JP2006188618A - Oil-in-water type polyorganosiloxane emulsion - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an O/W type polyorganosiloxane emulsion which has excellent fluidity at low temperature and doses not give large loads to environments. <P>SOLUTION: This O/W type polyorganosiloxane emulsion comprises (A) 100 pts.wt. of a polyorganosiloxane having a viscosity of 0.1 to 10,000 Pa s at 25°C, (B) 1 to 50 pts.wt. of a polyoxyalkylene alkyl ether represented by the general formula: R-O-(EO)<SB>m</SB>-(PO)<SB>n</SB>H or R-O-(PO)<SB>n</SB>-(EO)<SB>m</SB>H [R is a 16 to 24C alkyl; EO is an ethylene oxide unit; PO is a propylene oxide unit; (m) is the average addition molar number of the ethylene oxide units and is an integer of 1 to 100; (n) is the average addition molar number of the propylene oxide units and is an integer of 1 to 100; (m)/(n)>2], and (C) water. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an oil-in-water polyorganosiloxane emulsion, and more particularly to an oil-in-water polyorganosiloxane emulsion having excellent low-temperature fluidity and a low environmental load.

  In general, silicone (polyorganosiloxane) is excellent in lubricity, releasability, water repellency, etc., so it can be used as a soft finish for natural and synthetic fibers such as cotton and wool, and when plastic products are molded. As a mold release agent, it is widely used as a raw material for hair cosmetics and skin cosmetics. And in these applications, silicone is widely used in the form of an emulsion because it can be treated in an aqueous system, has good blending stability with other organic components, and is excellent in safety. .

  Examples of the emulsifier used in the silicone emulsion include surfactants composed of nonionic surfactants, anionic surfactants, cationic surfactants, amphoteric surfactants, and mixtures thereof. Conventionally, silicone emulsions used in cosmetics have the above-mentioned surface active properties in order to stably disperse polyorganosiloxane in other cosmetic ingredients such as water, alcohols, mineral oils, waxes, fatty acid esters and the like. Among these agents, ether type nonionic surfactants are preferably used.

  However, in recent years, there has been a demand for selection of a surfactant that has a low environmental impact. For example, alkyl polyethers having an alkyl group having 12 to 15 carbon atoms are designated chemical substances that require the release of PRTR (Pollutant Release and Transfer Register) as chemical substances that are likely to be affected by the environment. And its use is restricted. In addition, tallow-derived surfactants such as beef tallow are from the Director of the Pharmaceutical Safety Bureau of the Ministry of Health and Welfare, “Ensuring the quality and safety of pharmaceuticals manufactured using bovine and other derived materials as raw materials (December 12, 2000) The use of cosmetics and the like is being restricted.

  As surfactants adapted to such restrictions, plant-derived polyoxyethylene n-cetyl ether and polyoxyethylene n-stearyl ether are known, but these surfactants have a high melting point, Or, since it has a property of agglomerating when blended with water, there has been a problem of causing emulsification defects such as creaming of the emulsion, oil separation, and water separation. Furthermore, even when an emulsion is obtained, there is a problem that fluidity at low temperatures is poor.

  In order to solve such problems, a long chain (alkyl chain length of 16) polyoxyethylene adduct and a short chain (alkyl chain length of 10) polyoxyethylene adduct were used in combination as emulsifiers. Silicone emulsions (for example, see Patent Document 2) and silicone emulsions using a polyoxyethylene adduct of a long-chain branched alcohol such as isocetyl alcohol have been proposed.

However, each of the silicone emulsions described in Patent Document 1 and Patent Document 2 has a problem that fluidity at low temperatures is not sufficient and handling properties (handling properties) are inferior.
JP 2002-188055 A JP 2003-073546 A

  The present invention has been made to solve these problems, and an object of the present invention is to provide an oil-in-water polyorganosiloxane emulsion that is excellent in fluidity at low temperatures and has a small load on the environment.

The oil-in-water polyorganosiloxane emulsion of the present invention has (A) 100 parts by weight of a polyorganosiloxane having a viscosity of 0.1 to 10,000 Pa · s at 25 ° C. -(EO) _m- (PO) _n H or R-O- (PO) _n- (EO) _m H (wherein R is an alkyl group having 16 to 24 carbon atoms, EO is ethylene oxide) Unit, PO represents a propylene oxide unit, m represents an average number of added moles of an ethylene oxide unit, n represents an average number of added moles of a propylene oxide unit, both are integers of 1 to 100, and m / n> 2) and 1 to 50 parts by weight of a polyoxyalkylene alkyl ether represented by (C) and water.

