Anti-corrosion water-dispersion primer-enamel paint

FIELD: priming compositions for protection of metal surfaces working under atmospheric conditions against corrosion; application of primers and coats.

SUBSTANCE: proposed primer-enamel paint includes the following components, mass-%: 40.0-60.0 of epoxy diane resin,; 5.0-15.0 of 50-% polyvinyl acetate dispersion and 0.2-2.0 of synthetic oligopiperylene rubber used as film-forming agents, 0.03-0.1 of polyoxyethylene alkyl phenol ester used as surfactant; 2.0-5.0 of chromium (III) oxide, as well as 2.0-5.0 of aluminum hydroxide and 2.0-5.0 of cardinal red used as anti-corrosion pigments, 8.0-12.0 of polyethylene polyamine used as hardening agent, 0.3-0.7 of dibutyl phthalate used as plasticizing agent, 1.0-10.0 of butyl cellosolve used as cosolvent, 0.01-1.0 of orhto-phosphoric acid used as modifying additive, water, up to 100.

EFFECT: improved quality of coat; enhanced resistance to oils, gasoline, lubricating and cooling fluids and aggressive media.

2 tbl, 16 ex

 

The invention relates to paints, varnishes and lacquers based on epoxy resins, namely, primers, anti-corrosive water-dispersed compositions intended for the protection against corrosion of metal surfaces, operating in atmospheric conditions; can be used as a primer, and as an independent floor.

Famous songs of similar purpose, with high physical-mechanical properties, which include this a polymer base, organic solvent, various modifying additives, including solids (Reibman A.I. Protective coatings, M.: Chemistry, 1982, p.51-52). However, when curing polyethylenepolyamine get brittle coating, which lack the protective ability, which makes them widely used for coating of metal structures and equipment.

Known composition of the primer coating to protect steel structures from corrosion (Patent No. 2187524, 09D 5/12, 163/02), consisting of (mass):

Epoxy resin ED-20- 9,0-11,0
Liquid butadiene carboxyl-nitrile rubber SKN-26-1A- 2,0-3,0
Toluene- 30,0-32,0
The polyethylenepolyamineand 1.5 - 2.5
Oxide chromium (III)- 3.5 to 4.5
The zinc phosphate- 9,0-12,0
Talc- 10,0-12,0

The disadvantage of this composition is the use of flammable organic solvent.

Known ground-enamel water-based anticorrosive series " ronakril" (Patent No. 2223996, 09D 5/12), comprising (wt.%) acrylic dispersion 30-50, tinting paste 1-10, a dispersant 0.1 to 1.0, the thickener of 0.05-0.2 and water, crowns calcium phosphate 0.1 to 20 as an anticorrosive pigment. The disadvantage of this structure is that it cannot be applied directly onto rusty surfaces and requires pre-Stripping, which is associated with considerable effort.

Known primer for corrosion-resistant coating (Patent No. 2049800, 09D 5/12), containing (wt.%):

Epoxy resin- 16,0-26,6
The polyethylenepolyamineto 3.2 and 6.6
Slaked lime- 30,0-31,3
10% aqueous solution of potassium methyl siliconate- to 1.0-1.1
Polyvinyl chloride- 2,8-4,0
The dioctylphthalate- 1,8-2,6
3%aqueous solution of methylcellulose- rest

<> The disadvantages are time-consuming way of priming, low external quality of the obtained coatings when used as the primary coating material, small vitality of the composition.

Closest to the claimed invention by the combination of features is a water-dispersion paint composition (Patent No. 2154079, 09D 5/02), containing (wt.%):

Waterborne binder (in terms of dry substance)- 15,0-40,0
Emulsion epoxy
(in terms of dry substance)- 1,0-15,0
Pigments- a 2.0 to 40.0
Surfactant- 0,2-3,0
Biocidal additive- 0,01-0,5
Thickener- 0,1-5,0
Corrosion inhibitor- 0,1-1,6
Cholesterola additive- 3,0-10,0
Water- rest

The disadvantages of this part are-low-tech and labour-intensive method of preparation of the paint composition, of low quality of the obtained coatings when used in aggressive environments, insufficient, compared with the proposed structure, the resistance of the effects of coolant, gasoline and mineral oil.

