JP6758161B2 - Silicone emulsion composition - Google Patents

Description

The present invention is a protective coating agent and cosmetics that do not contain organic solvents or organic surfactants and impart water repellency, heat resistance, weather resistance, scratch resistance, stain resistance, UV protection, impact resistance, etc. of various base materials. relates silicone emulsion which is suitably used as a plastic additives. In particular, it relates to an emulsion of a silicone resin.

Silicone resin, which has a three-dimensional siloxane skeleton, is coated with electrical insulation for the purpose of protecting heat-resistant paints, weather-resistant paints, resin modification raw materials, and various electronic parts in a wide temperature range by combining with various fillers and organic resins. It is being used as an agent and a binder for heat resistance and electrical insulation. In addition, it is widely used in the field of cosmetic raw materials for the purpose of protecting from external stimuli such as ultraviolet rays and drying, and imparting water resistance.

Generally, silicone resin is a raw material in the form of powder or flakes, is dissolved in an organic solvent, and is blended in paints, etc. In recent years, from the viewpoint of ensuring a safe working environment and environmental load, the dispersion medium is an organic solvent system. There is a need to change from water-based to water-based, and the demand for water-based emulsion compositions is increasing.
Further, in the field of cosmetics, organic solvents are irritating to the skin, and there are restrictions on the organic solvents that can be used. Even non-irritating organic solvents such as mineral oil that can be used in cosmetics may reduce skin function and cell growth when they come into contact with the skin. Similarly, in the field of cosmetics, organic solvents are used. There is a need for an emulsion composition that does not contain.
Further, even when the resin is developed for various purposes as it is on the powder, it is required that the resin does not contain an organic solvent or an organic substance and that the shape and particle size distribution of the particles are good.

On the other hand, in Patent Document 1, for example, silicone excluding the organic solvent is obtained by substituting the solvent component of the organic solvent solution of the silicone resin synthesized in the organic solvent with a nonionic organic surfactant. Resin emulsions are disclosed.
However, the use of organic surfactants generally limits the long-term storage stability of emulsions and the compounding conditions of final products, and in industrial applications such as protective coating agents, the deterioration of physical properties due to organic emulsifiers and the use of organic surfactants on the skin. In cosmetic applications where it is applied directly, there is a problem that it may cause skin irritation.

Japanese Unexamined Patent Publication No. 2014-31413

The present invention has been made in view of the above circumstances, and provides a silicone resin emulsion composition having good long-term storage stability and which does not cause harmful effects due to organic surfactants when applied to protective coatings, cosmetics, etc. The purpose is to do.

Therefore, none of the prior arts has disclosed a specific method for obtaining a silicone resin emulsion that solves the above problems.

As a result of diligent studies to achieve the above object, the present inventors have found that a silicone resin emulsion in which the surface of the emulsion particles is covered with silica particles has advantageous properties in terms of application development, and is suitable for applications. We found that the restrictions were released.

The present invention has been made based on these findings.
That is, the emulsion composition of the present invention has an (A) average composition of 20 to 80 parts by mass of an organopolysiloxane represented by the general formula (1), R ¹ aSiO _{(4-a) / 2} (1) [formula (1). In 1), R ¹ may be the same or different in the molecule, and is a saturated or unsaturated monovalent hydrocarbon group having 1 to 25 substituted or unsubstituted carbon atoms, or a substituted or unsubstituted carbon number. It is an aromatic group of 6 to 30, a hydroxyl group, an alkoxy group having 1 to 6 carbon atoms, or a hydrogen atom, and a is 0.3 or more and less than 2.0. ], (B) A composition containing 0.3 to 10 parts by mass of silica particles having a hydrophobic portion on the surface and a silanol group, and (C) water, and the silica in the composition. The emulsion composition is characterized in that the particles (B) are arranged at the interface between the oil phase of the oil droplet composed of the organopolysiloxane (A) and the aqueous phase composed of the water (C). It is characterized by.

It is preferable that the organopolysiloxane (A) is fluidized after being homogenized as a whole.

