RU150236U1 - DEVICE FOR CONTACTLESS APPLICATION OF A HYDROPHOBIZING PROTECTIVE COMPOSITION ON A SOLID SURFACE - Google Patents

Abstract

1. A device for the non-contact deposition of a hydrophobic protective composition on hard surfaces, characterized in that it contains a metal container made with a neck and designed to work with excessive internal pressure, a mechanical pressure valve is installed in the neck of the metal container, to which it is mechanically attached to the outside a spray nozzle, a hydrophobizing composition for spraying, consisting of a liquid phase containing a solution, is placed in the indicated metal container at least one active component of the hydrophobizing coating and at least one propellant gas, and the propellant gas present in the vessel creates a working pressure inside the vessel of 2-12 atm, while the content of the propellant gas in the vessel creates at the outlet of the spray nozzles with an outlet diameter of 1.8-0.3 mm the linear flow rate of the hydrophobizing composition is more than 20 cm / s with a volume flow of the hydrophobizing composition of more than 0.5 cm / s, with the possibility of uniform application water repellent composition on the treated surface. 2. The device according to claim 1, characterized in that the water-repellent composition contains organofluorine polymers and / or mixtures thereof. The device according to claim 1, characterized in that the water-repellent composition contains polyurethanes and / or polyureas and / or mixtures thereof. The device according to claim 1, characterized in that the water-repellent composition contains alkyd and / or acrylic polymers and / or mixtures thereof. The device according to claim 1, characterized in that the water-repellent composition contains organoelement polymers and / or them with

Description

The technical solution relates to the field of organic chemistry, namely, to the field of protective agents for various buildings and structures and can be widely used in the application of protective hydrophobic coatings in various fields of technology, construction, as well as in everyday life, especially in private low-rise households.

One of the problems in the operation of buildings (brick, reinforced concrete, lined with stone, plastered, wooden), as well as structures (metal fences, wooden, concrete and reinforced concrete, metal structures of wide use, infrastructure elements), elements of summer cottages is the longevity of operation. In the mid-climate zone, without exception, all materials are exposed to atmospheric moisture, followed by corrosion and, over time, lose their aesthetic appearance or are destroyed. For brick, cement plaster, cement products and facing materials, a very negative factor is the freezing of the moisture-absorbing surface during the daily temperature fluctuation from the positive to the negative region and vice versa. Frequent change of such cycles leads to complete destruction of the surface (the front surface of the brick crumbles, the plaster cracks, the cement and facing products begin to crumble). Metal products (even painted or made of non-ferrous metals or alloys) gradually corrode.

To solve this problem, it is proposed to apply protective coatings, including hydrophobic ones. Currently, hydrophobic protective coatings on a hard surface are applied using a brush, roller or spray gun. However, in any of the options, the ordinary consumer has serious problems, because of which such structures are practically not applied by construction and repair organizations, or by private individuals.

In particular, how can the brickwork of the house be processed? When using a brush or roller streaks form, and the composition will lie unevenly. To use the spray gun, it is necessary to use a compressor, and when using a manual spray gun, low productivity, and appropriate solvents are needed to wash the spray gun after work. The same problems will be with smaller products. In addition, a person must have certain skills.

Known (US Patent 5110684, publ. 1992) is a method of hydrophobizing a surface by applying, using a roller or spray gun, aqueous solutions of alkoxysilanes with various additives.

The disadvantage of this method should be recognized uneven application, unreasonably high consumption of material due to uneven application. In addition, such a coating for a considerable time when interacting with the surface material releases undesirable volatile organic compounds.

It is known (DE, patent 3911479, publ. 1990) also the use of organic solvent-free emulsions based on hydrolyzable and condensable alkoxyfunctional silicone resins for impregnation of porous building materials and surface treatment of dense materials. The emulsion is applied using a brush, roller or dipping.

The disadvantage of the technical solution should recognize the uneven application, as well as excessive consumption of material.

