BG67102B1 - Method for protection of surfaces from adverse superimpositions and composition of the coating implementing the method - Google Patents

Abstract

The invention relates to a method and composition for protecting surfaces of various objects from unwanted superimpositions. The method involves preparation of the surface to be treated, laying a special coating on the surface which contains a modified hydrophobic nanodiamond and / or a modified hydrophobic nanodiamond charge and drying of the coating. The composition of the coating embodying the method includes (in %): acrylate resin from 30 to 55%; acrylic from 25 to 45%; dimethylpolysiloxane from 6 to 10%; a modified hydrophobic nanodiamond of 1 to 4%, or a modified hydrophobic nanodiamond charge of 2 to 8%; hardener from 0 to 8%; colorant from 0 to 4%. The advantages of the invention are the lack of special requirements and equipment for the application of the new method and its environmental friendliness and safety, the increased service life of the coatings, the lower cost of the protection achieved and the reduction of the coefficient of friction of the environment.

Description

Field of technology

The invention relates to a method and composition for protecting surfaces from unwanted overlays and finds application in the protection of various objects from adverse effects, including vessels, as well as in the production and application of special paints.

The invention can also be used in the protection of marine structures, bridge structures, buildings, monuments, solar panels and other objects exposed to atmospheric influences, overlays and other adverse effects and wherever it is necessary to achieve a low coefficient of friction of the protected object with environment.

BACKGROUND OF THE INVENTION

A method of protecting vessels from overlays is known, including:

1. Preparation of the treated surface by mechanical and / or chemical cleaning, including possible degreasing, followed by priming if necessary;

2. Applying in some of the known ways (with a brush, roller, spray, etc.), on the surface of the vessel in contact with water, a special coating (paint) with a thickness of at least 200 pm, with a composition that when glued during of exploitation of unwanted deposits on the surface (algae, crustaceans, etc.), impedes their development and reproduction, causing their biological destruction.

3. Drying the coating naturally.

There are no known methods for protection of surfaces from unwanted deposits, in which it can be achieved by applying a coating with a special composition containing modified hydrophobic nanodiamonds, in which the protected surface acquires a very low coefficient of friction with the environment, so conditions are created. for impossible attachment of unwanted overlays on it.

Coating compositions (paints) are known, implementing the known method, in which various additional ingredients (agents) with antifouling effect are used, containing organic-tin compounds, mainly tributyltin (TVT), and more modern ones - oxidized copper.

No antifouling paint compositions are known to contain a hydrophobicity-modified nanodiamond and / or nanodiamond charge.

The known method of protecting vessels from overlaps has the following main disadvantages:

- insufficiently long service life, which leads to the need for interruptions in the operation of vessels for new coating;

- low economic efficiency of the method due to its high cost due to large volumes of work on cleaning the surface of the old coating before applying a new coating, the cost of the coating itself and labor;

- when the polyps are torn off, the protective coating is torn off, after which the surface in this area remains unprotected;

- the sticking of crustaceans, algae, etc. is not prevented, resp. does not prevent the formation of colonies of polyps, which leads to an increase in the coefficient of friction between the vessel and the water and, accordingly, increases fuel consumption.

In addition to vessels, similar difficulties are encountered in the protection of surfaces and other objects for which overlays are an undesirable phenomenon.

With regard to the known coatings, the following more important problems are identified:

- high cost, with a short service life - from 1 to 2 years;

- even without accumulated deposits, the coatings do not provide a low coefficient of friction with the environment, in particular with water, which leads to high fuel consumption in vessels;

- non-ecological compositions containing components dangerous for life in the water, as well as for the people working with them;

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- most known, effective coatings do not comply with the requirements of Regulation (EC) № 782/2003 of the European Parliament and of the Council of 14 April 2003 on the prohibition of the use of organotin compounds on ships.