The aim of the invention is the creation of technologically advanced in the preparation of compositions which can convert existing on the processing surface corrosion products, to protect the surface from the formation of new rust (primer); to form on the surface of the protective and decorative coating with good external qualities (enamel) and effectively protect the surface from exposure to oils, gasoline, coolant and aggressive environments.

This ground-enamel against corrosion bears a double burden: acts as passivator metal from further corrosion and serves as a primer, creating a brilliant decorative surface.

The presence of water in the recipe ground-enamel gives the possibility to apply it to wet the metal surface, while its drying time is not increased.

The result is achieved that the ground-enamel containing epoxy resin ED-20 as a foaming agent, polyoxyethylene the alkylphenol ether as a surfactant, anti-corrosion pigment red iron oxide and water, and further comprises, as additional film-forming agents in 50%polyvinyl acetate dispersion and synthetic rubber oligophenylenes; as a plasticizer - d is butylphthalate; as anticorrosive pigments oxide chromium (III), aluminium hydroxide; as modifying additives - phosphoric acid; as a co-solvent - butylcellosolve and as a hardener - polyethylenepolyamine in the following ratio of components (wt.%):

Epoxy resin ED-20- 10,0-60,0
50%polyvinyl acetate dispersion brands DN, DS, D- 5,0-15,0
The synthetic rubber oligophenylenes marks 3- 0,2-2,0
Polyoxyethylene ether of alkylphenol- 0,003-a 0.1
Oxide of chromium (III)- 2,0-5,0
Aluminium hydroxide- 2,0-5,0
Pigment red iron oxide- 2,0-5,0
Butylcellosolve- 1,0-10,0
Dibutyl- 0,3-0,7
Phosphoric acid- 0,01-1,0
The polyethylenepolyamine- 8,0-12,0
Waterup to 100

As the binders used epoxy resin ED-20 (GOST 10587-93), 50%polyvinyl acetate homopolymer dispersion coarse grades DN, DS, DV (GOST 18992-80) and synthetic rubber oligomer alenby (SCOP) grade 3 (TU 38.103542-89).

As anticorrosive pigments used pigment red iron oxide (TU 6-10-602-86), chromium oxide (III) (GOST 2912-79) and aluminium hydroxide (TU 1711-045-00196368-93).

As surface-active substances are used ethoxylated ALKYLPHENOLS - excipient OP-7 or OP-10 (GOST 8433-81).

As the plasticizer using dibutyl phthalate (GOST 8728-77).

As the hardener used polyethylenepolyamine (TU 6-02-594-85).

As modifying additives use of orthophosphoric acid (GOST 10678-76).

As a co-solvent use butylcellosolve (TU 6-01-222-68).

The proposed composition differs from the prototype in that it contains as an additional agent in 50%polyvinyl acetate dispersion, modified phosphoric acid, which serves as the basis for primer coating and allow to relate the corrosion products in inactive complexes, as well as the foaming agent is a synthetic rubber oligophenylenes improving the water resistance of the coating and resistance to petroleum products (gasoline, oil, and others). As anticorrosive pigments used chromium oxide and aluminium hydroxide, which under the action of moisture and oxidizing agents have pestiviruses and protective action on the metal surface. As a co-solvent composition contains is of butylcellosolve, legohaulic with water; polyethylenepolyamine is a hardener system.

The ground-enamel is prepared based on the following technologies:

1. Modification of polyvinyl acetate dispersions

Modification of 50%polyvinyl acetate dispersion by mixing with phosphoric acid for 2 hours and then adding dibutyl phthalate at a temperature of 35-40°With up to a complete matching products.

2. Preparation of pigment paste

Preparation of pigment paste is made by mechanical mixing of water with the following components: polyoxyethylene ether of alkylphenol (auxiliary substance OP-7 or OP-10), chromium oxide (III), aluminum hydroxide, pigment red iron oxide, butylcellosolve. The resulting mixture fray of the bead mill to achieve the degree of milling (device "Grindometer") 30 Šm.

3. Preparation of the soil

Manufacturer of soil is carried out by mechanical mixing of pigment paste, butylcellosolve, polyethylenepolyamine, modified polyvinyl acetate dispersions, synthetic rubber oligophenylenes.

