Powder coating composition for coating pipes

FIELD: chemistry.

SUBSTANCE: composition contains a homogeneous mixture consisting of at least one bromine-functionalised epoxy resin, at least one epoxy curing agent and at least one pigment, filler and/or coating additive. Content of bromine in the bromine-functionalised epoxy resin is equal to 5-60%. The composition also contains alkanol amine and at least one zinc borate compound. Alkanol amine is selected from a group consisting of diethanol amine and tris(hydroxymethyl)aminomethane. The method of preparing the composition involves mixing components, heating to melting point of the mixture, extrusion of the molten mixture, cooling, crushing and grinding to powder. The composition provides a coating with high glass transition temperature and acceptable flexibility when depositing the coating onto a metallic or plastic base, in particular metallic and plastic pipes.

EFFECT: coatings can have high adhesion in hot and humid conditions and optimum short-term and long-term protection from cathodic disbonding at high temperature and humidity.

14 cl, 3 tbl, 7 ex

 

The technical field to which the invention relates

The present invention relates to compositions of epoxy powder coating for use in coating of pipelines having a glass transition temperature above 120°C, which provides the appropriate flexibility of the coating, as well as improved adhesion to the base in hot and humid conditions.

Description of the prior art

Epoxy resins are well known as a binder resin in the preparation of powder coatings, see D. A. Bate, The Science of Powder Coatings, vol. 1, 1990, pages 23-38.

Generally, the adhesion of the opaque epoxy powder compositions to the base is sufficient, and it has been enhanced in the past. US 4678712 and US 4330644, where disclosed a variety of opaque epoxy powder composition for coating of valves and pipes, which previously subjected to reaction with hydroxylamine to improve adhesion.

Epoxy powder coatings have also been used previously for gas and oil pipelines to prevent corrosion and to facilitate cathodic protection of pipes. Cathodic protection is another means to prevent corrosion of metallic materials containing iron, such as steel, in wet conditions, containing electrolyte, i.e. sea water and saline solutions. In General, cathodic protection prevents dissolved the e metal material, containing iron, by maintaining the material as a cathode and the slow ionization of iron contained therein. Unfortunately, you may experience the destruction and loss of adhesion of the organic coating on the cathode.

To reduce the cathode destruction, in JP-A59-222275 offer the use of the method of chromate or zinc-rich primer coating special epoxy thermosetting resin, and JP-A55-142063 provides the use of compositions consisting of polyvinylbutyral resins, liquid epoxy resins, compounds of borate cross-linking agent epoxysilane and phosphoric acid as a pretreatment composition for curing when heated. In EP-A-0 588 318 is mentioned a method of providing cathodic protection, which includes the use of pre-treatment steel with use of a thermosetting epoxy resin based powder coating containing from 5% to 75 wt.% compounds of zinc, with a further polarization of the coated steel material as the cathode.

In the US 20040211678 disclosed cathode composition for protection against corrosion, comprising the borate zinc, which improves the resistance of the cathode destruction. In the US 20050075430 describes the composition is curable epoxy powder coating, including aliphatic amerosport. These coatings provide improved adhesion base in hot and humid conditions and, in addition, they can be used to give the floor a high cathodic corrosion protection. In the US 4853297 mentioned liquid compositions based on epoxy resins, including bronirovannui epoxy resin for coating on a metal pipe.

However, most epoxy powder coating for pipes have a glass transition temperature (Tg) of about 110°C after curing. If the coating is exposed to high temperatures, higher than Tg, the coating becomes soft and loses its adhesion to the base in dry or wet conditions, it is a common disadvantage of prior art coatings for pipes. Therefore, in the pipeline industry there is a need for high AP when welding, which will be used in high temperature environments. Meanwhile, modern technology can produce products with high Tg, but they do not offer the necessary level of flexibility and adhesion to steel required by industries and pipeline industry. Accordingly, a need exists for compositions of powder coatings, as well as in the method of their application, which provide a high glass transition temperature with acceptable flexibility of the coating, along with the optimal short-term and long-term high temperature and cathodic protection failure at high humidity, and with the high adhesion to the base.

The invention

The present invention provides a composition epoxy powder coating comprising a homogeneous mixture consisting of

(A) 5 to 99 wt.%, at least one functionalized bromine epoxy resin with a bromine content of from 5 to 60%, based on component (A)

(B) 0.5 to 40 wt.%, at least one epoxy curing agent, and

(C) 0.01 to 55 wt.%, at least one pigment, filler and/or coating additives,

wt.%, based on the total weight of the powder coating composition and the amount of the components by weight is 100 wt.%.

The powder coating composition of the present invention provides a coating with a high glass transition temperature and acceptable flexibility in the coating on a metal or plastic base, in particular metal and plastic pipes. Coverage can be improved adhesion in hot and humid conditions, as well as the optimal short-term and long-term protection from the cathode of the damage from humidity and high temperature.

Coatings made in accordance with the present invention can also exhibit excellent adhesion when used on metal surfaces that have been subjected to less than ideal surface preparation. Such surface is ti include, for example, the steel surface, which was subjected to blasting, but not the acid-treated, steel surface, which was preheated to a lower than normal temperature application (the temperature of the substrate before applying the powder composition), and the steel surface, which was cleaned, but chemically not pre-processed.

Covering compositions of the present invention can not only show improved adhesion, but also improved adhesion can be realized at lower temperatures of application, than the temperature of the coating compositions, powder coating, available now, which can be considered as having good adhesion. Indeed, a good adhesion can be obtained by using the coverts of the composition at temperatures of more than 230°C (446°F), for example, in the case of a pre-heated substrates. In the coverts of the composition of the present invention can provide significant energy savings and, consequently, value.

