Surface coating solution

FIELD: chemistry.

SUBSTANCE: invention relates to preparation of surface coating solutions which contain boehmite. The surface coating solution is a latex paint and contains a trituration solution, a polymer emulsion and a solvent. The trituration solution is prepared using an active solution which contains a base in form of an aqueous solution and boehmite particles contained in the base. The boehmite particles are anisotropic moulded particles having mould ratio of 3:1 and are activated by substances selected from a group which includes ammonium hydroxide, alkali- or alkali-earth metal salt, nanoclay or colloidal silica. The surface coating solution has surface spreading and distribution with formation of a uniform film of at least 6 mil, and sag resistance of over 7 mil or surface spreading and distribution with formation of a uniform film of over 6 mil, and sag resistance of at least 7 mil. Described also is a method of preparing the surface coating solution involving the following operations: activation of boehmite particles with substances selected from a group which includes ammonium hydroxide, alkali- or alkali-earth metal salt, nanoclay or colloidal silica in order to form a water-based active solution; preparation of a trituration solution using the active solution; and preparation of a surface coating solution using the trituration solution, polymer emulsion and solvent.

EFFECT: solution enables to obtain coating with good technical properties.

42 cl, 2 tbl, 3 dwg, 2 ex

 

The technical field

The present invention in General relates to the creation of solutions for surface coatings and methods for their preparation, and in particular, relates to the creation of solutions for surface coatings, containing boehmite.

The level of technology

Solutions for surface coatings are used in various applications, including paints, tools, surface protection and adhesive solutions. Such solutions for the coatings can be applied using various application techniques, including by spraying, coating by dipping (immersion), and applying by brush or roller, and the composition of the solutions is usually chosen so as to optimize the planned technology application. The wrong choice of composition can lead to undesirable textures, traces from the instrument application, and stains and the formation of droplets of the solution for coating the surface during application. It particularly relates to compositions of water-based coatings, such as latex solutions to cover the surface.

An example of a latex composition for coating described in U.S. patent No. 5,550,180. Latex composition (or composition) contains, as a rheology modifier, bemany alumina having a crystal size (020 plane) approximately less than 60 angstroms and the surface area of the STI, during annealing up to gamma phase, approximately more than 200 m2/, Boehmite is present in an amount sufficient to modify the rheological properties of the composition so as to have a relatively high viscosity at low shear and a lower viscosity at high shear.

Despite progress in the choice of the solution composition for coating the surface, continues to be a need for cost-effective solutions for surface coatings having desirable resistance against stains, desirable characteristics of the spreading and distribution over the surface with the formation of a smooth film, and the desired recovery time viscosity. Thus, it is desirable to create superior solutions for surface coating.

The invention

The first variant of the present invention is directed to solution for coating surfaces with water-based solution for coating surfaces and activated particles of boehmite, which is the basis of the solution for coating surfaces. Particles of boehmite mainly represent anisotropic fasanolandia particles having a shape factor of at least 3:1.

Another variant of the present invention is directed to solution for surface coating containing particles of boehmite, which represent g is awnym way of anisotropic fasanolandia particles, having a shape factor of at least 3:1 and the maximum size of at least 50 nm.

In accordance with the present invention a method of preparation of the solution for coating surfaces. The method includes activating anisotropic fashioning of boehmite particles having a shape factor of at least 3:1, to form the active solution, the formation of rubbing solution using active solution and the formation of the solution for coating surfaces using rubbing solution.

Brief description of drawings

Figure 1 shows the stability rheology for approximate variants of solutions for coating according to the invention.

Figure 2 shows the dependence of viscosity on shear for solutions to cover.

Figure 3 shows the resistance against stains (on Leneta) for solutions to cover.

Detailed description of the invention

In accordance with the first embodiment of the present invention, it is proposed a solution for coating, which provides the basis of the coating solution and the particles of boehmite, which is the basis of the coating solution. The boehmite particles are anisotropic fasanolandia particles having a shape factor of at least 3:1, and contain needle-like and plate-like particles, as well as their com is inali.

The basis of the solution is water and may include latex paints, such as acrylic emulsion, modified styrene acrylic emulsion and polyvinyl acetate emulsion. In addition, the solution and the base solution can be recovered water alkyd solution. The solution can be used for application indoors and outdoors, and includes architectural coating or coatings for industrial maintenance applications running in the easy mode.

The solution has properties such as resistance against stains or characteristics of the spreading and distribution over the surface with the formation of smooth films are desired for specific applications.

The term "boehmite" is usually used to refer hydrates of alumina, including mineral boehmite, which usually corresponds to the formula Al2O3H2O and has a water content of about 15%, and pseudoboehmite having a water content of more than 15%, for example, 20-38% by weight. Although technically pseudoboehmite usually has more than one mole of water per mole of aluminum oxide, in the literature often use the term "monohydrate alumina" to describe pseudoboehmite. So here the term "monohydrate alumina" is used to describe pseudoboehmite. Particles monohydrate is xida aluminum can be colloidal form, and then they are called colloidal particles monohydrate alumina (HIMSELF). Particles of boehmite mainly represent anisotropic fasanolandia particles such as acicular or lamellar particles which are dispersed in the base coating solution.

