JP5178100B2 - Topical skin preparation - Google Patents

Description

The present invention relates to an oil-in-water emulsified composition, and more particularly, to maintain water and oil stably even at a relatively low viscosity while having a familiar and very refreshing feel. The present invention relates to an oil-in-water emulsion composition that can be used.

There is a need for cosmetics that stably contain water and oil in order to impart appropriate moisture to the skin. In normal cosmetics, in order to maintain the emulsion stability, the emulsion particles are made finer using a surfactant, and the outer phase is made of a water-soluble polymer such as polyacrylic acid or a thickening polysaccharide, or a water-swellable polymer. A technique of thickening with clay minerals is often used.

Since cosmetics have a great feeling of use when applied to skin and affect preference evaluation, various ideas have been made to impart a refreshing feel without stickiness. Nonionic surfactants are widely used in the fields of cosmetics, foods, etc. from the viewpoint of safety, etc., but hydrophilic nonionic surfactants used in the preparation of oil-in-water emulsion compositions are intramolecular. Has an EO chain, sucrose, etc., and has a specific stickiness. In addition, water-soluble polymers used as thickeners also cause a feeling of stickiness just before being dry or dry, so attempts have been made to reduce the amount of these hydrophilic surfactants and polymers as much as possible or not to mix them at all.

As an attempt to reduce the amount of the surfactant, there is a technique (Patent Documents 1 and 2) in which an alkyl-modified polymer is used instead of the surfactant or an amphiphilic powder is used. Also, as an attempt to reduce the amount of water-soluble polymer thickener, it is common to use clay minerals instead of polymers, but clay minerals alone have problems such as water separation over time. Acid or xanthan gum is used in combination with clay.

As an attempt to prepare an emulsion in which both the surfactant and the polymer are reduced or removed, a clay mineral in which a synthetic swellable layered silicate is blended in the outer water phase and the oil swellable or hydrophobized in the inner oil phase A method for preparing an oil-in-water type emulsion composition by blending the above has been reported (Patent Documents 3 to 6). However, water-swellable clay minerals and oil-swellable clay minerals have poor surface activity, so the stability of oil droplets to coalesce and water separation is insufficient. It is essential to make it high, and it has been difficult to prepare an emulsion preparation.

In addition, a technique for preparing a stable oil-water mixture without using a surfactant by solidifying both an oil phase and an aqueous phase with a solid oil component and a semi-solid moisturizing agent has been introduced (Patent Document 7). ), Because the preparation is solidified, it is limited to creams that feel like a hard ointment.

In addition, by using an organically modified layered silicate powder, an attempt has been made to prepare a stable giant emulsion substantially free from a surfactant and further without thickening the outer phase (Patent Document 8). ). However, in this system, since the external phase is not thickened, the particles cannot be efficiently refined, and the emulsion is limited to an emulsion having a particle size of 0.5 mm to 10 mm.

As described above, a technique for preparing an emulsion oil-in-water emulsion composition with a small amount of the hydrophilic surfactant and the water-soluble polymer has not yet been established. The term “milky liquid” as used herein refers to a preparation having a viscosity that can flow when the container is tilted, and more specifically, a preparation having a viscosity of 1000 to 13000 mPa · s at 25 ° C.

As a method for emulsifying a water-swellable layered silicate in combination with a polymer, it is generally used in combination with a nonionic polymer or an anionic polymer. Specifically, water-swellable clay + xanthan gum and the like (Patent Document 9), bentonite + specific (meth) acrylic acid copolymer (Patent Document 10), clay mineral + acrylic acid-based water-absorbing polymer (Permit Document 11) And others (Patent Documents 12 to 14). Nonionic or anionic polymers and water-swellable layered silicates have almost no interaction, so there is only an additive effect as a thickening effect. Therefore, it has not been possible to prepare a preparation with less sliminess of the polymer.

