SU1728270A1 - Method of obtaining silicate color - Google Patents

Abstract

This invention relates to silicate paints for metals, asbestos-cement sheets, concrete and other surfaces. The invention allows to obtain silicate paints with an abrasion resistance of 58 kg, a hardness of 0.78 sr. units, flexural strength 25 MPa, accelerated weather resistance 50 points, water resistance more than 880 h with reduced pigment consumption. The effect is achieved due to the fact that in the method of obtaining the silicate edge by a side grinding of the dry mixture and combining it with the liquid phase, a mixture of 50.0-55.5 May is used as a dry mixture. % silicate lumps, 41.0-45.0 May. % of painted industrial waste from the group that includes the battle of fireclay or chrome-magnetite refractories, the battle of glazed or unglazed porcelain-foundry products and pyrite cinders, and 3.5–5.0 May. % of the pigment, water is used as the liquid phase, and their combination in a mass ratio of 1: 2.5-1: 3.0 is carried out in an autoclave at 95-100 ° C for 1.0-1.5 hours. Table 5 .

Description

The invention relates to silicate paint formulations which can be used, for example, for painting metal, asbestos cement sheets, concrete structures and other surfaces.

The paint is known to include alumina-phosphate binder, titanium dioxide, silica, kaolin, inorganic pigment and water.

The disadvantage of this method is that it includes expensive components, as well as the need to pre-clean and etch the surface of asbestos cement sheets. Also known silicate paint, including liquid glass, is plasticized polyvinyl acetate emulsion.

silicon-containing fillers in the following ratio of components, May. %: Sodium liquid glass47-50

Plasticized emulsion PVA4-5

Ground granulated electrothermophosphoric slag 26-31 Ground cullet.7-9

Ground white wollastonite2- A

Pigments8-9

The disadvantages of this paint composition are the high content of pigments, the use of expensive plasticized emulsion of PVA. use of high modulus liquid glass.

The aim of the invention is to increase the water resistance, physico-mechanical

VI S 00

th VI o

coating properties and reduced pigment consumption.

The goal is achieved in that the paint containing crushed silicate lump, pigment and filler uses ground waste from porcelain industry or ground chamotte refractories, or ground chromo magnesite refractories, or pyrite cinders at the following equivalent. wearing components, may. %:

Silicate block 50,0-55,5

Filler41.0-45,0

Pigments3,5-5,0

Used industrial waste is used as a filler - ground combat of glazed or unglazed porcelain-fos products, or ground battle of fireclay fires, or ground combat of chromo-magnesite refractories, or pyrite cinders, which serve both as fillers and pigments. This makes it possible to reduce the consumption of pigments, broaden the color range of paints, improve water resistance and physical properties of the coating.

The proposed silicate paints are obtained by joint grinding in a ball mill or a silicate-clay disintegrator, a filler, and pigments.

Then, the prepared mixture is treated in an autoclave for 1-1.5 hours with hot (95-100 ° C) water in a ratio that provides the necessary consistency of the finished paint (1: 2.5-3.0) - depending on the method. its application to the surface to be painted. Joint grinding ensures the activation of the surface of particles of the paint components and an additional increase in the physicomechanical properties of the coatings.

The main parameters of the method of producing silicate paints, their properties and compositions are given in Table. 1 and 2.

An analysis of the tabular data shows that the optimum temperature range for treating paint in an autoclave is the range of 95-100 ° C (examples 2-4, table 1.2). Processing the paint at a temperature of less than 95 ° C leads to a deterioration of the fluidity of the paint, and obtaining paint at a temperature above 100 ° C affects the atmosphere and water resistance.

Reducing the processing time in the autoclave paint (less than 60 minutes) does not allow the composition to completely dissolve, which negatively affects the properties of the finished paint, and dissolving the coloring composition for more than 90 minutes accelerates the polycondensation processes, which

also worsens the atmosphere and water resistance. Thus, the optimal time interval for obtaining paint is 60-90 minutes (examples 7–9, table 1.2).

The production of silicate paint in a ratio of 1: 2.4 to water leads to a deterioration in viscosity, since the lack of water does not allow the paint to dissolve and react fully, increasing the water content is greater than the ratio 1: 3.0, although it provides the necessary ink fluidity, but deteriorates water and weathering performance due to the instability of the solution-filler system. Thus, the optimal paint-water ratio is 1: 2.5-3.0 (examples 12-14, tab. 1, 2). To obtain the paint, sodium (potassium) silicate is used, as well as alkali-resistant pigments — chromium oxide, ultramarine, yellow lead crowns, and other colors that do not change under the conditions of preparation, and then in the process of curing the silicate paint and coating service.

The crushed wastes of the ceramic and refractory industries can, during the preparation of the paint, accelerate the dissolution of silicate clumps in hot water, and during the curing process, interact chemically with sodium (potassium) silicate, initiating their polycondensation and forming a compound of the general formula on the surface of the pigment fillers used:

хА120з- (у + а) ЗЮ2-2Ре.20з

or

. (y + a) ЗЮ2-гРе20з- Сг20з- МДО.