4. Preparation of enamel

Preparation of enamel is a mixture of epoxy resin ED-20 and butylcellosolve.

5. Cooking primer-enamel

Manufacturing ground-enamel deposition is designed on the place of work and by mixing the soil and enamel in a mass ratio of 1:1 or 2:3, respectively.

Example

Modification of polyvinyl acetate dispersions is carried out by introducing into 8,566 parts of a 50%polyvinyl acetate dispersions of 0.004 parts of orthophosphoric acid and stirring for 2 hours. Adding to the mixture of 0.43 parts of dibutyl phthalate and mixing at a temperature of 35-40°spend at least 3 hours.

For the preparation of pigment paste of 0.003 parts OP-10 is introduced into 14,097 parts of water and stirred for 0.3 hours. Then successively add 3,44 parts of chromium oxide (III), 3,44 parts of aluminium hydroxide, 3,44 parts of pigment red iron oxide and 0.68 parts of butylcellosolve. Then pigmentary paste fray in a bead mill to achieve the degree of milling (device "Grindometer") 25-30 microns.

Manufacturer of soil by mechanical mixing of 25.1 parts of the pigment paste of 2.9 parts of butylcellosolve, 11,0 parts polyethylenepolyamine, 9,0 parts of the modified polyvinyl acetate dispersions, and 2.0 parts of synthetic rubber oligophenylenes for at least 20 minutes.

For the preparation of enamel 46,5 parts epoxy resin ED-20 is mixed with 3.5 parts of butylcellosolve until smooth.

To obtain the ground-enamel 50,0 parts soil mix with a 50.0 parts of enamel for 20 minutes.

The technology of obtaining ground-enamel all the same; the ratio of the com is onenew are shown in table 1. For comparative tests of the used part of the famous water-dispersion paint composition (composition 1).

The quality indicators soil-enamel in comparison with the prototype are shown in table 2.

The tests were performed on plates of steel grade GOST 380-94 3 size 70×150 mm, covered with a uniform layer of corrosion products obtained under conditions of aggressive plants. Before applying the primer-enamel plates were cleaned from the reservoir and loose rust with the subsequent degreasing solvent (acetone according to GOST 2768-84, white spirit according to GOST 3134-78). To determine the drying time of the primer-enamel was applied in a single layer; to identify other indicators of ground-enamel was applied in two layers. Before the test coatings for resistance to aggressive environments prepared samples was kept at a temperature of (20±2)°C and relative humidity (65±5)% for at least 5 days.

The analysis of the prototype and the above compositions to aggressive environments were carried out in accordance with GOST 9.403-80, method And at a temperature of (20±2)°C. After testing noted the condition of the appearance of the surface coating and the presence of subsurface corrosion.

For tests used fluid lubricant-coolant Mr-11-PAVEX on WAX-95. The rest of the environment taken for testing, see P is ilozhenii 1 GOST 9.403-80.

Define the time of drying was carried out according to GOST 19007-73, grade 3. Determination of adhesion was carried out according to GOST 15140-78, method 2.

The elasticity determination was carried out according to GOST 6806-73 on the rods with a diameter of 1 and 2 mm

Determination of the resistance of coatings to the effects of climatic factors was performed at the stand atmosphericconditions station operating conditions U1 according to GOST 9.104-79, atmosphere type II (industrial) according to GOST 15150-69 within 30 days.

At the end of the trials monitored surface condition of the metal under the coating destructive way with a visual assessment of the presence of sub pellicle corrosion under a magnifying glass, with an increase of 10xaccording to GOST 25706-83.

As can be seen from table 2, when using components in the recommended formula of the invention the composition exceeds the prototype for resistance to aggressive media (2%-aqueous solution of hydrochloric acid, 10%sodium hydroxide solution), coolant, gasoline, mineral oil, weather (examples 1-5).

The reduction in the content of polyvinyl acetate dispersion with respect to the lower limit recommended by the claims, leads to deterioration of adhesion and elasticity of the coating; and its increase with respect to the upper limit recommended by the claims, is to increase the drying time of the coating, the ear is increased adhesion and elasticity of the coating, reducing its protective properties when exposed to a 20%aqueous solution of sodium chloride in atmospheric conditions (examples 6 and 8).