In accordance with one variant of the invention uses particles of boehmite, which contain anisotropic, needle crystals having a largest dimension of at least 50 nm, mostly from 50 to 2000 nm, and even better from 100 to 1000 nm. Each of the dimensions perpendicular to the length, usually less than 50 nm. The shape factor, defined as the ratio of maximum size to the next largest size, perpendicular to the largest size, is typically at least 3:1 and is preferably at least 6:1. In addition, needle-like particles can be characterized using secondary shape factor, defined as the ratio of the second largest to the third largest size. The secondary shape factor is usually no more than 3:1, usually not more than 2:1, and often is about 1:1. The secondary shape factor usually describes the geometry of the cross-section of a particle in the plane perpendicular to the greatest dimension

Needle-shaped particles can be obtained through the EXT is the R hydrothermal conditions, in combination with relatively low levels of seed and acidic pH, which leads to preferential growth of boehmite along one axis. Longer hydrothermal treatment can be used for even longer and have a higher form of acicular particles of boehmite. Acicular particles have a surface area, measured by BET method, comprising at least 75 m2/g, and mostly at least 100 m2/g, for example 250, 300 or even 350 m2/year

Such needle-shaped particles can be obtained by the method described in application for U.S. patent No. 2003/0197300 A1.

While in some embodiments using the above-described acicular particles of boehmite, in other embodiments, use of lamellar particles of boehmite. Lamellar particles are typically crystals having the size of the front surface, of at least 50 nm, mostly from 50 to 2000 nm, and even better from 100 to 1000 nm. Regional dimensions perpendicular to the front surface, are usually less than 50 nm. The shape factor, defined as the ratio of maximum size to the next largest size, perpendicular to the largest size, is typically at least 3:1, and mostly at least 6:1. In addition, the opposite chiefly to the e surface particles are generally flat and parallel to each other, which further defines the lamellar morphology of the particles. Lamellar particles can further be characterized as having a secondary shape factor is approximately more than 3:1. Lamellar particles typically have a surface area, measured by BET method, comprising at least 10 m2/g, and mostly from 70 to 90 m2/year

Lamellar particles can be obtained by using hydrothermal treatment of the source material in the form of trihydroxide aluminum saturated with seed crystals of boehmite. In the working example, the autoclave was loaded 7.42 lbs of trihydroxide aluminum Alcoa Hydral 710; 0.82 pound of pseudoboehmite SASOL Catapal B; 66.5 pounds of deionized water; 0.037 lb potassium hydroxide; and 0.18 lb 22 wt.% nitric acid. Boehmite was pre-dispersed in 5 pounds of water and 0.18 pounds of nitric acid previously added trihydroxide aluminum, the rest of the water and potassium hydroxide. The autoclave was heated to 185C for 45 minutes and this temperature was maintained for 2 hours, under stirring (content) with a speed of 530 rpm Autogenous pressure produced reaches a level of about 163 pounds per square inch and maintained at this level. After that, the dispersion of boehmite was removed from the autoclave and removing the liquid (dispersion) at a temperature of 65C. the resulting mass unwinding diameter is ivali to particle size less than 100 mesh.

Particles of boehmite can be individually and uniformly dispersed in the solution for surface coating containing polar solvents and/or polymers, without special treatment, the surface of the boehmite particles, to enhance the dispersion. However, the surface treatment can impart unique properties to the solution, for example, lead to modification of rheology, and therefore desirable in some applications. For example, water based mud, which contain particles of boehmite with surface treatment, can have a high viscosity low shear and relatively low viscosity, high shear, and the range of high and low viscosity at different shear condition is greater than that for solutions containing not treated particles of boehmite. Surface treatment of the particles of boehmite may consider adding alkali and alkaline earth sulfates such as magnesium sulfate and calcium sulfate, and ammonium compounds such as ammonium hydroxide. In one exemplary embodiment, the high shear viscosity does not exceed 50% of the viscosity low shear, for example, does not exceed 30% viscosity low shear. Viscosity low shear can be measured, for example, at 10 rpm, and the high shear viscosity can be measured at 100 rpm

In the solution of boehmite particles, such as particles of colloidal Manager is one of aluminum oxide, can be approximately from 0.1% to 20% by weight of the coating solution. For example, particles of boehmite can be approximately from 0.5% to 10% by weight of the solution, or, in another example, may be approximately from 0.5% to 2% by weight of the solution. The solution can have a basic pH, such as pH more than 7, for example a pH of at least about 7.5, 8.0 or higher.

The solution for surface coating may also contain thickeners, water-based, such as clays (e.g., nanoglide Actigel-208), hydroxyethylcellulose (NES) and the modified ONE, and other rheology modifiers for water-based. However, in accordance with the special option, the coating solution contains no connect (associate) thickeners, such as QR-708. Connecting thickeners are components that are connected with the polymers in solution and form complexes with polymers.

During the filling of the anisotropic fasanolandia particles of boehmite coating solution can obtain the desired characteristics, such as resistance against stains, spreading and distribution over the surface with the formation of a smooth film, as well as recovery time. Resistance to stains (on Leneta), measured using test method ASTM D4400, can be from 7 to 12 mils. In exemplary embodiments, habit is epostl against stains (on Leneta) can be from 8 to 10 mils. The spreading and distribution over the surface with the formation of a smooth film, measured using test method ASTM D2801, usually greater than 6. In exemplary embodiments, the spreading and distribution over the surface with the formation of a smooth film is approximately from 6 to 10, for example approximately from 6 to 7. The recovery time can be characterized by using the viscosity of the coating solution. In accordance with one variant, the coating solution restores 80% viscosity low shear (10 rpm) for a time approximately less than 15 seconds.

The drying time was measured using test method ASTM D1640. The coating solution typically has a drying time before solidification to touch in less than 30 minutes. In exemplary embodiments, the measured drying time before hardening to a tack-free surface is from 8 to 15 minutes, for example from 8 to 10 minutes.

