Varieties of organosilicate compositions, features and method of application

Organosilicate materials are enamels with enhanced anti-corrosion properties. The composition of these materials contains silicates, which allow the creation of an ultra-resistant elastic coating. The group of organosilicate compositions is one of the most attractive for the consumer. The formulations give a long-lasting finish and also have a diverse palette of shades.

Organosilicate compositions - technical characteristics

Organosilicate compositions first appeared on the paint and varnish market in the second half of the 1960s. They were created at the Institute of Chemistry and Silicates and tested by the institution's leading specialists.

Organosilicates are conventionally classified according to the type of destination:

• Waterproof. These are coatings that have increased resistance to atmospheric influences.They are not exposed to the sun, do not crack at subzero temperatures, and also have resistance to the action of the gaseous medium. The heat resistance of such coatings increases to +300 or +400 degrees, they are widely used for decorative finishing of building facades.
• Special. Compositions showing additional qualities. They are resistant to thermal effects, are not exposed to radiation, therefore they are used for painting the premises of nuclear power plants.
• Oil resistant. This group contains only 2 compositions that are used for painting metal structures made of concrete or reinforced concrete. Oil and gasoline resistant paints cover surfaces exposed to petroleum products or oils.
• Chemical resistant. Paints with high chemical resistance. Moreover, they have high anti-corrosion and heat-resistant qualities.
• Heat resistant. These are materials intended for painting metal structures that can withstand high temperatures. They are used to paint metal structures in factories where materials are melted.
• Electrical insulation. Compositions intended for painting electrical appliances, wires, various parts. The production of electrically insulating organosilicate compositions is limited, since it is gradually being replaced by the production of organosilicon and electrically insulating varnishes.

Organosilicate compositions are produced on special equipment using generally accepted quality standards.

Composition and properties

The composition of the organosilicate composition may vary depending on the type of application, but the base remains unchanged:

• silicates (silicone polymers are most often used as silicones);
• layered hydrosilicones (designed to create structure);
• oxidizing agents (transition metal oxides are most often used as oxidizing agents).

As a result of the interaction of the elements of the composition, a polymer composite layer with a certain set of properties is formed on the painted surface:

• high resistance to chemical attack;
• lack of exhaustion indicators in the sun;
• water-repellent quality;
• resistance to biological influences.

Organosilicate compositions exhibit high adhesion rates. The average lifespan is 10 to 15 years.

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Scope

Organosilicate paints are used to protect various surfaces, mechanisms or devices. They can be used as dielectric or insulating materials.

Advantages and disadvantages of enamel

Organosilicate paints have advantages and disadvantages.

Benefits:

• high quality resistor;
• the ability to work at any temperature;
• long life expectancy.

Disadvantages:

• limited color range;
• features when working with formulations.

Reference! If during work the conditions of application are not observed or the conditions of operation are violated, the service life is reduced to 5 years.

At what temperatures and humidity is it recommended to use

Organosilicates are purchased for painting gas boilers or autoclaves, as they well protect heating equipment from corrosion and external influences. Materials are applied to any surface at temperatures from -20 to +35 degrees.

Drying time

At an air temperature of +20 degrees, organosilicate paints dry in 3-4 hours at 3 degrees. The adhesion to the surface of the compositions requested varies from 1 to 2 points.

Coating durability

The organosilicate coating withstands increased shock loads. Impact resistance is one of the most important characteristics of a finish. As a result of the studies carried out, the impact resistance index of organosilicates was estimated to be above average.

Varieties of paints and scope

There are several varieties of organosilicate paints on the paints and varnishes market, which have a number of differences. Materials are produced in accordance with generally accepted standards, supplied both retail and wholesale.

OS-12-03

This is a paint designed for industrial work.

Benefits:

• dense finishing structure;
• high weather resistance;
• operation at temperatures from -50 to +150 degrees;
• lack of exhaustion indicators in the sun;
• ease of work;
• the presence of various shades;
• the possibility of choosing from the catalog.

Disadvantages:

• only forms a matte finish;
• long drying time - more than 72 hours.

OS-51-03

It is an anti-corrosion composition characterized as resistant to radiation and heat. Benefits:

• withstands high temperatures (up to +300 degrees);
• applied without primer;
• dries in 2 hours;
• has a high tensile strength;
• exhibits high viscosity qualities.

Disadvantages:

• adhesion by type of coating is less than 1 point;
• red, blue, yellow colors and their shades are operated at a temperature not higher than +200 degrees;
• other colors can be used at temperatures above +300 degrees.

OS-74-01

The heat resistant enamel is available in 9 shades. Benefits:

• the elasticity of the coating is 3 mm;
• the adhesion of the coating is 1 point;
• the drying time of the layer is 2 hours;
• high indicators of weather resistance and impact resistance.

