Method for corroded metal surface protection and recovery

FIELD: chemistry.

SUBSTANCE: invention concerns method of protection and recovery of corroded metal surfaces operating in abrasive wear conditions and aggressive media, e.g. in fertiliser transportation, and can be applied in power-producing, chemical and mining industry for rusted equipment repair. Method involves application of primer layer on metal surface with further drying till aftertack, insulation layer with further drying till aftertack, and external layer with further drying to complete hardening. Primer layer is made of composition including the following components, wt %: 20.0-30.0 of epoxy diane resin with epoxy equivalent weight of 450-500, 15.0-25.0 of Versamid 115 polyamide solidifier, 12.0-25.0 of pigments, 12.0-25.0 of fillers, 2.0-5.0 of amine-containing Cardolite NC 562 solidifier based on 3-n pentadecanylphenol, the rest is organic solvents. Insulation layer is made of composition including the following components, wt %: 20.0-35.0 of epoxy diane resin with epoxy equivalent weight of 450-500, 15.0-30.0 of Versamid 115 polyamide solidifier, 5.0-10.0 of fillers, 10.0-50.0 of micaceous iron ore, 2.0-5.0 of amine-containing Cardolite NC 562 solidifier based on 3-n pentadecanylphenol, 0.8-1.2 of structurising additive, the rest is organic solvents. External layer is made of composition including the following components, wt %: 20.0-40.0 of acrylic or polyether hydroxyl-containing resin, 11.0-22.0 of aliphatic isocyanate solidifier, 10.0-20.0 of pigments, 10.0-40.0 of micaceous iron ore, 5.0-10.0 of fillers, 0.2-0.6 of polysiloxane modified organically, 0.8-1.2 of structurising additive, 0.6-2.4 of aluminum powder, the rest is organic solvents. Composition of external layer includes additionally Metatin Catalyst tin dibutyllaurate in amount of 0.05-0.5 wt % as drying accelerator.

EFFECT: enhanced corrosion resistance of coating.

cl, tbl, 2 ex

 

The invention relates to the field of coatings on metal surfaces, steel, iron, aluminum, working in conditions of abrasive wear, corrosive environments in the energy, chemical and mining industries.

There is a method to protect and restore corroded metallic surfaces, comprising applying a primer layer on the base composition containing, wt.%:

epoxy resin with an epoxy equivalent
weighing 450-50020,0-30,0
pigments12,0-25,0
fillers12,0-25,0
hardener based on 3-n pentadecanolide6,0-12,0
organic solventsrest

with subsequent drying "up tack-free surface, applying an insulating layer of a composition containing, in wt.%:

epoxy resin with an epoxy equivalent
weighing 450-50020,0-35,0
pigments5,0-10,0
fillers5,0-10,0
hardener based on 3-n pentadecanolide6,0-12,0
f the th oxide 10,0-30,0
organic solventsrest

with subsequent drying "up tack-free", causing the outer layer of the following composition, wt.%:

epoxy resin with an epoxy equivalent weight of 450-50020,0-30,0
pigments10,0-15,0
fillers15,0-25,0
hardener based on 3-n pentadecanolide6,0-12,0
organically modified polysiloxane0,2-0,6
organic solventsrest

(U.S. Pat. Of the Russian Federation No. 2220995, BI # 1 of 10.01.2004,).

However, this method provides insufficient protective properties of the coating.

Closest to the present invention is the following method to protect and restore corroded metal surfaces: on the fat surface applied consistently primer of the following composition, wt.%:

epoxy resin with an epoxy equivalent
weighing 450-50020,0-30,0
Pigments12,0-25,0
Fillers12,0-25,0
polyamide from enitel Versamid 115 20,0-30,0
organic solventsrest

and after drying it "until tack-free", that is, to the degree 1 according to GOST 19007-73, put insulating layer of the following composition, wt.%:

epoxy resin with an epoxy equivalent
weighing 450-50020,0-35,0
Pigments5,0-10,0
Fillers5,0-12,0
the polyamide hardener Versamid 1156,0-12,0
iron oxide10,0-30,0
organic solventsrest

and then surface dried "up tack-free", will also cover the outer layer of the following composition, wt.%:

/table>

then the dried coating to fully cure (patent RF №2304601).