Detailed description of the invention

Features and advantages of the present invention will be more easily understood by the average expert after reading the detailed description. It should be clear that these certain features of the invention, which, for clarity, described above and the lower is in the context of separate embodiments, can also be provided in combination in a single embodiment. Conversely, various features of the invention, which, for brevity, described in the context of a single variant implementation, can also be provided separately or in any podnominatsii. In addition, references in the singular may also include the plural (for example, "a" and "an" may refer to one, or one or more), unless the context specifically States otherwise.

Small changes above and below the ranges of numerical values can be used to achieve essentially the same results as values within the ranges. In addition, the disclosure of these ranges is intended as a continuous range including every value between the minimum and maximum values.

All patents, patent applications and publications mentioned herein are incorporated by reference in full.

The present invention relates to a powder coating composition, comprising from 5 to 99 wt.%, at least one functionalized bromine epoxy resin and an effective amount of an epoxy curing agent for curing the composition in accordance with the invention. The present invention provides the coating with a glass transition temperature higher than 120°C, with acceptable killed the spine of the cover, especially on metal and plastic pipes.

Functionalityand bromine epoxy resin, which can be used in accordance with the present invention include any epoxy resin or mixtures thereof, which are well known to a person skilled in the art and which can be functionalized by bromine. Bromine content in the epoxy resin is preferably in the range of from 5 to 60%, particularly preferably in the range of 20-55%, based on component (A).

Examples of such resins include brominated epoksipolyurethane phenolic Novolac resin, brominated epoksipolyurethane crenoline Novolac resin, epichlorhydrin epoxy resin, brominated diglycidyl esters of 4,4-(bishydroxyethyl)alkanes or a mixture. Preferably, the epoxy resin is bronirovannui epoxy resin bisphenol a/epichlorhydrin.

Brominated phenol Novolac epoxy functional resin of the present invention can be obtained by the interaction of brominated phenol Novolac resin with epichlorohydrin, or by the interaction of brominated phenol Novolac resins mixed with phenolic Novolac resin with epichlorohydrin. In some cases, such an epoxy phenolic Novolac resin is mixed with the standard is time epoxy resin, bisphenol-a or bronirovannymi standard epoxy resins bisphenol-A. Average expert in the art are well known commercially available resins that may be used in accordance with the invention.

Brominated crenoline Novolac epoxy functional resin of the present invention can be obtained by the interaction bronirovannoj Krasilovka Novolac resin with epichlorohydrin or interaction bronirovannoj Krasilovka Novolac resin mixed with Krasilovka Novolac resin with epichlorohydrin. Average expert in the art are well known commercially available resins that may be used in accordance with the invention.

Brominated epoxy functional resin type bisphenol a/epichlorohydrin present invention can be obtained by the interaction of the brominated bisphenol-A with epichlorohydrin, or by the interaction of the brominated bisphenol-A in a mixture of bisphenol a with epichlorohydrin. Average expert in the art are well known commercially available resins that may be used in accordance with the invention. For example, brominated epoxy functional resin bisphenol a/epichlorohydrin sold under the trademark EPON® from Hexion Specialty Chemicals, such as EPON® 1163 and EPON® 1183, EPOKUKDO® from KUKDO Chemical CO., LTD, such as EPOKUKDO® YDB-400H, YDB-406, YDB-408, YDB412, KB-560, YDB-416, KB-562P and KB-63P, Aradite® from Huntsman International LLC, such as Aradite 8049; D.E.R.™ from Dow Chemical Co., such as DER and DER 542 5 560. Nan-Ya® Anwin Enterprises Co., Ltd, such as Nan-Ya® NPEB-340, NPEB-400, NPEB-408, NPEB-450, NPEB-460, NPEB-530H.

Preferably, the cover composition of the present invention contains from 5 to 99 wt.%, preferably from 25 to 80 wt.%, most preferably 40 to 70 wt.%, calculated on the total weight of the covering songs from bronirovannoj epoxy resin, or mixtures thereof. Functionalized bromine epoxy resin may be partially replaced dibromononane apoximately or more resins, such as, for example, diglycidyl ethers of bisphenol a, epoxy Novolac and other resins containing epoxy groups, polyester resin, methacrylic resin, polysiloxane resin, urethane resin and/or modified copolymers in amounts in the range from 0 to 94 wt.%, calculated on the total weight of the powder coating composition, and, optionally, a curing agent for crosslinking these additional resins.

Thermoplastic polymers used in the compositions of the present invention, may include, but are not limited to, a compound based on Acrylonitrile/butadiene, which is available, for example, as Zealloy® 1411 from Zeon Chemical, for example, in the range from 0.1 to 5 wt.%, calculated on the total weight of the composition of the powder coating.

Curing agent for epoxide what's resins, or mixtures thereof, which can be used in accordance with the present invention include, but are not limited to, amines such as aromatic amines; acid anhydrides; acid; aromatic acids; mercaptans; phenolic resins; accelerated and/or modified dicyandiamide with additional reactivity and autocatalytic activity in the polyaddition reaction between the epoxy groups and their derivatives; imidazoles; imidazole adducts; hydrazide etc. Preferably, the curing agent for epoxy resins is dicyandiamide curing compound or phenolic curing compound or their mixture. More preferably, the curing agent for epoxy resin is a hardening aminosidine.