Due to this, it is not necessary to add commonly used hardeners to the paint.

The chemical composition of silicate paint fillers is given in Table. 3

Paint on the basis of the proposed composition has good adhesion to the surface of asbestos cement sheet, concrete, other materials and can be applied by conventional methods - spilling, spraying, etc.

The invention is as follows.

550 grams of sodium silicate lumps and 410 grams of fireclay refractories are loaded into a ball mill, and 40 grams of ultramarine is also added thereto. The mixture is ground to 0.75-1 hours until the mixture is fully passed through the 0160 mesh. Then, the dry paint powder is placed in an autoclave with a stirrer and 2.5 liters of hot (95-100 ° C) water is added, stirred for 1-1.5 hours homogeneous state. In the color of paint 16-20 with a funnel VZ-4.

The prepared silicate paint solution is sprayed onto the surface of the asbestos cement sheet. The resulting coating is dried 10-15j iHH n pH 7JO-9Q0C, and then cured in a dryer at 15 b-180DS for OJS-lj.

Similarly, formulations of coatings are prepared and applied according to the formulas given in table. four.

Coatings are tested for abrasive resistance according to GOST 8747-83, hardness according to GOST 5233-77, flexural strength according to GOST 6806-73, accelerated weather resistance according to GOST 6992-68, crack resistance, water resistance, concentrated load. To assess the abrasion resistance, quartz sand blasting was performed until the coating penetrated to the substrate.

The test results of the proposed formulations of paint and the prototype are given in table. five.

From the data presented in table. 4 and 5, it can be seen that the compositions of 3-5 are optimal. They have high abrasion resistance: this indicator is 26-38% higher than that of the prototype.

The proposed formulations are characterized by high crack resistance and hardness.

Indicators of flexural strength, the value of the concentrated load from the stamp exceeds those of GOST for unstained samples, for example, for asbestos cement sheets by 1.2-1.3 times. These indicators of the proposed formulations are also higher than the prototype. Ha / ipn-mera, the strength indices of bending, as well as the concentrated load from the punch of the proposed formulations are 20% higher than that of the prototype.

The proposed formulations have higher rates of weather resistance and water resistance.

As follows from the analysis of tabular data, an increase in the dosages of ground silicate blocks leads to a deterioration of the physicomechanical parameters, as well as an excess consumption of sodium silicate blocks. An increase in the amount of filler in the paint composition, as well as a decrease in the dosage of silicate blocks, leads to a deterioration in the quality of the applied coating, a decrease in water resistance and abrasion resistance.

The proposed paint composition eliminates costly components, reduces the time required to prepare the paint composition, improves the physicomechanical parameters, expands the color gamut without increasing the consumption of pigments, and improves the weather resistance.

Formulas of the Invention A method of obtaining silicate paint by co-grinding a dry mixture and combining it with a liquid phase, characterized in that, in order to improve the water resistance and physicomechanical properties of the coating, to reduce the consumption of pigments, the mixture of the following composition, May, is used as a dry mixture. %:

Silicate Gl, 0-55.5

 Painted industrial waste, selected from the group that includes the battle of fireclay or chrome-magnesite refractories, the battle of glazed or unglazed porcelain-fusions, pyrite cinder41.0-45.0

Pigment3.5-5.0

Water is used as the liquid phase, and a dry mixture of the specified composition and water in a weight ratio of 1: 2.5-3.0 is combined in an autoclave at 95-100 ° C for 1.0-1.5 hours.

Table3

In the prototype, as USSR If 767154 and the composition of the paint includes sodium liquid glass

Table 5

Claims (1)