The silica particles (B) preferably have a residual ratio of silanol groups in the range of 50 to 95 mol% after silanolizing the silanol groups on the surface.

The emulsion composition of the present invention is an emulsion composition containing a silicone resin as a basic component. Regardless of commonly used organic nonionic surfactants, anionic surfactants, cationic surfactants, and amphoteric surfactants, silica particles are placed at the interface between the oil phase and the aqueous phase, which are organopolysiloxanes. It is characterized by being.
Since the silica particles of the component (B) have an appropriate affinity for both the oil phase and the aqueous phase, they can be arranged at the oil phase / aqueous phase interface to give an oil-in-water emulsion having the aqueous phase as a continuous phase. ..
Therefore, it can be stably used through a series of processes such as during the preparation and storage of an emulsion, during the preparation and storage when blended with a protective coating agent, cosmetics, and the like, and further during treatment for the final use.

In order to obtain such a preferable emulsion state, when the emulsion composition of the present invention is blended with a protective coating agent or a cosmetic and treated for the final use, various adverse effects due to the organic surfactant, for example, a film. It does not cause problems such as instability, reduced heat resistance, reduced hardness, and skin irritation.
Moreover, since it is used as a water system, it is advantageous in terms of safety and environment.
Furthermore, when isolating a resin from an emulsion, it can be isolated more safely than a system dispersed in an organic solvent, and it is also suitable for the resin powder in which the variation in particle size and shape in the emulsion state are isolated. Since it can have an effect, it can be expected to have effects such as improvement in impact resistance and heat resistance even in applications such as blending these into plastic as a powder.

The details of the silicone resin emulsion composition of the present invention will be described below.

(Component (A))
The organopolysiloxane of the component (A) of the present invention is an organopolysiloxane whose average composition formula is represented by the general formula (1).
R ¹ _a SiO _{(4-a) / 2} (1)
[In formula (1), R ¹ may be the same or different in the molecule, and is a substituted or unsaturated saturated or unsaturated monovalent hydrocarbon group having 1 to 25 carbon atoms, substituted or unsubstituted. aromatic group having 6 to 30 carbon atoms, a hydroxyl group, an alkoxy group or a hydrogen atom of 1 to 6 carbon atoms, a is less than 0.3 and not more than 2.0. ]
R ¹ bonded to the silicon atom in the component (A) is preferably a substituted or unsubstituted monovalent hydrocarbon group having 1 to 13 carbon atoms.
a is a numerical value related to the order of the siloxane bond, and if a is 2.0, the component (A) represents a linear siloxane. In the present invention, since a is less than 2.0, the component (A) is a resin. If a is 2.0 or more, the component (A) becomes an oil, so that the problem of the present invention, that is, good coating properties and cosmetic properties cannot be achieved. Further, when a is less than 0.3, although it is in a resin state, it is close to glass due to its high dimension, and emulsification becomes difficult, which is not suitable.