Let us now turn to the method of formation of the solution. The solution for coating surfaces can be formed by activating solution of boehmite particles, such as particles of colloidal aluminum monohydrate, with the formation of the active solution. The activating solution typically results in a solution with a reduced shift, such as the solution rheological trend, described later in Example 1. One possible mechanism of activation solution and concomitant modification of the rheology is the modification of surface properties of particles of boehmite, for example, due to the formation of salts with surface nitrates on the particles of boehmite. In one embodiment, the addition of amines activates particles. For example, ammonium hydroxide may be added to the solution to increase the pH and to activate the particles of boehmite. I believe that this is a result of the formation of soluble Quaternary ammonium salts of the residual nitric acid present in the samples. Alternatively, it may be used salts of alkali and alkaline earth metals such as magnesium sulfate and calcium sulfate to activate the solution of boehmite. In another example, clay thickening, such as nanoglide, can be used to activate the particles of boehmite. In another example, the colloidal silica is added to the activated particles of boehmite. The activation can be carried out by adding soil particles having a surface charge opposite to that of the particles of boehmite (for example, colloidal silica is negatively charged and therefore it interacts with the positively charged particles of boehmite). In accordance with a particular example, ammonium hydroxide, which improves the stability of the latex solutions based emulsion, it is desirable to use some latex solutions.

The efficiency of activation depends on the contract is to maintain its look. In accordance with one variant, the boehmite is added to the basis of the solvent previously the introduction of the activator. For example, boehmite first added to the water, then enter the ammonium hydroxide. This technique allows to obtain a higher viscosity and higher stability of the solution than the reverse order of operations, namely adding the first ammonium hydroxide in water solution, followed by input of boehmite.

The activated solution is further used for the formation of rubbing solution. The term "rubbing solution" usually refers to the intermediate solution having a high concentration of pigment and other active components. Rubbing the solution is usually prepared using ingredients that are durable and can withstand high shear rate applied during the formation rubbing solution, and usually contains defoamers, pigments, pigment dispersant and wetting. Components mixing, such as fillers, can also be added in solution or rubbing previously cooking rubbing solution. Components mixing can be fiberglass, aluminum trihydrate, submicron particles of alpha alumina, silicon dioxide and carbon. Rubbing the solution is usually diluted to form a solution for coating of surfaces, including SEB is rubbing the solution, additional solvent and polymer emulsion, such as latex or acrylic. Usually, shear sensitive ingredients (for example, fragile components that cannot withstand the conditions of high shear) is added during preparation of the solution for coating the surface. One example of emulsion paint is glossy white enamel Maincote HG-56, manufactured by Rohm & Haas.

EXAMPLES

The following examples use the boehmite particles formed due to persecution solution using a 10% by weight of the seed particles of colloidal monohydrate alumina, which are referred to herein as HIMSELF 9010.

Example 1

The vessel was loaded 270 g of tap water having a pH of 8.04. Added thirty (30) g HIMSELF 9010 and was stirred for 15 minutes. If the pH of the solution fell to 4.41. The ammonium hydroxide was added to this mixture until then, haven't seen the thickening. The ammonium hydroxide in this example is mainly volatile amine, as it is usually used in the emulsion water-based coatings. The thickening or gel formation occurs after the addition of 0.56 g of 28% ammonium hydroxide. The amount of ammonium hydroxide was brought to the level of 0.187%, calculated on the total weight, or up to the level of 1.87%, calculated on the weight of the boehmite. Received "activated" 10% HIMSELF 9010 preliminary gel had p is 7.29. The ratio of the viscosity low shear to high shear viscosity of this mixture, as well as the relative speed of recovery after 15 sec, comply with the following:

The spindle/rpmCP
#6 @1023,000
#6 @1003,950
#6 @10 after 15 seconds of recovery19,500

It can be assumed that the ammonium hydroxide reacts with residual nitric acid on the surfaces of particles of boehmite, which leads to the increase of pH and solution viscosity. Figure 1 shows the flow profile at the end of time from 2 to 72 hours after preparation. The rheology of the solution becomes stable after 72 hours after cooking.

Example 2

Was selected polymer system for the study of acrylic emulsion Rohm & Haas' Maincote HG-56 designed to prepare primers and weatherproof top coatings for industrial maintenance applications, operating in the range from light to moderately heavy. The composition of Maincote HG-56 was selected as the standard for comparison. Manufacturers recommend the use of Acrysol QR-708 for thickening of the composition, the number is 2 pounds per 100 gallons of the coating material.

Test solutions was performed using the composition of the thickener, containing 100% of HIMSELF 9010, the mixture ITSELF 9010 with nanoglide, or 100% Acrysol QR-708. In mixes HIMSELF with nanoglide use part of the inherent HIMSELF acidity and a dispersant of the pigment to activate nanoglide. Test was performed ammonium salts Tamol 850, which provides partial activation nanoglide. Has also been tested sodium Tamol 731, which works much better. Activating nanoglide occurs when there are sources of metal, such as sodium, calcium or potassium.

HIMSELF 9010 easily activated by adding ammonium hydroxide to the selected composition. One pound of ammonium hydroxide, which is used in the composition to ensure its stability, is more than sufficient to enable even higher levels of the download ITSELF 9010.

Final preparation of the coating material begin using 20 pounds full of thickener. Boehmite, the number of which is specified below as the percentage of 20 pounds, introducing 123.2 lbs of deionized water. One pound of 28% ammonium hydroxide solution is added to the solution. Then add the thickener nanoglide to form the residue of a mixture of thickener. In addition, add 1.5 pounds of antifoam Drew L-405, 11.1 pound of pigment dispersant Tamol 731, 1.5 pounds of wetting pigmentation treatment the NTA Triton CF-10 and 195 pounds rutile titanium dioxide Ti-Pure R-706. This forms a rubbing solution, which is added to cover the drug containing 523 lb Maincote HG-56, 4 pounds of a 25% ammonium hydroxide solution, 40 pounds of benzyl alcohol, 15 pounds of dibutyl phthalate, 2.5 lb Foamaster 11 and 9 pounds 15% solution of sodium hydroxide in water. These compounds are listed below as TEW-463. The second composition, which is obtained in accordance with known practice of using a thickener Acrysol QR-708, specified hereinafter referred to as the TEW-464.

