Composition for anti-corrosion coatings
(57) Abstract:Composition for anti-corrosion coatings with the use of a copolymer on the basis of the bottoms of the distillation of styrene copolymer KORS), which is intended primarily for the protection of metal (including steel) structures used in industrial environments and weather conditions with significant pollution aggressive components, contains a copolymer on the basis of the bottoms of the distillation of styrene, polyvinyl chloride, polystyrene, cyclohexanone, filler, pigment, xylene. When testing the resistance film integrated coating (one coat of primer, two coats of the coating composition, one layer of varnish) to 25% sulfuric acid at 20°C at a holding time of 150 h as follows: coating without modification. 3 table. The invention relates to compositions for anti-corrosion coatings with the use of a copolymer on the basis of the bottoms of the distillation of styrene copolymer KORS), and is intended primarily for the protection of metal (including steel) structures used in industrial environments and weather conditions with significant pollution aggressive components.Known composizione KORS) as a foaming agent, policrystalline, plasticizer, asbestos as filler, xylene as the organic solvent .Coatings based on this composition have a relatively small cost low protective properties in industrial environments and weather conditions with significant pollution aggressive components.Known composition for corrosion-resistant coating comprising a copolymer based on a bottoms distillation styrene copolymer KORS) as a foaming agent, plasticizer, asbestos as filler, xylene as the organic solvent, the copolymer based on oligomers of butadiene with methyl methacrylate .The disadvantage is that at relatively small cost of the coverage it has a low protective properties in industrial environments and weather conditions with significant pollution aggressive components.Closest to the technical essence, adopted as a prototype, is a composition for corrosion-resistant coating comprising a copolymer on the basis of the bottoms of the distillation of styrene, xylene, filler, pigment. In addition, the composition included PLA>-C9- resin SPP 9 - 14 .The advantage of the composition is relatively low cost coverage. However, the coating has low protective properties in industrial environments and weather conditions with significant pollution aggressive components.The problem to which the invention is directed, is to create compositions that provide enhanced protective properties are the same as those known chemically resistant coatings, which are assessed in conditions of significant pollution aggressive components in the cost of the proposed coating not less than 1.5 times less known.The problem is solved as follows. According to the invention, the composition for corrosion-resistant coating comprising a copolymer on the basis of the bottoms of the distillation of styrene, xylene, pigment, filler, has a distinctive essential features in the new essential features, namely the composition further comprises polyvinyl chloride, polystyrene and cyclohexanone in the following ratio, wt.%:
The copolymer based on the bottoms of the distillation of styrene - 8 - 11
Polyvinyl chloride - 6 - 8
On the/BR> In the proposed new essential features of the adhesion mechanism of the protective action provides mainly the copolymer based on the bottoms of the distillation of styrene, and the barrier mechanism of the protective action provide polyvinyl chloride and polystyrene together with a copolymer based on a bottoms distillation of styrene. Cyclohexanone as a solvent for polyvinyl chloride, is used to enter into the composition of the latter. Thus, in comparison with the prototype, the coating on the basis of which it has a predominantly adhesive mechanism of the protective action, due to the introduction of polyvinyl chloride and polystyrene reinforced barrier mechanism of the protective action and when coating based on the proposed composition is mixed mechanism of the protective action, which is typical of chemically resistant coatings.As a copolymer on the basis of the bottoms of the distillation of styrene using a polymerization product of a joint VAT residue of the distillation of styrene with acid anhydrides (maleic anhydride) (GOST 11153-75).Polyvinyl chloride is a product of the radical-chain polymerization of vinyl chloride with a degree of polymerization of 100 to 2500, to the t polymerization of styrene (GOST 20289-84).Cyclohexanone (GOST 24615-78) - pipelineby ketone, the composition is used as a solvent of polyvinyl chloride.As filler can be used talc powder for paint industry (TU 21-25-201-77), mica Muscovite ground (GOST 855-74). As a pigment can be used titanium dioxide pigment (TU 6-10-1650-85), zinc (GOST 202-84), red iron oxide (GOST 8135-74), pigment yellow zheleznovsky (GOST 18172-72), pigment red zheleznodorolny( TU 6-10-602-74). Xylene oil (GOST 9410-78) - organic solvent.The composition for anti-corrosion coatings are produced by first the formation of two solutions: first, taken in the receptor number powdered polyvinyl chloride in the receptor number cyclohexanone, second, taken in the receptor number granulated polystyrene in receptor number of xylene, and then mix these solutions simultaneously with the copolymer based on the bottoms of the distillation of styrene, taken in receptor number, until a homogeneous film-forming base composition, and then mixed with filler and pigment, taken in receptor number, dispersed putelat in the container.The surface composition is applied by brush, spray gun or roller.The tests were carried out as follows.For definitions of indicators: the appearance of the film, elasticity, adhesion, hardness of the coating film preparation of test samples for the tests were carried out according to GOST 8832-76. On the steel samples of low carbon steel ART.C dimensions HH,8 mm using the paint was applied the following compositions: popular song-prototype options and composition the proposed composition in a single layer, followed by drying for 2 h at 60 - 65oC. the film Thickness after drying was 30 μm.The appearance was determined after cooling visually with diffused light. The definition of the elasticity of the film produced according to GOST 6806-78, the diameter of the rod on a scale of flexibility is 1 mm, the hardness of the films produced according to GOST 5233, section 1 on the glass plate. Determination of adhesion was carried out according to GOST 15140-78.To determine the index of chemical resistance of the film sample preparation for testing was as follows. Determination was made on the steel rods of cylindrical shape, one end of which is pivoted on a cone. Formed complex is osili prototype then one coat of varnish), drying each layer was carried out for 1 h at 20oC, and the last layer for 2 h at 60oC. the combined coating Thickness after drying was 60 μm. After drying the cone-shaped end of the rod was filled with wax to a height of 5 mm and the tests were made by immersing the rods in the acid solution.The invention is illustrated by the following examples of specific performance (see table. 1) and performance in the tests (see table. 2) appearance of the film, elasticity, adhesion, hardness. Performance when testing for chemical resistance are given in table. 3. Composition for corrosion-resistant coating comprising a copolymer on the basis of the bottoms of the distillation of styrene, xylene, filler, pigment, characterized in that it further contains polyvinyl chloride, polystyrene and cyclohexanone in the following ratio, wt.%:
The copolymer based on the bottoms of the distillation of styrene - 8 - 11
Polyvinyl chloride - 6 - 8
Polystyrene - 9 - 11
Cyclohexanone - 9 - 11
Filler - 13 - 15
The pigment is 5 to 7
Xylene - Rest
FIELD: varnish-and-paint industry.