Specific examples of the above organic groups include methyl group, ethyl group, propyl group, isopropyl group, butyl group, isobutyl group, t-butyl group, pentyl group, neopentyl group, hexyl group, 2-ethylhexyl group and heptyl group. Alkyl groups such as octyl group, nonyl group, decyl group and dodecyl group; cycloalkyl groups such as cyclopentyl group, cyclohexyl group and cycloheptyl group; aryl groups such as phenyl group, trill group, xsilyl group, biphenyl group and naphthyl group; Aralkyl groups such as benzyl group, phenylethyl group, phenylpropyl group and methylbenzyl group; -CH _2- CH _2- CH _2- N ₂ , -CH _2- CH _2- CH _2- NH (CH ₃ ), -CH _{2 -CH 2 -CH 2 -N (CH} 3) 2, -CH 2 -CH 2 -NH-CH 2 -CH 2 -NH 2, -CH 2 -CH 2 -CH 2 -NH (CH 3), - _{CH 2 -CH 2 -CH 2 -NH-} CH 2 -CH 2 -NH 2, -CH 2 -CH 2 -CH 2 -NH-CH 2 -CH 2 -N (CH 3) 2, -CH 2 -CH _{2 -CH 2 -NH-CH 2 -CH} 2 -NH (CH 2 CH 3), - CH 2 -CH 2 -CH 2 -NH-CH 2 -CH 2 -N (CH 2 CH 3) 2, -CH _{2 -CH 2 -CH 2 -NH-CH} 2 -CH2-NH nitrogen-containing hydrocarbon group represented by _{(cyclo-C 6 H 11)} ; part or all of the halogen atom of the hydrogen atoms in the hydrocarbon radical, Chloromethyl group, 2-bromoethyl group, 3,3,3-trifluoropropyl group, 3-chloropropyl group, chlorophenyl group, dibromophenyl group, tetrachlorophenyl group, difluorophenyl group, β-allocated with cyano group etc. Substituted hydrocarbon groups such as cyanoethyl group, γ-cyanopropyl group and β-cyanopropyl group can be mentioned. Particularly preferred organic groups are methyl _{groups, -CH 2 -CH 2 -CH 2 -NH} -CH 2 -CH 2 -NH 2 group, a phenyl group.

The organopolysiloxane of the component (A) may be a resin satisfying the above conditions, and its chemical structure, molecular weight, or properties are not limited. Further, the resin may be mainly composed of T units (SiO _3/2 ), Q units (SiO ₂ ), or a mixture thereof. Further, a resin in which M units (SiO _1/2 ) are present, for example, a resin composed of M units and Q units may be used.
Further, the form may be any form such as liquid, solid, flake-like, and powder.
Further, the component (A) may be a single component or a mixture of two or more kinds of components.

It is preferable that the component (A) is fluidized after the whole is homogenized. When it is difficult to emulsify as it is because the component (A) is mainly a solid resin or the like, the component (A) is given fluidity and the component (B) silica particles can be emulsified. The method of homogenization is not limited, but may be mixed with a normal device or other methods.
The degree of fluidity is not particularly limited, but it is preferable that the viscosity of the entire component (A) after homogenization is low. The upper limit of the viscosity varies depending on the apparatus used, but is about 100,000 mPa · s.

When the main component as the component (A) is a silicone resin having low fluidity, it is preferable to contain an organopolysiloxane having a viscosity relatively low with respect to the resin. As a result, fluidization occurs after homogenizing the entire component (A). The viscosity at 25 ° C. is preferably 1 to 2000000 mPa · s. It is more preferably in the range of 1 to 100,000 mPa · s, and particularly preferably in the range of 1 to 50,000 mPa · s. When it is less than 1 mPa · s and when it exceeds 2000000 mPa · s, emulsification is difficult and a stable aqueous dispersion cannot be obtained. There is no limit to the proportion of low-viscosity organopolysiloxane in the component (A), but if it is too large, the proportion of silicone resin will decrease in final applications such as cosmetics, and the desired properties may not be sufficient. is there.
The structure of such a component may be any as long as it is within the above conditions, but dimethylpolysiloxane is preferable from the viewpoint of availability, economy, and chemical stability. For example, liquid linear or cyclic dimethylpolysiloxane is exemplified.

The preferable content of the component (A) in 100 parts by mass of the emulsion is in the range of 20 to 80 parts by mass. If it is less than 20 parts by mass, sufficient emulsification accuracy cannot be obtained and the yield is lowered, and if it exceeds 80 parts by mass, the viscosity of the aqueous emulsion becomes high and the handleability deteriorates. More preferably, it is in the range of 30 to 70 parts by mass.