Average expert in the art are well known commercially available curing agents that may be used in accordance with the invention. For example, various adducts of amines sold under the trademarks UNMIDE® from Sanwa Chemical Industry Co. Ltd., DYHARD® 100S from Degussa and EPICURE™ from Resolution Performance Products, LLC;

various acid anhydrides, sold under the trademark RIKASHIDE from New Japan Chemical Co., Ltd.; various phenols sold under the trademark DURITE® from Borden Chemical Co., Aradur ® 9690 from Huntsman Advanced Materials Americas Inc., and called D.E.H. is from Dow Chemical Company.

Hardening agent included in the covering composition of the present invention in an amount effective for curing the coating. Preferably, the cover composition contains 0.5 to 40 wt.%, more preferably 1.5 to 20 wt.%, most preferably 1.5 to 6.0 wt.%, calculated on the total weight of the covering composition, curing agent, or mixtures thereof.

The ratio of curing agent to the components of the reactive resin covering the composition is preferably from 0.5 to 1.2):1,0, more preferably from 0.7 to 0.9):1.0, with the expression as an equivalent ratio of the reactive group of the curing agent and epoxy functional groups capable of reaction with a reactive group of the curing agent.

Covering compositions of the present invention can include one or more pigments, fillers and/or other coating additives, including, but not limited to, dyes, fillers, streaming control agents, dispersing agents, thickeners, amplifiers adhesion, antioxidants, light stabilizers, curing catalysts, anti-corrosion agents, and mixtures thereof.

Covering the composition according to the present invention contains from 0.01 to 55 wt.%, preferably from 5 to 35 wt.%, calculated on the total weight of the composition powder coatings, pigments, fillers, covering additives or mixtures thereof.

Fillers, and is used in the present invention, include, without limitation listed, titanium dioxide, iron oxide, aluminum, bronze, phtalocyanine blue, phtalocyanine green and mixtures thereof. The fillers used in the present invention include, without limitation listed, talc, aluminum oxide, calcium oxide, calcium silicate, metachromatically calcium, barium sulfate, aluminium silicate, barytes, mica, silica and mixtures thereof.

Streaming control agents and thickeners based on, for example, the modified bentonites or silica.

Anti-corrosion agents include, but without limitation specified, anticorrosion pigments, such as phosphate-containing pigments; and other organic or inorganic corrosion inhibitors, such as, for example, salts nitroisophthalic acid ester of phosphoric acid, amines and substituted benzotriazole.

Catalysts suitable for use in the present invention include those that are able to influence the reaction between the epoxy groups of the epoxy resin, the hydrogen atoms in the amino groups amidofunctional curing agents, phenolic hydroxyl groups of phenolic compounds, and homopolymerization epoxy resin. These catalysts include, but are not limited to, onevia compounds; imidazoles; imidazoline; and tertiary amines and phosphines. Preferably used in the range of the catalyst is a solid at room temperature, and is selected from imidazoles and solid phosphines. The catalyst is included in the covering composition of the present invention in amounts effective to initiate curing of the coating, as is well known to the average person skilled in the art. The average person skilled in the art will also understand that some curing agents, such as Epicure™ Curing Agent P-101 from Resolution Performance Products, LLC can act as a curing agent, and as a catalyst.

The powder coating composition in accordance with the invention may additionally contain from 0.02 to 6 wt.%, calculated on the total weight of the powder coating composition, of at least one aliphatic amerosport, as component (D). Thus, this invention relates to a powder coating composition providing a coating with good adhesion in hot and humid conditions and improved resistance to cathodic destruction for short-term exposure to high temperature and humid conditions.

Aliphatic amerosport, which can be used in accordance with the present invention, includes, but is not limited to, alcohols of the following formula:

where R1is a linear or branched alkyl group from 1 to 10 carbon atoms, preferably from 2 to 8 atoms of plastics technology : turning & the Yes, and more preferably from 2 to 4 carbon atoms, which contains at least one primary hydroxyl group; and

where R1is a linear or branched alkyl group from 1 to 10 carbon atoms, preferably from 2 to 8 carbon atoms, and more preferably from 2 to 4 carbon atoms, which contains at least one primary hydroxyl group, and R2is a linear or branched alkyl group from 1 to 10 carbon atoms, preferably from 2 to 8 carbon atoms, and more preferably from 2 to 4 carbon atoms, which contains at least one primary hydroxyl group.

Aliphatic amerosport, which can be used in accordance with the present invention, may be either in liquid or in solid form. The average expert in the art is familiar with methods that can be used to include liquid aliphatic amerosport in the powder mixture. For example, to add a liquid aliphatic amerosport in the mixture of the powder coating of the present invention, liquid aliphatic aminoplast can be absorbed with an inert carrier such as silica.

Preferably, aliphatic amerosport of the present invention includes, but without limitation specified of diethanol the ins, ethanolamines, 2-amino-1-butanol, 2-amino-2-methyl-1-propanol, 2-amino-2-ethyl-1,3-PROPANEDIOL, Tris(hydroxymethyl)aminomethane, 2-amino-2-methyl-1,3-propandiol, monomethylamine ataneli, isopropylaminocarbonyl, tert-butylaminoethyl, ethylaminoethanol, n-butylaminoethyl, isopropanolamine, diisopropanolamine and mixtures thereof. Preferred are diethanolamine, Tris (hydroxymethyl)aminomethane, as, for example, available under the trademark TRIS AMINO® from Dow Chemical Co. and Diethanolamine from Aldrich Chemical Co., and mixtures thereof.

