Polyurethane coatings having improved interlayer adhesion

FIELD: chemistry.

SUBSTANCE: coating for application to worn surfaces comprising composition including at least one curable polyurethane and at least one chlorinated polyolefine which provides improved adhesion to a worn surface as compared to adhesion of a coating composition including the same at least one curable polyurethane but not including at least one chlorinated polyolefine. The method of refinishing a worn surface comprises application of a curable polyurethane top finishing coating that includes at least one chlorinated polyolefine to the worn surface, and curing the curable polyurethane top finishing coating, wherein, before application of the curable polyurethane top finishing coating, the worn surface is treated with a solvent without any mechanical scraping.

EFFECT: improved interlayer adhesion.

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The technical field to which the invention relates.

This description refers to compositions intended for re-finishing of surfaces subjected to wear, and ways of re-finishing of surfaces subjected to wear, the coating compositions containing at least one chlorinated polyolefin.

Prior art

During use, the surface may be subjected to wear. The term "surface subjected to wear" in accordance with the usage in this document refers to the surface, physical and/or chemical properties which have deteriorated in comparison with what occurs for the new surface. The wear surfaces may be a result of, for example, mechanical abrasion, impact, water, solvents, temperature, radiation, moisture, atmospheric conditions, and/or other mechanisms that cause deterioration of physical and chemical properties, as well as aesthetic characteristics of the surface. "The surface is subjected to wear, also includes surface properties are deteriorated in comparison with their status at initial use, where the degradation is a result of brief exposure to stress in comparison with the wear of the m, which may be a result of long-term exposure to one or more state voltage. For example, the surface may become damaged as a result of the availability of sources of mechanical damage, such as abrasion, shock and the like, of stress, such as caused by the presence of sources of mechanical and/or thermal treatment, excessive temperatures, solvents, exposure and the like. In practice, it may be helpful to re-finishing the surface subjected to wear, in order to restore the physical, chemical and/or aesthetic characteristics of the surface.

The surface may include, for example, coating, metal surface or polymer surface. Coverage can include multiple layers of coating that ensures the achievement of certain specified characteristics. For example, the primer coating can be applied on a metal surface to obtain improved corrosion resistance or on the polymer surface to improve the adhesion of subsequently applied layers, while the top of finishes you can choose, with the purpose of obtaining such properties as resistance to solvents, resistance to atmospheric effects is to textbooks, abrasion resistance, hardness and/or aesthetic characteristics. It is possible to develop coatings with improved adhesion characteristics with respect to the surfaces and the coating layers. In some cases, the main function of the coating, such as a primer coating or binder coating may be to provide adhesion between the opposite layers of the coating. The aviation and aerospace aircraft often are first applied coating to form a primer coating based on epoxy or polyurethane and hardener, and over it put a floor in the form of a curable polyurethane top finishes, which has resistance to water and organic solvents, such as aviation fuel and hydraulic fluid systems.

The adhesion between the individual layers of the coating and between the substrate and the layer covering the substrate, can contribute to the overall performance of the coating. If the item coverage is applied for the first time, then the quality of the coating may be identical or similar physical and chemical parameters over the entire surface. However, for example, in the case of surfaces, used, subjected to wear and/or injured, and, in particular, if b is increased surfaces, such as in aircraft, the surface intended for coating and/or re-finishing may be non-uniform.

If re-finishing will need to expose a large surface, such as an aircraft, then the trim at the top floor before re-staining can be removed with a solution to remove the coating. To avoid the need for pre-treatment of fresh metal surface and re-apply a new primer coating may be useful to remove before re-staining of only the upper layer of finishes. Nabukenya, detachable top finishes and methods of removal of top finishes while maintaining the metal surface of the cured primer coating are described in U.S. patent No. 6217945, incorporated herein by reference. Although the methods and compositions designed for the selective removal, or separation, top finishes while maintaining the cured primer coating intact and adhering to the surface of a metal substrate, and have been designed, however, to facilitate obtaining good adhesion between the top finishing coating is m and utverzhdennym primer coating before applying a new top finishes utverjdenie primer coating would need to be prepared for that.

In certain applications it may be useful applying polyurethane top finishes on the surface subjected to wear, such as subjected to wear, without prior removal of the coating subjected to wear. However, the adhesion of the polyurethane coatings to surfaces subjected to wear in General is poor. In poor adhesion between the new polyurethane top finishing coatings and coating subjected to wear, can contribute to such surface phenomena on the surface subjected to wear, as chalking, the presence of surface micropores and the presence of trapped water.

To facilitate and/or improve the adhesion of the polyurethane top finishes for surfaces exposed to wear, before applying polyurethane top finishes surface subjected to wear, can be subjected to mechanical grinding. Mechanical cleaning of the surface subjected to wear, can be realized, for example, as a result of Stripping the abrasive cloth. Cleaning the abrasive cloth large surfaces, such as those that have aircraft can be expensive, time consuming and difficult from the point of view of monitoring the extent to which the traveler is required to facilitate a homogeneous adhesion of the freshly applied top finishes. In addition, the method of mechanical Stripping can lead to the release of particles containing potentially harmful and/or toxic chemicals.

It is therefore suitable for use may be a method of improving the adhesion between the polyurethane top finishing coatings and surfaces subjected to wear, alternative mechanical Stripping.

Disclosure of the invention

Proposed composition of the coating containing at least one curable polyurethane and at least one chlorinated polyolefin, where the coating composition provides improved adhesion to the surface subjected to wear, in comparison with the adhesion of the coating composition containing the same, at least one curable polyurethane, but in the absence of at least one chlorinated polyolefin.

We propose a method of re-finishing the surface subjected to wear and tear, including the treatment of the surface subjected to wear, the application of a curable polyurethane top finishes containing at least one chlorinated polyolefin, on the processed surface is subjected to wear, and curing curable polyurethane top of finishes.

Features SPO is about re-finishing the surface subjected to wear and tear, including the treatment of the surface subjected to wear, the application of binder coating containing at least one chlorinated polyolefin, on the processed surface is subjected to wear, the drying of the binder of the coating, application of a curable polyurethane top finishes on the binder coating and curing curable polyurethane top of finishes.

Unless other specified, all numbers expressing quantities of ingredients, the conditions of the reactions and the like, used in the description and the claims should be construed as in all cases modified by the term "approximately". Accordingly, unless indicated to the contrary, the numerical parameters set forth in this document are approximate values that may vary depending on the received desired properties.

It may be useful to the coatings used for finishing and re-finishing finishing certain surfaces, such as surfaces of aircraft, would demonstrate the presence of hardness, resistance to water and solvents, can easily be applied and the result would obtain films with high the m level of brilliance. In these applications can be used in the compositions of the coatings containing hydroxypentanal polymer, such as a complex polyester or acrylic polymer and the polyisocyanate. Composition of two-component polyurethane coatings may contain an organic polyisocyanate in a single component, herein sometimes referred to as "isocyanate component", and hydroxyl-containing polymer, such as polyetherpolyols on the basis of ester, polyetherpolyols on the basis of simple ether or hydroxyl-containing acrylic polymer, in another component. This component is herein sometimes referred to as "polyol as one component. Two components stand separately from each other until the moment immediately preceding the application. After applying the polyisocyanate and the polymer polyol react with the receipt of the cured polyurethane coating. The reaction between hydroxypentanal polymer and polyisocyanate can proceed at room temperature, and to accelerate the reaction it is possible to add catalysts. In the composition of any two components can include other ingredients such as pigments, solvents, catalysts, additives and the like. Two-component polyurethane coatings and adhesives are known (see U.S. patent No. 4341689, for example) and to mirceski available. An example of a commercially available composition of two-component polyurethane coating is DESOTHANE SA 2000 (PRC-DeSoto International, Inc. Burbank, California).

To obtain high quality coatings can also be used and one-component polyurethane compositions, cured in a humid environment. Cured in a humid environment polyurethane polymers can be obtained by carrying out the reaction between stoichiometric excess of organic MDI and polymeric polyol such as polyetherpolyols on the basis of ester, polyetherpolyols on the basis of simple ether or hydroxyl-containing acrylic polymer, to obtain polyisocyanate polymer. The polyisocyanate composition of the polymer can be with solvents, pigments, additives and the like to obtain the coating composition. An example of a commercially available polyurethane coatings, cured in a moist environment, is a polyisocyanate DESMODUR E (Bayer Corporation, Pittsburgh, Pennsylvania).

