Improved coating composition

FIELD: chemistry.

SUBSTANCE: pigmented aqueous coating composition, having gloss of at least 75% after setting, contains i) a non-cross linking aqueous dispersion of an addition oligomer with average molecular weight of 5000-15000 Da and Fox Tc higher than 0°C and lower than 50°C, ii) an aqueous dispersion of an addition polymer with average molecular weight greater than 53000 Da and Fox Tc higher than 10°C and lower than 40°C and average particle diametre smaller than 150 nm, and a pigment. The ratio i):ii) is between 0.25:1 and 2.7:1 in terms of wt % of solid substances. The invention also describes a method of applying a coating onto a base using the pigmented aqueous composition; a method of producing a non-cross linking addition oligomers with average molecular weight of 5000-15000 Da and Fox Tc higher than 0°C and lower than 50°C, use of a combination of a polymer with average molecular weight greater than 53000 Da, Fox Tc higher than 10°C and lower 40°C and average particle diametre smaller than 150 nm and a non-cross linking addition oligomer for obtaining an improved pigmented aqueous coating composition. The coating obtained using the pigmented aqueous composition has setting time of 6-12 minutes and gloss after setting of at least 75%.

EFFECT: improved composition properties.

13 cl, 4 tbl, 23 ex

 

The present invention relates to aqueous compositions for coatings that have a low content of volatile organic solvent (VOC). The invention relates in particular to a pigmented aqueous architectural compositions for coatings, which are high and which retain their gloss after drying. Used in this context, the term "architectural coating" means a coating for painting interior and exterior surfaces of buildings, such as buildings, fences and bridges. For simplicity, these coatings, in General, will be called colors. The invention also relates to certain water-soluble oligomers and polymer dispersions.

Compositions for coatings usually contain a liquid carrier and a film-forming binder polymer together with other components such as additives, including thickeners and colored paints, of course, the pigments. The carrier fluid may include water, an organic solvent or a mixture of water and an organic solvent. The binder polymer may be in the form of a dispersion of particles in the carrier fluid, and therefore the polymer exists in the form of microparticles, or can be dissolved in the carrier fluid may be a solution.

High-gloss coatings are paints that after drying to a hard layer having the t gloss, at least 75% (gloss at 20, unless specified otherwise). Such dyes are known, and typically they are based on polymers dissolved in an organic solvent, also referred to as soluble polymers. A typical high-gloss paint based on alkyd polymers dissolved in organic liquids, usually white-spirit. Of course, these paints have a high LOS and emit large amounts of organic solvent into the atmosphere in the coloring process and subsequent drying liquid paint that creates unwanted odors and harmful to the environment. This is a special issue of architectural paints used for painting inside buildings, especially in confined areas and unventilated rooms. Moreover, paints based on alkyd resins contain metal driers to speed up auto-oxidation. The most widely used metal desiccant connection cobalt, currently refers to substances that pollute the environment.

Paints, especially those that are suitable for use on architectural surfaces, such as buildings, largely well received, because they form a smooth surface after drying to a hard layer. Such a surface is relatively easy to achieve in the case of varieties of the low-gloss, such as silk (gloss about 30-45% at 60°), as Matt eggshell (gloss about 15-25% at 60°) and matte paint (gloss<10% at 85°), because the dry surface, such a low gloss paint reflects only a small amount of light. Accordingly, the eye harder to detect defects. In the case of high-gloss paint, the surfaces of which are more reflective, defects, such as roughness and/or surface roughness, it is much easier to see. Thus, high-gloss paint to get harder than paint discoglossidae, which seem to be defect-free, in particular supple and smooth.

For dried paint can be seen various surface defects, mainly occurring at a time when the paint is still wet, or at least at the early stage of drying. Such defects typically include pockmarks and craters, which are usually formed by small areas of contamination such as dust or oil on a painted base, or moisture inside the paint, causing or Nesmachnyi fundamentals of liquid paint or runoff from contamination on the substrate. Such defects are usually eliminated by improving the training framework and the overall cleanliness of the substrate. Such defects, however, are not considered by this invention.

Uneven painted on top of the awns are also obtained when using the brush when painting. This occurs when the first portion of the high-gloss paint applied to the canvas with a brush, especially on a large surface such as a door. In this situation, the first portion of the paint is already partially dry by the time when the painter will return to painting the adjacent unpainted surface. The more surface that paint, the longer the delay and therefore the greater the degree of drying of the first portion. Inevitably, the painter will need to apply fresh paint over the partially dried first portion, especially on its perimeter, in the so-called overlapping areas. Partially dried paint in this area be more viscous than fresh paint. In this case, the painter is faced with the problem of connection or "mixing" of fresh paint with partially dried, more viscous paint to make the surface look smooth, especially in the overlapping area.

Because the painter applies the fresh paint on top of the partially dried using a paint brush, the bristles of the brush violates partially dried bottom paint, which, being a high viscosity, will not leak out beyond the desired smooth surface. Although fresh paint, because it has a low viscosity will flow, it only displays the broken uneven surface beneath it. On the contrary, the viscosity of the fresh is th paint, applied on top of the overlapping areas, can grow very quickly due to diffusion of liquid media from it inside the bottom of the paint, thus making it impossible to achieve a smooth end surface. In any case, this paint has a maximum time, which may allow the painter before returning to painting on top of the overlapping region to achieve acceptable final smooth surface, and this time is known as the setting time or the time until the next painting.

Naturally, the longer the setting time is preferable, because then the painter has more time before he must return to the combine or "mix" of fresh paint with previously applied paint. For known high-gloss paints based soluble polymers setting time tends to be about 20 minutes. However, the disadvantage of such colors is to allocate significant amounts of organic solvents, which are not only unpleasant smell, but also are harmful to health, especially when they are used in a long time. The drying time to touch such inks, measured by the method of dry sand" lasts about 4 hours. Test dry sand is a time after which the paint does not feel sticky when PR is convenie. Preferably, a short drying time to touch.

Besides such well-known high-gloss paints based on alkyd polymers depend on the stitching by autoxidation to complete the curing process and formation of the final solid coating. It is a slow process involving the diffusion of oxygen from the air into the liquid of the paint film. Accordingly, the paint, once applied to the surface, cannot be re-applied for approximately 16 hours. This is because the solvent in the second paint coating partially dissolves the first floor, causing swelling and bubbling. Moreover, these paints based on alkyd resins also a yellow, especially in poorly lit areas. This is particularly problematic with white and pastel colors.

