SE459318B - SUSPENSION OF A POLAR LIQUID PRODUCT IN AN OIL-SPECIFIED LIQUID AND MANUFACTURING THEREOF - Google Patents

Abstract

A liquid product system containing an oily liquid suspending component and fine particles of a polar liquid component, immiscible in the oily liquid, suspended in said oily liquid component by means of a hydrophobic oxide. The polar liquid may contain an active ingredient dissolved or suspended therein such that the suspension is employable as a body lotion, hair-care or-colouring product, pharmaceutical composition or food dressing. The hydrophobic oxide is typically silica, but may be an oxide of Al, Ti, Zr or Fe.

Description

.J 459 318 means, prone to be unreliable and exhibit significant variations from batch to batch. This often manifests itself as a "bleeding" of the oil phase in the water-in-oil emulsion products using these organic surfactants and a loss of the integrity of the aqueous phase.

By utilizing the hydrophobic oxides in accordance with the present invention, the above-mentioned disadvantages are avoided. The hydrophobic oxides are harmless materials which do not adversely affect the activity of the products in which they are incorporated, nor do they impart any negative organoleptic properties to such products. Furthermore, the suspension products obtained according to the present invention are very stable.

The liquid composition of the present invention contains an oily liquid suspension component having fine particles of a polar liquid suspended therein, which are immiscible with the suspension component; the fine particles are kept in suspension in the suspension component by the presence therein of an effective amount of fine particles of hydrophobic metal oxide such as silica or a hydrophobic metalloid oxide, the polar liquid advantageously constituting from about 5% by weight to about 80% by weight of the composition; the oily liquid suspension component advantageously constitutes from about 20% by weight to about 95% by weight of the composition and the hydrophobic metal or metalloid oxide advantageously constitutes from about 0.25% by weight to about 0% by weight of the composition.

Fig. 1 is a photomicrograph of a sample of a composition according to the present invention using a hydrophobic silica, the magnification being 10 times.

Pig. 2 'is a photomicrograph of a composition utilizing a conventional fumed silica, the magnification being times, and is shown for comparison purposes.

The polar liquid component included in the systems of the present invention may be one of the most diverse materials. These include simple liquids, liquid / liquid solutions, liquid / liquid suspensions, solids / liquid solutions, solid / liquid suspensions. Mostly, the polar liquid component of the present invention is in the form of a polar solvent system in which one or more active ingredients, which may be liquids or solids, are dissolved or suspended.

In the field of health care, active ingredients useful herein include physiologically or pharmaceutically active materials such as antiperspirants, deodorants, anesthetics, analgesics, antacids, antihistamines, decongestants, antitussives, laxatives, sunscreens, antifungals, flavoring agents. antifungals, salivating agents, etc.

These can be used for the manufacture of antiperspirant products, deodorant products, toothpastes and other oral hygiene products, mouth freshening products, sprays for sore throats, externally applicable anesthetic products, liquid antacid products, nasal sprays, antitussives, cold relievers, etc. .

The present invention can also be used for cosmetic products and toilet products such as hand and body lotions, hair care products, hair coloring products, cosmetics, etc. In these cases, the active ingredients contained in the polar liquid component may be conditioning agents, rubber products, dyes, surfactants. agents, resins, proteins, emollients, glycols, pantanol, vitamins, urea, etc.

The invention can also be used in the food industry in the manufacture of such articles as salad dressings, puddings, desserts, etc. In these cases, the active ingredients may be flavoring agents such as vinegar, spices, sugar, syrup, etc.

A variety of polar solvent systems can be used in the preparation of the polar liquid component of the present invention. These can be simple one-component systems 459 318 or multi-component systems. For malicious purposes, such materials as water, alcohol / water, propylene glycol, glycerol, 1,3-butylene glycol, water / propylene glycol, water / glycerol, water / 1,3-butylene glycol, sorbitol, water / sorhitol, etc. may be mentioned.