  The oil-in-water polyorganosiloxane emulsion of the present invention is excellent in fluidity at low temperatures and has little adverse effect on the environment and human body. Moreover, the dispersibility when it mix | blends with another component is favorable, and can fully exhibit the addition effect of the polyorganosiloxane to a to-be-blended component.

  Hereinafter, embodiments of the oil-in-water polyorganosiloxane emulsion according to the present invention will be described.

An oil-in-water polyorganosiloxane emulsion according to an embodiment of the present invention includes (A) 100 parts by weight of a polyorganosiloxane having a viscosity of 0.1 to 10,000 Pa · s at 25 ° C., and (B) a general formula: R—O. -(EO) _m- (PO) _n H or R-O- (PO) _n- (EO) _m H (wherein R is an alkyl group having 16 to 24 carbon atoms, EO is ethylene oxide) Unit, PO represents a propylene oxide unit, m represents an average number of added moles of an ethylene oxide unit, n represents an average number of added moles of a propylene oxide unit, both are integers of 1 to 100, and m / n> 2) and 1 to 50 parts by weight of a polyoxyalkylene alkyl ether represented by (C) and water.

In the embodiment of the present invention, the polyorganosiloxane having a viscosity (25 ° C.) of 0.1 to 10,000 Pa · s as the component (A) is a main component of the emulsion, for example, an average composition formula: R ¹ _a SiO _{( 4-a) / 2} .

In the formula, R ¹ is a substituted or unsubstituted monovalent hydrocarbon group that is the same or different from each other, and specifically includes a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, and a heptyl group. Aliphatic saturated hydrocarbon groups such as octyl group, decyl group, dodecyl group; aliphatic unsaturated hydrocarbon groups such as vinyl group, allyl group, hexenyl group; alicyclic hydrocarbon groups such as cyclopentyl group, cyclohexyl group; Aromatic hydrocarbon groups such as phenyl group, tolyl group, and naphthyl group; hydrogen atoms bonded to carbon atoms of these groups are partially halogen atoms or organic groups such as epoxy groups, carboxyl groups, methacryl groups, polyoxyalkylene groups Examples include a group substituted with a group. Of these, unsubstituted monovalent hydrocarbon groups are preferred. Further, a part of R ¹ may be substituted with a hydrogen atom, a hydroxyl group or an alkoxy group. a is a number exceeding 0 and less than 3, preferably 1.0 to 2.5, and more preferably 1.8 to 2.2. The molecular structure may be linear, linear with some branching, branched, or cyclic.

  As the component (A), a linear diorganopolysiloxane whose molecular chain end is blocked with a trimethylsiloxy group, silanol group, alkoxy group, Si—H group (silyl group) or the like is preferable. Examples of the diorganopolysiloxane include dimethylpolysiloxane, methylphenylsiloxane / dimethylsiloxane copolymer, methylvinylsiloxane / dimethylsiloxane copolymer, and methylethylsiloxane / dimethylsiloxane copolymer. Among these polyorganosiloxanes, those having a dimethylsiloxane unit of 70 mol% or more are preferable.

  As the component (A), one kind of polyorganosiloxane may be used alone, or two or more kinds may be mixed and used. The viscosity at 25 ° C. is 0.1 to 10,000 Pa · s, preferably 0.5 to 2,000 Pa · s, and more preferably 1.0 to 1,000 Pa · s.

  In addition, since the viscosity here is a viscosity as the whole component (A), even if it is a polyorganosiloxane having a viscosity outside the above range, by adjusting the viscosity by mixing with a polyorganosiloxane having a different viscosity, It can be used as component (A). For example, a high viscosity polyorganosiloxane of 5,000 to 20,000 Pa · s, a polyorganosiloxane having a viscosity of 1.0 Pa · s or less as a diluent, hexamethyldisiloxane, octamethylcyclotetrasiloxane, decamethylcyclopenta Mixtures containing volatile low molecular weight polyorganosiloxanes such as siloxane can also be used. In such a mixture, the amount of the diluent is preferably 10 to 1000 parts by weight with respect to 100 parts by weight of the high viscosity polyorganosiloxane.

