Method of manufacturing self-cleaning surfaces and article with such surface

FIELD: cleaning agents.

SUBSTANCE: manufacture of self-cleaning surfaces with bulges and deepenings, wherein bulges are spaced at 0.1 to 200 μm intervals and their heights range between 0.1 and 100 μm, is accomplished by applying and then drying solution, distillation, or emulsion containing hydrophobic material providing surface capable of self-cleaning upon evaporation of solvent, after which applied material is removed with detergents. Hydrophobic material is selected from wax and waxy substances such primary or secondary alcohols and alkanediols.

EFFECT: facilitated cleaning procedure.

7 cl, 4 ex

 

The object of the present invention is a method of manufacturing a self-cleaning surfaces, as well as the product with such a surface.

Cleaning surfaces of objects has the technical and economic importance, namely, in the optical and aesthetic reasons, partly for technical reasons, especially if we are talking about translucent surfaces, which are to preserve their function should from time to time be cleaned.

Repeatedly made attempts to create impervious to contamination and/or self-cleaning surfaces. This problem was tried to be solved manufacturers of polymer films and plates, creating a smooth surface and making these surfaces are either extremely hydrophobic, or extremely hydrophilic. Examples of this are the surface extremely hydrophobic Teflon or solely hydrophilic coating “no drop”, in which water and dirt can drain without forming droplets.

In the patent CH-PS 268258 described water-repellent surface having a water contact angle of more than 120°. They are obtained by applying to the substrate powders such as kaolin, talc, clay or silica gel, and powder first hydrophobized organic compounds of silicon. The application is made together with the cured resin, or from solutions with the content of inorganic fillers solvents. Durable hydrophobic coating so produced. Also there are no instructions on the grain size or grain size distribution of the powder. Properties of the thus obtained surfaces are compared with the surface of the leaves of the nasturtium. In this comparison it is necessary to pay attention to the fact that this is not known and technically not studied the origin of the surface properties of the leaves of the nasturtium. Held now research has shown that the nasturtium has an exceptionally fine ultrastructure with structural elements, less than 2 microns.

In the patent US-P-3354022 described water-repellent surface with protrusions and recesses and the air content of not less than 60%, and the contact angle of the surface is more than 90°.

In the patent DE-PS-1023217 described form for the manufacture of shaped elements with a rough surface. The form should serve for the manufacture of shaped parts made of rubber or plastic with a rough surface. This wall forms covered with coarse corundum powder and hot drying varnish. Forms produce products with special grooves and consequently improved adhesive properties. Not used even a normal layer vulcanization. Thus obtained surface, for example, is well marked. These products are certainly not self-clean flowing water.

In JP-A-62-191447 described is the procedure of improving water-repellent properties of the surface. This is applied plasmolemma film, then etching it is rough, then apply the second plasmolemma film.

In the patent JP-A-3-174279 (abstract) describes a method of manufacturing a decorative matte surface on sheets or films. They are produced using lacquer that cures ionizing rays, thus it is not specified how they applied some unspecified figure. Then they completely otverzhdajutsja further irradiation.

Detailed studies of the applicant have led him to an unexpected result, namely, that it is technically possible to make the surface of the object artificially self-cleaning, if they are to provide artificially surface structure with protrusions and recesses. It should be borne in mind that the distance between the projections of the surface structure are in the range from 0.1 to 200 μm, preferably from 0.1 to 100 μm, and the height of the protrusions is in the range from 0.1 to 100 μm, preferably from 0.1 to 50 μm, and also have in mind that these projections consist of hydrophobic polymers or persistent gidrofobizirovannykh materials, and also bear in mind that the tabs are not removed by water or water with detergent powder (cf. WO 96/04123).

The present invention is to provide a method for manufacturing smoochywoochypoochy, which removes detergents.