Known also paints with low VOC's, based on the dispersions of alkyd polymers in an aqueous liquid carrier. They have the same drawbacks as alkyd paint solvents.

Also known water-soluble paints with low VOC-based dispersions of high molecular weight polymers. However, even the most glossy of them have low gloss from about 60 to 65% (measured at 20°) and they have an unacceptably short setting time is only 3-4 minutes. Short setting time arises from the fact that the polymers so is x paints are microparticles. Accordingly, as soon as the paint dries on the surface, and water starts to evaporate, the volume fraction of the polymer increases with an associate, but not a significant increase in viscosity. As evaporation continues, the volume fraction continues to increase, reaching a point at which the dispersed particles touch each other. When this happens, the viscosity-drying paint is much more in comparison with small increases in the dry residue, to the point when it becomes impossible mixture of fresh paint from previously painted.

In high-gloss paints based on polymer dissolved in the carrier fluid, the viscosity increase when drying is much slower than in the absence of polymer particles. The reason for this is that the setting time in paints based on polymer solutions is usually much longer.

Known water-soluble high-gloss paints for architectural applications. Patent US 5422394 describes one of these colors on the basis of samoochischayuschiesya soluble acrylic polymer, and samoochischennya ability is provided by allyl groups. They have a good time before applying the next layer is about 15 minutes and high gloss 80-85%. However, the resistance of these paints is unacceptably low, the OS is especially in the first few days of use. This is because it takes time for smokeline for education sufficient crosslinking to increase the molecular weight of the acrylic polymer to become insoluble in the polymer, which will not be exposed to water. Moreover, the allyl group is not very stable relative to the speed of the stitching.

Recent international application WO 03/082999 considers the composition of water-soluble paints containing mixture massivemocha low molecular weight oligomer and high molecular weight of the dispersed polymer. The aim of the invention are compositions for coatings with improved setting time, which exceeds the average of 20 minutes. Disclosed oligomers of various types, including vinyl, polyester, polyurethane and hyperbranched oligomers. Also disclosed dispersions of high molecular weight polymers.

In this description reveals the drawbacks of the compositions for coatings based on polymer dispersions and seamless vinyl oligomers WO 03/082999. The main drawback is that the gloss of such compositions after pigmentation, for example, the dye of example 4, as described in WO 03/082999 is less than 75%, which is unacceptable for those consumers who prefer was highly reflective surface high-gloss paint. Assume that this happens because C is the incompatibility of the polymer and oligomer, used in the example. Moreover, although the paint of example 4 provides the setting time more than 20 minutes, the paint film remains sticky for a long period of time and is soft, even when fully dried.

So, although using data WO 03/082999 you can reach the setting time is 20 minutes or more, low gloss and softness and stickiness of the final film, which are formed as a result are very serious shortcomings. This is particularly important in the field of architectural paints, when paints are applied and must show their final properties at room temperature. Indeed, the deficiencies are so significant that the paint is unacceptable for use as a decorative and/or protective coatings. These problems are not indicated WO 03/082999. Nevertheless, there remains an unmet need for water-soluble paints with high gloss and low VOC's, which dry quickly and have appropriate hardness, especially in the field of architectural paints.

Moreover, unexpectedly, the authors found that there is no need to compare the time before overcoating existing high-gloss paints solvent-based coatings, such as paints based on alkyd resins. Indeed, for high-gloss water-based paints with low VOCS present invention reasonable time COI is rhenium from 6±1 12±3 minutes and no more than 15 minutes, measured by the method described hereinafter. They have advantages over, for at least 20 minutes for compositions of water-soluble paints with low VOC's, described in WO 03/082999 as the best option to achieve the final properties of the dried paint. In particular, the time before applying the next layer of 6±1 12±3 minutes allows you to achieve a smooth and hard surface, at the same time keeping the drying time to touch, as measured by test drying sand described below, of less than about 200 minutes.

Description WO 03/082999 shows only one embodiment, known in this paper as the paint of example 4 - paint vinyl-based oligomer, and are not informed on how to choose the oligomer and dispersible polymer in order to achieve a high gloss, short times to touch and solid dry coating.

The authors of this invention have improved water-soluble paint, which overcomes the major shortcomings and which has excellent properties as a whole.

Accordingly, it is proposed pigmented aqueous composition for coating, containing:

i) an aqueous dispersion massivemocha additionnal oligomer with mass-average molecular weight of from 5000 to 15000 daltons and calculated Fox TC greater than 0°and less than 50°C,

ii) an aqueous dispersion additionnal polymer with a mass-average molecular is th weight of more than 53000 Dalton, designed Fox TC greater than 10°C or less 40°C and an average particle diameter of less than 150 nanometers,

where the ratio (i):(ii) ranges from 0.25:1 to 2.70:1, based on wt.% solids dispersion.

Preferably, the composition for coating has a setting time of 6±1 12±3 minutes and never more than 15 minutes, and measured in a dry state, the gloss is not less than 75%. This allows you to achieve smooth, high-gloss painted surface without requiring high skill or speed painter. Preferably, the setting time is in the range of 6±1 12±3 minutes and more preferably from 6±1 to 10±3 minutes.

Beneficial for dry compositions for the coating to have additional properties - the drying time of sand is less than or equal to 200 minutes and a hardness of at least 30 seconds.

Preferably the hardness of the dried paint, measured by the method described later in the present description, is in the range from 30 to 200 seconds, even more preferably from 35 to 150 seconds, and most preferably from 40 to 150 seconds. The hardness value above 30 seconds means that the dried paint surface is firm enough to withstand the pressure without feeling soft, or not to be damaged.

Preferably, the drying time with a sand composition for coating is less than 200 minutes, the pre is reverent less than 170 minutes and most preferably is 50-170 minutes. Short drying time with sand is preferred as it is less likely to damage the paint, for example, an accidental contact with a person or object, or natural dust from the atmosphere, settling on the paint.

Suitable pigments include organic pigments such as phthalocyanines, azo pigments, chinagreen; and inorganic pigments such as carbon black, iron oxides and titanium dioxide. The average diameter of pigment particles can be up to 20 microns, preferably 10 microns. Particles with diameter greater than 20 microns can reduce the gloss of the dried paint.

Composition for coating may also contain ingredients selected from the group consisting of pigments, fillers, waxes, solvents, rheology modifiers, dispersing agents, substances that promote spreading, and biocides.

The setting time is preferably at least 7 minutes and less than 10 minutes, even more preferably from 8 minutes to 10 minutes. Paint with setting time for more than 10 minutes tend to be impractical for a long time to touch and therefore are unacceptable for users.