SUMMARY OF THE INVENTION A method for producing silicate paint by co-grinding a dry mixture and combining it with a liquid phase, characterized in that, in order to increase water resistance and physico-mechanical properties of the coating, reduce pigment consumption, a mixture of the following composition is used as a dry mixture, May. %: Silicate cob_ 50.0-55.5 'Painted industrial 30 glue waste selected from the group including fireclay of chamotte or chromomagnesite refractories, battle of glazed or unglazed porcelain and faience products, pyrite cinders 41.0-45.0 Pigment 3,5-5,0 40 water is used as the liquid phase, and the combination of a dry mixture of the specified composition and water in a mass ratio of 1: 2.5-3.0 is carried out in an autoclave at 95-100 ° C for 1.0-1.5 hours. Table 1 room Parameters Properties Temlerature, * C Time iin Dry paint to water ratio The viscosity of the prepared mixture, with Waterproof bone coating, h .... Weather resistance, score. 1 93 75 1: 2.5 27 600 46 2 95 90 1: 3.0 18 890 fifty 3 97 75 1: 2.5 20 890 fifty 4 100 60 1: 3.0 16 900 fifty 5 100.5 60 1: 3.0 16 620 47 6 95 58 1: 2.5 29th 590 45 7 95 90 1: 2.5 18 890 fifty 8 95 75 1: 2.5 17 890 fifty 9 100 60 1: 3.0 16 900 fifty 10 100 95 1: 3.0 16 620 47 eleven 95 60 1: 2.4 32 570 46 12 95 90 1: 2.5 18 890 fifty thirteen 100 75 1: 2.75 16 ' 920 fifty 14 100 60 1: 3.0 16 910 fifty fifteen 100 75 1: 3,2 17 600 47 Table 3 Storage device Composition, % Waste color SIO ^ AI2O3 Running MgO SggOz 1. Fight sha 50-67 28-45 5 -  - Gray motorized or- yellow imperfections > 2. Fight hro 9.3-11 9.3-11 9.3-11 42-65 7-15 Brown momagnes - zitovy refractory 3. Fighting- - - pink, zurovanny- brown, ny and Gray unglazed bathrooms porcelain and faience products 47-57 9-11 0,1 / 0,2 0.2-0.3 impurities Bordeaux, black 4. Pyrite 72 the rest is water ny cinders new T_a_b_l_i_d_a__4 Title and song numbers * _____ Content by composition, wt.% Prototype! 1 1 ^! μ L.L .. I ⁶ Ll „._ I Sodium (potassium) si-> licate block * 47 * 49.5 55 50,0 52.75 55.5 50,0 56.0 Fighting fireclay refractories - 45 40 45.0 43.0 41 46.0. 41.0 Ultramarine 9 5.5 5,0 5,0 4.25 .3.5 4.0 3.0 Ground granular electrothermophosphoric slag 31 - - - - • - - - Ground cullet 9 . Ground white wollastonite 4 II. Sodium (potassium) silicate block 49.5 55.0 55.0 52.75 52.0 50,0 56.0 Chromomagnesite Refractory Combat - 45.0 4o, 0 A 1.5 43.0 44.5 46.0 41.0 Crown Lead Yellow 5.5 5.5 3,5 4.25 3.5 4.0 3.0 III. Sodium (potassium) silicate block 49.5 55.0 55.5 52.75 51.5 50,0 56.0 Pyrite cinder - 45.0 40,0 41.0 43.0 45.0 46.0 41.0 Ocher 5.5 5,0 3,5 4.25 3,5 4.0 3.0 IV. Sodium (potassium. Silicate block) 49.5 55.5 54.0 52.75 51.5 50,0 56.0 Fight glazed porcelain and earthenware 45.0 40.0. 41.0 43.0 * 5.0 46.0 41.0 Marmot iron 5.5 4,5 5,0 42.5 3,5 4.0 3.0 V. Sodium (potassium) silicate block 42.5 55.5 54.0 52.75 51.5 .50.0 56.0 The battle of unglazed porcelain and earthenware 45.0 40,0 41.0 43.0 45.0 46.0 41.0 Lead-molybdate crown 5.5 4,5 5,0 4.25 3,5 4.0 3.0 * In the prototype USSR To 767154 sodium liquid glass is part of the paint Abrasion resistance, kg Prototype Rooms Compositions Table 5 compositions 'I 2 'P..... ' 1 ⁶ 1 7 I 42 47 48 57 58 56 fifty 49 II fifty fifty 57 58 57 51 fifty III 49 fifty 56 56 55 fifty 51 IV 48 49 54 55 55 fifty 49 V 48 47 54 54 53 48 49 Hardness CSS l. units I 0.74 0.72 0.72 0.74 0.75 0.75 0.71 0.71 II 0.73 0.72 0.76 0.78 0.76 0.72 0.72 III 0.71 0.72 0.74 0.74 0.75 0.71 0.71 IV 0.72 0.72 0.75 0.76 0.74 0.72 0.71 V 0.71 0.71 0.75 0.75 0 „74 0.71 0.72 Crack resistance, usl • I high (in) FROM IN IN in 0 0 FROM II in in in in IN in from III from from in in IN from from IV from in in in IN from from V from from .0 0 IN in from Strength at bending, MPa I 20.0 21.5 22.0 24.0 24.0 23.5 22.0 21.0 II 22.0 22.0 24.0 25.0 24.0 21.5 22.0 III 21.0 21.5 24.0 24.0 24.0 21.0 21.5 IV 21.5 21.0 23.5 24.0 23.5 21.0 21.0 V 21.0 21.0 23.5 24.0 23.5 21.5 21.5 Concentrated load from stamp , n I 22.5 24.0 24.0 27.0 27.0 27.5 24.5 24.5 II 25.0 25.5 27.5 28.0 27.5 25.0 25.0 III 24.0 24.5 27.0 27.0 27.0 ⁴ 24.0 24.0 IV 24.0 24.5 27.5 27.5 27.0 24.5 24.5 V 24.5 24.0 27.0 27.0 27.5 24.0 24.0 Weather resistance accelerated mode points I 46 48 47 fifty fifty fifty 48 48 II fifty 49 54 55 55 fifty fifty III 47 48 fifty fifty fifty fifty fifty IV 48 48 fifty . fifty fifty 48 47 V 48 48 fifty fifty fifty 48 48 Water resistance h I 240 480 600 More 880 600 480 II 720 720 More 880 720 720 III 480 600 More 880 480 600 IV 600 600 More 880 600 600 V 720 720 More 880 720 720