Preferably, the cover composition of the present invention contains from 0.1 to 3.0 wt.%, more preferably from 0.1 to 0.5 wt.%, calculated on the total weight of the covering composition, aliphatic amerosport or mixtures thereof.

The powder coating composition in accordance with the present invention may contain from 0.5 to 5 wt.%, calculated on the total weight of the powder coating composition, of at least one borate compound. Thus, this invention relates also to the composition of the powder coating that provides resistance to cathodic destruction, under very long-term long-term high temperature and humid conditions, so that the adhesion of the composition epoxy powder coating of the present invention to the base improves.

Zinc-borate compound applicable in the accordance with the present invention, includes, but is not limited to, compounds of the following formula: [Zn(BO2)2], [ZnB4O7·2ZnO], [2ZnO·3V2About3·3,5H2On] or mixtures thereof. Preferably the zinc-borate compound is a compound [2ZnO·3V2O3·3,5H2O], for example, "Borogard® ZB fine", available from U.S. Borax, Inc.

The zinc borate can be prepared by melting of a mixed source material of zinc oxide and boric acid or double decomposition of the mixed source material.

Preferably, the cover composition contains from 0.5 to 4.75 wt.% connection - borate zinc, more preferably from 0.5 to 4.0 wt.%, most preferably from 1.5 to 2.5 wt.%, calculated on the total weight of the composition of the powder coating.

The components of the present invention are mixed, ekstragiruyut and crushed the conventional methods used in the field of powder coatings, familiar to the average person skilled in the art. The only restriction is that aliphatic amerosport when it is included in the compositions according to the invention, does not interact with the curing agent or with the epoxy resin prior to mixing with any of the additional components of the powder coating. Additionally, a preliminary mixture of aliphatic amerosport with other components of the powder coating believes is acceptable I, if only the aliphatic aminopyrido not allow you to interact with any of the components that are pre-mixed aliphatic amerosport.

Typically, all components of the composition of this powder coating is added to the mixing container and mixed together. The mixed mixture was then melted, for example, melting in the extruder. Extruded composition is then cooled and cut up into pieces and grind into powder. The milled powder is subsequently sorted by size to achieve the desired particle size, for example an average particle size of from 20 to 200 microns.

In the preparation of the borate zinc contained in the powder coating composition of the present invention, a predetermined quantity of compounds of zinc borate can be added, for example, to the epoxy resin and the additional components of the compositions according to the invention, and then mixed. The premix is then ekstragiruyut, cooled and thereafter pulverized and classified.

The composition according to the invention can also be prepared by sputtering from a supercritical solution through a process NAD (“non-aqueous dispersion”) or the process of atomization by ultrasonic standing wave.

In addition, certain components of the powder coating composition according to the invention, for example to the where it is refuelled, pigments, fillers, can be recycled with the finished particles of the powder coating after extrusion and grinding through a process of “linking” using technology coilcoating. For this purpose, the individual components can be mixed with particles of the powder coating. During mixing of the individual particles of the powder coating is treated to reduce its surface, so that the components are glued to them and homogeneity are connected with the surface of the particles of the powder coating. Softening the surface of the powder particles can be done by thermal treatment of the particles to a temperature, for example of glass transition temperature Tg of the composition in the range of, for example, from 50 to 110°C (122 to 230°F). After cooling, a mixture of particles of the desired size of the resulting particles can be obtained by sifting process.

The powder coating composition of the present invention can be easily applied to metallic and non-metallic bases that were or were not preheated. The composition of the present invention may be used to cover the metal bases, including, but not limited to steel, brass, aluminum, chromium and mixtures thereof. Examples are the pipelines, for example, internal and/or external surfaces of steel pipes, structural steel, used Abetone and marine environments storage tanks, valves and pipes of oil production and plating. Preferably, the coated structural steel is a pipeline. The composition of the present invention can also be used to cover the iron-containing metallic material, such as steel, when such materials are subjected to the method of cathodic protection in accordance with the present invention.

The powder coating composition in accordance with the present invention can be applied also to the surface of the base, which is less than ideally prepared, including, for example, steel surfaces that have been subjected to blasting, but not treated with acid, preheated to a lower than normal temperature application, or refined, but not chemically processed. In addition, a good adhesive properties of this invention allow coverts compositions to stay on oily and covered with scum surfaces such as found on a steel hull and other minimally pure metal materials.

Depending on requirements-based coating, the surface of the base may be subjected to mechanical processing such as destruction, following which, in the case of the metal bases, should the acid washing or cleaning with subsequent the overall chemical processing.

The powder coating composition of the present invention may be applied by, for example, electrostatic spraying, electrostatic cleaning, thermal or flame spraying, coating methods in psevdoozhizhenom layer, coating, applying tribostatic spray and the like, as well as methods of coating spiral, all of which are known to a person skilled in the technical field.

To use opaque compositions of the invention, the base can be primed, but not pre-heated, so that the base was at an ambient temperature of about 25°C (77°F).

In some applications the application surface may be preheated prior to application of the powder composition, and then either subjected to heating after applying the powder composition or not. For example, for different stages of heating is commonly used gas, but also other known methods, such as induction heating, microwave, infrared (IR), near infrared (NIR) and/or ultraviolet (UV) radiation.

Coverts composition of the present invention may, for example, be applied to the base, preheated to a temperature in the range from 170 to 260°C (338 up to 500°F), using means well known to the average expert in the field those who Nicky. The pre-heated base can then be, for example, immersed in a fluidized bed containing the powder coating composition of the present invention. The composition is applied in the form of a coating on the base, then cured, for example, using the means and conditions mentioned below.