There are few examples of using cationic polymers in combination with water-swellable layered silicates. Specifically, it has been shown that by using a water-swellable clay and a water-soluble chitin which is a cationic polymer, a gel having good stability can be obtained even if the amount of both is relatively small ( Patent Document 15). However, it does not mention whether the amount of surfactant can be reduced. In addition, in the study of a thickening composition using a water-swellable clay and a specific quaternary ammonium polymer (Patent Document 16), there is no mention as to whether an emulsion with a reduced amount of surfactant can be prepared.
JP-T-2001-518111 JP-A-8-169808 Japanese Patent Laid-Open No. 2002-47121 Japanese Patent Laid-Open No. 2002-370917 JP 2003-34609 A JP 2006-1913 A Japanese Patent No. 3648249 JP 2004-2275 A JP-A 61-194014 JP-A-56-47477 JP-A-11-188253 Japanese Patent Laid-Open No. 10-45565 JP 2002-191959 A JP 2006-241152 A JP-A 63-275507 Japanese National Patent Publication No. 4-500522

The present invention does not contain a hydrophilic surfactant that causes stickiness, and has a small amount of water-soluble polymer that causes sliminess and film feeling, and stably contains water and oil even at low viscosity. An object of the present invention is to provide an oil-in-water emulsion composition having a good feeling of use.

As a result of diligent research to solve the conventional problems,
By combining (a) a water-swellable layered silicate, (b) a cationic polymer, (c) a nonionic surfactant of HLB8 or less, (d) oil, and (e) water, The present inventors have found that an oil-in-water emulsion composition having good emulsification stability at low viscosity, not sticky, and having a familiar usability can be obtained, and the present invention has been completed.

That is, the present invention is based on the total amount of the composition, (a) 0.5 to 5.0% by mass of the water-swellable layered silicate, and (b) 0.01 to 0.5% by mass of the cationic polymer. When a 0.05 to 0.7 mass% of (c) HLB 8 or less of the nonionic surfactant, and 1.0 to 30 wt% (d) is an oil, contain and (e) water, the following ( The present invention relates to an oil-in-water emulsion composition that satisfies the conditions 1) to (3).
(1) (c) The blending amount of the nonionic surfactant of HLB 8 or less is 5% by mass or less of the blending amount of (d) oil.
(2) At 25 ° C., the viscosity is 1000 to 13000 mPa · S.
(3) The blending weight ratio of (a) water-swellable layered silicate and (b) cationic polymer is 100: 1 to 10: 1.

The oil-in-water emulsion composition of the present invention has good emulsification stability even at low viscosity, is non-sticky, and has a familiar usability.

The oil-in-water emulsion composition of the present invention comprises (a) a water-swellable layered silicate, (b) a cationic polymer, (c) a nonionic surfactant having an HLB of 8 or less, (d) an oil, (E) Water is contained as an essential component.

The (a) water-swellable layered silicate used in the oil-in-water emulsified composition of the present invention has a swelling property, that is, has a property that water penetrates between crystal layers in water and swells. It may be obtained. The water-swellable layered silicate is dispersed in the form of flaky fine crystals in water. As the water-swellable layered silicate used in the present invention, generally, natural or synthetic Na-type tetrasilicic fluorine mica, Li-type tetrasilicic fluorine mica, Na-type fluorine teniolite, Li-type fluorine teniolite, etc. Examples thereof include mica group clay minerals and smectite group clay minerals such as vermiculite, hectorite, saponite, stevensite, viterite, montmorillonite, nontronite and bentonite, or substitutions and derivatives thereof, or mixtures thereof. Incidentally, the substitution body, which part of the Na ⁺ or Li ⁺ ions of the interlayer ions are K ⁺ ion substitution, in which a part of the tetrahedral sheet of Si ⁺ ions are replaced with Mg ²⁺ ions Is included.

