The method of obtaining polystyrene paint

 

(57) Abstract:

Describes how to obtain polystyrene paint by dissolving polystyrene in a solvent and mixing with plasticizers, pigments, dyes, fillers, additives. It differs in that the polystyrene pre-mixed with the plasticizer, pigments, dyes, fillers, additives and ekstragiruyut at 180-230C to get painted, then dissolve, mixing with a plasticizer. The technical result consists in the improvement process, reducing time at the stage of mixing, the reduction of volatile substances at the stage of drying, obtaining coatings with improved gloss. 3 C.p. f-crystals, 1 table.

The invention concerns the technology of paint and varnish materials, in particular based paints polystyrene film-forming, which protect metal, concrete, wood surfaces in various industries.

Known to produce polystyrene colors, where as the use of film-forming polystyrene [1. Protective paint coating. Reibman A. I. M. , "Chemistry", 1982, S. 78-79]. The essence of the methods of obtaining polystyrene beauty of the other. The prepared varnish is mixed with plasticizers, pigments, dyes, fillers, various modifying additives and used as a finished product for the application of protective coating (material) coating - paint. The quality of mixing (milling degree) depends on the quality of the paint coating. Therefore, at this stage, use special equipment: kraskoterke, bead mill, ball etc.

However, despite the measures taken long lasting stage of mixing (milling), polystyrene paint coating have a low luster.

The closest known is a method for polystyrene paint, according to which in a container equipped with a stirrer, download polystyrene in the form of dust or granules and an appropriate amount of solvent. The contents stirred until complete dissolution of polystyrene, enter the additives (plasticizer, corrosion inhibitor) and a filler, pigment(s). The mixture is stirred until a homogeneous mass [2.UA patent N3394, IPC C 09 D 125/06, C 09 D 5/08, publ. 27.12.1994, bull. RO N 6-1. Antikorozinis polistirolo composition. 3-4. UA patent N 5003, MKI C 09 D 3/733, C 09 D 5/08, publ. 23.08.94, bull. RO N 7-1. Warehouse proctoring pokreta. nedostatki specified way: the duration of the stage of mixing the filler and the additives (plasticizer-inhibitor-pigment) with polystyrene lacquer; the high content of volatile substances at the stage of drying, low lustre receive paint finish.

In an invention method of producing polystyrene paint the task is improving the process by changing technology, which consists in getting painted polystyrene dissolving, providing reduction of time at the stage of mixing/milling, the reduced content of volatile substances during drying, increase Shine to the finished product on the protected surfaces of metal, concrete or wood.

The task in the way to obtain polystyrene paint, carried out by dissolving polystyrene in a solvent and mixing with a plasticizer, filler, additive to the formation of the finished product according to the method, before the dissolution of get painted polystyrene by extrusion at a temperature of 180-230oC granules, beads or crushings polystyrene, pre-mixed with a plasticizer, such as medical vaseline oil, pigments, dyes, fillers, modifying additives, then painted polystyrene dissolved in the solvent when mixed with plasticizer, for example, from a mixture of dim which allows to reduce the time for mixing and pereir, to reduce the amount of volatile during drying, to increase the gloss of the coatings. This effect is due to the fact that in contrast to the known, the proposed method of obtaining polystyrene colors:

- is a better distribution of pigments, dyes, fillers and various additives in painted polystyrene by extrusion at a temperature of 180-230oC pre-moistened with a plasticizer to the surface of polystyrene in the form of beads, crushings or granules;

- dissolution painted polystyrene in solvents provides a sufficiently complete homogenization paint with a reduced content of volatile substances at the stage of drying and reducing the time for obtaining the finished product;

totality of technological methods leads to the improvement of physical-mechanical and performance.

This effect can be achieved by directly increasing the concentration of polystyrene or the introduction of modifying additives cannot, because the increased viscosity of the ink, which makes its processing and coating the surface.

The method is as follows.

In the mixer is loaded granules, beads or crushing of plasticized polystyrene and is h, is extruded in the extruder of the type ZSK at temperatures in the zones from 180 to 230oC. In a reactor with a stirrer (10 m3) capacity 7 t/d 3 h load: painted polystyrene (extrudate), plasticizer and solvent. The contents stirred until complete dissolution painted polystyrene 8 hours To test the obtained composition was applied on the sample surface (metal, wood, concrete), was dried at a temperature of 18-23oC. Samples with paint (paint) tested for resistance to impact - GOST 4765, hardness - GOST 5233. Define: glitter - GOST 896, mass fraction - GOST 17537, viscosity - GOST 8420, bending - GOST 6806, adhesion - GOST 15140, opacity - GOST 8784.

Example 1. To obtain polystyrene paint of white color in the mixer is loaded, for example: 57,5% (287,5 kg) polystyrene and 1% (5 kg) medical vaseline oil, mixed for 20 min, reload 40% (200 kg) of titanium dioxide and 1.5% (7.5 kg) of zinc stearate under stirring for 1 h, was extrudible at temperatures in the zones from 180-230oC. the Extrudate in the amount of 30% (2,149 t), which represents a polystyrene white in the form of strands size: d-3-5 mm, 1-4-7 mm, downloaded 3 hours in a reactor with a stirrer. There also downloaded 12% (0,812 t) with the obsessed was stirred 8 hours The test results presented in the table. The oligomer of styrene is a colourless liquid with a molecular weight of 600-1800, degree of oligomerization 4-5, residual styrene monomer is 0.1-0.5%, dynamic viscosity 220-270 JV, stable during prolonged storage.