Preferably, the gloss is from 75 to 100%, preferably from 78% to 100%, and most preferably from 80% to 100%.

The term "aqueous" means that idcast-media at least 50 wt.% consists of water, and the rest is organic solvent. Preferably, the organic solvent is compatible with water and even more preferably, it is dissolved in water in the quantities used, as it contributes to improved stability, especially stability of viscosity during storage for a long period of time. Examples of suitable organic solvents include alcohols, glycols, esters of alcohols, ethers, alcohols and esters of ethers of alcohols, for example, n-butanol, propylene glycol, benzyl alcohol, 1,3 biomonitored-2,2,4-trimethylpentane, onomatology, monotropy, monopropylene and monobutyl esters of propylene glycol, diethylene glycol, dipropyleneglycol, methyl ester dipropyleneglycol, ethyl ether of diethylene glycol and 1-methoxy-2-hydroxypropan.

Preferred solvents include methylpiperazin and Texanol an ester alcohol, because they both contribute to the coalescence of polymeric and oligomeric particles, especially polymer particles.

For the user and the environment it is advantageous to minimize the amount of organic solvent and, therefore, VOC in the paint. Preferably, the content of organic solvent in the liquid carrier ranges from 0 to 49.9%, before occitaine from 0 to 25%, still preferably from 0 to 15%, and most preferably from 0 to 10%.

Aqueous dispersion implies that the polymer or oligomer exist in the form of particles in the aqueous phase.

The ratio of oligomer to the polymer, calculated in wt.% solids dispersion is from 0.25:1 to 2.70:1, preferably from 0.30:1 to 2.70:1, more preferably from 0.43:1 to 2.33:1, and most preferably from 0.8:1 to 1.30:1. Below a ratio of 0.25:1 setting time becomes unacceptably short, while higher ratios 2,70:1 rapidly decreases gloss.

The terms "additional polymer" and "additional oligomer" means that the polymer or oligomer derived from the amenable radical polymerization Ethylenediamine monomers. Examples of such suitable Ethylenediamine monomers include esters of (meth)acrylic acid, amides and NITRILES, vinyl monomers and vinyl esters.

Agents transfer circuit, such as mercaptans, can be used to regulate the molecular weight of the polymer and oligomer. Suitable mercaptans include n-artilleryman, n-dodecylmercaptan, n-hexadecylamine and tert-dodecylmercaptan.

Application name (meth)acrylate is used to represent both the acrylate and methacrylate, and examples of suitable esters of acrylic acid and esters of methacrylic acid are Alki the esters, preferably, methyl(meth)acrylate, propyl(meth)acrylate, butyl(meth)acrylate, 2-ethylhexyl(meth)acrylate and alkoxyl(oksietilenom)(meth)acrylate. Small amounts of acidic monomers, such as methacrylic acid, acrylic acid, succinic anhydride and maleic anhydride can also be used separately or in combination. Hydroxyquinoline monomers such as hydroxyethyl(meth)acrylate and hydroxyisopropyl(meth)acrylate, may also be included, although caution must be exercised in the case of obtaining the oligomer containing such monomers, as the case may be contaminated reactor, and the result can be instability.

Examples of acceptable vinyl monomers include styrene and alpha methylsterol, finalproject, vinylboronate, vinyl acetate and vinylistic. Preferably, additional polymer and oligomer derived from esters of acrylic acid, methacrylic acid and, optionally, styrene and/or its derivatives.

More preferably, the oligomer contains methacrylic acid and/or acrylic acid and, most preferably, the oligomer contains methacrylic acid as acrylic acid has a tendency to the formation of water-soluble oligomer, which reduces the water resistance of the dried paint. The preferred acid is and the interval from 4 to 8 wt.% all oligomeric monomers, equivalent to the acid number (CZK) from about 25 to 55 mg KOH/g nonvolatile oligomer. A more preferred value of HT is the interval from 30 to 45 mg KOH/g and most preferred is a value in the range from 35 to 45 mg KOH/g When CZK more than 55 water sensitivity of the paint becomes unacceptably low and below about 25 gloss paint is very low.

The acid is preferably neutralized at least partially neutralizing bases. Suitable bases include hydroxides of alkali metals such as sodium hydroxide or potassium hydroxide. It is preferable to use organic bases, such as dimethylaminoethanol, triethylamine and ammonia. Optionally, the neutralization can be carried out at elevated temperature, because it leads to improved viscosity stability and alignment of final dried paint, compared with when is cold neutralization.

Paints based oligomers containing methoxy(polyethylene glycol)n-methacrylate, [abbreviated MeO(PEG)nMA], where n represents the molecular weight of poliatilenglikole part and is usually from 350 to 2000 daltons, tend to have unacceptably low gloss. Preferably, the oligomer contains less than 5 wt.% MeOPEGMA and, most preferably, does not contain MeOPEGMA.

the glass transition temperature or TC additionnal polymer may vary copolymerizable monomers with the appropriate TC. Preferably, additional polymer has a calculated Fox TC between 20 and 40°C, preferably from 25 to 35°C. When TC To 10°C and below the paint has unacceptably long time to touch and also inadequate resistance, while the TC of about 40°C and above leads to unacceptably uneven final surface when completely dry the first coating is applied a second coat of paint.

Additional polymer preferably has a measured mass-average molecular weight of from about 53000 to 100,000 daltons, preferably from 53000 to 500,000 daltons, more preferably 53000 to 250,000 daltons, and most preferably from 53000 to of 220,000 daltons. Below 53000 Dalton, the resulting paint has unacceptably low resistance to clumping.

Polymer with a molecular weight of more than 1,000,000 difficult to make precise measurements, because it is often difficult to find a solvent capable of dissolving the polymers of such high molecular weight. Often insoluble, the high molecular fraction of the polymer is filtered before measurement that artificially leads to that measured only low molecular weight part.

The average particle diameter of the dispersion additionnal polymer preferably is in the range from 10 to 150 nm, preferably from 50 to 135, and most preferably from 80 to 15. Above 150 nanometers gloss drops below 75%.

Massively additional oligomer preferably has a mass-average molecular weight of 7500 to 12500 daltons, preferably from 8500 to 11500 daltons, and most preferably from 9000 to 11,000 daltons. Above about 15000 daltons, gloss paint drops below 75%. Below about 5000 daltons, the oligomer has a tendency to stickiness, regardless calculated Fox TC. Suppose that the molecular weight decreases the true molecular weight of the oligomer is significantly smaller than Fox TC. Moreover, in order to achieve such a low molecular weight, number of sour agent transfer circuit, remaining from stage polymerization is sufficient to impart an unpleasant odor paint. This is very undesirable for users, especially when the paint should be applied indoors or in any poorly ventilated space.