However, this method provides insufficient protective properties of the coating.

The technical result of the invention is to improve the protective properties of the coating.

This technical result is achieved in that in the method of protection and restoration of corroded metallic surfaces, comprising applying a primer layer on the base composition containing epoxy Dianova resin with an epoxy equivalent weight of 450-500, polyamide hardener Versamid 115, pigments, fillers, organic solvents, followed by drying "up tack-free surface, applying an insulating layer of a composition containing epoxy Dianova resin with an epoxy equivalent weight of 450-500, polyamide hardener Versamid 115, fillers, iron oxide, organic solvents, followed by drying "up tack-free", causing the outer layer of the composition containing acrylic or polyester hydroxyl-containing resin, the curing agent is an aliphatic polyisocyanate, pigments, fillers, organically modified polysiloxane, organic solvents, followed by drying to complete curing, priming and insulating layers impose additional aminecontaining compound brand Cardolite NC 562 is based 3-n pentadecanolide, in insulating and outer layers impose additional structuring additive, and in the outer layer further added aluminum powder and iron oxide in the following ratio of components in layers:

in the composition of the primer, wt.%:

acrylic or hydroxyl-containing polyester
Resin20,0-40,0
curing agent based on aliphatic MDI11,0-22,0
Pigments10,0-20,0
Filler5,0-10,0
organically modified polysiloxane0,1-0,5
organic solventrest
epoxy Dianova resin with epoxy
equivalent weight of 450-50020,0-30,0
pigments12,0-25,0
fillers12,0-25,0
the polyamide hardener Versamid 11515,0-25,0
aminecontaining compound Cardolite NC 5622,0-5,0
the basis of 3-n pentadecanolide
organic solventsrest

in the composition of the insulating layer, wt.%:

epoxy Dianova resin with epoxy
equivalent weight of 450-50020,0-35,0
structuring additive0,8-1,2
fillers5,0-10,0
aminecontaining compound Cardolite NC 5622,0-5,0
the basis of 3-n pentadecanolide
the polyamide of vertical Versamid 115 15,0-30,0
iron oxideof 10.0 to 50.0
organic solventsrest

in the composition of the outer layer, wt.%:

acrylic or hydroxyl-containing polyester
resin20,0-40,0
pigments10,0-20,0
fillers5,0-10,0
iron oxide10,0-40,0
structuring additive0,8-1,2
aluminum powder0,6-2,4
hardener aliphatic polyisocyanate11,0-22,0
organically modified polysiloxane0,2-0,6
organic solventsrest

In the composition of the outer layer can optionally enter a drying accelerator di-butylurea tin grade Mettin catalyst in the amount of 0.05-0.5 wt.%.

As epoxy Dianova resin use any epoxy Dianova resin with an epoxy equivalent weight of 450÷500, for example, ED-8 GOST 10587-84, e-R THE 6-10-607-78, e-41 THE 6-10-1316-84 and other

As pigments used chromium oxide, crown zinc, strontium and lead, blue phtalocyanines, red glands of the oxide, titanium dioxide, carbon technical and other

As fillers use a micro-talc, omyacarb, mikrobasic, talc and others.

As a polyamide hardener is used, the product of the interaction of fatty acids and polyethylenepolyamine company Henkel (Germany) trademark Versamid 115.

As the iron sludge use any iron oxide, for example:

a) brand Miox firm Kärntner Montanindustrie (Austria)containing Fe2O3- 85-94%, Al2About3- 2-3%, MgO - 1-2%, Sa - 0,3-1%, SiO2- 3-6%, Pb<0,1%;

b) iron oxide Altai Deposit Ore log" containing oxides of silicon, aluminum, magnesium and calcium, respectively, not more than 2.5, 1.8V, 0,2, 0.3% and a content of iron oxide Fe2About3- 90-95%;

in grade Nubifer company Nubiola (Spain)containing Fe2About3- 89-94%, Al2O3to 1.9%, MgO Of 0.1%, CaO - 0,4%, SiO2- 4,2%, K2O - 0,2%;

g) brand IMDOX AG firm FLOOD (Germany), containing Fe2O3- 92-97%, Al2O3of 1.6%, MgO - 1,1%, CaO - 0,8%, SiO2at 2.3%, K2About<0,05%, TiO2<0,1, K2O<0,05%, Na2O<0,05%, P2O3<0,05%, MnO<0,05%.