SUBSTANCE: invention relates to paints based on polystyrene film-formers, which are used to protect metallic, concrete, ceramic, wood, and asbestos-cement surfaces against atmospheric corrosion in various industrial fields. Process comprises dissolution of polystyrene in solvent followed by stirring it with fillers and pigments while simultaneously affecting it by ultrasonic oscillations with frequency 150-250 kHz.
EFFECT: reduced polystyrene dissolution time, improved spreading capacity, increased (thrice) strength of film, and enhanced (twice) waterproofness.
SUBSTANCE: composition for finishing of concrete and plastered surfaces contains polystyrene in amount of 2.25-3.2 wt %, solvent in amount of 16-23.55 wt %, 22.81-25 wt % of chalk, as filler it contains mixture of sand and clay - colour sand in amount of 48.24-58 wt %, as surfactant it contains additive OP-4 in amount of 0.08-0.1 wt % and 0.37-0.4 wt % of disperser additive TELAZ.
EFFECT: increased adhesion and frost resistance of coats.
2 tbl, 5 ex
SUBSTANCE: polystyrene paint composition contains the following, wt %: film-forming agent - polystyrene or derivatives thereof 1-9, pigments 1-20, colloxylin 5-15, alkyd resins 10-15, plasticiser 1-15 and solvents - the balance.
EFFECT: obtaining coatings which provide high degree of protection from corrosion of components and surfaces in conditions of atmospheric exposure or exposure to a liquid or moist environment.
SUBSTANCE: polystyrene paint composition contains a film-forming agent - polystyrene and/or derivatives thereof, colloxylin, a solvent, pigments, a plasticiser, alkyd resins and additionally a dispersant.
EFFECT: obtaining a highly homogeneous coating which provides high degree of protection from corrosion of components and surfaces in atmospheric or liquid medium exposure conditions.
SUBSTANCE: invention relates to production of polymer compositions based on acrylonitrile butadiene styrene for coating articles made of wood and medium-density fibreboard, which provide effective protection from abrasive wear, aggressive moisture action, high chemical resistance to resol resins and esters.
EFFECT: improved surface quality, easy extraction of models and rods and recycling acrylonitrile butadiene styrene wastes produced by a 3D printer, curable at room temperature in a relatively short time.
FIELD: polyvinyl chloride-based plastisol for venturi chassis protective coats.
SUBSTANCE: claimed plastisol contains polyvinyl chloride, di(2-ethylhexyl)-phthalate; calcium stearate; plasticizer (e.g. product on the base of dioxane alcohols and high-boling ethers thereof); filler (e.g. honey); diluent (e.g. C14-α-olefins); polyamide resin; triethylene tetraamine; diethylene glycol; aerosil; calcium oxide. Plastisol of present invention has increased failure elongation by 2-3 times, tearing strength by 20-25 %, solid residual by 8 %, and decreased component mixing time by 2 times or more.
EFFECT: plastisols for protective coating with improved physico-mechanical characteristic; reduced effort.
FIELD: polymer materials.
SUBSTANCE: in polymer compositions, novel types of plasticizers comprising two ester groups in common with one secondary phosphonate group are used. Invention can be utilized in production of various polymer materials and coatings.
EFFECT: improved burning capacity (by several units) while basic complex of physico-mechanical, technological, and performance characteristics is preserved.
1 tbl, 6 ex
FIELD: protective coatings.
SUBSTANCE: composition contains perchlorovinyl resin, titanium dioxide filler, pigment , and solvent, wherein solvent is ethyl acetate or dichloromethane and ethyl acetate, or dichloromethane and acetone.
EFFECT: shortened drying time, simplified composition, and reduced toxicity.