Polyurethane reactive bicomponent solvent-free systems

FIELD: chemistry of polymers.

SUBSTANCE: invention relates to using polyurethane reactive bicomponent solvent-free composites used for preparing thermostable at temperature below 90°C and compatible with cathode protecting covers. The composite comprises the following components: (A) solvent-free polyhydroxy-component consisting of (A1) 40-100 weight % of simple polyetherpolyol with functionality index ≥ 3.5 and molecular mass 280-1000 Da, or a mixture of some such components, and also (A2) 0-60 weight % of simple polyetherpolyacrylate with from 5.0 to 15 weight % of hydroxyl groups and viscosity index from 300 to 5000 mPa x s at 23°C, and also (A3) 0-60 weight % of other hydroxyl-containing groups of compounds of molecular mass from 32 to 1000 Da and wherein the weight % sum (A1)-(A3) is 100% always, and (B) polyisocyanate component consisting of at least one organic polyisocyanate wherein the equivalent ratio NCO : OH is in the range from 0.8:1 to 1.5:1. Invention provides preparing covers with high permissible prolonged temperature loading below 90°C for protection against corrosion in simultaneous compatibility with cathode protection.

EFFECT: improved and valuable properties of systems.

74 cl, 1 tbl

 

The present invention relates to the application of polyurethane reactive two-component systems that do not contain solvents, coatings, thermally stable at temperatures up to 90°and compatible with cathodic protection.

To protect pipelines necessary coverage with high maximum permissible long-term temperature loads of up to 90°to protect against corrosion while compatibility with cathodic protection.

Modern technology is in the area of Fusion Bonded Epoxid" (molten mass containing epoxide) (FBE)system as primers. When this epoxy powder is applied to the pipe, the heat pipe is melted on the metal surface and react. Such (FBE)-layers maintain cathodic protection under the test ASTM G 42-85 (ASTM = American Society for Testing Materials (American society for testing and materials)while continuous temperature load of up to 60°C. Such primers or covered on top with a thick layer of polyethylene (PE) sintering method or design using system polyurethane foam/adhesive/polyethylene.

The disadvantages of modern technology are:

a) FBE systems do not reach the level of new requirements concerning thermal stability at temperatures above 60°C.

b) FBE system can be applied only to the high financial costs (induction heating requires a large power consumption) when performance is poor.

Therefore, the task underlying the invention is to provide solvent-free liquid primer for corrosion protection of pipes, which

a) have thermal stability to temperatures up to 90°With simultaneous compatibility with cathodic protection

b) can be applied both in the field and in the factory,

in) otverzhdajutsja without the supply of energy,

g) otverzhdajutsja even at temperatures below zero,

d) can be used for pipes and zones of joints of pipes ("Field Joints") and

e) provide high performance.

The subject of the invention is the use of solvent-free reactive two-component polyurethane systems of

A) not containing solvent polyhydroxyalkanoate consisting of

A1) 40-100 wt.% component having a hydroxyl group and containing ether groups with functionality >3.5 and a molecular weight 280-1000 or mixtures of several such components, as well as

A2) 0-60 wt.% simple proliferatoractivated containing hydroxyl group, and

A3) 0-60 wt.% the other connection is to the hydroxyl groups in the molecule, moreover, the sum of the wt.% A1)-A3) is always 100%,

and

B) a polyisocyanate component comprising at least one organic MDI, and the equivalent ratio of NCO:OH is from 0.8:1 to 1.5:1, for the manufacture of thermally stable coatings, resistant to temperatures up to 90°and compatible with cathodic protection.

In the case of component A1)containing a hydroxyl group, it is simple polyaminopropyl that, for example, you can get well-known methods of attaching a cyclic ethers, such as ethylene oxide, propylene oxide, styrene oxide, butylene oxide or tetrahydrofuran to the original compounds, such as polyhydric not containing ether groups, alcohols, aminoalcohols or amines with a molecular weight 280-1000, preferably with a molecular weight of 350-700 and particularly preferably 400-500. The average functionality of the molecules of the parent compounds or their mixtures related to the interaction with cyclic ethers there must be >3,5, better >4. Particularly preferred polyethers, which are built from repeating units of the structure-CH(CH3)CH2O - not less than 50%, better at least 90% (based on the sum of all repeating units.