The concentration of the active ingredients contained in the polar liquid components naturally varies from application to application and in accordance with the desired results. However, they must be present at such levels that the intended function of the composition is achieved. In general, these concentration levels range from about 0.1% to about 40.0% by weight, based on the total weight of the composition.

One field of application of the present invention, which is of particular interest, involves the use of this system in antiperspirant products. In this case, the solvent system is generally water or aqueous alcohol, in which the active antiperspirant material or active antiperspirant materials are dissolved. Such systems contain the antiperspirant material in concentrations that are effective for antiperspirant purposes. These levels are usually in the range of from about 0.1% to about 40.0% by weight, based on the total weight of the composition.

The antiperspirant material used in the present invention can be any active, water-soluble ionizing antiperspirant material capable of providing antiperspirant active ions. Many materials of this type are known in the art. However, it is preferred that the active ionic material contain aluminum, zirconium, tertiary amine salt or quaternary nitrogen. By way of illustration, the following materials may be mentioned: aluminum chloride, aluminum chlorohydroxide, aluminum formate, aluminum phenol sulfonate, aluminum phosphate, aluminum sulfate, aluminum methionate, zirconyl hydroxychloride, zirconium lactate, zirconium carbonate, scopolamine hydrobromicurombrotide, polopolamine hydrobromycarbonide its glycine complex, aluminum / zirconium trichlorohydrate and its glycine complex, etc. and mixtures thereof.

Another essential component of the systems according to the invention is the suspension component. This is the phase in which the polar liquid component described above is suspended. As mentioned earlier, the suspension component is selected so that the liquid polar component is immiscible therewith and / or insoluble therein. The suspending component is generally an oily hydrophobic liquid at ambient temperature and is usually selected for end use. If the product is intended for use as a food, the oil is usually an edible oil such as a vegetable oil. This can be exemplified by the following: soybean oil, peanut oil, corn oil, safflower oil, olive oil, etc. and mixtures thereof.

If the product is to be used as a cosmetic or toilet preparation comprising antiperspirants, the oily material may be a long chain fatty acid ester, a silicone oil, a mineral oil, etc. Examples of oily materials which can be used according to this act of the invention include such materials. such as isopropyl myristate, butyl stearate, dimethyl silicone, apricot oil, diisopropyl sebacate, volatile silicones, for example cyclomethicone), etc. and mixtures thereof.

When the product is to be used for oral hygienic purposes, for example as liquid toothpaste, mouthwash and breath freshener, the oily component may be dimethylsilicone oil, mineral oil, vegetable oil, cyclomethicone, etc. or mixtures thereof.

The present invention can be used in products which are useful for medical purposes and are intended to be applied to the mucous membranes, for example in the nose, throat, vagina, anus, etc.

These products may be in the form of medical sprays (for example, sore throat sprays, nasal sprays) or in the form of preparations intended to be applied as gargle or by means of a swab or vaginal or anal dispensing applicators. In these cases, the oily component may usually be any of the following materials: dimethylsilicone oil, mineral oil, vegetable oil, fatty acid esters, etc. and mixtures thereof.

The present invention can also be used for applying medicinal preparations to external skin surfaces. Examples of such preparations are topical anesthetics, topical analgesics, sunscreen preparations, sunscreen compositions, topically applicable antibacterial or antifungal preparations. Oily materials which may be used in these cases as oily components include such materials as fatty acid esters, mineral oils, silicone oils, etc. and mixtures thereof.

Likewise, the system disclosed herein may be used in connection with medical products intended for internal use. These include such products as antacids, laxatives, etc. The oily component in these cases is pharmaceutically acceptable material. Examples of such oily components are mineral oil, vegetable oils such as corn oil, soybean oil, peanut oil, etc. and mixtures thereof.

The oily component may comprise only the oily component as such or it may contain other conventional additives. The choice of additive depends on the special function that the composition is to perform.