Also known (RU, patent 2357003, publ. 2009) is a method of coating a metal surface by dipping in a bath, comprising contacting an aqueous composition for pretreating a metal surface before coating or treating a metal surface with a clean, pickled, cleaned and / or pre treated metal surface with the formation on the metal surface of the film, which is dried and optionally further cured, while the layer is dried and cured the film has a thickness ranging from 0.001 to 10 μm, and the aqueous composition contains at least one hydrolyzable, at least partially fluorine-free silane, at least one at least partially hydrolyzed, containing fluorine silane, and, at least one metal chelate compound and / or at least one organic film former, which is an oligomer, polymer and / or copolymer.

The disadvantage of this method is to recognize the heterogeneity of the resulting coating, as well as the unreasonable cost overrun of the used water repellent composition.

The closest analogue of the developed technical solution can be recognized (RU, patent 2378302 2010) aerosol method of applying a hydrophobic organosilicon composition, consisting of two components:

A is oligoorganoalkoxy titanosiloxane of the general formula [RSi (OR ¹ ) _3-a O _{a / 2} ] _n [Ti (OC ₄ H ₉ ) _4-b O _{b / 2} ] _m , where R is C ₁ -C ₈ alkyl or phenyl; R ¹ is alkyl C ₁ -C ₃ ; a, b = 1-3, n = 5-50, m = 1-10,

and B is an organotrialkoxysilane of the general formula RSi (OR ¹ ) ₃ ,

where R and R ₁ have the above meanings when mass

the ratio of A: B = 1: (1-10).

The aerosol method of applying the composition involves (http://www.fizioterapiya.info/?page_id=95) using a device containing at least a metal container made with a neck and designed to work with excessive internal pressure in the neck of a metal container a mechanical pressure valve, to which a spray nozzle is mechanically connected from the outside, a spray composition and at least one propellant gas are placed in said metal container. Since in this case the hydrophobizing composition and its solvent are subjected to aerosol spraying, it is they that are placed in a metal container.

A disadvantage of the known technical solution should be recognized as a rather narrow scope while at the same time low quality of surface protection.

The technical problem, solved by means of the developed device, is to expand the range of means of protection of materials.

The technical result achieved by the implementation of the developed device is to improve the quality of surface protection by hydrophobization while expanding the scope.

To achieve the specified technical result, it is proposed to use the developed device. The developed device for the non-contact deposition of a hydrophobic protective composition on hard surfaces contains a metal container made with a neck and designed to work with excessive internal pressure, a push-pull mechanical valve is installed in the neck of the metal container, to which the spray nozzle is mechanically attached to the outside, into the specified metal container a water-repellent spraying composition is placed, consisting of a liquid phase containing a solution of at least , one active component of a water-repellent coating and at least one propellant gas. The propellant gas inside the tank creates a working overpressure value of 2-12 atm inside the tank, while the content of the propellant gas in the tank creates at the outlet of the spray nozzle with an outlet diameter from 0.3 to 1.8 mm a linear flow rate of water repellent a composition of more than 20 cm / s with a volumetric flow rate of a hydrophobizing composition of more than 0.5 cm ³ / s, with the possibility of uniformly applying a hydrophobizing composition to the treated surface.

The expansion of the field used hydrophobic compounds allows you to expand the scope of the device. The experimentally established parameters of the propellant gas made it possible to achieve maximum uniformity of the gyrofobizating stream obtained at the outlet of the torch nozzle, which led to the application of a hydrophobizing coating in an even layer that provides reliable protection of the surface on which the composition is applied. An increase or decrease in the diameter of the nozzle outlet from the indicated value results in an inhomogeneous coating with a hydrophobic composition. Similarly, an increase or decrease in the propellant gas in the tank does not allow to obtain a high-quality coating.

According to the requirements of 9.7.4.3 (2) of the Regulation, the following features of the device are used to characterize the utility model: the presence of a structural element, the presence of communication between the elements, the relative position of the elements, the form of the element or device as a whole, the form of communication between the elements, parameters and other characteristics element and their relationship, the material from which the element or device as a whole, the environment that performs the function of the element.

