JP6744823B2 - Oil-in-water emulsion composition - Google Patents

Description

The present invention relates to an oil-in-water emulsion composition containing a specific dextrin fatty acid ester, an ester of a fatty acid having 8 to 18 carbon atoms and a monohydric alcohol having 2 to 16 carbon atoms, and polyoxyethylene hydrogenated castor oil. The present invention relates to an oil-in-water emulsion composition which is excellent in non-greasiness, smoothness after finishing, and excellent in stability over time.

In recent years, with increasing awareness of hair care, hair cosmetics for treatments such as rinses and conditioners are desired to have a smoothing finish, suppleness, and a conditioning effect such as an emollient feeling. Various techniques are disclosed. For example, a technique of using a cationic polymer or a silicone derivative to enhance the suppleness of the finish (see, for example, Patent Documents 1 to 3), or a technique of imparting an emollient feeling to the finish using a hydrocarbon oil (eg, , Refer to Patent Document 4).

On the other hand, dextrin fatty acid ester having a high proportion of branched saturated fatty acid is blended in lipstick, eyeliner, mascara, foundation and the like as a material having excellent adhesiveness (tack property) (see, for example, Patent Document 5).

JP-A-6-312915 Special table 2001-504136 gazette JP-A-6-80538 JP-A-6-135823 International publication 2011/102123 pamphlet

However, in the technique of using a cationic polymer of Patent Document 1, when a large amount is blended for the purpose of imparting smoothness and suppleness, adsorption of the cationic polymer on the hair sometimes causes stiffness. Further, in the technique using the silicone derivative described in Patent Document 2 or Patent Document 3, the silicone derivative itself is difficult to dissolve in general oil, and the dosage form that can be contained may be limited. Since it has to be contained, the manufacturing process may be complicated. Further, with the technique of using a hydrocarbon oil in Patent Document 4, an emollient feeling can be obtained, but a sticky feeling after use derived from the oil is felt, or a heavy finish is obtained, and a good feeling of use is obtained. It was hard to be beaten.

On the other hand, in the technique of Patent Document 5, the dextrin fatty acid ester having a high proportion of branched saturated fatty acids is exemplified by lipstick, eyeliner, mascara, foundation and the like as a material having excellent tackiness. And no technique of combining specific surfactants is disclosed.

As described above, although the above-mentioned cosmetics are one aspect of the oil-in-water emulsion composition, the conventional techniques are smooth, without stickiness, and have a cohesive feeling and suppleness after use, regardless of the use of hair. It was difficult to obtain an oil-in-water type emulsion composition excellent in size.

Therefore, there is a need for the development of an oil-in-water emulsion composition that is not sticky, has an excellent feeling of lumpiness and suppleness after use, and provides smoothness on the hair surface, and the present invention aims to solve this problem. And

In view of such circumstances, the present inventor considered that an oil agent that coats the hair surface as a component that contributes to smoothness after finishing in hair cosmetics and can give a moist feeling is important. Then, as a result of examining various oil agents (liquid oil, solid oil, resin, wax, etc.), it was found that dextrin fatty acid ester having a high proportion of branched fatty acid and being hydrophobized is particularly useful. Since the dextrin fatty acid ester is a material having a high adhesiveness (tackiness), it may feel sticky at the time of use, but a fatty acid having 8 to 18 carbon atoms and a monohydric alcohol having 2 to 16 carbon atoms are used. It was found that the inclusion of the ester and the ester improves not only stickiness but also smoothness after finishing. Then, in order to use these oils in cosmetics and the like, as an emulsified composition, as a result of examining various surfactants, by emulsifying with polyoxyethylene hydrogenated castor oil, stability over time after emulsification It was found that an oil-in-water emulsion composition having excellent properties can be obtained, and the present invention has been completed.

That is, the present invention is
The following components (A) to (C);
(A) An esterified product of dextrin and a fatty acid, wherein dextrin has an average degree of polymerization of glucose of 3 to 150, and the fatty acid is one or more branched saturated fatty acids having 4 to 26 carbon atoms in total fatty acids. On the other hand, more than 50 mol% and 100 mol% or less, and a straight chain saturated fatty acid having 2 to 22 carbon atoms, a straight chain or branched unsaturated fatty acid having 6 to 30 carbon atoms and a cyclic saturated or unsaturated having 6 to 30 carbon atoms. Dextrin fatty acid ester containing one or more selected from the group consisting of fatty acids in an amount of 0 mol% or more and less than 50 mol% with respect to the total fatty acids and having a fatty acid substitution degree of 1.0 to 3.0 per glucose unit ( (B) An oil-in-water emulsion composition containing an ester (C) polyoxyethylene hydrogenated castor oil of a C8-18 fatty acid and a C2-16 monohydric alcohol.

An oil-in-water emulsion composition in which the branched saturated fatty acid constituting the dextrin fatty acid ester of the component (A) is one or more selected from branched saturated fatty acids having 12 to 22 carbon atoms.

An oil-in-water emulsion composition, wherein the dextrin fatty acid ester of the component (A) is a dextrin fatty acid ester which does not gelate liquid paraffin having a kinematic viscosity at 40° C. of 8 mm ² /s according to ASTM D445 measurement method. is there.

The dextrin fatty acid ester of the component (A) is a light liquid isoparaffin solution containing 40% by mass of the dextrin fatty acid ester, which is formed on a glass plate with an applicator having a thickness of 400 μm, and 100 g of the dried film is obtained using a texture analyzer. An oil-in-water emulsion composition which is a dextrin fatty acid ester having a load change (maximum stress value) of 30 to 1000 g applied to a contact point when a load is applied and held for 10 seconds and then released at 0.5 mm/second. Is.

The component (C) polyoxyethylene hydrogenated castor oil is an oil-in-water emulsion composition which is a polyoxyethylene hydrogenated castor oil having an HLB in the range of 6 to 13.

An oil-in-water emulsion composition in which the content mass ratio (B)/(A) of the component (A) and the component (B) is in the range of 1 to 100 is provided.

Further, the present invention provides an oil-in-water emulsion composition containing a liquid hydrocarbon at 25° C. as the component (D).

It is intended to provide an oil-in-water emulsion composition in which the average particle size of the emulsion droplets is 500 nm or less.

The present invention provides an oil-in-water emulsion composition which is used by spraying in a mist form.

An oil-in-water emulsion composition which is a cosmetic for hair is provided.

According to the present invention, it is possible to provide an oil-in-water emulsion composition which is excellent in non-greasiness, smoothness after finishing, and excellent in stability over time.

Hereinafter, the present invention will be specifically described with a particular focus on its preferred embodiment. In addition, in this specification, "-" shall mean the range including the numerical value before and behind.

The component (A) dextrin fatty acid ester used in the oil-in-water emulsion composition of the present invention is an esterification product of dextrin and a fatty acid, and the average degree of polymerization of glucose in the dextrin is 3 to 150, and the fatty acid is the whole. A substance containing more than 50 mol% of branched saturated fatty acids having 4 to 26 carbon atoms with respect to fatty acids and having a degree of substitution of fatty acids of 1.0 to 3.0 per glucose unit, which is combined with the component (B) described later. And can be stably dispersed in an oil-in-water emulsion composition.

The component (A) dextrin fatty acid ester used in the present invention has the following properties.
(1) The liquid oil does not gel when the dextrin fatty acid ester is mixed with the liquid oil.
“Liquid oil does not gel” means that when liquid paraffin having a kinematic viscosity at 40° C. according to ASTM D445 measurement method of 8 mm ² /s is used as liquid oil, dextrin fatty acid ester is 5% by mass (hereinafter simply “%”). The liquid paraffin contained therein is melted at 100° C., and when the viscosity is measured after 24 hours at 25° C., the viscosity is Yamaco DIGITAL VISCOMATE viscometer VM-100A (vibration type) (manufactured by Yamaichi Denki Co., Ltd.). Is below the detection limit of. In the case of gelation, it can be confirmed by detecting the viscosity.