Composition of two-component and one-component polyurethane coatings can be obtained either in the form of the composition is water-based, either in the form of a composition containing an organic solvent. In certain embodiments of the organic solvent may be an aliphatic or aromatic ug is avodart, such as toluene or xylene, an alcohol such as butanol or isopropanol, an ester such as butyl acetate or ethyl acetate, a ketone such as acetone, methyl isobutyl ketone or methyl ethyl ketone, a simple ester, a partial ester of a polyhydric alcohol or ether of alkoxysilane or mixture of any components of the above. The polyurethane coating composition may contain one type of polyurethane polymer or may contain a mixture of different types of polyurethane polymers.

To obtain a curable polyurethane coatings with improved adhesion to the surface subjected to wear, the composition is curable polyurethane coatings produced water-based or solvent, can be added, at least one chlorinated polyolefin. In certain embodiments of the amount of chlorinated polyolefin in the composition curable polyurethane coating may be in the range from 1 wt.% up to 10 wt.% from the composition, and in certain implementations may be in the range from 2.5 wt.% up to 5 wt.%, when this percentage is obtained when the calculation of the total mass of the solid resin component of the composition.

In the composition of the polyurethane coating may be included any chlorinated polyolefin, such as grafted chlorinated, polyolefin is s, unvaccinated chlorinated polyolefins, modified chlorinated polyolefins, unmodified chlorinated polyolefins, chlorinated polypropylene, chlorinated polybutene, chlorinated polyethylene and mixtures thereof. Chlorinated polyolefin polymers may have a mass-average molecular weight in the range from 5000 to 200000 D, and in certain embodiments of in the range from 10000 to 40000 D according to the definition by the method of gel chromatography using a polystyrene standard. In certain embodiments of chlorinated polyolefin polymer may be chlorosulphurized olefinic polymer or a mixture of chlorinated polyolefin polymer and chlorosulfonated olefin polymer, where chlorsulfuron can be realized as a result of the reaction between vaccinated or unvaccinated a polyolefin and chlorsulfuron agent.

Unvaccinated olefin polymers intended for chlorination, can be homopolymers α-monoolefins containing from 2 to 8 carbon atoms, or copolymers of ethylene and at least one monomer with the unsaturation of ethylene type, such as α-monoolefins containing from 3 to 10 carbon atoms, complex alkalemia esters containing from 1 to 12 carbon atoms, ninasimonevevo acids, containing from 3 to 20 carbon atoms, unsaturated mono - or dicarboxylic acid containing from 3 to 20 carbon atoms, and complex vinyl esters of saturated carboxylic acids containing from 2 to 18 carbon atoms.

Resin-based graft copolymer can be represented as products of reaction between α-olefinic polymer and engrafting agent. Alpha-olefin Homo-polymer of one or a copolymer of two α-olefin monomers containing from 2 to 8 carbon atoms include homopolymers, such as the following, but not limited to: polyethylene and polypropylene, and copolymers, such as copolymers of ethylene/propylene, copolymers of ethylene/1-butene, copolymers of ethylene/4-methyl-1-pentene, copolymers of ethylene/1-hexene, copolymers of ethylene/1-butene/1-octene, copolymers of ethylene/1-the mission copolymers, ethylene/4-ethyl-1-hexene and copolymers of ethylene/4-ethyl-1-octene. Chlorinated grafted polypropylene can be obtained by carrying out the chlorination in the solution is modified by grafting of polypropylene homopolymer or copolymer of propylene/α-olefin. Graft polymerization can be done in the presence of free-radical catalyst in a solvent which is inert to chlorination. Suitable for use with solvents are torbenson, glorf orbinson, carbon tetrachloride, chloroform and the like. In certain embodiments of grafted polypropylene may be resin bases that were subjected to inoculation using α,βunsaturated anhydride with obtaining chlorinated polyolefin modified by acid and/or anhydride. Examples of engrafting agents include maleic acid, maleic anhydride, fumaric acid and the like.

In certain embodiments of the chlorinated polyolefin may include grafted acrylic chlorinated polyolefin. In certain embodiments of the grafted acrylic component may be present in the range of 10 wt.% up to 90 wt.% from the total mass of the grafted acrylic chlorinated polyolefin. In certain embodiments of the grafted acrylic component may be from 30 wt.% up to 60 wt.% from the total mass of the grafted acrylic chlorinated polyolefin.

Modified chlorinated polyolefins include chlorinated polyolefins, modified by acid or anhydrous group. Modified chlorinated polyolefin resin can be obtained as the result of vaccination, for example as a result of free-radical grafting one or more compounds selected from unsaturated what's polycarboxylic acids and anhydrides of the corresponding acid, on chlorinated polyolefin resin to obtain a chlorinated polyolefin resin modified by acid and/or anhydride. Examples of modified chlorinated polyolefins are described in U.S. patent No. 4997882 (fragment from column 1, line 26 to column 4, line 63); 5319032 (fragment from column 1, line 53 to column 2, line 68); and 5397602 (fragment from column 1, line 53 to column 2, line 68), all of which are included herein for reference. Chlorinated polyolefin can be characterized by the level of chlorine in the range of 10 wt.% up to 40 wt.%, in certain embodiments of in the range of 10 wt.% up to 30 wt.%, when calculating the mass of polyolefin, that is, non-chlorinated polyolefin. Examples of modified chlorinated polyolefins include modified chlorinated polyolefins, characterized by the level of chlorine in the range of 10 wt.% up to 30 wt.% when calculating the total weight of the polyolefin, at least partially neutralized with the amine and wherein the acid number in the range from 50 to 100. Additional examples of modified chlorinated polyolefins include water dispersion containing water, a coalescing solvent and the dispersed phase resin present in an amount in the range from 20 wt.% to 100 wt.%, in the form of at least partially neutral is savannaha modified chlorinated polyolefin, obtained by heating the chlorinated polyolefin together with a hydrocarbon acid containing at least 7 carbon atoms, in the presence of a free radical initiator. Such modified chlorinated polyolefin can be present in an amount in the range from 20 wt.% to 100 wt.% from dispersion in water with organic joint solvent.

In certain embodiments of chlorinated polyolefins that can be used to obtain a cured polyurethane coatings with improved adhesion, commercially available. These materials can include a mixture of materials polyolefin feedstock, which may be by-products of other chemical processes. As such, the exact composition of the polyolefin main chain of commercial materials may vary from batch to batch. Chlorinated polyolefin suitable for use in the compositions and methods described herein can be selected from commercially available compositions, such as, for example, chlorinated polyolefin 343-1, 343-3 and 515-2 available in the Eastman Kodak company (Kingsport, Tennessee). In certain embodiments of the chlorinated polyolefin resin can be obtained in the form of a solution. For example, in certain embodiments of lorraway the polyolefin may be a solution of the grafted acrylic chlorinated polyolefin (40 wt.% grafted acrylic component and 60 wt.% chlorinated polyolefin component) in xylenes concentration 24 wt.%, such as RC-63-3885 (PRC-DeSoto International, Inc.).

Chlorinated polyolefin can be obtained in the form of a dispersion in water or a dispersion containing a solvent that can be added to the composition of the polyurethane coating. The polyurethane coating composition suitable for use in compositions of water-based coatings can be obtained by mixing aqueous dispersions of chlorinated polyolefin or a mixture of chlorinated polyolefin or a mixture of chlorinated polyolefin and water composition of the polyurethane coating. Examples of aqueous dispersions of chlorinated polyolefins are described in U.S. patent No. 5319032 and 5397602. In certain embodiments of a chlorinated polyolefin or a mixture of chlorinated polyolefins can be suspended in an organic solvent and then mixed with the aqueous dispersion of polyurethane. Polyurethane can be atomized in water when using any of the methods known at the present level of technology. A coating composition suitable for use in the compositions of the coatings containing the solvent, can be obtained by mixing chlorinated polyolefin or mixtures of chlorinated polyolefins with polyurethane coating composition containing a solvent.

