Composition for producing heat-protective coating and heat-protective coating

FIELD: chemistry.

SUBSTANCE: composition includes hollow aluminosilicate or corundum microspheres, binder in the form of aluminophosphate with free aluminium oxide content of less than 4 wt %, and water with the following ratio of components, wt %: aluminosilicate or corundum microspheres - 45-65, aluminophosphate - 35-55, water - the balance. The microspheres used have internal diameter of 6-250 mcm and wall thickness of 1-10 mcm. The invention also relates to a heat-protective coating which consists of at least two layers on a base, the first of which is the undercoat, and the second layer is made of said composition, wherein the composition for the first layer further includes C45-C60 fullerenes in amount of 0.001-0.002 wt %.

EFFECT: obtaining a durable coating with high operating temperature.

9 cl, 3 tbl, 6 ex

 

The group of inventions relates to the production of heat-shielding coatings designed for thermal insulation of structures and equipment operating at temperatures up to + 2000°C, such as pipes, furnaces, and can find application mainly in energy, metallurgy, etc.

The invention is based on the use of hollow aluminosilicate ceramic or refractory microspheres, in which the composition with a binder withstand the operating temperatures up to 2000°C.

Known heat-resistant coating composition, representing thermal protective paint (patent RF №2245350, IPC C09D 5/08, C09D 1/04)containing the filler, binder and additives. The filler used evacuated (hollow) ceramic or refractory microspheres with a particle diameter of from 3 to 100 μm and a bulk density of 300-400 kg/m3with the following mass distribution of particle size, wt.%: base diameter (30-60 μm) 45-55; diameter (3-10 μm) 15-17; diameter (11-20 µm) 8-10; diameter (21-30 ám) 6-8; diameter (61-70 μm) 9-11; diameter (71-80 μm) 4-6; diameter (91-100 μm) 2-4; in use as a binder resin, silicone, polyetheramine or acrylic dispersions, and as additives - reflector - aluminum powder and the pigment, in the following ratio of components, wt.%: microspheres 55-70 between 30-35, reflector - aluminium p is the DRA 2,0-5,0, the pigment is 0.1 to 0.6.

Heat-shielding coating obtained by applying paint, uniform in composition and has a sufficiently high adhesion to the surface to be protected. However, this coating has insufficient resistance to high temperatures (the operating temperature of the coating does not exceed 250°C) and does not have a sufficiently high thermal properties (thermal conductivity, heat exchange and heat output).

Closest to the claimed invention is a composition for obtaining a high temperature thermal barrier coatings (application for invention of the Russian Federation No. 2011136161, IPC C09D 5/00)containing hollow ceramic or refractory microspheres, binder and water. The binder composition contains lumberport or alumacraft, or polytitanate potassium, or a mixture of alumacraft and polytitanate potassium. As hollow ceramic microspheres are used aluminosilicate microspheres "fly Ash" diameter 3-150 μm and a wall thickness of 1-6 μm or ceramic microspheres with a diameter of 3 to 100 μm and a wall thickness of 0.3 to 1.0 μm. As the hollow refractory microspheres can be used microspheres with a diameter 3-90 microns and a wall thickness of 0.5-3.0 mm.

Heat-shielding coating obtained by applying this composition, provided the operating temperature up to 1350°C. At a temperature bol is further than 1350°C microspheres were dissolved in lumberport or alumacraft, which led to the destruction of the coating. In addition, to increase the strength of the coating, after application on a protected surface, need additional termootdelenii at a temperature of 310°C, at which cross-linking of the binder oxygen "bridges"that complicates the technology of thermal protective coating.

The inventive composition can be used to obtain long lasting and durable coating with working temperatures above 1350°C, by using a variant of the composition with the curing agent, get a durable coating without additional high temperature heat.

The task and the technical result of the invention is to develop a composition for obtaining thermal protective coating with superior heat and thermophysical properties. In addition, the resulting coating is characterized by high uniformity and adhesion of the coating to the substrate by forming a phosphate film on the protected metal, an expanded working temperature range is non-combustible material with significant flame-retardant properties. For example, a steel beam covered with a 5 mm layer of the proposed composition is heated in fire conditions up to 500°C temperature strength loss in 45 minutes.