(2) The film formed by the dextrin fatty acid ester has an adhesive force (tack property) within a specific range.
"Tackiness" means that the support is coated with the dextrin fatty acid ester and the other support is brought into surface contact from a state where they are separated from each other, and then the support is retracted and separated. When expressed by the load change (maximum stress value) applied to the contact point until, the light liquid isoparaffin solution containing 40% of the dextrin fatty acid ester is formed on a glass plate with a 400 μm thick applicator, and the film is dried, Texture analyzers such as Texture Analyzer TA. XTplus (manufactured by Stable Micro Systems Co., Ltd.) was used as a probe, and a columnar polyacetal resin (Delrin (registered trademark) DuPont Co., Ltd.) probe having a diameter of 12.5 mm was used. The change in load when separated at 5 mm/sec, that is, the tackiness is 30 to 1,000 g.

In the present invention, the dextrin used in the component (A) dextrin fatty acid ester is preferably a dextrin having an average glucose polymerization degree of 3 to 150, particularly 10 to 100. When the average degree of polymerization of glucose is 2 or less, the obtained dextrin fatty acid ester becomes wax-like and the solubility in the oil agent decreases. Further, when the average degree of polymerization of glucose exceeds 150, problems such as a high dissolution temperature of the dextrin fatty acid ester in the oil agent or poor solubility may occur. The sugar chain of dextrin may be linear, branched or cyclic.

In the present invention, the fatty acid used for the component (A) dextrin fatty acid ester essentially comprises one or more branched saturated fatty acids having 4 to 26 carbon atoms, and further a straight chain saturated fatty acid having 2 to 22 carbon atoms and carbon. One or more selected from the group consisting of a linear or branched unsaturated fatty acid having 6 to 30 carbon atoms and a cyclic saturated or unsaturated fatty acid having 6 to 30 carbon atoms (hereinafter, these having 4 to 26 carbon atoms). When the fatty acids other than the branched saturated fatty acids are collectively represented, they may be referred to as “other fatty acids”. The (A) dextrin fatty acid ester of the present invention is composed of only branched saturated fatty acids having 4 to 26 carbon atoms, or only branched saturated fatty acids having 4 to 26 carbon atoms and other fatty acids.

In the present invention, the composition ratio of the fatty acid in the component (A) dextrin fatty acid ester is such that one or two or more branched saturated fatty acids having 4 to 26 carbon atoms are more than 50 mol% and 100 mol% or less with respect to the total fatty acids, preferably Is 55 mol% or more and 100 mol% or less, and other fatty acids are 0 mol% or more and less than 50 mol%, preferably 0 mol% or more and 45 mol% or less.
Examples of the branched saturated fatty acid having 4 to 26 carbon atoms include isobutyric acid, isovaleric acid, 2-ethylbutyric acid, ethylmethylacetic acid, isoheptanoic acid, 2-ethylhexanoic acid, isononanoic acid, isodecanoic acid, isotridecanoic acid and isobutyric acid. Examples thereof include myristic acid, isopalmitic acid, isostearic acid, isoarachidic acid, isohexacosanoic acid, and one or more of these can be appropriately selected or used in combination. Of these, those having 12 to 22 carbon atoms are preferable, isostearic acid is particularly preferable, and there is no particular limitation on the difference in structure or the like.
In the present invention, isostearic acid means one kind of branched stearic acid or a mixture of two or more kinds. For example, 5,7,7-trimethyl-2-(1,3,3-trimethylbutyl)-octanoic acid is converted into a branched aldehyde having 9 carbon atoms by an oxo reaction of an isobutylene dimer, and then an aldol condensation of this aldehyde produces a carbon atom. It can be produced by forming a branched unsaturated aldehyde of Formula 18, followed by hydrogenation and oxidation (hereinafter abbreviated as "aldol condensation type"), which is commercially available from, for example, Nissan Chemical Industries. 2-Heptylundecanoic acid can be produced by dimerizing nonyl alcohol by the Gerbet reaction (also referred to as Guerbet reaction or Guerbet reaction) and oxidizing it, which is commercially available, for example, from Mitsubishi Chemical Co., Ltd. As a slightly different similar mixture, it is marketed by Nissan Chemical Industry Co., Ltd., and the type in which the starting alcohol is not linearly saturated and has two methyl branches is also marketed by Nissan Chemical Industry Co., Ltd. (hereinafter collectively referred to as "Gerbet reaction type"). (Omitted). Further, methyl-branched isostearic acid is obtained as a by-product during the production of dimers of oleic acid [eg J. Amer. Oil Chem. Soc. 51, 522 (1974)], for example, those commercially available from Emery Inc. in the United States (hereinafter abbreviated as “emery type”). Further starting materials for dimer acid, which is a starting material for emery-type isostearic acid, may include not only oleic acid but also linoleic acid, linolenic acid, and the like. In the present invention, this emery type is particularly preferable.

In the present invention, among the fatty acids used for the component (A) dextrin fatty acid ester, examples of the linear saturated fatty acid having 2 to 22 carbon atoms include, for example, acetic acid, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearin. Acid, arachidic acid, behenic acid, etc. are mentioned, and these 1 type(s) or 2 or more types can be used suitably selected or combined. Among these, those having 8 to 22 carbon atoms are preferable, and those having 12 to 22 carbon atoms are particularly preferable.

In the present invention, among the fatty acids used for the component (A) dextrin fatty acid ester, a straight chain or branched unsaturated fatty acid having 6 to 30 carbon atoms, for example, a monoene unsaturated fatty acid is cis-4-decene (obtuscil). ) Acid, 9-decene (caprorein) acid, cis-4-dodecene (lindell) acid, cis-4-tetradecene (tuzu) acid, cis-5-tetradecene (phycetellin) acid, cis-9-tetradecene (myristolein) ) Acid, cis-6-hexadecenoic acid, cis-9-hexadecene (palmitolein) acid, cis-9-octadecene (olein) acid, trans-9-octadecenoic acid (elaidic acid), cis-11-octadecene (asclepin) acid , Cis-11-eicosene (gondrain) acid, cis-17-hexacosene (ximene) acid, cis-21-triacontene (lumecene) acid, and the like, and as the polyene unsaturated fatty acid, sorbic acid, linoleic acid, Hilaric acid, punicic acid, α-linolenic acid, γ-linolenic acid, moloctic acid, stearidonic acid, arachidonic acid, eicosapentaenoic acid, sardonic acid, docosahexaenoic acid, nisinic acid, stearolic acid, clopenic acid, ximenic acid, etc. To be

In the present invention, among the fatty acids used for the component (A) dextrin fatty acid ester, a cyclic saturated or unsaturated fatty acid having 6 to 30 carbon atoms is saturated 6 to 30 carbon atoms having a cyclic structure in at least a part of the basic skeleton. Or an unsaturated fatty acid, for example, 9,10-methylene-9-octadecenoic acid; allepulic acid, allepuric acid, goluric acid, α-cyclopentylic acid, α-cyclohexyl acid, α-cyclopentylethyl acid, α-cyclohexylmethyl acid. , Ω-cyclohexyl acid, 5(6)-carboxy-4-hexyl-2-cyclohexene-1-octanoic acid, malvalic acid, sterculic acid, hydrocarboic acid, and shoalmoogric acid.