Analysis of the independent claim of the utility model formula shows that the following types of features were used to characterize the developed device:

- a metal container made with a neck and designed to work with excessive internal pressure;

- a mechanical pressure valve is installed in the neck of the metal container, to which the spray nozzle is mechanically connected from the outside;

- a hydrophobizing spray composition consisting of a liquid phase containing a solution of at least one active component of the hydrophobizing coating is placed in said metal container;

- at least one propellant gas;

- the propellant gas located in the tank creates inside the tank the magnitude of the working overpressure within 2-12 atm .;

- the content of the propellant gas in the container creates at the outlet of the spray nozzle with an outlet diameter of 0.3-1.8 mm a linear flow rate of the hydrophobizing composition of more than 20 cm / s with a volume flow of the hydrophobizing composition of more than 0.5 cm ³ / s, with the possibility uniform application of water repellent composition to the treated surface.

It should be noted that only a combination of these features allows to achieve the previously indicated technical result - improving the quality of surface protection by hydrophobization while expanding the scope.

Depending on the application of the device, the water-repellent composition used may contain organofluorine polymers and / or mixtures thereof, polyurethanes and / or polyureas and / or mixtures thereof, alkyd and / or acrylic polymers and / or mixtures thereof, as well as organoelement polymers and / or mixtures thereof.

As a solvent, depending on the active component used, halogenated, aromatic, liquid saturated or unsaturated hydrocarbons, esters, ketones or alcohols, as well as mixtures or water thereof, can be used.

As a propellant gas, the device may contain liquid and / or compressed gases.

The essence and advantages of the developed technical solution will be further disclosed using implementation examples.

The following materials were taken as samples for applying hydrophobizing compositions:

- brick facing yellow

- facing brick red

- white cement paving slabs, vibrocasting (size 20 × 10 × 5 cm)

- concrete block (fragments approximately 25 × 12 × 10 cm in size)

- ceramic floor tiles for outdoor use (size 25 × 15 cm)

- ceramic basement tile (artificial stone, size 25 × 15 × 2 cm)

- basement natural stone sandstone (size about 20 × 12 × 2 cm)

- euro-lining polished unpainted, pine (size 20 × 10 × 1)

- unpainted steel pipe (Ф76 mm, length - 25 cm)

Special cleaning of material samples was not carried out, but only with a soft brush dust was removed from the test surfaces.

The test surfaces of the samples were:

- for bricks - long lateral plane

- for paving slabs - the upper plane

- for concrete blocks - an even smooth side of the sample measuring 25 × 12 cm

- ceramic tiles - exterior decorative surface

- basement tile - exterior decorative surface

- natural stone - one of the flat surfaces

- euro lining - polished surface

- steel pipe - entire outer surface

For experiments, we used a plastic bath measuring 40 × 30 × 15 cm and supports in the form of metal corners 45 × 45 mm with a length of 20 cm. Weighing was carried out with an accuracy of 0.01 g.

Preliminary preparation of the samples was as follows. On each sample (with the exception of the steel pipe), the side surfaces adjacent to the working surface were subjected to continuous treatment with silicone sealant so that when the working surface of the sample was immersed in water, water absorption occurred only through the working surface. After treatment with sealant, the samples were kept at room conditions for a day.

Water-repellent compositions were applied to the surface of the samples from aerosol cans that fully comply with the conditions given in the independent claim of the utility model formula, uniformly moving the spray torch along the working surface so that the torch passes the surface for 3-4 seconds. With a two-layer coating, inter-layer drying was 10 minutes. The treatment was carried out 30 minutes before the sample was immersed in water.

Before immersion in water, the sample was weighed. Then the sample was mounted on supports with the working surface down and water was poured to a level 3-4 mm above the level of the working surface. The sample was kept in this position for 8 hours. After that, the sample was taken out, the working surface was wiped with a dry cloth, kept for 30 minutes and weighed. The specific moisture absorption was calculated as the quotient of dividing the amount of absorbed moisture by the area of the working surface of the sample.