As a suitable source compounds, polyhydric alcohols should be called: glice is in, trimethylolpropane, butanetriol-1,2,4, hexanetriol-1,2,6, bis(trimethylolpropane), pentaerythritol, mannitol, methylglucose and/or mixtures thereof.

Suitable aminoalcohols are, for example, 2-aminoethanol, diethanolamine, 3-amino-1-propanol, 1-amino-2-propanol, diisopropanolamine, 2-amino-2-hydroxymethyl-1,3-propandiol and/or mixtures thereof.

Suitable polyvalent amines are, in particular, aliphatic or cycloaliphatic amines, such as, for example, Ethylenediamine, 1,2-diaminopropane, 1,3-diaminopropane, 1,4-diaminobutane, 1,3-diamino-2,2-DIMETHYLPROPANE, 4,4-diaminodicyclohexylmethane, ISOPHORONEDIAMINE, hexamethylenediamine were, 1,12-dodecandioic or aromatic amines, such as, for example, isomers of toluenediamine and/or mixtures thereof.

All the described molecules of the parent compounds with functionality >3,5, of course, can only be part of the original mixture. As mixtures of the parent compounds, of course, can also be used a mixture of alcohols, aminoalcohols and/or amines.

Receive available if necessary polyhydroxyalkanoate A2) a mixture of a binder according to the invention can be carried out, for example, in EP-A 825210.

In the case of an alcohol component A3) we are talking about one or more hydroxidealuminum molecular weight 32-1000. Preferably used are n scimolecular hydroxycodone molecular weight 32-350, such as, for example, methanol, ethanol, propanol, butanol, hexanol, 2-ethylhexanol, cyclohexanol, stearyl alcohol, ethylene glycol, diethylene glycol, triethylene glycol, propandiol-1,2 and -1,3, dipropyleneglycol, tripropyleneglycol, butanediol-1,2, -1,3, and -1,4 -2,3, pentanediol-1,5, 3-methylpentanediol-1,5, hexanediol-1,6, 2-ethylhexanediol-1,3, 2-methylpropanol-1,3, 2,2-DIMETHYLPROPANE-1,3, 2-butyl-2-ethylpropane-1,3, 2,2,4-trimethylpentanediol-1,3, octandiol-1,8, macromolecular α-arcangioli with 9-18 carbon atoms, cyclohexanedimethanol, cyclohexanediol, glycerin, trimethylolpropane, butanetriol-1,2,4, hexanetriol-1,2,6, bis(trimethylolpropane), pentaerythritol, mannitol or methylglucose.

If necessary as a component A3) can be known from polyurethane chemistry complex hydroxymaleimide, complex hydroxymaleimide, simple hydroxymaleimide with functionality <3,5, simple policyevaluation, hydroxypolycarboxylic or hydroxyvalerate to molecular weight 1000.

If necessary to polyhydroxyalkanoate A) may be added known in the technology of varnishes stabilizers, such as antioxidants and/or light stabilizers, in order to further improve sitosterol and resistance to the effects of weather; preferably a mixture of a binder to be used without stabilizers.

Approach asimi antioxidants are, for example, steric employed phenols, such as 4-methyl-2,6-decret.-the butylphenol (BHT) or other proposed by the company aIso the Geigy (Ciba Geigy under the name of this class of products Irganox®substituted phenols, thioethers (for example, Irganox PS®, Ciba Geigy) or phosphites (for example, Irgaphos®, Ciba Geigy). Suitable light stabilizers are, for example, HALS-amines (Sitosterolemia employed amines (Hindered Amine Light Stabilizers), as, for example, Tinuvin® 622D or Tinuvin® 765 (aIso the Geigy), and substituted benzotriazole, such as Tinuvin® 234, Tinuvin® 327 or Tinuvin® 571 (aIso the Geigy).