Commercially available products include Somasif ME-100 (synthetic swellable mica manufactured by Coop Chemical Co., Ltd.), SUBMICA E (synthetic swellable mica manufactured by LCW, France), and Lucentite SWN (manufactured by Coop Chemical Co., Ltd.). Synthetic smectite), Lucentite SWF (synthetic smectite manufactured by Coop Chemical Co., Ltd.), Daimonite (synthetic swellable mica manufactured by Topy Industries, Ltd.), Laponite XLG (synthetic hectorite analog manufactured by Laporte, UK), Laponite RD (synthetic hectorite analogue by Laport, UK), Thermabis (synthetic hectorite analogue by Henkel, Germany), Smecton SA-1 (similar saponite by Kunimine Industries, Ltd.) Natural montmorillonite), Kunipia F (natural morimori sold by Kunimine Industry Co., Ltd.) Knight), Veegum (USA, natural saponite manufactured by Vanderbilt Co.), Benton EW (US, natural hectorite), such as elementary infantis, Inc. and the like.

The blending amount of (a) in the oil-in-water emulsion composition of the present invention is 0.5 to 5.0% by mass, preferably 1.0 to 3.0% with respect to the total amount of the oil-in-water emulsion composition. % By mass. If it is less than 0.5% by weight, sufficient viscosity as an emulsion cannot be obtained, and if it exceeds 5.0% by weight, a squeaky feeling peculiar to water-swelling clay can be felt, and the appearance is also creamy. It becomes.
In the oil-in-water emulsion composition of the present invention, one or more of water-swellable layered silicates can be blended.

The cationic polymer (b) used in the oil-in-water emulsion composition of the present invention is specifically a poly (dimethyldiallylammonium halide) type cationic polymer [commercially available products such as Marcote (manufactured by Nalco), etc.] , Dimethyldiallylammonium halide and acrylamide copolymer cationic polymer [commercially available products such as Marquat 550 (manufactured by Nalco), etc.] and quaternary nitrogen-containing cellulose ether [commercially available products are polymer JR-400, polymer JR-125, polymer JR-30M (manufactured by Dow Chemical Co., Ltd.), kachinal HC-200, kachinal LC-200 (manufactured by Toho Chemical Co., Ltd.), etc.], quaternary nitrogen-containing locust bean gum, quaternary nitrogen-containing Guar gum, or polyethylene glycol, epichlorohydrin, propyleneamine, Copolymers of ilamine [commercially available products such as Polycoat H (manufactured by Henkel, West Germany)], polyethylene glycol, epichlorohydrin, coconut oil alkylamine, dipropylenetriamine condensate [commercially available product (Polycoat NH) (Henkel, West Germany) Etc.), or a vinyl pyrrolidone / dimethylaminoethyl methacrylate copolymer cationized product [commercially available products such as Guff Coat 755, Guff Coat 734 (manufactured by GAF, USA), etc.]. Of these, quaternary nitrogen-containing cellulose ether is preferably used in the present invention. The higher the nitrogen content, the stronger the interaction with the water-swellable silicate. If it is too high, it may cause water separation. Desirably, it is 0.1 to several percent.

The blending amount of (b) in the oil-in-water emulsion composition of the present invention is 0.01 to 0.5% by mass, preferably 0.02 to 0.2%, based on the total amount of the oil-in-water emulsion composition. % By mass. If it is less than 0.01% by weight, the interaction with the water-swellable layered silicate is weak and the thickening effect is low. On the other hand, when the content is more than 0.5% by weight, a polymer film feeling is felt, which is not preferable.
In the oil-in-water emulsion composition of the present invention, one or more of the cationic polymers can be blended. In the present invention, a cationic polymer having a molecular weight of about several tens of thousands to several millions is preferably used.