As organically modified polysiloxane use modified polyester polydimethylsiloxane stamps BIC-307 firms BIK-Chemie (Germany) - modified polyester polysiloxane brand Baysilone OL 17 Bayer (Germany).

As institutions the institutions solvents used xylene, acetone, ethyl cellosolve, butyl acetate, ethyl acetate, etc.

As acrylic or hydroxyl-containing polyester resin is used, for example:

(a) hydroxyl-containing acrylic resin Macrynal SM 636/70 YOU company Cytec Surface Specialties, representing a polyacrylate containing hydroxyl groups;

b) hydroxyl-containing acrylic resin Macrynal SM 510 company Cytec Surface Specialties (Belgium), a polyacrylate containing hydroxyl groups;

C) hydroxyl-containing polyester resin Desmophen 670 VA, Bayer, representing a polyester containing hydroxyl groups.

As the aliphatic polyisocyanate hardener used aliphatic polyisocyanate hardeners based on the monomer of hexamethylenediisocyanate, for example, brands:

a) Desmodur N75 MPA/X Bayer, Germany;

6) Tolonate HDB75 IN the company Rhodia, France;

in) Uronal NL firm Galstaff, Italy.

As aminecontaining hardener brand Cardolite NC 562 apply aminecontaining compound on the basis of 3-n pentadecanolide company Cardanol (Netherlands) brand Cardolite NC 562.

As structuring additives used silicon dioxide grades a-175, Aerosil grades R-972, R-812 firm Degussa (Germany), Benton 38 and Bentone SD-2 by Elements (England).

As the aluminum powder used aluminum powder brands PAP-1 and PAP-2, aluminum paste brand PD, issue sceau Krasnoturyinsk plant, aluminum pasta brands Stapa 88 and Mobilux R167 company Eckart (Germany) and others.

Protecting and recovering the metal surfaces of the equipment in the conditions of abrasive wear in aggressive environments is carried out by applying to the surface of the combined coating that consists of three layers:

the first layer provides adhesion of the composition to a metal surface and corrosion protection, the coating can be a layer of corrosion thickness up to 50 microns;

- the second layer has the main shock and barrier protection;

- the third layer provides the appearance of the coating and excellent sliding abrasive materials.

Method of protecting metal surfaces is as follows.

Example No. 1: on the steel surface.

Originally applied primer composition, wt.%:

epoxy Dianova resin ED-8 epoxy equivalent
weighing 45030,0
pigments: titanium dioxide6,0
strontium chronologicly6,0

fillers: micro-talc6,0
mikrobasic6,0
polyamide otward the tel Versamid 115 25,0
aminecontaining compound Cardolite NC 562
the basis of 3-n pentadecanolide5,0
organic solvents: xylene4,0
the ethyl cellosolve8,0
acetonerest

The composition for the first layer coating is prepared by mixing dissolvere part epoxy resin and organic solvents with pigments and fillers, dispersing the resulting paste on a bead mill and the preparation of the composition by adding a pigment paste the residual amount of the solvent and epoxy resin and mixing until smooth. The resulting composition is combined with hardeners and put on corroded(Permitted layer corrosion to 50 μm.) the surface with a brush or by means of air or airless spray. The primer layer is dried "up tack-free", then put the insulation layer of the following composition, wt.%:

Epoxy Dianova resin e-41 epoxy EC-
divalentin weight -50030,0
structuring additive: Aerosil R-8120,8
fillers: mica5,0
the micro-talc5,0
aminecontaining compound Cardolite NC 5625,0
the basis of 3-n pentadecanolide
the polyamide hardener Versamid 11530,0
iron oxide Miox10,0
organic solvents: xylene5,0
the ethyl cellosolverest