Polyhydroxyamide And consists of 40-100 wt.% from A1), 0-60 wt.% from A2) and 0-60 wt.% from A3). The sum of A1)+A2)+A3) excluding used, if necessary, an antioxidant or sitosterolemia equal 100 wt.%.

In the case of the polyisocyanate component B) in accordance with the present invention we are talking about organic polyisocyanates with an average NCO-functionality of at least 2 and a molecular weight of at least 140. Well suited primarily (i) is not modified organic polyisocyanates with a molecular weight lying in the range 140-300, (ii) the lacquer polyisocyanates with a molecular weight of 300-1000, and (iii) present in the group of urethanes NCO-prepolymers with molecular weight more than 1000 or a mixture of (i)-(iii).

Examples of polyisocyanates group (i) are 1,4-diisocyante obatan, 1,6-diisocyanatohexane (HDI), 1,5-diisocyanato-2,2-dimethylpentane, 2,2,4 - or 2,4,4-trimethyl-1,6-diisocyanatohexane, 1-isocyanato-3,3,5-trimethyl-5-scentometer-cyclohexane (IPDI), 1-isocyanato-1-methyl-4-(3)-isocyanatomethyl-cyclohexane, bis-(4-isocyanatophenyl)methane, 1,10-diisocyanatobutane, 1,12-diisocyanatobutane, cyclohexane-1,3 - and -1,4-diisocyanate, isomers xylylenediisocyanate, 2,4-diisocyanate or mixtures thereof with 2,6-diisocyanatomethyl with the content of 2,6-diisocyanatomethyl mainly in the calculation of the mixture to 35 wt.%, 2,21-, 2,41-, 4,4'-diisocyanatobutane or technical mixtures of polyisocyanates diphenylmethane series or any mixtures of the aforementioned isocyanates. Preferably used are the polyisocyanates diphenylmethane series, particularly preferably as a mixture of isomers.

The MDI group (ii) are known in themselves, do not contain solvent lacquer polyisocyanates. The term "lacquer polyisocyanates" should be understood in the framework of the invention compounds or mixtures of compounds which are obtained by the known reaction of oligomerization simple diisocyanates of the type, for example, mentioned under (i).

Suitable oligomerization reactions are, for example, the reaction of alienatingly, buritizal, carbodiimides, cyclization, dimerization, formation of urea, tramarital and/or oreanization. Often when "oligomerization" leaky several of these reactions simultaneously or sequentially one after another.

In the case of "lacquer polyisocyanates", preferably it is about the polyisocyanates with the structure of uretdione, isocyanurate, allophanate, biureta, iminoimidazolidine and/or oxidization.

Getting this kind of lacquer polyisocyanates is known and described, for example, in DE-A 1 595 273, DE-A 3 700 209, DE-A 3 900 053 or EP-A-0 330 966, EP-A 0 259 233, EP-A 0 377 177, EP-A 0 496 208, EP-A 0 524 501 or US-A4385 171.

In the case described above lacquer polyisocyanates with urethane groups we are talking about prepolymers having isocyanate groups, which can be obtained by the interaction of low and high molecular polyhydroxylated compounds with excess amounts of the above-mentioned di - or polyisocyanates or with a large excess of the mentioned di - and polyisocyanates and the subsequent removal of excess MDI, for example, by the method of thin-film distillation. Getting prepolymers takes place in General at temperatures 40-140°With, if necessary with simultaneous use of suitable catalysts.

To obtain such prepolymers suitable low molecular weight polyhydroxylated compounds with molecular weights of 62 to 299, such as, for example, ethylene glycol, propylene glycol-1,3, bulandi the l-1,4, hexanediol-1,6, neopentylglycol, 2-ethyl-hexanediol-1,3, glycerol, trimethylolpropane, pentaerythritol containing hydroxyl groups, low molecular weight esters of such polyols with dicarboxylic acids of the following named type or a low molecular weight products amoxilonline or propoxycarbonyl this kind of simple polyols or any mixtures of such modified or not modified alcohols.

