smooth feel are maintained.
In addition, a weight average molecular weight (Mw) is calculated | required by the gel permeation chromatography (The calibration curve defined using chloroform solvent and the linear polystyrene as a standard, and a parallax refractive index detector) measurement.

Such a cellulose derivative is obtained by reacting a raw material cellulose derivative with an acid halide having a linear or branched alkyl group or alkenyl group having 4 to 40 carbon atoms to replace 67 mol% or more of the total hydroxyl groups of the raw material cellulose derivative. It is manufactured by doing.
A compound in which M is CH ₂ can be produced by reacting a cellulose derivative with a corresponding sulfonic acid ester such as alkyl halide or alkyl mesylate in the presence of a base. The main chain comprising a cellulose skeleton can also be obtained by transesterification (acidolysis) of acetylcellulose. According to this method, a cellulose ester derivative having a very low residual amount of hydroxyl groups can be obtained.

  Specifically, hydroxyethyl cellulose lauric acid ester, hydroxyethyl cellulose myristic acid ester, hydroxyethyl cellulose palmitic acid ester, hydroxyethyl cellulose stearic acid ester, hydroxyethyl cellulose behenic acid ester; hydroxypropyl cellulose lauric acid ester, hydroxypropyl cellulose myristic acid ester, hydroxy Propylcellulose palmitate, hydroxypropylcellulose stearate, hydroxypropylcellulose behenate; hydroxyethylmethylcellulose laurate, hydroxyethylmethylcellulose myristic ester, hydroxyethylmethylcellulose palmitate, hydroxyethyl Cylcellulose stearate, hydroxyethylmethylcellulose behenate; hydroxypropylmethylcellulose laurate, hydroxypropylmethylcellulose myristic acid, hydroxypropylmethylcellulose palmitate, hydroxypropylmethylcellulose stearate, hydroxypropylmethylcellulose behenate It is done. Among these, hydroxypropyl cellulose laurate, hydroxypropyl cellulose myristic ester, hydroxypropyl cellulose palmitate, hydroxypropyl cellulose stearate, and hydroxypropyl cellulose behenate are preferred, and hydroxypropyl cellulose palmitate is particularly preferred.

  One or more cellulose derivatives of component (A) can be used, and from the viewpoint of ease of application to the skin, 0.1% by mass or more, and further 0.5% by mass or more in the oily cosmetic of the present invention. In particular, the content is preferably 0.8% by mass or more, more preferably 20% by mass or less, and particularly preferably 15% by mass or less. If it is this range, the smoothness after application | coating will continue more from the combination with the below-mentioned oil agent.

  Component (B) is an ester oil that is liquid at 25 ° C., for example, octyldodecyl myristate, isopropyl myristate, isopropyl isostearate, isononyl isononanoate, isotridecyl isononanoate, butyl stearate, oleyl oleate, octyldodecyl ricinoleate , Neopentyl glycol dicaprate, diisostearyl malate, octyl hydroxystearate, macadamia nut oil, olive oil, castor oil, jojoba oil, avocado oil, sunflower oil, polyglyceryl diisostearate, polyglyceryl triisostearate, glyceryl diisostearate, triisostearin Glyceryl acid, tri (caprylic / capric acid) glyceryl, glyceryl tri-2-ethylhexanoate, pentaerythrate tetraoctanoate Salicylic, and the like.

The ester oil of component (B) is a good solvent for the cellulose derivative of component (A) and is good for solubilizing component (A). In particular, the branched saturated fatty acid ester is a cellulose derivative of component (A). Is preferable in that it is easy to dissolve.
Examples of branched saturated fatty acid esters include isopropyl myristate, isopropyl isostearate, diisostearyl malate, isononyl isononanoate, isotridecyl isononanoate, 2-ethylhexyl palmitate, octyldodecyl myristate, octyldodecyl oleate, octyldodecyl erucate, etc. In particular, branched fatty acid branched alcohol esters are preferable, isononyl isononanoate and isotridecyl isononanoate, and isotridecyl isononanoate is particularly preferable.

  In the oily cosmetic composition of the present invention, one or more ester oils of the component (B) can be used. From the viewpoint of the solubility of the cellulose derivative of the component (A) and the feeling of use (elongation, familiarity) of the oily cosmetic composition. 10 to 80% by mass, particularly 20 to 60% by mass.