The composition for an insulating layer is prepared as follows: a solution of epoxy resin in an organic solvent are mixed in disolver with fillers and structuring additive, then dispersed in a bead mill, then make up the composition in the mixer, equipped with a stirrer, add remaining solvent and epoxy resin and iron oxide and mix all until smooth for 40 minutes. Add hardeners. The composition is uniformly applied on the primer layer and dried "up tack-free", then put the third layer composition, wt.%:

hydroxyl-containing polyester resin brand
Desmophen 670BA30,0
pigments: titanium dioxide13,0
CZK lead lemon1,85
blue f is alienology 0,15
fillers: micro-talc3,0
mikrobasic2,0
iron oxide brand Nubifer20,0
structuring additive: Benton 381,2
aluminum powder PAP-20,6
hardener aliphatic polyisocyanate brand16,0
Tolonate HDB-75B
organically modified polysiloxane0,6
BIC-307
xylene4,0
butyl acetate2,0
the ethyl acetaterest

The outer layer is prepared by mixing parts of a polyester or hydroxyl-containing acrylic resins, pigments, fillers, structuring additives, organic solvents in disolver and dispersion in a bead mill, and then in the mixer and the resulting paste is mixed with the remaining amount of resin, solvent, organically modified polysiloxane, iron oxide and aluminium powder for half an hour until smooth. Add the hardener. The composition is uniformly applied on the insulating layer. The drying time of the combined coverage of all layers up to degree 3 at 20° - 24 hours.

the safety floor is used for painting of bridges and steel structures.

Example No. 2: the iron surface.

Applied primer composition, wt.%:

epoxy Dianova resin e-R with epoxy20,0
equivalent weight 500
pigments: zinc phosphate14,5
titanium dioxide10,0
carbon technical0,5
fillers: micro-talc10,0
mikrobasic2,0
polyamide hardener brand Versamid 11515,0
aminecontaining compound Cardolite NC 562-based
3-n pentadecanolide2,0
organic solvents: ethyl cellosolve10,0
xylene10,0
acetonerest

Then put the insulating layer composition, wt.%:

Epoxy Dianova resin ED-8 epoxy equivalent-20,0
Lenten weighing 500
fillers: talc2,0
the micro-talc3,0
polyamide hardener brand Versamid 115 16,0
aminecontaining compound Cardolite NC 562-based

3-n pentadecanolide2,0
structuring additive: silica A-1751,2
iron oxide Altai field50,0
organic solvents: xylene3,0
acetonerest
Then apply the outer layer composition, wt.%:
hydroxyl-containing acrylic resin brand Macrynal
SM636/70 YOU20,0
pigments: pigment yellow iron oxide4,0
carbon technical0,4
titanium dioxide5,6
fillers: talc3,0
mikrobasic2,0
aliphatic polyisocyanate curing agent mark
Desmodur N75 MPA/X13,0
iron oxide brand Miox40,0
aluminum powder brand Stapa 882,4
structuring additive: Aerosil brand R-9721,2
dibutil the Aurat tin, Mettin catalyst 0,5
organically modified polyester polysiloxan
brand Baysilone OL 170,2
organic solvents: xylene4,0
butyl acetate3,0
the ethyl acetaterest

The drying time of the combined three-layer coating to grade 3 at 20° - 24 hours.

Table 1 shows the properties of three-layer coatings.

Table 1
The test results of the coatings
Feature coverageThe prototype is a coating applied by the method according to the patent 2304601The coating on the proposed method
example No. 1example # 2
Evaluation of the protective properties of three-layer coverage when tested in corrosive environments according to GOST 9.403
3%solution KS1, days400480480
distilled water, days540640680
gasoline, days600700720
mineral oil, days600700720