In the compositions of two-component polyurethane coatings, what about the least one chlorinated polyolefin can be added to either the isocyanate component or the polyol as one component or as to the isocyanate and polyol as one of the components. In certain embodiments of at least one chlorinated polyolefin can be added to the polyol as one component.

In certain embodiments of the polyurethane coating composition containing chlorinated polyolefin may additionally contain solvents, pigments and other additives in General are known for their suitability for use in the compositions of organic coatings containing film-forming resin. Common data classes of additives include fillers, plasticizers, antioxidants, agents that kill the mold, and agents that kill fungi, surfactants, wetting and thickening agents, catalysts and various modifiers fluidity. Data optional solvents, pigments and/or additives may be present in a number that goes up to about 40 wt.% when calculating the total mass of the solid phase composition of the coating.

A coating composition containing at least one curable polyurethane and at least one chlorinated polyolefin, can be used as an upper finishes when re-finishing Department is the CTL surface, subjected to wear. The surface may include, for example, a coating, a metal substrate, polymer substrate, and combinations thereof. Coverage may include coverage, exposed to wear and tear, or floor, which was subjected to the separation of the covering layers of the coating, and may include a primer coating and top finishes, such as polyurethane top finishes. In certain embodiments of the surface can be a surface of aviation or aerospace aircraft or coating located on the surface of aviation or aerospace aircraft. In certain embodiments of the surface may be a polyurethane substrate.

In certain embodiments of a composition curable polyurethane coating containing at least one chlorinated polyolefin, can be applied to the surface subjected to wear, without resorting to the initial mechanical Stripping of the surface subjected to wear. Before applying the curable polyurethane coating containing at least one chlorinated polyolefin, the surface intended for re-finishing, can be subjected to processing. You can use any method is the processing, which allows you to remove particles and a surface film. For example, in certain embodiments of the surface can be rinsed with solvent, wipe it with lint-free cloth, holding a volatile solvent, such as ethanol, methanol, naphtha, white spirit, methyl isobutyl ketone, methyl ethyl ketone, acetone or other suitable solvents. In certain implementations may be used commercially available cleaning solvent, such as DESOCLEAN 120 (PRC-DeSoto International, Inc.).

After processing is subjected to the wear of a surface designated for the coating on the treated surface can be applied curable polyurethane top finishing coating containing at least one chlorinated polyolefin described herein, to any suitable dry film thickness. In certain embodiments of the dry film thickness of the top finishes can range from 6.35 μm to 0.25 mils) to 127 microns (5 mils), in certain implementations it may be in the range of 12.7 μm (0.5 to mils) to 101.6 microns (4 mils), and in certain implementations it may be in the range of 12.7 μm (0.5 to mils) to 50.8 μm (2 mils).

Curable polyurethane top finishing coating containing, for men is our least one chlorinated polyolefin, can be applied to the surface using any suitable method, and may depend at least in part, on the particular composition. For example, the top finishing coating can be applied to the surface in the brush application, spraying, dipping, roller, casting and the like. The methods include spraying spraying under the action of compressed air and spraying in an electrostatic field and include ways of drawing manual and automatic application.

Once cured polyurethane top finishing coating containing chlorinated polyolefin or a mixture of chlorinated polyolefin, will be deposited on the surface, it will be possible to achieve completion of film formation with or without using heat. The time required for curing the top finishes can depend, at least in part, on the ambient humidity, air flow, pressure, solvent vapor, and temperature. In certain embodiments of the curing time of the top finishes can range from 1 minute to 7 days.

The adhesion of the coating composition containing at least one polyurethane and at least one chlorinated polyolefin, can be defined in the line is the use of any suitable way, such as those listed and described in this document.

In certain embodiments of a composition comprising at least one chlorinated polyolefin, can be used as a binder of the coating, providing superior adhesion between which is located underneath the surface and the top finishing coating. In accordance with the usage in this document binder coating called intermediate coating, designed to facilitate or improve the adhesion between which is located underneath the surface, such as floor subjected to wear, and covering his upper decorative coating. In the case of its use as a binder of the coating composition comprising at least one chlorinated polyolefin, can be atomized in an aqueous or nonaqueous solvent. The composition of the chlorinated polyolefin may contain any suitable chlorinated polyolefin, comprising, for example, any of the chlorinated polyolefins described herein. In certain embodiments of the solvent may be a volatile aprotic organic solvent, such as xylene, toluene, diisobutylamine, isobutyl acetate, methoxypropylacetate and the like and mixtures thereof. In certain embodiments of whom is azizia binder coating, containing chlorinated polyolefin may contain from 1 wt.% up to 24 wt.%, at least one chlorinated polyolefin, and in certain implementations it may contain from 5 wt.% up to 10 wt.%, at least one chlorinated polyolefin, based on the total weight of the dispersion (with content in the form of a solid phase and solvent). In certain embodiments of the surface may be more than one floor, derived from the variance, which is designed to obtain binder coverage containing chlorinated polyolefin. In certain embodiments more than one layer of binder coating can be applied using compositions characterized by identical or different expressed in wt.% levels of chlorinated polyolefins, and/or it may contain chlorinated polyolefin other than present in other layers of the binder cover. Pre-printed binder of the coating can be dried prior to application of coatings subsequently, including the additional binder coating and/or the top of finishes.

Before applying to the surface of the binder coating containing at least one chlorinated polyolefin, the surface can be treated using any method that allows the shining to remove particles and a surface film. For example, in certain embodiments of the surface can be rinsed with solvent, wipe it with lint-free cloth, holding a volatile solvent, such as ethanol, methanol, naphtha, white spirit, methyl isobutyl ketone, methyl ethyl ketone, acetone or other suitable solvents. In certain implementations may be used commercially available cleaning solvent, such as DESOCLEAN 120 (PRC-DeSoto International, Inc.). There is no need for mechanical cleaning of the surface prior to or after application to the surface subjected to wear, the binder coating. Binder coating containing chlorinated polyolefin, can be applied using any suitable method, depending, at least partly, from the solvent and expressed in wt.% levels of dispersion, designed to obtain binder coverage containing chlorinated polyolefin. For example, a binder coating containing chlorinated polyolefin can be applied in the brush application, spraying, dipping, roller, casting and the like. The methods include spraying spraying under the action of compressed air and spraying in an electrostatic field and include ways of drawing manual and automatic application.

In certain variant of the x implementation of dry film thickness of the binder cover, component applied to the substrate binding coating containing chlorinated polyolefin may be in the range from 1.27 μm (0.05 to Mila) to 25.4 microns (1 mil), in certain implementations it may be in the range from 1.27 μm to 0.05 mils) up to 12.7 μm (0.5 to mils).

After application of the binder of the coating based on chlorinated polyolefin on the surface of the binder coating can be dried. Binder coating can be dried over a period of time sufficient for evaporation of the carrier solvent and to develop a binder of the coating proper adhesion characteristics. Drying time specific binder coating may depend, at least in part, on the amount used of the solvent, the thickness of the binder cover, vapour pressure of the solvent, temperature and relative humidity and the presence of a current of air at the surface. Appropriate characteristics of adhesion of the binder of the coating develops when the top finishing coating applied over the binder of the coating passes the test for adhesion in the dry state. For example, good adhesion of the binder of the coating develops when the top finishing coating applied over the binder of the coating passes the test with parallel scratches and risks below ug is ω 45 degrees, corresponding to the description of the document BSS 7225, after curing the top finishes at room temperature over a period of time ranging from 1 hour. In certain embodiments of a binder coating can be dried over a period of time ranging from 5 minutes to 24 hours, with proper adhesion characteristics in General are implemented after less than 2 hours.

After the binder coating containing chlorinated polyolefin, will become dry, and it will develop a proper characteristics of adhesion to the binder coating can be applied one or more curable polyurethane top finishing coatings, including, for example, any of those described herein. Curable polyurethane top finishing coat can be applied after the binder of the coating will develop adequate adhesion, which may take from 5 minutes to 24 hours after application of the binder cover. In certain embodiments of cured polyurethane top finishing coat can be applied to the binder coating within 48 hours after application of the binder cover.