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Disadvantages:

• cannot be applied indoors.

OS-52-20

Organosilicate paint is intended for painting metal, reinforced concrete and concrete structures. Benefits:

• withstands operation at temperatures from -60 to +400 degrees;
• shows high heat resistance qualities;
• resistant to aggressive gas-air influences;
• does not require prior priming of the surface before application.

Disadvantages:

• the final drying time is 72 hours.

Requirements for operating system compositions

Organosilicate compositions are intended for coloring under difficult technical conditions. One-component and two-component paints must meet the list of requirements of the standard:

• provide coating in the form of a uniform semi-matte finish;
• the presence of a variety of colors;
• suspension viscosity - 20c;
• adhesion to the surface - from 1 to 2 points;
• coating thickness - from 60 to 100 microns;
• the ability to work at a t range of -60 to +300 degrees.

Organosilicates must have sufficient hiding power and withstand temperature loads without loss of quality.

Recommendations for selecting and scoring the best brands

Organosilicate paints are produced by companies specializing in the manufacture of products intended for painting industrial, industrial or car repair facilities. The catalog of companies contains materials that meet modern requirements.

Organosilicate paints are usually designated by two letters: "O" and "C". The numbers following the letter designation indicate the article.

Application technology

Some organosilicate glazes are applied without priming the base surface. Although special treatment is not required everywhere, priming is done to improve adhesion.

In addition, the coating must be properly cleaned before applying the paint.

Surface preparation

The surface is pre-cleaned of dirt, dust, traces of oils or salt deposits. Traces of corrosion must be removed from metal surfaces. If there is too much rust on the surface, converters are used. The surface is treated with special compounds, left for 30 minutes until a white foam forms, then the sediment formed on the surface is washed off with a rag. If necessary, the surfaces are specially washed with a hose, directing a powerful jet to the center of pollution.

After removing traces of dirt, the surface is treated with a degreaser. This rule applies to all types of surfaces, but especially to metal coatings.

To degrease the metal, xylene or a solvent is used. Inside they work with a degreaser particularly carefully. In order not to harm your health, be sure to use protective masks and gloves. After degreasing, the part is ventilated and left for 24 hours until the surfaces are completely dry.

When working outdoors, spray guns are used. This technique reduces processing time. Structures and structures are covered with a layer of degreaser from a distance of 30 centimeters, then washed with water and completely dried.

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Primer

If it is necessary to apply a primer to the surface, use special agents suitable for the selected type of organosilicate material. It is best to apply the primer in 2 coats. 16 hours are allocated for the drying of the first coat. The double layer is dried for 24 hours.

Only after checking the detachment do they move on to the next stage of work. The primer is applied with special devices, at the final stage they are passed over the surface with sandpaper to eliminate irregularities and smooth out flaws.

Reference! A primer is necessary when working with formulations whose adhesion has a value of less than 1 point on the generally accepted measurement scale.

Dyeing

Organosilicates are applied by brush, roller or spray gun. Additionally, there is an airless spray method that is used in manufacturing.

The air temperature during operation can vary from -30 to +40 degrees, while the air humidity should not exceed 80%. The best option would be to work at an air temperature of +20 degrees, then the paint will adapt well to the cleaned surface, harden and dry faster.

The main features of coloring:

• the spray gun is kept at a distance of 30-40 centimeters from the surface;
• weld seams, end pieces, protruding parts are painted with a wide brush before using the spray gun;
• metal surfaces are recommended to be painted in 2 or 3 layers;
• when using a roller, it is advisable to choose products with short hairs that create the same lines.

After painting a layer, it is necessary to maintain a sufficient pause for the material to set.A control of non stickiness is carried out 2 to 4 hours after the application of the first coat. A sheet of white paper is applied to the surface, then removed and the result is evaluated. If there are traces on the sheet of paper, it is necessary to leave the composition still.

Final coverage

Finishing painting is carried out after complete drying of the applied layers, observing the required time interval. If the work is done in the cold, then it takes 10 more hours for drying.

If the painting is carried out in an aggressive environment, then it is necessary to pre-cure the coating. To do this, it is exposed to temperatures from +250 to +400 degrees for 15 minutes. This increases the protective qualities of the material and creates a more durable finish.

It should be borne in mind that when working with organosilicates it is necessary to use personal protective equipment. Paints are toxic due to the presence of solvents. They belong to the third class of danger and are capable of harming health.

Advice from the masters

Experts recommend observing the basic rules when working with organosilicate compositions:

• before starting work, containers with paint are kept at room temperature for 8 hours;
• after opening the container, the paint must be thoroughly mixed with a special device;
• Due to the flammability of the material, additional protective measures must be taken.

With proper surface preparation and compliance with the rules for working with compounds, the service life of the painted surface lasts about 15 years.