Method of protecting metal surfaces inhibited with polymer compositions from corrosion and micro-capsules with corrosion inhibitors (versions)

FIELD: metallurgy.

SUBSTANCE: method consists in applying coating on polymer composition onto metal surface, where polymer composition is made on base of reactive resins, and in successive solidifying; in addition, there is used polymer composition containing micro-capsules with corrosion inhibitor preliminary introduced in micro-capsules from inert sorbent and/or inert sorbent with polymer shell of 1-100 mcm size. The micro-capsule with corrosion inhibitor used for protection of metal surfaces is made out of inert sorbent with polymer shell into pores of which corrosion inhibitor is impregnated and/or the capsule is covered with polymer shell produced by means of sedimentation of film forming substance from solution.

EFFECT: method facilitates upgrading degree of anticorrosion protection of coated metal surface due to continuous dozed release of inhibitor during operation of coating and due to constancy of inhibitor properties in coating; also method increases adhesion and strength of coating, reduces inhibitor consumption and localises selectivity of its effect.

9 cl, 2 dwg, 1 tbl, 4 ex

 

The present invention relates to the field of corrosion protection of metal surfaces for energy, petroleum and chemical equipment and can be used in heat exchangers, piping and tanks exposed to aggressive environments.

There is a method of corrosion protection of metal surfaces of pipelines and equipment of chemical industry and tube heat exchangers by applying a polymer compound on the basis of the reactive resin, followed by curing [Golovin, V., Ilyin A.B., Smith V.T., kublicki C.V., Shchelkov VA Corrosion protection and recovery of heat exchangers polymer coatings /Corrosion: materials, protection. 2003. No. 2, pp.2-8]. In this method, the corrosion-resistant coating made from a composition which includes a polymeric binder polymer system based on epoxy, phenol-formaldehyde, furan, polyurethane resins (for example, epoxypropanol compound VICTOR-793 TRIO or epoxy-amine compound VICTOR-TT production "NGOs VICOR").

However, this method of corrosion protection of surfaces of pipelines, equipment and tube heat exchangers does not protect the metal surface with the penetration of aggressive environment through the floor in places skolo the cover, cracks, microdefects, and adhesion defects.

Known corrosion-resistant coating [RF patent №2251563], made of a composition comprising a polymeric binder and hollow microcapsules made of glass, ceramics, polymers or mixtures thereof. It is made of a water-suspension of the composition and contains a water-based polymer latex composition comprising from 10 to 90 vol.% (co)polymer selected from the group comprising comprimer acrylate, styrene-acrylate copolymer, butadiene-styrene copolymer, polystyrene, butadiene polymer, a polyvinyl chloride polymer, a polyurethane polymer, a polymer or copolymer of vinyl acetate or mixtures thereof and from 10 to 90 vol.% a mixture of water and surfactant. As hollow microspheres composition contains a mixture of hollow microspheres with sizes from 10 to 500 μm, selected from the group comprising hollow glass microspheres, hollow ceramic microspheres, hollow polymeric microspheres, hollow man-made (ash). Corrosion-resistant coating further comprises a corrosion inhibitor (sodium nitrite, sodium benzoate, chromate guanidine and others) in amounts conventionally used in such aqueous dispersions. The inhibitor is introduced into the binder. Material with microspheres according to the patent of Russian Federation №2251563 are encouraged to use to improve mainly deploys the air qualities of polymeric coatings.

This system has all the shortcomings of direct injection of corrosion inhibitor, namely the deterioration of the adhesion and durability of the finished coating, decontamination and premature consumption of the inhibitor due to its reactions with components of the polymer base compounds when they are cured.

Known microcapsules with put into them corrosion inhibitors [RF patent №2111049]containing a chemical reagent and walls made of gelatin stabilized by an effective amount of a chelating agent and microcapsules contain 5-80% of a reagent selected from the group including scale formation inhibitor, corrosion inhibitor, biocide agent, a reagent to limit the presence of solid hydrocarbons, the reagent carrying H2S and/or O2. Such microcapsules are very fragile and can easily break. In the destruction of the microcapsules is quick selection of corrosion inhibitor in different parts of the oil wells in the oil and gas production. The concentration of the capsules in the working fluid is from 10 to 80%.