Water-swellable layered silicate (hereinafter sometimes referred to as clay mineral) has a charge on the surface portion and the end surface portion. In general, the end surface is positively charged at a low pH to a neutral region and positively at a high pH, but the surface portion is always negatively charged, and the zeta potential of the clay particles is negative. Therefore, when mixed with a cationic polymer, aggregation occurs due to electrostatic interaction with the water-swellable layered silicate to form a complex, resulting in thickening. The formation of a complex by the interaction between the water-swellable layered silicate and the cationic polymer can also be confirmed by IR, but more easily can also be confirmed by the appearance of white turbidity. The interaction between the water-swellable layered silicate and the cationic polymer has been used in the field of soil improvement for a long time, but there are few examples applied to cosmetics and foods. The interaction between such a water-swellable layered silicate and a polymer is not a nonionic polymer or an anionic polymer, or is very weak, and has little or no thickening effect even when mixed. Therefore, by using a mixture of a water-swellable layered silicate and a cationic polymer, it is possible to make a gel having a desired viscosity with a small blending amount.

The mixing ratio of (a) water-swellable layered silicate and (b) cationic polymer is preferably (a) :( b) = 100: 1 to 10: 1. Even if the blending ratio of the cationic polymer is less than 100: 1 or more than 10: 1, the synergistic effect of thickening by mixing becomes weak.

The composite obtained by the interaction of the water-swellable layered silicate and the cationic polymer has a weak surface active ability, so that an oil-in-water emulsified composition of coarse particles without blending a surfactant Product can be prepared. However, those that do not contain a surfactant are easily demulsified due to the shear, and therefore have poor stability, and oil floating is also observed.

Accordingly, it was found that as a result of adding a small amount of nonionic surfactant in the oil phase for the purpose of reducing the oil-water interfacial tension, fine emulsified particles can be obtained and a stable oil-in-water emulsion composition can be prepared. Since the composite of water-swellable layered silicate and cationic polymer has a function as a weak hydrophilic surfactant, it is not a hydrophilic surfactant or a hydrophilic nonionic surfactant, A stable oil-in-water emulsion composition can be prepared by using a nonionic surfactant having an HLB of 8 or less, which is hydrophobic with less stickiness. Further, by having a function as a weak hydrophilic surfactant, the complex is adsorbed on the oil-water interface, and plays a role of preventing emulsified particles from being united even at low viscosity.

Specific examples of the nonionic surfactant (c) having an HLB of 8 or less used in the oil-in-water emulsion composition of the present invention include polyoxyethylene-added (hereinafter abbreviated as POE) oleyl ether, POE stearyl ether, POE lauryl ether. , POE alkylphenyl ether, POE behenyl ether, POE-decyl pentadecyl ether, POE-decyl tetradecyl ether, POE-decyl tetradecyl ether, POE-octyl decyl ether, and other ether type active agents, and POE (cured castor oil, Ester type activators such as POE fatty acid monoester, POE fatty acid diester, POE sorbitan fatty acid ether, POE glyceryl monoisostearate, POE glyceryl triisostearate, POE hydrogenated castor oil monoisostearate , Ethylene oxide addition type surfactants such as ether ester type activator such as POE hydrogenated castor oil triisostearate, and decaglyceryl tetraoleate, hexaglyceryl triisostearate, tetraglyceryl diisostearate, diglyceryl di Polyglycerin fatty acid esters such as isostearate, polyhydric alcohol fatty acid ether type surfactants such as glyceryl fatty acid esters such as glyceryl monoisostearate and glyceryl monooleate, sucrose fatty acid esters such as sucrose tetraerucate, nonionic modification Silicone activator, for example, modified silicone such as dimethylpolysiloxane polyoxyalkylene copolymer represented by the following formula (I),
Wherein R ¹ represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms; m represents an average of 1 to 150; n represents an average of 1 to 50; a and b are (Represents a number from 0 to 35 on average)

The blending amount of (c) in the oil-in-water emulsion composition of the present invention is 0.05 to 0.7% by mass with respect to the total amount of the oil-in-water emulsion composition. If it is less than 0.05%, there is no effect of improving the emulsion stability, and if it is added more than 0.7% by mass, it feels sticky if not as much as a hydrophilic surfactant, and in some cases, in oil A water-type emulsion composition will be prepared.

