Filming agent for protective paint-and-varnish coats

FIELD: construction.

SUBSTANCE: filming agent represents distillation residue of 4,5,6,7-tetrahydroindole production.

EFFECT: filming agent is highly adhesive to metals and protects them efficiently against corrosion.

1 cl, 4 ex

 

The invention relates to the field of corrosion protection and is specifically concerned with the creation of new protective paints and varnishes based on synthetic materials.

Paint coating, applied in a thin layer on metals, plastics, wood, plaster, concrete and other materials, provide reliable protection from the external environment [1, 2]. Coating materials lacquers or paints has significant advantages over other types of protective coatings. They are easily applied to the surface of the protected material, durable enough and, in addition, give the surface the appearance of satisfying operational and aesthetic requirements. Used coating materials are complex compositions that include binders, solvents, pigments, fillers, plasticizers, driers, and other components [3]. The main component of any paint material, to the greatest extent determines the properties of the resulting coating is a film-forming substance. As the binders used drying oils (linseed oil), natural and synthetic resins (rosin, bitumen, amber), cellulose ethers, various synthetic resins obtained by polycondensation (alkyd, phenol-formaldehyde, urea - and melamineformaldehyde, polyurethane), or by polymerization (perchlorovinyl, polyacrylic, polyvinylacetals, alkyd-styrene, etc.) [4-7]. Also use epoxy resin (sometimes in combination with other binders) [8] and some types of synthetic rubbers [9]. This variety of used film suggests that each of them can fully satisfy the entire set of requirements for coatings. The great value has the value used foaming agent, which often determines the cost of paint or varnish. For this reason, as the film-forming suggest the use of some waste. In the literature there are examples of the use of waste products range of products industrial organic synthesis as components of the paint composition. For example, it is known the use of bottoms purification of isoprene, which is a resin with a softening temperature of 30-60°C, to modify the best choice of film-forming [10]. The disadvantages of such a method of obtaining a film-forming is a wide variation in the content of the main component used resin - fulvene (35-70%) and, consequently, change the time of the curing film-forming. Distillation residues rectification b is Tatiana are used in the production of composite drying oil [11], and distillation residues of the distillation of styrene invited to apply to improve properties of drying oils "orgtehstroy-5" [12]. In the latter case, the disadvantage of this method of improving the properties of a drying oil is the need for pre-treatment bottoms powdered lime at a temperature of 100°C. Designed and implemented in the production process line get varnish on the basis of the bottoms of the distillation of styrene, which is used to create a protective coating of ships, offshore platforms, etc. [13]. The drawback of using a bottoms distillation of styrene in this direction is the expanding use in the process of rectification of styrene polymerization inhibitors of different nature, which become VAT residue, changing its composition and properties. Also known composition [14], in which the foaming agent is a copolymer of VAT residue co-production of styrene and propylene oxide with maleic acid or maleic anhydride, and the solvent xylene and complex solvent RS-9, obtained from the waste butyl alcohols with acetic acid or waste it contains. The proposed composition has improved decorative properties, but can only be obtained from the above components, since one of the tasks during its creation I have served as the disposal of waste in these industries.

The closest analogue to our proposed invention (prototype) is a foaming agent for protective coatings, representing a departure from the production of synthetic detergents - distillation residues of synthetic fatty acids formed during the oxidation of paraffin hydrocarbons [15].