The problem is solved by the fact that h is of the composition to obtain thermal protective coating includes a hollow aluminosilicate microspheres "fly Ash" or corundum microspheres, binder and water as a binder it contains lumotast, in the following ratio of components, wt.%:

hollow silica-alumina or corundum microspheres45-65
lumotast35-55
waterrest

Microspheres used with an internal diameter selected from a range of values 6-250 mcm commensurate with the wavelength of the infrared radiation to provide conditions for its maximum absorption microspheres, and wall thickness in the range of 1-10 microns, selected to ensure the desired strength of the material. This aluminosilicate microspheres are used with a diameter 6-250 microns and a wall thickness of 4-10 microns, corundum microspheres are used with a diameter 6-90 μm and wall thickness of 1-5 mm.

In one embodiment of the composition may contain a curing agent in an amount of from 1 to 3 wt.%, the hardener used dehydrated (for example, calcined to 800°C) magnesium oxide. The compositions used in conditions of high vibration and mechanical stress, can optionally contain quartz staple in the amount of from 1 to 3 wt.% thick strands of 3-10 μm and the Lina 3-10 mm. In addition, to improve adhesion and increase the service life of the coating composition add fullerenes C45-C60in the amount of from 0.001 to 0.002 wt.%.

Alumophosphate in the use composition with a content of free alumina to 4 wt.%, which can be obtained by blending 40 to 45 wt.% aluminum oxide and 60-55 wt.% phosphoric acid at a temperature of 90-110°C to dissolve the aluminum oxide, with phosphoric acid take concentrated (with a concentration of 60%). So, get lumotast characterized by the presence of excessive amounts of aluminum oxide that allows you to enter into it microspheres containing aluminum without the risk of dissolving them in excess of phosphoric acid.

The problem is solved also by the fact that thermal protective coating obtained by coating the claimed composition on the protected surface consists at least of two layers, the first of which is a primer made from the composition by adding fullerenes, and the second layer is made of a composition without the addition of fullerenes, the thickness of the first layer is 0.1-1.0 mm, the thickness of the coating is up to 7 mm

In the proposed composition for heat-resistant coating as a filler can be used hollow aluminosilicate microspheres fly ash of thermal power plants collected from fil the ditch, or corundum microspheres in the present limits of diameters and thicknesses, obtained by vacuum (foaming) crushed corundum materials. The material of the microspheres is selected with a view to ensuring the high temperature coating - up to 2000°C.

The choice of materials and sizes of the microspheres produced on the basis of experimental data, determining their optimal ratio sufficient to provide the required strength of the structure. When applying the composition on the protected surface recrystallization of aluminum oxide with the formation of particles with large (up to 2 m in g) surface area, which increases the viscosity, strength and heat resistance of the resulting coating. thermal conductivity of the inventive coating is in the range from 0.06 to 0.1 W/m·K.

To obtain the composition of the original components are mixed in a vessel with anchor stirrer described in proportions to obtain a homogeneous mass. Data listed above binder is characterized by the absence of chemical interaction with the material of the microspheres.

The proposed coating can be applied to the surface of metal, concrete, brick, and equipment furnaces, pipelines and ducts during operation of objects coated at temperatures from minus 0°C to + 2000°C.

The coating is applied to any surface used in the coating method in the form of one or more layers of a thickness of, for example, 4-7 mm.

Typically, the thickness of all layers offer coverage does not exceed 7 mm and depends on the nature of the surface conditions of a temperature mode of operation. After application to the surface of the material or product layer or multiple layers of coating and drying the deposited layers is formed of heat-shielding coating is firmly connected with the base and with a high performance.

The best alternative use of the invention is achieved by coating at least two layers, the first layer is a primer (designed for the initial deposition of the metal), made with the addition of fullerene C45-C60to improve adhesion and hardening of the surface layer. Fullerenes, having a huge electromagnetic charge, form an additional adhesion at the molecular level. Other layers (made without the addition of fullerenes) is applied on the primer layer. The experimental data is multi-layered (for example, two-layer) coating increases the life of the coating by 20-30%. The number of deposited layers depends on the desired conditions of operation the AI protected structures.

The essence of the invention is illustrated by the examples presented in tables 1, 2.

Table 1
No.ComponentsComposition No. 1, wt.%Composition No. 2, wt.%Composition No. 3, wt.%
1Lumotast6035.050.0
2Microspheres silica /fly ash/3055.045.0
3Water1010.05.0

27
Table 2
No.ComponentsComposition No. 4, wt.%Composition No. 5, wt.%Composition No. 6, wt.%
1Lumotast5535
2Microspheres corundum457265
3Water-1-

Table 3 presents the parameters characterizing the properties obtained in Examples 1-6 coatings.