Component (C) is a hydrocarbon oil that is liquid at 25 ° C., and includes linear, branched, and alicyclic hydrocarbons. 170-5000 are preferable and, as for the number average molecular weight of a component (C), 250-3000 are more preferable.
Specific examples of such hydrocarbon oils include light isoparaffin, liquid paraffin, liquid isoparaffin, heavy liquid isoparaffin, hydrogenated polyisobutene, hydrogenated polydecene, squalane and the like. Among these, hydrogenated polyisobutene is particularly preferable in terms of maintaining a smooth feel and improving the coating feeling, and those having a number average molecular weight of 1000 to 4000, particularly 1300 to 2700 are more preferably used.

The component (C) hydrocarbon oil preferably contains a number average molecular weight of 1000 to 5000.
Moreover, it is preferable to mix and use 2 or more types of the hydrocarbon oil of a component (C). In particular, a liquid hydrocarbon oil having a number average molecular weight of 700 or less, particularly a number average molecular weight of 600 or less, and a liquid hydrocarbon oil having a number average molecular weight of 1000 or more, particularly a number average molecular weight of 2000 or more, are preferably mixed and used. Furthermore, it is preferable to use a liquid hydrocarbon oil having a number average molecular weight of 700 or less and a liquid hydrocarbon oil having a number average molecular weight of 1000 or more mixed at a ratio of 1/2 to 2/1. In this way, a unique smoothness different from that of a simple oil agent is obtained in relation to the components (A) and (B) described below, and the effect is not only sustained, but also the feeling of application. Can also be improved.

  One or more hydrocarbon oils of component (C) can be used. From the viewpoint of the smoothness of the oily cosmetic and the feeling of application, the oily cosmetic of the present invention has a total of 5 to 60% by mass, particularly 15 to 40%. It is preferable to contain by mass.

  The cellulose derivative of the component (A) is not simply dissolved in the oil, but the mass ratio of the component (B) to the component (C) is (B) / (C) = 8/1 to 1/4. In particular, the smoothness at the time of application and the smoothness over time are good. Furthermore, (B) / (C) = 5/1 to 1/3 is preferable, and 2/1 to 1/2 is more preferable.

  Moreover, although the total content of a component (B) and a component (C) changes also with dosage forms of oily cosmetics, 20-90 mass% is preferable, and 50-90 mass% is especially preferable.

  The oily cosmetic of the present invention can further contain a branched fatty acid, a higher alcohol, and a silicone oil as a feel modifier. Examples of branched fatty acids include those having 10 to 32 carbon atoms such as isononanoic acid and isostearic acid. Examples of higher alcohols include those having 10 to 30 carbon atoms such as lauryl alcohol, isostearyl alcohol, and octyldodecanol. Can be mentioned. Examples of the silicone oil include dimethylpolysiloxane, methylphenylpolysiloxane, dimethylcyclopolysiloxane, and methylhydrogenpolysiloxane.

  Moreover, a wax component can also be contained as a shape-retaining agent. Examples of such wax components include plant waxes such as candelilla wax, rice wax, carnauba wax and tree wax; animal waxes such as beeswax and whale wax; mineral waxes such as montan wax, ozokerite and ceresin; microcrystalline wax Petroleum waxes such as paraffin; hardened castor oil, hydrogenated jojoba oil, 12-hydroxystearic acid, stearamide, phthalic anhydride, silicone wax and other synthetic waxes; lauric acid, myristic acid, palmitic acid, stearic acid, Examples include fatty acids such as behenic acid and lanolin fatty acid.

In addition, extenders, colored pigments, and pearl pigments can be used as the color material.
Examples of extender pigments include silicic acid, anhydrous silicic acid, magnesium silicate, talc, sericite, mica, kaolin, clay, bentonite, bismuth oxychloride, zirconium oxide, magnesium oxide, aluminum oxide, calcium sulfate, barium sulfate, Examples thereof include inorganic pigments such as magnesium sulfate, calcium carbonate, and magnesium carbonate, and composite powders thereof.

  Color pigments include titanium oxide, zinc oxide, yellow iron oxide, red iron oxide, black iron oxide, bitumen, ultramarine, chromium oxide, chromium hydroxide and other metal oxides, manganese violet, metal complexes such as cobalt titanate, and carbon. Examples thereof include inorganic pigments such as black, organic pigments such as tar pigments and lake pigments, and natural pigments such as carmine.

Examples of the pearl pigment include mica, synthetic phlogopite, and glass coated with a colorant such as titanium oxide, iron oxide, silicon oxide, bitumen, chromium oxide, carmine, and organic pigment.
These color materials may be used after being subjected to various surface treatments such as water repellency treatment, water repellency / oil repellency treatment, and the like by ordinary methods. These can be contained in an oily cosmetic in an amount of 0.1 to 20% by mass.