The metal pipe was simply immersed in water and the surface properties were visually evaluated.

The results are expressed in the form of tables No. 1-5.

Tab. one. EXAMPLE 1 The specific moisture permeability of the surface under experimental conditions, g water / cm ² MATERIAL Balloon contents In wt.% Of the total contents of the cylinder Before processing after the 1st treatment after the 2nd treatment Active component of water repellent coating 0.30 0,03 0.005 Brick facing yellow Polymethylphenylsiloxane Resin 45 0.32 0.02 0.006 Brick facing red The solvent is a mixture of methylene chloride: toluene = 1: 1 twenty 0.16 0,03 0.006 White cement paving slabs, vibrocasting Propellant 0.12 0.05 0.009 Concrete parapet (fragment) propane-butane mixture 35 0.08 0.009 0.003 Ceramic tile for outdoor use Pressure in a cylinder, atm. 6 0.11 0.05 0.007 Artificial stone basement tile

The diameter of the outlet nozzles, mm 0.5 0.20 0.04 0.008 Ground sandstone tile Linear flow rate, cm / s 211 0.01 0.005 0.001 Eurolining polished, pine (fragment) Volumetric flow, cubic cm / s 0.9 the surface is completely wetted the surface is not visually wetted the surface is not visually wetted Pipe steel unpainted F76 mm Tab. 2. EXAMPLE 2 The specific moisture permeability of the surface under experimental conditions, g water / cm ² MATERIAL Balloon contents In wt.% Of the total contents of the cylinder Before processing after the 1st treatment after the 2nd treatment Active component of water repellent coating 0.30 0.04 0.006 Brick facing yellow Polydimethylsiloxane 74 0.32 0,03 0.007 Brick facing red Solvent - Isopropyl Alcohol 25 0.16 0.04 0.006 White cement paving slabs, vibrocasting Propellant 0.12 0.05 0.010 Concrete parapet (fragment) compressed air one 0.08 0.010 0.008 Ceramic tile for outdoor use Pressure in a cylinder, atm. 8 0.11 0.06 0.008 Artificial stone basement tile The diameter of the outlet nozzles, mm 0.4 0.20 0.06 0.009 Ground sandstone tile Linear flow rate, cm / s 240 0.01 0.005 0.001 Eurolining polished, pine (fragment)

Volumetric flow, cubic cm / s 1,1 the surface is completely wetted the surface is not visually wetted the surface is not visually wetted Pipe steel unpainted F76 mm Tab. 3 EXAMPLE 3 The specific moisture permeability of the surface under experimental conditions, g water / cm ² MATERIAL Balloon contents In weight,% of the total contents of the cylinder before processing after the 1st treatment after the 2nd treatment Active component of water repellent coating 0.30 0.05 0.006 Brick facing yellow Ftoroplast F-32L 22 0.32 0.04 0.007 Brick facing red Solvent - Freon 113 (trifluorotrichloroethane) 76 0.16 0.06 0.008 White cement paving slabs, vibrocasting Propellant 0.12 0.05 0.010 Concrete parapet (fragment) compressed nitrogen 2 0.08 0.010 0.008 Ceramic tile for outdoor use Pressure in a cylinder, atm. 10 0.11 0.08 0.010 Artificial stone basement tile The diameter of the outlet nozzles, mm 0.3 0.20 0,07 0.009 Ground sandstone tile Linear flow rate, cm / s 185 0.01 0.005 0.001 Eurolining polished, pine (fragment) Volumetric flow, cubic cm / s 0.7 the surface is completely wetted the surface is not visually wetted the surface is not visually wetted Pipe steel unpainted F76 mm