The oil (d) used in the oil-in-water emulsion composition of the present invention is not particularly limited as long as it is an oil component that is usually blended in cosmetics. For example, hydrocarbons such as liquid paraffin, squalane and petrolatum, synthetic ester oils such as isopropyl myristate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate Hexyldecyl dimethyloctanoate, cetyl lactate, myristyl lactate, lanolin acetate, isocetyl stearate, isocetyl isostearate, cholesteryl 12-hydroxystearylate, ethylene glycol di-2-ethylhexylate, dipentaerythritol fatty acid ester, monoisostearic acid N -Alkyl glycol, neopentyl glycol dicaprate, diisostearyl malate, di-2-heptyl undecanoic acid glycerin, tri- -Trimethylolpropane ethylhexylate, trimethylolpropane triisostearate, pentane erythritol tetra-2-ethylhexylate, glycerin tri-2-ethylhexylate, trimethylolpropane triisostearate, cetyl 2-ethylhexanoate, 2-ethylhexyl palmi Tate, isononyl 2-ethylhexanoate, 2-ethylhexyl 2-ethylhexanoate, isononyl isononanoate, glyceryl trimyristate, glyceride tri-2-heptylundecanoate, castor oil fatty acid methyl ester, oleic acid oil, cetostearyl alcohol, Acetoglyceride, 2-heptylundecyl palmitate, diisobutyl adipate, N-lauroyl-L-glutamic acid-2-octyldodecyl ester , Di-2-heptylundecyl adipate, ethyl laurate, di-2-ethylhexyl sebacate, 2-hexyldecyl myristate, 2-hexyldecyl palmitate, 2-hexyldecyl adipate, diisopropyl sebacate, succinate Examples include 2-ethylhexyl acid, ethyl acetate, butyl acetate, amyl acetate, triethyl citrate, and octylmethoxycinnamate. Natural oils include avocado oil, camellia oil, turtle oil, macadamia nut oil, corn oil, mink oil, olive oil, rapeseed oil, egg yolk oil, sesame oil, persic oil, wheat germ oil, sasanca oil, castor oil, flaxseed oil, Safflower oil, cottonseed oil, eno oil, soybean oil, peanut oil, tea seed oil, kaya oil, rice bran oil, cinnagar oil, Japanese kiri oil, jojoba oil, germ oil, triglycerin, trioctanoic acid glycerin, triisopalmitic acid glycerin Dimethylpolysiloxane, methylphenylpolysiloxane, highly polymerized dimethylpolysiloxane, dimethylsiloxane, polyether-modified silicone such as methyl (polyoxyethylene) siloxane copolymer, decamethylcyclopentasiloxane, octamethylcyclotetrasiloxane, etc. Cyclic silicone, high polymerization Such silicones include various derivatives such as amino-modified silicones such as methyl polysiloxane methyl (Aminopupopiru) siloxane copolymers.

The amount of component (d) in the oil-in-water emulsion composition of the present invention is 1.0 to 30% by mass with respect to the total amount of the oil-in-water emulsion composition. If the amount is less than 1% by mass, the moisturizing effect of the oil cannot be obtained. If the amount is more than 30% by mass, the oily feel and oil floating can be seen. Will be prepared. Since the emulsified composition of the present invention contains a water-swellable silicate, oiliness tends to be reduced as compared with a normal emulsified composition.

It is preferable that (c) component mix | blended with this invention is 5 mass% or less of (d) component. Even if it is added in an amount of more than 5% by mass, not only the surface active effect is improved, but also a sticky feeling of the surfactant can be felt.

The (e) water blended in the present invention is not particularly limited as long as it is usually blended into a skin external preparation or cosmetic. It is preferable that the compounding quantity of (e) component in the oil-in-water emulsion composition of this invention is 50-99 mass% with respect to the emulsion composition whole quantity.

