The method of obtaining pentaftalevyh enamels

 

(57) Abstract:

The inventive method of obtaining pentaftalevyh enamels includes a mixture of film-forming pentaftalevyh varnish, pigment, stabilizing additives and a solvent, characterized in that the mixture of lead in high-speed mixer at the height of its filling, amounting 2-2,5 mixers, and first in the mixer load 70% varnish on the prescription of, and during slow rotation of gradually introducing the pigment or mixture of pigments, and then stirred at peripheral speed at the periphery of the disk mixer 15-18 m/s to milling degree 80-100 microns, while the mass ratio of pigment and varnish is 0.35 and 0.35, add the rest of varnish and again mixed, then the mixture was fed to the grinding in sisserou the mill at the rate of filling of 0.5-0.55 and after reaching the degree of dispersion of the grinding 20-25 μm mixture is sent to the mixer with impeller stirrer and a water jacket for cooling the injected solvent, flotation additive and mixed until homogenization and viscosity of 60 to 120 s, then enter a stabilizing additive - desiccant, again mix and after filtration serves on packing, with film-forming - pentaftalevye lacquer, pigment, camponents, wt. %: pentaftalevyh varnish PF-060 63,0-65,5, pigment or mixture of pigments 9,0-27,2, desiccant LCD 12 or 64 P 1,47-4,3, flotation additive (kremniiorganicheskie liquid) AF-2K or emulsol) 0.01 to 0.3, the solvent (white spirit) - the rest. The technical result - the development of new technologies for pentaftalevyh enamels when creating the optimum hydrodynamic and adsorption conditions for the formation of the paint product while improving the weather resistance of the coating and decrease the cost of production. Offer pentaftalevyh enamel designed for painting metal, wooden and other surfaces by spraying method, an inkjet drenching, dipping, brush. The resulting coating is resistant to temperature changes from -50 to + 60°C in temperate and tropical climate. 4 C.p. f-crystals, 2 tab.

The invention relates to methods for coatings and can be used to protect various surfaces from aggressive external impact and to make products of the appropriate appearance.

A method of obtaining pentaftalevyh enamel-based film-forming solution of an alkyd resin in a solvent and containing a pigment, a filler and stabil is to pentaftalevyh - 70

Pigment (Kronos lead lemon - 8.1, milori - 1.8, yellow iron oxide pigment - 8.1) - 18

The filler is talc - 11,1

Stabilizer-Aerosil - 0,9

However, this composition produced by conventional mixing the components, gives the enamel, unstable when stored and giving bad stir the sediment. In addition, Aerosil poorly dispersed in the mixture.

Also known is a method of obtaining petlewyh enamels by mixing the film-forming - pentaftalevye varnish, pigment, stabilizing additives and solvent (Livshits, M. L. , and other coating materials. Handbook, M. Chemistry, 1982, page 45, 50 - prototype).

However, the resulting pentalene enamel unstable during storage and lack of atmospheric resistance.

The objective of the invention is to develop new technologies for pentaftalevyh enamels when creating the optimum hydrodynamic and adsorption conditions for the formation of the paint product while improving the weather resistance of the coating and reducing the cost of production.

Offer pentaftalevyh enamel designed for painting metal, wooden and other surfaces by spraying method, an inkjet drenching, dipping, Ki is moderate and tropical climate.

The proposed technology includes conditions optimization of physico-chemical processes of wetting of the solid phase, separating the pigment agglomerates under the influence of the wedging action of the adsorption layers, the disaggregation of the pigment agglomerates due to shear mechanical force, the distribution of particles of the solid phase in a liquid medium, the stabilization of the pigment dispersion and obtain pentaftalevyh enamels, meet all the requirements of GOST 6465 - enamel-type PF-115, and, with the figures for the drying time and weather resistance of the paint coating is better than in the known methods.

The problem is solved in that the mixture of the starting components of the composition of the enamel are in a certain sequence, in appropriate units with certain characteristics and setting of the concrete within the processing parameters.

