The method of obtaining powder paint

 

(57) Abstract:

Usage: for protective and decorative coatings for concrete, plaster, brick, wood. The method of obtaining powder paint comprises mixing powdered components: an organic binder copolymers of vinyl acetate with ethylene and butyl acrylate, synthetic pigment (mechanically activated composite material consisting of natural pigment and filler) filler (calcium carbonate, talc, kaolin), thickener (methylhydroxyethylcellulose), non (fine powder composed of a mixture of silicone emulsion in paraffin mineral oil and calcium carbonate) in the hopper mixer, and then further mixing and capsulati 2-chamber mechanoactivated ball loading the first and second working chambers, respectively 25-35 and 35-55% within 1-3 minutes Technical result - the reduction of the duration of the process to reduce energy consumption for the production and improvement of the masking characteristics of the target product. 1 C.p. f-crystals.

The invention relates to the production of water-powdery polymer inks that can be and is">

A method of obtaining ink composition in the reactor is heated to 90-100oC water consistently load hydrated lime, white Portland cement, powdered sulfur, and zinc sulfate. Then, the resulting suspension is filtered, dried and calcined at 500-700oC. Get dry commodity composition with addition of 0.5% calcium stearate (Patent RU, C 09 D 5/03, 1997). The disadvantage of this method is the length of the mixing components, the use of high temperature calcination of the resulting composition, which leads to increased energy consumption in the production of this material.

Also known is a method of obtaining dry paint on mineral binder of the following composition: Portland cement, slaked lime, dolomite powder and pigment. The process of getting the paint used in this method consists of several stages: grinding the individual components of the paint, the components are mixed in dry form (J. "coating materials and their application", N 8, 1998, S. 57-58). The disadvantages of this method of obtaining dry paints include the duration and intensity of the production process, as well as low-painting-technical properties of the paints of this type, for example, the opacity is 350-400 is the crustacean leaves paint, includes dispersing the pigment in water emulsion of dibutyl phthalate and surfactant, followed by drying the obtained pigment paste at 90-95oC to a residual moisture content of 4% and mixing in a ball mill with dry polyvinyl acetate for 2-2,5 hours (Copyright certificate, SU, N 1381144, C 09 D 7/14, 1989).

The disadvantage of this method is the multistage getting powdered paint, and the duration of the production process.

The technical task of the invention to provide a paint composition of the powder components by mixing and encapsulation of the latter in dry form, as well as reducing the duration of the process of obtaining a powder paint, reducing energy consumption for the production and improvement of the masking characteristics of the finished product.

The technical result is achieved by the fact that, as the additives used powdered thickener and non, which is a mechanically activated mixture of silicone emulsion in paraffin mineral oil with calcium carbonate at a mass ratio of 17.3-18,6:81,4-82,7. Mixing of powder paint ingredients are in 2-camern the th camera 25-35%, and the second is 35-55% of the working volume of the chambers mechanoactivation while capsulata dye pigments and filler, an organic binder for 1.5-3 minutes First working chamber mechanoactivation provides additional mixing of the components of the powder paint, and the second for the encapsulation of pigments and fillers fine particles of powder polymer dispersions.

Obtained in this method the powder paint has the following composition, wt.%:

The organic binder - 25-40

Dye - 7-18

Filler - 40-67

Thickener - 0,5-1,0

The non - 0,5-1,0

As the organic binder in the paint use a different powder dispersions of copolymers based on vinyl acetate and ethylene and vinyl acetate and butyl acrylate.

As the coloring matter used inorganic or organic pigments have a wide colour range, preferably synthetic pigment is mechanically activated composition consisting of an inorganic pigment selected from the group comprising titanium dioxide, red micaceous iron, chromium oxide, etc. or organic pigment and filler, preferably, carb accordance with the patent of the Russian Federation N 2114885.

Filler are fine and easily dispersible calcium carbonate, talc, kaolin, barite.

As a thickener, you can use any powdered thickeners, preferably, methylhydroxyethylcellulose.

The method of obtaining powder paint is as follows.

In the hopper mixer load, the powder components inks: organic binder, a synthetic pigment, filler, various additives and with continuous stirring of the mixture components on the screw feeder is fed to the working chamber mechanoactivation where additional mixing powdered components of the paint and encapsulation of the pigment particles and organic binder filler - polymer powder dispersions. From the working chambers of mechanoactivation finish powder paint on the discharge pipe is supplied in paper bags. The inputs for production of 1 ton of material is 15 kWh

Before applying the powder paint is put in water in a ratio of water: powder of 1.2:1. The mixing is carried out manually or mechanically until a thick, homogeneous, not containing clots mass.