Technical essence of the invention

The object of the invention is to provide a method for protection of surfaces from unwanted overlays and a coating composition, realizing the method by which simultaneously with the prevention of overlays on the treated surface, to increase its service life without interruption for applying a new coating, to reduce the coefficient of friction with the environment, in which to achieve fuel savings (for vessels, cars, etc.), to increase the resistance to scratches and cracks, to ensure delayed aging from UV radiation and increase resistance to moisture, including salt moisture.

It is a further object of the invention to increase the physical strength of the coating by applying it not only to vessels but also to cultural monuments, buildings, solar panels, wind turbines, and wherever it is necessary to achieve low adhesion with respect to contaminants and / or low coefficient of friction, and the composition of the coating to allow coloring if necessary.

The set tasks are solved with a method for surface protection and a coating composition, realizing the method.

The new method created includes the following steps:

1. Preparation of the treated surface by mechanical and / or chemical cleaning, including possible degreasing, followed by priming if necessary.

2. One-time application on the treated surface, in some of the known ways (with a brush, roller, spray, etc.) of a special coating with a thickness of 40 to 200 pm, containing a modified hydrophobic nanodiamond and / or a modified hydrophobic nanodiamond charge .

3. Natural or accelerated drying of the coating, after which the surface acquires a much lower coefficient of friction with the environment and conditions are created for impossible fixing of unwanted deposits on it.

The composition of the coating implementing the method includes (in weight percentages):

- Acrylate resin - from 30 to 55%;

- Acrylic - from 25 to 45%;

- Dimethylpolysiloxane - from 6 to 10%;

- Modified hydrophobic nanodiamond - from 1 to 4% by weight, or modified hydrophobic nanodiamond charge - from 2 to 8%;

- Hardener - from 0 to 8%;

- Colorant - from 0 to 4%;

The advantages of the invention are the following:

- lack of special requirements and equipment for the application of the new method;

- environmental friendliness and safety when applying the method and using the coatings with the new composition;

- increased service life of the coatings without interruption for laying a new coating;

- lower cost of the achieved protection;

- reduction of the coefficient of friction of the coating with the environment, including as an independently sought effect;

- applicability to many different objects.

Examples of the invention

Numerous exemplary embodiments of the coating method and composition have been developed, without limiting it to those presented below.

Example 1.

A method for protection of surfaces from unwanted overlays has been developed, including the following steps:

1. Preparation of the treated surface by mechanical cleaning of the treated surface;

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2. Single application on the treated surface by means of rollers of a special coating with a thickness of 200 pm, in the composition of which a modified hydrophobic nanodiamond is contained;

3. Natural drying of the coating, after which the surface acquires a much lower coefficient of friction with the environment and conditions are created for impossible fixing of unwanted deposits on it.

Example 2.

A method for protection of surfaces from unwanted overlays has been developed, including the following stages:

1. Preparation of the treated surface by means of its dry cleaning, including degreasing;

2. One-time application on the treated surface, by means of a spray gun (spray) of a special coating with a thickness of 40 pm, in the composition of which a modified hydrophobic nanodiamond charge is contained;

3. Natural drying of the coating, after which the surface acquires a much lower coefficient of friction with the environment and conditions are created for impossible fixing of unwanted deposits on it.

Example 3.

A variant of the method for protection of surfaces from unwanted overlays has been created, including:

1. Preparation of the treated surface by mechanical and chemical cleaning, including degreasing, followed by priming with a primer suitable for acrylate-based coatings;

A single application to the treated surface by means of a 150 pm thick coating spray containing a hydrophobic nanodiamond or a hydrophobic nanodiamond charge according to the present invention, including the examples below;

3. Natural drying of the coating, before that a hardener is additionally inserted in its composition, whereby the surface acquires a much lower coefficient of friction with the environment and conditions are created for impossible fixing of unwanted overlays on it.

Example 4.

Methods similar to those of Examples 1 to 3 have also been developed, in which the thickness of the special coating is in the range of 40 to 200 pm, and the drying is carried out rapidly in some of the methods known in the art (increased convection of ambient air, blowing with warm air, etc.).

Example 5.

Specific compositions according to the invention comprising a modified hydrophobic nanodiamond or a modified hydrophobic nanodiamond charge are developed and are listed in Table 1.

