RU2514940C1 - Dyeing multifunctional protective coating - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: dyeing multifunctional protective coating includes an inorganic binder, an organic binder, hollow glass microspheres, dyeing pigments. The organic binder comprises in the form of acrylic suspension, water, hardener - sodium silicon fluoride, as auxiliary components: zinc oxide, aluminium oxide, stibium trioxide, kaolin, perlite sand, carboxymethylcellulose.

EFFECT: invention provides for a composition having good adhesive properties when applied onto such surfaces as metal, concrete, bricks, wood, rubber.

3 tbl, 3 ex

Description

The invention relates to multifunctional protective coatings for surfaces of all shapes and materials, and can be used in various industries as heat-insulating, sound-proofing, waterproofing, anti-corrosion and electrical protective coatings, cushioning and sealing material.

A fireproof heat-insulating coating is known made of a composition comprising components in a dry form: a binder - dry redispersible liquid glass or a mixture of it with cement, hollow microspheres, fillers and water to the desired consistency. Borosilicate glass with a bulk density of 0.05-0.35 g / m ^{3 is} used as hollow microspheres (RF patent No. 2318782 dated 02.06.2006, publ. 10.03.2008). The main disadvantages of the product are:

- preparation of the coating immediately before use by mixing the dry product with water at positive temperature. - caking of the product over time and at humidity.

A fireproof heat-resistant coating is known, obtained on the basis of polymer binders - phenol - furfural - formaldehyde resin, a copolymer of vinyl chloride with acrylonitrile, an epoxy diane resin, a plasticizer - phosphpolyol, a pore-forming agent-acetone, a filler-perlite, talc, mica, and an amethylene-alcohol-hardener (RF patent No. 2215765 of 09/07/2001, publ. 10.11.2003).

The disadvantages of the composition are:

- the use of organic solvents - acetone, aliphatic alcohol, which worsen the environmental situation, create a fire hazard in the manufacture and use of the composition, especially when used indoors.

- the use of perlite and acetone as a blowing agent creates an open-pore system, which leads to an increase in moisture capacity during condensation of water vapor and deterioration of heat-shielding properties.

A known composition for producing anti-corrosion, flame retardant and heat insulating coatings (RF patent 2288927 from 07/13/2005, publ. 10.12.2006).

The composition includes liquid sodium or potassium glass, a filler is a mixture of hollow microspheres, a nonionic surfactant, a reinforcing filler is expanded vermiculite or asbestos filaments, titanium dioxide.

The disadvantage of the composition is the increased water absorption of the coating, associated with hydrophilicity and the presence of a surfactant, the rigidity of the system, the likelihood of cracks and a decrease in the main property of the coating - thermal protection.

The closest in technical essence is a heat-shielding composition for surfaces of any shape that require thermal protection (RF patent No. 2400506 C09D 1/00, C08K 7/22 from 10/12/2009, published on 09/27/2010) (the closest analogue).

The composition includes an inorganic binder aluminosilicon, an organic binder selected from the group of aqueous dispersions of polymers of acrylate, butadiene, polyurethane, vinyl acetate, copolymers of acrylate with styrene, butadiene styrene copolymer, polyvinyl alcohol and mixtures thereof, hollow glass microspheres with a size of 20-200 microns and bulk , 18-0.30 g / cm ³ (12-30), auxiliary components in the form of coloring pigments, ammonium polyphosphate and hydrosil and titanium dioxide.

The disadvantage of the composition is the complexity of the process of converting aluminosilicon to a liquid state.

An object of the invention is to provide a composition having good adhesive properties when applied to surfaces such as metal, concrete, brick, wood, rubber and other materials, while providing soundproofing, waterproofing, heat-insulating, anti-corrosion, electrical, anti-mold and fungal, anti-condensation properties coatings that are resistant to ultraviolet rays, in particular surfaces of pipelines operating in specific harsh conditions: at ature from minus 70 ° С to plus 650 ° С, while protecting them from corrosion, increasing fire resistance, durability of pipelines, reducing heat losses and also carrying out non-waste work on insulation of pipelines.

