SU1636437A1 - Method of steel parts coating - Google Patents

Abstract

This invention relates to a process for the production of coatings on metal parts and can be used in various plants. The invention improves the performance of the method and improves the quality of sfa coatings due to the fact that the method of producing coatings by applying a solution of a modifier in an organic solvent, drying it, applying a solution of a urethane thermoplastic elastomer - the product of the interaction of simple and complex oligoesters, 1,4-butanediol and 4,4 - diphenylmethane diisocyanate in an organic solvent, its drying and heat treatment, as a solution of the modifier use a 0.3-5% solution of epoxy diane oligomer in organic growth as the organic solvent of a urethane thermoplastic elastomer — a mixture of dimethylformamide with ketones or СoС4 esters with a mass ratio of 1– (0.5–4.0}). In a solution of the urethane thermoplastic elastomer (UT} it is possible to additionally add polyether oxide 4 based on 4-diphenylmethanediisocyanine in an amount of 0.1-3.0 parts by weight per 100 parts by weight UT or a mixture of polyisocyanate with 3-15 parts by weight, polymethylphenylsiloxane with half a meter 1,500 per 100 ma.ch. UT. 1 epf-ly, 1 tabl (L

Description

The invention relates to the technology of producing coatings on metallic parts and can be used in various enterprises. The purpose of the invention is to increase the productivity of the process and improve the quality of the coatings.

The method is carried out as follows.

First, modifier solutions are prepared, as well as solutions of urethane thermoplastic elastomers (UT) for coating. Then prepare the surface of the metal substrate. As the latter, a core telegraph apparatus with a working surface of about 2 with a multilayer electroplated coating, the surface layer of which is made of zinc, and a foil of steel 08KP (thickness 50 μm) is used. The surfaces of the foil and korea are degreased by repeatedly wiping them with a tampon dipped in acetone and toluene. Then

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WITH

The foil and the core are placed in a horizontal position and irrigated with a 0.3-5% solution of epoxy diane oligomers in methanol or ethyl acetate. The solvent was evaporated, as was tetrahydrofuran, at 25-40 ° for 10-T5 minutes. After that, solutions based on (, UT to obtain a coating are applied to metal surfaces. UT-based solutions are prepared by mixing dimethylformamide with a ketone or ester and then introducing UT granules into the mixture solvent ( in a mixture, the UT is pre-dissolved in it, and then the solution is diluted with ketone or ester to the desired concentration}.

When applying the solution, the metal surface is in a horizontal position. Next, the coatings are dried and heat treated according to the mode indicated in the table.

The cycle time for obtaining the coating on the electromagnet cores is 90 minutes. In a single molding cycle, 100 coated parts are produced on the unit. The average value of the coating thickness on the foil and core x is 100 µm.

Upon receipt of the coating on the bark of electromagnets on a semi-automatic installation, the number of bark is found on the surface of which the solution spreads completely (the solution spontaneously spreads over the entire surface of the core). The number of these koreas is determined as a percentage of their total amount, which is 40-50 pcs.

The table lists the operations necessary to implement the method, the components, their quantities, the parameters of the method and the properties of the coatings.

Claims (2)