The component (B) silica particles are silicon dioxide particles produced by a synthetic method, and do not contain mineral-based silica such as diatomaceous earth and crystalline quartz. Examples of silicon dioxide produced by the synthetic method include fine powder of fumed silica, calcined silica, molten silica and the like produced by a dry method, precipitated silica produced by a wet method, and colloidal silica. These are known to those skilled in the art. Among these, calcined silica, precipitated silica or colloidal silica are preferably used. The silica particles (B) of the present invention may be hydrophilic silica in which a silanol group on the surface remains, or hydrophobic silica in which a silanol group on the surface is silylated. Hydrophobic silica is produced by a known method of treating hydrophilic silica with organosilicon halides such as methyltrichlorosilane, alkoxysilanes such as dimethyldialkoxysilane, silazane, and low molecular weight methylpolysiloxane. Can be done.

As the component (B) silica particles, when silica having a hydrophobic portion and a silanol group on the surface is used, the surface tension of the silica particles is set in a region required for surface activity, so that a normal surfactant can be used. Even if it does not exist, it can be placed at the oil phase / aqueous phase interface of the oil droplet to stabilize it.
The ratio of silanol remaining after silylation to the silanol group before silylation is preferably in the range of 50 to 95%. If the residual rate of silanol is less than 50% or more than 95%, the function equivalent to that of a surfactant at the oil phase / aqueous phase interface cannot be exhibited. Cyrilization or the residual rate of silanol can be determined by measuring the carbon content by elemental analysis or measuring the remaining amount of reactive silanol groups on the silica surface. The silica particles used for the preparation may include particles whose entire surface is silylated or particles whose entire surface is not silylated. However, it can be used as long as the overall silylation rate is within the above range and the required emulsifying function can be exhibited.

The carbon content of the silica particles having a hydrophobized moiety and a silanol group, which is preferably used as the component (B), is not limited as long as the purpose of functioning as a surfactant can be achieved, but is 0. It is preferably in the range of 1 to 10%. A stable emulsion cannot be obtained if it is less than 0.1% or more than 10%. More preferably, it is in the range of 0.1 to 10%.

The component (B) silica particles need to be in the form of particles rather than in the form of lumps. Further, it may be in the state of a primary agglomerate in which the primary particles are aggregated, or in the state of a secondary agglomerate in which the primary agglomerates are further aggregated. The particle size is not particularly limited, but it is generally preferable that the particle size is within the following range. The primary particle size is in the range of about 1 to 100 nm, the primary agglomerates are in the range of about 50 nm to 1 μm, and the secondary agglomerates are in the range of about 1 to 100 μm.
If the particle size is too small, it is difficult to obtain it industrially, and if the particle size is too large, the silica particles tend to settle as a simple substance.

The content of the component (B) in 100 parts by mass of the emulsion is preferably in the range of 0.3 to 10 parts by mass. If it is less than 0.3 parts by mass, the stability of the aqueous dispersion is inferior, and if it exceeds 10 parts by mass, the emulsion particles are excessively coated, and an unfavorable phenomenon such as a squeaky feeling occurs in cosmetic applications. More preferably, it is in the range of 1 to 7 parts by mass.

The method for producing the emulsion composition of the present invention is not particularly limited as long as it is within the range of the above method, but it can be produced by a known method. For example, it can be produced by mixing and emulsifying the above components using a conventional mixer suitable for producing an emulsion, for example, a homogenizer, a colloid mill, a homomixer, a high-speed stator rotor stirrer, or the like. In order to be more industrially stable and to control the shape and properties of the particles more advantageously, 20 to 80 parts by mass of the component (A) organopolysiloxane and 0.3 to 10 parts by mass of the component (B) silica particles are used. , Component (C) A method of obtaining an oil-in-water emulsion composition by dispersing in water is recommended.

More preferably, the method for producing an emulsion composition of the present invention is to fluidize the entire component (A) by homogenization with an organopolysiloxane having a viscosity at 25 ° C. of 1 to 2000000 mPa · s, and then the component (B). It is preferable to disperse the component (A) in water with the silica particles. As a result, when the component (A) is mainly composed of a solid resin or an elastomer and is difficult to emulsify, it can be emulsified by contacting it with the above-mentioned organopolysiloxane and fluidizing the whole. Therefore, the resin, which has been difficult to emulsify in the past, can exist in an emulsion state, and the problem can be effectively solved.
Further, as a more preferable production method, the powder solid of the component (A) is fluidized with polyorganosiloxane or the like, added to the aqueous dispersion of the silica particles of the component ( B ), and mechanically sheared. The example is to obtain an emulsion. In this case, as long as the powder solid of the component (A) dissolved by organopolysiloxane or the like can be put into the dispersion liquid of the silica particles of the component (B) and the water of the component (C), the silica particles of the component (B) Either the dispersion step of the component (C) with water or the fluidization step of the component (A) powder solid with organopolysiloxane or the like may be preceded.