In certain embodiments of polyurethane upper finishing coating can include any suitable curable polyurethane in rhree finishing the floor, includes polyurethane top finishes that are described in this document chlorinated polyolefin. Curable polyurethane top finishing coating can be applied on the binder coated using any suitable method of coating described herein. Each of the one or more polyurethane top finishes can be applied to any suitable dry film thickness. For example, in certain embodiments of the dry film thickness polyurethane top finishes can range from 6.35 μm to 0.25 mils) to 127 microns (5 mils), in certain embodiments of from 12.7 μm (0.5 to mils) to 101.6 microns (4 mils), and in certain embodiments of from 12.7 μm (0.5 to mils) to 50.8 μm (2 mils). Curable polyurethane top finishing coating can be cured in accordance with the recommended procedures, including when the ambient temperature.

The amount of adhesion between the polyurethane upper decorative coating and binder coating based chlorinated polyolefin can be defined using any suitable method. For example, the amount of adhesion can be determined by using tests for adhesion in a dry condition, test for adhesion in the wet state on istec the research Institute 7 days and/or tested for adhesion in the wet state after 36 days in accordance with the document BSS 7225 (standard justification description from Boeing). To characterize the adhesion of the coatings may also be used and tested for resistance rotating the farm to the effects of rain erosion. The above test methods are described in this document.

Examples

Certain implementations can optionally be determined by reference to the following examples, which describe in detail methods of re-finishing the surface subjected to wear, and compositions containing at least one chlorinated polyolefin. Specialists in the relevant field of technology should be obvious that without deviating from the data options for implementing in practice, the implementation of a variety of modifications that apply to materials and methods.

Test adhesion

The amount of adhesion to the intermediate layer and the top finishing coatings described herein was evaluated using test methods for adhesion in the dry state, the adhesion in the wet state and the resistance of rotating the farm to the effects of rain erosion.

The amount of adhesion to polyurethane coatings described herein was evaluated using the techniques described in the document BSS 7225 (standard justification description from Boeing). In the test for adhesion in the dry state (type I) on brazzi inflicted risks with engraving needle, for example, obtaining two parallel scratches, remote from each other by 25.4 mm (1 inch), and one risks crossing the parallel risks at an angle of 45±5 degrees (BSS 7225, Parallel Plus 45 Degree Scribes - Class 3). On the surface of the test pieces coated with risk in the area between the parallel risk perpendicular to parallel to the risks and overlapping risks, angled 45 degrees, pressed masking adhesive tape of a width of 25.4 mm (1 inch) coated with rubber or acrylic adhesive, characterized by minimal resistance to flaking, equal of 1.116 g/mm width (60 oz/inch width) when tested in accordance with ASTM D 330, Method A. In one sharp movement of the tape is pulled perpendicular to the sample for testing. After that, subjected to the test area and the tape was examined to identify any areas remote coverage. The coating, which successfully passed the test for adhesion, showed no loss or the presence of a very slight loss of coverage outside of the marks in the document BSS 7225 shows the categorization of 10 and 9 respectively. Assignment to the category of 10 indicates that there is no paint loss along the marks assigned to category 9 corresponds very minor paint loss out scratches. About unsatisfactory edges and testified results corresponding to the categorization of 8 to 1, as it is defined in the document BSS 7225.

The amount of adhesion in the wet state to the intermediate layer and the top finishing coatings was evaluated using the methods described in the document BSS 7225, Wet Adhesion, Immersion Method (Type III). Samples for testing were immersed in distilled water for a period of either 7 days or 36 days. After the specified period of time the samples for testing were removed from the water, wipe dry, and received an estimate of the coating adhesion as described in the test for adhesion in the dry state.

The amount of adhesion to the intermediate layer and the top finishing coatings was also evaluated using resistance tests rotating the farm to the effects of rain erosion. Panel for testing of aluminium 2024-T3 in the form of a curved foil with dimensions inches 76.2 mm × 152,4 mm × 0.81 mm (3 inches × 6 inches × 0,032) were subjected to pre-treatment with the use of chromate conversion coatings corresponding to the document MIL-C-5541 Class 1A. Panel for testing then washed with solvent, wiping them, and dried before coating. After the coatings were applied and dried, the test was dipped in water at 25°for a period of time duration is Yu from 16 to 24 hours prior to testing. Within one hour after removal from the water panel for testing were fixed in the retainer rotating the farm. After that, the samples for 30 minutes at 619,69 km per hour (385 mph) were subjected to irrigation water at the 76.2-101,6 mm per hour (3-4 inches per hour), characterized by the droplet size in the range from 1 to 4 mm, About neprohodimyi trial testified that the coating was peeled off more than 6.35 mm (0.25 inch) from the front edge of the panel for testing.

Example 1

The adhesion of the polyurethane top finishes containing grafted acrylic chlorinated polyolefin, polyurethane coating, subjected to wear and tear

Polyurethane top finishing coat of SA 8000 (PRC-DeSoto International) was added to the dispersion on the basis of grafted acrylic chlorinated polyolefin RC-63-3885 (PRC-DeSoto International, Inc.) in amounts in the range from 2.5 wt.% up to 5 wt.% when calculating the total mass content in the form of a solid phase in the composition of the polyurethane/chlorinated polyolefin. The RC-63-3885 is a solution of grafted acrylic chlorinated polyolefin dispersed in xylene with a concentration of 24 wt.%. On the panel for testing of aluminum alloy 2024 T-3 first was coated using material SA 8000. To ensure wear polyurethane panels for testing or tested is the cure for at least 7 days at ambient temperature (25° (C), or were exposed to the effect of the parameters of the rules for expedited wear at 68°C for 14 days. After this cured coating was purified using ethyl ketone or composition for cleaning DESOCLEAN 120. On top of polyurethane coatings subjected to wear, according to the method of coating the spray struck the top finishing coating containing a dispersion-based chlorinated polyolefin RC-63-3885 and polyurethane SA 8000.

The results of tests for panels for testing, which were subjected to drying at a temperature of 110° (230° (F) for either 4 or 24 hours, are presented in table 1.

Table 1
Polyurethane upper finishing coating containing chlorinated polyolefin
SampleExpressed in wt.% the levels of chlorinated polyolefinThe method of cleaning the top of finishesAdhesion in the dry state (BSS 7225)Adhesion in the wet state after 7 days (BSS 7225)Adhesion in the wet state after 36 days (BSS 7225)
1A0%The composition for the anti-Christ. CI based on IEC Successfully passing testFailure to take the test-
1B2,5%Composition for cleaning based on IECSuccessfully passing testSuccessfully passing test-
1C2,5%UntreatedSuccessful completion of the tests - 10Successful completion of the test - 9Successful completion of the test - 9
1D2,5%DESOCLEA # 120Successful completion of the tests - 10Successful completion of the tests - 10Successful completion of the tests - 10
1ST2,5%Composition for cleaning based on IECSuccessful completion of the tests - 10Successful completion of the tests - 10Successful completion of the tests - 10
1F3%Composition for cleaning based on IECSuccessful completion of the tests - 10Successful completion of the tests - 10Successful completion of the tests - 10
1G3,5%Composition for cleaning based on IECSuccessful completion of the tests - 10 Successful completion of the tests - 10Successful completion of the test - 9
1H4%Composition for cleaning based on IECSuccessful completion of the tests - 10Successful completion of the tests - 10Successful completion of the test - 9
1I4,5%Composition for cleaning based on IECSuccessful completion of the tests - 10Successful completion of the tests - 10Successful completion of the test - 9
1J5%Composition for cleaning based on IECSuccessful completion of the tests - 10Successful completion of the test - 9Successful completion of the tests - 10

The results of tests for panels for testing, which was subjected to drying at a temperature of 110° (230° (F) for either 4 or 24 hours, are presented in table 2.