However, hydrophilic and water-soluble polymers (like gelatin) may not be applied in a protective polymer coatings due to the fact that they result in increased water sorption coating and improve its permeability, but also because of the incompatibility with the polymer binder of most types of the safety coatings. A consequence of the ease of destruction of the microcapsules is rapid (instantaneous) release of corrosion inhibitor that is good in the processing of wells, but does not provide the duration of action of the inhibitor in the coating. In addition, formed by the proposed method microcapsules do not have the necessary strength and will collapse already in the coating, for example, using the most modern methods airless spray.

The present invention solves the problem of increasing the degree of corrosion protection of the coated metal surface because:

- long-dosed release of the inhibitor in the process of coating,

- invariance properties of the inhibitor in the coating to fully cure the coating by preventing a reaction between the reactive components of the compounds on the basis of oligomers (including epoxy) inhibitor,

- increase the adhesion and strength of the coating due to the exclusion of uncontrolled effects of the inhibitor on the curing process of the polymer,

- reduce consumption of the inhibitor and the local selectivity of its action.

The problem is solved in that in the method of protection against corrosion of metal surfaces inhibited polymer compositions by applying to the metal surface polymer is s compositions based on reactive resin, followed by curing of the coating, the polymer composition contains microcapsules with a corrosion inhibitor, previously entered into microcapsules of inert sorbent and/or inert sorbent with a polymeric shell having a size of 1-100 microns.

The problem is solved in that in the method of corrosion protection of the metal surfaces of the microcapsules of inert sorbent and/or inert sorbent polymer shell have a size of 10-20 microns.

The problem is solved in that the microcapsule with a corrosion inhibitor that is used to protect metal surfaces made of an inert sorbent, the pores of which the corrosion inhibitor impregnated from the gas phase.

The problem is solved in that the microcapsule with a corrosion inhibitor that is used to protect metal surfaces made of inert sorbent polymer membrane, the pores of which are impregnated corrosion inhibitor, and a polymer membrane obtained by the deposition film-forming substance from a solution.

The problem is solved also by the fact that as a sorbent using porous alumina or zeolites of different brands, the porous silicon oxide.

The problem is solved also by the fact that as a film-forming substance used, the polymer is selected from the group of polyvinyl chloride, polystyrene, polymethylmethacrylat is, ethylcellulose, nitrocellulose, polyvinyl alcohol, polyvinyl acetate.

The problem is solved also by the fact that the coating is applied by airless spray at high pressure spray nozzle.

The problem is solved also by the fact that the coating is applied by brush or roller in several layers.

The invention is illustrated by figure 1 and 2, where Fig 1 presents the particle Al2O3with imprintirovannymi at a temperature of 120°With the inhibitor, and figure 2 presents the microcapsules inhibited sorbent in the polymeric membrane at 200-fold magnification.

The method of protection against corrosion of metal surfaces is as follows.

To obtain anti-corrosive coating to protect the metal surface is applied polymer composition (compound)containing pre-obtained by the following methods (options 1 or 2) microcapsules with a corrosion inhibitor in an amount of from 1 to 20 mass parts.

Microcapsules with a corrosion inhibitor, depending on the type of inhibitor is administered either preloaded into the polymer, either in the promoter or in the mixture of resin and hardener. The compound is thoroughly mixed.

The obtained compound is applied to the clean metal surface by brush, roller or by spraying in one or n is how many layers. Due to the high strength of microcapsules you can use the method airless spray. Spend the drying or curing of the coating.

The method of producing microcapsules (variant 1), containing a corrosion inhibitor, is as follows.

In the sealed container is placed the required amount of fine inorganic sorbent (50-90 mass parts) and 10-50 wt. parts of the organic corrosion inhibitor.

Conduct heating at a temperature of 15-20°C higher than the melting point or the boiling point of the inhibitor, but not above the temperature of decomposition.

The process continues until the complete absorption of the inhibitor in the free pore volume of the sorbent. Usually the warming up time is 3-6 hours.

The resulting powder retains a high dispersibility and flowability, which allows sieving with the selection of appropriate fractions.

The method of producing microcapsules with a polymeric shell (option 2), containing a corrosion inhibitor, is as follows.

In the first stage receive microcapsules of inorganic sorbent and inhibitor, as in option 1.

In the second stage, the resulting powder was additionally coated polymer membrane by deposition from a solution.

To this end, the (version 1) impregnated corrosion inhibitor dispersed in a 1-5% solution of film-forming polymer in the organic solvent in the amount of 1 parts by weight microencapsulated inhibitor 5 to 20 mass parts of a solution.

