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INVENTION
Patent of the Russian Federation RU2272056

POLYMERIZEDSTEUM PAINT

The name of the inventor: Gromov Nikolai Nikolaevich (RU); Larionov Viktor Iosifovich
The name of the patent holder: Nikolai Nikolayevich Gromov (RU); Larionov Viktor Iosifovich
Address for correspondence: 410064, Saratov, ul. Lebedev-Kumacha, 71b, ap. 31, V.I. Larionov
Date of commencement of the patent: 2004.12.16

The invention relates to construction and building materials, in particular to paints for decorative protective coatings of building facades, mainly for concrete, wood, brick and asbestos cement. The paint contains 50% polyvinyl acetate plasticized dispersion, 50% limestone dough, pigments and additionally perchlorovinyl lacquer ХВ-784. The technical result is an increase in adhesion at positive and negative temperatures, an increase in water resistance.

DESCRIPTION OF THE INVENTION

The invention relates to construction and building materials, in particular to paints for decorative protective coatings of building facades, mainly for concrete, wood, brick, asbestos cement.

An oil paint based on linseed oil, pigment, filler, desiccant and solvent is known.

/cm. Oil paint brand MA-11n GOST 10503-71 /.

The main drawback of it is the high consumption of scarce expensive vegetable oil, a long drying time and low weather resistance, the impossibility of applying at large negative temperatures and low adhesion at negative temperatures.

From the substances of similar application described in the literature, the closest in composition is polymer-viscosity paint, weight:

/cm. Master of Construction of the USSR. Central Bureau of Technical Information. "Experience in the use of organosilicon substances in construction", M., 1971, p. 27 /.

Disadvantages of the paint are small adhesion at negative temperatures, low water resistance, long drying time at low positive temperatures, and low (up to -3) - (-5) ° C appearance of exits / white spots /, ie poor quality of the coatings obtained.

The objective of the paint to be solved is to increase adhesion at positive and negative temperatures, increase water resistance.

This is achieved by the fact that the polymer-viscous paint comprising a polyvinyl acetate plasticized emulsion / dispersion, a 50% limestone dough, pigments is characterized in that it further comprises perchlorovinyl lacquer XB-784 at the following component ratio,

For the preparation of polymer-polymer paint, a polyvinyl acetate emulsion was used, plasticized DF51 / 10C TU2241-028-00149274-97 JSC Kalininsky Rubber Products Plant in the Saratov Region. Polyvinyl acetate dispersion, plasticized with dibutyl phthalate. GOST 8728-66.

Perchlorovinyl varnish ХВ-784 GOST 7313-75.

Varnish ХВ-784 is a solution of chlorinated polyvinyl chloride resin in a mixture of volatile organic solvents with the addition of a plasticizer.

In varnish ХВ-784 resin PSX-LS of medium viscosity is used in the form of 10-25% solution in solvent P-4, and the softener is used in the amount of 0.3-0.5 parts by weight per 1 part by weight Perchlorovinyl resin.

/cm. M.L. Livshits, B.I. Pshyalkovsky. "Paints and varnishes". M .: Chemistry, 1982, pp.190-191, 211 /

The solvent P-4 of GOST 7827-74 contains, in mass%:

/cm. S.A. Drinberg, E.F. Itsko. "Solvents for paint and varnish materials." L .: Chemistry, 1980, p.60 /

Pigments: Iron wool GOST 8135-65,

Chromium oxide technical GOST 9808-65,

Ocher dry GOST 8019-71

Titanium dioxide pigment GOST 9808-65.

Construction lime GOST 9179-70 Ozinsky lime plant in Saratov region Lime of 1st grade, activity 90%, lumpy.

The adhesion and water resistance of the proposed paint and prototype paint was investigated.

For this purpose, 5 compositions of the proposed and one known paint with different content of components were prepared, which are summarized in Table 1.1., And physicomechanical parameters - in Table 1.2., And examples are given.

Example 1

In the tests, a polymer-coating (paint) of the following composition was used, mass parts: (concrete /

Preliminarily receive 50% lime dough by quenching the lime in the limestone silo and lime lime in the containers for two weeks.

Next, the calcareous dough is passed through a grid with 5 × 5 mm cells to remove large lumps from the dough, after which the dough is passed through a CD-110 disk copier.

The dispersion of DF51 / 10C is then poured into the stirrer, then poured into a mixer where the dispersion of DF51 / 10C, the perchlorovinyl varnish XB-784 and the pigment is placed, and the whole is mixed for 5 minutes at a speed of 60 rpm of the agitator shaft until a homogeneous mass is obtained. After the lime 50% dough is poured into the mixer and everything is mixed for 10 minutes until a homogeneous mass is obtained. After that, the contents of the mixer (mass) are passed through a disc paint kettle, a polymer-viscous paint, uniform in color and viscosity, is obtained, which is applied to concrete samples at T = 20 ° C in the open air and at T = -5 ° C, T = -10 ° C , Т = -15 ° С, Т = -20 ° С in the refrigerating chamber ТУ-1000У with the help of a mug-sprayer and leave the samples in the chamber at the same temperature for 3 days, and then check for separation on the breakaway PM250 machine at speed Loading of 25 mm / min and calculated by the formula

Where P is the breaking load,

F is the area of ​​separation of the coating.