The MDI group (iii) are known in themselves prepolymers having isocyanate groups on the basis of simple diisocyanates (i) about the above-mentioned type and/or based lacquer polyisocyanates (ii), on the one hand, and organic polyhydroxylated compounds with molecular weight greater than 300, on the other hand.

The MDI group (iii) are predominantly high molecular weight prepolymers polyhydroxylated compounds with molecular weights in the range from 300 to 20,000, better from 1000 to 8000, known in itself from polyurethane chemistry.

High-molecular polyhydroxylated compounds to obtain prepolymers are, for example, made appropriate instructions esters of polyols on the basis of simple low-molecular alcohols mentioned type and polybasic carboxylic acids, such as adipic, sabotinova, phthalic, softala is, tetrahydrophtalic, hexahydrophthalic, maleic acid; anhydrides of these acids, or any mixtures of such acids or anhydrides.

Also suitable for the production of prepolymers or polypropolene are the corresponding instructions polylactones having in the molecule a hydroxyl group, in particular, poly-ε-caprolactone.

To obtain prepolymers having isocyanate groups are also suitable, appropriate above the ordinary preferability, which are obtained by known methods of alkoxysilane appropriate starting compounds. Suitable parent compounds are, for example, as mentioned above, simple polyols, water, organic polyamine at least two N-H bonds or any mixture of such starting compounds. Suitable for reaction alkoxysilane acceleratedly, in particular ethylene oxide and/or propylene oxide, which can be used in any sequence or in mixture with the reaction alkoxysilane.

Also polyethers of polytetramethylene corresponding to the aforementioned instructions, such as available known methods by cathodic polymerization of tetrahydrofuran, suitable for the production of prepolymers.

In addition, to obtain prepolymers suitable polycarbonates, have the appropriate hydroxyl group and match the above statements, which can be obtained, for example, by the interaction of simple diols of the above type with dellcorporate, such as, for example, diphenylcarbonate, or phosgene.

Further, suitable for the production of prepolymers having NCO-groups are politieverhoor, which can be obtained, for example, by polycondensation of thioglycolate with yourself or with dialami and/or polyols named type.

In addition, suitable polyacetate, such as, for example, condensation products of formaldehyde and diols or polyols of the above mentioned type, which can be obtained using acidic catalysts, such as phosphoric acid or p-toluensulfonate. Needless to say, can be used to obtain prepolymers well as mixtures mentioned as examples of hydroxyl compounds.

To obtain a binder according to this invention, components a) and b) are mixed in such proportions that the equivalent ratio of NCO:OH of from 0.8:1 to 1.5:1, better from 0.9:1 to 1.3:1.

If necessary, mixed with the usual auxiliary and additional substances from the coating. These include, for example, tools that facilitate the spreading of controlling the viscosity additives, pigments, fillers, matting tools, UV stabilizers, anti Sidency, as well as catalysts for the reaction of "matching". These compounds are typically added to the component (A) before mixing components a) and b) and mixed with them. Due to the use according to the invention is thermostable reactive two-component polyurethane system containing no solvent, and auxiliary and additive substances named type can protect any metal substrates even under the condition of cathodic protection and long-term thermal loads temperatures from 30 to 90°C.

In the case of metal substrates, preferably it is about, for example, sheet pile walls, gateways, ships, pipes and other metal objects in the sea region, as well as coastal and terrestrial areas.

Particularly suitable above-described binder to protect pipes and pipes with cathodic protection, even under prolonged thermal stress temperatures up to 90°C.