In the present invention, examples of the component (A) dextrin fatty acid ester in which a branched saturated fatty acid is used alone as a fatty acid include the following.
Dextrin isobutyric acid ester Dextrin ethyl methyl acetic acid ester Dextrin isoheptanoic acid ester Dextrin 2-ethylhexanoic acid ester Dextrin isononanoic acid ester Dextrin isodecanoic acid ester Dextrin isopalmitic acid ester Dextrin isostearic acid ester Dextrin isoarachinic acid ester Dextrin isohexacosanoic acid ester Dextrin (isovaleric acid/isostearic acid) ester

In the present invention, the component (A) dextrin fatty acid ester in the case of using a mixed fatty acid of a branched saturated fatty acid and another fatty acid as the fatty acid includes, for example, the followings.
Dextrin (isobutyric acid/caprylic acid) ester Dextrin (2-ethylhexanoic acid/caprylic acid) ester Dextrin (isoarachidic acid/caprylic acid) ester Dextrin (isopalmitic acid/caprylic acid) ester Dextrin (ethylmethylacetic acid/lauric acid) ester Dextrin (2-ethylhexanoic acid/lauric acid) ester Dextrin (isoheptanoic acid/lauric acid/behenic acid) ester Dextrin (isostearic acid/myristic acid) ester Dextrin (isohexacosanoic acid/myristic acid) ester Dextrin (2-ethylhexanoic acid/ Palmitic acid ester dextrin (isostearic acid/palmitic acid) ester dextrin (isostearic acid/isovaleric acid/palmitic acid) ester dextrin (isononanoic acid/palmitic acid/caproic acid) ester dextrin (2-ethylhexanoic acid/palmitic acid/stearin) Acid) ester dextrin (isodecanoic acid/palmitic acid) ester dextrin (isopalmitic acid/stearic acid) ester dextrin (isostearic acid/arachidic acid) ester dextrin (2-ethylhexanoic acid/arachidic acid) ester dextrin (2-ethylbutyric acid/ Behenic acid) ester dextrin (isononanoic acid/linoleic acid) ester dextrin (isopalmitic acid/arachidonic acid) ester dextrin (isopalmitic acid/caprylic acid/linoleic acid) ester dextrin (isostearic acid/stearic acid/oleic acid) ester dextrin ( Isoarachidic acid/palmitic acid/Shormoogulinic acid) ester

The degree of substitution of the fatty acid for the dextrin of the component (A) dextrin fatty acid ester is 1.0 to 3.0, preferably 1.2 to 2.8, per glucose unit. If the degree of substitution is less than 1.0, the dissolution temperature in liquid oil or the like becomes as high as 100° C. or higher, causing coloring and a peculiar odor, which is not preferable.

(Method for producing dextrin fatty acid ester)
Next, a method for producing the component (A) dextrin fatty acid ester used in the present invention will be described.
The manufacturing method is not particularly limited, and a known manufacturing method can be adopted. For example, it can be manufactured as follows.

(1) Dextrin having an average degree of polymerization of glucose of 3 to 150 and one or more kinds of branched saturated fatty acid derivatives having 4 to 26 carbon atoms are more than 50 mol% and 100 mol% or less with respect to all fatty acid derivatives, and 1 selected from the group consisting of a straight chain saturated fatty acid derivative having 2 to 22 carbon atoms, a straight chain or branched unsaturated fatty acid derivative having 6 to 30 carbon atoms, and a cyclic saturated or unsaturated fatty acid derivative having 6 to 30 carbon atoms. One kind or two or more kinds (hereinafter, when these fatty acid derivatives are collectively referred to as “other fatty acid derivative”) is reacted with a fatty acid derivative containing 0 mol% or more and less than 50 mol% of all fatty acid derivatives.

(2) dextrin having an average degree of polymerization of glucose of 3 to 150 is reacted with one or more kinds of branched saturated fatty acid derivatives having 4 to 26 carbon atoms, and then the product thereof and other fatty acid derivative React.
In that case, 1 type or 2 types or more of C4-C26 branched saturated fatty acid derivative is more than 50 mol% and 100 mol% or less, and other fatty acid derivative is 0 mol% with respect to all fatty acid derivative. Use at least 50 mol%.

In the present invention, as the fatty acid derivative used in the esterification reaction with the dextrin, for example, a halide or acid anhydride of the above fatty acid is used.
In both cases (1) and (2), first, dextrin is dispersed in a reaction solvent, and a catalyst is added if necessary. To this, a halide of the above fatty acid, an acid anhydride or the like is added and reacted. In the case of the production method of (1), these fatty acid derivatives are mixed and added at the same time, and in the case of the production method of (2), a branched saturated fatty acid derivative having low reactivity is first reacted, and then other The fatty acid derivative of is added and reacted.

In manufacturing, a preferable method among them can be adopted. As the reaction solvent, a formamide-based solvent such as dimethylformamide and formamide; an acetamide-based solvent; a ketone-based solvent; an aromatic compound-based solvent such as benzene, toluene, and xylene; and a solvent such as dioxane can be appropriately used. As the reaction catalyst, a tertiary amino compound such as pyridine or picoline can be used. The reaction temperature is appropriately selected depending on the raw material fatty acid and the like, but a temperature of 0°C to 100°C is preferable.

Examples of commercially available component (A) in the present invention include Unifilma HVY (manufactured by Chiba Flour Milling) and the like.

The content of the component (A) dextrin fatty acid ester used in the oil-in-water emulsion composition of the present invention is not particularly limited, but is preferably 0.02 to 10%, more preferably 0.03 to 5%. Preferably, 0.03 to 1% is particularly preferable. Within this range, an oil-in-water emulsion composition that is excellent in smoothness and excellent in stickiness can be obtained, which is preferable. In particular, the component (A) dextrin fatty acid ester of the present invention is an excellent one that exhibits a high conditioning effect even if it is a rinse-type product using a very small amount of compound or using in bath.

The component (B) of the present invention is an ester of a fatty acid having 8 to 18 carbon atoms and a monohydric alcohol having 2 to 16 carbon atoms. In the present invention, it is particularly preferable because it is excellent in compatibility with the component (A) and also has good stickiness. In the case where the number of carbon atoms is not within the above numerical range, in the case of an ester having a fatty acid having less than 8 carbon atoms or a monohydric alcohol having less than 2 carbon atoms as a constituent element, the molecular weight of the ester becomes small, so that There is a case where usability is impaired due to too good familiarity with the hair, or adhesion to hair or the like is deteriorated, an appropriate residual feeling is not produced, and as a result, suppleness of the hair cannot be obtained. On the other hand, if the fatty acid constituting the ester has more than 18 carbon atoms or the fatty acid of the monohydric alcohol has more than 16 carbon atoms, it may feel sticky or heavy when used, and the component (A) There is also a case where the compatibility with is not preferable.

Thus, the component (B) becomes an ester of a fatty acid having 8 to 18 carbon atoms and a monohydric alcohol having 2 to 16 carbon atoms, and more preferably, the fatty acid of the component (B) has 9 to 16 carbon atoms. , 9 to 14 are particularly preferable. Moreover, regarding the monohydric alcohol, the number of carbon atoms is more preferably 3 to 8, and particularly preferably 3 to 6. By using an ester obtained by combining a fatty acid having a more preferable carbon number range and a monohydric alcohol, it becomes more preferable from the viewpoint of suppleness of hair.

