Primer for corrosion-resistant coating

 

(57) Abstract:

Usage: the invention relates to the field of water-resistant, anticorrosive primers under urethane, Acrylonitrile, acrylic and epoxy coatings for corrosion protection of aircraft products. The essence of the invention: a primer for corrosion-resistant coatings with improved adhesion, corrosion protection of aluminum and magnesium alloys and steels resistant to hydraulic fluids containing a binder based on epoxy resin, titanium dioxide, a filler is talc, anti-corrosive pigment-strontium chronologicly, hardener, organic solvents, characterized in that it further comprises a modifier based on acrylic resins, anti-corrosive pigments and barium chronologicly and zinc molybdate, and filler Aerosil, and as a hardener - organosilicon amine, in the following ratio, wt. hours: epoxy resin 100; modifier based on acrylic resin 10 to 20; strontium chronologicly 10 - 20; barium chronologicly 20 - 40; molybdate zinc 20 - 40; Doukas titanium 20 - 40; talc, micro-talc 25 - 40; Aerosil 5 - 12; hardener based kremasti waterproof anti-corrosion primers, done under urethane, Acrylonitrile, acrylic and epoxy enamel for corrosion protection of parts, units and collected the products of aviation technology from various alloys (aluminum, magnesium alloys, steel).

Known coating AK-070 (GOST 25 18-83) yellow, including polymeric binder based on acrylic resin with the addition of another polymer resin anticorrosive pigment-strontium chronologicly and organic solvents. Primer AK-070 is intended for priming aluminum, magnesium alloys and steel coating systems with acrylic and epoxy enamels. Primer cold drying, quick-drying, at a temperature of 18-23oC for 1 hour. However, technological and protective properties of the primer AK-070 insufficient: the coating has low fuel and oil resistance, can not withstand the action of hydraulic fluid ngj-4, used on modern aircraft, has a low protective properties. In addition, the primer AK-070 has high toxicity due to the high content of highly toxic anticorrosive pigment-strontium hromovokislyj (MPL=0.01 mg/m3).

Closest to the technical nature of the claimed composition primer Yai organic solvents.

Primer EP-076 comes complete with two components: paste EP-T and hardener N 2.

Primer EP-076 is used for painting parts of magnesium alloys and steels.

The primer composition: wt.h. (considering 100% substance):

Epoxy resin 100

Anticorrosive pigment-strontium chronologicly 60

The pigment is titanium dioxide 45

The filler is talc 45

The curing agent is a polyamide resin 50

Organic solvents 370

Pasta EP-T is a suspension consisting of epoxy resin, pigments and fillers in the mixture of organic solvents; the hardener N 2 30% solution of polyamide resin in a mixture of organic solvents.

Primer EP-076 applied mainly by drying the coating at 90-100oC for 1-2 hours and coating systems with epoxypropane enamels. To the aluminum alloy base material plating aeronautical products primer EP-076 has low adhesion, the primer is destroyed by the action of the coating liquid ngj-4 and quite toxic because it contains a large number of anticorrosive pigment-strontium hromovokislyj.

Primer EP-076 taken as a prototype for C is anticorrosion protection aluminum, magnesium alloys and steels with improved adhesion and protective properties, moisture-proof, resistant to hydraulic fluids ngj-4, high-tech, stable during prolonged storage and less toxic. The primer is intended for coating systems under acrylourethane, urethane, acrylic and epoxy enamel.

Offers a primer of the following composition, wt.h. (considering 100% substance):

Epoxy resin e-R(TU 6-10-607-78) 100

Modifier-acrylic resin BMC-5 (TU 6-02-115-91) 10-20

Anticorrosive pigments:

strontium chronologicly (TU 48-4-239-82) 10-20

barium chronologicly (TU 6-09-5286-86) 20-40

molybdate zinc (TU 301-10-034-90) 20-40

Doukas titanium (GOST 9808-84) 20-40

Fillers:

talc or micro-talc (TU 21-25-201-77,GOST 19284-79) 25-40

Aerosil (GOST 14922-77) 5-12

The hardener is a product on the basis of organosilicon amines of AGM-9 (TU 6-02-724-77) 30-50