Then with vigorous stirring pour in 100 ml of mixture in 1000 ml of 0.1-0.3% aqueous solution of polyvinyl alcohol.

After a vigorous short (2-5 min) mixing the microcapsules are collected at the bottom of the vessel can easily be separated by centrifugation or sedimentation and after drying have the form of particles of various sizes from 1 to 100 microns.

If necessary, conduct the screening with the selection of appropriate fractions.

Below are specific examples of implementation of the claimed methods.

Example 1

Getting microencapsulated corrosion inhibitor

Getting microencapsulated corrosion inhibitor is in the creation of fine sorbent with imprintirovannymi it azole and amine corrosion inhibitor. It is produced by heating is placed in one container 70 wt. parts of a powder of Al2O3with 30 wt. parts of a 50% solution of benzotriazole (BTA) in NO-dimethylbenzylamine at a temperature of 15-20°C higher than the melting point of benzotriazole. The process continues until the complete absorption of the inhibitor in the free pore volume of the sorbent. The resulting powder retains flowability, as seen on the micrographs.

Obtaining a polymer compound

Obtaining a polymeric compound is at rst the situation in the microcapsulated epoxy resin corrosion (MIC) and amine hardener. In example No. 1, 100 g of low-viscosity epoxy resin E-240 impose 16.7 g obtained by the above-described technology microencapsulated inhibitor corrosion (MIC). The mixture is then thoroughly mixed and injected 20 mass parts of the amine hardener.

The application and curing of coatings

The prepared compound applied to grit-blasted plates of steel St-3. Application carried out by the brush. The thickness of the coating is 100-120 microns.

Curing of the coating is carried out at a temperature of 25±5°C for 7 days.

Example # 2

Getting microencapsulated corrosion inhibitor

Getting microencapsulated corrosion inhibitor is in the creation of fine sorbent with imprintirovannymi with him azole corrosion inhibitor. It is produced by heating is placed in one container 70 wt. parts of a powder of Al2About3with 30 wt. parts of benzotriazole (BTA) at a temperature of 15-20°C higher than the melting point of benzotriazole. The process continues until the complete absorption of the inhibitor in the free pore volume of the sorbent. The resulting powder retains a high dispersibility and flowability.

Obtaining a polymer compound

Obtaining a polymeric compound consists in introducing the mixture of reactive resins microencapsulated inhibitor corrosion (MIC) and hardener. In the use of the e No. 2 in a mixture of 60 parts by weight of epoxy resin ED-20 to 40 parts by weight of low viscosity phenoformaldehyde-furan resin RSF-014 previously administered the mixture of 8 parts by weight obtained by the above-described technology microencapsulated inhibitor corrosion (MIC) and 35 M.Ch. ketamine hardener. The mixture is then thoroughly mixed.

The application and curing of coatings

The prepared compound is applied by brush on cleansed skin plates of copper. Application carried out by the brush. The thickness of the coating is 100-120 microns.

Curing of the coating is carried out at a temperature of 25±5°C for 7 days.

Example # 3

Getting microencapsulated corrosion inhibitor

Getting microencapsulated inhibitor corrosion (MIC) is carried out in two stages. In the first stage receive inhibitor impregnated powder sorbent, and the second stage covers the particles of the sorbent with the inhibitor polymer shell.

Conducted in the first stage impregnation is achieved by sintering powder of zeolite with dithio-bis-benzthiazole (altacom) or its solution in benzene at a temperature of 120°C. It is produced by heating is placed in one container 80 wt. parts of zeolite powder with 20 wt. parts of altaxe. When the application is absorption inhibitor in free pore volume of the sorbent. The obtained impregnated corrosion inhibitor di is bergerot in a 2% solution of ethyl cellulose (EC) in methylene chloride in an amount of 10 parts by weight of on 100 mass parts of the solution.

In the second phase under vigorous stirring pour in 100 ml of mixture in 1000 ml of 0.2% aqueous solution of polyvinyl alcohol.

After a vigorous short (2-5 min) mixing the microcapsules are collected at the bottom of the vessel can easily be separated by centrifugation or sedimentation and after drying have the form of particles of various sizes from 1 to 100 µm (Figure 2).