  Furthermore, the oily cosmetics of the present invention include, in addition to the above-mentioned components, components used in ordinary cosmetics, such as surfactants, alcohols, polyhydric alcohols, polymer compounds, ultraviolet absorbers, antioxidants, dyes, A fragrance | flavor, a pigment | dye, an antifouling agent, a moisturizer, water etc. can be contained.

  The oily cosmetic of the present invention can be produced by a usual method, and the dosage form may be any of solid, semi-solid, gel, liquid and the like.

The oily cosmetic of the present invention exhibits normal stress in viscoelasticity measurement. The normal stress is a stress that works to spread a surface generated in a direction perpendicular to the shear surface when shearing is applied to the material. Specifically, the cosmetic is crushed with a spatula in a glass petri dish, and kneaded until there is no lumps. Then, using a rotary viscoelasticity measuring device (for example, MCR-301, manufactured by Anton Paar), the diameter 25mm cone plate (CP25-2), at 30 ° C., a period from shear rate 0.001s ^-1 to 1000 s ^-1, when measuring 19 points equally divided in a logarithmic scale from a low shear rate side, shear A first normal stress difference N1 of 10 Pa or more is shown up to a speed of 1000 s ⁻¹ . A preferable range of the normal stress is 50 to 10,000 Pa, further 100 to 5000 Pa, particularly 300 to 3000 Pa at 1000 s ⁻¹ . When the normal stress is less than 50 Pa, the moist feeling decreases and the surface tends to feel rough. On the other hand, when the normal stress exceeds 10,000 Pa, the touch may become heavy or stringing may occur.

  The oily cosmetic of the present invention is a cosmetic that is used for skin, lips, eyelashes, nails, and hair, and has an oil agent as a continuous phase. Lip cosmetics such as lipstick, lip gloss, lip liner, mascara, eyeliner, eye shadow, teak, foundation, concealer, cream, milky lotion, serum, massage agent, deodorant, sunscreen, hair restorer, hair color, hair It can be a wax, a hair foam or the like, and is particularly suitable as a lip cosmetic.

Production Example 1 (Production of cellulose derivative 1)
Five grams (8.3 × 10 ⁻⁶ mol) of hydroxypropylcellulose (Celney M; manufactured by Nippon Soda Co., Ltd.) at room temperature in chloroform under nitrogen were mixed with 50 mL of pyridine and 0.17 grams (0.001 mol) of DMAP (dimethyl alcohol). Aminopyridine) was added and dissolved. 27.9 grams (0.101 mol) of palmitoyl chloride was added dropwise over 0.5 hours. Thereafter, the mixture was reacted at 50 ° C. for 15 hours, precipitated in methanol, purified, and dried to obtain hydroxypropylcellulose palmitate. (Weight average molecular weight 870,000, average acyl substitution degree is 85 mol% of all hydroxyl groups)

(Measurement of weight average molecular weight)
The average molecular weight (Mw) of the polymer was measured by gel permeation chromatography (GPC) using Hitachi L-6000 type high performance liquid chromatography. The eluent flow path pump was Hitachi L-6000, the detector was a Shodex RI SE-61 differential refractive index detector, and the column was a GMHHR-H double connected. The sample was adjusted to a concentration of 0.5 g / 100 mL with an eluent, and 20 μL was used. The eluent used was a 1 mmol / L dimethyldodecylamine chloroform solution. The column temperature was 40 ° C. and the flow rate was 1.0 mL / min.

(Measurement of average acyl (ester) substitution degree)
About 0.5 g of the cellulose derivative was precisely weighed, 4 mL of 5N sodium hydroxide and 25 mL of ethanol were added, and the mixture was refluxed at about 90 ° C. for 5 hours to completely hydrolyze the ester. After adding 30 g of water and refluxing at about 90 ° C. for 5 hours, it was neutralized with phosphoric acid, and it was confirmed with pH test paper that it was completely neutralized. After adding 70 g of tetrahydrofuran and stirring for 30 minutes and allowing to stand at room temperature for 3 hours, the amount of fatty acid was measured for the supernatant using Hitachi L-7000 high performance liquid chromatography. The detector used was Hitachi L-7400 (UV measurement) and measured at a wavelength of 210 nm, and THF: water: phosphoric acid = 60: 39: 1 was used as the eluent.

