WO2009021354A1

WO2009021354A1 - Use of fumed silica in aqueous system

Info

Publication number: WO2009021354A1
Application number: PCT/CN2007/002420
Authority: WO
Inventors: Ying Wu; Hao Wang; Bing Liang; Shuchun Zhou
Original assignee: Wacker Chemicals Trading (Shanghai) Co. Ltd
Priority date: 2007-08-13
Filing date: 2007-08-13
Publication date: 2009-02-19

Abstract

Use of fumed silica in aqueous system, which comprises 0.002-20 wt% of fumed silica, 0.5-5wt% of surfactant, 1-20 wt% alkyl alcohol, silicone, additive and water, wherein alkyl alcohol includes C8-C22 linear alkyl alcohol.

Description

Application of fumed silica in aqueous systems

The invention belongs to the technical field of cosmetics or similar cosmetic compositions, and in particular relates to the use of fumed silica in aqueous cosmetic systems. Background technique

Fumed silica has both hydrophilic and hydrophobic properties. The hydrophilic fumed silica is obtained by hydrolyzing a volatile chlorosilane in an oxyhydrogen flame. It consists of high purity amorphous silica in the form of a loose white powder. Hydrophilic silica is wetted by water and can be dispersed in water.

The fumed silica unit has a tetrahedral structure. The Si0 ₄ / ₂ tetrahedrons are connected to each other by a silicon-oxygen bridge (Si-O-Si). On the surface of the fumed silica, one hydroxyl group is bonded to every other silicon atom to form a silicon decyl group. The silanol group imparts hydrophilicity to the fumed silica. As reaction centers, they can form hydrogen bonds between silica particles or with polar substances. Usually, in the hydrophilic fumed silica, two silicon decyl groups (Si-OH) are contained per square nanometer.

One of the most important properties of fumed silica is its ability to increase the viscosity of the system and impart a thixotropic effect.

When fumed silica is added to an oily or aqueous liquid, the particles can interact with each other, that is, mutual attraction. These surface stresses cause the aggregates to bond together to form larger agglomerates until a three-dimensional network structure of fumed silica is formed. With the formation of such a network structure, the viscosity of the liquid significantly increases. The special bulky structure of fumed silica means that a high viscosity can be obtained with only a small amount of fumed silica. For hydrophilic fumed silica, the interaction is primarily caused by hydrogen bonding between silanol groups on the surface of adjacent particles.

When a fluid to which fumed silica is added is moved by stirring, shaking or brushing, the system is subjected to shear stress. The interaction between the fumed silica particles is destroyed and relatively moved. The shearing action destroys the network structure of the fumed silica particles and makes the agglomerates smaller. The viscosity of the fluid is reduced. The greater the applied shear stress, the stronger the fluidity. This is the thixotropic effect of fumed silica in oily and aqueous systems.

The patent document US 5,520,908 discloses hydrophilic silica particles in a cosmetic composition which increase the brightness and hand of the hair, which is obtained by a structure formed by covalently joining the primary particles. of. WO-01-30310 also discloses a hair treatment composition comprising 0.01 to 5.0 wt% of non-aggregated or coalesced alumina, hydrated aluminum silicate having a particle size between 7 and 40 nm, Young's modulus At least 4GPa. However, these compositions are mainly used to improve the styling effect of hair. None of these prior art techniques relates to the use of silica particles in aqueous solutions.

It has long been believed that in aqueous systems, water molecules or polar molecules form hydrogen bonds with fumed silica, which greatly affects the association of fumed silica itself and weakens its presence in aqueous systems. Thixotropic effect. This makes the use of fumed silica in aqueous systems very limited. Summary of the invention

In the prior art, fumed silica is mostly used in aqueous and oily systems with weak hydrogen bonding. Existing water-based hair treatment products generally contain alcohols with strong hydrogen bonding, so gas-phase silica is generally not applicable to these products. In order to solve the above problems, the present invention proposes the following solutions.

Use of fumed silica in the preparation of aqueous systems containing alkyl alcohols. It can be used as a thickener to improve the static stability of the system, as a thixotropic agent to improve the dynamic coating of the system, and the application of the aqueous system to the hair can improve the combability of the treated hair.