Examples

Rubbing solvent free two-component polyurethane systems have been using a vacuum mixer. The system was nubilalis always on the thickness of the layer 700-1200 μm irradiated on SA 2 1/2 steel sheet thickness of 3 mm by setting airless spray 2K. After one week of incubation under laboratory conditions, the system was tested for compatibility with cathodic protection (CD).

Test condition:Wednesday:5%NaCl solution
- temperature:80°
- voltage:uh=-1260 mV
- duration:requirement=28 days
Evaluation criteria:- the appearance of the layer (under layer)
- constancy of consumption
- corrosion under layer after performing scratches: <10 mm

Table
Note 1 (part)2 (parts)Prim (parts)Prim (parts)
Component 1
Desmophen® 405 1B (Bayer)22,7was 12.7573,84to 45.4
Desmophen® VP LS 2285 (Bayer)-was 12.75-to 45.4
1,4-Butanediol (Bayer)--14.4V6,92
Baylith® L-paste (Powder)of 5.4of 5.421,621,6
Anti-Terra 204 (Byk Chemie)0,40,41,61,6
Hardener DT (Bayer AG)0,40,41,61,6
Crayvallac® Super (Langer and Co)0,40,41,61,6
Talc BC-standard(Naicha rivers Mineralische)--22,422,4
Naitsch® SU, Standard(Naicha rivers Mineralische)5,65,6--
Plastorit® Naintsch 0(Naicha rivers Mineralische)7,77,730,830,8
Heavy spar EWO (Sachtleben)18,918,975,675,6
Bayertitan® R-KB-4 (Leverkusen)3,73,7--
Tronox® R-KB-4 (Kerr McGee)--14,814,8
Component 2ÈA;
Desmodur® VL (Bayer)32,0527,5128,2128,2
CD test (80°C)
Layer thickness (μm)1050840730780
Duration (days)29292828
Assessment
Consumption current (start) (mA)12,614,52532
Flow rate after 20 days (mA)22,51718,533,5
Consumption current (end) (mA)22191537,5
The appearance of the filmnononono
(breaking the surface)
Corrosion under layer after performing0-10-1 00
scratches from artificial (mm)
damage [ASTM G 42-85]

Deciphering the chemical names of the components of the commercial products listed in the table.

Desmophen® 4051B

polyetherpolyols (initial connection - Ethylenediamine), IT-number=470;

Desmophen® VP LS 2285

polyacrylate resin:

content-IT is 7.4%,

viscosity at 23°S: 1.800 MPa·C

(62% polyetherpolyols (source connection trimethylolpropane) with HE-number = 385, polyacrylate component contains 2-ethylhexyl-acrylate and styrene in a ratio of 77/23 and hydroxyethylmethacrylate);

Baylith® L-pasta

aminosilicone water retention agent, zeolite;

Anti-Terra 204

wetting and dispersing additive based polyaminoamide salt against Oceania, deposition and leaching of organic and inorganic pigments;

Hardener DT

diethyltoluenediamine:

the mixture 74-80 weight.-% 3,5-diethyltoluene-2,4-diamine and 18-24 wt.-% 3,5-diethyltoluene-2,6-diamine with a maximum of 1 wt.-%2,4,6-treatinent-1,3-diamine and maximum 4 wt.-% other polyalkyl-m-phenylendiamine;

Crayvallac® Super

thickening agent-based AMI the aqueous wax,

Templ: 120-130°C, density: 0,98 g/cm3,

the distribution of particle size (unit: "Maivern Mastersizer S laser particle size analyser", method: Cray Valley 1.6.1.5):

DV 1 min = 1,8 μm, DV 9 max = 15,0 µm;