The increase in the content of epoxy resin ED-20 relative to the upper limit recommended by the claims, increases the drying time of the coating, a deterioration in adhesion and elasticity, resistance to the effects of a 20%aqueous solution of sodium chloride (example 7); and a decrease relative to the lower limit recommended by the claims, - deterioration of protective coating properties: resistance to aggressive environments, coolant, gasoline, mineral oils and atmospheric conditions (example 9).

The increase in the content of butylcellosolve relative to the upper limit recommended by the claims, increases the drying time of the coating, the deterioration of its resistance to coolant, 10%caustic soda, 20%-aqueous solution of sodium chloride, 2%-aqueous solution of hydrochloric acid; degradation of adhesion and elasticity of the coating, its protective properties in atmospheric conditions (example 10), and the reduction in the content of butylcellosolve relatively lower limit recommended by the claims, results in a dense-low-tech mass (example 11).

The reduction in the content of the Osprey is otnositelno lower limit, the recommended formula of the invention, leads to deterioration of durability of the coating to the cutting fluid, a 10%increase sodium hydroxide solution, 20%of the resultant solution of sodium chloride, 2%increase hydrochloric acid solution, deterioration of adhesion and elasticity of the coating, its protective properties in atmospheric conditions (example 12); and the increase of its content relative to the upper limit recommended by the claims, leads to deterioration of drying (example 15).

Altering the contents of polyethylenepolyamine as upwards and towards its reduction with respect to the limits recommended by the claims, increases the drying time of the coating (examples 13, 14).

The results obtained indicate that the proposed composition of the ground-enamel provides coatings having higher mechanical and protective properties than the prototype.

Table 1

Compositions compositions
Name of the componentNDExamples of formulations
The placeholder123456789 101112131415
123456789101112131415161718
Epoxy resin ED-20GOST 10587-935,046,540,060,046,555,050,062,040,039,046,046,5a 50.546,546,546,5
Alkylsulfate sodiumTHE 2481-007-131-644-01-930,5---------------
Dispersion of acrylic Lakel 43NGO "Grimprel"40,0----------- ----
Pigment red iron oxideTHE 6-10-602-867,53,43,43,44,53,43,52,05,03,53,55,51,53,43,43,4
Excipient OP-10GOST 8433-810,10,10,0030,0030,10,0050,010,100,0070,0030,10,0050,10,010,0050,003
Ethylene glycolGOST 19710-833,5---------------
Sodium nitriteGOST 19906-740,1------------ ---
Lakel 41THE 2241-008-39251899-695,0---------------
Liquid polymethylsiloxane PMS-100,GOST 13032-770,1---------------
PMS-200,
PMS-200AOST 6-02-20
Thiuram DGOST 740-760,1---------------
Drinking waterGOST R 51232-9838,116,0631,6572,1579,456,84513,0721,9717,39327,997was 12.7516,35520,3814,1519,65513,857
The polyethylenepolyamineTHE 6-02-594-85-11,08,0to 12.011,010,011,5to 12.08,08,011,011,011,013,07,511,0
Oxide of chromiumGOST 2912-79-3,43,43,44,53,43,52,05,03,53,55,51,5 3,43,4
Aluminium hydroxideTHE 1711-045-00196368-93-3,43,43,44,53,43,52,05,03,53,55,51,53,43,43,4
Dispersion of polyvinyl acetate homopolymer coarse brand

D 51
GOST 18992-808,58,55,010,010,04,05,016,0to 12.08,08,54,08,58,58,5
ButylcellosolveTHE 6-01-222-68-7,01,010,07,06,010,0to 12.02,01,011,00,59,07,07,07,0
Acid orthopaedicaGOST 10678-76-0,040,040,040,050,050,0180,031,1 1,00,050,040,020,040,040,04
DibutylGOST 8728-88-0,40,40,40,40,40,70,70,30,30,40,40,40,40,40,4
The synthetic rubber oligophenylenesTHE 38.103542-89-0,20,20,22,01,50,20,20,20,20,20,20,10,20,22,5