Table 3
No.PropertiesComposition No. 1Composition No. 2Composition No. 3Composition No. 4Composition No. 5Composition No. 6
1kth:W/m·K0.90.060.0730.0780.0540.055
2Plasticityno+++ no+
3Ostoich. 2000°C2 hours72 hours72 hours100 hourno100 hour

As can be seen from Table 3, when using the components of the composition in the amount coming out of the claimed range of values (compositions No. 1 and No. 5), get coverage, which drop sharply operating parameters. Floor not able to form a protective surface film and is destroyed after 1-3 hours temperature effects. When using components in the stated intervals of values (compositions No. 2-4 and 6) receive coverage in high performance.

The present invention allows to obtain coatings with unique thermal properties that may find its extensive use in the construction industry, metallurgical industry, i.e. where you want to make the surfaces of the heat-and fire-resistant properties in the operation of the coatings in harsh temperature conditions.

1. The composition for obtaining thermal protective coating comprising hollow silica-alumina or corundum microspheres, binder, which is used lumotast is tons of content free of aluminum oxide to 4 wt.%, and water in the following ratio, wt.%:

silica-alumina or corundum microspheres45-65
lumotast35-55
waterthe rest,

when microspheres are used with an internal diameter selected from a range of values 6-250 μm, and a thickness of 1-10 μm.

2. The composition according to claim 1, characterized in that the aluminosilicate microspheres used with a wall thickness of 4-10 microns.

3. The composition according to claim 1, characterized in that corundum microspheres are used with a diameter 6-90 microns and a wall thickness of 1-5,0 μm.

4. The composition according to claim 1, characterized in that it contains a hardener in an amount of from 1 to 3 wt.%, the hardener used magnesium oxide.

5. The composition according to claim 1, characterized in that it contains quartz staple in the amount of from 1 to 3 wt.% thick strands of 3-10 μm and a length of 3-10 mm

6. The composition according to claim 1, characterized in that lumotast receive a mixture of alumina and concentrated to 60% phosphoric acid at a temperature of 90-110°C. to dissolve the aluminum oxide, in the following ratio, wt.%:

aluminium oxide40-45
phosphoric acid60-55.

7. The composition according to claim 1, characterized in that it further comprises fullerenes With45-C60in the amount of from 0.001 to 0.002 wt.%.

8. thermal protective coating consisting of at least two layers located on the substrate, the first of which is a primer made from the composition according to claim 7, and a second layer made from the composition according to any one of claims 1 to 6.

9. thermal protective coating of claim 8, characterized in that the thickness of the first layer is 0.1-1.0 mm, the thickness of the coating is up to 7 mm



 

Same patents:

FIELD: chemistry.

SUBSTANCE: invention relates to compositions for obtaining thermal barrier coatings, which can be applied for an external thermal protection of elements of spacecraft constructions, as well as in construction and aircraft. A composition of the thermal barrier coatings contains dry re-dispersible latex based on copolymers of vinylacetate and ethylene or vinylacetate and vinylversalate as an organic binding agent and a group of filling agents, including vermiculite with the bulk density 95-110 kg/m3 and an average size of particles 1 mm, perlite with the bulk density not more than 100 kg/m3, kaolin, glass microspheres with dimensions 15-200 mcm and the bulk density 240-320 kg/m3 and a fibrous material.

EFFECT: invention provides thermal protection of metal and non-metal constructions against high-temperature rapid aerodynamic heating.

4 cl, 1 tbl

FIELD: chemistry.

SUBSTANCE: fire-protecting composition for covering glass-reinforced plastics includes perchlorovinyl resin, as organic solvent, mixture of butylacetate and acetone in ratio 1:1, as expansion agent, phosphorus-boron-nitrogen-containing oligomer, preliminarily obtained as a result of interaction of methylphosphite borate, epoxy resin ED-20 and aniline in weight ratio 2.5:1:2.5.

EFFECT: invention makes it possible to provide high fire protection for glass-reinforced plastic coatings.