The technical result is achieved by the fact that the multifunctional protective coating includes an inorganic binder, an organic binder, hollow glass microspheres, coloring pigments, while containing an organic binder in the form of an acrylic dispersion, and additionally contains hardener sodium silicofluoride, as auxiliary components: zinc oxide, oxide aluminum, antimony trioxide, kaolin, perlite sand, carboxyl methyl cellulose, water in the following ratio, wt.%:

Inorganic binder 18-35 Organic binder 5-42 Hollow Glass Microspheres 15-20 Pigment coloring 0-0.3 Auxiliary components 7-15 Sodium Cremnefluoride 0-1.13 Distilled water rest

As an inorganic binder, sodium liquid glass containing sodium oxide and silicon dioxide was selected. The content of sodium oxide and silicon dioxide ensures the absence of cracking, has excellent adhesion to various surfaces

Liquid sodium glass is an aqueous colloidal system with a silicate module of 2.6-3.3.

The use of an inorganic binder gives the heat-shielding composition enhanced properties of incombustibility, thermal protection and adhesion to surfaces.

The organic binder is selected from the group of aqueous dispersions of acrylate polymers, copolymers of acrylate with styrene, styrene-butadiene copolymer and mixtures thereof.

When mixed with an organic polymer, glass sodium liquid is in a colloidal state, as a result of which a polymer-colloidal system is formed. The combination of an inorganic binder and an organic polymer increases the strength, adhesion, elasticity, and crack resistance of the coating.

Closed non-combustible glass hollow microspheres ranging in size from 15 to 125 μm are free-flowing powders with a bulk density of 0.24-0.32 g / cm ³ , grades MC, MS-A and 2L, are a filler.

A mixture of glass hollow microspheres with zero water absorption provides a high degree of filling the free space of the composition and, as a result, high heat-shielding properties. The use of microspheres with zero water absorption gives the coating stability of heat-shielding properties when the coating is wetted.

Coloring pigments - to give color to the composition.

Auxiliary components:

aluminum hydroxide - for the mechanical hardening of the coating layer, kaolin - for refractoriness, perlite sand, zinc oxide - as one of the components of the rust converter and imparting reflective properties to the composition, antimony trioxide - as a flame retardant.

Carboxylmethyl cellulose is a powdery, fiber containing material from white to cream in color, used as an adhesive composition.

Sodium silicofluoride is added as an additional additive for better and faster hardening, and depends on the application conditions associated with the ambient temperature.

A method of obtaining a heat-shielding composition.

With constant stirring, the inorganic and organic binder is introduced into the mixer with small portions, then zinc oxide, aluminum hydroxide, coloring pigment, filler and the required amount of water are successively added to obtain a certain mass density, and stirring is carried out at room temperature for 35-40 minutes until a homogeneous mixture is achieved.

The finished paint multifunctional protective coating obtained as a result of the technological process is a homogeneous pasty mass, and can also be in a state of liquid consistency. The composition is easy to use.

The composition can be applied to the surface with a brush, spatula, as well as other methods.

After application of the composition to the surface and drying, a dense, waterproof, non-combustible heat-insulating coating is formed on the treated surface. The thickness of the finished coating is from 0.5 to 3.0 mm and above, depending on the purpose.

The advantages of the heat-shielding composition is the absence of organic solvents in its composition. Environmentally friendly coating is used for exterior and interior use.

Table 1 presents specific examples of compositions claimed as an invention.

Table 1 Name of components The content of the components according to the examples, wt.% Example 1 Example 2 Example 3 Distilled water 34.15 - - Inorganic binder 28.34 30.13 28.34 Organic binder 5.41 40.46 40,45 Pigment coloring - 0.3 0.2 Sodium Cremnefluoride 1.13 - - Hollow Glass Microspheres 16.90 18.45 19.5 Auxiliary components 14.07 7.46 8.21

Auxiliary components include: zinc oxide, carboxymethyl cellulose (for wallpaper), aluminum oxide, antimony trioxide, kaolin, perlite sand.