The third essential component of the systems of the present invention is the hydrophobic oxide, i.e. a fumed oxide with a strongly hydrophobic surface. Hydrophobic pyrogenic silicas are the preferred materials. These silicas differ from the conventional fumed silica (eg Cab-O-Sil) by the method of preparation which gives the product its hydrophobic character. These hydrophobic products are prepared by reacting the conventional fumed silica with an organosilane such as haloalkylsilanes (e.g. dimethyldichlorosilane) under such conditions that a chemical reaction occurs with a substantial portion of the hydroxyl groups in the surface of the fumed silica. This gives a new surface structure on the outer or exposed parts of the silica, which structure essentially consists of hydrocarbon groups.

The preparation of hydrophobic silicas useful for the purposes of the present invention is described in U.S. Pat. No. 3,393,155, column 2, line 25 to column 3, line 18, and in the working example, column 3, line 70 to column 4, line 6, to which it is referred as follows: As pointed out therein, the fumed silicas which can be used in the preparation of the hydrophobic silicas used according to the present invention are those having a surface area of at least about 100 m 2 / g and average equivalent particle diameters of less than 50 millimicrons. per gram. In order to obtain a sufficiently hydrophobic surface of the silicas for the purposes of the present invention, it is only necessary to attach to the surface at appropriate concentrations chemical complexes which carry hydrocarbon groups or similar organic groups. The molar concentration required per unit area is somewhat dependent on the number and size of the organic groups. However, for the organosilane complexes of primary interest, which carry 1-3 organic groups mostly of smaller size (for example, usually not more than 7 carbon atoms per group), the concentrations of the attached chemical complexes should be French (L2 mm For the preferred silica with BET surface areas of at least about 150 m 2 / g, the carbon content after surface treatment to give a suitable hydrophobic character is usually about 1% by weight or more.

A number of hydrophobic, commercially available silicas can be used in accordance with the present invention. These include "Aerosil R 972" or "Silica R 972" (Degussa Inc.), "Tullanox 500" (Qulco Inc.), "Silanox" (Cabot Corp.), etc. A preferred material is Silica R 972, currently marketed by Degussa Inc.

Although the hydrophobic silicas described above are the preferred materials for use in the present invention, other finely divided metal or 459 518 metalloid oxides whose surfaces have been made hydrophobic in a manner similar to that described above in the preparation of the hydrophobic the silicas. These generally have similar physical properties (eg surface area, particle size and concentration of chemical complex and the size of the organic groups) as the hydrophobic silicas. Typical such metal or metalloid oxides which can be used for the present purposes include such materials as aluminas, titanium oxides, zirconia and iron oxides which have been suitably treated to be hydrophobic. Materials of this type are described in published South African patent application 80/1954.

The relative amounts of polar liquid component, liquid oily hydrophobic component and hydrophobic oxide in the present compositions can vary widely depending on the intended use of the product and the properties desired. In general, the various components may be present in the concentrations given below: Weight% calculated on the composition Total weight of the component General range Preferred range Polar liquid 5.0 - 80.0% 30.0 - 60.0% Oily liquid 20.0 - 95.0% 30.0 - 65.0% Hydrophobic oxide 0.25 - 5.0% 0.5 - 2.0% The compositions of the present invention are generally prepared as follows: The hydrophobic oxide is suspended in the oily liquid phase with vigorous stirring. The active ingredients dissolve in the polar liquid phase. The polar liquid phase is then slowly added to the hydrophobic / oily liquid phase with vigorous stirring.

Although the invention is not to be bound by any particular theory, it is believed that the hydrophobic oxides act to encapsulate the fine particles of a polar liquid with a layer of hydrophobic oxide. This is accomplished due to the special charge characteristics of the hydrophobic oxide. By encapsulating the polar liquid particles with hydrophobic oxide in this way, the liquid particles are kept separate as separate particles from the continuous oily component which serves as a suspension phase. The liquid particles are thus distributed in the oily component in a relatively stable manner without the need for any surfactant.