1. The way to protect and restore corroded metallic surfaces, comprising applying a primer layer on the base composition containing epoxy Dianova resin with an epoxy equivalent weight of 450-500, polyamide hardener Versamid 115, pigments, fillers, organic solvents, followed by drying "up tack-free surface, applying an insulating layer of a composition containing epoxy Dianova resin with an epoxy equivalent weight of 450-500, polyamide hardener Versamid 115, fillers, iron oxide, organic solvents, followed by drying "up tack-free", causing the outer layer of the composition containing acrylic or polyester hydroxyl-containing resin, the curing agent is an aliphatic polyisocyanate, pigments, fillers, organically modified polysiloxane, organic solvents, followed by drying to complete curing, characterized in that the primer and the insulating layers impose additional aminecontaining compound brand Cardolite NC 562-based 3-n pentadecanolide, insulating and the outer layer impose additional structuring additive, and in the outer layer further added aluminum powder and iron oxide, the next is the rate of components in layers:

in the composition of the primer, wt.%:

epoxy Dianova resin with epoxy
equivalent weight of 450-50020,0-30,0
pigments12,0-25,0
fillers12,0-25,0
the polyamide hardener Versamid 11515,0-25,0
aminecontaining compound Cardolite NC 5622,0-5,0
the basis of 3-n pentadecanolide
organic solventsrest

in the composition of the insulating layer, wt.%:

in the composition of the outer layer, wt.%:

epoxy Dianova resin with epoxy
equivalent weight of 450-50020,0-35,0
structuring additive0,8-1,2
fillers5,0-10,0
aminecontaining compound Cardolite NC 5622,0-5,0
the basis of 3-n pentadecanolide
the polyamide hardener Versamid 11515,0-30,0
iron oxideof 10.0 to 50.0
organic solventsrest
acrylic or hydroxyl-containing polyester
resin20,0-40,0
pigments10,0-20,0
fillers5,0-10,0
iron oxide10,0-40,0
structuring additive0,8-1,2
aluminum powder0,6-2,4
hardener aliphatic polyisocyanate11,0-22,0
organically modified polysiloxane0,2-0,6
organic solventsrest

2. The method according to claim 1, characterized in that the composition of the outer layer optionally enter a drying accelerator dibutyltin tin, Mettin catalyst in the amount of 0.05-0.5 wt.%.



 

Same patents:

FIELD: chemistry.

SUBSTANCE: invention concerns antirust modificating coating obtained from composition of (mass %): orthophosphoric acid -25.0-40.0; graphite "ГЭ-3" - 12.0-30.0; acryl dispersion Diakam-11 -30.0-50.0; auxiliary substance "ОП-10" - 0.25-2.5; industrial flaxseed oil - 2.0-10.0; concrepol "B" based on water solution of poly-N-vinylpyrrolidone - 0.2-2.0.

EFFECT: application at temperature below zero possible; faster drying; wide range of storage temperature; longer storage without exfoliation and wider range of maintenance temperatures for a building covered with this coating.

1 tbl

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FIELD: protecting materials.

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5 tbl

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2 tbl, 16 ex

FIELD: chemical industry; mechanical engineering; extractive industry; heat and power industry; other industries; methods of protection and recovery of the of the corroded metallic surfaces.

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1 tbl, 2 ex

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3 tbl

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FIELD: protective materials.

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12 cl, 7 tbl, 21 ex

FIELD: paint and varnish industry.

SUBSTANCE: invention relates to rust modifying agents that are used for applying on corroded metal surfaces. The described anticorrosive modifying coating comprises the following components, weight %: acrylic dispersion "Diakam-11" as a film-forming agent, 36.0-48.0; graphite GE-3 as a pigment and filling agent, 14.0-23.0; 8-oxyquinoline as a chelating agent, 0.5-1.8; ortho-phosphoric acid as a modifying additive, 25.0-35.0; polyethylsiloxane liquid PES-5, 5.0-10.0; accessory agent OP-10, 0.2-0.5, and concrepol AD-1 based on poly-N-vinylpyrrolidone aqueous solution, 0.5-1.5. Invention provides the possibility for effective conversion of rust to neutral undercoat, prolonged exploitation time being both in corrosive and water-saturated media and under conditions of open atmosphere in the range of temperatures from -70°C to +200°C and without additional overcoating with paint and varnish materials and without applying on mazut-coated and oiled metallic surfaces without their degreasing.

EFFECT: improved and valuable properties of coating.