The oil-in-water emulsion composition of the present invention comprises: (a) a water-swellable layered silicate and (b) a cationic polymer; (e) an outer phase thickened with water; It is obtained by adding and emulsifying an oil phase obtained by mixing a surfactant and (d) oil. The viscosity at 25 ° C. is preferably 1000 to 13000 mPa · S.

The oil-in-water emulsion composition of the present invention is preferably used for external preparations for skin, cosmetics, hair cosmetics, cleaning agents, hair cleaning agents, makeup removers, pharmaceuticals, and quasi drugs. As a use form, it can be used with arbitrary forms, such as a milky lotion, a cosmetic liquid, sunscreen, a cleaning material, a cream, a pack, for example.

Furthermore, the oil-in-water emulsion composition according to the present invention can be blended with other components as necessary in addition to the above-described essential components as long as the desired effects of the present invention are not impaired.

Examples of other components that are appropriately blended include waxes such as carnauba wax and candelilla wax, higher alcohols such as capryl alcohol, lauryl alcohol, myristyl alcohol, cetyl alcohol, cholesterol and phytosterol, polyethylene glycol, glycerin, and 1,3-butylene. Moisturizers such as glycol, erythritol, sorbitol, xylitol, maltitol, mucopolysaccharide, hyaluronic acid, chondroitin sulfate, chitosan, etc., lower alcohols such as ethanol, antioxidants such as butylhydroxytoluene, tocopherol, phytin, benzoic acid, salicylic acid, Antibacterial agents such as sorbic acid, paraoxybenzoic acid alkyl ester, hexachlorophene and the like can be mentioned.

In addition, amino acids such as glycine, alanine, valine, leucine, threonine, phenylalanine, tyrosine, aspartic acid, asparagine, glutamine, taurine, arginine, histidine, and their alkali metal salts and hydrochlorides, acyl sarcosine acids (for example, lauroyl sarcosine sodium) Organic acids such as glutathione, citric acid, malic acid, tartaric acid, lactic acid, vitamin A and its derivatives, vitamin B6 hydrochloride, vitamin B6 tripalmitate, vitamin B6 dioctanoate, vitamin B2 and its derivatives, vitamin B12, vitamin B15 and Vitamin B of its derivatives, ascorbic acid, ascorbic acid sulfate (salt), ascorbic acid phosphate (salt), ascorbic acid dipalmitate, etc., and α-toco Errol, β-tocopherol, γ-tocopherol, vitamin E, vitamin D, vitamin H, pantothenic acid, panthetin and other vitamins, nicotinamide, benzyl nicotinate, γ-oryzanol, allantoin, glycyrrhizic acid (salt), Glycyrrhetinic acid and its derivatives, hinokitiol, bisabolol, eucalyptol, thymol, inositol, saikosaponin, carrot saponin, hechisaponin, muclodisaponin, saponins, pantothenyl ethyl ether, ethinyl estradiol, tranexamic acid, arbutin, 4-methoxy Examples include various drugs such as salicylate, ceforatin, and placenta exhaust. However, since the salt promotes the aggregation of the water-swellable silicate, the blending amount is preferably kept to a few percent or less.

Furthermore, organics such as borage, clara, corn, orange, sage, yarrow, mallow, assembly, thyme, suki, spruce, birch, horsetail, loofah, maronier, yukinoshita, arnica, lily, mugwort, peonies, aloe, gardenia, sawara, etc. Examples include natural extracts extracted with solvents, alcohols, polyhydric alcohols, water, aqueous alcohols, pigments, neutralizers, antioxidants, fragrances, purified water, and the like.

Furthermore, water-soluble polymers and oil-soluble polymers can be blended, but a large amount is not desirable because the refreshing feeling that is a feature of the present invention is lost. In addition, in order to improve the usability such as familiarity, a small amount of various hydrophilic properties such as anionic surfactant and high HLB nonionic surfactant can be blended. Moreover, it is also possible to mix | blend various powder and pigments other than a water swellable silicate.

EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated concretely, this invention is not limited to the following Example. All compounding amounts are expressed in mass% with respect to the total amount of the composition.