Organic solvents: xylene (GOST 9949-76, GOST 9410-78) acetone (GOST 2768-84) butyl acetate (GOST 89-81) ethyl cellosolve (GOST 8313-88) - 400-600

The inventive primer differs from primer prototype composition of the binder is a film-forming agents; pigments and fillers; hardener:

the introduction of acrylic modificato the coating cold drying due to the necessity of priming the collected and bulky items and at the same time exposed to drenching the hydraulic fluid ngj-4;

use as anticorrosive pigments barium hromovokislyj (MCL=0.1 mg/m3and molybdate zinc (MPL=1.0 mg/m3) and the reduction of strontium hromovokislyj to reduce the toxicity of primers;

the introduction of Aerosil to improve the stability of the primer during storage.

An example implementation of primers primer consists of:

semi-finished product, which is a suspension of pigments and fillers in a solution of epoxy resin,

modifier representing a solution of acrylic resin BMC-5 (copolymer of butyl methacrylate and methacrylic acid),

hardener of AGM-9,

which are mixed before application.

Prefabricated primer made by dispersion of pigments and fillers in a solution of epoxy resin in a ball or bead mill. Upon reaching the desired degree of milling the contents of the mill is pumped into the mixer, add solvents and prefabricated put the type on viscosity and content of non-volatiles.

The modifier is produced in the reactor by dissolving acrylic resin BMC-5 in a mixture of rest the Ute modifier and curing agent, primer is diluted with an organic solvent and applied on the metal surface, mainly using the paint sprayer. The drying time of the primer 3-6 hours at a temperature of 12-35oC. Then overlap 2-3 coats of acrylic enamel or 2 layers of urethane, Acrylonitrile, epoxy enamel.

Table 1 shows the compositions of the inventive primers, primers with outrageous quantities of the components, primers prototype.

Table 2 presents the properties of the coatings and coating systems, in comparison with the ground-prototype EP-076 applied on different alloys (aluminium and magnesium) and on steel.

As follows from the obtained data, the proposed primer exceeds the primer prototype.

The inventive primer, as such, and to coating systems with acrylic, Acrylonitrile, urethane and epoxy enamels provides adhesion to the aluminum alloy, while the primer prototype in the coating loses adhesion when wet pavement.

Adhesive properties attached to the primer:

acrylic modifier

hardener-organosilicon amine of AGM-9,

reduced levels of strontium chromosomal decreasing the osmotic inflow of moisture in the floor.

The inventive primer resistant to hydraulic fluids ngj-4 (primer prototype is destroyed). The stability of the inventive primer to ngj-4 is provided by the hardener of AGM-9 and anti-corrosion pigments barium chronologicly and zinc molybdate.

When tested in the wet chamber of the coating system with the inventive primer and acrylic, Acrylonitrile, urethane and epoxy coatings deposited on aluminum alloy remain unchanged and have adhesion for a long time, while the coatings of primer prototype bubbles are formed and disrupted adhesion.

Under accelerated test chamber salt spray coating system with the inventive primer deposited on the aluminum alloy, and subsequently cut cover retain the protective properties remain unchanged (there is no violation of the coating from the incision) and no corrosion damage.

The anticorrosive effect of the inventive primer coating, in spite of reduced compared to the prototype, the content of strontium hromovokislyj provides regulated by the ratio of strontium hromovokislyj with low toxic anticorrosivematerial, urethane and epoxy coatings deposited on low-alloy steel and oxidized magnesium alloy also provides protection against corrosion when tested in a salt fog chamber.

Due to the fact that prefabricated epoxy primer is a multiphase system, during long-term storage is the settling of pigments and sediment, especially at the expense of barium hromovokislyj and zinc molybdate. The addition of Aerosil in the composition of the primer prevents settling of pigments during storage of semi-finished product.

To improve the technological properties of the primer when applying the primer composition is introduced titanium dioxide, resulting in increased opacity primer.

From the obtained data, it also follows that the inventive primer provides requirements for the protection of aluminum alloy core alloy exterior products for joint action of the components contained in certain of the claimed proportions, as evidenced by results on the properties of coatings, in comparison with compositions of the primers with the beyond the content component.