First, at high speed with diskinternal stirrer mixer (type BFD) download 12.8 - 35.8% pentaftalevyh varnish PF 060 from formulation and at slow rotation of gradually introducing the pigment or mixture of pigments, and then stirred at peripheral speed at the periphery of the disk-mixer 15-18 m/s to milling degree 80-100 μm, add the second condition of uniform and effective mixing is filling mixer on high, part 2-2.5 d (diameter) of the agitator. Formed in the mixer mass serves on pretir in a bead mill type MBS-50-KV-2 when the rate of filling of 0.5 - 0.55 and after reaching the milling degree of 20-25 µm mixture fed into the mixer with a turbine type agitator 0103-3.20 Salnikov seal and the water jacket for cooling the injected solvent, flotation additive and mix to a homogeneous state and a viscosity of 60 to 120 s, then enter a stabilizing additive - desiccant, again mix and after filtration serves on packing.

The optimal ratio of high-speed blender also include setting the height of the disk agitator on the bottom of the unit, which should be 1.0 d.

Correctly selected the design and operating parameters of the mixer provide high quality pigment suspension, and, therefore, marketable end products of a given dispersion.

In order received pentaftalevyh enamel satisfy its quality requirements of GOST for enamel PF-115, it must also meet the following specific original composition, wt.%:

Pentaftalevyh varnish PF-060 - 63,0-65,5

Pigment liquid or emulsion) - of 0.01 to 0.28

The solvent (white spirit) - Rest

As a pigment used industrial inorganic and/or organic dyes and colored silicates of calcium and coated barium sulphate (barites).

The dispersion of the pigment suspension in a bead mill type MBS-50-KV-2 depends from the properties of the pigment and on average, the necessary degree of dispersion of 20-25 μm is achieved for 15-45 min using grinding media (glass beads) with a diameter of 2-4 mm can also be used cascade bead mill type B1-0050, allowing to vary the total time of stay pigment suspension in the zone of dispersion.

The method is as follows.

Pentaftalevyh varnish PF 060 70% of the prescription content is placed in a high speed mixer with diskinternal (or discoubt) stirrer with optimal ratios specified above, and at slow rotation gradually enter the selected pigment or mixture of pigments, pre-sifted. The resulting mixture was stirred at peripheral speed at the periphery of the disk mixer 15-18 m/s to obtain particles of the solid phase with a size of about 80-100 μm, and the concentration of the TV is blowing the dispersion of the pigment suspension is carried out in a bead mill for 15-45 min with use parameters, above, to achieve the degree of milling - 20 - 25 μm, corresponding to the characteristics of the final product. Then the product is sent to the mixer with impeller stirrer and a water jacket for the introduction of other components: - solvent white spirit and flotation additive is a silicone liquid or aerosol, followed by stirring to homogenize and viscosity of 60 to 120 C. Then injected desiccant (LCD 12 or P) according to the recipe, again mix and after filtration of the finished product serves on packing. The mixing process must keep in strict compliance with the temperature - the temperature of the suspension should not exceed 40oC, because the increase in temperature significantly affects the quality of the enamel.

Received enamel fully meet the requirements of GOST 6455 enamel PF-115 1st grade on the following parameters:

color, viscosity, mass fraction of non-volatiles, drying time, film hardness by pendulum device, elasticity, tensile impact, adhesion, resistance of the coatings to the static action of water and 0.5% detergent, and coverage superior industrial materials.

In addition, seminum properties in accelerated climatic testing conforms to GOST 9.401.

Following are some recipes from a large number of options, allowing you to get on the proposed technologies enamel type PF-115.

White enamel, wt.%:

1) Varnish PF-060 (52%) - 65,50

Titanium dioxide - 25,09

Zinc white - 2,10

Desiccant LCD 12 - 4,30

Silicone additive AF-2K - 0,01

White spirit - Rest

2) Varnish PF-060 (52%) - 65,50

Titanium dioxide - at 8.36

The mixture of pigments on the basis of barium sulfate - 18,84

Desiccant LCD 12 - 4,30

Silicone additive AF-2K - 0,01

White spirit - Rest

3)Varnish PF-0.53 N (51%) - 64,0

Titanium dioxide - 6,50

Zinc white - 2,10

White painted aluminium silicate calcium - 18,70

Desiccant P TO 1.47

Silicone additive AF-2K - 0,03

1 white spirit - Rest

Green enamel, wt.%:

1) Lakp-060 (53%) - 63,06

CZK lead lemon - 24,82

Blue iron - 2,30

Desiccant LCD 12 - 2,96

Silicone additive AF-2K - 0,028

White spirit - Rest

2) Varnish PF-060 (52%) - 64,02

The mixture of pigments on the basis of barium sulfate - 26,34

Desiccant LCD 12 - 2,67

Silicone additive AF-2K - 0,028

White spirit - Rest

Cherry enamel, wt.%:

1) Varnish PF-060 ( blue phtalocyanine - 0,09

Desiccant LCD 12 - 2,96

Silicone additive AF-2K - 0,028

White spirit - Rest

2) Varnish PF-060 (52%) - 64,02

The mixture of pigments on the basis of barium sulfate - date 26,06

Desiccant LCD 12 - 2,67

Silicone additive AF-2K - 0,028

White spirit - Rest

The results of comparative tests of some enamels obtained the claimed method with the above formulations are presented in table 1. The tests were performed according to standard indicators of GOST 6465.

Effective replacement of industrial pigments in the manufacture of non-ferrous pentaftalevyh enamels type PF-115 under the proposed method on the painted aluminosilicates represented by the following several possible formulations and their effectiveness and compliance with the performance Standards shown in table 2.

Blue enamel, wt.%:

Varnish PF-060 - 64.0

Zinc oxide - 6.73

A mixture of colored silicates - 17.39

Desiccant P - 1.47

The emulsol - 0.3

White spirit - Rest

Bright green enamel, wt.%:

Varnish PF-060 - 64.0

A mixture of colored silicates - 26.48

Desiccant P - 1.47

The emulsol - 0.3

White spirit - Rest

Cherry enamel, wt.%:

Varnish PF-060 - 64.0
The emulsol - 0.3

White spirit - Rest

When assessing the economic efficiency of the use of colored silicates of calcium and barium sulphate as pigments in formulations pentaftalevyh enamels produced in industrial conditions, a reduction of consumption of titanium dioxide by more than 60%; lead crowns - more than 70%; organic pigments: blue and green phtalocyanines, lightfastness yellow, red 5s of azo pigments, scarlet and other concentrated to 85%. In costing enamel raw materials costs are reduced by half.

The proposed method for pentaftalevyh enamels reduces to 2 times the run time of full technological cycle for optimizing the processing of raw materials at each stage, thereby reducing the cost of finished goods is not less than 15%.

Thus, according to the proposed method it is possible to obtain high-quality paint compositions based on pentaftalevyh agent using different pigments, or mixtures thereof, including colored silicates of calcium and barium sulphate, which correspond to the physical-mechanism which show the stability of the decorative and protective properties ( on the results of accelerated environmental tests) in the outdoor atmosphere of temperate and tropical climate and therefore are recommended for industrial production.

1. The method of obtaining pentaftalevyh enamels, comprising a mixture of film-forming - pentaftalevye varnish PF 060, pigments, stabilizing additives and a solvent, characterized in that the mixture of lead in high-speed mixer at the height of its filling at 2 - 2.5 mixers, and first in the mixer load 70% varnish on the prescription of, and during slow rotation of gradually introducing the pigment or mixture of pigments, and then stirred at peripheral speed at the periphery of the disk mixer 15 to 18 m/s to milling degree 80 - 100 microns, while the mass ratio of pigment and varnish is 0.35 : 0,65, add the rest of varnish and again mixed, then the mixture is served on the ground in a bead mill at the rate of filling of 0.5 - 0.55 and after reaching the degree of dispersion of the grinding 20 - 25 microns, the mixture is sent to the mixer with impeller stirrer and a water jacket for cooling the injected solvent, flotation additive and mixed until homogenization and viscosity of 60 to 120 s, then enter a stabilizing additive - desiccant LCD 12 or 64 P, and again mix after filtration serves on packing, with film-forming - pentaftalevye lacquer, pigment, solvent, flotation additive, stabilizing 5,6

The pigment or mixture of pigments - 9,0 - 27,2

Desiccant LCD 12 or 64 P - 1,47 - 4,3

Flotation additive (kremniiorganicheskie fluid AF-2K or emulsol) - 0,01 - 0,3

The solvent (white spirit) - Rest

2. The method according to p. 1, characterized in that the height of the disk agitator on the bottom of the high-speed mixer is Id agitators.

3. The method according to p. 1, characterized in that the pigment used inorganic and/or organic dyes.

4. The method according to PP.1 and 3, characterized in that the pigment used colored silicates of calcium.

5. The method according to p. 1, characterized in that the size of the grinding bodies in the bead mill is 2 to 4 mm, and the milling time is 15 - 45 minutes

 

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