<The manufacturing method of Examples 1-3 and Comparative Examples 1-6>
Based on the formulation shown in Table 1, after the water-swellable silicate was dispersed in water, a polymer aqueous solution prepared to 1.0% by mass was added and stirred with a homomixer to obtain a gel (aqueous phase). Next, the gel state and usability were evaluated. The results are shown in Table 1.

<Evaluation criteria of gel state>
One day after the preparation of each sample, the state was evaluated. The evaluation criteria are as follows.
○: A smooth gel could be prepared without any particular problem. △: The gel could be prepared, but it was water-separated or slightly non-uniform (mamasco). ×: The gel was not formed (viscosity did not appear). Remarkably water-removed

<Evaluation criteria for various usability>
[Usability (no sliminess)]
The usability (non-smoothness) of each sample was evaluated by an actual use test of one expert panel. The evaluation criteria are as follows.
(Evaluation)
◎: Evaluated that it does not feel wet at all ○: Evaluated that it feels slightly wet, but that there was no problem in use △: Evaluated that it was slightly wet ×: Evaluated that it was extremely wet

[Usability (no stickiness)]
The usability (no stickiness) of each sample was evaluated in an actual use test by one expert panel. The evaluation criteria are as follows.
(Evaluation)
◎: Evaluated as not feeling sticky at all ○: Evaluated as slightly sticky but evaluated as having no problem in use △: Evaluated as slightly sticky ×: Evaluated as extremely sticky

(* 1) Kunipia F (Kunimine Industry Co., Ltd.)
(* 2) Polymer JR-400 (Dow Chemical Co.)
From the results shown in Table 1, it can be seen that a stable and low-viscosity gel with no water separation can be prepared only when the water-swellable silicate and the cationic polymer are mixed in an appropriate ratio.

<The manufacturing method of Examples 4-6 and Comparative Examples 7-15>
Based on the formulations shown in Tables 2 and 3, after the water-swellable silicate was dispersed in water, an aqueous polymer solution prepared to 1.0% by mass was added and stirred with a homomixer to prepare an aqueous phase. An oil-in-water emulsion composition was obtained by adding an oil phase in which a nonionic surfactant and oil were mixed in advance and stirring and emulsifying with a homomixer. Next, emulsion stability over time and usability were evaluated. The results are shown in Tables 2 and 3.

<Evaluation criteria for emulsion stability over time>
Each sample was macroscopically and microscopically observed after storage at 40 ° C. for 3 months. The evaluation criteria are as follows.
(Evaluation criteria)
◎: No change in size and appearance of emulsified particles immediately after preparation ○: Although there is some change in emulsified particles, water or oil is not dissociated Δ: Partial dissociation of water or oil is seen ×: Water and oil are completely dissociated

[Usability (moist feeling)]
The usability (moist feeling) of each sample was evaluated by an actual use test of one expert panel. The evaluation criteria are as follows.
(Evaluation)
◎: Evaluated to be moist ○: Evaluated to be slightly moist △: Evaluated to be not very moist ×: Evaluated to be rather moist

(* 1) Smecton SA-1 (Kunimine Industry Co., Ltd.)
(* 2) Polymer JR-400 (Dow Chemical Co.)

(* 1) Laponite XLG (manufactured by Laporte, UK)
(* 2) SUBMICA E (made by LCW, France)
(* 3) SUBMICA N (France, LCW, non-swelling synthetic mica)
(* 4) Kachinal LC-200 (manufactured by Toho Chemical Industry Co., Ltd.)

Based on the above results, only when water-swellable silicate and cationic polymer are mixed in an appropriate ratio, and the hydrophobic nonionic surfactant and the oil content are properly blended, stable and sticky feeling and sliminess are obtained. It was shown that a low-viscosity emulsion excellent in usability such as no moistness can be prepared. Further, it was shown that when a silicone oil or the like is blended, a nonionic silicone surfactant may be used.