Designed Fox TC oligomer must be greater than 0°and less than 50°C., preferably from 10 to 40°C, preferably from 10 to 30°C., and most preferably from 15 to 25°C. When TC of 0°C the paint is unacceptably long time to touch and at 50°C and higher gloss is unacceptably low.

The variance additionnal polymer can be obtained by known methods of polymerization. Preferably, use a known method of emulsion the polymerization using a water-soluble polymerization initiator and usually ionic and/or nonionic surfactants. It is preferable to use methods with seed and feed materials. This requires, first, a small portion of the monomers, usually comprising about 5% of all monomers (usually known as the seed monomers), which are polymerized in a short period of time of about 15 minutes. This is followed by polymerization of the remaining monomer (raw material monomers), which may differ from the composition of the seed monomers. Raw monomers usually are polymerized over a longer time. Optionally, the monomers may be emulsified in water in the presence of a surfactant to obtain an emulsion of monomers dispersed in water before adding to the reactor.

Suitable examples of water-soluble polymerization initiators include ammonium persulfate, sodium persulfate, potassium persulfate, peroxides, including hydrogen peroxide and tert-butyl hydroperoxide. It is also possible to use redox system initiators. Suitable examples include hydrogen peroxide and ascorbic acid, tert-butyl hydroperoxide and sodium ascorbate, ammonium persulfate and sodium metabisulfite or formaldehydeinduced sodium. Optional can be added metal salts, such as copper or iron.

Polymerization begins by raising the temperature of the reaction is assy higher than the temperature of decomposition of the initiator. The preferred temperature is from 30 to 98°C. When using a redox initiator system, especially in the presence of a suitable metal, more favorable low temperature. In the case when the polymerization starts by thermal decomposition of the polymerization initiator, it is preferable interval higher temperatures.

The method and ingredients used to obtain additionnal polymer, it is also acceptable to obtain the oligomer. However, in the case of the oligomer preferably, the monomers for polymerization was formed in the emulsion prior to polymerization. It is usually performed in a polymerization reactor with separate sections. Requires intensive mixing, which may be provided with a mechanical apparatus for emulsification, such as Silverson (available from Silverson Machines Ltd, Chesham), or alternatively, can be used Sonolator (available from Sonic Corp, Connecticut, USA), which uses ultrasound to generate the necessary high shear. Optionally, a small amount of hydrophobic material, such as hexadecane or soybean oil, may be added to the monomers prior to emulsification. The presence of such material improves the stability of the monomer emulsion. This reduces contamination of the reactor during the polymerization of the oligomer.

p> The second aspect of the invention relates to a method for additionnal oligomer under paragraph 1, including the stage of receiving the monomer in water emulsion by

i) mixing the monomers, water and a surfactant and, optionally, a hydrophobic material to form a mixture;

ii) exposure to a mixture of (i) a high shear using funds for intensive mixing with the emulsion of the monomers in the form;

and forcing monomers for polymerization and the formation of a dispersion additionnal oligomer.

Preferably, the mixture (i) contains a hydrophobic material, because it gives a more stable dispersion of the oligomer.

The third aspect of the invention relates to the use of polymer and oligomer under paragraph 1, to obtain a composition for coating, which has a setting time of 6±1 12±3 minutes and never more than 15 minutes; and has a gloss after drying 75%. Preferably, the setting time is in the range of 6±1 12±3 minutes, and most preferably in the range from 6±1 to 10±3 minutes.

A fourth aspect of the present invention relates to a method of applying a base coating according to the invention and forced or natural drying of the specified coating with the formation of a solid layer with a gloss of at least 75%.

EXAMPLES

The invention will be illustrated in the following paragraph is kerami.

The following ingredients were used in the examples.

Rhodafac RK500 and RS710, available from Rhodia Geronazzo S.p.A, Milan, Italy.

Rocima V 189, available from Thor UK Ltd.

The hydroperoxide tert-butyl, available from ElfAtochem UK Ltd.

Formaldehyde sulfoxylate sodium, available from Bruggeman Chemicals.

AMPS 2405, available from Lubrizol UK Ltd

Soybean oil, available from Seators Ltd, UK

Emulson EPA 1954, available from Clariant, UK.

Orotan 681 and Acrysol RM 2020, available from Rohm and Haas (UK) Ltd

Fomex Tego foamex 1488, available from Tego Chemicals.

Empimin OT75, available from Huntsman Corporation Europe.

OBTAINING an AQUEOUS POLYMER DISPERSION

Example (polymer 1 floor. 1)

Equipped with 2-liter flat-bottomed flask with a stirrer, means for blowing nitrogen, water fridge and a suitable input for adding measured quantities of reagents. In the flask is charged with 550,9 g of demineralized water and then adding 27,91 g of the seed solution of surface-active substances (containing of 5.39 g of Rhodafac RS710, 21,57 g demineralized water and 0.95 g of ammonia solution). The temperature of the contents was raised to 80°C using a water bath. When the content is heated to 80°C in flask add 13,96 g seed monomer mixture (containing 4,47 g of styrene, of 4.38 g of methyl methacrylate, 4.61 in g of butyl acrylate and 0.50 g of methacrylic acid). The temperature is maintained at 80°C for 10 minutes, then add 19,62 g ZAT is avocado initiator solution (containing 0,82 g sodium persulfate, dissolved 18.8 g of demineralized water). After 10 minutes the temperature was raised to 85°C for 15 minutes. After the set temperature is reached, load 544,39 g raw monomer mixture (containing 174,2 g of styrene, 170,94 g of methyl methacrylate, 179,65 g of butyl acrylate and of 19.6 g of methacrylic acid) for 3 hours at a constant speed. At the same time add 41,86 g of the solution of surface-active substances (containing of 8.09 g of Rhodafac RS710, 32,35 g demineralized water and 1.42 g of ammonia) to Monomeric loading with constant speed. At the same time type of 78.47 g raw solution of the initiator (3.28 g sodium persulfate dissolved in 75,19 g demineralized water), but for 3.5 hours. After completion of this addition the temperature of the dispersion was lowered to 60°C, then add 4.68 g of the final load (containing 0,78 g of sodium tert-butyl hydroperoxide dissolved in 3,90 g demineralized water). After 5 minutes becomes 9.97 g of the remaining post-boot (containing 0,78 g formaldehydeinduced sodium dissolved in 8,19 g demineralized water) is added dropwise within 15 minutes. The temperature is held at 60°C for another 15 minutes before the end of the addition, then add 6,76 g of ammonia (35%). Then the dispersion is cooled to 30°C, and add biocide (Rocima 89 VI)to protect the contents from microbi the logical crops.