Production Example 2 (Production of cellulose derivative 2)
Five grams (8.3 × 10 ⁻⁶ mol) of hydroxypropylcellulose (Celney M; manufactured by Nippon Soda Co., Ltd.) at room temperature in chloroform under nitrogen were mixed with 50 mL of pyridine and 0.17 grams (0.001 mol) of DMAP (dimethyl alcohol). Aminopyridine) was added and dissolved. 20.8 grams (0.101 mol) of caproyl chloride was added dropwise over 0.5 hours. Thereafter, the mixture was reacted at 50 ° C. for 15 hours, precipitated in methanol, purified, and dried to obtain hydroxypropylcellulose capric acid ester. (Weight average molecular weight 700,000, average acyl substitution degree is 85 mol% of all hydroxyl groups)

Production Example 3 (Production of cellulose derivative 3)
Five grams (8.3 × 10 ⁻⁶ mol) of hydroxypropylcellulose (Celney M; manufactured by Nippon Soda Co., Ltd.) at room temperature in chloroform under nitrogen were mixed with 50 mL of pyridine and 0.17 grams (0.001 mol) of DMAP (dimethyl alcohol). Aminopyridine) was added and dissolved. 37.8 grams (0.101 mol) of behenoyl chloride was added dropwise over 0.5 hours. Thereafter, the mixture was reacted at 50 ° C. for 15 hours, precipitated in methanol, purified, and dried to obtain hydroxypropyl cellulose behenate. (Weight average molecular weight 1 million, average acyl substitution degree is 80 mol% of all hydroxyl groups)

Production Example 4 (Production of Cellulose Derivative 4)
To 5 grams (5 × 10 ⁻⁶ mol) of hydroxypropylcellulose (Celney SL; manufactured by Nippon Soda Co., Ltd.) at room temperature in chloroform under nitrogen, 50 mL of pyridine and 0.17 grams (0.001 mol) of DMAP (dimethylaminopyridine) ) Was added and dissolved. 27.9 grams (0.101 mol) of palmitoyl chloride was added dropwise over 0.5 hours. Thereafter, the mixture was reacted at 50 ° C. for 15 hours, precipitated in methanol, purified, and dried to obtain hydroxypropylcellulose palmitate. (Weight average molecular weight 150,000, average acyl substitution degree is 80 mol% of all hydroxyl groups)

Production Example 5 (Production of cellulose derivative 5)
To 8.3 grams (0.013 mol) of hydroxypropylcellulose (Celney H; manufactured by Nippon Soda Co., Ltd.) at room temperature in chloroform under nitrogen, 50 mL of pyridine and 0.17 grams (0.001 mol) of DMAP (dimethylaminopyridine) Was added and dissolved. 30.5 grams (0.101 mol) of palmitoyl chloride was added dropwise over 0.5 hours. Thereafter, the mixture was reacted at 50 ° C. for 15 hours, precipitated in methanol (or ethanol), purified, and dried to obtain hydroxypropylcellulose palmitate. (Weight average molecular weight 1,500,000, average acyl substitution degree is 70 mol% of all hydroxyl groups)

Production Example 6 (Production of cellulose derivative 6)
Five grams (8.3 × 10 ⁻⁶ mol) of hydroxypropylcellulose (Celney M; manufactured by Nippon Soda Co., Ltd.) at room temperature in chloroform under nitrogen were mixed with 50 mL of pyridine and 0.17 grams (0.001 mol) of DMAP (dimethyl alcohol). Aminopyridine) was added and dissolved. 9.0 grams (0.101 mol) of acetyl chloride was added dropwise over 0.5 hours. Thereafter, the mixture was reacted at 50 ° C. for 15 hours, precipitated in methanol, purified, and dried to obtain hydroxypropyl cellulose acetate. (Weight average molecular weight 700,000, average acyl substitution degree is 85 mol% of all hydroxyl groups)

Production Example 7 (Production of cellulose derivative 7)
Five grams (8.3 × 10 ⁻⁶ mol) of hydroxypropylcellulose (Celney M; manufactured by Nippon Soda Co., Ltd.) at room temperature in chloroform under nitrogen were mixed with 50 mL of pyridine and 0.17 grams (0.001 mol) of DMAP (dimethyl alcohol). Aminopyridine) was added and dissolved. 9.0 grams (0.031 mol) of palmitoyl chloride was added dropwise over 0.5 hours. Thereafter, the mixture was reacted at 50 ° C. for 15 hours, precipitated in methanol, purified, and dried to obtain hydroxypropylcellulose palmitate. (Weight average molecular weight 750,000, average acyl substitution degree is 30 mol% of all hydroxyl groups)

Examples 1-12, Comparative Examples 1-4
The oily cosmetics having the composition shown in Table 1 were produced, and the normal stress was measured, and the elongation at the time of application, the familiarity at the time of application, the smoothness immediately after application and with time, the non-stickiness and the feeling of application Evaluated. The results are also shown in Table 1.