Table 2

Quality formulations
Examples of formulationsThe resistance to aggressive mediaDrying time to degree 3, hThe adhesion scoreElasticity in bending, mmResistance to weathering
SOG10%NaOH solution20%-n is th NaCl 2%HClGasolineMineral oil
To a dry surfaceTo wet the surface
123456789101112
The placeholder25 h - minor softening and whitening of the coating; corrosion absent8 h - whitening of the coating; corrosion absent24 hours - a slight whitening of the coating; corrosion absent0.5 h in the place of contact of the swelling, whitening of the coating; corrosion absent6 days-softening of the coating; corrosion absent32 day - softening of the coating; corrosion absent3111The presence of foci of corrosion
170 h - a slight whitening of the coating; corrosion absent8 hours - no change26 h - a slight whitening of the coating; corrosion absent0.5 h in the place of contact of the coating changed color; corrosion absent21 days - the darkening of the coating; corrosion absent35 days - without of the of eneny; corrosion is missing20111The surface under the coating without corrosion
2100 h - a slight whitening of the coating; corrosion absent8 hours - no change25 h - a slight whitening of the coating; corrosion absent1 h - minor discoloration of the coating; corrosion absent26 days - the darkening of the coating; corrosion absentThe same16111The same
360 h - a slight whitening of the coating; corrosion absent10 hours - no change24 h - whitening of the coating; corrosion absent1 h - minor discoloration of the coating; corrosion absentThe sameThe same19111The same
4120 h without changingThe sameThe same1 h - minor discoloration of the coating at the site of contact; no corrosionThe sameThe same17111The same
5 120 h without changingThe same24 hours - a slight whitening of the coating; corrosion absentThe sameThe sameThe same20111The same
6120 h without changingThe sameThe sameThe sameThe sameThe same24222The same
7100 h - whitening of the coating; corrosion absent10 h - whitening of the coating; corrosion absent10 hours - no change1 h - slight swelling of the coating; corrosion absent36 days - the darkening of the coating; corrosion absentThe same29212The same
8120 h without changing10 hours - no change10 h - slight whitening of the coating;1 h in the place of contact of the coating changed color;The sameThe same28222Corrosion
corrosion is missing corrosion is missing
930 h - whitening of the coating; corrosion absent8 h - whitening of the coating; corrosion absentThe same1 h - at the site of contact bloating. Corrosion20 days - the darkening of the coating; corrosion absent26 days - the darkening of the coating; corrosion absent16111The presence of small foci of corrosion
10The sameThe sameThe same1 h in the place of contact of the coating changed color. CorrosionThe same35 days - no change25222The same
11The mass of the dense-low-tech
1230 h - significant8 h - coating significantly8 h - whitening of the coating;1 h - contact coating26 days - the darkening of the coating;35 days - no change;20221-2The same
discoloration of the coating; corrosion absentchanged the color of the coating; corrosion absentcorrosion is missingchanged color; corrosion absentcorrosion is missingcorrosion is missing
13Does not dry
14Does not dry
15Does not dry

The ground-enamel corrosion water dispersion comprising epoxy resin ED-20 as a foaming agent, polyoxyethylene ether of alkylphenol as surfactants, corrosion is pigment red iron oxide, water, characterized in that as a foaming agent additionally contains 50%polyvinyl acetate dispersion and synthetic rubber oligophenylenes, as anticorrosive pigment further comprises chromium oxide (III) and aluminium hydroxide, and optionally contains a polyethylenepolyamine as a hardener, dibutyl phthalate as a plasticizer, butylcellosolve as a co-solvent, phosphoric acid as a modifying additive in the following ratio, wt.%:

Epoxy resin ED-2040,0-60,0
50%polyvinyl acetate
variance5,0-15,0
The synthetic rubber
oligophenylenes0,2-2,0
Polyoxyethylene ether of alkylphenol0,003-a 0.1
Oxide of chromium (III)2,0-5,0
Aluminium hydroxide2,0-5,0
Pigment red iron oxide2,0-5,0
Butylcellosolve1,0-10,0
Dibutyl0,3-0,7
Phosphoric acid0,01-1,0
The polyethylenepolyamine/td> 8,0-12,0
Water100



 

Same patents:

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.