TC=30°C

The average particle diameter equal to 107 nanometers

The mass-average molecular weight (Mw) equal 156000 Dalton.

Examples 2-4 (POS. 2-4)

The effect of molecular weight.

These examples are carried out in accordance with the same method and the same ingredients as in example 1 with the difference that the monomer mixture used in this case, in wt.%, is described below. The transfer agent chain n-artilleryman used to modify the molecular weight.

ExampleArticleMMABAMAAPOMMw
No. 24019,834,35,80,1122000
No. 339,819,734,25,80,553000
No. 439,619,634,25,8 1,031000

St - styrene, MMA is methyl methacrylate, BA butyl acrylate, MAA is methacrylic acid, SIP - n-artilleryman.

The mass-average molecular weight measured according to the method described below.

Sample No. 2-4 all had TC=30°C and the average particle diameter of 100-120 nm.

Examples 5-7 (Pol-7)

The effect of TC

These examples are carried out in accordance with the same method and the same ingredients as in example 1 with the difference that use a different monomer mixture, in wt.%, described below.

ExampleArticleMMABAMAAThe
No. 535,015,7of 45.73,610°C
No. 635,022,039,43.620°C
No. 735,033,028,43,640 the

Samples No. 5-7 all have Mw 149000-195000 daltons and an average particle diameter of 100-120 nm.

Examples 8 and 9 (the floor. 8 and 9)

The effect of the average particle diameter

The particle size of the polymer dispersion change by changing the surfactant and the ratio of seed monomer raw material monomer. Use another surfactant, namely Rhodafac RK500 instead of Rhodafac RS710 used in example 1.

Both options have the following Monomeric composition, calculated in wt.%

ArticleMMABAMAA
35,027,6to 33.83,6

TC is equal to 30°C.

Example 8 (the floor. 8)

Equip 2 liter reactor with a stirrer, means for blowing nitrogen, water fridge and a suitable input for adding measured quantities of reagents. In the reactor add 662,7 g of demineralized water and then download 2.1 g seed surfactants Rhodafac RK500 and buffer solution (containing 1.68 g of phosphate heptahydrate, sodium and 12.6 g of demineralized water). The temperature of the contents was raised to 75°C using water is Ani. When the content is heated to 75°C, add in the reactor to 30.1 g of seed monomer mixture (containing 10.5 g of styrene, of 8.3 g of methyl methacrylate, 10.2 g of butyl acrylate and 1.1 g of methacrylic acid). The temperature is held at 75°C for 10 minutes, then add 8 g of initiator solution (containing 2.1 g of ammonium persulfate and 5.9 g of demineralized water). The mixture was kept at 75°C for 15 minutes, then simultaneously add 571,9 g raw monomer mixture (containing 200,2 g of styrene, 157,8 g of methyl methacrylate, 193.3 M. g of butyl acrylate and 20.6 g of methacrylic acid) and to 63.8 g of the solution of surface-active substances (containing 14,42 g AMPS2405 [2-acrylamide-2-methylpropanesulfonate sodium], 9,38 g of Rhodafac RK500 and 40 g of demineralized water) for 3 hours. After completion of all additions maintain the temperature of the dispersion at 75°C for 10 minutes and added 10.1 g of the final load (containing 0.3 g of formaldehydeinduced sodium and 9.8 g of demineralized water). After a 10-minute exposure temperature, add more of 10.2 g of the final load (containing 0.4 g of tert-butyl hydroperoxide and 9.8 g of demineralized water). After another 10-minute exposure temperature, add the last of 10.1 g of the final load (containing 0.3 g of formaldehydeinduced sodium and 9.8 g of demineralized water). Can withstand temperatures up to 75°C for 15 m of the nut, then the dispersion is cooled to 30°C and add 7 g of concentrated ammonia solution (35% concentration) with the subsequent addition of biocide (Rocima Product VI 89, 1.54 g dissolved in demineralised water)to protect the polymer from microbiological cultures.

The average particle diameter equal to 252 nm.

Example 9 (the floor. 9)

Variant with a different particle size (R10934/53, PS=179 nm) is carried out in accordance with the method and formulation of example 8, except that the use of 60.2 g of seed monomer download and 541,8 g Monomeric raw materials.

The average particle diameter equal to 179 nanometers.

Obtaining a WATER DISPERSION of the OLIGOMER

Example 1 (oligomer 1 olig)

2-liter flat-bottomed flask provided with a stirrer, means for blowing nitrogen, water fridge and a suitable input for adding measured quantities of reagents. Add to the flask 297,72 g of water followed by the addition 3.88 g of surfactant Emulsogen EPA 1954, and heated to 50°C using a water bath. Over time heat gain emulsion raw material monomer, adding 239,00 g of butyl acrylate, 310,70 g of methyl methacrylate, 35,07 g of methacrylic acid, 17,98 g n artilleryman and 11.74 g of soybean oil to 432,54 g of water in which dissolved 51,41 g surfactant Emulsogen EPA 1954. The mixture emuleret using the apparatus of the emulsion is investing Silverson for about 8 minutes. After water loading is heated to 50°C in flask add the initiator to 2.41 g hydroxyperoxide tert-butyl and after 10 minutes, the emulsion raw material monomer added at the same rate for 3 hours. Private activator download (containing 0,70 g of sodium ascorbate in 68,95 g of water) are added simultaneously. The temperature of the support 50°C for all downloads of raw materials. After the substrate temperature of the resulting oligomeric dispersion support 50°C for another 15 minutes, during which adds a portion of the activator (containing 0,23 g of sodium ascorbate in 23,17 g of water). After a further 1 hour at 50°C oligomeric dispersion is cooled to 35°C. and add a solution of biocide (containing 1.50 g Rocima VI 89, dissolved 3.00 g of water). The dispersion is filtered before use.

TC=20°C

The average particle diameter equal to 110 nanometers

The mass-average molecular mass equal 10500 Dalton.

Examples 2-5 (olig-5)

The effect of molecular weight

Examples 2-6 is carried out in accordance with the method and the recipe that was used for example 1 with the difference that the number of n-artilleryman (in grams) varies as shown below for regulating molecular weight.

ExamplePOM Molecular weight
No. 230.006300
No. 313.5813600
No. 49.1219700
No. 54.5342000

The average particle diameter of samples 1-5 is in the range from 105 to 115 nanometers.