The composition of the present invention contains polyoxyalkylene alkyl ethers such as polyoxyethylene tridecyl ether, polyoxyethylene hexadecyl ether, and polyoxyethylene octadecyl ether, and polyoxyethylene cured castor oil, as long as the object of the present invention is not impaired. oils, nonionic surfactants such as polyoxyethylene sorbitan esters, can be sodium lauroyl glutamate, irritation to the skin, such as dilauroyl glutamate lysine sodium contains mild ionic detergents.
The amount of the surfactant is preferably 0.1 part by mass or less, more preferably 0.06 part by mass or less, based on 100 parts by mass of the emulsion. If it exceeds 1 part by mass, it adversely affects the environment and reduces the cohesive force of silica particles, which impairs the storage stability of the product and the handleability at the time of dilution.

The composition for hair cosmetics of the present invention contains salicylic acid, sodium benzoate, sodium dehydroacetate, potassium sorbate, phenoxyethanol, methyl paraoxybenzoate, butyl paraoxybenzoate as preservatives as long as the object of the present invention is not impaired. May include.

The silicone emulsion composition of the present invention is not particularly limited, but it is preferable to use ion-exchanged water, preferably in the range of pH 2 to 12, and more preferably in the range of pH 4 to 10.

The particle size of the organopolysiloxane emulsion composition of the present invention is not particularly limited, but is preferably 100 μm or less. If the particle size exceeds 100 μm, the size of the particles is excessive and the stability of the emulsion particles is impaired. In the present invention, the average particle size can be measured by a particle size distribution measuring device N4Plus manufactured by Coulter.

As described above, the silicone resin emulsion composition of the present invention can be stably controlled in particle size by the organopolysiloxane and silica particles and by the production method thereof, and the variation in the particle size can be narrowed, so that the composition is stable in storage. Increases stability and stability during application development. Further, even when the resin is isolated, there is a possibility of giving high characteristics derived from the shape of emulsion particles and the like.

The silicone resin emulsion of the present invention is applied to a transparent or opaque substrate surface such as metal, ceramic inorganic material, concrete, mortar, glass, wood, paper products, plastics and rubber, and cured at room temperature or by heating. A curing protective film can be formed by allowing the film to be formed. This curable protective film has high hardness and high flexibility, has good water repellency, heat resistance, weather resistance, scratch resistance, and stain resistance, and further has adhesiveness.

Further, the silicone resin emulsion of the present invention is used as a water-repellent / polish agent used for the painted surface of the exterior of automobiles, trains, aircrafts, ships, etc., and as a water-repellent / stain inhibitor used for floors, carpets, etc. can do.

Further, the silicone resin emulsion of the present invention is isolated as a resin, and the obtained resin in the form of a powder or the like is added to the plastic or the like to modify the plastic, for example, to improve impact resistance or heat resistance. It can also be used as a material for raising.
As a method for isolating the resin, a spray-drying method or the like can be used.

Furthermore, the silicone resin emulsion of the present invention can also be applied to cosmetic applications, and can also be used for hair setting agents, mascaras, and skin care products that come into direct contact with the skin. In particular, it can be used as a film-forming agent for sun care products and point makeup products that are required to have waterproof properties and UV protection.

Next, the present invention will be described by way of examples. The present invention is not limited thereto. In addition, the storage stability evaluation method and the contact angle evaluation method with water in Examples and Comparative Examples were carried out as follows.