SUBSTANCE: the invention is pertaining to the method of protection and recovery of the corroded metallic surfaces working in conditions of the abrasive wear, action of the aggressive mediums, for example, at transportation of the fertilizers, in the heat and power industry, chemical industry and the extractive industry at the repairs of the rust through equipment. The method provides, that at first they apply on the metallic surface of the priming coating based on the composition containing the following components (in mass. %): 20.0-30.0 - the epoxy dian resin with the epoxy reacting weight of 450-500, the curing agent, 12.0-25.0 - pigments, 12.0-25.0 - fillers, 20.0-30.0 - polyamide curing agent Versamid 115, the rest - organic solvents, with the subsequent drying "up to detachment". After that they apply the second insulating layer having the following composition (in mass %): 20.0-35.0 - of the epoxy dian resin with the epoxy reacting weight of 450-500, 5.0-10.0 - pigments, 5.0-12.0 -fillers, 20.0-35.0 - polyamide curing agents Versamid 115, 10.0-30.0 - micaceous iron oxides, the rest - the organic dissolvents, with the subsequent "up to detachment". After that they apply the third outer layer from the composition containing the following components (in mass %): 20.0-40.0 - the acrylic or polyester hydroxyl-containing resin used as the binder, 10.0-20.0 - pigments, 5.0-10.0 - fillers, 11.0-22.0 - the curing agent - aliphatic polyisocyanate, 0.1-0.5 - the organically modified polysiloxane, the rest - the organic solvents, further the product is dried up to the complete solidification. The invention allows to increase the corrosion resistance of the coating.

EFFECT: the invention ensures the increased corrosion resistance of the coating.

1 tbl, 2 ex

FIELD: paint and varnish industry, anti-corrosive agents.

SUBSTANCE: invention relates to corrosion modifying agents used for covering metallic surfaces without their preliminary cleansing from corrosion products. The corrosion modifying agent comprises the following components, wt.-%: hydrolysis lignin, 19-23; oil as by-side product in caprolactam manufacturing, 5-10; thermic ortho-phosphoric acid in the concentration 70%, 17-26, and water, balance. Invention provides preparing a composition transforming rust corrosion with layer thickness up to 160 mcm that provides enhancing adhesion of applied paint and varnish materials after treatment with the proposed modifying agent significantly.

EFFECT: improved and valuable properties of agent.

3 tbl

Rust transformer // 2286999

FIELD: paint and varnish industry.

SUBSTANCE: invention relates to rust modifying agents that use used for coating rust metallic surfaces without their preliminary cleansing from rust, among them, with mazut and oily pollutions and can be exploited in the range of temperatures from -50°C to +500°C. Proposed rust transformer comprises the following components, wt.-%: ortho-phosphoric acid, 37.0-51.0; graphite, 24.0-34.0; concrepol B, 0.3-1.2; lignosulfonates, 0.5-1.0, and water, 18-27. Invention provides enhancing effectiveness and prevention of separating into layers of the transformer for liquid and solid phase at prolonged storage.

EFFECT: improved and valuable properties of transformer.

FIELD: building materials.

SUBSTANCE: invention relates to a method for preparing an aqueous epoxide corrosion-stable priming used for protection against corrosion and no containing hexavalent chrome compounds. Priming comprises aqueous epoxide compound based on bisphenol A diglycidyl ester, hardening agent and chromate-free pigment inhibiting corrosion. Hardening agent is taken among the group comprising aqueous modified adducts of amines or polyamidoamines decreasing the water content. Chromate-free pigment inhibiting corrosion comprises chromate-free pigment additive inhibiting corrosion that is taken among the group comprising mixtures of cerium molybdate with bismuth vanadate, cerium molybdate with strontium tungstate, cerium phosphate with strontium tungstate, bismuth vanadate with bismuth molybdate and strontium tungstate, and their mixtures also. Pigment-filling agents and hydrophobic hardening agent are added to the priming composite for enhancing waterproofness and corrosion resistance. Invention provides excluding the negative effect of hexavalent chrome on environment objects and human body.

EFFECT: improved and valuable properties of priming.

4 ex

FIELD: protective materials.

SUBSTANCE: invention relates to a method for preparing priming coat for steel that is designated for assembly and applying upper coat. Steel in grounded with priming coat comprising a silicon dioxide-base binding substance containing silicon dioxide aqueous sol stabilized with aluminum oxide and, optionally, small amount of alkaline metal silicate. Indicated binding agent shows the mole ratio SiO2/M2O = at least 6:1 wherein M means the total amount of alkaline metal ions and ammonium ions. After drying the priming coat up to disappearance of stickiness in weal touch by a finger it is treated optionally with a solution that enhances the strength of the priming coat film.