Formula No.The composition of the thickener
TEW-463-225%: 75% ITSELF 9010 to nanoglide weight
TEW-463-350%: 50% HIMSELF 9010 to nanoglide weight
TEW-463-475%: 25% HIMSELF 9010 to nanoglide weight
TEW-463-5100% HIMSELF 9010 weight
TEW-464Acrysol QR-708 standard

In each part, except for the QR-708 standard, known potential activators in coating materials include ammonium hydroxide for pH ITSELF 9010 and boehmite, the pigment dispersant Tamol 731 and sodium nitrite as a quick corrosion inhibitor for nanoglide.

Laprovence each coating was applied using a device Bird Bar at a dry film thickness of 2.5-3.0 mils, with a given viscosity of the coating, without a decrease in pH. Experts know Bird Bar as a device for obtaining samples of the tested film. The substrate selected for conducting various tests used a bar of cold rolled steel. To test the resistance against stains, spreading and distribution over the surface with the formation of a smooth film, etc. used sealed card Leneta (Leneta). Then left the coated panel for 14 days for drying and curing at room temperature conditions of 72 F and 45% R.H.

Evaluation of the effectiveness of the thickener and the impact of the thickener on the characteristics of the coatings produced using the following test methods:

Viscosity (K.U.)ASTM 0562
Viscosity (centipoise)ASTMD2196
Viscosity (ICI)ASTM D4287
The spreading and distributionASTM D2801
Resistance to stains (on Leneta)ASTM D4400
The film thickness (DFT)ASTM d 1186
Speed the drying ASTM d 1640
The development of hardnessASTM D3363
Mirror glossASTM D523
Adhesion (cross-hatch)ASTM D3359 (method)

The following Table 1 provides characteristics such compounds as viscosity, pH, resistance against stains, and the spreading and distribution over the surface with the formation of a smooth film. Each of the compositions shows a decrease in viscosity with increasing shear rates. However amitie compositions have a significantly higher viscosity low shear than QR-708 (not containing boehmite). In addition, each of beetnik composition shows a higher percentage of drop viscosity at the transition from the measurement of low shear to high shear than QR-708. In fact, as shown by the profile rheology in figure 2, 100% of HIMSELF 9010 solution has a high shear viscosity which is less than the viscosity of the low shift to the value less than 30%, which represents a significant expansion of viscosities.

Data on the verification of the resistance against stains, shown in figure 3. Each of beetnik composition is resistant against stains over 7 mil. Samples of the t TEW-463-2 to TEW-463-5 have resistance against stains from 8 to 12 mils. Amitie compositions also have the desirable characteristics of the spreading and distribution over the surface with the formation of a smooth film corresponding to the spreading and distribution over the surface with the formation of a smooth film of about 6 and, for some examples, from 6 to 10, or from 6 to 7.

The drying time before solidification to touch for beetnik compounds decreases with the increase of the percentage of ITSELF. The drying time before solidification to touch reduced from 30 minutes to 9 minutes, as shown in Table 2. Drying time surface for the composition ITSELF is also better (less)than for composition QR-708.

Despite what has been described the preferred embodiment of the invention, it should be considered as explanatory and not restrictive, and it is quite clear that it specialists in this field can be amended and supplemented, which is not beyond the scope of the claims.

ICI cone &plate*
Table 1
PropertiesTEW-463-2TEW-463-3TEW-463-4TEW-463-5TEW-464
- Viscosity, centipoise
10 rpm24002270255089201460
20 rpm15601470162557001300
50 rpm89684894032401132
100 rpm6185806412180982
Unit creba7268687276
0.700.801.001.600.60
- pH8.575.458.368.438.90
- A* (mil)81012125
- *667104

In the table below:

ICI cone &plate - units of viscosity on the ICI method using cone and plate

And - resistant against stains

In - flow and distribution over the surface with the formation of a smooth film

Table 2
Properties TEW-463-2TEW-463-3TEW-463-4TEW-463-5TEW-464
- The drying time
And* (min)301512950
* (Min)6060356075

In the table below:

And the drying time before solidification to touch

At the time of drying of the surface

1. The solution for coating surfaces, which is a latex paint and contains rubbing the solution, the polymer emulsion and the solvent, while rubbing the solution formed when using active solution containing:
basis in the form of an aqueous solution and
particles of boehmite contained in it, which are anisotropic fasanolandia particles having a shape factor of at least 3:1, activated substances selected from the group comprising hydrox the d ammonium, salt of alkali or alkaline earth metal, nanoglide or colloidal silica, and the solution for coating is spreading and distribution over the surface with the formation of a smooth film of at least about 6, and resistance against stains more than 7 mil.

2. The solution for coating according to claim 1, wherein the polymer emulsion is an acrylic.

3. The solution for coating according to claim 1, characterized in that it is resistant against stains from 7 to 12 mils.

4. The solution for coating according to claim 1, characterized in that it contains from 0.1 to 20% of boehmite particles by weight of the solution.

5. The solution for coating according to claim 4, characterized in that it contains from 0.5 to 10% of the particles of boehmite from the weight of the solution.

6. The solution for coating according to claim 5, characterized in that it contains from 0.5 to 2% of boehmite particles by weight of the solution.