Obtaining a polymer compound

Obtaining a polymeric compound is in the introduction to the microcapsulated epoxy resin corrosion (MIC) and a hardener of amine type. In example No. 3 in 100 parts by weight of epoxy resin ED-20 is injected at careful hashing previously obtained by the above-described technology microencapsulated inhibitor corrosion (MIC) in an amount of 20 wt. o'clock, 10 parts by weight of amine curing agent and 3 parts by weight of a diluent. Then the mixture is again stirred.

The application and curing of coatings

The prepared compound applied to grit-blasted plates of steel St-3. Application of compound exercise roller. Coating thickness is 120-150 microns.

Curing of the coating is carried out at a temperature of 25±5°C for 7 days.

Example No. 4

Getting microencapsulated corrosion inhibitor

Getting microencapsulated inhibitor corrosion (MIC) in the two stages. In the first stage receive inhibitor impregnated powder sorbent, and the second stage covers the particles of the sorbent with the inhibitor polymer shell.

Conducted in the first stage impregnation is achieved by sintering powder of silicon oxide with benzotriazole (BTA) at a temperature of 120°C. It is produced by heating is placed in one container 80 wt. parts of the silicon oxide powder with 20 wt. parts of benzotriazole. When the application is absorption inhibitor in free pore volume of the sorbent. The obtained impregnated corrosion inhibitor dispersed in a 2% solution of polymethyl methacrylate (PMMA) in methylene chloride (20 parts by weight per 100 mass parts of the solution.

In the second phase under vigorous stirring pour in 100 ml of mixture in 1000 ml of 0.2% aqueous solution of polyvinyl alcohol.

After a vigorous short (2-5 min) mixing the microcapsules are collected at the bottom of the vessel can easily be separated by centrifugation or sedimentation and after drying have the form of particles of various sizes from 1 to 100 μm (mostly 10-20 μm). Dried IPCC are a fine granular powder white or light beige color. Spend fractionation, separating the grain size of up to 20 microns.

Obtaining a polymer compound

Obtaining a polymeric compound is ostoic in the introduction in the microcapsulated epoxy resin corrosion (MIC) and amine hardener. In example No. 4 in 100 parts by weight of epoxy resin DER-330 is injected at careful hashing previously obtained by the above-described technology microencapsulated inhibitor corrosion (MIC) in an amount of 10 parts by weight, 10 parts by weight of amine curing agent and 5 parts by weight of the rheological additives and solvent. Then the mixture is again stirred.

The application and curing of coatings

The prepared compound applied to grit-blasted plates of steel St-3. Application carried out by airless spray. The thickness of the coating is 70-100 microns.

Curing of the coating is carried out at a temperature of 25±5°C for 7 days, followed by dauvergne at 100°C for 6 hours.

The results of comparative tests of corrosion resistance of the coatings obtained according to the present invention, and results of blank experiments are shown in the table.

Table
The corrosion resistance of the coatings
# exampleNotesThe degree of sub pellicle corrosion after exposure of 0.3% NaCl for 90 days at 50°CAdhesion by the method of cross-hatch test after the shock is Riki in 0.3% NaCl for 90 days at 50°C Conclusions
Example No. 1Substrate Steel-3, the coating contains microcapsules with inhibitor without shellLess than 5%. The remaining surface of the steel passivated, retains Shinethe 3 points. Peeling 22% of the squares on the lines of the incisionsThe metal surface is completely covered passivated; in places the breakout film of the corrosion process is inhibited
Idle experience to example No. 1Substrate Steel-3rd floor contains microcapsules without inhibitorNo experience is 100%. Continuous spotting film of corrosion products4 points. No experience is completely peeled off 90% of the squaresThe sample covered completely prokontroliroval, the film is easily permeable to chloride.
Example # 2The substrate is copper, the coating contains microcapsules with inhibitor without shellLess than 5%. The rest of the surface of copper retained glitterthe 3 points. Detachment 12% quadrati the s along the lines of cuts The metal surface is completely covered passivated; in places the breakout film of the corrosion process is inhibited
Idle experience to example No. 2The substrate is copper, the coating contains microcapsules without inhibitorNo experience is 100%. The entire surface has darkened and covered with a film of corrosion products4 points. No experience is completely peeled off 60% squaresThe sample covered was prokontroliroval, the film is easily permeable to chloride.
Example # 3Substrate Steel-3, the coating contains microcapsules with the inhibitor with the shell-based EI+PVALess than 15%. The remaining surface of the steel passivated, retains Shinethe 3 points. Peeling 32% of the squares on the lines of the incisionsThe metal surface is completely covered passivated; in places the breakout film of the corrosion process is inhibited
Idle experience to example No. 3 without IRSubstrate Steel-3rd floor contains reinforced mi is acapsule without inhibitor No experience is 100%. Continuous spotting film of corrosion products4 points. No experience is completely peeled off 90% of the squaresThe sample covered completely prokontroliroval, the film is easily permeable to chloride.
Example No. 4Substrate Steel-3, the coating contains reinforced oxidative microcapsules with inhibitor with shell based on PMMA+PVAMatt, is firmly connected with a surface protective film over the entire surface,2 points (debonded less than 5% coverage)The metal surface is passive, the adhesion is not degraded, the continuity of the coating saved, MICK effective through the pores of the sorbent and the wall of such capsules.
Idle experience to example No. 4Substrate Steel-3, coverage contains non-reinforced microcapsules with inhibitor with shell based on PMMA+PVAThe surface is almost pure, without etingov, however, the adhesion is broken, under floor air bubbles4 points (90% coverage of the Opera is foreseen) Hollow microcapsules break the continuity of the coating, making it look like foam. However, IR effectively inhibits the corrosion process.