Table 2
Polyurethane upper finishing coating containing chlorinated polyolefin
SampleDrying time at 230°F (110°)Expressed in wt.% the content of gloriou the frame polyolefin The method of cleaning the top of finishesAdhesion in the dry state (BSS 7225)Adhesion in the wet state after 7 days (BSS 7225)
2A4 hours0%Composition for cleaning based on IECFailure to take the testFailure to take the test
2B24 hours0%Composition for cleaning based on IECFailure to take the testFailure to take the test
2C4 hours2,5%Composition for cleaning based on IECSuccessfully passing testSuccessfully passing test
2D24 hours2,5%Composition for cleaning based on IECSuccessfully passing testSuccessfully passing test
2ND4 hours5%Composition for cleaning based on IECSuccessfully passing testSuccessfully passing test
2F24 hours5%Composition for cleaning based on IECSuccessfully passing testSuccessful prohozhdenie the tests

Example 2

The adhesion of the polyurethane top finishes and a binder coating containing chlorinated polyolefin, polyurethane coating, subjected to wear and tear

The variance of the chlorinated polyolefin RC-63-3885, representing a solution of the grafted acrylic chlorinated polyolefin in xylenes with a concentration of 24 wt.%, bred in the composition D866 (PRC-DeSoto International, Inc.) to obtain the compositions of the binder coatings containing 5 wt.% up to 24 wt.% chlorinated polyolefins. The composition D866 is a mixture of solvents, formed from the composition of SOLVESSO 100 (35% (by vol.), xylene (10% (vol.)), isobutylacetate (22% vol.) and butyl acetate (35% (by vol.). On the panel for testing of aluminum 2024-T first was coated in polyurethane coatings SA 8000 and perform the curing at 48,9° (120° (F) within 6 hours or 7 days at 24°C (75°F). Polyurethane coatings gave the opportunity to hold on for at least 30 days at 24°C (75° (F) to provide wear surfaces. Polyurethane coatings are subjected to wear, then subjected to the treatment using the composition for cleaning based on the solvent of methyl ethyl ketone (MEK). The composition of the binder coatings containing 5 wt.% up to 24 wt.% chlorinated polyolefin according to the method of coating a dispersion of n is worn over processed polyurethane coatings, subjected to wear. The thickness of the dried film of the binder of the coating was in the range from 1.27 μm to 0.05 mils) up to 12.7 μm (0.5 to mils). After that, the binder of the coating was dried at 25°C for periods of time ranging from 20 minutes to 48 hours. Upon completion of the drying polyurethane top finishing coat of SA 8000 was applied over the bond coats based chlorinated polyolefin and received the top finishing coating, characterized by a dry film thickness in the range from 12.7 μm (0.5 to mils) to 101.6 microns (4 mils).

Test for adhesion in the dry state, the adhesion in the wet state and the resistance of rotating the farm to the effects of rain erosion was performed as described in this document. The results are presented in table 3.

Table 3
Binder coating containing chlorinated polyolefins
SampleExpressed in wt.% the levels of chlorinated polyolefinCleaning methodDrying time (hour)Adhesion in the dry state (BSS 7225)Adhesion in the wet state after 7 days (BSS 7225)
3A24%Composition for cleaning based on IEC 0,5Successfully passing testSuccessfully passing test
3B24%Composition for cleaning based on IEC0,3Successfully passing testSuccessfully passing test
3C24%Composition for cleaning based on IEC1Successfully passing testSuccessfully passing test
3D24%Composition for cleaning based on IEC4Successfully passing testSuccessfully passing test
3RD24%Composition for cleaning based on IEC2,5Successfully passing testSuccessfully passing test
3F20%Composition for cleaning based on IEC0,3Successfully passing testSuccessfully passing test
3G20%Composition for cleaning based on IEC1Successfully passing testSuccessfully passing test
3H20%The composition for about the Irka based on IEC 1Successfully passing testSuccessfully passing test
3I15%Composition for cleaning based on IEC0,3Successfully passing testSuccessfully passing test
3J15%Composition for cleaning based on IEC4Successfully passing testSuccessfully passing test
3K15%Composition for cleaning based on IEC4Successfully passing testSuccessfully passing test
3L10%Composition for cleaning based on IEC0,3Successfully passing testSuccessfully passing test
3M5%Composition for cleaning based on IEC0,3Successfully passing testSuccessfully passing test

Other embodiments of the present description should be obvious to a person skilled in the relevant field of technology after reading the description of the invention and the practice of the present description. It is assumed that opisaniemopyta and examples should be considered only as examples, thus the true scope and essence of the present description are provided in the next following claims.

1. Coating for use on surfaces exposed to wear, which is a composition comprising at least one curable polyurethane and at least one chlorinated polyolefin, which provides improved adhesion to the surface subjected to wear, in comparison with the adhesion of the coating composition containing the same, at least one curable polyurethane, but in the absence of at least one chlorinated polyolefin.

2. The coating according to claim 1, in which the quantity of at least one chlorinated polyolefin is in the range from 1 to 10 wt.% from the total mass of the solid phase coating.

3. The coating according to claim 1, in which the quantity of at least one chlorinated polyolefin is in the range from 2.5 to 5 wt.% when calculating the total mass of the solid phase coating.

4. The coating according to claim 1, in which at least one chlorinated polyolefin comprises grafted acrylic chlorinated polyolefin.

5. The coating according to claim 4, in which the number of grafted acrylic component in the grafted acrylic chlorinated polyolefin is in the range from 10 to 90 wt.% from the total mass of the grafted acrylic chlorinated p is diolefin.

6. The coating according to claim 4, in which the number of grafted acrylic component in the grafted acrylic chlorinated polyolefin is in the range from 30 to 60 wt.% from the total mass of the grafted acrylic chlorinated polyolefin.

7. The coating according to claim 1, in which the surface is subjected to wear, includes polyurethane coating, subjected to wear.

8. The coating according to claim 7, in which the polyurethane coating is subjected to wear, is located on the surface of aviation or aerospace aircraft.

9. The coating according to claim 1, in which the surface is subjected to wear, contains polyurethane.

10. The coating according to claim 1, in which the surface is subjected to wear and tear, mechanical cleaning is not subjected to.

11. The method of re-finishing the surface subjected to wear, including the application of curable polyurethane top finishes containing at least one chlorinated polyolefin on the surface subjected to wear, as claimed in claim 1, and curing curable polyurethane top finishes, in which before applying the curable polyurethane top finishes surface subjected to wear, not subjected to mechanical grinding.

12. The method according to claim 11, characterized in that the number of chlorineand the second polyolefin in curing polyurethane top finishing coating is in the range from 1 to 10 wt.% from the total mass of the solid phase-curable polyurethane top of finishes.

13. The method according to claim 11, characterized in that the amount of chlorinated polyolefin in curing polyurethane top finishing coating is in the range from 2.5 to 10 wt.% from the total mass of the solid phase-curable polyurethane top of finishes.

14. The method according to claim 11, characterized in that the subject re-finishing the surface subjected to wear, successfully passes the test for resistance of rotating the farm to the effects of rain erosion, corresponding to the description of the document BSS 7225.

15. The method according to claim 11, characterized in that at least one chlorinated polyolefin comprises grafted acrylic chlorinated polyolefin.

16. The method according to item 15, wherein the amount of grafted acrylic component in the grafted acrylic chlorinated polyolefin is in the range from 10 to 90 wt.% from the total mass of the grafted acrylic chlorinated polyolefin.

17. The method according to item 15, wherein the amount of grafted acrylic component in the grafted acrylic chlorinated polyolefin is in the range from 30 to 60 wt.% from the total mass of the grafted acrylic chlorinated polyolefin.

18. The method according to claim 11, characterized in that before applying the polyurethane top finishes surface subjected to wear, washed what rastvoritele, rubbing her.

19. The method according to claim 11, characterized in that the surface subjected to wear, includes polyurethane coating, subjected to wear.

20. The method according to claim 19, characterized in that the polyurethane coating is subjected to wear, is located on the surface of aviation or aerospace aircraft.

21. The method according to claim 11, characterized in that the surface subjected to wear, includes polyurethane.

22. The method of re-finishing the surface subjected to wear and tear, including

coating the surface subjected to wear, the binder coating containing at least one chlorinated polyolefin;

the drying of the binder coating;

drawing on binder coating curable polyurethane top finishes; and

curing curing polyurethane top of finishes.

23. The method according to item 22, wherein the binder coating is applied from a dispersion containing from 1 to 24 wt.%, at least one chlorinated polyolefin in the calculation on the total weight of the dispersion.

24. The method according to item 22, wherein the binder coating is applied from a dispersion containing from 5 to 10 wt.%, at least one chlorinated polyolefin.

25. The method according to item 22, characterized in that the woman dry film of the binder of the coating is in the range from 1.27 to 25.4 microns.

26. The method according to item 22, wherein the dry film thickness of the binder of the coating is in the range from 1.27 to 12.7 microns.