The use of fumed silica as a thickener and thixotropic agent in aqueous systems containing alkyl alcohols, the characteristic tertiary structure, surface area and its amount in the system will significantly affect the thickening effect and the thixotropic of the system. nature.

The aqueous system in the present invention is defined as a system in which only an aqueous phase is present in the system, or in which multiple phases are present but water is a continuous phase.

"Thixotropic" in the present invention refers to the ability of the system to exhibit a lower viscosity with shear and the ability to restore its structure over a period of time after shear removal.

The use as described above, wherein the alkyl alcohol comprises an alkyl alcohol having an HLB value between 8 and 18, including a C ₈ -C ₂₂ alkyl alcohol, preferably cetyl alcohol, octadecyl alcohol, twenty Dialkyl alcohol,

The use as described above, wherein the fumed silica comprises from 0.002 to 20% by weight, preferably from 0.1 to 0.5% by weight, based on the total amount of the aqueous system formulation.

For the application as described above, the fumed silica used must satisfy the following conditions:

Wherein, the fumed silica is a hydrophilic fumed silica prepared by pyrolysis; wherein 95% or more of the primary particles have a particle diameter of 5-30 nm, and the aggregated particles have a size of 100-250 nm; The structure has a particle size of between 10 and 15 μm and a specific surface area of between 100 m ² /g and 500 m ² /g, determined according to DIN 66131 / 66132;

The use as described above, wherein the system comprises fumed silica between 0.002 and 20% by weight, preferably between 0.1 and 0.5% by weight; the surfactant is between 0.5 and 5% by weight, preferably between 1.0 and 4% by weight; The base alcohol is between 0.1 and 20% by weight, preferably between 3 and 10% by weight; the silicone compound is between 0.1 and 10% by weight, preferably between 0.5 and 3% by weight, and the remainder of the water, the total amount of the formulation is 100wt %.

As described above, the additives in the cosmetic composition include: an absorbent, an astringent, an antioxidant, an antiperspirant, an antifoaming agent, an antidandruff active ingredient, an antistatic agent, a binder, a biological additive. /bioactive components, chelating agents, deodorants, emollients, surfactants, emulsion stabilizers, depilatory agents, colorants, humectants, film formers, perfumes, hair colorants, preservatives, anti-corrosion agents, Oxidants, antioxidants, plant extracts, buffers, reducing agents, detergents, propellants, dyes, UV filters and absorbents, denaturants, viscosity modifiers and vitamins. In the above applications, the preservative also includes carson. The composition as described above, wherein the fumed silica is a hydrophilic fumed silica, preferably a hydrophilic fumed silica prepared by a pyrolysis method.

The physicochemical parameters of the fumed silica particles of the present invention such as specific surface area, particle size distribution, pore volume, packing density and concentration of silicon sterol groups, pore size distribution and pH can be changed according to the prior art, spray, The conditions of tempering and silicon deuteration are obtained.

The application as described above, wherein

The alkyl alcohol also includes 0.1 to 10% by weight of the total formulation ( ₂ _ ₅ polyol; preferably glycerol, ethylene glycol, butylene glycol;

Surfactants include cationic surfactants; preferably six, eight, ten, twelve, fourteen, sixteen, eighteen, twenty, twenty-two, twenty-four, twenty-six, twenty-eight, thirty-decane Trimethylammonium chloride; more preferably cetyltrimethylammonium chloride, octadecyltrimethylammonium chloride;

The silicone compound is a polyorganosiloxane which exists in a liquid state at normal temperature, and includes, for example, an amino-substituted silicone, an alkyl-substituted silicone, an alkoxy-substituted silicone, a polyether-substituted silicone, a silicone resin, and a silicone elasticity. Preferred; dimethyl silicone, methyl silicone, cyclomethicone, phenyl substituted silicone.

For the application as described above, the form of the aqueous system product is liquid, spray, gel.