The component (B) is not particularly limited as long as it is used in ordinary cosmetics. Specifically, octyl octanoate, palmityl octanoate, isononyl isononanoate, isotridecyl isononanoate, ethyl laurate, hexyl octanoate hexyl laurate, ethyl myristate, butyl myristate, isopropyl myristate, ethyl palmitate, palmitate Examples thereof include isopropyl, octyl palmitate, isopropyl oleate, and ethyl oleate, and one or more of these may be used. Component (B) is particularly preferably isononyl isononanoate, isotridecyl isononanoate, ethyl oleate, isopropyl myristate, cetyl ethylhexanoate, ethylhexyl palmitate, and most preferably isopropyl myristate.

Examples of commercially available component (B) in the present invention include, for example, Saracos 99, 816, 913, P-8 (manufactured by Nisshin OilliO), CRODAMOL TN-LQ (manufactured by CRODA JAPAN), PALMESTER 1543 (manufactured by Nikon Corporation). PALM OLEO Co., Ltd.), IPM-EX (manufactured by Nippon Surfactant Industry Co., Ltd.) and the like.

The content of the component (B) in the present invention is not particularly limited, but is preferably 0.02 to 20%, more preferably 0.03 to 10%, particularly preferably 0.03 to 5%, Further, 0.05 to 1% is preferable. Within this range, it is possible to obtain an oil-in-water emulsion composition which is excellent not only in stickiness but also in smoothness after finishing.

In the present invention, the inclusion of the above-mentioned components (A) and (B) has more excellent effects such as smooth finish, but the content ratio by mass of these components should be within a specific range. Thereby, the effect can be further enhanced. The content mass ratio of the component (A) and the component (B) is not particularly limited, but as the component (B)/the component (A), it is preferably 1 to 100, and 1 to 50. Is more preferable. Within this range, it is more preferable because it maintains smoothness, has no stickiness, and is excellent in a feeling of cohesion and flexibility.

The component (C) polyoxyethylene hydrogenated castor oil used in the present invention is a surfactant used for emulsification, and by containing the component (C), the oil-in-water emulsion composition of the present invention can be obtained. The effect of improving stability over time can be obtained. The component (C) is not particularly limited as long as it is usually used in cosmetics, but polyoxyethylene hydrogenated castor oil having an HLB of 6 to 13 is more preferable. Specifically, polyoxyethylene (10 EO) hydrogenated castor oil (HLB6.5), polyoxyethylene (20 EO) hydrogenated castor oil (HLB10.5), polyoxyethylene (40 EO). Hydrogenated castor oil (HLB12.5) can be used, and one or more can be appropriately selected and used as necessary. When two or more kinds are used, the calculated value (weighted average value) of HLB may be one included in the above 6 to 13, but it is more preferable that the HLB alone contains one contained in this range. In particular, it is preferable that all are included in this range. As described above, by selecting and using the medium HLB type among the polyoxyethylene hydrogenated castor oil, it is possible to make the emulsified droplets fine, which is useful as an emulsifier.

Examples of commercially available component (C) in the present invention include, for example, EMALEX HC-10, 20, 40 (Nippon Emulsion Co., Ltd.), NIKKOL HCO-10, 20, and 40 (Nikko Chemicals Corp.), Uni. Ox HC-20, the same 40 (made by NOF Corporation), Marpon HC-40A (made by Matsumoto Yushi-Seiyaku Co., Ltd.), etc. are mentioned.

The content of the component (C) in the present invention is not particularly limited, but 0.003 to 5% is preferable, 0.005 to 2.5% is more preferable, and 0.005 to 1% is particularly preferable. preferable. Within this range, an oil-in-water emulsion composition that is preferable in terms of stability over time and excellent in non-greasiness can be obtained, which is preferable.

The present invention is an oil-in-water emulsion composition obtained by containing the components (A) to (C) described above, but it is possible to further contain a liquid hydrocarbon at 25° C. as the component (D). Is. When the component (D) contributes to the stability of the emulsified droplets as an oil to be emulsified in the oil-in-water emulsion composition, and when it is contained, it is compatible with the component (B) and the emulsified droplets are miniaturized. However, it is preferable in terms of stability over time. The component (D) is not particularly limited, and the origin of animal oil, vegetable oil, synthetic oil and the like is not limited. For example, hydrocarbons such as liquid paraffin, light liquid isoparaffin, dodecane, isododecane, tetradecane, isotetradecane, hexadecane, isohexadecane, squalane, vegetable squalane, polyisobutylene, polybutene, etc. can be exemplified. One kind or two or more kinds can be used. Among them, hydrocarbon oils having a molecular weight of 200 to 800 are preferable, and isododecane, isotetradecane, isohexadecane, squalane and the like are more preferable in terms of stability over time. It is known that a highly polar oil agent such as the component (B) generally easily causes Ostwald ripening and causes creaming and the like, and thus is not highly stable when emulsified. It is considered that the Ostwald ripening can be effectively suppressed by combining such a non-polar oil agent, and the temporal stability is improved.

The content of the component (D) in the present invention is not particularly limited, but 0.0001 to 1% is preferable, and 0.001 to 0.1% is more preferable. Within this range, it is possible to obtain an oil-in-water emulsion composition which is excellent not only in stability over time but also in non-stickiness.

Examples of commercially available component (D) in the present invention include, for example, Pearlream 4 (manufactured by NOF CORPORATION), purified polybutene HV-100F (SB) (manufactured by Japan Natural Products Co., Ltd.), Nisseki Polybutene HV-35/HV-. 100 (above, JX Nikko Nisseki Energy Co., Ltd.), Nomcoat HP30/HP100 (above, Nisshin OilliO Group Co., Ltd.), KLEARO L WHITE MINERAL OIL (SONNEBORN Co.), IP Solvent 2028MU (Idemitsu Kosan Co., Ltd.), Chloratum LES Examples include SQUALANE (manufactured by Croda Japan) (manufactured by Kishimoto Special Liver Oil Industry Co., Ltd.) and purified olive squalane (manufactured by Nikko Chemicals).

In the present invention, water is contained as an oil-in-water emulsion composition in addition to the above components (A) to (D). The water here is not particularly limited as long as it is usually used for cosmetics. Specifically, it may be purified water, hot spring water, deep water, or steam-distilled water of plants, and one or more of them may be appropriately selected and used as necessary. The blending amount is not particularly limited and may be appropriately blended depending on the amount of other components, but it is generally 20 to 99.9%, preferably 20 to 90%.

In the present invention, an oil-in-water emulsion composition can be obtained by using the above-mentioned component (C), but it can further contain a cationic surfactant in addition to the component (C). Such a cationic surfactant is a component that can be expected to have a conditioning effect on hair, and is not particularly limited as long as it is a cationic surfactant that can be usually used in cosmetics. Specifically, alkyl trimethyl ammonium chloride, stearyl trimethyl ammonium chloride, lauryl trimethyl ammonium chloride, cetyl trimethyl ammonium chloride, beef tallow alkyl trimethyl ammonium chloride, behenyl trimethyl ammonium chloride, stearyl trimethyl ammonium bromide, behenyl trimethyl ammonium bromide, dichloro chloride Stearyldimethylammonium, dicocoyldimethylammonium chloride, dioctyldimethylammonium chloride, di(POE)oleylmethylammonium chloride (2EO), benzalkonium chloride, stearyldimethylbenzylammonium chloride, lanolin-derived quaternary ammonium salt, dicocoil Ethylhydroxyethylmonium methosulfate, distearoylethylhydroxyethylmonium methosulfate, stearic acid diethylaminoethylamide, stearic acid dimethylaminopropylamide, behenic acid amidopropyldimethylhydroxypropylammonium chloride, stearoylcoraminoformylmethylpyridinium chloride, cetylpyridinium chloride , Tall oil oil alkylbenzyl hydroxyethyl imidazolinium and the like, and one or more of these can be appropriately selected and used.