The following examples explain the present invention.

Example 1. Powder dispersion, representing a copolymer of polyvinyl acetate with ethylene, white synthetic pigment (mechanically activated composite material consisting of titanium dioxide and calcium carbonate in the ratio of 30:70 wt.%), calcium carbonate, methylhydroxyethylcellulose and non - powdery mixture, silicone emulsion in paraffin mineral oil, and calcium carbonate are mixed in the following proportions (by weight of.%): 35,0:10,0:54,0:0,5:0,5 in the hopper mixer, then the mixture is served in mechanoactivation and process for 3 minutes. Download grinding media is in the first compartment 25%, and the second 40% of the working volume of the chambers mechanoactivation, the oscillation frequency of the 75-1the amplitude of 50 mm, grinding media steel balls with a diameter of 10 to 17 mm, 40 g acceleration. The obtained powder paint knead in water in the ratio of water:powder of 1.2: 1.0 in. The water dispersibility of the coating composition is 25 μm, the ink 70 g/m2the drying time of 0.5 h, the resistance 28 days.

Example 2. Powder d is tengigabitethernet and non, mix in the following proportions (by weight of.%): 35,0: 10,0:58,5:1,0:0,5 in the hopper mixer, then the mixture is served in mechanoactivation and treated for 1.5 min, the processing conditions as in example 1. The obtained powder paint is mixed in water in the same proportions as in example 1. The dispersibility of the ink 30 μm, the flow rate of 700 g/m2the drying time of 0.5 h, the resistance 28 days.

Example 3. Powder dispersion containing a copolymer of vinyl acetate with ethylene, red synthetic pigment, represents a mechanically activated composite material consisting of red micaceous iron pigment and calcium carbonate in the ratio of 30:70 wt.%, the filler is calcium carbonate, methylhydroxyethylcellulose and non mixed in the following proportions (by weight of.%): 30,0:7,0:61,5:1,0:0,5 in the bunker-the mixer, the resulting mixture was fed into mechanoactivation and process within 2 minutes download the grinding media in the first chamber 30%, and in the second 45% of the working volume of the chambers mechanoactivation, other processing parameters, as in example 1. The obtained powder paint knead in water in the same proportions as in example 1. Dispersibility paint 25 microns, paint consumption of 60 g/m2the drying time of 0.5 hour is authorized in the literature.

The method thereof is as follows: liquid non - silicone wax emulsion in mineral oil it is mixed with calcium carbonate in the ratio of 17.3 to 18.6 wt.% emulsion and 82.7 - 81,4 wt.% of calcium carbonate. The resulting mixture was dried at room temperature for 12 h and then treated in mechanoactivated for 1.5-3 minutes, the Obtained product can be used in the manufacture of powder paints.

Example 4. Liquid non representing a silicone emulsion in paraffin mineral oil, mixed in a screw mixer with calcium carbonate in the ratio (wt.%): 18,0:82,0, the resulting mixture was dried for 12 hours under normal conditions and then treated in mechanoactivated for 1.5 minutes Ball download camera mechanoactivation respectively (%): 1-I camera - 25; 2nd camera - 35.

Obtained in this method the non is a fine powder.

1. The way to obtain a powder paint by mixing the powdered components of the coloring substances, organic binder, filler, and additives, wherein the additives used silicone emulsion in paraffin mineral oil with calcium carbonate at a mass ratio of 17.3 - 18,6 : 81,4 - 82,7 and mixing of the components is carried out in the double-mechanoactivated ball loading the first and second chambers 25 - 35% 35 - 55%, respectively, with simultaneous capsulata dye pigments and filler, an organic binder within 1.5 to 3.0 minutes

2. The method according to p. 1, characterized in that as the coloring matter used mechanically activated composite material on the basis of pigment and filler in a mass ratio of 30 : 70.

 

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FIELD: thermosetting coating materials.

SUBSTANCE: claimed material contains polyester with carboxylic functional group and/or polyacrylate with carboxylic functional group, β-hydroxyalkylamide in which part of hydroxyls are chemically blocked, and/or fillers, and/or heat setting agent, and/or triboadditives, and/or additives such as flow controlling agent and degasification agent.

EFFECT: material of improved degasification and flow characteristics.

6 cl, 1 tbl, 3 ex

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