There is several pieces of evidence to support the above theory. A coating involves conductivity measurements in which the electrical conductivity of compositions prepared with the hydrophobic silicas of the present invention is compared with the conductivity of comparable compositions utilizing a conventional hydrophilic silica, for example Cab-O-Sil M-5. In this study, two compositions were prepared in the manner indicated below.

Composition A Hydrophobic antiperspirant Ingredients Weight% 1. Aluminum chlorohydrol 50.00 (50% aqueous solution) 2. Deionized water 10.00 3. Aerosil R 972 (Degussa Inc.) 1.00 4. Silicone P 251 (SWS Corp.) 39.00 100.00 Preparation 1. Components 1 and 2 are weighed and mixed thoroughly. -2. Components 3 and 4 are weighed and mixed thoroughly. 3. Mixtures 1 and 2 above are combined by mixing while shaking vigorously. 459 318 'i Composition B Hydrophilic antiperspirant Ingredients Weight% 1. Aluminum chlorohydrol 50.00 (50% aqueous solution). 2. Deionized water 10.00 3. Cab-0-Sil MS (Cabot Co.) 1.00 4. Silicone P 251 (SWS Corp.) 39.00 100.00 Preparation 1. Weigh components 1 and 2 and mix thoroughly. - full. Components 3 and 4 are weighed into separate beakers and mixed thoroughly. 3.

Mixtures 1 and 2 are brought together by mixing with vigorous shear.

Conductivity measurements on composition A, which is a representative of the present invention, show that this composition does not conduct electric current. In contrast, the same measurements performed on composition B, which contain ordinary fumed silica, show that this composition conducts electric current. This shows that there is a fundamental difference between the two compositions. This provides evidence that the aqueous phase in composition A is isolated and separated from the continuous phase and that as a result the aqueous phase is not available to conduct electrical current. In contrast, the aqueous phase in composition B is unprotected, with the result that this composition conducts electric current.

Another evidence which serves to distinguish compositions utilizing a hydrophobic silica (Composition A above) from those utilizing conventional fumed silica (Composition B) is microscopic examination of respective products. In this context, reference is made to the accompanying drawing, which shows photomicrographs of samples of the respective products. Fig. 1 refers to the hydrophobic composition A and Fig. 459 318 11 2 the hydrophilic composition B. The figures show that in the composition with the hydrophobic silica (Composition A) the oil phase is seen as the continuous phase (ie the background) and the product has a well defined structure. In the case where hydrophilic silica is used (composition B), water constitutes the continuous phase and the structure is much less defined.

Films of each of the compositions (compositions A and B) were prepared on microscope coverslips and the contact angle of the water on these films was measured. The hydrophobic silica product (Composition A) gave a very high contact angle, namely 1050, while the hydrophilic silica product (Composition B) gave a low angle, namely 100, which indicates wetting.

At the macroscopic level, these differences are manifested through the stability of the respective products. Samples of compositions A and B were shaken about 10-20 times and then set aside. For about 0.5 hours, the hydrophilic composition (Composition B) separated into three visible phases. After standing for 0.5 hours, on the other hand, the hydrophobic composition (Composition A) did not show any separation that could be visually demonstrated.

The composite menu of the present invention can be used and applied as such or applied from an aerosol container. In this case, the composition of the present invention is introduced into the aerosol container as a concentrate to which the propellant is added. In general, such products contain between about 35.0 and about 70.0% by weight of the composition, based on the total weight as a concentrate and between about 25.0 and about 75.0% of fuel.

As mentioned above, preferred compositions of the present invention are antiperspirant products. These compositions generally contain as polar liquid from about 25% to about 40% by weight of water, based on the total weight of the composition, wherein 459,318% is dissolved from about 15% to about 25% by weight of active antiperspirant, based on the same weight base. The preferred oily liquid is a silicone oil and preferably a volatile silicone oil.