Talc BC-standardTalc (hydrated layered silicate of Mg3Si4O10(OH)2);
Naitsch® SU, Standardthe filler of 15% talc and 85% dolomite (SiO2: 10%, MgO: 24%, Al2O3: 0,2%, Fe2O3: 0,5%, CaO: 24%)
(weight loss on ignition at 1050°S: 41%, moisture (105°≤0,5%BETH: 4 m2/g);
Plastorit® Naintsch 0the filler of the 47% of talc, 52% chlorite, 1% dolomite (SiO2: 47%, MgO: 31%, Al2About3: 10%, Fe2O3: 1,5%, CaO:1%)
weight loss during annealing at 1050°S: 9,1%, moisture (105°)<0.5%, a BET: 3.4 m2/g;
Heavy spar EWOthe filler of white superfine natural barium sulphate:
BaSO4about 93%, SiO2- about 6%,
the oil absorption of about 11,
density of about 4.2 g/ml
hardness on the Mohs scale 3-4;
Bayertitan® R-KB-4white pigment based on TiO2rutile;
Tronox® R-KB-4white pigment based on TiO2rutile;
Desmodur® VLaromatic, nesadurai solvent polyisocyanate based diphenylmethanediisocyanate, isocyanate content: 31,5±0.5%, and the viscosity at 25°S: 90±20 MPa·C density at 20°With: about 1.24 g/ml

1. Composition to obtain thermally stable and compatible with cathodic protection coatings including solvent-reactive two-component polyurethane system, characterized in that the reactive system consists of

A) solvent polyhydroxyalkanoate consisting of

A1) 40-100 wt.% simple polyetherpolyols with functionality ≥, a 3.5 and a molecular weight 280-1000 or mixtures of several such components, as well as

A2) 0-60 wt.% simple proliferatoractivated from 5.0 to 15 wt.% hydroxyl groups and a viscosity at 23°from 300 to 5000 MPa·and

A3) 0-60 wt.% other containing hydroxyl group of compounds with a molecular weight of from 32 to 1000, and the sum of the wt.% A1)-A3) is always equal to 100%, and

B) a polyisocyanate component comprising at least one organic MDI, and equivalent sootnoshenie the NCO:OH is in the range from 0.8:1 to 1.5:1.

2. The composition according to claim 1, characterized in that it contains a reactive two-component polyurethane system, which has an equivalent ratio of NCO:OH of from 0.9:1 to 1.3:1.

3. The composition according to claim 1, characterized in that it contains a reactive two-component polyurethane system, which has a molecular weight of component A1) is 350-700.

4. The composition according to claim 1, characterized in that it contains a reactive two-component polyurethane system, in which the functionality of the component A1)≥4.

5. The composition according to claim 1, characterized in that it contains a reactive two-component polyurethane system, which has a molecular weight of component A3) lies in the range from 32 to 350.

6. The composition according to claim 1, characterized in that it contains a reactive two-component polyurethane system, which in the case of component B) we are talking about aromatic organic polyisocyanate.

7. The composition according to claim 1, characterized in that it to obtain a coating is applied, if necessary, on metal substrates with cathodic protection.

8. The composition according to claims 1 and 7, characterized in that it is used to produce coatings on sheet pile walls, gateways, ships, pipes and other metal objects in marine environments, coastal and terrestrial areas.



 

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4 ex

FIELD: protective coatings.

SUBSTANCE: invention aim is preparation of coatings providing long-term protection of chemical shop equipment under alternate alkali and acid solution action conditions. Protection of equipment, according to invention, is provided by polysulfide sealant having prolonged durability owing to lowered permeability and swelling ability of cured coating material on contact with water and aqueous acid and alkali solutions. Coating is formed by consecutively depositing curable primer and transition adhesive layer onto cleaned metal followed by layer-by-layer application and curing of polysulfide sealant. On the surface of cured coating, additional anti-diffusion polymeric layer based on chlorinated polyvinylchloride resin is formed.

EFFECT: achieved long-term protection of equipment.

FIELD: polymeric materials.