7. The solution for coating according to claim 1, characterized in that it has a drying time before hardening to a tack-free in less than 30 minutes

8. The solution for coating according to claim 1, wherein the boehmite particles have the greatest amount of at least about 50 nm.

9. The solution for surface coating of claim 8, wherein the boehmite particles have a largest dimension in the range of 100 d is 1000 nm.

10. The solution for coating according to claim 1, characterized in that the shape factor of particles of boehmite is not less than 6:1.

11. The solution for coating according to claim 1, wherein the boehmite particles have a secondary shape factor, which does not exceed 3:1.

12. The solution for coating according to claim 1, wherein the boehmite particles have a surface area, comprising at least 10 m2/year

13. The solution for coating on item 12, wherein the boehmite particles have a surface area constituting at least 75 m2/year

14. The solution for coating on item 13, wherein the boehmite particles have a surface area comprising from 100 to 350 m2/year

15. The solution for coating according to claim 1, characterized in that recovers 80% viscosity low shear for a time less than 15 C.

16. The solution for coating according to claim 1, characterized in that its pH is greater than 7,0.

17. The solution for coating of surfaces, which includes rubbing the solution, the polymer emulsion and the solvent, while rubbing the solution formed when using active solution containing a base in aqueous solution, and contained activated particles of boehmite, which represent the anisotropic fashionin the e particles, having a shape factor, of at least about 3:1, and the greatest amount of at least 50 nm, activated substances selected from the group comprising ammonium hydroxide, a salt of alkali or alkaline earth metal, nanoglide or colloidal silica, and the solution for coating is spreading and distribution over the surface with the formation of a smooth film over 6, and resistance against stains, component of at least 7 mils.

18. The solution for coating on 17, wherein the boehmite particles range from 0.5 to 2% by weight of the solution.

19. The solution to cover the surface 17, characterized in that it has a drying time before hardening to a tack-free in less than 30 minutes

20. The solution for coating on 17, wherein the boehmite particles have a maximum size of 100 to 1000 nm.

21. The solution for coating on 17, wherein the boehmite particles have a shape factor, of at least 6:1.

22. The solution for coating on 17, wherein the boehmite particles have a secondary aspect ratio not exceeding 3:1.

23. The solution for coating on 17, wherein the boehmite particles have a surface area, comprising at least 10 m2/is.

24. The solution for coating on item 23, wherein the boehmite particles have a surface area constituting at least 75 m2/year

25. The solution for coating surfaces in paragraph 24, wherein the boehmite particles have a surface area, comprising approximately from 100 to 350 m2/year

26. The solution to cover the surface 17, characterized in that recovers 80% viscosity low shear for a time less than 15 C.

27. A method of obtaining a solution for the coating of surfaces, which includes the following operations:
activating particles of boehmite substances selected from the group comprising ammonium hydroxide, a salt of alkali or alkaline earth metal, nanoglide or colloidal silica, to form the active water based mud;
education rubbing solution using active solution; and
education solution for coating surfaces using rubbing solution, polymer emulsion and solvent,
moreover, particles of boehmite are anisotrope fasanolandia particles having a shape factor of at least 3:1.

28. The method according to item 27, wherein the activating particles of boehmite results in the active solution having a rheology reduce the offset.

29. The method according to item 27, the different is decomposing the, the activated particles of boehmite provides for the addition of the base.

30. The method according to clause 29, wherein the base is an ammonium hydroxide.

31. The method according to item 27, wherein the activating particles of boehmite involves increasing the pH of the active solution to the value component of the at least 7,0.

32. The method according to item 27, wherein the activating particles of boehmite provides for the addition of colloidal silica particles having a charge opposite to the charge of the particles of boehmite.

33. The method according to item 27, wherein the formation of rubbing solution involves the addition of a pigment.

34. The method according to item 27, wherein the activating particles of boehmite involves adding salt.

35. The method according to item 27, wherein the solution for coating is spreading and distribution over the surface with the formation of smooth films in excess of 6.

36. The method according to item 27, wherein the solution for coating is resistant against stains, component of at least 7 mils.

37. The method according to item 27, wherein the boehmite particles range from 0.5 to 2% by weight of the solution for coating surfaces.

38. The method according to item 27, wherein the solution for coating is drying time before solidification to ex the PA for less than 30 minutes

39. The method according to item 27, wherein the boehmite particles have the greatest amount of at least about 50 nm.

40. The method according to item 27, wherein the boehmite particles have a surface area, comprising at least 10 m2/year

41. The method according to item 27, wherein the solution for coating surfaces restores 80% viscosity low shear for a time less than 15 C.

42. The solution for coating obtained by the method according to item 27.



 

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34 cl, 7 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: given resin-containing dispersions contain a polymer dispersing agent which contains at least a partially neutralised high-molecular cationic acrylic polymer and a cationic acrylic polymer different from the polymer dispersing agent. The said dispersions can be used in electrodeposited compositions and for depositing, at least partially, onto an electrically conducting substrate. The method of depositing a coating from such compositions onto an electrically conducting substrate involves electrophoretic precipitation of the composition of electrodeposited coating and heating the substrate, while depositing the coating, to a temperature and in a period of time sufficient for solidification of the electrodeposited coating on the substrate. The method of preparing an electrodeposited aqueous resin-containing dispersion for coating involves dispersing a composition of polymerisable monomers with ethylene-type unsaturation and a free-radical initiator in an aqueous medium in the presence of at least a partially neutralised high-molecular cationic acrylic polymer dispersing agent and emulsion polymerisation of the composition of monomers.

EFFECT: invention enables to obtain aqueous dispersions of acrylic polymers suitable for use in electrodeposited compositions; the dispersion is stable even without adding a surfactant.

20 cl, 28 tbl, 27 ex

FIELD: printing industry.