3 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to intumescent compositions which are curable at ambient temperature, use thereof to protect structures, and substrates coated with said composition. The intumescent composition contains A) binder, containing (i) a resin which contains a polysiloxane chain or a precursor of said chain, and (ii) optionally an organic resin, and (iii) at least one type of a functional group selected from a group comprising epoxy resin, an amino group, a mercaptan group, a carboxylic acid group, an acrylonitrile group, an isocyanate group, an alkoxysilyl group and an anhydride group, wherein said functional groups are present either as side and/or terminal groups in said resin, which includes a polysiloxane chain or a precursor of said chain, and/or an organic resin, under the condition that if the binder contains alkoxysilyl groups only as one type of said functional groups, then said alkoxysilyl groups are present in the organic resin, B) a compound capable of reacting with or which is a catalyst in the reaction between functional groups and C) a foaming agent and a phosphorus-containing substance as a carbon-forming secondary additive.

EFFECT: obtaining intumescent compositions.

12 cl, 5 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to fire-resistant, thermal-protective coatings for different types of surfaces of different shapes which require thermal- and fire-protection, used in different industries as fire-proof, thermal-protective coatings for pipelines of heating systems, boilers and other thermal equipment, for coating equipment in order to protect personnel from contact burns from hot and cold metal surfaces, for cooling equipment used in facilities with unfavourable humidity and temperature conditions as an anti-condensate and anti-corrosion coating, for external heat-insulation of buildings and structures and internal treatment of buildings in order to prevent freezing and dampness of walls. The fire-resistant, thermal-protective coating is made from a composition which includes an acrylic dispersion, filler - closed non-combustible hollow glass microspheres with size or 20-200 mcm, which are free-flowing powders with packed density of 0.18-0.30 g/cm3, kaolin, zinc borate, inorganic binder which is a composition of liquid sodium glass and nano-size silicon hydroxide modified with sodium aluminate, auxiliary components - titanium dioxide, pearlite, aluminium hydroxide, functional additives - decabromodiphenyl oxide, plasticiser S-3, curing agent - sodium silicofluoride and water.

EFFECT: obtaining a thermal-protective coating which is non-combustible, heat-resistant, with high adhesion to metal, concrete plastered and brick surfaces, improved environmental properties and improved technology of obtaining the coating.

2 tbl, 6 ex

FIELD: chemistry.

SUBSTANCE: invention relates to building materials and can be used in applying fire-retardant coatings on building structures. The fire-retardant composition in form of a water-tempered dry mixture for applying coatings is characterised by that it contains, wt %: portland cement 20.0-60.0, expanded vermiculite 10.0-40.0, chrysotile asbestos 5.0-25.0, chamotte 5.0-25.0, expanded pearlite 10.0-30.0, polyfunctional concrete modifier 0.1-1.0, fine water-soluble adhesive 2.0-8.0 and a water-retaining additive 0.1-3.0.

EFFECT: improved crack resistance owing to strain redistribution on the whole material.

2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to the chemical industry, namely to fire protective varnish and paint materials for protection of different structures and materials, for instance, wood, metal surfaces, and can be used, for instance, in construction, aviation, railway transport. An intumescent fire-retardant paint contains, wt %: a redispersible polymer binding agent 8-12, a carbonising substance - polyol 10-20, a foaming agent 10-20, a latent source of an organic acid 20-40, a pigment 4-7, a filling agent 8-10 and a thickening agent 0.1-0.5. Before application dry components of paint are mixed with water.

EFFECT: invention is aimed at increase of fire protective properties of paint and strength of cohesion with a protected surface, with simultaneous provision of transport costs reduction, simplicity of application and effectiveness of use, as well as extends the range and arsenal of application.

9 cl

FIELD: transport.

SUBSTANCE: invention relates to elastomeric body suitable to be used in anti-vibration appliances and suspensions. Elastomeric body (1) has at least one layer of elastic and flexible flame-retardant coating covering part of the body (1). At least one layer of flame-retardant coating is non-halogenated and contains flame-retardant substance and elastic binding substance. Flame-retardant substance of one layer contains expandable graphite. Elasticity of at least one layer of coating exceeds 20%.

EFFECT: invention permits to improve fire resisting properties, to lower smoke formation and toxicity when elastomeric bodies are used in land vehicle, floating vessel, fixed equipment.

21 cl, 13 dwg, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to construction materials, namely to field of fireproof materials, and is intended for application of fireproof coating on single cable, bundle of cables or cable lines in construction of different buildings and constructions for ensuring nonproliferation of flame on cable surface. Fireproof composition includes, in wt %: melamine - 10.5-25, ammonium polyphosphate - 10-30, titanium dioxide - 0.5-7, pentaerythritol - 10-17, dispersion of vinylacetethylene - 10-50, plasticiser - 0.5-5, ethylene glycol - 0.5-5 to reduce minimal temperature of film formation, paraffin-based foam extinguisher - 0.1-1, hydroxyethylcellulose - 0.1-0.8, as structure-forming agent and reological additive and water - the remaining part. Coating based on obtained fireproof composition does not require reduction of current loading, does not crack and does not impair adhesion to surface in the process of exploitation.