A method of preparing the above aqueous system product, the steps are:

(a) mixing water, alkyl alcohol, fumed silica powder or fumed silica dispersion, stirring, heating to 85 ° C -95 ° C;

(b) Mix the surfactant, another portion of the alkyl alcohol, stir, and heat to 85 ° C - 95 ° C.

(c) Add the raw materials of group (b) to the raw materials of group (a) under high-speed dispersing and stirring, stir for 1.0-20 minutes, mix well and then cool down;

(d) Maintain high-speed dispersion stirring conditions, the system temperature is between 40-50 ° C, add silicone compounds, additives and make up the amount of water in proportion.

The high-speed dispersion stirring condition refers to 1000-5000 rpm, or even higher rotation speed, depending on the specific product.

In production or experimentation, when the viscosity of the system no longer increases, it is indicated that the fumed silica powder has reached the desired degree of dispersion in the aqueous system. '

The method for producing a composition as described above, wherein the fumed silica dispersion in the component (a) has a solid content of 0.002 to 40% by weight; preferably 10 to 20% by weight.

The application as described above includes applying it to an aqueous hair cleaning, treating and decorating product containing an alkyl alcohol, wherein the hair cleansing product is preferably a shampoo, a shampoo, a hair treatment product, preferably a hair mask, a hair lotion, a hair care product. Preferably, the hair decoration product is preferably a styling agent, a spray-type hair conditioner, a hair styling foam, and a hair gel.

With the above scheme, fumed silica has been successfully applied to an aqueous cosmetic system containing an alkyl alcohol. The obtained liquid or gel-like composition has the characteristics of good storage stability and good shear fluidity; in addition, the above aqueous cosmetic system gives the treated hair an unexpectedly easy combability and gloss. DRAWINGS

1 is a schematic view showing the comparison of viscosity results of each sample in Example 1 at different rotation speeds;

2 is a schematic diagram showing a comparison of thixotropic indices of each sample in Example 1;

Figure 3 is a schematic diagram showing the comparison of hair combing force results before and after washing;

Figure 4 is a schematic diagram showing the comparison of the frictional results of the hair surface before and after washing;

Fig. 5 is a schematic view showing the comparison of sensory satisfaction obtained by applying the sample of Example 1. detailed description

1 Experimental formula and preparation steps

A preferred specific formulation of the present invention is: Cetyltrimethylammonium chloride (Cognis Corning) 2.5 parts, cetyl alcohol (or cetyl alcohol, Cognis Corning) 5 parts, gas phase two 0.45 parts of silica (Wacker HDK® N20), 3 parts of glycerol (Dow Dow Chemical), 1.5 parts of dimethyl silicone oil (Wacker Belsil® DM6008), Carson (or 5-chloro-2-methyl) 4-isothiazolin-3-one, Rohm and Haas Rohm and Haas Company 0.1 part, 86.9 parts of deionized water, all of which are by weight.

The method of preparing the composition is as follows:

(a) Mixing a hydrophilic substance (50 parts of water, 3 parts of glycerol, 0.35 parts of HDK® N20 from WACKER) and heating to 90 ° C with stirring _;

(b) A lipophilic substance (2.5 parts of cetyltrimethylammonium chloride (1631), 5 parts of cetyl alcohol) was mixed and heated to 90 ° C with stirring.

Under the condition of high-speed mechanical stirring of lOOOrpm, add the substance of group (b) to the substance of group (a), stir for 15 minutes, mix evenly and then cool down;

Maintain high-speed mechanical agitation conditions, add 1.5 parts of DM6008, DM6008, 0.1 parts of Carson and make up 36.9 parts of water in the system temperature between 45 °C and 50 °C.