All the oligomers have a Fox TC 20°C

Examples 6-10 (olig-10)

The effect of TC

Examples 6-9 carried out according to the same method and recipe that used for example 1. The relative amount of the acrylic monomers used in the monomer raw material of the emulsion, in wt.%, varies as described below, in order to pick up the Vehicle.

ExampleMMABAMAATC
No. 6of 40.953,16,00°C
No. 747,047,06.0 10°C
No. 8of 58.935,16,030°C
No. 964,229,86,040°C
No. 1069,324,76,050°C

The mass-average molecular weight samples 6-9 is in the range from 10,000 to 11500 daltons and a particle size of from 105 to 115 nanometers.

PREPARATION of PAINTS

Example K1

The paint is obtained on the basis of the polymer of example 1 and the oligomer of example 1 using the following method.

Stage 1. Obtaining a dispersion of the pigment

Water (9,96 g) load 0.5 litre metal container and then adding Rocima VI 89 (1.0 g), Orotan 681(6.4g), Tego Foamex 1488 (1.2 g), Matilde-proposal (13,16 g), Texanol (6.85 g), and Empimin OT75 (0.4 g). All stirred at 500 rpm for approximately 5 minutes using a high speed dispersing device, equipped with a Cowles blade. Then Tioxide TR52 (112,47 g) is added slowly to the reactor and the speed of the stirrer is gradually increased up to 2000 rpm Then into the reactor add Acrysol RM 2020 (of 10.76 g) and the mixture stirred for 15 min is t at 2000 rpm/min

Stage 2. Getting paint

The polymer of example 1 (to 150.7 g) and the oligomer of example 1 (is 171.3 g) is placed in a 1 liter metal container and stirred using a paddle stirrer at about 300 rpm ammonia Solution (35% in water) was added dropwise under stirring at about 400 rpm to bring the pH between 7 and 8. The pigment dispersion from stage 1 (162,20 g) is added to the container and stirred at the same speed. Add propylene glycol (7,10 g) and water (11.6 g) and the mixture is stirred for 10 minutes at a speed of about 700 rpm

Ink viscosity is measured with 10000-1using ICI viscometer cone-plate (available from REL Ltd, Middlesex, UK) at room temperature and found that the viscosity of 0.3 PA·S.

Other paints

Other paint K2-K get under way and the recipe K1, but replacing the polymer and oligomer in different ways and the specified value.

PaintOligomerPolymerThe ratio (olig.: floor.)
K2Olegfloor. 211
K3Oleg floor. 311
Q4Olegfloor. 411
C5Olegfloor 511
K6Olegfloor. 611
K7Olegfloor. 711
K8Olegfloor. 811
K9Olegfloor. 911
K10Olegfloor. 111
COlegfloor. 111
PaintOligomerPolymerThe ratio (olig.: floor.)
K12Olegfloor. 11:1
K13Olegfloor. 11:1
K14Olegfloor. 11:1
K15Olegfloor. 11:1
COlegfloor. 11:1
R17Olegfloor. 11:1
K18Olegfloor. 11:1
COlegfloor. 1COlegfloor. 10,18:1
COlegfloor. 1of 0.43:1
COlegfloor. 1of 0.67:1
COlegfloor. 11:1
K24Olegfloor. 12,33:1
COlegfloor. 11:0

The ratio indicates the relative amount of the oligomer to the polymer, wt%, relative to the solids content of the dispersions.

The viscosity of all colors is measured by the viscometer cone-plate" and find that it is in the range from 0.15 to 0.30 PA·s

The example for comparison KA

The sample designated as the dye of example 4 in WO 03/082999A1, again using the procedure and recipe on page 40, lines 5-12, included is a reference in this description. Since in this paper there is no guidance on what pigment paste to use, then use the pigment dispersion from step 1 above.

Oligomer D3 used in the paint of example 4, obtained using the procedure and recipe on page 34, line 39, at page 35, lines 5-18, incorporated by reference in this description. Oligomeric dispersion has a bulk solid content of 30.6%, molecular weight of the oligomer is 17,500, and the average particle diameter equal to 115 nanometers.

The polymer P1 is obtained using the procedure and recipe on page 37, lines 1-18, the contents of which are incorporated by reference into this description. Polymer dispersion has a bulk solid content of 52.1%, and the average particle diameter equal to 419 nm. The molecular weight could not be measured, since the polymer particles are not soluble in the solvent, which shows that the polymer has a very high molecular weight.

The paint has a viscosity according to the method of "cone-plate" 0,18 PA·s

Gloss, setting time, drying time with sand, hardness and stain removal for paints K1-K measured in accordance with test procedures described below. The results are given in tables 1, 2 and 3.

TEST PROCEDURES

The following procedures are used to OC the NCI quality paints.

Gloss

Gloss is measured by the distribution of the coating from the sample paint onto the glass panel using a 100-micron block allocator. All dried at room temperature for weeks, and the gloss measured at 20°C with a normal exploitation of gloss Tri-Microgloss. Blackmer measures the amount of light reflected from the painted surface at an angle, defined as the percentage of the incident light.

Setting time

Setting time estimate using the method described in WO 03/082999, which is shown below. Sample wet paint, felt, applied using a wire bar (K-bar 9) on the test map (18×24 cm, form 8B, available from the Leneta Company) to obtain a wet paint film thickness of about 120 microns. The setting time is determined by applying the paint with uniform intervals on a clean area of 75 cm covered with cards with a brush, carry a lot of paint, which have, within 30 seconds.

At this time, the brush is driven by established technique, including 5 times in the direction of the width of the substrate and 5 times in the direction of the length of the substrate. Then wet the paint is dried in a horizontal position for 24 hours before visual assessment of the coating. When the composition is applied by brush, no longer forms a homogeneous layer with a coating, Nanase the tion using a wire rod, I believe that the time setting is completed.

Dirt-resistant

Get smooth opaque dried paint film. Before testing the sample dried paint left for aging for 24 hours at 18-25°C. the Samples Ribina (blackcurrant juice), coffee, tea, curry, DEB (painted industrial quality tool for hand washing), red wine, oil, ketchup, crayon, coloured crayon, Shoe Polish, tooth paste and mustard put on the dry paint film and after 30 minutes wash with a sponge. Then watertow paint film evaluate on a scale from 1 to 4 in accordance with the amount of dye remaining in the paint.

1) the Stain is fully removed

2) Left a small stain

3) Remained the average spot

4) Remained intense spot

Individual assessment of spots fold to get a picture for General stains left on the paint for all dyes used and the results are expressed as percentage of the total possible contamination (i.e. the total number of spots×4).