Invention Formula 1t Method of producing coatings on metal parts by applying a solution of the modifier in an organic solvent, drying it, applying a solution of a urethane thermoplastic elastomer — product of the interaction of oligoester or oligoester, 1,4-butane diol and 4,4t-diphenylmethane diisocyanate in an organic solvent drying and subsequent heat treatment, characterized in that, in order to increase the productivity of the method of improving the quality of coatings, a solution of the modifier uses a 0.3-5% solution of epoxy dianol omer in an organic solvent, and as an organic solvent of a urethane thermoplastic elastomer - a mixture of dimethylformamide with ketones or esters., with their assortment ratio of 1: (0.5-4.0). 2. A method according to claim I, characterized in that a solution of a urethane thermoplastic elastomer is used, further comprising a polyisocyanate based on 4,4-diphenylmethane diisocyanate in an amount of 0.1-3.0 wt.h. per 100 mach., of a urethane thermoplastic elastomer or a mixture of polyisocyanate with polymethylphenylsiloxane, mol.m. 1500 when its content is 5-15 ma. on 100 ma.ch. urethane thermoplastic elastomer. Modifier solution components, wt.%: ED-20 epoxy doped ester, ED-20 solvent epoxidine oligomer: methanol (rectified) ethylacetate (grade of polyester imide resin PE 955 urethane thermoelastostast brand Vitour T 1413-85 Vitour T 0213-90 Vitour T solvent poly-, etherimid resin and urethane thermoelastoplite - tetrahydrofurav (chemically pure) Amount of modifier solution applied to metal, g / m Thermal treatment mode of modifier ia metal : temperature, C time, min The components of the solution, wt.%: Urethane ThermoElastoplast of the Vitur T 1413-85 brand Vitour T 0213-90 Vitur T 0433-85  Application of the modifier solution 0.4 1 5 10.3 5 1 -, -I J. 99.7 99 95 - 99. 99.7 95: 99 99 -, 99 - --99 99 96 96 100 100 100 15 100 200 100 100 200 15 100 100 100 100 180 30 180 30 Application of a solution based on urethane thermoplastic ten 10 10 10 10 10 10 10 ten ten ten ten ten ten adhesive strength, kN / m maximum variation in the thickness of coatings on the surface of parts. . Lei, mkm 1.7 1.6 1.5 1.75 K 1.72 CK CK 1.8 1.6 25 30 30 12 10 10 10 10 10 10 12 15 1.72 CK CK 1.8 1.6 yo 1415 Omshmmvty solvent modifier, -mass.X: Epochsidian ol goiar brand ED-20 ED-10 Solvent of eshsidian olomer: (methanol rectificate) et l acetate (ppm), polyetherimide resin PE 955 Uretha thermoplastic elastomer brand. Yaitur T U13-85. Vitour T 0123-90 Vitour T 0433-85 solvent polyethylene imkd about "resin and 99 0.3 I 0.3 1 ° .J 1 0.1 7 0.1 7 99.7 99 95 99.7 99 95 99.9 93 99.9 93 99.9 93 15 of urethane thermoelectric astroplast - tet rahidrofuran (chemically pure) - - - The amount of myelificator solution applied and the metal is 100 200 heat treatment cycle of the metal fraud on the metal: temperature, ° С - - - time, min- - - Application of a solution based on a urethane thermoplastic component of the solution, ac.X: urethane thermoplastic brandi. Vitour T 1413-85 10 10 10 10 Vitour T 0213-90 Vitour T 0433-85 - - - - ;. polyisocyanate- about, 01 0.1 0.3 polymethylphenylsiloxane - - - - solvent of urethane thermoplastic elastomer: dimetzpormamid h.da, 30 59.99 30 17.9 59.7 ketone or ester With-With: acetone h.a. - - - - methylethyl ketone30 59.9 71.8 29.99  methyl ethyl ketone h, da .--, methyl acetate h.a. 60 ethyl acetate ch.a. - - those tragidrofuran (chem. grade) - Heat treatment mode of the coating in metal: ten 0.01 0.3 100 200 ten 230 - 10 230, 10 230 59.7 29, 99 ten 0.01 0.3 10 0.1 one 29.6 59Г3 ten 0.3 1.5 17.1 71.1 ten 70 20 10 1010 10 1.0 0,0050,5 0,005 0,5 - - 0.15 1.8 15 69,99511,9 69 44,6 75 20-74,620,845 73.1 o- and os -J to Method indicators performance: the number of Koreas, on the surface of which a complete spreading of the solution of the urethane thermoelectric astroplast is observed, Z The spreading area of one drop of the solution based on the urethane thermoplastic elastomer, see the duration of the molding cycle 100 pcs. core quality of coatings: adhesive strength, kN / m maximum variation of coating thickness on the surface of parts, µm Notes e. K is a compound that destroys it when testing a cohesion about the coating material, i.e., the adhesion strength exceeds the coherence strength of the coating material (this means that the heat resistance at 100 microns and a width of 10 mm is about 1.7-1, 9 kN / m). 100 95 100 100 100 100 100 80 85 80 85 85 85 13 ten thirty 18 thirty 17 28 15