EFFECT: invention can be used in residential and industrial buildings.

FIELD: chemistry.

SUBSTANCE: invention relates to construction materials, namely to field of fireproof swelling materials and is intended for application on external and internal surfaces of wooden and wooden glued constructions for protection against fire and prevention of spread of flame on the surface of constructions. Fireproof composition for wood coating contains melanin, pentaerythrite, titanium dioxide, long-chained ammonium polyphosphate, dispersion of vinyl acetylene copolymer, as well as functional additives - ethylene glycol for reduction of minimal temperature of film-formation, paraffin-based foam extinguisher, hydroxyethylcellulose as structure-forming agent and water.

EFFECT: invention ensures increase of fireproof efficiency, reduction of toxicity of combustion products, prevention of flame spread on the surface of wooden construction, reduction of minimal temperature of film-formation of coating and increase of radiation resistance of coating.

1 ex

FIELD: chemistry.

SUBSTANCE: fire retardant composition contains epoxy resin, a curing agent, aluminium hydroxide, a fire retardant system consisting of ammonium polyphosphate, melamine and pentaerythritol, titanium dioxide as a UV filter, melamine borate and a solvent.

EFFECT: obtaining a fire-retardant coating intended for use in chemically aggressive conditions of the industrial atmosphere.

4 ex

FIELD: chemistry.

SUBSTANCE: invention relates to fire-resistant, thermal-protective coatings for different types of surfaces of different shapes which require thermal- and fire-protection, used in different industries as fire-proof, thermal-protective coatings for pipelines of heating systems, boilers and other thermal equipment, for coating equipment in order to protect personnel from contact burns from hot and cold metal surfaces, for cooling equipment used in facilities with unfavourable humidity and temperature conditions as an anti-condensate and anti-corrosion coating, for external heat-insulation of buildings and structures and internal treatment of buildings in order to prevent freezing and dampness of walls. The fire-resistant, thermal-protective coating is made from a composition which includes an acrylic dispersion, filler - closed non-combustible hollow glass microspheres with size or 20-200 mcm, which are free-flowing powders with packed density of 0.18-0.30 g/cm3, kaolin, zinc borate, inorganic binder which is a composition of liquid sodium glass and nano-size silicon hydroxide modified with sodium aluminate, auxiliary components - titanium dioxide, pearlite, aluminium hydroxide, functional additives - decabromodiphenyl oxide, plasticiser S-3, curing agent - sodium silicofluoride and water.

EFFECT: obtaining a thermal-protective coating which is non-combustible, heat-resistant, with high adhesion to metal, concrete plastered and brick surfaces, improved environmental properties and improved technology of obtaining the coating.

2 tbl, 6 ex

FIELD: chemistry.

SUBSTANCE: invention relates to building materials and can be used in applying fire-retardant coatings on building structures. The fire-retardant composition in form of a water-tempered dry mixture for applying coatings is characterised by that it contains, wt %: portland cement 20.0-60.0, expanded vermiculite 10.0-40.0, chrysotile asbestos 5.0-25.0, chamotte 5.0-25.0, expanded pearlite 10.0-30.0, polyfunctional concrete modifier 0.1-1.0, fine water-soluble adhesive 2.0-8.0 and a water-retaining additive 0.1-3.0.

EFFECT: improved crack resistance owing to strain redistribution on the whole material.

2 tbl

FIELD: construction.

SUBSTANCE: asphalt-concrete mix includes as a mineral material the crushed with fraction of 0-5 mm, and the binder is bitumen of grade BND 90/130, and the structuring additive is mechanically activated sapropel. The ratio of components is as follows, wt %: crushed limestone with fraction of 0-5 mm - 93, oil viscous bitumen - 6.3, mechanically activated sapropel - 0.7.

EFFECT: asphalt concrete has improved complex of strength properties.

3 tbl

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

FIELD: construction.

SUBSTANCE: bitumen concrete mix includes crushed limestone of 0-5 mm grain size as mineral material, asphalt cement BND 90/130 as a binder, and mechanoactivated lignite as modification agent in the following component ratio, wt %: crushed limestone of 0-5 mm grain size - 93; asphalt - 6.3; mechanoactivated lignite - 0.7.