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Table L

Components Composition 1 mg /% Composition! weight % Composition 3 wt. % Fold 4 wt. % CbCiiuj. 5 wt. % C < 6 > in 6% by weight Acrylic resin 50 46 41 50 52 38 Acrylic. 3Ω 411 41 32 39 37 Dtasgsh stlieiloksyan 8 7 9 8 6 10 Hydrophobic Iani.dnkmand νsizes from 4 to h d ιττ 2 5 4 0 0 (1 Hydrofoin nzng1L.iamatggg113 ΠΙΗΧΤ3 is dimensions στ] to 2 jB1 0 0 0 4 3 8 Hardener 8 0 5 6 0 7 With ι pest 2 4 0 0 0 0

In compositions 1 and 3 (with hydrophobic nanodiamond) and compositions 4 and 6 (with hydrophobic nanodiamond charge) the product "Crestacryl" was used as acrylate resin, and in compositions 2 (with hydrophobic nanodiamond) and 5 (with hydrophobic nanodiamond charge) Nuroflex ”.

An acrylate resin hardener is used as the hardener.

The compositions are prepared by adding the nanodiamond to the solvent (acrylic) in a suitable vessel, after which all the other components, without the hardener, are mixed together to obtain a homogeneous mixture. If necessary, add the hardener immediately before applying the coating, stirring for 5-6 minutes

Example 6.

From the compositions indicated in Example 5, three samples were made and the same were tested in the testing laboratory of the Ministry of Defense of the Republic of Bulgaria, according to an approved methodology for nanostructured coatings according to standard: MSLSTD810G. The tests were performed in full according to the standard and the results show that the tested coatings perform the set tasks, namely - prevent unwanted deposits and provide complete hydrophobicity; have crack and scratch resistance; temperature resistance in the range of 60-360 ° C; increase up to three times the aging period under UV radiation; have self-cleaning properties and resistance to salt moisture; term of continuous operation 8-12 years.

Application of the invention

The newly created method is applied with conventional methods of coating such as brushes, rollers, spray gun (spray) and others.

It is possible to add the hardener to the composition by means of a specialized painting gun, when applying the coating with it.

The composition of the coating allows it to be applied once, with a thickness of 40 to 200 pm, which ensures its service life for a long period of time - 8-12 years. In most cases

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Descriptions of issued patents for inventions № 07.2 / 31.07.2020 the application of a second new layer is not necessary.

When coloring the composition, it is recommended that the colorant have a particle size of 40 to 60 nm.

Compositions containing a hydrophobic nanodiamond charge have a black color, which is why it is not practical and cost-effective to color them.

The invention can find very wide application in various fields, such as protection of marine equipment (oil production platforms, ports, etc.), bridge structures, buildings, monuments, chemical installations, industrial vessels (silos, tanks, etc.). .), land and water transport (trains, trucks, cars; ships, yachts, etc.), mining facilities, oil and gas installations and pipelines, wind or solar power plants, furniture and others.

Claims (4)

Patent claims 1. A method of protecting surfaces from unwanted overlays, comprising: - preparation of the treated surface by means of its mechanical and / or chemical cleaning; - applying a special coating on the prepared surface in some of the known ways; - drying of the coating, characterized in that the application of a special coating on the prepared surface is carried out by applying a coating containing a modified hydrophobic nanodiamond and / or a modified hydrophobic nanodiamond charge. Method according to claim 1, characterized in that the special coating is applied once and has a thickness of 40 to 200 pm. Coating composition implementing the method according to claims 1 and 2, comprising acrylate resin and special additives, characterized in that it contains (in weight percentages): - acrylate resin from 30 to 55%; - acrylic from 25 to 45%; - special additives: - dimethylpolysiloxane from 6 to 10%; - modified hydrophobic nanodiamond from 1 to 4%, or modified hydrophobic nanodiamond charge from 2 to 8%. Coating composition according to Claim 3, characterized in that it also contains (in weight percent) a hardener from 0 to 8% and a colorant from 0 to 4%.