The coating can then be overiden or overiden further the influence of convection, gas and/or heat radiation, such as IR and/or NIR radiation, as is known from the prior art, at temperatures, for example 100°C-300°C (212-572°F), preferably 160°C-280°C (320-554°F), as the final temperature in each case, within, for example, 2-10 minutes in the case of preheated grounds and, for example, 4-30 minutes in the case of pre not hot substrates. The powder coating composition may also be cooled by radiation of high energy, well-known specialist. UV-irradiation or elektronno-beam irradiation can be used as high energy emission. The irradiation may be conducted continuously or intermittently.

If the composition in accordance with the present invention is used in conjunction with unsaturated resins and, optionally, photoinitiators or with unsaturated resin containing powders, can be used dual curing. Double hotwired the means of the method of curing the powder coating composition in accordance with the invention, where the applied composition can be overiden, for example, as the high energy radiation, such as UV irradiation and thermal methods of curing known to the expert.

After curing the coating of the base, as a rule, subjected to, for example, either air cooling or water cooling to reduce the temperature, for example, to between 35 and 90°C (95 and 194°F).

The base is covered with an effective amount of the present composition of the powder coating, so as to obtain a dry film thickness in the range of, for example, from 25 to 750 microns (1-30 mils), preferably from 50 to 450 μm (2-18 mil), from 50 to 125 microns (2-5 mils) for thin-film coatings and from 150 to 450 microns (from 6 to 18 mil) thick film functional coatings. When it is expected that, for example, a single layer coating of the pipe is subsequently protected by cathodic protection, covering the composition of the present invention is applied so as to obtain a coating having a thickness of, for example, from 250 to 450 microns (10 to 18 mil).

The powder coating composition in accordance with the invention can be applied directly on the surface of the substrate as a primer coating or primer layer, which may be a primer on the basis of liquid or powder. Composition of powder coatings in accordance with the invention can also be applied to the operation of the coating layer of the multilayer coating system based on liquid or powder coatings, for example, on the basis of powder or liquid transparent layer coatings applied to give the color and/or add special effect base coat layer or a pigmented one-layer powder, or liquid finishing coat applied to the previous application.

For example, the adhesive and/or a heavy-duty protective film, such as, for example, polyethylene lining, a polyolefin, a heavy-duty protective urethane cover composition, opaque composition based on epoxy resin, and the like, and/or finishing layer, such as a color layer or a different song epoxy powder coating can be applied over the opaque composition of the present invention. An adhesive, such as adhesive Fusabond® from DuPont, can be used to connect the protective film coated with epoxy resin. Different available adhesives, protective film and finishing layers well known to the average person skilled in the technical field.

In the case of the Foundation, with corrode the metal surface is coated with the coating composition of the powder coating of the present invention, and then the substrate may be polarized as a cathode.

The present invention is further described in the following examples. It should be understood that these examples are given for illustration purposes only. From viseisei the frame the discussion and these examples, the average expert in the art can determine the main characteristics of this invention and, without departing from its nature and scope, can make various changes and modifications of the invention to adapt it to different conditions of use. As a result, the present invention is not limited to the illustrative examples set forth herein below, but is determined by the formula given below.

EXAMPLES

Test procedure

Cathode destruction (CD) test procedure

The following test procedure cathode destruction was used to obtain data presented in Table 12, the steel panel (4x4x1/4") were first subjected to blasting with obtaining a profile from 3 to 4 mil, then, in addition, were treated by washing with phosphoric acid and then treated with deionized water. The panels were then coated with the composition prepared in accordance with Examples more clearly described below, the film thickness of from 200 to 300 microns (8 to 12 mil).

Each coating was applied by preheating the corresponding panel to a temperature in the range from 204 to 232°C (400 to 450°F) and then dip the hot bar in the fluidized bed to achieve a thickness of 200 to 300 microns (8 to 12 mil), mostly 250 μm. After suitable subsequent otherid is ment to achieve full cure, controlled by the method of differential scanning calometry (DSC), panel tempered in water.

The hole diameter of 3 mm (defined as "pass") then drilled through the center of each coated test panel and a cylinder with a diameter of 3.5 inches tightly secured. The cylinder is then filled with 3% NaCl solution, and immersed in a solution of a platinum wire. All this design "toolbar-cylinder was then placed in an oven at a temperature of 95°C (203°F), and the voltage 1.5V (measured in solution calomel electrode) was applied to the platinum wire and the test panel within 28 days. At the end of each period of the test panel was removed from the furnace, the NaCl solution was poured from the cylinder and the cylinder was separated from the panel.

After removal of the cylinder did 8 radial incisions in the side from a gap in the side of the cover inside the cylinder, which was in contact with the floor NaCl, and the panel was left for one hour to cool to room temperature. The coating was then removed with a knife, working from the edge of the pass using the lever. The destruction from the centre pass to the edge of the field of fracture was measured and then averaged. This method follows the instructions in the TransCanada Pipeline spec. TESCOAT FBE Rev.O, which is based on CSA Z245.20-98.