The content of the cationic surfactant in the oil-in-water emulsion composition of the present invention is not particularly limited, but is preferably 0.01 to 10%, more preferably 0.1 to 5%. Within this range, the cosmetics are stable and the usability is better.

A phosphocholine group-containing polymer can be further used in the oil-in-water emulsion composition of the present invention. The phosphocholine group-containing polymer is not particularly limited as long as it has a phosphorylcholine group. The phosphocholine group-containing polymer has properties due to the phospholipid-like structure derived from biological membranes, so when used in cosmetics, it has a moisturizing effect on the skin and a film-forming effect on the hair. A hair repair effect based on is expected. Such a phosphocholine group-containing polymer is, more specifically, selected from a homopolymer of 2-methacryloyloxyethylphosphorylcholine (MPC) and a copolymer of 2-methacryloyloxyethylphosphorylcholine and a hydrophobic monomer. One or two or more types can be listed. In the present invention, the effect of reducing the sticky feeling and maintaining it can be expected. The phosphocholine group-containing polymer contained in the present invention is not particularly limited, but in the case of a homopolymer, the weight average molecular weight is preferably 5,000 or more, more preferably 10,000 or more. In the case of a copolymer with a hydrophobic monomer, the kind of the hydrophobic monomer is not particularly limited, but styrene, acrylic acid ester, and methacrylic acid ester are preferable. The weight average molecular weight of the copolymer with the hydrophobic monomer is also preferably 5,000 or more, more preferably 10,000 or more. Further, the constituent molar ratio of MPC to the hydrophobic monomer is preferably in the range of 50:50 to 97:3.

The content of the phosphocholine group-containing polymer in the present invention is not particularly limited, but is preferably 0.001 to 5%, more preferably 0.005 to 1%, and 0.01 to 0.5%. Is more preferable. Within this range, an oil-in-water emulsion composition having an excellent effect of maintaining a non-greasy feeling can be obtained, which is preferable.

Examples of commercially available phosphocholine group-containing polymer components include, as homopolymers of MPC, LIPIDURE-HM, LIPIDURE-HM-500, LIPIDURE-HM-600 (both manufactured by NOF CORPORATION), MPC and butyl methacrylate. Examples of the copolymer with are LIPIDURE-PMB, LIPIDURE A, LIPIDURE C, LIPIDURE-NA, LIPIDURE-NR, LIPIDURE-S (all manufactured by NOF Corporation) and the like.

The method for producing the oil-in-water emulsion composition of the present invention is not particularly limited and may be prepared by a conventional method. For example, the oil-based section containing the component (A) and the component (B) is dissolved by heating, And an aqueous fraction are mixed and stirred using a mixer or the like, and cooled to room temperature. An oil-in-water emulsion composition having excellent emulsion stability can be obtained by adding and mixing the component (C) during mixing and stirring. The component (C) may be mixed in either the aqueous system or the oil system.

The oil-in-water emulsion composition of the present invention, in addition to the above-mentioned components, in addition to the above-mentioned components, ordinary cosmetics and quasi-drugs, in addition to the components described above, in a quantitative range that does not impair the effects of the present invention depending on the purpose. Ingredients used in the formulation of external medicines, alcohols, powders for adjusting the feel or coloring, general-purpose ingredients such as surfactants, water-soluble polymers, film-forming agents, pearlescent agents, metallic soaps, Oily gelling agents, resins, clathrates, moisturizers, antibacterial/preservatives, deodorants, salts, pH adjusters, UV absorbers, antioxidants, chelating agents, antifading agents, defoamers, cooling agents , Cosmetic ingredients, propellants, fragrances, pigments, etc. may be contained.

The oil-in-water emulsion composition of the present invention is not particularly limited, but those having an average particle diameter of emulsified droplets of 500 nm or less are particularly preferable. Within this range, creaming is less likely to occur, stability over time is good, and it is easy to uniformly adhere to the skin or hair surface, which is particularly suitable for hair where uniformity is required. The average particle diameter of the emulsified droplets in the present invention is a value measured using a laser diffraction/scattering type particle size distribution measuring device (Horiba Ltd. laser diffraction/scattering type particle size distribution measuring device LA-910).

The oil-in-water emulsion composition of the present invention can be applied as a skin external preparation such as an external gel preparation, a cream preparation, an ointment preparation, a liniment preparation, a lotion preparation, a poultice preparation and a plaster preparation.

The oil-in-water emulsion composition of the present invention can be applied as a cosmetic. Specifically, hair lotions, emulsions, creams, eye creams, beauty essences, massages, packs, hand creams, body creams, cleansing agents, cleaning agents, sun care agents, and other skin care cosmetics, and hair styling agents. Examples thereof include cosmetics, powder foundations, liquid foundations, and makeup base cosmetics, and examples of their use include a method of using with a hand or cotton, a method of applying to a non-woven fabric or the like, and the like.

The oil-in-water emulsion composition of the present invention is in various forms such as liquid, emulsion, cream, gel, foam, mist, and solid depending on the combination with other components and the mechanism of the container. It can be carried out, and in particular, by spraying the oil-in-water emulsion composition of the present invention and a cosmetic containing the composition, or a skin external preparation in a mist form, it is thinly and uniformly applied to the skin and hair. This makes it possible to maximize the effect of imparting the moist feeling and smoothness according to the present invention without breaking makeup and hairstyle. Therefore, it is preferable that the cosmetic of the present invention is contained in a container capable of being atomized, such as an atomizer container, a trigger mist container, or an aerosol spray can.

In addition, the oil-in-water emulsion composition of the present invention is mixed with various propellants in a quantitative and qualitative range that does not impair the effects of the present invention depending on the purpose, and a hair foam, a spray foam, a hair mist, a hair spray, etc. Can be an aerosol product of As the propellant, liquefied petroleum gas, nitrogen gas, carbon dioxide gas, dimethyl ether or the like can be used.

The oil-in-water emulsion composition of the present invention can be used for the above-mentioned various uses, but is preferably used for hair. Specifically, it can be implemented as a hair rinse, a hair pack, a hair treatment using in bath, and a hair conditioner, a hair lotion, a split end coat agent, hair milk, a hair cream and the like products using out bath. From the viewpoint of the effect of the component (A), it is more preferable to use it for hair styling, even for hair.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited thereto.

<<Reference Production Example of Component (A) Dextrin Fatty Acid Ester of the Present Invention>>
The reference production examples of the dextrin fatty acid ester used in the present invention are shown below. Further, the substitution degree, mol% of constituent fatty acids, viscosity and tackiness were measured by the following methods.

(Method of measuring degree of substitution and mol% of constituent fatty acids)
The IR spectrum of the dextrin fatty acid ester of Reference Production Example was measured, and the substitution degree and mol% of the constituent fatty acids were determined from the amount of fatty acid after alkali decomposition and gas chromatography.

(Method of measuring viscosity)
Liquid paraffin containing 5% by mass of each sample (dextrin fatty acid ester of Reference Production Example) is dissolved at 100°C, and cooled to room temperature (25°C). The temperature was kept for 24 hours in a constant temperature bath at 25° C., and the viscosity was measured using the following measuring equipment.
The liquid paraffin used had a kinematic viscosity of 8 mm ² /s at 40° C. according to the ASTM D445 measuring method.
[Measurement equipment] Yamaco DIGITAL VISCOMATE MODEL VM-100A (manufactured by Yamaichi Electronics Co., Ltd.)