This normally constitutes between about 30% and about 50% by weight, based on the total weight of the composition. This system requires only a small amount of hydrophobic oxide {preferably a hydrophobic silica, to adequately encapsulate the fine particles of antiperspirant liquid. The amount of hydrophobic oxide is usually in the range of from about 0.25 to about 2.0% by weight, based on the total weight of the composition, with the preferred range being between about 0.5 and about 1.0% by weight, based on same weight base. The beneficial properties of an antiperspirant composition of the present invention can be summarized as follows: 1. High efficiency 2. Odorless 3. Grease-free 4. Does not stain. Is quick-drying (absence of feeling) 6. Does not stick '7. Lower cost than anhydrous systems 8. Works with all antiperspirant systems (ACH, Al / Zr, AlCl3 - 6H2O) 9. Dries to a powder (does not whiten under the arms). Can be used as a roll-on, can be sprayed from a pump spray, squeeze bottle or aerosol system 11. Is non-corrosive with respect to metal containers The antiperspirant compositions are generally prepared as follows: the hydrophobic oxide is dispersed in the oil phase with vigorous stirring. The active antiperspirant ingredients dissolve in the polar liquid phase. The polar phase is slowly added to the oily liquid / hydrophobic oxide phase with vigorous stirring. The invention is further illustrated by the following working examples. The chemical composition of the product names given in the examples is as follows: 13 459 318 REZAL 36G (35% Al / Zr / Gly): aluminum-zirconium-tetrachloro-hydrex-glycine complex. 2. Silicone 251 (SWS): D4: D5 polydimethylcyclosiloxanes 3. Silica R-972 (Degussa): coated silica prepared by flame hydrolysis. E.O. 308 (Wicken): aluminum sesquichlorohydrate. Fuel A-31: isobutane Example 1 Roll-on antiperspirant Ingredients Weight% Aluminum chlorohydrate (50% aqueous solution) 18.0 AlCl 3 ° 6H 2 O (50% aqueous solution) 6.0 REzAL 36G (36% Al / zr / Gly) 35.0 Silicone 251 (SWS) 40.0 Silica R-972 (Degussa) 1.0 100.0 The aluminum chlorohydrate solution, the AlCl3 '5H2O solution and the REZAL 36G solution are mixed together. Silica R-972 is dispersed in Silicone 251 with vigorous stirring. The active salt solution is then slowly added to the silicon / silica dispersion with vigorous stirring.

The resulting suspension is packaged in a roll-on container.

E.O. The 308 powder dissolves in water Exemgel 2 Pump spray and squeeze bottle antiperspirant Ingredients E.O. 308 (Wicken) H20 Glycine (SWS) Silica R-972. (Degussa) Silicone 251 Weight% .0 33.5 0.5 40.0 1.0 100.0 together with glycine. 459 318 14 Silica R-972 is dispersed in Silicone 251 with vigorous stirring.

The aqueous solution is added to the silicone / silica dispersion with vigorous stirring. The resulting suspension is then ready for packaging either in a squeeze spray bottle or pump spray container.

Example gel 3 Aerosol system antiperspirant Ingredients Weight% Composition according to example 2 65.0 Fuel A-31 35.0 100.0 65% of the composition according to example 2 is introduced into an aerosol steel can. An aerosol valve is crimped. 35% fuel A-31 is filled through the valve. The contents are shaken and an actuator is placed on the valve and the aerosol pack is ready for spraying.

Example gel 4 Aerosol tiger girant Ingredients yiktå Aluminum chlorohydrate 30.26 (50% aqueous solution) Aluminum chloride (50% aqueous solution) 6.72 Glycine 2.02 Silica R-972 0.98 Silicone 251 25.02 Fuel A-31 35.00 100.00 The aluminum chlorohydrate solution, the aluminum chloride solution and glycine are mixed together for clarity. Silica R-972 is dispersed in Silicone 251 with vigorous stirring. The aqueous phase is slowly added to the silicon / silica dispersion. The resulting suspension is ready for bottling on an aerosol can with the required amount of propellant and aerosol valve and actuating device.