SUBSTANCE: composition contain the following components a) from 1 to 30 wt % per total mass of organic dye pigment composition, b) from 1 to 20 wt % of one or several binding substances, c) from 0 to 20 wt % of starch, d) from 0 to 10 wt % of anion direct dye, e) from 0 to 10 wt % of one or several auxiliary substances and f) water of up to 100%. Method for application of this composition and its use are also described.

EFFECT: improved resistance of organic pigments penetration and increased saturation of painting on paper.

8 cl, 4 tbl, 76 ex

FIELD: chemistry.

SUBSTANCE: invention relates to heat-insulating coatings. The anticorrosion and heat-insulating coating is made from a water-suspension composition with viscosity ranging from 1 to 100 Pas. The water-suspension composition contains a mixture of 5 to 95 vol. % polymer binder with 5 to 95 vol % hollow microspheres. The polymer binder is a water-emulsion polymer latex composition, which contains from 10 to 90 vol. % (co)polymer, selected from a group which includes acrylate homopolymer, styrene-acrylate copolymer, butadiene-styrene copolymer, polystyrene, butadiene polymer, polychlorovinyl polymer, polyurethane polymer, vinylacetate polymer or copolymer, or their mixture and from 10 to 90 vol % mixture of water and surface active substance. The hollow microspheres are in form of microspheres with different sizes from 10 to 500 micrometres and different packed density from 50 to 650 kg/m3, selected form a group which includes hollow glass microspheres, hollow ceramic microspheres, hollow polymer microspheres, hollow technogenic microspheres or their mixture. The water-suspension composition also contains a mixture of polyatomic alcohol with polybasic carboxylic or amino acid in equimolecular ratio.

EFFECT: longer service life of composition in harsh climatic and industrial conditions.

2 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: aqueous medium contains A) one or more water-diluted polyester polyols with hydroxyl number ranging from 20 to 300 mg KOH/g and acid number from 20 to 80 mg KOH/g B) one or more cross linking agents which are active towards OH groups, C) water, D) neutralising agent, and can also contain solvents, auxiliary agents and additives.

EFFECT: good adhesion to metals and high resistance to aggressive media.

13 cl, 4 ex, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to polymer dispersion for marking dispersion adhesives. The polymer dispersion for use in adhesives or coating agents contains water, at least one water-dispersible polymer and at least two different water-soluble salts, chosen from a group of water-soluble salts of Li, Sr or Sn, where at least two of the said water-soluble salts contain a different ion, chosen from a group consisting of Li, Sr or Sn ions, and the total number of ions, chosen from the above mentioned group, is at least 10 parts/million parts. The water-dispersible polymer used in the dispersion is polyvinyl acetate or a copolymer obtained using vinyl acetate. Also described is use of a mixture, containing at least two different water-soluble salts, chosen from a group of water-soluble salts of Li, Sr or Sn, where at least two of the said water-soluble salts contains a different ion, chosen from a group which consists of Li, Sr or Sn ions, for marking dispersion adhesives.

EFFECT: proposed polymer dispersion enables identification of an adhesive even after considerable decomposition of the adhesive matrix.

6 cl, 2 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: water-dispersion composition for coating includes acrylic film-forming material - 47-49%, water-acrylic dispersion stabilised with anion system of emulsifier "Finndisp", thinner - silicone dioxide "Aerosil A-300", organic derivative of smectite clays "Benton LT" and acrylic latex "Polyphob TR-117" with dry solids content 40%, pigments, calcite filler, antifoamer - mineral oil - mixture of the unsaturated fatty acids esters with hydrophobic "Foamex K-3" or dispersion of the hydrophobic wax and ester in mineral oil "Serdas 7005", coalescent - esteroalcohol 2,2,4-trimethyl-1,3-pentadiol monoisobutirate "Texanol" and butyldiglicole, dispersant - "Orotan 731K", conservant - solution of isothiazoline derivatives: 1,2-hydroxy-5,8,11-trioxadodecane, 1,3-bis (hydroxydimethyl)-carbamide, 1,6-hydroxy-2,5-dioxahexane "Parmetol A-26", pH regulator - 25% water ammonia solution, antifreeze - ethyleneglycol, surfactant -polyoxymethylene ether of alkylphenol and 75% water solution of anion wetting surfactant agent "Nuosperse 2006", hydrophobic additive - 29-31% wax emulsion "Aquacer -535" and solvent - water at the determined components ratio. The claimed water-dispersion composition for coatings has the film rinsability index 0.7-1.4 g/m2.

EFFECT: enhancing of composition performance.

2 tbl, 11 ex

FIELD: chemistry.

SUBSTANCE: invention relates to covering compositions. In particular, to epoxy composition. Described is water soluble epoxy composition. It contains product of interaction of cycloaliphatic or aliphatic resin with aromatic epoxy resin, water, and as hardener - adduct of amines mixture, taken in 520 multiple excess of stoichiometric quantity, with mixture of cycloaliphatic or aliphatic resin with aromatic epoxy resin, as well as filler, pigment, technological additives, which prevent composition effervescent, which improve its boating and wettability of pigments and fillers. Epoxy composition by given invention has increased stability during storing.

EFFECT: obtaining composition, which does not contain toxic substances and ensures increased durability indices in hardened state.

1 cl, 4 tbl, 11 ex

FIELD: chemistry.