In the embodiment, the polyoxyalkylene represented by the general formula: R—O— (EO) _m — (PO) _n H, or R—O— (PO) _n — (EO) _m H, which is the component (B) Alkyl ether is a characteristic component of the oil-in-water emulsion of the present invention. This (B) polyoxyalkylene alkyl ether is an emulsifier of the component (A). By blending the component (B), the fluidity and stability of the emulsion at a low temperature can be improved, and the environment and human body can be improved. It has the advantage that the load is small. Furthermore, it functions to improve dispersibility and stability when the emulsion of the present invention is blended with other components. As the component (B), it is desirable to use a polyoxyalkylene alkyl ether represented by the general formula: R—O— (EO) _m — (PO) _n H, from the viewpoint of ease of production.

  (B) In the general formula showing polyoxyalkylene alkyl ether, R is an alkyl group having 16 to 24 carbon atoms, specifically, cetyl group, isocetyl group, stearyl group, isostearyl group, behenyl group, decyltetra A decyl group etc. are mentioned. From the viewpoint of availability, a cetyl group or a stearyl group is desirable. Moreover, m and n showing the average added mole number of an ethylene oxide unit (EO) and a propylene oxide unit (PO) are all 1-100, More preferably, it is an integer of 4-60. Further, m / n> 2.

  When the number of R carbon atoms and the number of added moles of ethylene oxide and propylene oxide are out of the above ranges, the stability of the emulsion is lowered. (B) A component may be used individually by 1 type, or 2 or more types of mixtures may be sufficient as it.

  (B) As for the compounding quantity of a component, 1-50 weight part is preferable with respect to 100 weight part of (A) component, and 2-30 weight part is further more preferable. If the blending amount of the component (B) is less than 1 part by weight, it is difficult to emulsify the component (A). It becomes difficult.

  In the embodiment of the present invention, the water as the component (C) is a dispersion medium for the component (A). For example, normal water, pure water, or ion exchange water can be used. (C) Although the compounding quantity of water is not specifically limited, Preferably it is 5-2000 weight part with respect to 100 weight part of (A) component, More preferably, it is 10-1000 weight part. (C) If the blending amount of water is less than 5 parts by weight, the stability of the emulsion itself and the dispersibility in other components will decrease, and conversely if it exceeds 2000 parts by weight, it will be stored for a long time. Stability may deteriorate.

  The emulsion of the embodiment of the present invention is essentially composed of the components (A) to (C), but can contain a hydrocarbon solvent as a diluent for the component (A). The blending amount of the hydrocarbon solvent is preferably in the range of 10 to 1000 parts by weight with respect to 100 parts by weight of component (A). Furthermore, in order to further improve the blending stability to other components, other components known as additives for polyorganosiloxane emulsions should be added and blended as long as the object of the present invention is not impaired. Can do.

  Examples of such additives include anionic surfactants, cationic surfactants, amphoteric surfactants, nonionic surfactants other than the component (B), alcohols, water-soluble polymers, antiseptics, and antifungal agents. Examples thereof include agents and rust preventives. The surfactant is preferably a non-silicone surfactant. These components may be used alone or in combination. The blending procedure is not particularly limited.

  Specific examples of the anionic surfactant include N-acyl-sarcosine salts, N-acylglutamic acid and salts thereof, alkanesulfonic acid and salts thereof, α-olefinsulfonic acid and salts thereof, alkylsulfuric acid and salts thereof, and dialkylsulfosuccines. Acids and salts thereof, acylmethyl taurine and salts thereof, polyoxyethylene alkyl ether sulfuric acid and salts thereof, fatty acid salts, alkyl polyether carboxylic acids and salts thereof, alkyl phosphoric acid and salts thereof, polyoxyethylene alkyl ether phosphoric acid and salts thereof Examples thereof include salts, alkylallylsulfonic acid and salts thereof, and acylated hydrolyzed collagen peptide salts.

  Specific examples of the cationic surfactant include ethyl lanolin sulfate fatty acid aminopropylethyldimethylammonium chloride, alkyltrimethylammonium chloride, alkyldihydroxyethylmethylammonium chloride, -γ-gluconamidopropyldimethylhydroxyethylammonium chloride, dialkyldimethylammonium chloride, Di (polyoxyethylene) alkylmethylammonium chloride, stearoylcholaminoformylmethylpyridinium chloride, cetylpyridinium chloride, alkyldimethylethylammonium chloride, tri (polyoxyethylene) alkylammonium chloride, benzalkonium chloride, benzethonium chloride, polyoxychloride Ethylene polyoxypropylene diethylmethylammonium chloride polyoxypropylene methyldie Le ammonium lauroyl Kola amino formyl methyl pyridinium chloride, alkyl bromide isoquinolinium solution, bromide alkyltrimethylammonium, like alkyl trimethylammonium saccharin.