We offer a technical solution differs from the prototype in that the film-forming protective coatings use waste production 4,5,6,7-tetrahydroindole VAT residue - resinous product formed in the process of selection of the target product obtained by the condensation cyclohexasiloxane with acetylene, by distillation of the reaction mixture [16]. VAT residue when cooled becomes brittle solid substance from brown to almost black, and has the following physicochemical characteristics: the temperature at which softening of about 50°C; it is soluble in acetone, chloroform, alcohols, toluene and other organic solvents. Elemental composition (%): 66-67, H 6.5-7.5, N 7.0-7.5, S 3.3-3.7, Na 3.6-3.9. According to IR and NMR spectroscopy of the obtained substance is a mixture of high-molecular, oligomeric and low molecular weight products containing cyclohexanone fragments, conjugated double bonds, tetrahydroindole of the piece is s, sodium salt organosulphur acids, Aksinya functions associated carbonyl and carboxyl groups, and possibly some other functional groups and substituents. In the solid state product has paramagnetic properties (concentration of paramagnetic centers 9·1017spin/g, g-factor 2.0043, ΔN 6.9 e) and has an electrical conductivity at the level of the high resistance of organic semiconductors (10-12-10-14Cm/cm).

The use of waste production 4,5,6,7-tetrahydroindole as a foaming agent is illustrated by the following examples.

Example 1. In a porcelain mortar was ground in 5 g of resin used and the obtained powder was dissolved in 5 g of solvent (butanol). For the application of the test solution used metal samples of steel St3, prepared in the usual manner for coating. The coating was applied by dipping. The coating layer was thin, uniform, translucent Golden brown. The obtained coatings were tested for adhesive strength by the method of lattice cuts [17]. The test results showed that in four levels of the adhesion strength of the coating is measured at 2 points (at the intersection of the lines of the lattice, there is a slight peeling, the violation is not more than 5% of the surface lattice). And decorazione properties of the obtained coatings was evaluated by electrochemical method [18] by comparing the electrochemical characteristics of steel samples with paint coating and without coating, immersed in a 3% solution of sodium chloride at different exposure times. Tests showed that when the coating potential of the metal is shifted by about 0.5 V in the direction of positive values, which indicates the difficulty of the anode reaction of ionization of the metal, and thus effective anti-corrosion protection.

Example 2. In the conditions of example 1, but using as solvent acetone coating was applied with a brush. The adhesion strength of the coating is estimated at 1 point (no signs of exfoliation in any square lattice), the shift of the potential in the positive direction (compared to the sample without coating) is 0.05 to 0.16 Century

Example 3. In the conditions of example 1, but with the additional introduction of a solution of 1 g (10% of the total mass) of dibutyl phthalate as a plasticizer adhesive strength of the coating is estimated at 1 point, the potential shift is 0.1 to 0.18 Century After 2 hours of exposure of the samples in 3% solution of sodium chloride at an unpainted sample appeared traces of rust, the floor is left smooth, smooth, no lags behind the metal.

Example 4. In the conditions of example 1, but with the additional introduction of dibutyl phthalate, epoxy resin (with hardener) and silica (as filler) (composition, % wt.: the investigated resin 15, butanol 15, dibutyl 3, epoxy resin 57, PU glue, the earth 10) received a brilliant cover, adhesive strength of which corresponds to 1 point. The offset potential of the sample is 0,03-0,12 Century Composition this composition had a protective effect was higher than that applied lacquer XB-784.

Thus, the resin, which is a waste product of tetrahydroindole, can be used as a foaming agent to obtain a paint and varnish materials of different composition, which have high adhesion to metal and effectively protect metals from corrosion. This resin in the solid state is easily stored without significant chemical transformations, has low odor, can be transported by all means of transport.

List of used sources

1. Beetle I.E. the Rate of corrosion and protection of metals. - M.: Metallurgy. 1976. 472 S.

2. Kosachev V.B. have been the Basic principles of protection against external corrosion. Paint coating, recommended for protection against external corrosion. // News of heat supply. 2006. No. 2. P.37.

3. Sorokin F, Kochneva Z.A., Shod L.D. Chemistry and technology of film-forming substances. - M.: Chemistry. 1989. 480 S.

4. Dr. A.A. Polymer and polymer-bitumen materials to protect pipelines from corrosion. - M.: Publishing House. literature on the construction. 1971. 127 S.