Tab. four. EXAMPLE 4 The specific moisture permeability of the surface under experimental conditions, g water / cm2 MATERIAL Balloon contents In wt.% Of the total contents of the cylinder before processing after the 1st treatment after the 2nd treatment Active component of water repellent coating 0.30 0,03 0.005 Brick facing yellow Polyurethane SKU-PFL-100 four 0.32 0.02 0.006 Brick facing red Solvent - Nefras C2 80/120 65 0.16 0.04 0.006 White cement paving slabs, vibrocasting Propellant 0.12 0.04 0.008 Concrete parapet (fragment) mixture of freons R21 and R22 31 0.08 0.009 0.004 Ceramic tile for outdoor use Pressure in a cylinder, atm. 3 0.11 0.05 0.007 Artificial stone basement tile The diameter of the outlet nozzles, mm 1.4 0.20 0.04 0.006 Ground sandstone tile Linear flow rate, cm / s 140 0.01 0.005 0.001 Eurolining polished, pine (fragment) Volumetric flow, cubic cm / s 1,5 the surface is completely wetted I do not visually wet the surface the surface is not visually wetted Pipe steel unpainted F76 mm Tab. 5. EXAMPLE 5 The specific moisture permeability of the surface under experimental conditions, g water / cm2 MATERIAL Balloon contents In wt.% Of the total contents of the cylinder Before processing after the 1st treatment after the 2nd treatment

Active component of water repellent coating 0.30 0.04 0.006 Brick facing yellow Acrylic copolymer 19 0.32 0,03 0.006 Brick facing red The solvent is a mixture of xylene (50 h), butyl acetate (15 h), acetone (15 h), ethyl cellosolve (20 h) 54 0.16 0.04 0.005 White cement paving slabs, vibrocasting Propellant 0.12 0.06 0.009 Concrete parapet (fragment) dimethyl ether 27 0.08 0.009 0.004 Ceramic tile for outdoor use Pressure in a cylinder, atm. 7 0.11 0.05 0.007 Artificial stone basement tile The diameter of the outlet nozzles, mm 0.8 0.20 0.04 0.006 Ground sandstone tile Linear flow rate, cm / s 257 0.01 0.005 0.001 Eurolining polished, pine (fragment) Volumetric flow, cubic cm / s 1,2 the surface is completely wetted I do not visually wet the surface I do not visually wet the surface Pipe steel unpainted F76 mm

The specific moisture permeability of the surface of samples processed according to the technical solution - the closest analogue averaged 0.4-0.6

Claims (7)

1. A device for the non-contact deposition of a hydrophobic protective composition on hard surfaces, characterized in that it contains a metal container made with a neck and designed to work with excessive internal pressure, a mechanical pressure valve is installed in the neck of the metal container, to which it is mechanically attached to the outside a spray nozzle, a hydrophobizing composition for spraying, consisting of a liquid phase containing a solution, is placed in the indicated metal container at least one active component of the hydrophobizing coating and at least one propellant gas, and the propellant gas present in the vessel creates a working pressure inside the vessel of 2-12 atm, while the content of the propellant gas in the vessel creates at the outlet of the spray nozzle orifice diameter 1,8-0,3 mm linear flow rate hydrophobicizing composition of more than 20 cm / s at a flow rate hydrophobicizing composition greater than 0.5 cm ³ / s, with the possibility to apply evenly Nia hydrophobic composition on the surface to be treated. 2. The device according to claim 1, characterized in that the water-repellent composition contains organofluorine polymers and / or mixtures thereof. 3. The device according to claim 1, characterized in that the water-repellent composition contains polyurethanes and / or polycarbamides and / or mixtures thereof. 4. The device according to claim 1, characterized in that the hydrophobic composition contains alkyd and / or acrylic polymers and / or mixtures thereof. 5. The device according to claim 1, characterized in that the hydrophobizing composition contains organoelement polymers and / or mixtures thereof. 6. The device according to claim 1, characterized in that the solvent used is halogenated, aromatic, liquid saturated or unsaturated hydrocarbons, esters, ketones or alcohols, as well as mixtures thereof or water. 7. The device according to claim 1, characterized in that as a propellant gas it contains liquid and / or compressed gases.