Example 5 Aerosol Antiperspirant Component for AlCl 3 ~ 6H 2 O (50% aqueous solution) 29.44 Magnesium hydroxide 3.68 H 2 O - 5.88 Glycine 0.30 Silica R-972 0.90 Silicone 251 19.80 Fuel A-31 40, 00 100.00 The aluminum chloride solution, magnesium hydroxide, glycine and water are heated to 80 ° C and stirred until clear. Silica R-972 is dispersed in Silicone 251 with vigorous stirring. The cooled aqueous phase is slowly added to the silicon / silica dispersion with vigorous stirring. The resulting suspension is poured onto an aerosol can and fuel is supplied together with a suitable valve and actuating device.

Example 6 Encapsulated breath freshener Ingredients Weight% 1. Insoluble saccharin 0.10 2 Deionized water 49.60 3. Aerosil R-972 (Degussa) 1.00 4 Flavor, peppermint oil 0.30. Silicone P-251 49.00 '100.00 Preparation 1. Weigh components 1 and 2 and mix to dissolve; Components 3, 4 and 5 are weighed and mixed intimately; Mixtures 1 and 2 are combined by mixing with vigorous stirring for 5 minutes, after which the whole is bottled. 459 318 16 Example gel 7 Ingredient laxative Ingredients Weight% 1. Casanthronol (SB Penick) 0.50 2. Deionized water 49.50 3. Aerosil R-972 (Degussa) 1.00 4. Mineral oil 55/65 (Clearol) 49, 00 100.00 Preparation 1. Components 1 and 2 are weighed and mixed intimately; Components 3 and 4 are weighed and mixed intimately; . Mixtures 1 and 2 are slowly combined with good stirring for 10 minutes and the whole is then bottled.

Example gel 8 Inhaled antacid Ingredients Weight% 1. Calcium carbonate (Pfizer) 10.00 2. Deionized water 40.00 3. Aerosil R-972 (Degussa) 1.00 4. Peanut oil (Welch Home & Clark) 49.00 '100, Preparation 1. Components 1 and 2 are weighed and mixed intimately; Components 3 and 4 are weighed and mixed intimately; Mixtures 1 and 2 are combined with vigorous stirring for 10 minutes and the whole is then bottled.

Example gel 9 Encapsulated nasal gray Ingredients Weight% 1. Oximetazoline-HCl 0.10 2. Deionized water 49.40 459 318 17 3. Silicone P-251 (SWS Corp.) 50.00 4. Aerosil R-972 (Degussa) 0, 50 100.00 Preparation 1. Components 1 and 2 are weighed and mixed to dissolve; Components 3 and 4 are weighed and mixed intimately; Mixtures 1 and 2 are combined with vigorous stirring for 10 minutes and the whole is then bottled.

Example gel 10 Encapsulated anesthetic lotion Ingredients Weight% 1. Dyclonine-HCl (Games) 0.10 2. Deionized water 39.90 3. Aerosil R-972 (Degussa) 1.00 Isopropyl myristate 59.00 '100.00 Preparation 1. The components 1 and 2 are weighed and mixed to clarity; Components 3 and 4 are weighed and mixed intimately; Mixtures 1 and 2 are combined with vigorous stirring for 10 minutes and the whole is then bottled.

Example gel 11 Encapsulated hair care ingredient Ingredients Weight% 1. DL-panthenol (Hoffmann LaRoche) 0.50 2. Deionized water 49.50 3. Aerosil R-972 (Degussa) 1.00 4. Mineral oil 55/65 (Clearol) 49.00 100.00 1 "! 459 318 18 Preparation 1. Components 1 and 2 are weighed and mixed to clarity; Components 3 and 4 are weighed and mixed intimately; 3. Mixtures 1 and 2 are combined with vigorous stirring for 10 minutes and the whole is then dropped. in bottle.