Test procedure adhesion when watered

The following procedure tests the wetting water was used is implemented in the forming data, presented in Table 2. The panel cover in accordance with the procedure described above, were placed in a 95°C (203°F) bath with deionized water at a level sufficient for full immersion coating of a prototype. After 14 or 28 days, remove the test panel. While the test specimen was still warm, used a knife with multiple blades for marking 30x15 mm rectangles through the coating to the base. Air cooled block to ambient temperature for at least one hour after removal from the bath. Before the test floor was partitioned into rectangles, ensuring that the cutter has reached the metal base. Put the knife under the floor in the corner of the grid rectangle and used the action of the lever to remove the coating. Continued action of the knife and raised floor lever up until either all the floor in the rectangle was not removed, or the coating did not show some resistance. Evaluated the adhesion of the coating in accordance with CSA Z245.20-98.

Test procedure for flexibility

The following procedure tests the flexibility used to obtain data presented in Table 2. Bars 3/8"x1"x7,75" c profile from 63 to 100 microns (2.5 to about 4.0 mil), covered by the same procedure described above, the coating 10 mils thick, were placed morozilnik at -30°C (-22°F) for 30 minutes, then subjects the bars were removed from the freezer and bar were placed in a hydraulic machine with sending the appropriate size and waited until the ice on the bar begins to melt, and immediately bent the bar for 10 seconds. Check the block for cracks, damage or visible breaks after reaching ambient temperature. Found the flexibility of the coating in relation to the diameter of the pipe.

Example 1

The manufacture of the powder coating composition of the prior art and its application

Example 1 of table 1 below illustrates the composition of thermosetting epoxy powder coatings without any brominated epoxides, prior to the present invention. Example 1 represents a sample containing 66.3% of epoxy resin Epon® 2024 with curing agent Epicure™ Curing Agent P-101 and dicyandiamide. All quantities are given in weight percent by total weight of the composition.

The ingredients of Example 1 were added to the tank and mixed by stirring for about 3 minutes. The mixture was then poured into a hot melting extruder, the extruded composition is then cooled by cooling rolls, water cooled, and then crushed using razvlechny rollers of Bantama, so it turned out particles having a size in the range of 2-100 microns with an average particle size of 40 Mick is metrov. Coverts of the composition of Example 1 were applied to a 4x4x1/4" steel panel, which was subjected to blasting.

The process of applying opaque composition of Example 1 includes the heating panels treated with phosphoric acid to a temperature of the metal 232°C (450°F) when setting the oven 243°C (470°F), and then immersing the panel in a fluidized bed containing the powder coating composition based on example 1, to achieve a film thickness of 250 microns. Coated panel was then overiden in a drying Cabinet at a temperature of 243°C (470°F) for 3 minutes. After curing, the panel was subjected to the tests for cathodic delamination and adhesion when soaking in water, as described above.

As shown in Table 2 of Example 1, it has a Tg of 109°C (to 228.2°F). When testing at 95°C (203°F) after 14 days it had a large cathodic delamination in (18.0 mm), and poor adhesion when soaking in water, estimated as 3 in accordance with CSA Z24520-98. After checking through 28 days cathodic delamination was $ 25.6 mm and evaluation of adhesion when soaking in water was 5 in accordance with CSA Z24520-98.

Example 2-3

Manufacturer of powder coating composition in accordance with the present invention and its application

Examples 2-3 Table 1 below illustrate the composition of a thermosetting epoxy powder coatings containing bronirovannui EPO is sydnaya resin, according to the present invention. Example 2 represents a sample containing 59.6% of bronirovannoj epoxy resin is Epon®1183. Example 3 is a comparative example which contains 57,8% bronirovannoj epoxy - EPOKUKDO® YDB-408 of KUKDO Chemical CO. For example 2 and 3, the epoxy curing agent is a dicyandiamide and curing agent 2MI. All quantities are given in weight percent by total weight.

Components contained in opaque compositions of Table 1 of example 2-3 were added to the tank and mixed by shaking for approximately 3 minutes. The mixture was then poured into a hot melting extruder, the extruded composition is then cooled by cooling rolls, water cooled, and then crushed using razvlechny rollers of Bantama, so it turned out particles having a size in the range of 2-100 microns with an average particle size of 40 micrometers. Each of the opaque compositions of Examples 2-3 of Table 1 was applied to separate 4x4x1/4" steel panels, which were subjected to blasting.

Covering the composition of example 2 was applied onto the pre-heated the acid-treated panel at 232°C (450°F) until the temperature of the metal 204°C (400°F), and then the panel was immersed in a fluidized bed containing the powder coating composition of example 2 shown in Table 1. Pokr is concealing panel was then overiden in a drying Cabinet at a temperature of 204°C (400°F) for 10 minutes. After curing, each panel was subjected to the tests for cathodic delamination and adhesion when soaking in water, as described above. The thickness of the finally utverzhdenii film is about 250 microns.

Covering the composition of example 3 was applied onto the pre-heated the acid-treated panel at 243°C (470°F) until the temperature of the metal 232°C (450°F), and then the panel was immersed in a fluidized bed containing the powder coating composition of example 3, see Table 1. Coated panel was then overiden in a drying Cabinet at a temperature of 243°C (470°F) for 2 minutes. After curing, each panel was subjected to the tests for cathodic delamination and adhesion when soaking in water, as described above. The thickness of the finally utverzhdenii film is about 250 microns.