1. Method of protecting metal surfaces from corrosion-inhibited polymer compositions comprising coating the surface of the metal coating from the polymeric compositions based on reactive resin, followed by curing, characterized in that the use of a polymer composition comprising microcapsules with a corrosion inhibitor, previously entered into microcapsules of inert sorbent and/or inert sorbent polymer shell with a size of 1-100 microns.

2. The method according to claim 1, characterized in that the use of a polymer composition comprising microcapsules of an inert sorbent and/or inert sorbent polymer shell size 10-20 μm.

3. The method according to claim 1 or 2, characterized in that the coating is applied by airless spray at high shear is applied in the spray nozzle.

4. The method according to claim 1 or 2, characterized in that the coating is applied by brush or roller layers.

5. The microcapsule with a corrosion inhibitor that is used to protect metal surfaces, characterized in that it is made from an inert sorbent, the pores of which inhibi the EOS corrosion impregnated from the gas phase.

6. The microcapsule according to claim 5, characterized in that an inert sorbent used porous alumina or zeolites of different brands, the porous silicon oxide.

7. The microcapsule with a corrosion inhibitor that is used to protect metal surfaces, characterized in that it is made from an inert sorbent polymer membrane, the pores of which are impregnated corrosion inhibitor, and a polymer membrane obtained by the deposition film-forming substance from a solution.

8. The microcapsule according to claim 7, characterized in that an inert sorbent used porous alumina or zeolites of different brands, the porous silicon oxide.

9. The microcapsule according to claim 7, characterized in that as a film-forming substance used, the polymer is selected from polyvinyl chloride, polystyrene, polymethyl methacrylate, ethyl cellulose, nitrocellulose, polyvinyl alcohol, polyvinyl acetate.



 

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FIELD: chemistry.

SUBSTANCE: invention refers to polymeric compound for improved corrosion resistance coating to be used for corrosion protection of structural components of metal and concrete buildings, pipelines, metal carriers and assemblies for various engineering fields, to design wear-proof self-levelling floors being solvent and oil resistant, as well as for decorative finish of the surfaces specified above. The compound is two-component and is generated by combining component A and component B in ratio 1:0.01 to 1:100. Component A contains the following components in ratio, wt %: diane epoxy resin 60-62, aliphatic epoxy resin 12-13, basalt bulk additive 26-27. Basalt bulk additive is andesite basalt scale of fraction size 0.001-0.4 mm. Component B is mixed oligoamide hardener in amount 71-73 wt % and specified andesite basalt scale in amount 27-29 wt %. Hardener is aromatic oligoamide ETAL. Invention allows for lower toxicity of compound, improved barrier protective properties, and extended functional area.

EFFECT: lower toxicity of compound, improved barrier protective properties, and extended functional area.

2 tbl

FIELD: chemistry.