1 tbl

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SUBSTANCE: invention pertains to the technology of polymer functional materials and can be used in machine building when forming coatings for component part of machines, mechanisms and transport systems, and mainly pipes for pumping petroleum products. The method of forming composition coating from silicate polymer material involves mixing powder polymer particles and silicate particles. The mixture is then deposited on the surface of the object and heated. Polymer particles are flushed off and monocrystallisation of the coating is carried out. The powder polymer particles are chosen from a group containing polyamide, polyethyleneterphtalate, high pressure polyethylene. Silicate particles are chosen from a group containing montmorillonite, kaolin, tripolite. Heating and flushing off are done in a gas stream with density of 3·106-9·106 W/m2 for a period of 10-4-10-3 s. Depositing and monocrystallisation are done on an object, heated to temperature T=Tm+5÷40°C, where Tm is the melting temperature of the polymer, with pressure of the gas stream of 3-5 atmospheres. The coating is formed by depositing it on one or more ducts of the used device for depositing it, or is deposited by successive passage of the device with the polymer component, and then a device with the silicate component.

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3 cl, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention pertains to compositions based on soluble fluoropolymers, meant for protecting metallic surfaces from action of water and aggressive media. The compositions can be used in the chemical industry and other industries when making equipment. Description is given of the anticorrosive composition is given. It consists of a soluble copolymer of tetrafluoroethylene with vinylidene fluoride, organic solvents - acetone, ethylacetate, cyclohexanone and amyl acetate, low molecular epoxide diane resin of the "ЭД-8" or "ЭД-10" type, amine hardening agent product of condensation of formaldehyde and phenol with ethylenediamine of the "АФ-2" type, diluting agent - ethyl cellosolve and an extra filler - graphite or molybdenum sulphide with proposed ratios of the components. Description of the method of coating metals is also given, in which the above mentioned composition is deposited on a non-greasy surface. The first and subsequent layers are dried under the same conditions at temperature of 15-25°C for a period of 20-30 minutes, and final coating is done at 120-200°C for 4-6 hours.

EFFECT: protection of metal surfaces from water and aggressive media.

3 cl, 5 ex, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to protection of metals from corrosion using lacquer coating. This engineering problem can be solved by using calcium hydroxyethylidenediphosphonate with formula CH3(OH)C(PO3)2Ca2 as an anti-corrosion pigment, with higher anti-corrosion activity as compared to the prototype - protonated zinc hydroxyethylidenediphosphonate and a control specimen - zinc tetraoxychromate.

EFFECT: low-toxic high performance anti-corrosion pigment.

1 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: invention concerns antirust modificating coating obtained from composition of (mass %): orthophosphoric acid -25.0-40.0; graphite "ГЭ-3" - 12.0-30.0; acryl dispersion Diakam-11 -30.0-50.0; auxiliary substance "ОП-10" - 0.25-2.5; industrial flaxseed oil - 2.0-10.0; concrepol "B" based on water solution of poly-N-vinylpyrrolidone - 0.2-2.0.

EFFECT: application at temperature below zero possible; faster drying; wide range of storage temperature; longer storage without exfoliation and wider range of maintenance temperatures for a building covered with this coating.

1 tbl

FIELD: inorganic chemistry.

SUBSTANCE: invention refers to anticorrosive coatings of cold drying and can be applied for corrosion prevention of steel, zinc-coated steel, cast-iron and aluminium surfaces. Described anticorrosive paint-and-lacquer composition is cured with aliphatic polyisocyanate containing hydroxyl acrylic or polyester resin, pigments, filling agents, organically modified polysiloxane, organic solvent, structure-forming agent, thermoplastic acrylic copolymer, dispersant at specified components ratio. Technical result is coating based on specified composition having high protective properties as tested in mineral oil, petrol and water.

EFFECT: production of anticorrosive coating with high protective properties.

2 tbl, 3 ex

FIELD: inorganic chemistry.

SUBSTANCE: anticorrosive composition is applied for corrosive prevention of reinforced concrete and metal surfaces of structures and equipment in high humidity and sulphur dioxide, hydrogen sulphide, chlorine, ammonia. Anticorrosive composition contains industrial lignosulphonates, tall pitch, colophony, pigment-aluminium powder PAP-1, reducing agent - titanium dioxide, zinc phosphate, zinc oxide, hardener - polyethylenepolyamine, modifying agent - hexamethylenetetramine, providing high water resistance. To provide rheological properties composition contains acryloyltrimethylamidopropylammonium chloride in amount 0.02 weight fractions 0.02. Technical result is improved light resistance, reduced dryout period and widen range of colours of protective coating.