Introduction to the primer acrylic modifier is less the lower the s content of the hardener also have a negative effect on the adhesion primer (example 6). In addition, a significant reduction in the adhesion of the primer coating at elevated beyond the content of strontium hromovokislyj and titanium dioxide in the primer (example 5) and incredibly low content of barium hromovokislyj and zinc molybdate (examples 7 and 9), which also leads to the reduction of the protective properties of coatings when tested in a moist chamber.

The resistance of coatings to liquid ngj-4 decreases with exorbitant reduced number of AGM-9, beyond the increased content of the acrylic modifier (example 6) and incredibly low content of barium hromovokislyj and zinc molybdate (examples 7 and 9).

The anticorrosive action of pavements under accelerated test chamber salt spray (with pre-cut cover) decreases with exorbitant reduced content in the primer strontium hromovokislyj and hardener of AGM-9 (example 6), and with reduced content of modifier and at maximum a higher content of titanium dioxide (example 5).

When increased beyond the content of barium hromovokislyj and molybdate zinc and incredibly low content of Aerosil (examples 8 and 10) is the formation of a dense hard razmeshivaem the years of Aerosil (example 9) increases the viscosity of the intermediate product of the primer during storage.

When beyond lower content of titanium dioxide (example 6) is reduced opacity primer coating when applied.

The results of the test primer, it follows that on the basis of epoxy resin with acrylic modifier and curing agent based on silicone amine, pigment part, containing a relatively small amount of strontium hromovokislyj (MPL=0.01 mg/m3), low-toxic anticorrosive pigments include barium chronologicly (MCL=0.1 mg/m3), zinc molybdate (MPL=1.0 mg/m3), titanium dioxide, fillers: talc (or micro-talc, Aerosil and with organic solvents (xylene, acetone, butyl acetate, ethyl cellosolve) obtained composition of the primers designed for corrosion protection of metal surfaces (aluminium, magnesium alloys, steel) aviation equipment for coating systems under acrylic, Acrylonitrile, urethane and epoxy enamel.

Primer cold drying, high-tech, stable during storage components (prefabricated, modifier and curing agent).

Coating system using the proposed primer composition have increased rabotosposobnom anticorrosive action.

The primer is designed to protect aluminum, magnesium alloys and steels.

The proposed primer helps to increase the life of the coating system in 1.5 times.

Primer for corrosion-resistant coating comprising a polymeric binder based on epoxy resin, titanium dioxide, filler talc, anti-corrosive pigment strontium chronologicly, hardener, organic solvents, characterized in that it further comprises a modifier based on acrylic resins, anti-corrosive pigments are barium chronologicly and molybdate zinc and filler Aerosil and as a hardener - organosilicon amine in the following ratio, wt.

Epoxy resin 100

Modifier based on acrylic resin 10 20

Strontium chronologicly 10 20

Barium chronologicly 20 40

Molybdate zinc 20 40

Titanium dioxide 20 40

Talc, micro-talc 25 40

Aerosil 5 12

Curing organosilicon amine 30 50

Organic solvents 400, 600V

 

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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

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: 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

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: 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

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: 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

Priming composition // 2322467

FIELD: protecting materials.

SUBSTANCE: invention relates to priming compositions used for anticorrosive covers applied on surface of mainly ferrous metals in machine engineering, and woody and other materials. The priming composition comprises lacquer GF-01, red pigment, siccative, solvent, chalk of sort M-5 and lecithin as a disperser, siccative NF-1 as a siccative, and slime after dry scrubbing in electric steel melting production of the following chemical composition, wt.-%: SiO2, 7.76; phosphorus (P), 0.041; chrome (Cr) total, 1.0; Al2O3, 0.93; TiO2, 0.099; MnO, 2.29; CaO, 21.3; MgO, 24.5; FeO, 3.91; Fe2O3, 32.02; CaF2, 5.26; CaO (incompletely burned material), 0.89 in the following granulometric composition of slime, %: below 20 mcm, 15; from 20 to 25 mcm, 60, and from 25 to 100 mcm, 25. Invention provides decreasing cost and enhancing exploitation parameters of the priming in coating the broad spectrum of surfaces in machine engineering and building.

EFFECT: improved and valuable properties of priming composition.

5 tbl

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: 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

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