After the temperature of the system dropped to room temperature, the stirring was stopped. A sample No. 5 o of the present invention containing fumed silica HDK® N20 was obtained. Comparative samples No. 1-4 were prepared by a conventional method, and the specific formulations are shown in the following table (each ratio is by weight): Paraffin wax was obtained from the sample. Frank B. Ross Company, Inc., Carboxymethyl Cellulose from Amerchol Corporations

No.l No.2 No.3 No.4 No.5

INCI Name Chinese Name

Cetyltrimethylammonium cetyltrimethylammonium chloride 2.5 2.5 3.2 2.5 2.5 chloride

Cetearyl alcohol Cetyl alcohol 5 5 6.4 5 5 No.l No.2 No.3 No.4 No.5

INCI Name Chinese Name

C ₃₀ . ₅ Alkyl Methicone C _30-45 alkyl silicone 1 1 1 1 1

MM8030 MM8030

Paraffin Paraffin 1 1 1 1 1

Hydroxyethylcellulose hydroxyethylcellulose 1 1 1 0.75 1

Silica ( HDK®N20) Gas Phase Silicon Dioxide 1 1 1 1 0.35

HDK®N20

Glycerin Glycerol 3 3 3 3 3

Dimethicone Dimethicone 1.5 1.5 1.5 1.5 1.5 DM6008 DM6008

Methylchloroisothiazollinone Carson 0.1 0.1 0.1 0.1 0.1 and Methylisothiazolinone

Deionized water Deionized water 86.9 86.9 86.9 86.9 86.9

The main thickener of the No. 1 comparative sample was 1% paraffin. The thickener of the No. 2 comparative sample was 1% MM 8030 (C _{3 (M5} mercapto silicone), which was designed to improve the combing performance and good hand feeling of the conditioner. No. 3 Comparative sample was added with a relatively higher addition amount ( 6.4%) of cetyl alcohol and 3.2% of hexadecanolyltrimethylammonium chloride (1631) as a thickener, and can be used to improve the slippery feel of conditioner. No. 4 Comparative sample thickener is 0.75% Hydroxyethyl cellulose No. 5 The thickening agent used in the inventive sample was 0.35% HDK® N20.

The difference in performance between the composition No. 5 containing the fumed silica HDK of the present invention and the comparative sample No. 1-4 was as follows: 2 Conditioning and thickening properties of fumed silica and other thickeners Comparison of aspects

2.1 Experimental part

In order to better evaluate the practical effect of the aqueous cosmetic composition containing fumed silica on conditioner conditioning and thickening performance improvement, we conducted a series of comparative experiments to add fumed silica with conditioner and tradition. Hair conditioners were compared. The performance of these conditioners in terms of combing and sensory satisfaction was evaluated.

2.2 Evaluation test

2.2.1 Viscosity and thixotropic index test

Viscosity is used to indicate the resistance of a substance to flow. This value shows the flow properties of different fluid systems. The conditioner system should have a pseudoplastic behavior, ie the viscosity of the system is reduced by the action of external forces. The thixotropic index is a measure of the pseudoplastic properties of the system and is determined by the ratio of the two viscosities at different shear rates. In this experiment, the viscosity at 5 rpm and 50 rpm was selected to determine the thixotropic index. Viscosity and thixotropic index test results are shown in Figures 1 and 2, respectively. 2.2.2 Gloss test

Gloss is an important reference index for the appearance of conditioners. It is the property of the directional selective reflection of the surface of the object. This property determines the degree of strong reflected light or image of the object that can be seen on the surface of the object. The gloss of the material is often expressed in terms of specular gloss. The specular gloss refers to the ratio of the specular reflectance of a sample to the specular reflectance of a reference plane under the same conditions at a predetermined incident angle. Expressed as a percentage, the percent sign is generally omitted, expressed in gloss units. It can be divided into 20°, 45°, 60° or 90 depending on the angle of incident light. Mirror gloss. One thing to note is that as the angle of incidence increases, the gloss value of any surface increases. Therefore, in determining the specular gloss, the angle of incident light must be determined, or when indicating the specular gloss of the material, the angle must be specified.

In this experiment, a gloss test was performed using a Dr. Lange REF03-D gloss meter 20/60/85 degrees. The gloss value can be read directly from the display. The results are shown in the table below. Table 2: Comparison of gloss results

2.2.3 Comb force and surface smoothness test

2.2.3.1 Comb force

Comb force is a measure of the frictional resistance of a hair comb, and combing power is especially important to the consumer because it is a property that the consumer can not only perceive but also be able to touch. Comb rationality is a major property in evaluating hair conditioning and is an important indicator for evaluating the performance of hair care products [Xia Juntao, Xu Yalin, Zhu Haiyang. Hair care effect and characterization of polymer conditioners, 2006 (ninth) International Surface Surfing/Detergent Conference Proceedings [M].72-76].