EFFECT: improved and valuable properties of coat.

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

The invention relates to paints, varnishes and lacquers, namely priming water-dispersed compositions intended for the protection against corrosion of metal surfaces, operated in atmospheric conditions and exposed to various liquids

The invention relates to the field of protection of metal surfaces and restore corroded surfaces, working in conditions of abrasive wear, corrosive environments, for example when transporting fertilizers, energy, chemical and mining industry, the repair of corroded equipment and to protect it

The invention relates to compositions of corrosion-resistant coatings cold drying and can be used to protect the corroded surface

Primer // 2196792
The invention relates to anti-corrosion coatings applied under acrylic, urethane, perchlorovinyl and epoxy enamel in the manufacture and repair of aircraft products from aluminium and magnesium alloys and steels

FIELD: protective materials.

SUBSTANCE: invention relates to compositions used for applying covers. Composition contains zinc and water glass - potassium water glass as a binding agent with silicate modulus 4.8-5.3 or mixture of sodium-lithium water glass with silicate modulus 3.8-4.2 comprising the following components: soluble sodium silicate, technical lithium hydroxide, fumed silica, drinking water and ferrophosphorus. Invention can be used for protection of ferrous metals against corrosion with zinc-filled compositions. Invention provides improving anticorrosive and antifriction properties, enhancing wear resistance, electric conductivity, durability against cracking in drying, enhanced adhesion to metal, welding capacity, strength at impact.

EFFECT: improved and valuable technical properties of composition.

1 tbl

FIELD: protective coatings.

SUBSTANCE: invention relates to undercoat for metallic substrates designed for manufacturing articles and for applying top coating layers. Undercoat comprises silicate binder containing aqueous silica sol having SiO2/M2O molar ratio at least 25:1, wherein M represents sum of alkali metal ions and ammonium ion, silica particles having average size above 10 nm. Binder may further contain insignificant amount of alkali metal silicate. Content of solids in undercoat ranges between 20 and 40% (v/v) and volume ratio of pigment concentration to critic concentration thereof is below 1. Undercoat contains following proportions of components aqueous silicate sol as binder having SiO2/M2O molar ratio at least 25:1 and pH value between 9.5 and 11, wherein M represents sum of alkali metal ions and ammonium ion and silica particles are optionally modified with aluminum oxide and have average diameter 10-16 nm; 10-55% zinc and/or zinc alloy powder based on the weight of dry film having average particle size between 2 and 12 μm; 0-35% organic resin based on the weight of dry binder; and 0-30% organosilicon finishing material. Coating may contain zinc-free pigment(s) and filler increasing storage life time of undercoat. Method of applying undercoat onto steel substrate comprises preparing undercoat using silica sol, whose pH is adjusted to 9.5-11, and depositing undercoat onto steel substrate.

EFFECT: increased hardness and wear resistance, and enabled deposition of corrosion-resistant coating without blistering.

15 cl, 10 tbl, 14 ex

FIELD: corrosion protection.

SUBSTANCE: invention relates to anticorrosion compositions for metallic parts, in particular to utilization of MoO3 as agent enhancing anticorrosive properties of composition for anticorrosion coating based on dispersed metal, containing zinc of zinc alloy in aqueous phase (30-60% water in dispersion) and containing binding agent. Compositions for anticorrosion coating of metallic parts are disclosed containing such corrosion inhibitor (MoO3); at least one dispersed metal selected from group composed of zinc, aluminum, chromium, manganese, nickel, titanium, and alloys thereof; organic solvent; thickening agent; silane-based binder; optionally sodium, potassium, or lithium silicate; and water in amount from 30 to 60% by weight. Disclosed are also anticorrosion coating and metallic substrate with deposited anticorrosion coating prepared from above-defined composition.

EFFECT: improved resistance of composition to salt fog action.

22 cl, 2 dwg, 6 tbl, 3 ex

FIELD: protective materials.