Example 2. To obtain polystyrene paint beige analogously to example 1 was loaded polystyrene 58,5% (292,5 kg), medical vaseline oil 1%, titanium dioxide and 31.2% (156 kg), red iron oxide 2,9% (14.5 kg), yellow crown of 4.9% (24,5 kg) and zinc stearate 1.5 percent (7.5 kg). Next, analogously to example 1 (polystyrene beige color). The results in the table.

Example 3. To obtain polystyrene paint gray color as in example 1 was loaded polystyrene 58,5% (292,5 kg), medical vaseline oil 1%, titanium dioxide 33,44% of 167.2 kg), soot 0,86% (4.3 kg), red iron oxide 1,92% (9.6 kg), crown yellow 2,78% (13,9 kg) and magnesium stearate 1.5 percent (7.5 kg). Next, analogously to example 1 (polystyrene gray). The results in the table.

Example 4. To obtain polystyrene green paint as in example 1 was loaded polystyrene 58,5%, medical vaseline oil 1%, titanium dioxide 4,4% (2.2 kg), chromium oxide 34,6% (17.3 kg) and stearic acid 1.5 percent. Next analogies paint black as in example 1 was loaded polystyrene 77,5%, medical vaseline oil 1%, soot 6.6%, chromium oxide 13.4% and zinc stearate 1.5 percent. Next, analogously to example 1 (polystyrene black). The results in the table.

Example 6-the prototype. To obtain polystyrene paint white ball mill or mixer downloaded 20% (85 kg) polystyrene in the form of dust or granules and 75% (320 kg) of the solvent, for example toluene. The content was stirred for 2.5-3 hours to education 20% polystyrene lacquer (film-forming). In the mixer (ball mill) introduced from the measuring device plasticizer - 5% (28 kg), for example, dioctyl (dibutil) phthalate and mixed with varnish to 30 minutes Then loaded 20% (120 kg) fillers (pigments), such as zinc dust (titanium dioxide), for mixing and dispersion of 2.5 hours Received 510 kg (2.0 t/d) of the composition. Analogously to example 1 was applied to the samples tested (see table).

Example 7. For polystyrene paint beige analogously to example 6 was taken titanium dioxide 14,0%, red iron oxide and 1.0%, yellow crown of 2.0%, dioctylphthalate of 5.5%. The results in the table.

Example 8. For polystyrene paint gray, analogously to example 6, downloaded titanium dioxide 14,0%, red iron oxide and 0.4%, yellow crown of 1.1%, dioctylphthalate of 5.5%. The results in the table is and 1.3%, chromium oxide is 14.7%. The results in the table.

Example 10. For polystyrene paint black analogously to example 6 was taken 5% (28 kg) coal tar (a plasticizer, a pigment-inhibitor), soot 9,0%, chromium oxide 4,4%, was stirred 4 h Got paint 1.5 t/day. The results in the table.

Example 11 (control). Without extruding. In the mixer is loaded, for example 57.5% of polystyrene and 1% medical vaseline oil, mixed for 20 min, reload 40% titanium dioxide and 1.5% of zinc stearate under stirring for 1 h, then loaded into the reactor with stirrer 3 hours There, reload 12% of a mixture of dimer of alpha-methylstyrene with oligomer and 58% of solvent (xylene, toluene, mixtures thereof). The contents were stirred for 8 hours the Paint mixed. The results of the tests in the table.

Example 12 (control). Analogously to example 1 cooked extrudate in the amount of 30% was loaded with 12% dioctylphthalate (dibutyl phthalate) or (on other 5 - coal tar), and 58% of solvent (xylene, toluene, mixtures of solvents). Paint white and black without gloss, matte. The results of the tests in the table.

Example 13-14 (the beyond). In the mixer was loaded, for example 57.5% of polystyrene (crumbs, dust, crushing, granules, beads) and 1% of medicinei for 1 h, was extrudible at temperatures in the zones: 170-230oC or 180-250oC. the Extrudate turned out to be substandard, the polystyrene in the form of lumps with dyed surface. The contents were stirred for 8 hours the resulting composition does not meet the technical requirements on the sample surface grains, plant life, plasticizer and solvent in example 1.

Data presented in table show that upon receipt of polystyrene paint for the proposed method (examples 1-5 for different colors) compared to the prototype (6-10) the gloss of the coatings increases 2-8 times, the opacity has the best performance, increases in 3 times the performance, reducing the time for mixing/ pereir with 2.5 - 4 1.5 h, improving the degree of milling, decreases the amount of volatiles during drying of the coating. There is an opportunity to expand the color gamut that satisfies the demand of consumers, with the ability to receive the extrudate different colors.

1. The method of obtaining polystyrene paint by dissolving polystyrene in a solvent and mixing with a plasticizer, pigments, fillers, additives, characterized in that the polystyrene pre-mixed with plastificator painted, then is dissolved in a solvent, mixing with a plasticizer.

2. The method according to p. 1, characterized in that ekstragiruyut polystyrene in the form of granules, beads, crushings.

3. The method according to p. 1, wherein the polystyrene is mixed with a plasticizer, such as medical vaseline oil.

4. The method according to p. 1, characterized in that the polystyrene colored dissolved mixing with a plasticizer, a mixture of dimer of alpha-methylstyrene to styrene oligomer.

 

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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.

1 tbl

FIELD: construction.

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

FIELD: chemistry.

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.

2 ex

FIELD: chemistry.

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.

6 ex

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