(Tackiness measurement method)
A solution in which 40% of each sample (dextrin fatty acid ester of Reference Production Example) was dissolved in IP Clean LX (light liquid isoparaffin) was applied to a glass plate with an applicator having a thickness of 400 μm, and the film was dried at room temperature for 24 hours and then at 70° C. After being stored for 12 hours at room temperature, tackiness at room temperature of 25° C. was evaluated by the following equipment and conditions.
[Measuring Equipment] Texture Analyzer TA. XTplus (manufactured by Stable Micro Systems)
[Probe] 1/2 Cyl. Delrin (polyacetal resin (POM) P/0.5), diameter 12.5 mm columnar [measurement condition] Test Speed: 0.5 mm/sec, Applied Force: 100 g, Contact Time: 10 sec

[Reference Production Example 1: Dextrin isostearic acid (emery type) ester]
21.41 g (0.132 mol) of dextrin having an average degree of glucose polymerization of 30 was dispersed at 70° C. in a mixed solvent consisting of 71 g of dimethylformamide and 62 g (0.666 mol) of 3-methylpyridine, and 120 g of isostearic acid chloride (emery type). (0.396 mol) was added dropwise over 30 minutes. After completion of the dropping, the reaction temperature was set to 80° C. and the reaction was performed for 5 hours. After the reaction was completed, the reaction solution was dispersed in methanol and the upper layer was removed. The semi-solid content was washed with methanol several times and then dried to obtain 107 g of a pale yellow resinous substance. (Branched saturated fatty acid 60mol% at the time of preparation)
The emery type starting material used was EMARSOL873 manufactured by Cognis. As the fatty acid composition of this raw material, a branched saturated fatty acid of 60 mol% and other fatty acids of 40 mol% (including palmitic acid of 10 mol%) were used. (Same below)
The degree of substitution was 2.2, the branched saturated fatty acid was 60 mol%, the other fatty acid was 40 mol% (internal palmitic acid was 10 mol%), the viscosity was 0 mPa·s, and the tackiness was 161 g.

[Reference Production Examples 2 to 4: Dextrin isostearic acid (emery type) ester]
According to the raw materials and methods described in Reference Production Example 1,
In Reference Production Example 2, 0.172 mol of isostearic acid chloride (emery type) was used with respect to 0.132 mol of dextrin having an average degree of glucose polymerization of 30, and dextrin isostearic acid (emery type) ester was obtained. (Branched saturated fatty acid 60mol% at the time of preparation)
The degree of substitution was 1.0, the branched saturated fatty acid was 60 mol %, the other fatty acid was 40 mol% (internal palmitic acid 10 mol %), the viscosity was 0 mPa·s, and the tackiness was 35 g.
In Reference Production Example 3, 0.224 mol of isostearic acid chloride (emery type) was used with respect to 0.132 mol of dextrin having an average degree of glucose polymerization of 30, to obtain dextrin isostearic acid (emery type) ester. (Branched saturated fatty acid 60mol% at the time of preparation)
The degree of substitution was 1.4, the branched saturated fatty acid was 60 mol%, the other fatty acid was 40 mol% (internal palmitic acid was 10 mol%), the viscosity was 0 mPa·s, and the tackiness was 45 g.
In Reference Production Example 4, 0.502 mol of isostearic acid chloride (emery type) was used with respect to 0.132 mol of dextrin having an average glucose polymerization degree of 30 to obtain a dextrin isostearic acid (emery type) ester. (Branched saturated fatty acid 60mol% at the time of preparation)
The degree of substitution was 2.6, the branched saturated fatty acid was 60 mol%, the other fatty acid was 40 mol% (internal palmitic acid was 10 mol%), the viscosity was 0 mPa·s, and the tackiness was 750 g.

[Reference Production Example 5: dextrin isostearic acid ester]
80 g of a pale yellow resinous substance was obtained in the same manner as in Reference Production Example 1 except that isostearyl chloride (Gerbet reaction type) was used instead of isostearyl chloride (Emery type). (100 mol% of branched saturated fatty acid at the time of preparation)
As a starting material for the gerbet reaction type, fine oxochol isostearic acid-N manufactured by Nissan Chemical Industries, Ltd. was used.
The substitution degree was 1.8, isostearic acid 100 mol%, the viscosity was 0 mPa·s, and the tackiness was 173 g.

[Reference Production Example 6: Dextrin isostearic acid ester]
60 g of a pale yellow resinous substance was obtained in the same manner as in Reference Production Example 1 except that isostearyl chloride (aldol condensation type) was used instead of isostearyl chloride (emery type). (100 mol% of branched saturated fatty acid at the time of preparation)
Fine oxochol isostearic acid manufactured by Nissan Chemical Industries, Ltd. was used as the aldol condensation type starting material.
The degree of substitution was 1.2, isostearic acid was 100 mol%, the viscosity was 0 mPa·s, and the tackiness was 61 g.

[Reference Production Example 7: dextrin isoarachidic acid/palmitate]
Dextrin (51.28 g) having an average glucose polymerization degree of 150 was dispersed in a mixed solvent of 150 g of dimethylformamide and 60 g of pyridine at 70° C., and a mixture of 132 g of isoarachidic acid chloride and 12 g of palmitic acid chloride was added dropwise over 30 minutes. After completion of the dropping, the reaction temperature was set to 80° C. and the reaction was performed for 5 hours. After the reaction was completed, the reaction solution was dispersed in methanol and the upper layer was removed. The semi-solid content was washed with methanol several times and then dried to obtain 145 g of a pale yellow resinous substance. (Branched saturated fatty acid 90mol% at the time of preparation)
The degree of substitution was 1.1, isoarachidic acid 85 mol%, palmitic acid 15 mol%, the viscosity was 0 mPa·s, and the tackiness was 45 g.

[Reference Production Example 8: dextrin isobutyric acid/capric acid ester]
34.19 g of dextrin having an average degree of glucose polymerization of 5 was dispersed in 215 g of 3-methylpyridine at 70° C., and a mixture of 50 g of isobutyric acid chloride and 60 g of capric acid chloride was added dropwise over 30 minutes. After completion of the dropping, the reaction temperature was set to 80° C. and the reaction was performed for 5 hours. After the reaction was completed, the reaction solution was dispersed in methanol and the upper layer was removed. The semi-solid content was washed with ethanol several times and dried to obtain 98 g of a pale yellow resinous substance. (Branched saturated fatty acid 60mol% at the time of preparation)
The degree of substitution was 2.9, isobutyric acid 63 mol%, capric acid 37 mol%, the viscosity was 0 mPa·s, and the tackiness was 255 g.

[Reference Production Example 9: Dextrin Isopalmitate]
23.62 g of dextrin having an average degree of polymerization of glucose of 100 was dispersed in a mixed solvent of 71 g of dimethylformamide and 62 g of 3-methylpyridine at 70° C., and 100 g of isopalmitic acid chloride was added dropwise for 30 minutes. After completion of the dropping, the reaction temperature was set to 80° C. and the reaction was performed for 5 hours. After the reaction was completed, the reaction solution was dispersed in methanol and the upper layer was removed. The semi-solid content was washed with methanol several times and dried to obtain 90 g of a pale yellow resinous substance. (100 mol% of branched saturated fatty acid at the time of preparation)
The degree of substitution was 2.0, isopalmitic acid 100 mol%, the viscosity was 0 mPa·s, and the tackiness was 204 g.

[Reference Production Example 10: Dextrin isononanoic acid/stearic acid ester]
36.34 g of dextrin having an average glucose polymerization degree of 20 was dispersed in a mixed solvent of 120 g of dimethylformamide and 62 g of 3-methylpyridine at 70° C., and a mixture of 41 g of isononanoic acid chloride and 58 g of stearic acid chloride was added dropwise over 30 minutes. .. After completion of the dropping, the reaction temperature was set to 80° C. and the reaction was performed for 5 hours. After the reaction was completed, the reaction solution was dispersed in methanol and the upper layer was removed. The semi-solid content was washed several times with methanol and dried to obtain 95 g of a pale yellow resinous substance. (Branched saturated fatty acid 55 mol% at the time of preparation)
The degree of substitution was 1.6, 51 mol% isononanoic acid, 49 mol% stearic acid, the viscosity was 0 mPa·s, and the tackiness was 64 g.