In this experiment, the same source hair bundle was divided into 5 equal amounts, and after treatment with 5 kinds of conditioners, the Instron double-column bench type 3365 model was used to test the process of combing hair in daily life. The combability of the hair bundle is characterized by measuring the resistance experienced by the comb as it passes through the hair bundle. Each hair bundle test is averaged 10 times, and attention is paid to reducing fluctuations between data. See Figure 3 for the test results before and after washing.

2.2.3.2 Surface friction test

Surface friction is a measure of the roughness of the hair bundle surface. The moisturizing ingredients of the conditioner effectively smooth the curled hair and make the hair softer and easier to comb. The surface of the hair is smooth and flat, and it reflects light.

In this experiment, the same source hair bundle was divided into 5 equal parts, treated with 5 kinds of conditioners, and tested by Instron double-column bench type 3365 model, by measuring the friction of the hair bundle surface. Coefficient, table The roughness of the surface of the beam is marked. Take an average of 5 times for each hair bundle test, taking care to reduce fluctuations between data. See Figure 4 for the test results before and after washing.

2.2.4 Sensory Satisfaction Test

An evaluation panel of 15 people assessed the ease of application of conditioner. Using the blind test, the assessor separately applied the two conditioners in each test group to the uniformly prepared aluminum foil, and then compared, voted, and statistically calculated results. A high number of votes indicates that the conditioner is easier to apply than another conditioner in the group. See Figure 5 for comparison results.

2.3 Conclusion

In order to demonstrate the excellent thickening properties of fumed silica in conditioner systems, four performance tests were performed on conditioners and conventional conditioners added to fumed silica. The results are summarized below.

2.3.1 Viscosity and thixotropic index test results (as shown in Figures 1 and 2), compared with the results of the other groups, the fifth group of HDK conditioners have a relatively high viscosity. At 5 rpm and 50 rpm, the viscosities reached 31,680 cP and 4672 cP, respectively, which were significantly higher than the 26960 cP and 4936 cP of the N0.3 sample.

At the same time, the 'N0.5 sample of the present invention reached 6.8 compared with the rheology index 5.9 of the NO.l added lwt% paraffin sample.

This shows that HDK works very well as a thickener. HDK can be used to effectively control the pseudoplastic and thixotropic behavior of conditioners. Since increasing the amount of fumed silica produces more interaction between silica particles, the conditioner system using fumed silica as a thickener not only has a high apparent viscosity but also a high thixotropic property. index.

The pseudoplasticity referred to herein is defined as a liquid which exhibits a significant viscosity reduction as the shear rate increases. This behavior, also known as shear thinning, means that the flow resistance of the material decreases as the energy required to maintain flow at high shear decreases.

2.3.2 Gloss test results show that the addition of fumed silica is more helpful in improving the gloss of the conditioner system due to its high degree of uniformity and transparency in the system compared to conventional hair conditioners.

2.3.3 The combing force and surface smoothness test results (Figure 3 and Figure 4), whether for the combing force or surface smoothness of dry and wet hair bundles, the addition of fumed silica products and traditionality Hair conditioners have a significant improvement compared to each other.

2.3.4 Sensory satisfaction test results showed that the conditioner added with fumed silica obtained higher evaluation satisfaction in ease of smear than other groups of traditional hair conditioners. The important contribution of fumed silica to the rheological and thixotropy improvement of fluid systems has also been demonstrated again. N2007/002420

3 Comparison of fumed silica products with fumed silica as a thickener and commercially available products

Select three commercially available products on the market, labeled Ml, M2 and M3. According to the experimental procedure 1, the hair conditioner product to which fumed silica was added as a thickener was compared with the three commercially available products in terms of combing force and surface smoothness. The results showed that the hair conditioner product added with fumed silica as a thickener had a significant advantage in improving the combing power and surface smoothness of the hair relative to the three commercially available products. .