The drying time with sand (British Standard 3900, part C2)

Sample wet paint is applied to a thoroughly cleaned glass panel using a 100-micron block allocator. On the surface of the film form the track of sand (Double H Silver Sand from Tricentrol) at 20°C. from the hopper for moving over prisoner is Oh with a speed of 2.54 cm/hour. The hopper is moved up until the paint is dry to the touch, or until until the hopper is not fully take place glass panel. The distance at which the sand stuck to the paint film, measured and transferred into the drying time in hours.

Hardness

The hardness of the dried film of paint for 1 week measured in accordance with DIN 53157 test.

The average particle diameter

Conduct measurements to test the diluted sample using the particle size analyzer model Mastersizer 2000.

Molecular mass

Waters 150 CV supply columns 2×30 cm PLGel Mix D GPC operating at 35°C at a flow rate of 1 ml/min, and using tetrahydrofuran (THF) as eluent. A sufficient amount of polymeric or oligomeric dispersion is dissolved in THF, to obtain solids concentrations of 1.0 mg/ml Then the samples leave to dissolve for about 4 hours. The solution is filtered through the 0.45 micron PTFE membrane before injection. Injected into the column 200 microlitres the resulting solution. Given the molecular mass is the mass-average relative to polystyrene standards in THF.

Fox TC

The glass transition temperature TCAB...copolymer AB is calculated in accordance with equation Fox

where TCAand TCBthe glass transition temperature of homopolymers monomial the components a and b, in degrees Kelvin, and WAand WB- mass present in the fraction.

Test with a water drop

Wet paint is applied to the test panel Leneta (form 2C) using 100 micron block allocator. The film is dried at room temperature for 20 minutes and then at 50°C for 16 hours. After cooling to room temperature, the films are tested for water resistance by placing the film in a 1 ml drop of water and covering film watch glass. After 4 hours, water is removed and assess the damages.

Resistance to clumping

On two wood panels 7 cm ×30.5 cm ×1.8 cm, British Colombian Pine is applied by brush one floor Dulux Trade Undercoat followed by two coats of the test paint from drying for 24 hours at room temperature, each of the coating. After drying the last of the coating within 24 hours at an ambient temperature of two panels placed one on top of another so that the test colors are combined, and the panel is placed cargo 5 kg After 16 hours the load is removed and record the force required to separate the panels, and damage. Characteristic appreciate the ease of separation of the two panels and the degree of damage done in the tested paint.

Table 1 shows the properties of colors K1-K9, and CA.

Table 2 shows the properties of paints K10-K18.

In t the blitz 3 shows the properties of paints C-C.

Table 1
PaintGloss, %Time of setting, minDrying sand, minHardness,Spots, % remainingNotes
K181101107129
K28561207138
K3866120-36A bad result in the test for resistance to clumping
Q4866120-38A bad result in the test for stability etc is against clumping
C58362204326A bad result in the test with the water drop
K68361704728
K7806606727Unacceptable
appearance when you floor
K86315205052
K96012355352
CA4318-206601070
≤756-10≤200≥30<55The minimum acceptable characteristics
- inability to determine indicator

Table 2
PaintGloss, %Time of setting, minDrying sand-minHardness,Spots, % remainingNotes
K10767756152
C778-10537752
K127174583 52
K13698308850
K14788-102404843
K15788-101205848
C776-8758350
R17796458945
K18335-7158447
CA 4318-206601070
≥756-10≤200≥230<55The minimum acceptable characteristics

Table 3
PaintGloss, %Time of setting, minDrying sand-minHardness,Spots, % remainingComment
C824109634
C794109636
C816 457735
C816507738
C808507338
K247810754852
C13104002257
≥2756-10≤200≥30<55The minimum acceptable characteristics

Although KA, which is the example from WO 03/082999 has a setting time of about 20 minutes, however it has unacceptably low performance in the ex other areas, which buyers consider important. In particular, the gloss is very low, and, indeed, in the expected range reduced properties silk paint, and not glossy. Moreover, the drying time with sand very long, remains stickiness at a touch, and the hardness shows that it remains soft even when dry. Perhaps the difficulty of the stain removal is a consequence of the fact that the paint is so soft.

Paint K1-K4 show the effect of molecular weight additionnal polymer on the properties of dried paint. As you can see, the paint K1-K4 are acceptable setting time from 6 minutes to 10 minutes and gloss from 80 to 86%. However, both these paints are based on polymers with a molecular mass of 53000 Dalton and below do not stand the test of resistance against adhesion and, therefore, are unacceptable.

Paint K5-K7 show the effect of TC additionnal polymer on the properties of dried paint. All these paints are acceptable setting time and gloss. However K5-based polymer with a TC Of 0°C is unacceptably long drying time with the sand and does not stand up to the test with a water drop. K7-based polymer with TC 40°C is unacceptably rough top layer when completely dry the first coating is applied the second floor.

Paint K8 and K9 show the effect of the average particle diameter additionnal polymer clay is and on the properties of dried paint. The gloss is unacceptably low at 179 nm and above. By interpolating the maximum diameter found that if the average particle diameter of about 159 nm gloss below 75%.

Paint K10-K13 show the effect of mass-average molecular weight additionnal oligomer on the properties of dried paint. From table a molecular weight of about 15,000 daltons installed as the molecular weight of the oligomer, which will lead to the gloss of at least 75%.

Paint K14-K18 show the effect of TC additionnal oligomer on the properties of dried paint. When TC 0°C the paint is unacceptably long time to touch, and at 50°C and higher gloss is unacceptably low.

Paint C-C show the effect of the measurement of the ratio of the oligomer to the polymer on the properties of dried paint. At least the proportion of the oligomer of 0.18:1 (equivalent 15,25% of the combined solid oligomer and polymer) setting time unacceptably low, while when the ratio of 0.43:1 (30% oligomer) is a good indicator equal to 6 minutes. Interpolation between these two relations gives the ratio of 0.30:1 (23% oligomer) as the minimum ratio required to obtain acceptable properties. Similarly, the highest ratio of 2.70:1 (73% of the oligomer).

Other paints

C

To paint K1 of example 1 to relax the Ute 4 wt.% blue kolernyh paste, containing 42 wt.% blue pigment 15.3-ftalotsianina.

The example for comparison KB

To sample the AC type 4 wt.% blue kolernyh paste containing 42 wt.% blue pigment 15.3-and phthalocyanine.