SUBSTANCE: present invention relates to a coating compositions. The coating composition contains a thermally crosslinking film-forming resin binder or resin binders, a polymer or copolymer levelling agent having molecular weight between 1000 and 100000 g/mol (Da). The polymer or copolymer levelling agent is obtained through polymerisation in the presence of an alkoxyamine initiator/regulating compound or monomer. The monomer is selected from a group of acrylate or methacrylate compounds. The said copolymer levelling agent is obtained from a composition which contains an ethylene-unsaturated monomer. The polymer levelling agent used is poly-tert-butyl acrylate or poly-tert-butyl methacrylate. The coating is obtained by depositing the composition onto a substrate and applying heat energy or electromagnetic radiation.

EFFECT: use of the said polymer or copolymer as a levelling agent in coating compositions enables to obtain smooth coating for surfaces.

3 cl, 21 ex, 10 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to paint materials, particularly to a paint composition used for protective-decorative coating metal surfaces. The protective-decorative paint contains 21-45 wt % alkyd resin based film forming agent, 35-55 wt % specularite with high content of Fe2O3 and particle size less than 30 mcm as pigment, 0.5-1.5 wt % drying accelerator, 1-2 wt % rheological additive, 4-12 wt % filler and organic solvent - the rest. The protective-decorative paint preferably contains film-forming agent in form of modified alkyd film-forming agent, and the rheological additive in form of a surfactant based on TROYSOL fatty amine. The protective-decorative paint also contains a colouring pigment in amount of 0.5-4.5 wt %.

EFFECT: disclosed paint enables to obtain a coating with good protective properties: abrasive wear resistance, corrosion resistance and good decorative effect owing to obtaining a coarse finish with metallic lustre.

5 cl, 2 tbl, 7 ex

FIELD: chemistry.

SUBSTANCE: invention relates to preparation of coating compositions and can be used in interior finishing and facing paint coatings for wooden and metallic substrates. The coating composition, which is diluted with a solvent, contains alkyd resin having at least 20 wt % vinyl composite blocks and is characterised by fat content less than 65%. Mass ratio of non-vinyl to vinyl groups lies between 1:1 and 4:1. Vinyl groups contains styrene and/or (meth)acrylate groups. The ratio of styrene to (meth)acrylate groups ranges from 0.5:1 to 4:1. Vinyl groups have low polarity. Mw is less than 10000. Fat content is greater than 45%. The alkyd resin in accordance with this invention provides a coating consisting of a composition resulting from a solvent containing less than 300 g/l volatile organic substances.

EFFECT: composition has good rheological properties, required viscosity with low solvent content and short drying period, good strength and longevity.

7 cl, 3 tbl, 8 ex

FIELD: chemistry.

SUBSTANCE: invention relates to protection and restoration of corroded metal surfaces working under abrasive wearing conditions, used in atmospheric conditions of different climatic zones, in the atmosphere of aggressive media, for example in power engineering, chemical and mining industry when repairing rusty equipment. The anticorrosion coating composition contains the following components in wt %: 21-35% modified alkyd filming agent, 1-2% rheological additive - surfactant based on TROYSOL fatty amine, 0.5-1% siccative, 4-12% filler, 5-10% zinc phosphate, 1-3% rust solvent based on tannins and tannin derivatives, specularite with high content of Fe2O3 and consisting of different fractions, 20-30% specularite of the first fraction with particle size not less than 63 mcm, 6-15% specularite of the second fraction with particle size not greater than 20 mcm, organic solvent - the rest.

EFFECT: proposed composition has good anticorrosion properties, abrasive wear resistance, high durability, is capable of dissolving rust without thorough preparation of the metal surface.

2 cl, 2 tbl, 7 ex

FIELD: chemistry.

SUBSTANCE: group of invention relates to production of paint and varnish compositions such as enamel, and specifically to production of alkyd-urethane enamel with different colour spectrum, which can be used for protective-decorative coating various types of surfaces. The paint and varnish alkyd-urethane enamel composition contains a combination of at least one alkyd varnish and at least one alkyd-urethane varnish, a pigment component, which is necessary for forming the colour of the enamel, at least one organic solvent, a dispersing agent, a drier and other auxiliary target additives, including at least one rheological additive, anti-film additive, anti-crater additive. The method of producing alkyd-urethane enamel with different colours involves the following stages: possible preparation of separate liquid and granular components, and their batching in accordance with the formulation and consumption rates for the produced amount of enamel, preparation of intermediate products, two-step dispersion, setting "type", step-by-step control. Manufacturing complex for producing alkyd-urethane enamel in form of suspension, containing colouring pigments in a mixture of organic varnish, solvent, lapping compound and target additives, consists of posts which form a hydraulic system fitted with process pipe-lines, where posts are linked with each other according to operations producing the said suspensions and include a post for storing initial dry and liquid components, a post for batching and weighing said components, a post for mixing the components, a dispersing post, a post for setting "type" of the enamel and a post for packing final enamel product.

EFFECT: obtaining alkyd-urethane enamel with good physical and chemical characteristics, which does not flake during storage and does not form surface film and residue.

25 cl, 5 tbl, 1 dwg, 1 ex

FIELD: chemistry.

SUBSTANCE: preheated oil from a reservoir 9 is loaded into reactor 5 with an agitator 2 and reactor heating thereafter enabled. Dissolved white resin is loaded. After 250C is achieved, nitrogen feed is disabled, while the reactor 5 is connected to a vacuum network. Pentaerithrit and lead siccative are loaded into the reactor 5. Then a reactor degassing system is disabled with enabled inert gas feeding and continued heating of reaction mixture. After re-etherification process is complete, heating of the reactor 5 is disabled, while the reaction mixture is cooled. Phthalic anhydride and maleic anhydride are loaded into the reactor 5. For simplifying water extraction from the reaction zone, xylene from the reservoir 10 is introduced into the reactor 5 by an industrial pipe-line with a pump 46. Water vapour as an azeotrope mixture, together with xylene vapour are directed to a packed column 26 and a refrigerator 27. Resin from the reactor 5 is discharged to a mixer 11. Solvent vapour generated in resin dissolving is delivered to a heat exchanger 33, wherein condensed and flow down back to the mixer 11.