5. Reibman A.I. Protective paint coating in chemical industries. L.: Chemistry. 1973. 336 S.

6. Rosenfeld, I., Rubinstein FI, YIG is fishing K.A. The protection of metals from corrosion coating. - M.: Chemistry. 1987. 224 S.

7. Shevchenko A.A. Chemical resistance non-metallic materials and corrosion protection. - M.: Chemistry. Colossus. 2004. 248 C.

8. Finkelstein M.I. Industrial application of epoxy paints and varnishes. L.: Chemistry. 1983. 120 S.

9. Sobolev V.M. Borodin IV Industrial synthetic rubbers. - M.: Chemistry. 1977. 392 C.

10. A.S. USSR 1087535, MKI 08F 236/10, SS 2/02. The method of obtaining modified the best choice of film-forming.

11. Y.A. Sergeev, Nikulin S., Shein B.C. // Paint-and-lacquer materials and their application. 1986. No. 4. P.15.

12. A.S. 181218 the USSR, CL. 22h, 2. The method of production of synthetic drying oils.

13. Nikulin S., Shein, V.S., Slotsky S. and other Waste and by-products of the petrochemical production - raw materials for organic synthesis. Ed. Miercurea. - M.: Chemistry. 1989. 240 C.

14. Filimonova OP, Anytine MV Patent RU 2309967 C1. IPC C09D 125/04, 13.07.2006. Composition for coating.

15. Sysoev, A., Gordeev-Gavrikov VK, Motovilov V.T. Patent RU 2073746 C1. IPC C23F 11/00, 20.02.1997. Anticorrosive composition is applied on a metal surface covered with rust.

16. Trofimov B.A., A. I. Mikhaleva, Schmidt EJ, Ryapolov O.A., Platonov V.B. have been Patent RU 2297410 C2. IPC C07D 209/04. 27.07.2005. The method of obtaining 4,5,6,7-tetrahydroindole.

17. GOST 15140-78. "Materials paint. Methods determine the value of adhesion".

18. Karjakin M.I. Test paints and coatings. - M.: Chemistry. 1988. 272 C.

The film-forming protective coatings, representing a departure from the production of 4,5,6,7-tetrahydroindole VAT residue - resinous product formed in the process of selection of the target product obtained by the condensation cyclohexasiloxane with acetylene, by distillation of the reaction mixture.



 

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2 tbl

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4 tbl, 6 ex

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4 tbl, 6 ex

FIELD: construction.

SUBSTANCE: filming agent represents distillation residue of 4,5,6,7-tetrahydroindole production.

EFFECT: filming agent is highly adhesive to metals and protects them efficiently against corrosion.

1 cl, 4 ex

FIELD: chemistry.

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FIELD: chemistry.

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21 cl, 4 tbl, 3 ex, 5 dwg

FIELD: chemistry.

SUBSTANCE: first, a slurry of monomer pellets is formed from an aqueous solution of an ethylenically unsaturated monomer or a mixture of monomers in a hydrocarbon non-aqueous liquid containing an amphipathic stabiliser. Further, a monomer or a mixture of monomers is polymerized to form polymer beads that are suspended in a hydrocarbon non-aqueous liquid. Then, the slurry of polymer pellets is removed, and the polymer pellets are removed therefrom. After this, the hydrocarbon non-aqueous liquid is moved to the purification stage of impurities. In the filtration stage with a crossflow, particles are removed from the hydrocarbon non-aqueous liquid. The device, suitable for the slurry polymerization process, includes: a vessel suitable for containing a hydrocarbon non-aqueous liquid; a means for forming a slurry of aqueous monomeric pellets in a hydrocarbon non-aqueous liquid; a means for removing a slurry of polymer pellets from the vessel; a means for recovering the polymer pellets from the slurry; a means for purifying the hydrocarbon non-aqueous liquid in, at least, one filtration step.

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16 cl, 3 dwg, 1 ex

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