4 Comparison of different types of fumed silica

Choose three vapor-phase silica products with different specific surface areas: HDK ® V15, HDK ® N20, HDK ® T30 (corresponding specific surface areas of 150, 200, 300m ² /g are all hydrophilic products, no Surface treatment). The above three products were used as thickeners, and conditioners having a fumed silica input amount of 0.2% by weight and 0.35% by weight were prepared in accordance with Experimental Procedure 1, and the viscosity was measured.

As a result, the HDK type having a higher specific surface area on the surface can contribute higher viscosity to the system at the same input amount. Similarly, for conditioners that incorporate the same type of HDK, systems with higher HDK inputs have higher viscosity.

5 Comparison of fumed silica powder and dispersion

The composition of the present invention may contain not only powdered fumed silica but also fumed silica aqueous dispersion. This fumed silica dispersion is obtained by dispersing a hydrophilic fumed silica in water by a high shear action. Its stability stems from the stability of static electricity and atomic arrangement space [2]. In the present invention, corresponding to the HDK powder types V15, N20 and T30, respectively, an aqueous dispersion of fumed silica produced by Wacker Company type D1515B, D2012B and D3017B is used, and the dispersion contains only deionized water and V15, N20. And T30 powder. The mass concentrations of V15, N20 and T30 in the three aqueous dispersions were: 15%, 12%, and 17%, respectively.

According to the test step 1, the same type of HDK powder and dispersion are added to the system to prepare the hair conditioner with the same net amount of HDK, and the amount of water added to the dispersion is adjusted. The viscosity is measured. After the shear time is increased to 100 min, the viscosity of the HDK powder is sufficiently dispersed to be consistent with the dispersion.

Regardless of the addition of H K powder or dispersion to the system, the viscosity of the system increases with increasing shear time. Since the dispersion is pre-dispersed in production, its corresponding system viscosity is slightly reduced. In further research, it was found that the HDK dispersion also exhibited excellent dispersing properties, resulting in good storage stability of the product, and the carding effect after use was superior to the other samples in Example 1.

6 Influencing factors of the viscosity of the conditioner system of fumed silica as a thickener

There are many factors that affect the viscosity of the conditioner system, such as the type of thickener, the amount of input, the strength of dispersion, and the like. In this series of experiments, other influencing factors were fixed, and efforts were made to study the effects of HDK input, shear force and dispersion time on the viscosity of the system. 20 sets of experimental points were designed using MINITAB software, and experiments were carried out according to experimental step 1, and the viscosity of each group was measured. The experimental results were analyzed in the MINITAB software.

Under the same shear time and shearing force, the viscosity of the system increases with the increase of HDK input. This result is consistent with the results of 4, both benefiting from the good thickening ability of HDK. The more HDK is added, the more significant the thickening effect of the system. ·

Shear time and shear force are related to the viscosity adjustment of the system. Here, the correlation function can be called "shear energy". For a given amount of HDK input, the viscosity increases as the "shear energy" increases and then decreases after reaching the maximum viscosity value. This is because during the initial increase of "shear energy", HDK is more well dispersed, forming a large-area three-dimensional network structure in the system to increase the viscosity of the system, and after reaching the maximum viscosity, with "shear energy" "With the further increase, some of the silanol groups of HDK are wetted in the system, causing the viscosity of the system to decrease.

The above description of the embodiments is intended to facilitate a person skilled in the art to understand and apply the present invention. It will be apparent to those skilled in the art that various modifications may be made to these embodiments and the general principles described herein may be applied to other embodiments without the inventive work. Therefore, the present invention is not limited to the embodiments herein, and those skilled in the art, in light of the present disclosure, are intended to be within the scope of the present invention.

Claims

Rights request

1. Use of fumed silica in the preparation of aqueous systems containing alkyl alcohols.

2. Use according to claim 1, characterized in that fumed silica is used to improve the stability and thixotropy of an aqueous alkyl alcohol-containing system.

3. The use of claim 2 is preferably cetyl alcohol, stearyl alcohol, behenyl alcohol, characterized in that the alkyl with alcohols include alkyl alcohols of C ₈ -C _22.