27. The method according to item 22, wherein prior to applying the binder coating the surface subjected to wear and tear, mechanical cleaning is not subjected to.

28. The method according to item 22, wherein the binder coating provides improved adhesion between the polyurethane upper decorative coating and the surface subjected to wear, in comparison with the adhesion between the same polyurethane upper decorative coating and the surface subjected to wear, in the absence of a binding cover.

29. The method according to item 22, wherein subjected to re-finishing the surface passes the test for resistance of rotating the farm to the effects of rain erosion, corresponding to the description of the document BSS 7225.

30. The method according to item 22, wherein the curable polyurethane top finishing coat is applied using a composition of two-component polyurethane coatings.

31. The method according to item 22, wherein the at least one chlorinated polyolefin comprises grafted acrylic chlorinated polyolefin.

32. The method according to item 22, wherein prior to applying the binder coating the surface subjected to wear, prom is live solvent, rubbing her.

33. The method according to item 22, wherein the surface is subjected to wear, includes polyurethane coating, subjected to wear.

34. The method according to item 23, wherein the surface is subjected to wear, contains polyurethane.

35. The method according to p, characterized in that the amount of grafted acrylic component in the grafted acrylic chlorinated polyolefin is in the range from 10 to 90 wt.% from the total mass of the grafted acrylic chlorinated polyolefin.

36. The method according to p, characterized in that the amount of grafted acrylic component in the grafted acrylic chlorinated polyolefin is in the range from 30 to 60 wt.% from the total mass of the grafted acrylic chlorinated polyolefin.

37. The method according to clause 34, wherein the polyurethane coating is subjected to wear, is located on the surface of aviation or aerospace aircraft.



 

Same patents:

FIELD: chemistry.

SUBSTANCE: scope of invention covers stabilized water dispersions of curing agent suitable for coating preparation. Dispersion dispersed in water contains the following components: A1) at least one organic polyisocyanate with isocyanate groups connected in aliphatic, cycloaliphatic, araliphatic and/or aromatic manner, A2) ionic or potentially ionic and/or non-ionic substance, A3) blocking agent, B) stabilizer containing a) at least one amine with structural element of common formula (I) without any hydrazide group, b) substance with formula (IV) .

EFFECT: resistance to thermal yellowing increases.

6 cl, 5 tbl, 11 ex

FIELD: technological processes.

SUBSTANCE: method of coating application onto non-polar base includes stages of applying primer that contains one or more non-polar polymers polyolefins with silane functional groups onto non-polar base, and then applying one or more layers of pigmented coating above the primer layer. The primer contains resin based on alkyl aromatics and non-polar polyolefin, which contains silane groups.

EFFECT: primer demonstrates proper adhesion on non-polar bases without reduction of chemical resistance.

14 cl, 1 tbl, 5 ex

FIELD: protecting covers.

SUBSTANCE: invention relates to dye-cover. Proposed dye-cover is prepared from composition comprising components taken in the following ratio, wt.-%: binding agent, 20-30; hollow microspheres, 10-30, and organic solvent, the balance. A binding agent is chosen from group comprising organosilicon resin, acrylic (co)polymer, polyurethane. Ceramic or glass hollow microspheres of size 20-150 mc are uses as hollow microspheres. The composition can comprise additionally titanium dioxide in the amount 2-5 wt.-% and antipyrene additive in the amount 5-25 wt.-%. Invention provides refractoriness, atmosphere resistance and exploitation period. The proposed dye-cover possesses heat-insulting, sound-insulating, waterproofing properties simultaneously and designated for protecting different equipment, pipelines, metallic, concrete, ferroconcrete, brick, wood and other building constructions for habitable, common knowledge and industrial buildings and constructions.

EFFECT: improved and valuable technical properties of dye-cover.

2 tbl, 9 ex

FIELD: compositions for coats.

SUBSTANCE: proposed composition includes heterocyclic silicon compound containing at least one alcohol-orthosilicate group and cross-linking agent interacting with hydroxylic groups. Proposed composition has low content of volatile organic solvents and is hardened at temperature of 5°C ; hardened composition contains no unreacted low-molecular blocking agents which are likely to evolve into surrounding atmosphere at hardening or during operation. Besides that, ratio of life to time to drying time is favorable. Proposed composition may be used for finishing and secondary finishing of automobiles and large transport facilities; it may be also used as an adhesive.

EFFECT: enhanced efficiency.

14 cl, 4 tbl

FIELD: thermo-setting heat-activated paint compositions, application of such composition on substrate.

SUBSTANCE: proposed composition contains at least one amorphous binder at Ts below 5C and/or at least one crystalline or semi-crystalline binder at melting point or interval of melting points below 150C, at least one epoxy resin, at least one polyamine including cyanamide groups, at least one blocked or latent catalyst in the amount of 0.5-5 mass-%; this catalyst is deblocked or activated at elevated temperature below hardening temperature of paint composition. Paint composition is characterized by Ts below 5C and viscosity below 2000 mPa·sec measured at temperature of 80C and shift rate of 10 c-1. The method of application of coat to substrate includes the following stages: first, paint composition is heated to temperature of application, then, composition is applied on substrate and paint thus applied is heated to temperature of its hardening till complete hardening. Paint composition is used for application onto mirror reverse surface, onto metal surface or onto substrate sensitive to heating. This composition forms thin anti-corrosive coat free from volatile organic compounds which may be used at temperature of application between 100 and 160C by employing the methods of application at low temperatures.

EFFECT: enhanced efficiency.

15 cl, 3 tbl, 9 ex

FIELD: chemical industry; other industries; production of the polymeric coatings on the substrates by the baking for cure.

SUBSTANCE: the invention is pertaining to the polymeric coatings produced on the substrates by the baking for cure. The technical result of the invention is development of the varnishes for the baking for cure, which are mainly detach the harmless products and make the solid coatings resistant to the action of the dissolvents. The invention presents the coatings produced on the substrates by the baking for cure of the mixture consisting of 1 mass share of styrene copolymer and the allyl alcohol treated with diisocynotams with the contents of the OH-group from 1 up to 10 %; 0.05-1 mass share of the oxalic acid; 0.2-5 mass share of the organic solvents and, if necessary, of pigments and the auxiliary components for the varnishes, at the temperatures from 120°С up to 250°С and durations of the baking for cure from 1 up to 200 minutes. The produced coatings have the high hardness and positive stability to the action of the dissolvents. At that during the baking for cure only the dissolvent and water are separated.

EFFECT: the invention ensures development of the varnishes for the baking for cure, which are mainly detach the harmless products and make the solid coatings resistant to the action of the dissolvents.

1 cl, 5 ex

FIELD: polymer materials.

SUBSTANCE: invention relates to moisture-hardenable polyurethane compositions, namely to those containing at least one polyurethane prepolymer with isocyanate groups obtained from at least one polyisocyanate and at least one polyol. In addition to prepolymer, composition further contains at least one polyaldimine prepared from at least one polyamine with primary aliphatic amino groups and at least one aldehyde of general formula: wherein Y1 and Y2, independently from each other, represent alkyl, aryl, or arylalkyl group, which is optionally substituted, may contains heteroatoms and/or unsaturated fragments, or Y1 and Y2 together form carbocyclic or heterocyclic ring, which is composed of 5-8, preferably 6 atoms and optionally contains one or two unsaturated bonds; and R1 represents either linear or branched C11-C30-alkyl chain, optionally with at least one heteroatom, especially with at least one ether oxygen atom, or linear or branched C11-C30-alkyl chain with one or numerous unsaturated bonds, or R1 represents group or in which R2 represents linear, branched, or cyclic hydrocarbon chain with 2-16 carbon atoms, optionally incorporating at least one heteroatom, especially at least one ether oxygen atom, or linear, branched, or cyclic C2-C16-hydrocarbon chain with one or numerous unsaturated bonds; and R3 represents linear, branched, or cyclic hydrocarbon chain with 1-8 carbon atoms. Invention describes methods for preparing such compositions and polyaldimine. Compositions can be used as glues, sealing formulations, coatings, or floorings hardening without unpleasant smell and suitable to seal layers inside buildings or to join structural members in vehicle interiors.

EFFECT: extended assortment of hardenable liquid polymer compositions.

24 cl, 4 tbl, 14 ex

FIELD: building materials.