Gloss, hardness and drying time with sand K KB and measured in accordance with the procedure described above. The results are presented in table 4.

Table 4
PaintGloss, %Drying sand, minHardness,Notes
C714593
KB37>60016

It is obvious that the advantages of the invention are present in colored colors as well as white.

C

Repeat example K1 except that the thickener Acrysol RM 2020 replace Borchigel L75N the same thickener, which is used to control the paint. This leads to the measured gloss dried paint 83%.

The example for comparison, KS

I repeat the example for cf is Vania KA with the difference, the thickener Borchigel L75N replace Acrysol RM 2020 - the same thickener, which is used in K1. This leads to the measured gloss dried paint 66%.

Thus, low gloss art paint prior art according to WO 03/082999 is not a consequence of the choice of thickener.

The effect of viscosity on the setting time

Repeat example K1 except that they use different numbers Acrysol RM 2020 to obtain viscosity by viscometer cone-plate", changing from 0,145 to 0.30 PA·C. the setting Time of these colors range from 8 minutes to 11 minutes.

1. Pigmented aqueous composition for coating having after drying gloss of at least 75%containing: pigment, (i) the aqueous dispersion is not capable of binding additionnal oligomer with mass-average molecular weight of from 5000 to 15000 D. Fox and calculated TC is greater than 0°and less than 50°C;
ii) an aqueous dispersion additionnal polymer with a mass-average molecular weight of more than 53000 D, calculated Fox TC greater than 10°C or less 40°C and an average particle diameter of less than 150 nm;
moreover, the relation (i):(ii) ranges from 0.25:1 to 2.7:1 in the calculation of the wt.% solid substances.

2. Composition for coating according to claim 1, where the polymer and the oligomer produced from Monomeric mixtures containing esters of (meth)acrylic acid and optionally styrene and its derivatives.

3. Composition for covered what I according to any one of the preceding paragraphs, where the oligomer further comprises links (meth)acrylic acid.

4. Composition for coating according to claim 3, where the oligomer has an acid number of from 25 to 55 mg KOH/g

5. Composition for coating according to any one of the preceding paragraphs, where the oligomer has a mass-average molecular weight of 7500 to 12500 D.

6. Composition for coating according to any one of the preceding paragraphs, where the oligomer does not contain methacrylate of methoxypolyethyleneglycol.

7. Composition for coating according to claim 1, having a setting time of 6±1 12±3 min, but not more than 15 min and having a gloss after drying at least 75%.

8. Composition for coating according to claim 7, the setting time is from 6±1 12±3 minutes

9. Composition for coating according to any one of the preceding paragraphs, optionally containing ingredients selected from the group consisting of fillers, waxes, solvents, rheology modifiers, dispersing agents, substances that promote the spreading and biocides.

10. The method of applying the coating to the substrate, comprising applying on the basis of the composition according to any one of the preceding paragraphs and forced or natural drying of the specified coating for the formation of the solid layer with a gloss of at least 75%.

11. Applying a combination of the polymer with the mass-average molecular weight of more than 53000 D, calculated Fox TC greater than 10°C or less 40°C and an average particle diameter of less than 150 nm and not capable of binding additionnal oligomer with mass-average molecular weight of from 5000 to 15000 D. Fox and calculated TC is greater than 0°and less than 50°C to obtain improved pigmented aqueous composition for coating, which has a setting time of 6±1 12±3 min, but not more than 15 minutes and has a gloss after drying at least 75%.

12. The application of claim 11, where the setting time is from 6±1 12±3 minutes

13. Way to obtain is not capable of binding additionnal oligomer with mass-average molecular weight of from 5000 to 15000 D. Fox and calculated TC is greater than 0°and less than 50°C, including the stage of receiving the monomer in water emulsion by:
i) mixing the monomers, water and a surfactant and optionally a hydrophobic material to form a mixture;
ii) exposure to a mixture of (i) high shear using equipment for intensive mixing with the formation of the monomer in water emulsion;
and polymerization of the monomers and the formation of a dispersion of additionnal oligomer.



 

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3 cl, 21 ex, 10 tbl

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: invention relates to processing plastics, specifically to a polyester composition for protective coating metal surfaces. A polyester composition is described, containing the following in wt %: polyethyleneterephthalate - 10.0-92.5, dimethylphthalate and/or diethylphthalate - 4.5-87.0, copolymer of ethylene with vinyl acetate - 1.5-12.0, hydroquinone - 0.1-0.8, heat stabiliser - 0.2-2.5 and talc or basalt as filler - 0.5-12.5.

EFFECT: proposed polyester composition provides 1,5 times increase in strength and 1,5-2 times increase in adhesion strength to steel at 20°C.

2 cl, 14 ex, 2 tbl

FIELD: chemistry.

SUBSTANCE: thermoplastic for marking automobile roads and aerodromes contains polyester resin with melting point of 70-85°C and acid number 35-40 mg KOH/g, obtained based on phthalic anhydride and glycerin in amount of 20-30 wt %, rutile titanium dioxide in amount of 3-10 wt %, white quartz sand 21-37 wt %, glass microspheres in amount of 4-24 wt %, Laprol 3003 - polyether with molecular weight of 3000 based on propylene and ethylene oxides in amount of 1-10 wt % and 10-30 wt % crushed marble.

EFFECT: thermoplastic is characterised by high wear resistance, does not cause skidding, dries fast when deposited on the road surface, has good adhesion to the road surface and can be used in different climatic regions under the temperature of -40°C - +40°C.

2 tbl, 3 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: polymers, paint and varnish materials.

SUBSTANCE: invention relates to polycarbonate-base compositions used for applying covers. Polymeric paint and varnish composition comprises the following components, mas. p. p.: polycarbonate based on bisphenol A with molecular mass 26000-36000 Da, 12.0-14.0; polymeric adhesive as a plasticizer, 1.5-4.2; copolymer acrylonitrile-butadiene-styrene, 0.12-1.4; mineral filling agent chosen from the group of mineral small-dispersed materials: aluminum powder, titanium dioxide, alkali-earth metal salts, talc, microwollastonite, 0.6-26.0; dye chosen from the order of phthalocyanine dyes or color mineral pigments, 0.1-1.4; polyoxyethylene sorbitan monooleate (Tween-80) as a surfactant, 0.001-0.01, and chlorinated aliphatic solvent, the balance. Invention provides the development of polymeric paint and varnish composition rapidly drying in natural conditions that allows preparing arbitrarily colored covers on different building materials being without deterioration of adhesion.

EFFECT: improved and valuable properties of composition.

3 cl, 1 tbl, 9 ex

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