EFFECT: production of anticorrosive coating with improved protective properties.

3 cl, 2 tbl

FIELD: antifriction materials.

SUBSTANCE: invention relates to antifriction compositions based on soluble fluoropolymers that can be used to coat surfaces of piston rings, sealing rings, ring gaskets, collars, and other antifriction rubber parts used in friction units of machines in instrument engineering, chemical machinery construction, automobile industry, and aircraft industry. Antifriction composition described in invention comprises soluble tetrafluoroethylene/vinylidene fluoride copolymer, organic solvents: acetone, ethylacetate, cyclohexanone, and amyl acetate, low-molecular weight epoxy dian resin ED-8 or ED-10, amine hardener (product of condensation of formaldehyde and phenol with ethylenediamine AF-2), diluent (ethyl cellosolve), and, additionally, filler: graphite or molybdenum disulfide.

EFFECT: increased wear resistance and durability of rubber sealing members.

2 cl, 3 tbl, 5 ex

FIELD: polymeric materials.

SUBSTANCE: invention relates to polymeric protective materials and can be used for creature of anticorrosive covers. Photohardening composition for cover comprises the following components, mas. p. p.: polysulfide oligomer, 5-10, unsaturated polyester resin, 100-105, and a photoinitiating agent, 3-6. Resin of sort PN-9119 is used as unsaturated polyester resin that represents products of polycondensation of propylene glycol with dimethylterephthalate and maleic anhydride dissolved in styrene (the styrene concentration is 35-45%). Proposed composition provides the high hardening rate to obtain materials showing the high cross-linking frequency and regularity of structure that enhance bending and stretching strength, resistance against corrosion and adhesion properties of the cover.

EFFECT: improved and valuable properties of composition.

2 tbl, 10 ex

FIELD: protective materials.

SUBSTANCE: invention relates to paint and varnish materials applied on surface for anti-corrosive protection of metallic construction and exhibiting large exploitation period. Paint and varnish materials comprise conducting polyethylene as a film-forming substance. Invention provides enhancing effectiveness of anti-corrosive protection of metallic constructions for prolonged exploitation period and enhancing working life of anti-corrosion cover for metallic constructions based on creature the uniform electric potential on a cover surface equal to the potential value of metallic construction to be protected and realization the additional protection effect.

EFFECT: improved and valuable properties of material.

1 tbl

FIELD: cathodic protection of metalwork.

SUBSTANCE: proposed paint-and-varnish material for corrosion protection of metalwork includes electrically conducting film-forming agent (electrically conducting polyethylene) and carbon nanotubes, from 10 to 80% of volume of paint-and-varnish material which increase electric conductivity and resistance to aggressive media and consequently mechanical strength of metalwork. Proposed paint-and-varnish material may additionally contain high-dispersed zinc powder ensuring additional cathodic protection from 40 to 90% of volume of paint-and-varnish material.

EFFECT: enhanced efficiency of corrosion protection of metalwork during protracted period of operation due to smooth electrical potential equal to potential of metalwork being protected.

5 cl, 1 tbl

Coating composition // 2335521

FIELD: chemistry.

SUBSTANCE: composition includes the following component range, weight parts: epoxy diane resine 30.0-60.0; amide-containing acrylic resin 60.0-120.0; polyamine solidifier 15.0-50.0; pigment 22.0-136.0; fillers 57.0-150.0; organic solvent 580.0-900.0. The composition includes condensation products of dimerised fatty acids of vegetable oils with poluethylenepolyamine, as polyamine solidifier. Additionally the composition can contain a mix of dibutylphthalate and tricresylphosphate in amount of 4.4-8.4 weight parts as plasticiser.

EFFECT: improved optic properties of coating; higher hardness, durability, elasticity, burr resistance, light stability, water and heat difference resistance.

5 cl, 2 tbl, 8 ex

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