SUBSTANCE: invention relates to a hardening composition used in building industry. The composition comprising a polymer with two or more thiol groups per a molecule, compound with two or more isocyanate groups per a molecule, carbon black and calcium carbonate involves additionally a filling agent wherein silicic acid or silicate is the main component or organic filling agent wherein ground powdered carbon as the main component. The composition shows satisfactory stability in storing the basic compound and the hardening capacity even after storing the basic compound and, except for, it forms the hardened join with sufficient rupture strength limit, hardness and properties of barrier for gas. The composition comprises a hydrocarbon plasticizer and an organometallic compound preferably that provides highly effective hardening properties in combination with higher mechanical strength and properties of barrier for gas. Proposed hardening composition can be used as sealing material in manufacturing isolating glasses, frames, windows for transportation means, glues and covers.

EFFECT: improved and valuable technical properties of composition.

9 cl, 12 tbl, 11 ex

FIELD: polymer materials.

SUBSTANCE: invention relates to polymer compositions including at least one polyurethane prepolymer A with isocyanate terminal groups obtained from at least one polyisocyanate with at least one polyol A1 and, if necessary, with at least one polyol A2. wherein A1 is linear polyoxyalkylenepolyol with unsaturation degree ,less than 0.04 m-equ/g; A2 is polyol, which is present in amount 0-30%, preferably 0-20%, in particular 0-10% based on total amount A1+A2; and at least one polyaldimine B. Composition is a mixture of polyurethane prepolymer A with polyaldimine B. In absence of moisture, such compositions are stable on storage. When being applied, such compositions are brought into contact with moisture, after which polyaldimines are hydrolyzed into aldehydes and polyamines, and polyamines react with polyurethane prepolymer containing isocyanate groups. Products obtained from such composition possess very wide spectrum of properties, including tensile strength varying within a range from 1 to 20 MPa and ultimate elongation above 1000%. Composition may be used as glue, hermetic, coating, or facing.

EFFECT: expanded possibilities of polyurethanes.

3 cl, 7 tbl, 34 ex

FIELD: composite materials.

SUBSTANCE: in particular, invention relates to employment of polyisocyanates compositions as binders for composites containing lignocellulose fibers such as oriented wood chipboard.

EFFECT: improved performance characteristics regarding detachment of product as compared to conventional polyisocyanates employed for binding lignocellulose material.

11 cl, 7 tbl, 8 ex

FIELD: wood-working industry, in particularly, means of impregnation of wood fallings with protective compositions.

SUBSTANCE: the wood is placed in the installation body near the electrode-radiation source, the impregnation liquid is sprayed for delivery to the wood, and an electromagnetic action is accomplished on it on the wood by single-pole electromagnetic pulses at a power of at least 1 MW, duration less than 1 NS and repetition frequency of at least 1 kgHz. The installation for wood impregnation has a body, electrode connected to the source of electromagnetic action and a vessel for the impregnation liquid, the electrode is positioned is the center of the body and serves as the radiation source, a device for spraying of the impregnation liquid is positioned in the upper part of the body, it represents a circular collector with nozzles connected through a pump to the vessel for the impregnation liquid. A grate-holder is positioned in the lower part of the body for vertical disposition of the wood between the body walls and the electrode-radiation source, and under the device for spraying of the impregnation liquid the body bottom is provided with an opening for rejection of the surplus impregnation liquid connected to the filter installed outside the body and through the second pump-to the vessel for the impregnation liquid, the source of electromagnetic action represents a generator of nanosecond pulses with a duration of less than 1 ns, power of at least 1 MW and repetition frequency of at least 1 kHz.

EFFECT: simplified method of wood impregnation and installation for its realization, provided a high quality of impregnation.

2 cl, 1 dwg

FIELD: chemical industry; other industries; methods of formation of the micropatterns on the polymeric film surfaces.

SUBSTANCE: invention is pertaining to the field of production of the polymeric films with the micropattern on their surfaces, which may be used, for example, in the capacity of the reflecting components, the components for the optoelectronic devices and the information display systems. The technical problem of this invention consists in simplification of the method of formation of the micropattern on the polymeric films surfaces. The indicated result is attained due to the fact, that at formation of the micropattern on the polymeric films surfaces by action on the film containing at least on one of its sides the coating made out of the substance more rigid, than the polymer of the film. In the capacity of the film use the biaxially oriented film, and the action includes sequential fixation of the film dimension at least in one arbitrarily selected direction and the annealing of the fixed film in the temperature interval from the temperature of its biaxial orientation up to the polymeric film melting point. The method also provides, that after annealing conduct removal of the coating from the film surface.

EFFECT: invention ensures simplification of the method of formation of the micropattern on the polymeric films surfaces.

2 cl, 3 dwg, 3 ex

FIELD: chemical industry; other industries; methods of formation of the microrelief pattern on surfaces of the polymeric films.

SUBSTANCE: invention is pertaining to the field of formation of the microrelief pattern on surfaces of the polymeric films, which may be used in the capacity of the reflecting components, the components of the optoelectronic devices and the information display systems. The technical problem of the invention consists in simplification of the method of formation of the microrelief on the polymeric films surfaces. The indicated result is attained by that at formation of the microrelief on the polymeric films surfaces deposit at least on one of the sides of the polymeric film the coating out of the material, which is more rigid, than the polymer of the film with the subsequent effect on the film. In the capacity of the film use the biaxially oriented film, and the effect on it includes the serial fixation of the film dimension at least in one arbitrary selected direction and the annealing of the fixed film in the temperature interval from the temperature of the biaxial orientation of the film up to the melting point of the film polymer. At that they after the annealing conduct removal of the coating from the film surface.

EFFECT: invention ensures simplification of the method of formation of the microrelief on the polymeric films surfaces.

2 dwg, 2 ex

FIELD: metallurgy industry; metal-rolling production; methods of application of the paint-and-lacquer coating on the metallic strips.

SUBSTANCE: the invention is pertaining to the metal rolling production and may be used in the sheet-rolling shops coating branches incorporating the aggregates of the polymeric coatings of the roll flat stock. The method of application of the paint-and-lacquer coating on the surface pf the metallic strip includes, at least, entrapment of the liquid paint-and-lacquer material by the catching roll rotating in the underpan with the enamel, transfer of the enamel layer from the catching roll onto the applying roll and the being stained surface of the strip, the continuous feeding of the liquid paint-and-lacquer material into the underpan. The distinctive feature of the method is the preliminary "settling", separation from the air bubbles, the foam bunches of the new fed batches of the paint-and-lacquer materials directly in the paint-and lacquer underpan without usage of the special containers. Entrapment of the new batch of the liquid paint-and-lacquer material by the catching roll is exercised from the special area of the liquid paint-and-lacquer material underpan - the entrapment area insulated from the foam infiltration in it. The liquid paint-and-lacquer material is fed into the entrapment area from the settling area with the subsequent its application on the surface of the applying roll and further - on the strip. The technical problem is being solved by the invention with the help of the mounted in the paint-and-lacquer material underpans of the special design baffles allowing to form on the surfaces of the catching and applying rolls and on the steel strips of the stable-continuous film of the liquid paint-and-lacquer material without the air bubbles, the bunches of the foam in its composition; to reduce the amount of the defected metal strips with the paint-and-lacquer coatings.

EFFECT: the invention allows to form on the surfaces of the catching and applying rolls and on the steel strips of the stable-continuous film of the liquid paint-and-lacquer material without the air bubbles, the bunches of the foam in its composition; to reduce the amount of the defected metal strips with the paint-and-lacquer coatings.

1 tab

FIELD: metal-working industry; other industries; methods of application of the paint-and-lacquer coating on the metallic strips.