As described above, only when water-swellable silicate and cationic polymer are mixed at an appropriate ratio, and a hydrophobic nonionic surfactant and an oil content are properly blended, stable and sticky feeling and sliminess are obtained. It was shown that a low-viscosity oil-in-water emulsified composition excellent in usability such as being moist and not moist could be prepared.

Examples of the oil-in-water emulsion composition of the present invention are shown below. All compounding quantities are the mass% with respect to the composition whole quantity. After the water-swellable silicate is dispersed in water, an aqueous polymer solution prepared to 1.0% by mass is added and stirred with a homomixer to prepare an aqueous phase. To this, a nonionic surfactant and an oil are added in advance. Each oil-in-water emulsified composition is obtained by adding an oil phase mixed with and stirring and emulsifying with a homomixer.

Example 7: Oil-in-water moisturizing milk purified water to100
Glycerin 5.0
Water-swellable silicate (Kunipia F: Kunimine Kogyo Co., Ltd.) 3.0
Cationic polymer (Polymer JR-400: manufactured by Dow Chemical Co.) 0.05
Liquid paraffin 10.0
Vaseline 3.0
Jojoba oil 2.0
Diglycerin diisostearate 0.4
Sodium N-stearoyl glutamate 0.1
Trisodium phosphate 0.01
Preservative appropriate amount

Example 8: Oil-in-water moisturizing milk purified water for daytime to100
1,3-butylene glycol 8.0
Cationic polymer (Kachinar HC-200: manufactured by Toho Chemical Co., Ltd.) 0.05
Xanthan gum 0.05
Water-swellable silicate (Laponite XLG: synthetic hectorite-like substance manufactured by LaPorte) 2.0
Ethyl 2-ethylhexanoate 8.0
Octyl methoxycinnamate 5.0
Dimethicone 5.0
Bisethylhexyloxyphenol methoxyphenyltriazine 1.0
POE (8) Gluceryl monoisostearate 0.5
Titanium oxide 2.0
Metal sequestering agent
Preservative appropriate amount
100.0

Example 9: Oil-in-water whitening milk purified water to100
Dipropylene glycol 5.0
Water-swellable silicate (Smecton SA-1: Kunimine Industry Co., Ltd. saponite-like substance) 1.5
Cationic polymer (Mercoat 550: manufactured by Nalco) 0.1
Arbutin 2.0
Vaseline 3.0
Squalane 5.0
Glyceryl tri-2-ethylhexanoate 3.0
Stearyl alcohol 0.5
Sucrose monostearate 0.05
Metal sequestering agent

Example 10: Oil-in-water makeup cleansing milk purified water 65.0
Polyethylene glycol 400 5.0
Dipropylene glycol 3.0
POE14 / POP7 random copolymer 3.0
Cationic polymer (Catinal LC-200: manufactured by Toho Chemical Co., Ltd.) 0.1
Water-swellable silicate (Bee gum: Vanderbilt) 2.5
Pentaerythrityl tetraethylhexanoate 5.0
Ethyl ethylhexanoate 3.0
Decamethylcyclopentasiloxane 8.0
POE / POB block copolymer 1.0
Polyethylene powder 1.0
pH buffering agent

Claims (1)

(A) 0.5-5.0% by mass of the water-swellable layered silicate, (b) 0.01-0.5% by mass of the cationic polymer, and (c) based on the total amount of the composition It contains 0.05 to 0.7% by mass of a nonionic surfactant having an HLB of 8 or less, (d) 1.0 to 30% by mass of oil, and (e) water, and the following (1) to (3 ) Oil-in-water emulsion composition that satisfies the following conditions:
(1) (c) The blending amount of the nonionic surfactant of HLB 8 or less is 5% by mass or less of the blending amount of (d) oil.
(2) At 25 ° C., the viscosity is 1000 to 13000 mPa · S.
(3) The blending weight ratio of (a) water-swellable layered silicate and (b) cationic polymer is 100: 1 to 10: 1.