(Production method)
The cellulose derivative was heated and dissolved at 80 ° C. with tridecyl isononanoate and hydrogenated polydecene and mixed uniformly to obtain an oily cosmetic.

(Evaluation method)
(1) Normal stress:
Sample preparation: The oily cosmetic was crushed with a spatula in a glass petri dish and kneaded until no lumps were found.
Measuring instrument: Rotary viscoelasticity measuring device (MCR-301 manufactured by Anton Paar).
Jig; 25mm diameter cone plate (CP25-2).
Measurement temperature: 30 ° C.
Nipping the sample between the plates was measured 19 points equally divided in logarithmic axis between the shear rate 0.001s ^-1 to 1000 s ^-1. The first normal stress difference N1 when the shear rate was 1000 s ⁻¹ was obtained.

(2) Good elongation during application (sensory evaluation):
Ten professional panelists performed sensory evaluation on the goodness of elongation when each oily cosmetic was applied to the skin. It was shown by the number of panelists evaluated as being good.

(3) Familiarity during application (sensory evaluation):
Ten professional panelists performed sensory evaluation on the familiarity (feeling of adhesion to the skin) when each oily cosmetic was applied to the skin. It was shown by the number of panelists evaluated as being good.

(4) Smoothness (sensory evaluation):
Ten professional panelists performed sensory evaluation on the smoothness of the coating film immediately after applying each oily cosmetic and after 3 hours. It was shown by the number of panelists evaluated as being good.

(5) No stickiness (sensory evaluation):
Ten professional panelists performed sensory evaluation on the non-stickiness immediately after applying each oily cosmetic and after 3 hours. It was shown by the number of panelists evaluated as good (not sticky).

(5) Coating feeling (sensory evaluation):
Ten professional panelists performed sensory evaluation on the feeling of application immediately after applying each oily cosmetic and after 3 hours. It was shown by the number of panelists evaluated as being good (apply feeling).

Examples 13-19
An oily cosmetic material having the composition shown in Table 2 was produced, and the normal stress was measured in the same manner as in Examples 1 to 12, and the elongation at the time of application, the familiarity at the time of application, immediately after application and over time The smoothness, non-stickiness, and coating feeling were evaluated. The results are also shown in Table 2.

(Production method)
Cellulose derivative 1 was heated and dissolved at 80 ° C. with tridecyl isononanoate, hydrogenated polydecene, and hydrogenated polyisobutene, and uniformly mixed to obtain an oily cosmetic.

Examples 20 and 21 (lipstick)
A lipstick having the composition shown in Table 3 was produced, and the normal stress was measured in the same manner as in Examples 1 to 12, and the elongation at the time of coating, the familiarity, the smoothness immediately after coating and the smoothness over time, and stickiness And the feeling of application were evaluated. Each evaluation was performed on the lips. The smoothness and non-stickiness are evaluations when lipstick is applied to the lips and the lips are rubbed together. The results are also shown in Table 3.

(Production method)
The base materials other than the color material were dissolved by heating and mixed uniformly. A coloring material raw material was added to this, uniformly dispersed with a disperser in a heated state, defoamed, poured into a mold and molded to obtain a lipstick.

Claims (4)

The following components (A), (B) and (C):
(A) The main chain has a cellulose skeleton, and 67 mol% or more of all hydroxyl groups are a group —O—M—R (M is CH ₂ or a carbonyl group C═O, and R is a straight chain having 3 to 40 carbon atoms. Or 0.1 to 20% by mass of a cellulose derivative substituted with a branched chain alkyl group or alkenyl group),
(B) 10 to 80% by mass of ester oil which is liquid at 25 ° C.
(C) 5-60 mass% of hydrocarbon oil that is liquid at 25 ° C.
An oily cosmetic comprising the components (B) and (C) in a mass ratio of (B) / (C) = 8/1 to 1/4. Component (C) is an oily cosmetic of claim 1, wherein it is intended to include liquid hydrocarbon oils having a number-average molecular weight of 1000-5000. Component (C) is an oily cosmetic of claim 1, wherein those comprising a number average molecular weight of 700 or less of the liquid hydrocarbon oil having a number average molecular weight of 1000 or more liquid hydrocarbon oil. The oily cosmetic according to any one of claims 1 to 3 , wherein the component (B) contains a branched saturated fatty acid ester.