The task in the method of manufacturing a self-cleaning surfaces having protrusions and depressions, the distance between the protrusions is in the range from 0.1 to 200 μm and the height of the protrusions is in the range from 0.1 to 100 μm, according to the invention is solved by the fact that when this is applied and then dried solution, dispersion or emulsion containing a hydrophobic material, the surface of which acquires the ability to cleanse itself by evaporation of the solvent, and the deposited material is removed with detergents and hydrophobic material is a wax or waxy substance, such as primary or secondary alcohols and arcangioli, β-diketones, secondary ketones and long-chain alkanes.

The solution, dispersion or emulsion contains solid particles. The application of the solution, dispersion or emulsion is performed by sputtering.

Application carried out using canned spray or spray gun.

The hydrophobic material is also oil resistant. The task according to the invention is also solved by the fact that we offer the product, the surface of which has projections and depressions, the distance between the protrusions is in the range of 0.1 to 200 μm and the height of the protrusions is in the range from 0.1 to 100 μm, and at least a hydrophobic protrusions, the protrusions consist of a solid is ASTIC and the surface is covered with a hydrophobic material according to the invention.

To solve this task according to the invention is used nonacosane 10-Ola, nonacosane-7,10-diol, nonacosane-5,10-diol, hentriacontane-12,14-dione, hentriacontane-8,10-dione or Palitana as a hydrophobic material for producing self-cleaning surfaces.

Removes detergents” means under the influence of water detergents - at least with long-term exposure - printed material as a result of dissolution of at least parts of deposited material is removed. Such applied in accordance with the invention materials are also removed by mechanical means such as brushes, scrapers or cleaning with water under high pressure. As detergents use anionic, cationic or non-ionic detergents, such as the sulfates of fatty alcohols, such as sodium dodecyl sulphate.

In one form of execution of the hydrophobic material is presented in the form of wax, which is due to self-organization forms a microstructured smoochiez surface.

In another embodiment, a solution, dispersion or emulsion containing solid particles. They, in turn, can be hydrophobic or hydrophilic, if used in conjunction with hydrophobic materials such as waxes.

The application of hydrophobic materials can be performed by sputtering, for example the settlement of what edstam canned spray or spray gun. Depending on the proposed use of the hydrophobic material preferably may additionally be oil resistant.

It is also possible through sopranos water hydrophobic material to migrate through the permeable surface.

As the hydrophobic material in the method according to the invention can be used, in particular, long-chain secondary alcohols and arcangioli, β-diketones, secondary alcohols, long-chain alkanes. Particularly suitable nonacosane-10-ol, nonacosane-7,10-diol, nonacosane-5,10-diol, hentriacontane-12,14-dione, hentriacontane-8,10-dione, palmitin and other hydrophobic substances, soluble in volatile solvents and evaporation, the last form by self-organization of hydrophobic water-repellent surface.

Technically are particularly important self-cleaning surfaces of objects that are translucent and must maintain this level for a long time on optical, aesthetic and technical reasons. In particular, we are talking about translucent glazing of buildings, vehicles, solar collectors etc Udaljenost hydrophobic material is of particular advantage if the self-cleaning properties are needed only temporarily, for example during storage or transport, and in the other situation is listach, for example, for aesthetic reasons, undesirable.

Economic and technical importance is the production of self-cleaning surfaces for facades, roofs, monuments and tents, as well as for internal coatings, grain silos, tanks or pipes, which either contain aqueous solutions, or can easily and without sediment to clean flowing water. Of interest also is the outer coating of vehicles, cars, trains or airplanes.

Optimal results are achieved when the protrusions of the surface structures are quite close to each other, thus avoiding contact through droplets of water located between the projections of the recess. If the projections of the surface structures are too close from each other or recesses are not deep enough, they again act as a solid surface and can thereby better wetted. Therefore, you should try to ensure that when increasing the distance between the projections have also increased the height of the protrusions from the base. Conducted to date, measurements have shown that in the claimed bounds for the distance and height of the protrusions achieved good results. Optimal results provide the surface with protrusions from 0.1 to 50 μm and the distance between the projections from 0.1 to 100 microns.

Izopet the tion is illustrated by the following examples.

Example 1.