  Specific examples of the nonionic surfactant other than the component (B) are ethylene glycol fatty acid esters, polyethylene glycol fatty acid esters, propylene glycol fatty acid esters, polypropylene glycol fatty acid esters, glycol fatty acid esters, trimethylol. Propane fatty acid esters, pentaerythritol fatty acid esters, glucoside derivatives, glycerin alkyl ether fatty acid esters, trimethylolpropaneoxyethylene alkyl ethers, fatty acid amides, alkylolamides, alkylamine oxides, lanolin and derivatives thereof , Castor oil derivatives, hydrogenated castor oil derivatives, sterols and derivatives thereof, polyoxyethylene alkyl ethers, polyoxyethylene alkyl Allyl ethers, polyoxyethylene alkylamines, polyoxyethylene fatty acid amides, polyoxyethylene alkylolamides, polyoxyethylene diethanolamine fatty acid esters, polyoxyethylene trimethylolpropane fatty acid esters, polyoxyethylene alkyl ether fatty acids Esters, polyoxyethylene polyoxypropylene glycols, polyoxyethylene polyoxypropylene alkyl ethers, polyoxyethylene polyoxypropylene polyhydric alcohol ethers, glycerin fatty acid esters, polyglycerin fatty acid esters, polyoxyethylene glycerin fatty acid Esters, sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, sucrose fatty acid ester Kind and the like.

  Specific examples of amphoteric surfactants include 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, sodium alkylhydroxyethylimidazolinium betaine, alkyldiaminoethylethylglycine hydrochloride, stearyldimethylaminoacetic acid betaine Bis (stearyl-N-hydroxyethylimidazoline) chloroacetic acid complex, alkyl-N-carboxymethoxyethyl-N-carboxymethylimidazolinium disodium hydroxide, coconut oil alkyl-N-carboxymethoxyethyl-N-carboxymethylimidazole Linium disodium lauryl sulfate, alkylbetaine, laurylaminopropionate triethanolamine, β-laurylaminopropionate sodium, lauryl-N-carboxyl Tokishiechiru -N- carboxymethyl imidazolinium disodium dodecanoyl sarcosine, lauryl di aminoethyl glycine sodium, lauryl betaine, and the like lauric acid amide propyl betaine solution.

  Specific examples of antiseptics, fungicides, and rust inhibitors include benzoic acid, aluminum benzoate, sodium benzoate, isopropylmethylphenol, ethylhexanediol, lysozyme chloride, chlorhexidine hydrochloride, octylphenoxyethanol, orthophenylphenol, Sodium acid, Photosensitive element 101, Photosensitive element 201, Photosensitive element 301, Photosensitive element 401, Chlorhexidine gluconate, Cresol, Chloramine T, Chloroxylenol, Chlorcresol, Chlorphenesine, Chlorhexidine, Chlorobutanol, Resorcin acetate , Salicylic acid, sodium salicylate, domifene bromide, zinc pyrithione, zinc pyrithione solution, sorbic acid, potassium saorbate, thianthol, thioxolone, thymol, thyram, dehydro Acid, sodium dehydroacetate, trichlorocarbanilide, trichlorohydroxydiphenyl ether, isobutyl paraoxybenzoate, isopropyl paraoxybenzoate, ethyl paraoxybenzoate, butyl paraoxybenzoate, propyl paraoxybenzoate, benzyl paraoxybenzoate, methyl paraoxybenzoate, Sodium methyl paraoxybenzoate, parachlorophenol, sodium paraphenolsulfonate (dihydrate), halocarban, phenoxyethanol, phenol, hexachlorophane, mononitroguaiacol, mononitroguaiacol sodium, paradimethylaminostyrylheptylmethyllia iodide Zolinium, lauryltrimethylammonium trichlorophenoxide, oxyquinoline sulfate, phosphoric acid Kishikinorin, such as resorcinol, and the like.