The strength of the adhesion of the paint is determined by the peeling test of 8-10 dies pasted on top of the paint with fast-setting mastic based on epoxy resin ED-20 cured with polyethylene polyamine, cement, taken in a ratio of 10: 1: 3 by weight.

The distance between the stamp and the edges of the specimen should be at least 2 cm. 24 hours after curing, the paint / coating / mastic is cut along the perimeter of the die to the base, and not earlier than 2 days, the adhesion strength is determined at a constant rate of force change in the device of 10 ks /from.

The strength of the adhesion of the coating is taken from the average arithmetic of 8-10 detachments.

Applied equipment.

Tearing machine PM250.

A stamp / round steel plate with a smooth, non-fat surface, with a diameter of 20 mm, a height of 10 mm with a hole into which the steel rod of the device is inserted - 10 pieces.

Substrate (20 × 20 mm), covered with paint.

After the peel test, the paint samples with concrete showed adhesion after 3 days, MPa:

The water resistance of the paint is determined as follows.

Preparation of samples for testing.

The test paint is applied with a paint sprayer in one layer onto a clean plate of black tin according to OST 10086-69 "Methods for testing paint and coating materials and coatings", M.I.16. "Methods for producing a film on a substrate" and dried first for 1 hour at 18-22 ° C and then for 2 hours at a temperature of 65-70 ° C, then the plate is placed on 2/3 of the height of the coating in distilled water and Is held for 2 hours at a temperature of 13-22 ° C. Then the plate is removed, wiped with clean cotton and held in air for 2 hours, after which the inspection of the appearance and color of the film is performed.

The plate was coated with a polymer-based paint of the following composition: mass parts:

The appearance and color of the film remained unchanged.

Example 2.

The test is carried out as in Example 1.

In the tests, a polymer-based paint / coating / of the following composition was used, parts by mass: / concrete /

After the peel test, the paint samples with concrete showed adhesion after 3 days, MPa:

Water resistance: appearance and color of the film unchanged.

Example 3.

The test is carried out as in Example 1.

In the tests, a polymer-based paint of the following composition was used, mass parts / concrete /

After the peel test, the paint samples with concrete showed adhesion after 3 days, MPa:

Water resistance: appearance and color of the film unchanged.

Example 4.

The test is carried out as in Example 1.

In the tests, a polymer-based paint of the following composition was used, mass parts / concrete /

After the peel test, the paint samples with concrete showed adhesion after 3 days, MPa:

Water resistance: appearance and color of the film unchanged.

Example 5.

The test is carried out as in Example 1.

In the tests, a polymer-based paint of the following composition was used, mass parts / concrete /

After the peel test, the paint samples with concrete showed adhesion after 3 days, MPa:

Water resistance: appearance and color of the film unchanged.

Example 6 / Prototype /

In the tests we used polymer-based paint of the following composition, in weight: polyvinyl acetate plasticized 50% emulsion - 14, 50% limestone dough - 56, GKZh-10 or GKZh-11 - 3, color pigment - / chromium oxide / 7, water - 20. Initially, pigments are mixed in a mixer with water. The resulting paste is grinded on a disc paintbrush / up to a consistency of no more than 20 μm by micrometer. The emulsion of PVA, GKZh, limy dough, pigment paste is loaded into the mixer tank and stirred for 1 hour. Before unloading, the viscosity of the paint is checked / 20-25 sec by viscosimeter VZ-4 /. The paint is then filtered through a 900 mesh / cm2 sieve.

The test is carried out as in Example 1.

After the peel test, the paint samples with concrete showed adhesion after 3 days, MPa:

Water resistance: the appearance and color of the film after the tests at T = -5 ° C has changed, the color of the film is white / 80% /.

The flow of adhesion processes occurs at negative temperatures, due to the alkaline medium formed by lime, and by volatilization of light fractions, solvents P-4, which create the conditions for the formation of structures.

Lime / with high dispersion / with PVA, reinforced with polymer binder / polyvinyl chloride resin / predetermine high adhesion strength.

The content of perchlorovinyl lacquer is less than 1 part by weight. Leads to a decrease in adhesion at positive and negative temperatures.

The content of perchlorovinyl lacquer is more than 7% by weight. Leads to cracking of the coating at negative temperatures and to a decrease in adhesion.

The use of the invention makes it possible to increase the volume of paint production at existing capacities / lines / because of its year-round output, i.e. To increase the volume of finishing works, to reduce specific capital investments during storage and transportation.

CLAIM

A polymer-viscous paint comprising a polyvinyl acetate plasticized 50% dispersion, 50% limestone dough, pigments, characterized in that it further contains perchlorovinyl lacquer XB-784 at the following component ratio,

print version
Date of publication 01/18/2007

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