SUBSTANCE: invention refers to versions of solidificated powder coating composition and to method of cathodic protection of steel substrate. According to the first version, the composition contains as follows: (a) thermosetting resin, (b) zinc borate compounds in amount 0.5 to 4.75 wt % in relation to total solid weight, (c) curing agent for the specified structure, in amount effective for coating solidification, (d) filler, pigment and additive. Thermosetting resin is epoxy with functional groups of A/epichlorhydrin bicphenol. Curing agent is accelerated dicyandiamide or phenolic curing agent. According to the second version, the composition contains thermosetting epoxy, curing agent specified above, and zinc borate compound in amount 0.5 to 4.75 wt % in relation to total solid weight. Method of cathodic protection consists that steel substrate is machined and covered with the composition of the first version. It is followed with polarisation of steel substrate covered as cathode.

EFFECT: higher long-time cathodic disbandment resistance with high temperature and humidity application.

14 cl, 3 tbl, 6 ex, 1 dwg

FIELD: chemistry.

SUBSTANCE: an active base - wastes from production of perchlorocarbons, which is a mixture of saturated and unsaturated perchlorocarbons, chlorohydrocarbons and resinous wood are mixed with a solvent at 70-90°C temperature for 1.0-1.5 hours. Dioctylphthalate, "ХП-470" chloroparaffins, epoxy resin "ЭД-20" or "ЭД-18", polyethylenepolyamines or polypropylenepolyamines are then added. The mixture is then stirred at 75-85°C for 1.5-2.0 hours. The components of the composition are taken in the following ratio, in wt %: 40-50 of the above mentioned active base, 0.4-1.6 dioctylphthalate, 0.1-0.4 "ХП-470" chloroparaffins, 2.0-4.5 epoxy resin "ЭД-20" or "ЭД-18", 0.2-1.4 polyethylenepolyamines or polypropylenepolyamines, and solvent constitutes the rest.

EFFECT: increased resistance to effect of aggressive media and simplification of preparation of the composition.

3 cl, 1 tbl, 6 ex

FIELD: chemistry.

SUBSTANCE: according to the first version of the method, an active base - resinous wood, separated through steam distillation from non-recycled wastes from production of epichlorohydrin, is heated to 55-70°C for 0.5-1.0 hours. Epoxy resin "ЭД-20" or "ЭД-18", dioctylphthalate and a solvent are then added. The reaction mixture is stirred at 45-80°C for 1.0-1.5 hours. The components are taken in the following ratio, in wt %: 65-85 active base, 2.0-3.5 of the above mentioned epoxy resin, 0.4-0.6 dioctylphthalate, and solvent constitutes the rest. The second version of the method involves mixing the active base - resinous wood, separated through steam distillation from non-recycled wastes from production of vinyl chloride, and a solvent at 60-70°C for 2 hours. Dioctylphthalate is then added, as well as epoxy resin "ЭД-20" or "ЭД-18" and polyethylenepolyamines, and the reaction mixture is kept at 65-75°C for 2 hours. The components are taken in the following ratio, in wt %: 60-80 active base, 0.35-0.5 dioctylphthalate, 2.8-3.5 of the above mentioned epoxy resin, 0.6-1.2 polyethylenepolyamines, and solvent constitutes the rest.

EFFECT: increased resistance to effect of aggressive media and simplification of preparation of the composition.

4 cl, 2 tbl

FIELD: chemistry.

SUBSTANCE: corrosion-resistant coating can be used for time-interval corrosion prevention (conservation) of contact surfaces of frictional bolted assemblies within large-sized bridge steel-works transported and stored after manufactured at factory of origin. Corrosion-resistant coating is made of composition containing chlorvinyl enamel CV-114, slightly soluble corrosion inhibitor Acor-1 and rheological additive that is modified carbamide solution in N-methylpyrrolidone, deposited on metal surface been layered, vapour blasted and hardened.

EFFECT: elimination repeated vapour blasting of contact surfaces of joint steel-works prior to be field mounted, and maintaining of friction properties of vapour blasted metal surfaces joint with high-strength hardware.

3 cl

Heat protective dye // 2245350

FIELD: chemical industry, paint-vehicle systems, in particular heat protective dyes.

SUBSTANCE: claimed dye contains ceramic and corundum microspheres; resins, selected from group including silicone resin, polyesterepoxy resin, acrylic resin dispersions as binder; pigment; and aluminum powder as deflector. Such composition provides reduced heat loss into environment. Obtained dyes have thermal gradient, improved heat-retention properties and strength, and useful in corrosion and heat-loss protection of building construction, transport, gas and oil lines, heating systems, etc.

EFFECT: easier method for dye production; strength and homogenous heat protective dye layer of improved adhesiveness.

2 cl, 3 tbl

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