EFFECT: stable characteristics of technological process and improved fire and environmental safety.

20 cl, 2 dwg

FIELD: chemistry.

SUBSTANCE: group of inventions refers to making paint compositions, such as enamels, namely, to making various-palette alkyd-urethane enamels to be used for protective decorative coating of various surfaces. Paint alkyd-urethane enamel compositions contain a combination of, at least, one alkyd varnish, and, at least, one alkyd-urethane varnish, dye-forming pigment additive component necessary to form enamel colour, at least, one organic solvent, dispersant, siccative and other auxiliary base additives, including, at least, one rheological additive, antiskinning additive, antidimpling additive. Herewith alkyd-urethane varnish content in the composition is at least 10% of total weight of the specified varnishes and/or at least 8% of paint composition weight.

EFFECT: high stress-strain properties and processing behaviour of produced enamels.

13 cl, 2 tbl, 6 ex

FIELD: chemistry.

SUBSTANCE: invention concerns paint-and-varnish industry, particularly alkyd varnish production using automated control system of technological process, as well as feeding of bulk components to reactor with explosive medium. Method of alkyd varnish production involves alcoholytic re-etherification of vegetable oil by pentaerythritol with heating in inert gas flow in the presence of catalyst, followed by polyetherification of re-etherification products by phthalic anhydride with heating, water distillation with azeotropic solvent, reaction product - alkyd resin - cooling to 160-180°C, varnish preparation by mixing obtained resin with organic solvent. Re-etherification and polyetherification process is performed in reactor featuring electric induction heating system and connected to technological pipelines with stop valves. Reactor has at least one pipe socket with heat-resistant gate installed in it, and at least two water heat exchangers in the form of worm pipes, mixer, nozzle column, vertical cooler, condenser and separation vessel. Alkyd resin dissolution is performed in mixer with stop valves, mixer, jacket and reverse heat exchanger for condensation and recycling of evaporating solvents in the mixer; vegetable oil dosing and loading to reactor is performed by automated control system, where stop valves of oil feed line are opened and closed by remote controls automatically or steered from control console; dosing and loading of bulk component, such as pentaerythritol and phthalic anhydride is performed and controlled over automated control system for bulk component dosage and loading, including depacker, tanker on tension weighing device, pneumatic lift, at least one ripper, snail feeder and mentioned heat-resistant gate in pipe socket of reactor; dosing and loading of azeotropic solvent and water to worm pipes of reactor, as well as recycled water feed and control and solvent feed to mixer are performed with remote automatic control of stop valves. In addition invention claims method of bulk component feed to reactor used in production of alkyd varnish.

EFFECT: reduced labour cost, improved fire protection and environmental safety.

22 cl, 1 tbl, 2 dwg, 2 ex

FIELD: chemistry.

SUBSTANCE: invention relates to paint-and-varnish industry, in particular to method for production of alkyd-urethane enamels of various colours, and may be used to produce protective-decorating enamel coatings applied onto various substrates. Method for production of alkyd-urethane enamel is described. This method implies preparation of individual precursor components, their dosing, preparation of intermediate enamel product by combining alkyd pentaphthalic lacquer with dispersing medium, organic solvent and rheological agent, the mixture being stirred at 300-500 rpm, followed by introduction of free-flowing pigments into the mixture, together with filler, when required. Pigments and filler are pre-dispersed under stirring at a speed up to 1000 rpm until homogenous suspension is obtained. Then intermediate product is further dispersed until required degree of grinding is obtained, alkyd-urethane lacquer is added under stirring and, when required, anti-crater additive and paint dryer are added. Then, pigment tinting paste is added, the mixture is stirred to obtain homogenous suspension, and antiskinning agent is added.

EFFECT: production of alkyd-urethane enamels of various colours, with high physical and chemical properties.

10 cl, 5 tbl

Pigmental paste // 2328512

FIELD: chemistry.

SUBSTANCE: invention relates to the pigmental paste for paint toning. The pigmental paste for toning the covering composition is described, where the pigmental paste includes: at least one ramified alkide with the viscosity less than 5 Pa·s at 23°C and shift rate 100 c-1 and the number-average molecular weight Mn>1500, which contains the groups for the oxidising drying produced from the fatty acids; one or several solvents without aromatic substances - 28 mass percent; and one or several pigments. At that, the rate of alkide ramification is at least 0/35 and preferably less than 0.42, alkide fatness is at least 76 and preferably less than 84, the alkide acidity index is within 6 to 9 mg KOH/g; the solvent without the aromatic substances contains the aliphatic hydrocarbon solvents, ketones and/or complex ethers with molecular weight Mn>1500. The method for paint toning is described where the principal paint is selected from the set of principal paints and then mixed with the said pigmental paint, at that, the principal paint corresponds to the composition based on solvent and containing alkide.

EFFECT: invented pigmental paint is useful in toning paint with high concentration of solid substances.

11 cl, 8 dwg

FIELD: chemistry.

SUBSTANCE: invention concerns polymer composition which can be applied in production of sliding bearings, gasket, cogwheels and other construction parts of machines and aggregates. Composition includes components at the following ratio, wt %: 80-90 of aromatic phenylon polyamide C-2, and 10-20 of coated carbon fiber. Ural-T-24-Cu hydrate cellulose fiber coated electrochemically with copper in amount of 50 wt % of fiber weight is used as carbon fiber with coating.

EFFECT: enhancement of composition resilience by 36-70% and durability by 1,8-2,25 times.

1 tbl, 6 ex

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