[Reference Production Example 11: Dextrin 2-ethylhexanoic acid/behenate]
54.56 g of dextrin having an average degree of glucose polymerization of 20 was dispersed in a mixed solvent composed of 150 g of dimethylformamide and 130 g of 3-methylpyridine at 70° C., and 147 g of 2-ethylhexanoic acid chloride and then 36 g of behenic acid chloride were applied over a total of 30 minutes. It dripped. After completion of the dropping, the reaction temperature was set to 80° C. and the reaction was performed for 5 hours. After the reaction was completed, the reaction solution was dispersed in methanol and the upper layer was removed. The semi-solid content was washed several times with methanol and dried to obtain 95 g of a pale yellow resinous substance. (Branched saturated fatty acid 90mol% at the time of preparation)
The substitution degree was 2.3, 2-ethylhexanoic acid 95 mol%, behenic acid 5 mol%, the viscosity was 0 mPa·s, and the tackiness was 138 g.

[Reference Production Example 12: dextrin isopalmitic acid/acetic acid ester]
22.56 g of dextrin having an average degree of glucose polymerization of 20 was dispersed in a mixed solvent composed of 71 g of dimethylformamide and 70 g of 3-methylpyridine at 70° C., and a mixture of 110 g of isopalmitic acid chloride and 10 g of acetic anhydride was added dropwise over 30 minutes. .. After completion of the dropping, the reaction temperature was set to 80° C. and the reaction was performed for 5 hours. After the reaction was completed, the reaction solution was dispersed in methanol and the upper layer was removed. The semi-solid content was washed with methanol several times and then dried to obtain 96 g of a pale yellow resinous substance. (Branched saturated fatty acid 80mol% at the time of preparation)
The substitution degree was 2.8, isopalmitic acid 79 mol%, acetic acid 21 mol%, the viscosity was 0 mPa·s, and the tackiness was 430 g.

[Reference Production Example 13: Dextrin isostearic acid (emery type)/oleic acid ester]
Dextrin having an average degree of polymerization of glucose of 40. It dripped over. After completion of the dropping, the reaction temperature was set to 80° C. and the reaction was performed for 5 hours. After the reaction was completed, the reaction solution was dispersed in methanol and the upper layer was removed. The semi-solid content was washed with methanol several times and dried to obtain 88 g of a pale yellow resinous substance. (Branched saturated fatty acid 54 mol% at the time of preparation)
The degree of substitution was 2.2, the branched saturated fatty acid was 54 mol%, the other fatty acid was 46 mol% (internal oleic acid was 10 mol%), the viscosity was 0 mPa·s, and the tackiness was 350 g.

Example 1: Hair mist of the present invention products 1 to 17 and comparative products 1 to 12 (for out bath)
A lotion-like hair mist was prepared according to the formulations shown in Tables 1 to 3 and the following production method, and the "evaluation stability", "non-stickiness", and "smoothness after finishing" were evaluated by the following evaluation methods and criteria. Evaluation evaluation was made, and the results are also shown in Tables 1 to 3.

(Production method)
A: Components 1 to 24 are heated to 80° C. and uniformly mixed.
B: Component 25 is heated to 80°C.
C: Add A to B, uniformly emulsify and mix, and cool.
D:C was filled in a container to obtain a hair mist (for out bath).

〔Evaluation method〕
The stability with time shows the result of observing by leaving still in a constant temperature bath set at 50° C. for 1 month. The evaluation was performed according to the following criteria.
[Results of accelerated test]: [Judgment]
No change compared to immediately after manufacturing: ◎
Creaming can be seen but can be easily redistributed by shaking lightly: ○
Separation or aggregation has occurred and does not redisperse even if shaken: ×
Emulsification cannot be performed and evaluation is not possible: −

We asked 10 panelists specializing in cosmetics evaluation to use the hair mist for out bath of the products 1 to 17 of the present invention and the comparative products 1 to 12 for "feeling of use (no stickiness)" and "smoothness after finishing". According to the following evaluation criteria, it was evaluated by 5 levels. After that, the average score of all panels was judged according to the following judgment criteria.
<Evaluation criteria>:
[Evaluation result]: [Score]
Very good: 5 points good: 4 points normal: 3 points slightly bad: 2 points poor: 1 point <criteria>:
[Average score]: [Judgment]
4.0 or higher: ◎
3.0 or more and less than 4.0: ○
2.0 or more and less than 3.0: △
Less than 2.0: ×

The hair mists of the present invention products 1 to 17 (for outbath) were all excellent in "stability over time", "feel of use (non-greasy)", and "smoothness after finishing".
Particularly, the product 1 of the present invention, which is a combination of the dextrin isostearate and isopropyl myristate of the present invention, has a high score of “smoothness of finish” while maintaining the “feel of use (non-stickiness)”. Was given. However, when different types of dextrin fatty acid ester are used as the component (A) like Comparative product 1, stickiness is felt during use and the smoothness after finishing is not excellent. Further, like the products 2 to 9 of the present invention, if the component (B) is of a type within the scope of the above claims, those having a high score of "feeling of use (no stickiness)" were obtained, but comparison was made. When the component (B) out of the range was used as in Products 2 to 8, stickiness was felt during use, or poor emulsification occurred immediately after production, and stable production was not possible. In addition, although an emulsifier is selected as the component (C), when used in the range of the invention products 10 to 13, it is excellent in "use feeling (no sticky feeling)" but also "stability over time". Is also excellent. Further, even in the case of different kinds such as comparative products 9 to 11, it is not possible to stably manufacture.
On the other hand, invention products 15 to 17 in which a hydrocarbon oil was added as the component (D) in addition to the ester oil of the component (B) of the product of the present invention, "feeling of use (no stickiness)", "smoothness of finish". The result was excellent in "stability over time" while maintaining "". It is known that a highly polar oil agent such as the component (B) generally easily causes Ostwald ripening and causes creaming and the like, and thus is not highly stable when emulsified. It is considered that the combination of such non-polar oil agents can effectively suppress the phenomenon of destabilizing the emulsification such as Ostwald ripening.
In any of the products of the present invention having these conditions, the average particle size of the emulsified droplets is 500 nm or less, low viscosity and high fluidity, filled in a non-aerosol type trigger type mist container, and also used as a mist. It is a liquid oil-in-water type emulsion composition which can be uniformly sprayed in the form of a liquid.

Example 2: Hair lotion (ingredient) (%)
1. Dipropylene glycol 1
2. Oleyl alcohol 0.1
3. Dicocoyl dimethyl ammonium chloride 0.5
4. Reference Production Example 2 dextrin fatty acid ester 0.1
5. Polyoxyethylene hydrogenated castor oil (20EO) 0.1
6. N-lauroyl-L-glutamate di(2-octyldodecyl)
0.1
7. Cetyl ethylhexanoate 0.2
8. Ethanol 10
9. Hydroxyethyl cellulose 0.1
10. Purified water remaining 11. Methylparaben 0.1
12. Cationized cellulose 0.1
13. Citric acid 0.01
14. Silylated silk peptide *3 0.1
15. Perfume 0.1
*3: Promois S-700SIG (manufactured by Seiwa Kasei)

(Production method)
A: Components 1 to 7 are uniformly dissolved at 70°C.
B: Ingredients 8 to 15 are added to A and mixed uniformly.
C: B was filled in a bottle container to obtain a hair lotion.