0
Table 1
The composition of the powder coating
ComponentExample 1Example 2Example 3
Epon™ Resin 2024 (Resolution Performance Products, LLC)1to 66.380
Epon™ Resin 1007 (Resolution Performance Products, LLC)2014,2
Epon™ Resin 1183 (Resolution Performance Products, LLC)30to 59.60
EPOKUKDO® YDB-4O8 (KUKDO Chemical CO. LTD)30057,8
Epicure™ curing agent P-101 (Resolution Performance Products, LLC)40,80
The dicyandiamide curing agent (Degussa)0,611
Durite® SD 357B (Borden Chemicals, Inc.)50,872,6
Actiron 2MI Disperse (Synthron, Inc.)600,40,4
Resiflow 200A agent regulation of fluidity (Estron Chemical, Inc.)00,40,4
Tris Amino® (Dow Angus)70,30,50,5
Nyad™ M400 filler (NYCO Minerals, Inc.)827,616,218,7
Zeeospheres 400(3M)02,50
The zinc borate (Borogard ® ZB, US Borax)1,722
Bayferrox™ 140 pigment iron oxide (Bayer Corp.)10,80,8
Acrylonitrile/butadiene (Zealloy® 1411, Zeon Chemical)0,61,21,2
Cab-o-sil™ M5 untreated colloidal silica (Cabot, Inc.)0,30,40,4
1. Solid epoxy resin containing bisphenol a/epichlorohydrin containing half the weight percent of the agent regulation of fluidity, Modaflow® (Solutia, Inc.).
2. Solid epoxy resin containing bisphenol a/epichlorohydrin.
3. Solid epoxy resin containing commercially available brominated bisphenol a/epichlorohydrin.
4. Adduct of imidazole.
5. Phenol-glyoxalases of condensed ocvered the speaker agent, also known as TPE (tetraphthalate).
6. 2-Mei.
7. Tris(hydroxymethyl)aminomethan.
8. Natural metasilicate calcium.

28 days, 95°C
Table 2
Cathodic delamination and adhesion test when soaking in water
ExampleExample 1Example 2Example 3
Tg (cured powder)109°C135°C151°C
Cathode destruction
14 days, 95°C18,0 mm8.2 mm4.5 mm
28 days, 95°C35,6 mm12.6 mm9.3 mm
Adhesion when soaking in water
14 days, 95°C311
511
Flexibility (0°C)4,1°PD*)2,0°PD2,5°PD
*) the flexibility to example 1 was determined at -30°C.

Table 2, which contains Tg, test results cathodic delamination and adhesion when soaking in water Examples 2 and 3 illustrates that coverts compositions containing bronirovannui epoxy resin, to give a coating with a higher Tg, for example 135°f and 151°C compared to Tg 109°C for conventional FBE. Although flexibility is less than in example 1, a value from 2 to 2.5°PD acceptable for installation on pipes. Characteristics of cathodic delamination and adhesion when soaking in water of example 2 and 3 were significantly better than in Example 1, which contained 0% bronirovannoj epoxy resin.

Examples 4-7 Table 3 below illustrate bronirovannui epoxy resin contained in the covering composition thermosetting epoxy resin of the present invention with varying amounts of curing agent and bronirovannoj epoxy resin. Example 4 represents a sample containing 55,0% bronirovannoj epoxy - EPOKUKDO® YDB-408 and 30,0% phenolic curing agent - Kukdo KD-448H, both from KUKDO Chemical CO. Ltd. Example 5 is an example that contains 10,0% bronirovannoj epoxy - Epon1183. Example 6 is an example that contains 50,0% bronirovannoj epoxy - EPOKUKDO® YDB-408. Example 7 is an example that contains 95,0% bronirovannoj epoxy - EPOKUKDO® YDB-408. All examples 4-7 are dicyandiamide and curing agent 2MI. All quantities are given in weight percent by total weight.

The components that make up covering compositions of examples 4-7 of Table 3 were added to the tank and mixed by stirring for about 3 minutes. The mixture was then poured into a hot melting extruder, the extruded composition is then cooled by cooling rolls, water cooled, and then crushed using razvlechny rollers of Bantama, so it turned out particles having a size in the range of 2-100 microns with an average particle size of 40 μm. The obtained powders were tested for their Tg by differential scanning calorimetry.

As shown in Table 3, example 4, which has 30% of the curing agent has a glass transition temperature of 127°C for the cured powder. Example 5, which has only 10% bronirovannoj epoxy resin, gives a glass transition temperature of 123°C for the cured powder, as the content bronirovannoj epoxy resin increases (example 6-7), so the temperature value of the glass transition of the cured powder increases. Increase bronirovannoj epoxy resin is from 50 to 95% leads to an increase in Tg from 132 to 159°C.

Table 3
The composition of the powder coating
IngredientExample 4Example 5Example 6Example 7
Epon™ Resin 2024 (Resolution Performance Products, LLC)110,047,030,10
Epon™ Resin 1163 (Resolution Performance Products, LLC)2010,000
EPOKUKDO® YDB-408 (KUKDO Chemical CO. LTD)255,0050,095,0
Kukdo KD-448H(KUKDO Chemical CO., LTD.)330,0000
The dicyandiamide curing agent (Degussa)0,151,21,74 2,3
Durite® SD 357B (Borden Chemicals, Inc.)40,70,70,70,7
Actiron 2MI Disperse (Synthron, Inc.)50,50,50,50,5
Resiflow 200A agent regulation of fluidity (Estron Chemical, Inc.)0,40,40,40,4
Nyad® M400 filler (NYCO Minerals, Inc.)62,1539,115,50
Bayferrox® 140 pigment iron oxide (Bayer Corp.)0,80,80,80,8
Cab-o-sil® M5 untreated evaporating silica (Cabot,Inc.)0,30,30,30,3
Tg (cured powder)127°C123°C132°C159°C
1. Solid epoxy resin with bisphenol a/epichlorohydrin containing half the weight percent of the agent regulation of fluidity, Modaflow® (Solutia, Inc.).
2. Solid bronirovannaja bisphenol a/epichlorohydrin epoxy resin.
3. Phenol-formaldehyde resin with a small amount of 2-methylimidazole.
4. Fenolglikozidy condensed curing agent, which is also known as TPE (tetraphthalate).
5. 2-Mei.
6. Natural metasilicate calcium.