Hentriacontane-14,16-dione as 0.1%solution in hexane or ethyl acetate is sprayed using canned spray or spray gun on any surface. During evaporation of the solvent hentriacontane-14,16-dione forms by self-organization crystals in the form of small tubes, most of which have a diameter of 0.2 μm and a length of from 0.5 to 5 μm. Thanks to this coating wetted surface becomes hydrophobic and the contact angle is increased to 160°. With this kind of surface debris washed down flowing water, with time itself is also removed coating. To increase the roughness of the coating solution may be added or hydrophilic (e.g., silica flour), or hydrophobic powder (e.g., Teflon).

Example 2.

Conventional gypsum mixed in the ratio of 1:10:2 (weight percent) of water and siliconates (Wacker BS 15) and then applied by brush or roller. When drying is formed mikroheranhvatho surface, the structure of which is formed by needle-like crystals of gypsum. After evaporation of the water they are coated with a layer hydropiperoides funds. The contact angle on the surface exceeds 150°.

Example 3.

Conventional gypsum mixed in the ratio of 1:10:0,5 (weight percent) of water and siliconates (Wacker silicone W1), such as methylsilanol potassium, and cause for the eating of the spray gun. When drying is formed mikroheranhvatho surface structure which defines a needle-like crystals of gypsum. After evaporation of the water they are coated with a layer hydropiperoides funds. The contact angle of such a surface is more than 150°.

Example 4.

Iodopropane polymer (e.g. polyurethane) cover with one hand waxy substance (for example, hentriacontane-14,16-dione), which has an ability to structure formation. (see example 1). When the water diffusion through the polymer wax superheroics and forms on the surface of the desired microstructure.

With a sufficiently large amount of wax this system allows a certain degree prolong in the sense that damaged or corroded structures can be reproduced at a specific time.

1. A method of manufacturing a self-cleaning surfaces having protrusions and depressions, the distance between the protrusions is in the range from 0.1 to 200 μm and the height of the protrusions is in the range from 0.1 to 100 μm, when this is applied and then dried solution, dispersion or emulsion containing a hydrophobic material, the surface of which acquires the ability to cleanse itself by evaporation of the solvent, and the deposited material is removed with detergents and hydrophobic material is a wax or waxy ve is esta, such as primary or secondary alcohols and arcangioli, β-diketones, secondary alcohols and long-chain alkanes.

2. The method according to claim 1, characterized in that the solution, dispersion or emulsion contains solid particles.

3. The method according to claim 1 or 2, characterized in that the coating solution, dispersion or emulsion is performed by sputtering.

4. The method according to claim 3, characterized in that the application perform using canned spray or spray gun.

5. The method according to one of claims 1 to 4, characterized in that the hydrophobic material is also oil resistant.

6. Product, the surface of which has projections and depressions, the distance between the protrusions is in the range of 0.1 to 200 μm and the height of the protrusions is in the range from 0.1 to 100 μm, and at least a hydrophobic protrusions and consist of solid particles and the surface is covered with a hydrophobic material according to claims 1-5.

7. Application nonacosane 10-Ola, nonacosane-7,10-diol, nonacosane-5,10-diol, hentriacontane-12,14-dione, hentriacontane-8,10-dione or Palitana as hydrophobic material for producing self-cleaning surfaces.



 

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FIELD: cleaning agents.

SUBSTANCE: manufacture of self-cleaning surfaces with bulges and deepenings, wherein bulges are spaced at 0.1 to 200 μm intervals and their heights range between 0.1 and 100 μm, is accomplished by applying and then drying solution, distillation, or emulsion containing hydrophobic material providing surface capable of self-cleaning upon evaporation of solvent, after which applied material is removed with detergents. Hydrophobic material is selected from wax and waxy substances such primary or secondary alcohols and alkanediols.

EFFECT: facilitated cleaning procedure.

7 cl, 4 ex

FIELD: polymer materials.

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EFFECT: facilitated restoration of polymer coatings.

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FIELD: application of coat on surfaces of articles made from polymer scintillation materials.

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FIELD: inorganic chemistry.

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15 cl, 4 tbl, 2 ex

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