SUBSTANCE: abrasive-resistant composition material is made of composition comprising the following ratio of components, wt.-%: functional additives, 40-45; thermoplastic modifying agent, 28.14-43.5; hardening agent, 1-2; epoxy resin E-41, E-41r, the balance. Mixture of thermoplastic chlorine-containing modifying agent - perchlorovinyl resin and thermoplastic polymer taken in the ratio = (1:0.5)-(1:0.005) is used as a thermoplastic modifying agent. Thermoplastic polymer is taken among the following group: polystyrene, acryl-butadiene-styrene plastic, polyamide, polyethylene, polypropylene, copolymer of ethylene and vinyl acetate. Invention provides enhancing the adhesion strength and stability to abrasive wearing, among them, in effect of sign-variable and impact loadings and vibrations. Invention can be used in machine engineering for making functional coverings preventing wear of articles, constructions or aggregates as result of effect of abrasive and corrosive media, impact loadings and vibrations.

EFFECT: improved and valuable properties of material.

2 tbl, 13 ex

FIELD: varnish-and-paint industry.

SUBSTANCE: invention relates to lacquer materials for primer coating as well as independent coating. Water-dispersed lacquer composition includes acrylate-containing dispersion, pigments, including structure chromate and zinc phosphate at ratio 1:(10-50), polyurethane and cellulose and/or acrylic thickener, surfactant, coalescent additive, corrosion inhibitor, water, and fluorine-containing flow property-enhancing additive. Composition may further contain neutralizer, form suppressor, and antifreeze.

EFFECT: increased adhesion for aluminum and water resistance, speeded up drying under environmental conditions.

4 cl, 2 tbl, 7 ex

FIELD: polymers, in particular heat resistant anticorrosive coating composition.

SUBSTANCE: claimed composition contains (mass %) polyphenyl siloxane polymer 20-30; butylmethacrylate-methacrylic acid copolymet 4-8; heat resistant pigment 8-10; potassium alumosilicate 3-10; microreinforcing filler (wollastonite) 2.5-8; rheological additive 0.5-2.0 and balance: organic solvent.

EFFECT: heat resistant anticorrosive coats useful in protection of metal surface from elevated temperature and aggressive media.

2 tbl

FIELD: polymers.

SUBSTANCE: invention relates to a method for preparing abrasion-resistant protective polymeric composition. The composition comprises the following components, mas. p. p.: epoxydiane resin, 100; modifying agent, 30-60; organosilicon amine hardening agent, 10-20; scaly filling agent, 40-80; aerosil and/or microtalc, 10-20 as a finely divided filling agent. Resins ED-18, ED-20 and E-41 are used as epoxydiane resin. Low-molecular butadiene-nitrile rubber or polysulfide rubber, or acrylic resin is used as a modifying agent. Organosilicon amine hardening agent represents aminosilane or aminosiloxane that is used in common with polyethylene polyamine in their mass ratio = 1:1. The condensation product of polyethylene polyamine with trimerized fatty acid from flax or tall oil can be added to the hardening agent composition. Scaly silicon representing waste in manufacture of crystalline silicon for preparing organosilicon compounds is used as a scaly filling agent. Pigments can be added to the composition for coloring. Invention provides preparing the composition showing high adhesion to metals, for example, to steel and to concrete, high mechanical strength, elasticity, abrasion-resistance, atmosphere-resistance, resistance to hot water effect and longevity. Proposed polymeric composition can be used for protection of metallic and concrete constructions, for floor covering and so on.

EFFECT: improved and valuable properties of composition.

6 cl, 2 tbl, 13 ex

FIELD: corrosion protection.

SUBSTANCE: invention is designed for use in oil and gas industry, mechanical engineering, in particular to protect internal surfaces of steel fuel tanks and mains, wherein all kinds of petroleum products or various organic solvents can be present. Composition contains 55-35 vol % pre-polymerized polyurethane based on tolylenediisocyanate and diethylene glycol, 35-55 vol % polytrifluorochloroethylene, and 5-10 vol % aluminum powder with particle size no larger than 20 μm.

EFFECT: achieved heat resistance of anticorrosive coating within a working temperature range ±50°C and protective properties of coating when surfaces are treated with steam at 150°C and pressure up to 6 atm.

2 ex

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