Table 1a presents the content of auxiliary components.

Table1a Auxiliary components The content of the components according to the examples, wt.% Name of components Example 1 Example 2 Example 3 Kaolin 3.05 2.96 - Perlite sand 2.0 - 3.32 Aluminum hydroxide 4,5 3,5 3,5 Zinc oxide 2.2 2,3 2.89 Carboxymethyl cellulose 2,32 2.2 2.0 Antimony trioxide 3.15 2,36 2.02

Table 2 shows some of the properties of the resulting coatings.

table 2 Name of parameters Parameter Value Test method Example 1 Example 2 Example 3 Water absorption in 24 hours by volume,% 0,045 - - GOST 17177-84 Contact thermal conductivity, W / mK 0,065 0,039 0,047 GOST 7076-99 The adhesion to metal, kg / cm ² 9.8 8.9 8.6 GOST 26589-94 Adhesion to concrete, kg / cm ² 10,4 9.1 9.6 GOST 26589-94 Conditional tensile strength, kg / cm ² 13.1 10.3 9.9 GOST 26589-94 Elongation at break,% 16.9 14.9 15.8 GOST 26589-94 Corrosion resistance Steady Steady Steady GOST 26589-94 Open flame Does not burn Does not burn Does not burn

Painting multi-functional protective coating can be used at utilities, heating networks for insulation of pipelines, oil refining industry, energy, thermal insulation of building facades, thermal and waterproofing of roofs, etc., for thermal insulation of pipelines, heating networks, boilers, underground tanks, electrical and anti-corrosion insulation masts of high-voltage power lines, etc., during internal processing of premises to prevent freezing of walls, the formation of dampness and mold of fungi.

It is suitable for any coating and can be applied as ordinary paint, with a brush, roller or other methods.

Advantages and characteristics of the application of the multifunctional protective coating paint thermal insulation of pipelines, heating networks, boilers, underground tanks, external thermal insulation of buildings and structures, roofs, attics, internal processing of rooms to prevent freezing of walls, dampness and mold, fungi, coating equipment to protect personnel from contact burns with hot metal surfaces (up to + 650 ° С), anti-condensation and anti-corrosion coating of cold and g pipelines hot water supply, electrical and anticorrosive insulation of power transmission masts and other objects.

Operational range from -70 ° С to + 650 ° С,

Electrical insulation up to 6000 V.

It is applied by brush, roller or mechanically,

Decrease in losses of thermal energy to 30-35%,

Consumption: 1 liter per 1.5 sq. M with a coating layer of 1 mm,

Excellent adhesive properties.

The painting multifunctional protective coating is restored during thawing after freezing at minus -50 ° С with preserving the properties, withstands multiple cycles of the “freeze-thaw” process. The multifunctional protective coating can be applied both mechanically by applying to the surface to be treated (with a spatula or brush), and using spray systems at temperatures from minus -20 ° С to + 400 ° С.

The claimed invention meets the criterion of "novelty", because from available sources of information, technical solutions with the same essential features were not identified.

The claimed invention meets the criterion of "inventive step", as it is not obvious to a specialist.

Claims (1)

A multifunctional coloring protective coating comprising an inorganic binder, an organic binder, hollow glass microspheres, coloring pigments, characterized in that it contains an organic binder in the form of an acrylic dispersion, water, hardener sodium silicofluoride, as auxiliary components; zinc oxide, alumina, antimony trioxide, kaolin, perlite sand, carboxyl methyl cellulose, in the following ratio, wt.%:
Inorganic binder 18-35 Organic binder 5-42 Hollow Glass Microspheres 15-20 Pigment coloring 0-0.3 Auxiliary components 7-15 Sodium Cremnefluoride 0-1., 13 Distilled water rest