SUBSTANCE: invention relates to a method for preparing priming coat for steel that is designated for assembly and applying upper coat. Steel in grounded with priming coat comprising a silicon dioxide-base binding substance containing silicon dioxide aqueous sol stabilized with aluminum oxide and, optionally, small amount of alkaline metal silicate. Indicated binding agent shows the mole ratio SiO2/M2O = at least 6:1 wherein M means the total amount of alkaline metal ions and ammonium ions. After drying the priming coat up to disappearance of stickiness in weal touch by a finger it is treated optionally with a solution that enhances the strength of the priming coat film.

EFFECT: improved and valuable properties of coat.

12 cl, 7 tbl, 21 ex

FIELD: corrosion protection.

SUBSTANCE: protective ground paint for painting coiled metal and electrochemical protection of bridges, power lines, and other long term-use metallic structures contains, wt %: epoxide resin 9.0-29.0, polyamide resin 3.0-9.5, pigment 23.0-36.0, zinc nanoparticle preparation 3.0-5.0, filler 13.0-23.2, and solvent - the balance. Zinc nanoparticle preparation is introduced in the form of (0.4-4)x·10-3 M solution in isooctane.

EFFECT: enhanced protective properties.

2 tbl, 4 ex

Coating composition // 2245893

FIELD: chemistry, in particular coating compositions, dyes and colorings.

SUBSTANCE: claimed composition includes resin with curing agent in combination with metal powder and stabilizing additive. More particular composition contains polyester resin or epoxy resin, 40-80 mass % of aluminum, iron, bronze, brass or copper powder with particle size of 25-250 mum, and as stabilizing additives at most 5 mass % of feltproofing additive and at most 20 mass % of thixotropic additive. Composition has high storage stability and useful for coating of any geometry surface.

EFFECT: coatings of high heat conductivity and thickness applicable for mechanical operation.

1 tbl

The invention relates to paints, varnishes and lacquers, namely priming water-dispersed compositions intended for the protection against corrosion of metal surfaces, operated in atmospheric conditions and exposed to various liquids

The invention relates to a protective coating of metal and concrete surfaces used in high corrosive activity
The invention relates to a steel sheet, in particular of stainless steel, suitable for the manufacture of the discharge element

The invention relates to a method of increasing saadasobrale powder compositions for coatings containing organic film-forming binder, which includes the introduction in the powder composition for coating at least two different compounds containing a residue of formula (A)

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as the electron donor, as well as to powder compositions for coatings containing organic film-forming binder and at least two different compounds containing a residue of formula (A), characterized by the ratio of the charge/mass of at least 200With/kg

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.

SUBSTANCE: the invention is pertaining to the method of protection and recovery of the corroded metallic surfaces working in conditions of the abrasive wear, action of the aggressive mediums, for example, at transportation of the fertilizers, in the heat and power industry, chemical industry and the extractive industry at the repairs of the rust through equipment. The method provides, that at first they apply on the metallic surface of the priming coating based on the composition containing the following components (in mass. %): 20.0-30.0 - the epoxy dian resin with the epoxy reacting weight of 450-500, the curing agent, 12.0-25.0 - pigments, 12.0-25.0 - fillers, 20.0-30.0 - polyamide curing agent Versamid 115, the rest - organic solvents, with the subsequent drying "up to detachment". After that they apply the second insulating layer having the following composition (in mass %): 20.0-35.0 - of the epoxy dian resin with the epoxy reacting weight of 450-500, 5.0-10.0 - pigments, 5.0-12.0 -fillers, 20.0-35.0 - polyamide curing agents Versamid 115, 10.0-30.0 - micaceous iron oxides, the rest - the organic dissolvents, with the subsequent "up to detachment". After that they apply the third outer layer from the composition containing the following components (in mass %): 20.0-40.0 - the acrylic or polyester hydroxyl-containing resin used as the binder, 10.0-20.0 - pigments, 5.0-10.0 - fillers, 11.0-22.0 - the curing agent - aliphatic polyisocyanate, 0.1-0.5 - the organically modified polysiloxane, the rest - the organic solvents, further the product is dried up to the complete solidification. The invention allows to increase the corrosion resistance of the coating.

EFFECT: the invention ensures the increased corrosion resistance of the coating.

1 tbl, 2 ex

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