  Specific examples of the water-soluble polymer include carboxyvinyl polymer, sodium carboxymethyl cellulose, gum arabic, alginate, propylene glycol alginate, ethyl cellulose, karaya gum, carboxymethyl chitin solution, carboxymethyl dextran, carboxymethyl dextran sodium, agar, xanthan gum, Spherical cellulose, guar gum, crystalline cellulose, starch, sodium chondroitin sulfate, β-cyclodextrin, dextrin stearate, sodium sodium glycolate, dextran sulfate, dextrin, natural rubber latex, starch glycolate, nitrocellulose, dextrin palmitate , Viscose rayon, hydroxyethylcellulose, hydroxye Le cellulose dimethyldiallylammonium chloride, hydroxyethyl cellulose hydroxypropyl trimethyl ammonium chloride ethers, hydroxypropyl cellulose, pectin, methylcellulose, coconut oil fatty acid dextrin, lauric acid dextrin, and rosin, and the like.

  The method for preparing the emulsion of the embodiment of the present invention is not particularly limited, but generally, a method of emulsifying by applying high shear after uniformly mixing the component (A), the component (B) and the component (C) is adopted. It is done. The average particle size of the emulsion of the embodiment is preferably 0.5 to 100 μm, more preferably 0.5 to 50 μm.

  The oil-in-water polyorganosiloxane emulsion according to the embodiment of the present invention thus configured is excellent in fluidity at low temperatures and has a feature that there are few adverse effects on the environment and on the human body. Moreover, the dispersibility when blended with other components is good, and the effects of addition and blending can be sufficiently exhibited. Therefore, it is suitable as a raw material for cosmetics, and is also useful as a mold release agent and a fiber treatment agent.

EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated concretely, this invention is not limited to these Examples. In the examples, “part” represents “part by weight”, “%” represents “% by weight”, and the viscosity is a value at 25 ° C. The characteristics of the emulsion were measured and evaluated according to the following methods.

[Average particle size of emulsion]
The particle size of the emulsion was measured using a particle size distribution measuring apparatus (manufactured by COULTER; LS100Q) and setting the refractive index to 1.45.

[Low temperature fluidity of emulsion]
The emulsion was put in a 100 cc glass bottle, sealed, and allowed to stand in a thermostatic bath at -1 ° C and 25 ° C for 1 day. Thereafter, the viscosity was measured using a rotational viscometer under the respective temperature conditions, and calculated and compared by the following formula. The closer this value is to 1, the better the low temperature fluidity.
Low temperature fluidity = (viscosity at −1 ° C.) ÷ (temperature at 25 ° C.)

[High temperature stability of emulsion]
The emulsion was put in a 100 cc glass bottle, sealed, and allowed to stand in a constant temperature bath at 50 ° C. for 1 month. The appearance of the emulsion after one month was visually observed and evaluated according to the following criteria.
A: Uniform without any change immediately after preparation, and high-temperature stability was very good.
(Triangle | delta): Some creaming was recognized by the upper part.
X: It separated into two layers.

Example 1
Polyoxyethylene polyoxy having 600 parts of tridimethylsiloxy group-blocked polydimethylsiloxane having a viscosity of 100 Pa · s, 10 added moles of ethylene oxide (EO) and 8 added moles of propylene oxide (PO) After uniformly mixing 34 parts of propylene cetyl ether and 66 parts of polyoxyethylene polyoxypropylene cetyl ether having an addition mole number of EO of 20 and an addition mole number of PO of 8 at 80 ° C., 80 parts of water was added. The mixture was stirred for 3 hours to invert the phase to form a transparent grease.

  Subsequently, 212 parts of water, 3 parts of citric acid and 5 parts of sodium benzoate were added and stirred for 1 hour, and a uniform oil-in-water type emulsion composition (hereinafter referred to as O / W type) having a silicone content of 60% (hereinafter referred to as O / W type). E-1) was obtained. Table 1 shows the average particle size, low temperature fluidity and high temperature stability of the obtained emulsion composition (E-1).

Example 2
600 parts of polydimethylsiloxane blocked with trimethylsiloxy groups at both ends of the molecular chain having a viscosity of 100 Pa · s, 40 parts of polyoxyethylene polyoxypropylene cetyl ether having 10 added moles of EO and 4 added moles of PO, and EO After 60 parts of polyoxyethylene polyoxypropylene cetyl ether having an addition mole number of 20 and PO addition mole number of 4 is uniformly mixed at 70 ° C., 80 parts of water is added and stirred for 3 hours to cause phase inversion. A transparent grease was used.

  Next, 212 parts of water, 3 parts of citric acid and 5 parts of sodium benzoate were added and stirred for 1 hour to obtain a uniform O / W emulsion composition (E-2) having a silicone content of 60%. Table 1 shows the average particle size, low temperature fluidity and high temperature stability of the obtained emulsion composition (E-2).