The hair lotion of Example 18 obtained as described above was an oil-in-water emulsion composition excellent in “stability over time”, “non-greasy”, and “smoothness after finishing”. Even when the dextrin fatty acid ester of Reference Production Example 7 is used in place of the dextrin fatty acid ester of Reference Production Example 2, good products are obtained in these items.

Example 3: Hair milk (ingredient) (%)
1 Propylene glycol 0.5
2 ethanol 5.0
3 Polyoxyethylene hydrogenated castor oil (40EO) 0.5
4 cetostearyl alcohol 1.0
5 Glyceryl monostearate 0.5
6 Dextrin fatty acid ester of Reference Production Example 3 0.3
7 Liquid paraffin 1.0
8 Isopropyl myristate 3.0
9 Alkyltrimethylammonium chloride solution (80%) *4 0.4
10 Phenoxyethanol 0.1
11 Methyl paraoxybenzoate 0.1
12 Stearyl trimethyl ammonium chloride (80%) *5 0.2
13 Purified water Residual amount 14 LIPIDURE-PMB 0.02
15 (bisbutyroxy amodimethicone/PEG-60) copolymer
0.2
16 Polyoxyethylene (10) methyl glucoside 2.0
17. Amino-modified silicone emulsion *6 3.0
18. Lysine dilauroyl glutamate Na*7 0.2
*4: Lipocard 22-80 (manufactured by Lion Corporation)
*5: GENEMIN STAC (made by Clariant Japan)
*6: SM8904 COSMETIC EMULSION (Toray Dow Corning)
*7: Pericea L-30 (manufactured by Asahi Kasei Chemicals Corporation)

(Production method)
A: Components 3 to 11 are heated and mixed uniformly.
B: Components 12 and 13 are heated and mixed uniformly.
C: A and B were mixed, components 1, 2 and 14 to 18 were added to obtain hair milk.

The hair cream of Example 3, which is an embodied product of the present invention, was an oil-in-water emulsified composition excellent in “temporal stability”, “non-greasy”, and “smoothness after finishing”.

Example 4: Hair spray (undiluted solution) (%)
1 Polyoxyethylene hydrogenated castor oil (10 EO) 2.5
2 Dextrin fatty acid ester of Reference Production Example 4 0.1
3 Amodimethicone 1.0
4 Isononyl isononanoate 0.5
5 Perfume 0.5
6 Camellia oil 0.5
7 Ethylhexyl methoxycinnamate 0.1
8 N-lauroyl-L-glutamic acid di(phytosteryl.
Behenyl 2-octyldodecyl) 0.1
9 Argania Spinosa Nuclear Oil 0.1
10 L-serine 0.5
11 1,3-butylene glycol 0.5
12 Ethanol remaining amount

(Production method)
A: Components 1 to 11 are heated and uniformly mixed, then cooled to 35° C., and 12 is added and mixed.
B: 55 parts of the stock solution of A was filled with 55 parts of a propellant (dimethyl ether) in an aerosol container to obtain a hair spray.

The hair spray of Example 4, which is an embodiment of the present invention, was an oil-in-water emulsion composition excellent in "stability over time", "no stickiness", and "smoothness after finishing". Even when the dextrin fatty acid ester of Reference Production Example 9 is used in place of the dextrin fatty acid ester of Reference Production Example 4, good products are obtained in these items.

Example 5: Daytime beauty essence (ingredient) (%)
1 Polyoxyethylene hydrogenated castor oil (20EO) 0.1
2 1,3-butylene glycol 12.0
3 Methylparaben 0.1
4 Purified water 4.3
5 Acrylic acid-acryloyl dimethyl taurine sodium copolymer *8
1.5
6 Purified water Residual amount 7 Ethanol 10.0
8 Dextrin fatty acid ester of Reference Production Example 5 0.1
9 Isotridecyl isononanoate 1.0
10 Ethylhexyl methoxycinnamate 7.5
11 Dimethicone 2.5
12 Cyclomethicone 1.0
13 Astaxanthin *9 0.01
*8: SIMULGEL EG (manufactured by SEPPIC)
*9: Astaxanthin 5-C (manufactured by Oriza Yuka)

(Production method)
A: Components 1 to 4 are heated and dissolved uniformly.
B: Swell components 5, 6, and 7.
C: Components 8 to 13 are heated to 80° C. and mixed uniformly.
D: A and B are uniformly dispersed and heated to 80°C.
E: C was added to D to emulsify, and after cooling, a daytime beauty essence was obtained.

The daytime beauty essence of Example 5, which was a product of the present invention, was an oil-in-water emulsion composition excellent in "stability over time", "no stickiness", and "smoothness after finishing".

Claims (10)

The following components (A) to ( D );
(A) An esterified product of dextrin and a fatty acid, wherein dextrin has an average degree of polymerization of glucose of 3 to 150, and the fatty acid is one or more branched saturated fatty acids having 4 to 26 carbon atoms in total fatty acids. On the other hand, more than 50 mol% and 100 mol% or less, and a straight chain saturated fatty acid having 2 to 22 carbon atoms, a straight chain or branched unsaturated fatty acid having 6 to 30 carbon atoms and a cyclic saturated or unsaturated having 6 to 30 carbon atoms. Dextrin fatty acid ester containing one or more selected from the group consisting of fatty acids in an amount of 0 mol% or more and less than 50 mol% with respect to the total fatty acids and having a fatty acid substitution degree of 1.0 to 3.0 per glucose unit ( B) Ester of fatty acid having 8 to 18 carbon atoms and monohydric alcohol having 2 to 16 carbon atoms (C) Polyoxyethylene hydrogenated castor oil ( D ) Water containing hydrocarbon which is liquid at 25°C Oil-based emulsion composition. The oil-in-water emulsion composition according to claim 1, wherein the branched saturated fatty acid that constitutes the dextrin fatty acid ester of the component (A) is one or more selected from branched saturated fatty acids having 12 to 22 carbon atoms. The oil-in-water type according to claim 1 or 2, wherein the dextrin fatty acid ester of the component (A) is a dextrin fatty acid ester which does not gelate liquid paraffin having a kinematic viscosity at 40°C of 8 mm ² /s according to ASTM D445 measurement method. Emulsified composition. The dextrin fatty acid ester of the component (A) is a light liquid isoparaffin solution containing 40% by mass of the dextrin fatty acid ester, which is formed on a glass plate with an applicator having a thickness of 400 μm, and 100 g of the dried film is obtained using a texture analyzer. The dextrin fatty acid ester having a load change (maximum stress value) of 30 to 1000 g applied to a contact point when a load is applied and held for 10 seconds and then separated at 0.5 mm/second. Oil-in-water emulsion composition of. The oil-in-water emulsion composition according to any one of claims 1 to 4, wherein the polyoxyethylene hydrogenated castor oil of the component (C) is a polyoxyethylene hydrogenated castor oil having an HLB in the range of 6 to 13. The oil-in-water emulsion composition according to any one of claims 1 to 5, wherein the mass ratio (B)/(A) of the components (A) and (B) is in the range of 1 to 100. Oil-in-water emulsified composition according to any one of claims 1 to 6 average particle size of the emulsified droplets is 500nm or less. The oil-in-water emulsion composition according to any one of claims 1 to 8 , which is used by spraying in a mist form. Oil-in-water emulsified composition according to any one of claims 1-8 is hair cosmetic. A mist cosmetic comprising the oil-in-water emulsion composition according to any one of claims 1 to 9 housed in a container capable of being atomized.