Weather-resistant paint composition
(57) Abstract:The invention relates to the production of paint and varnish materials, in particular based paints polystyrene film-forming. Can be used to protect exterior metal, concrete, wood surfaces from atmospheric corrosion in various industries. Describes weather-resistant paint composition comprising a film-forming on the basis of a 20% solution of polystyrene in a solvent, plasticizer, pigments and modifying additive. It is different because, as a plasticizer contains a dimer of alpha-methylstyrene, as by the pigment as tattoo-modifying additive is a polymer of formaldehyde brand CFP powder with a particle size up to 20 microns and an oil absorption of up to 90 g/100g in the following ratio, wt. %: film-forming on the basis of a 20% solution of polystyrene in a solvent of 79.5; by the pigment as tattoo-modifying additive is a polymer of urea-formaldehyde brand CFP powder 4,5-7,5; plasticizer - dimer of alpha-methylstyrene 5,5; pigments - the rest. The technical result - the improvement of the coating by introducing as a modifier and filler certain number karbamidformal is the R and concrete surfaces, reduction of pigment and expansion of the range of the color gamut due to the receipt of bright colors. table 2. The invention relates to the field of production of paints, including paints based on polystyrene film-forming, can be used to protect exterior metal, concrete, wood surfaces from atmospheric corrosion in various industries.Known composition for the protective coating of metal products, including as a film-forming organic compounds: non-toxic polystyrene or copolymers based on styrene with butadiene and/or Acrylonitrile, the fillers are inorganic additives, solvents - toluene, solvent and xylene or mixtures of arbitrary composition in the following ratio of functional components, wt.%: the foaming agent 6-16, filler 6-14, solvent 70-88. [1. Patent of Ukraine N 23484A, IPC C 09 D 109/06, 5/08, published. 31.08.98, BI N4].Known composition to obtain paints and varnishes, in which the solvent of polystyrene are toluene, solvents, xylene, plasticizer - coal tar, dibutyl phthalate, dioctylphthalate, chloroparaffin, sovol, castor oil or mixtures thereof. For kind of blue. The resistance and hiding power is increased by the introduction of waste okislennogo catalyst with Tonino grinding 50 μm. [2. RF patent N 2017781, MKI C09D191/00, published. 15.08.94, BI N15 - 3. Patent of Ukraine N19264, publ. 25.12.97, RO N 6].Known corrosion-resistant polystyrene composition, including mass parts: waste polystyrene 15-16, coal tar 3.5 and 4.9, zinc powder 15-16, aluminum oxide 7-8, toluene 54,5-60,0. To increase the stability of the metal equipment of mines and enterprises of nonferrous metallurgy in aggressive environments, in particular 25% vapor of hydrochloric acid at 60oC enter the organic corrosion inhibitor in the amount of 0,016-0,02. [4. Patent of Ukraine N3394, IPC C 09 D 125/06, 5/08, published. 27.12.94, BI N6-1].Known coating and compositions have insufficient resistance to wooden and concrete surfaces to receive protective coatings with the desired hiding power consumption pigments increase; the presence of coal tar increases toxicity in the atmosphere and dark colors.The closest in technical essence and the achieved effect is the composition of the corrosion-resistant coating on the basis of polystyrene, where the solvent is used Tolu is verbal resin. [5. Patent of Ukraine N5003, MKI C 09 D 3/733, C 09 D 5/08, publ. 23.08.94; PV N31 - 6. A. S. USSR N 1523563, MKI C 09 J 3/12, Published. 23.11.89, BI N43 - prototype].The disadvantage of this structure is the lack of weather resistance of the coating, a high consumption of pigment in the coatings with the desired opacity and the impossibility of obtaining bright colors of paint due to the dark color of coal tar.The basis of the invention of weather-resistant paint composition of the task is improving the coverage by introducing as a modifier and filler certain amount of urea-formaldehyde polymer that enhance the protective properties of coatings on metal, wood and concrete surfaces, reducing consumption of pigment and expansion of the range of the color gamut due to the receipt of bright colors.The problem is solved due to the fact that the composition for weather-resistant paint composition comprising a pigment, a plasticizer and film-forming on the basis of a 20% solution of polystyrene according to the invention as a plasticizer contains a dimer of alpha-methylstyrene, optionally enter as modifying additives and pigment polymer to the m ratio of components wt %:
Film-forming on the basis of a 20% solution of polystyrene in a solvent - 79,5
By the pigment as tattoo-modifying additive is a polymer of urea-formaldehyde brand CFP-powder - 4,5-7,5
Plasticizer - dimer of alpha-mutilateral - 5,5
Pigments - The Rest.The polymer urea-formaldehyde brand CFP powder is produced by the interaction of urea-formaldehyde concentrate (20-24% urea and 54-60% formaldehyde) in an aqueous medium in the presence of acid catalyst at a temperature of 80oC, neutralizing the resulting suspension chalk or other alkaline reagent, filtering and drying the precipitate. This product is produced according to TU-05761 6143.021-99 or THE 3.01 Ukraine 013-93 or STP 51-98 "Polymer urea-formaldehyde".Improving weather resistance, enhanced color, reduced consumption of pigment with improved physico-mechanical characteristics of the proposed protective coating composition provides an introduction to the claimed limits of the urea-formaldehyde polymer stamps CFP powder with a particle size up to 20 microns and an oil absorption of up to 90 g/100 gThe procedure for preparation of the following composition. In a container with a stirrer download polystyrene and, accordingly, the dissolution of the polystyrene. In the obtained polymer solution add urea-formaldehyde and a plasticizer are mixed to obtain a homogeneous mass. The mixture is then reloaded in a ball mill or kraskoterke add the pigment(s) and reach a given degree of milling (TW-03-27-89-91). The resulting composition is applied to metal, concrete and wood surfaces of test samples, dried at a temperature of 18-23oC and are tested for weather resistance according to GOST 6992 as (Art. CMEA 1767-79) Coating of paint. Test method for resistance in atmospheric conditions. Decorative and protective characteristics after testing samples under atmospheric conditions is determined according to GOST 9.407-84 (Art. CMEA 5731-86) Coating of paint. Method of assessing appearance. The hardness of the film is determined using a pendulum device MI-3 according to GOST 6883. Adhesion is determined by the method of lattice cuts on GOST 15140. Bending of the film is determined according to GOST 6806. The strength of the film at impact is determined at the device-1A according to GOST 4765. Viscosity is determined on the viscometer B3-4 according to GOST 8420. Opacity is determined by the method of glass plates according to GOST 8784.Table 1 shows the formulation of the paint composition according to the invention (examples 1-9, 1, 4, 7 with the oxide CIN 20 TiO2, 12, 15 with zinc dust), prototype (examples 16-18), control (examples 21 and 22); table 2 - properties of coatings of these compositions.According to table 1-2 new members (examples 1-9), compared with the prototype (examples 16-18), provides improved weather resistance for decorative and protective indices from 2 to 1 score, 38-53% reducing the amount of pigment, there is a possibility of release and light tones of weather-resistant paint. Reducing the number CFP powder below the proposed ratios (examples 10-12) leads to deterioration of decorative figures to 2 points, increasing the number CFP powder above the proposed ratio (13-15) affects the viscosity, hardness and adhesion of the film. Use CFP powder with a particle size greater than 20 μm (example 19) leads to the appearance of visible grains on the surface, which impairs its decorative properties. CFP powder oil absorption of up to 100 g/100 g (example 20) reduces the hardness of the coating film to 0.22 srvc.ed. Replacement of plasticizer in the prototype (example 21K) improves the viscosity facilitates the application of the composition, reduces the toxicity, however, does not affect the protective properties and colors. The addition of the proposed modifier-filler to a known sotavuosina, includes film-forming on the basis of a 20% solution of polystyrene in a solvent, plasticizer, pigments and modifying additive, characterized in that the plasticizer contains a dimer of alpha-methylstyrene, as pigment-modifying additive is a polymer of formaldehyde brand CFP powder with particle size up to 20 microns and an oil absorption of up to 90 g/100 in the following ratio, wt.%:
Film-forming on the basis of a 20% solution of polystyrene in a solvent - 79,5
Pigment-modifying additive is a polymer of formaldehyde brand CFP-powder - 4,5 - 7,5
Plasticizer - dimer of alpha-methylstyrene - 5,5
Pigments - The 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.