SUBSTANCE: the invention is pertaining to the metal rolling production and may be used in the sheet-rolling shops coatings sections incorporating the aggregates for the polymer coatings of the rolled coiled stock. The method of application of the paint-and-lacquer coating on the painting surface of the strip includes at least entrapping of the liquid paint-and-lacquer material by the entrapping roll gyrating in the underpan with the enamel, transfer of the enamel layer from the entrapping roll onto the applying roll and on the painting surface of the strip a and the constant feeding of the paint-and-lacquer material into the underpan. Distinctiveness of the method is the preliminary filtration of the paint-and-lacquer material (PLM) before its feeding into the PLM underpan, and feeding of the new potion of the PLM under pressure into the depth of the enamel volume in the underpan in two mutually opposite directions concerning the middle of the strip in width in parallel to the zone of the entrapping of the enamel by the entrapping roll. The technical problem being solved by the invention consists in separation of the enamel fed into the underpan from foreign impurities, improvement of its movement and circulation in the paint-and-lacquer underpan with the purposes of the averaging of its properties along the width of the entrapping roll and reduction of the amount of the rejected cold-rolled strips at the expense of the defects of the surfaces of the paint-and-lacquer coatings.

EFFECT: the invention ensures separation of the enamel fed into the underpan from foreign impurities, improvement of its movement and circulation in the paint-and-lacquer underpan with the purposes of the averaging of its properties along the width of the entrapping roll, reduction of the amount of the rejected cold-rolled strips at the expense of the defects of the surfaces of the paint-and-lacquer coatings on the metal strips.

1 tbl

FIELD: ceramic industry; metallurgy industry; glass industry; other industries; production of the coating composition suitable for transfer of the films and the casting products.

SUBSTANCE: the invention is pertaining to the coating composition, which is suitable for usage with the wide range of the films and bases and may be used for the glass, ceramics, such as the ceramic tiles and the metals, such as the sheet metal, the metallic ropes and the sheet metal with the protecting coating, and also on the temperature-sensitive films and bases. The invention problem is provision of production of the coating compositions without of the volatile organic compounds or just with the low share of the volatile organic compounds. For this purpose in the method of deposition of the coatings on the base on the first stage the radiation-hardening coating composition is deposited on the base and-or on the film transparent for radiation. On the following stage the base and the film are compress together in such a manner that the coating composition becomes the layer between them. After that the coating composition is hardened by the irradiation through the film for production of the base with the coating. Then the transparent film is removed from the coated base. The coating composition, which has been deposited on the film and-or the base is the radiation-hardening water-containing coating composition or the mixture of the radiation-hardening resins. The technical result of the invention is provision of the possibility of production of the hardened coating of the long service life with the improved mechanical properties.

EFFECT: the invention ensures the possibility of production of the hardened coating with the long service life and the improved mechanical properties.

11 cl, 3 tbl, 11 ex

FIELD: ceramic industry; metallurgy industry; glass industry; other industries; production of the heat-seal coating composition suitable for transfer of the films and the casting products.

SUBSTANCE: the invention is pertaining to the coating composition, which is suitable for usage with the wide range of the films and bases and may be used for the glass, ceramics, such as the ceramic tiles and the metals, such as the sheet metal, the metallic ropes and the sheet metal with the protecting coating, and also on the temperature-sensitive films and bases. The invention problem is provision of production of the coating compositions without of the volatile organic compounds or just with the low share of the volatile organic compounds. For this purpose in the method of deposition of the coatings on the base on the first stage the radiation-hardening coating composition is deposited on the base and-or on the film transparent for radiation. On the following stage the base and the film are compress together in such a manner that the coating composition becomes the interlayer between them. After that the coating composition is hardened by the irradiation through the film for production of the base with the coating. Then the transparent film is removed from the coated base. The coating composition, which has been deposited on the film and-or the base is the heat-seal coating composition containing from 20 up to 100 mass % of the radiation-hardening resin or the mixture of the radiation-hardening resins having the viscosity - in the interval from 15 up to 10000 mPa·s in the field of the temperatures from 40 up to 150°C. The technical result of the invention is provision of the possibility of production of the hardened coating of the long service life with the improved mechanical properties.

EFFECT: the invention ensures the possibility of production of the hardened coating with the long service life and the improved mechanical properties.

11 cl, 1 tbl, 7 ex

FIELD: apparatuses for applying coatings on inner surfaces of tubes, for example at restoration, insulation of main and technological pipelines in chemical, gas-oil industry branches.

SUBSTANCE: apparatus for application of insulation coating on inner surface of tube includes outer cylindrical housing having sections where electromagnets with positive charge are arranged. Cylindrical tool is arranged inside tube and it is embraced by winding that also has constant positive charge. Cylindrical tool includes reservoir with liquid insulation coating; heat resistant bag placed along cylindrical tool; heating member in the form of electric heater placed along shell of reservoir; compressed air bottle connected with heat resistant bag through non-return valve; power supply cell for heating member and distributing device in the form of two mutually parallel nozzles. Outer cylindrical housing is provided with rollers for moving along tube surface. Bottle with compressed air is arranged inside heat resistant bag and it is secured to wall of reservoir by means of threaded joint. At supplying power to electromagnets of outer cylindrical housing and to winding of cylindrical tool, inside tube due to action of generated magnetic field said cylindrical tool appears to be floated. Properties of generated magnetic field provide possibility for rotation of cylindrical tool along its own axis at desired revolution number. Heating member provides liquid state of insulation coating. As reservoir is subjected to action of excess pressure, after opening nozzles liquid insulation coating is applied on inner surface of tube. When pressure lowers in heat resistant bag air is automatically supplied into it through non-return valve. At cutting-off power of one of electromagnets of outer cylindrical housing, electromagnetic field in respective region is weakened and it causes shifting of cylindrical tool relative to center of tube axis.

EFFECT: enlarged functional possibilities of known methods and apparatuses for applying coating on inner surface of tubes.

2 cl, 2 dwg

FIELD: protective coatings.

SUBSTANCE: invention relates to undercoat for metallic substrates designed for manufacturing articles and for applying top coating layers. Undercoat comprises silicate binder containing aqueous silica sol having SiO2/M2O molar ratio at least 25:1, wherein M represents sum of alkali metal ions and ammonium ion, silica particles having average size above 10 nm. Binder may further contain insignificant amount of alkali metal silicate. Content of solids in undercoat ranges between 20 and 40% (v/v) and volume ratio of pigment concentration to critic concentration thereof is below 1. Undercoat contains following proportions of components aqueous silicate sol as binder having SiO2/M2O molar ratio at least 25:1 and pH value between 9.5 and 11, wherein M represents sum of alkali metal ions and ammonium ion and silica particles are optionally modified with aluminum oxide and have average diameter 10-16 nm; 10-55% zinc and/or zinc alloy powder based on the weight of dry film having average particle size between 2 and 12 μm; 0-35% organic resin based on the weight of dry binder; and 0-30% organosilicon finishing material. Coating may contain zinc-free pigment(s) and filler increasing storage life time of undercoat. Method of applying undercoat onto steel substrate comprises preparing undercoat using silica sol, whose pH is adjusted to 9.5-11, and depositing undercoat onto steel substrate.

EFFECT: increased hardness and wear resistance, and enabled deposition of corrosion-resistant coating without blistering.

15 cl, 10 tbl, 14 ex

FIELD: mechanical engineering.

SUBSTANCE: method comprises setting the reflecting member in the opening in front of the nozzle of the spraying burner and rotating the member in the course of coating. The reflecting member has sloping surface. The nozzle and reflecting member move one with respect to the other in a given trajectory. The axis of the nozzle is shifted with respect to the axis of rotation of the reflecting member. The reflecting member is additionally cooled by means of one or several nozzles arranged in the vicinity of the spraying nozzle. The exhaust gas is forcedly evacuated from the side of the nozzle opposite to the opening. The reflecting member vibrates within the ultrasonic frequency range. During coating, the part to be coated rotates around the axis of symmetry of the opening.

EFFECT: enhanced quality of coating and prolonged service life of the reflecting member.

7 cl, 3 dwg

FIELD: paint and vanish application on building and building structure wall surfaces with the use of painting apparatus to create pattern based on previously created digital pattern model superimposed with digital object, which simulates real object surface.

SUBSTANCE: method involves moving painting apparatus over object surface along with touching the surface with painting apparatus; continuously measuring or calculating device coordinates due to movement pickup usage; applying paint in compliance with said performance in dependence of determined coordinates; automatically stopping paint application if coordinate determination is not sufficiently precise relatively to predetermined admissible coordinate variation threshold or if paint or varnish have been previously applied on painted members defined by coordinate areas.

EFFECT: increased speed and reliability of pattern creation on any object surface, possibility to use digital pattern models.

14 cl, 18 dwg

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