<Storage stability evaluation method>
30 g of the prepared oil-in-water silicone emulsion was placed in a 50 ml screw tube, and after 1 month of storage at room temperature or 50 ° C., the presence or absence of creaming and sedimentation separation was confirmed.
Evaluation criteria;
◯: No creaming, sedimentation separation, Δ: Tendency of creaming, sedimentation separation, ×: Creaming, sedimentation separation.

<Evaluation method of contact angle with water>
The contact angle measurement was carried out using a Contact Angle meter CA-X150 machine manufactured by FACE. A drop (about 0.002 cc) of ion-exchanged water was dropped on the surface of the clean coating film using a microsyringe, and the contact angle was measured after 1 minute. For the contact angle, the average value of 5 times was adopted.

<Example 1>
An oil-in-water silicone emulsion 1 was prepared as follows. As the silica particles, dry silica, which is an aggregate having a BET surface area of 200 mm ² / g, a carbon content of 10%, and a particle size of about 100 to 1000 nm, was used. This is hereinafter referred to as "silica particle 1". First, the silica particles 1 4.8 parts by weight of water 50 parts were dispersed by stirring at 4000rpm using an IKA Ltd. Ultra-Turrax T50 Basic shaft generator G45M, manufactured by adjusting the silica particle aqueous dispersion did. Next, in a separate container, 22.6 parts by mass of flake-shaped silicone resin was mixed and stirred with 22.6 parts by mass of dimethylpolysiloxane having a viscosity of 10 mPa · s (25 ° C.) with both ends sealed with a trimethylsilyl group. A mixed oil was obtained by dissolving. Next, the oil-in-water silicone emulsion 1 was obtained by adding the prepared mixed oil to the aqueous dispersion of silica particles 1 under stirring conditions of 4000 rpm.
The contact angle with water was measured to evaluate the storage stability of the oil-in-water silicone emulsion 1 and the water repellency of the coating film. Table 1 shows the formulation and evaluation results of the emulsion.

<Example 2>
An oil-in-water silicone emulsion 2 was prepared as follows. An oil-in-water silicone emulsion 2 was obtained in the same manner as in Example 1 except that 45.2 parts by mass of a silicone elastomer gel having a viscosity of 100,000 mPa · s (25 ° C.) was used as the component (A). The formulations are shown in Table 1.
The contact angle with water was measured to evaluate the storage stability of the oil-in-water silicone emulsion 2 and the water repellency of the coating film . The results are shown in Table 1.

<Comparative example 1>
An oil-in-water silicone emulsion 3 was prepared as follows. First, 22.6 parts by mass of a flake-shaped silicone resin is mixed and stirred and dissolved in 22.6 parts by mass of dimethylpolysiloxane having a viscosity of 10 mPa · s (25 ° C.) with both ends sealed with a trimethylsilyl group. A mixed oil is prepared, and 10 parts by mass of polyoxyethylene isotridecyl ether (EO 10 mol) and 44.8 parts by mass of water are used at 4000 rpm using an IKA Ultratarax T50 Basic Shaft Generator G45M. The mixture was dispersed by stirring to prepare an oil-in-water silicone emulsion 3. The formulations are shown in Table 1.
The contact angle with water was measured to evaluate the storage stability of the oil-in-water silicone emulsion 3 and the water repellency of the coating film. Table 1 shows the formulation and evaluation results of the emulsion.

<Comparative example 2>
An oil-in-water silicone emulsion 4 was prepared as follows. An oil-in-water silicone emulsion 4 was obtained in the same manner as in Comparative Example 1 except that 45.2 parts by mass of a silicone elastomer gel having a viscosity of 100,000 mPa · s (25 ° C.) was used as the component (A). The formulations are shown in Table 1.
The contact angle with water was measured to evaluate the storage stability of the oil-in-water silicone emulsion 4 and the water repellency of the coating film . The results are shown in Table 1.