4. Use according to claim 1 or 2, characterized in that the fumed silica comprises between 0.002 and 20% by weight, preferably between 0.1 and 0.5%, of the total formulation of the aqueous system.

0. The use according to claim 1 or 2 or 3, characterized in that the fumed silica to be used is sufficient for the following conditions:

Wherein, the fumed silica is a hydrophilic fumed silica prepared by pyrolysis; wherein 95% or more of the primary particles have a particle diameter of 5-30 nm, and the aggregated particles have a size of 100-250 nm; The tertiary structure has a particle size between 10 and 15 μm, a specific surface area between 100 m ² /g and 500 m ² /g, and a root 5 as determined according to DIN 66131 / 66132.

6. Use according to claim 1 or 2 or 3, characterized in that the aqueous system contains fumed silica at 0.002-20 wt ° /. Between, preferably between 0.1 and 0.5 wt%; the surfactant is between 0.5 and 5 wt%, preferably between 1.0 and 4 wt%; the alkyl alcohol is between 0.1 and 20 wt. Between 3-10 wt%, preferably between 10 and 10 wt%; between 10 and 10 wt%, preferably between 0.5 and 3 wt%, and the remainder of the water, with a total of 100 t% .

7. The application of claim 6 wherein:

The alkyl alcohol further includes a c ₂ -c ₅ polyol which accounts for 0.1-10% of the total amount of the formula; specifically includes ethylene glycol, glycerin, butanediol;

Surfactants include cationic surfactants; preferably six, eight, ten, twelve, fourteen, sixteen, five eighteen, twenty, twenty-two, twenty-four, twenty-six, twenty-eight, thirty Mercaptotrimethylammonium chloride;

More preferred is cetyltrimethylammonium chloride, octadecyltrimethylammonium chloride;

The silicone compound includes, for example, an amino-substituted silicone, an alkyl-substituted silicone, an alkoxy-substituted silicone, a polyether-substituted silicone, a silicone resin, a silicone elastomer; preferably a dimethyl silicone oil, a methyl silicone , cyclomethicone, phenyl substituted silicone.

0. The use according to claim 6, characterized in that the aqueous system further comprises an additive comprising: an absorbent, an astringent, an antioxidant, an antiperspirant, an antifoaming agent, an antidandruff active ingredient , antistatic agents, binders, biological additives / bioactive components, chelating agents, deodorants, emollients, surfactants, emulsion stabilizers, depilatory agents, colorants, moisturizers, film formers, perfumes , hair coloring agents, preservatives, anti-corrosion agents, oxidizing agents, antioxidants, plant extracts, Buffers, reducing agents, detergents, propellants, dyes, UV filters and absorbents, denaturants, viscosity modifiers and vitamins; wherein preservatives include: Carson. -

9. Use according to claim 1 or 2 or 3, characterized in that the form of the aqueous system is a liquid, a spray, a gel.

10. The use according to claim 9, characterized in that fumed silica is applied to an aqueous hair cleaning, treating and decorating product containing an alkyl alcohol, wherein the hair cleansing product is preferably a shampoo, a shampoo, a hair treatment product Hair mask, hair lotion, hair conditioner, hair styling product, styling agent, spray type hair conditioner, hair styling foam, hair gel are preferred.

11. A method of preparing a product formed from the aqueous system of claim 1 or 2 or 8 or 10, characterized in that the steps are:

(a) mixing, stirring, heating to 85-95 V of water, alkyl alcohol, fumed silica powder and / or fumed silica dispersion;

(b) mixing the surfactant, another portion of the alkyl alcohol, stirring, heating to 85-95 ° C;

(c) adding the raw materials of group (b) to the raw materials of group (a) under high-speed dispersing and stirring, stirring for 10-20 minutes, mixing uniformly and then cooling;

(d) Maintain high-speed dispersion and stirring conditions. The temperature of the system is between 40 and 50 °C. Add silicone compounds and additives in turn and make up the water in proportion.

12. Process for the preparation of a product formed from an aqueous system according to claim 11, characterized in that the solid content of the fumed silica dispersion in the component (a) is between 0.002 and 40% by weight; preferably 10 to 20% %between.