Example 3
600 parts of polydimethylsiloxane blocked with hydroxyl groups at both ends of the molecular chain having a viscosity of 80 Pa · s, 34 parts of polyoxyethylene polyoxypropylene cetyl ether having an addition mole number of EO of 8 and PO addition mole of 8, and EO After 66 parts of polyoxyethylene polyoxypropylene cetyl ether having an addition mole number of 20 and PO addition mole number of 8 is uniformly mixed at 70 ° C., 80 parts of water is added and stirred for 3 hours to effect phase inversion. Transparent grease.

  Subsequently, 212 parts of water, 3 parts of citric acid and 5 parts of sodium benzoate were added and stirred for 1 hour to obtain a uniform O / W emulsion composition (E-3) having a silicone content of 60%. Table 1 shows the average particle size, low temperature fluidity and high temperature stability of the obtained emulsion composition (E-3).

Comparative Example 1
600 parts of trimethylsiloxy group-blocked polydimethylsiloxane having a viscosity of 100 Pa · s, 34 parts of polyoxyethylene cetyl ether having an EO addition mole number of 5, and polyoxyethylene having an EO addition mole number of 25 After 66 parts of cetyl ether were uniformly mixed at 70 ° C., 70 parts of water was added and stirred for 3 hours to invert the phase to obtain a transparent grease.

  Next, 222 parts of water, 3 parts of citric acid and 5 parts of sodium benzoate were added and stirred for 1 hour to obtain a uniform O / W emulsion composition (E-4) having a silicone content of 60%. Table 1 shows the average particle size, low temperature fluidity and high temperature stability of the obtained emulsion composition (E-4).

Comparative Example 2
600 parts of polydimethylsiloxane blocked with trimethylsiloxy groups at both ends of a molecular chain having a viscosity of 100 Pa · s, 34 parts of polyoxyethylene isocetyl (hexyldecyl) ether having an addition mole number of EO of 25, and 25 moles of addition of EO After mixing 66 parts of polyoxyethylene isocetyl (hexyldecyl) ether uniformly at 70 ° C., 70 parts of water was added and stirred for 3 hours to invert the phase to obtain a transparent grease.

  Next, 222 parts of water, 3 parts of citric acid and 5 parts of sodium benzoate were added and stirred for 1 hour to obtain a uniform O / W emulsion composition (E-5) having a silicone content of 60%. Table 1 shows the average particle diameter, low-temperature fluidity, and high-temperature stability of the obtained emulsion composition (E-5).

  As is apparent from Table 1, the O / W type polyorganosiloxane emulsions obtained in Examples 1 to 3 are excellent in low-temperature fluidity and very high-temperature stability.

  The oil-in-water polyorganosiloxane emulsion of the present invention is characterized by excellent fluidity at low temperatures and less environmental load and human problems. In addition, the dispersibility when blended with other components is good, and since the blending effect can be sufficiently exerted, it is suitably used as a cosmetic raw material, and is also useful as a mold release agent and fiber treatment agent. is there.

Claims (5)

(A) For 100 parts by weight of polyorganosiloxane having a viscosity at 25 ° C. of 0.1 to 10,000 Pa · s,
(B) General formula: R—O— (EO) _m — (PO) _n H,
Or R—O— (PO) _n — (EO) _m H (wherein R represents an alkyl group having 16 to 24 carbon atoms, EO represents an ethylene oxide unit, and PO represents a propylene oxide unit. Represents the average number of moles added of ethylene oxide units, and n represents the average number of moles added of propylene oxide units, both of which are integers of 1 to 100, and m / n> 2. An oil-in-water polyorganosiloxane emulsion comprising 1 to 50 parts by weight of ether and (C) water. 2. The oil-in-water polyorganosiloxane according to claim 1, wherein the component (B) is a polyoxyalkylene alkyl ether represented by the general formula: R—O— (EO) _m — (PO) _n H Emulsion.   3. The oil-in-water polyorganosiloxane emulsion according to claim 1, wherein R is a cetyl group having 16 carbon atoms in the general formula representing the polyoxyalkylene alkyl ether (B).   4. The oil-in-water type according to claim 1, wherein in the general formula representing the (B) polyoxyalkylene alkyl ether, n, which is the added mole number of propylene oxide units, is 4 or more. Polyorganosiloxane emulsion.   The oil-in-water polyorganosiloxane emulsion according to any one of claims 1 to 4, wherein the emulsion has an average particle size of 0.5 to 50 µm.