<Comparative example 3>
An attempt was made to prepare an oil-in-water silicone emulsion 5 as follows. First, the silica particles 1 5 parts by weight of water 50 parts were dispersed by stirring at 4000rpm using an IKA Ltd. Ultra-Turrax T50 Basic shaft generator G45M, and the silica particle aqueous dispersion was made tone. Next, 45.2 parts by mass of flake-shaped silicone resin was added to the aqueous dispersion of silica particles under stirring conditions of 4000 rpm. No emulsion was obtained.

In Table 1, from the comparison between Example 1 and Comparative Example 1 and the comparison between Example 2 and Comparative Example 2, both the case of the silicone resin as the component (A) and the case of the elastomer gel are the components (B). ), The stability of emulsion storage is ensured, and as compared with Example 1 and Comparative Example 3, the emulsion is formed by mixing and stirring low- viscosity dimethylpolysiloxane in the component (A). It turned out to be secured.

Since the emulsion composition of the present invention can reduce the use of an organic surfactant without omitting it, it can be present as an environmental problem, stable production, and a stable emulsion form, and has characteristics in terms of application. Therefore, it can be widely applied to coating materials containing silicone resin and others. Further, since it is free of organic surfactants, it is useful as a cosmetic raw material to be applied directly to the skin from the viewpoint of hypoallergenicity, and may be used advantageously in many industries.

Claims (6)

(A) 20 to 80 parts by mass of an organopolysiloxane resin or an organopolysiloxane elastomer having an average composition represented by the general formula (1).
R ¹ aSiO _{(4-a) / 2} (1)
[In formula (1), R ¹ may be the same or different in the molecule, and is a substituted or unsaturated saturated or unsaturated monovalent hydrocarbon group having 1 to 25 carbon atoms, substituted or unsubstituted. It is an aromatic group having 6 to 30 carbon atoms, a hydroxyl group, an alkoxy group having 1 to 6 carbon atoms, or a hydrogen atom, and a is 0.3 or more and less than 2.0. ]
(B) 0.3 to 10 parts by mass of silica particles having a hydrophobic portion on the surface and a silanol group, and
(C) A composition containing water, in which the silica particles (B) are the oil phase of oil droplets composed of the organopolysiloxane resin or the organopolysiloxane elastomer (A), and the water. An emulsion composition characterized by being arranged at an interface with an aqueous phase comprising (C). The emulsion composition according to claim 1, wherein the organopolysiloxane is fluidized after homogenizing the whole. The emulsion composition according to any one of claims 1 or 2, wherein the silica particles have a residual ratio of silanol groups in the range of 50 to 95 mol% after silanol groups on the surface are silylated. object. A method for producing an emulsion composition.
The emulsion composition is
(A) 20 to 80 parts by mass of an organopolysiloxane resin or an organopolysiloxane elastomer having an average composition represented by the general formula (1).
R ¹ aSiO _{(4-a) / 2} (1)
[In formula (1), R ¹ may be the same or different in the molecule, and is a substituted or unsaturated saturated or unsaturated monovalent hydrocarbon group having 1 to 25 carbon atoms, substituted or unsubstituted. It is an aromatic group having 6 to 30 carbon atoms, a hydroxyl group, an alkoxy group having 1 to 6 carbon atoms, or a hydrogen atom, and a is 0.3 or more and less than 2.0. ]
(B) 0.3 to 10 parts by mass of silica particles having a hydrophobic portion on the surface and a silanol group, and
(C) The interface between the oil phase of oil droplets containing water and the silica particles (B) made of the organopolysiloxane resin or the organopolysiloxane elastomer (A) and the aqueous phase of the water (C). The silica particles (B) were previously dispersed in the water (C), and the entire organopolysiloxane resin or organopolysiloxane elastomer (A) was homogenized and fluidized. Is charged into the dispersion liquid of the silica particles (B) and water (C), and the organopolysiloxane mixture (A) is dispersed in the dispersion liquid, a method for producing an emulsion composition. A coating agent composition, which comprises using the emulsion composition according to claim 1, 2 or 3. A cosmetic composition comprising the emulsion composition according to claim 1, 2 or 3.