EFFECT: modification agent increases adhesion properties of crushed stone/binder system thus producing bitumen concrete with good mechanical properties and streamlining and accelerating mix preparation process.

3 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: method of producing calcium carbonate-containing materials, the surface of particles of which has improved dispersant adsorption properties, comprises the following steps: a) producing at least one calcium carbonate-containing material in form of an aqueous suspension or in dry form; b) producing at least one lithium ion-containing compound selected from a group comprising lithium hydroxide or lithium oxide or inorganic and/or organic monomer lithium salts selected from a group comprising mono- or polybasic acid salts, e.g., lithium carbonate, lithium sulphate, lithium citrate, lithium bicarbonate, lithium acetate, lithium chloride, lithium phosphate, in dry form or in aqueous form, and mixtures thereof; c) a combination of at least one lithium ion-containing compound from step (b) and at least one calcium carbonate-containing material from step (a).

EFFECT: invention enables to obtain a calcium carbonate-containing material in dry form or in form of a suspension, having high concentration of dry substance and low Brookfield viscosity, which retains stability over time, and good pH buffering capacity.

44 cl, 2 dwg, 10 tbl, 9 ex

FIELD: chemistry.

SUBSTANCE: invention relates to finishing interior wall surfaces. The method of finishing an interior wall involves preparing a base for building panels containing gypsum, cement or combinations thereof; applying a coating mixture on the surface of the base, said mixture containing 10-40 wt % latex emulsion binder, 30-80 wt % calcium sulphate hemihydrate, 0.1-2 wt % set inhibiting agent, 0.05-2 % of a polymer having molecular weight less than 6000 Da, said polymer being selected from a group consisting of polymers obtained from monomers such as vinyl acrylates, vinyl acetates, vinyl chlorides, ethylene styrenes, substituted ethylenes, as well as polymers having a polyamide skeleton or carboxylate functional groups, and 10-40 wt % water. The invention also relates to a building panel with said coating.

EFFECT: use of the coating mixture enables to cut the duration of the process of finishing walls, and enables use thereof to make novel building panels and for recoating old walls in need of repair.

10 cl, 3 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: invention relates to plaster-like material and can be used in coatings and articles. A faced panel includes a structural panel and a dried coating which contains calcium sulphate hemihydrate in a latex polymer matrix free from water and containing a two-component agent which prevents setting. The facing mixture contains calcium sulphate hemihydrate, a latex emulsion polymer, a two-component agent consisting of a low-molecular weight polymer and a phosphonic acid compound, sulphates or mixtures thereof, and water.

EFFECT: invention shortens the duration of finishing a wall and reduces the number of coating steps, has operational characteristics and working quality of plaster.

9 cl, 3 tbl, 4 ex

FIELD: process engineering.

SUBSTANCE: invention relates to thin-film glass-ceramic coatings used in science of materials and medicine. Proposed method comprises preparing film-forming solution, applying first layer of said solution of silicon substrate, second said layer and, once more, said first layer. Every said layer applied, stepwise thermal treatment is performed at 60°C for 30 min and, then, stabilisation annealing is performed at 700°C for 1 h. Composition of said first film-forming solution includes zirconium oxochloride and 96 wt % of ethyl alcohol. Composition of second film-forming solution includes tetra ethoxysilane, calcium chloride, orthophosphoric acid and 96 wt % of ethyl alcohol.

EFFECT: stable coat with high refractive index and thickness over 100 nm.

3 cl, 3 ex

Putty // 2495067

FIELD: chemistry.

SUBSTANCE: invention relates to putty for levelling surfaces of concrete articles. The putty contains the following, wt %: portland cement 28.0-32.0; water 24.0-26.0; bentonite clay 1.0-1.5; quartz sand 42.85-44.4; modified technical lignosulphonate 0.1-0.15.

EFFECT: high strength of adhesion of the putty with concrete surface.

1 tbl

FIELD: chemistry.

SUBSTANCE: composition for producing heat-resistant composites contains the following, wt %: spent catalyst IM-2201 10-15, crushed stone 33-40, sand 10-13, H3PO4 10-15, aluminium-chromium wastes from etching aluminium alloys containing, wt %: SiO2 - 7.2, Al2O3 - 68.3, Fe2O3 - 1.4, MgO - 0.7, Cr2O3 - 10.2, R2O - 11.8 24-30.

EFFECT: high ultimate compression strength and heat-resistance of the fire-resistant composites.

4 tbl

Up!