Example gel 12 Encapsulated hair dye Ingredients Weight% 1. Lawasyn Orange RL '0.05 2. Irgalan Brown SR 0.03 3. Cibal Black BGL 0.02 4. Deionized water 50.00. Aerosil R-972 (Degussa) 1.00 6. Silicone P-251 (SWS Corp,) 48.90 100.00 Preparation 1. Components 1, 2, 3 and 4 are weighed and mixed intimately; Components 5 and 6 are weighed and mixed intimately; Mixtures 1 and 2 are combined with vigorous stirring for 10 minutes and the whole is bottled.

Example gel 13 Inked hand lotion Ingredients Weight% 1. Deionized water 30.00 2. Glycerol 29.00 3. Aerosil R-972 (Degussa) 1.00 4. Silicone P-251 (SWS Corp.) 20.00. Diisopropyl Adipate-Ceraphyl 20.00 230 (VAnDyk) 100 OO I 459 318 19 Preparation 1. Components 1 and 2 are weighed and mixed intimately; Components 3, 4 and 5 are weighed and mixed intimately; Mixtures 1 and 2 are slowly combined with vigorous stirring for 10 minutes and the whole is bottled.

Example gel 14 Encapsulated salad dressing Ingredients Weight% 1. Cider vinegar 49.0 2. Aerosil R-972 (Degussa) 1.0 3. Corn oil (Welch Home & Clark) 50.0 100.0 Corn oil and Aerosil are weighed and mixed intimately. Then add vinegar slowly while shaking vigorously. The whole thing is mixed for 10 minutes and bottled.

Claims (5)

459 318 YES TENT REQUIREMENTS Liquid composition containing an oily liquid suspension component having fine particles suspended therein of a polar liquid which is immiscible with the suspension component, characterized in that the fine particles are kept in suspension in the suspension component by the presence therein of an effective amount of fine particles of a hydrophobic metal oxide such as silica or a hydrophobic metalloid oxide, the polar liquid preferably constituting 5-80% by weight of the composition, the oily liquid suspending component preferably constituting 20-95% by weight of the composition and the the hydrophobic metal or metalloid oxide preferably constitutes 0.25-5.0 weight of the composition. 2. A composition according to claim 1, characterized in that the polar liquid preferably constitutes 30-60% by weight of the composition, the oily liquid suspending component preferably constitutes 30-65% by weight of the composition and the hydrophobic metal or metalloid oxide preferably 0.5-2% by weight of the composition. 3. In a composition according to claim 1 or 2, characterized in that the polar liquid is suitably a polar solvent system containing 0.1-40% by weight of an active ingredient such as a physiologically or pharmaceutically active material or a cosmetic or hygienic material or a food preparation, dissolved or suspended therein. Composition according to Claim 3, characterized in that 459 518 2! from the fact that the active material is an antiperspirant, deodorant, anesthetic, analgesic, antacid, antihistamine, decongestant, antitussive, laxative, sunscreen, aromatic, antibacterial agent, antifungal agent, salivary or hand-emitting agent, lotion, hair care product, hair coloring product, oral hygiene product or breath freshener. 5. A process for preparing the composition according to claim 1, characterized in that the hydrophobic oxide is suspended in the oily liquid suspending component with vigorous stirring, dissolving or suspending an active ingredient in the polar liquid and then adding the polar liquid, containing the active ingredient, to the oily liquid suspending component containing the hydrophobic oxide, with vigorous stirring, the polar liquid preferably constituting 5-80% by weight of the composition, the oily liquid suspending component preferably constituting 20-95% by weight of the composition and the hydrophobic oxide preferably constitute 0.25-5.0% by weight of the composition.