1. Composition of epoxy powder coating for pipes, comprising a homogeneous mixture containing: (A) from 5 to 99 wt.%, at least one functionalized bromine epoxy resin with a bromine content of from 5 to 60%, based on component (A)where the specified bromine functionalized epoxy resin is selected from the group comprising brominated epoksipolyurethane phenolic Novolac resin, brominated epoksipolyurethane crenoline Novolac resin, epichlorhydrine epoxy resin, brominated diglycidyl esters of 4,4 - (bishydroxyethyl) alkanes or mixtures thereof,
(B) from 0.5 to 40 wt.%, at least one curing agent for epoxy resins, and
(C) from 0.01 to 55 wt.%, at least one pigment, filler and/or coating additives,
gdavis.% are based on the total weight of the composition of the powder coating.

2. The composition according to claim 1, additionally comprising from 0.02 to 6.0 wt.%, at least one alkanolamine as component (D).

3. The composition according to claim 2, in which alkanolamine is selected from the group consisting of diethanolamine and Tris(hydroxymethyl)aminomethane.

4. Composition according to any one of claims 1 to 3, further comprising from 0.5 to 5.0 wt.%, at least one zinc-borate compound.

5. The composition according to claim 4, in which the zinc-borate compound is selected from the group consisting of compounds of the following formula: [Zn(BO2)2], [ZnB4O7·2ZnO], [2ZnO·3B2O3·3,5H2O].

6. The composition according to claim 1, in which the bromine content in the component (A) is from 20 to 55%, based on component (A).

7. The composition according to claim 1, containing from 25 to 80 wt.%, at least one functionalized bromine epoxy resin component (A).

8. The composition according to claim 1, in which component (A) is used functionalized the brominated bisphenol a/epichlorohydrin epoxy resin.

9. The composition according to claim 1, containing from 1.5 to 20 wt.%, at least one epoxy curing agent component (B).

10. A method of manufacturing a powder coating composition according to any one of claims 1 to 9, comprising the stages of (a) mixing together components (A), (B) and (C), (b) heating the mixed components to a temperature of PLA is ing mixture, (C) extruding the molten mixture, and (d) cooling, crushing and grinding to powder.

11. The method according to claim 10, including a preliminary mixing alkanolamine and/or compounds of zinc borate with other components of the powder coating in the manufacture of the powder coating composition containing alkanolamine and/or zinc borate according to any one of claims 1 to 9.

12. The method of applying powder coating on the base by applying the powder coating composition according to any one of claims 1 to 9 onto the surface of the substrate and curing the coating.

13. The method according to item 12, in which the base surface is an internal and/or external surface of the pipeline.

14. The product obtained using the method according to any of PP and 13.



 

Same patents:

FIELD: chemistry.

SUBSTANCE: powdered UV-curable composition contains 89.5-96.5 pts. wt oligoether(meth)acrylate, 1.0-2.7 pts. wt benzoyl-type photoinitiator, 1.0-1.5 pts. wt flow agent, 0.5-0.7 pts. wt degassing agent and a fluorine-containing modifying additive in form of a solid unsaturated compound with molecular weight of 850-2700 g/mol, obtained through synthesis from p-hydroxyethoxystyrene, diisocyanate in form of 1,6-hexamethylenediisocyanate or isophorone diisocyanate, and perfluorinated oligoester alcohol or oligoester diol with molecular weight of 500-2000 g/mol in amount of 1.0-5.6 pts. wt.

EFFECT: good physical and mechanical properties and obtaining coatings having high wear resistance, low dirt holding, good decorative and protective properties.

2 tbl, 16 ex

FIELD: chemistry.

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

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

3 cl, 21 ex, 10 tbl

FIELD: chemistry.

SUBSTANCE: invention refers to versions of solidificated powder coating composition and to method of cathodic protection of steel substrate. According to the first version, the composition contains as follows: (a) thermosetting resin, (b) zinc borate compounds in amount 0.5 to 4.75 wt % in relation to total solid weight, (c) curing agent for the specified structure, in amount effective for coating solidification, (d) filler, pigment and additive. Thermosetting resin is epoxy with functional groups of A/epichlorhydrin bicphenol. Curing agent is accelerated dicyandiamide or phenolic curing agent. According to the second version, the composition contains thermosetting epoxy, curing agent specified above, and zinc borate compound in amount 0.5 to 4.75 wt % in relation to total solid weight. Method of cathodic protection consists that steel substrate is machined and covered with the composition of the first version. It is followed with polarisation of steel substrate covered as cathode.

EFFECT: higher long-time cathodic disbandment resistance with high temperature and humidity application.

14 cl, 3 tbl, 6 ex, 1 dwg

FIELD: chemistry.

SUBSTANCE: present invention pertains to versions of compositions, which are used in making powder coatings for pipes. In the first version, the composition based on epoxide resin contains a mixture of a hardening agent and a primary amino alcohol. In the second version, the hardening composition based on epoxide resin contains a hardener-primary amino alcohol, which reacts with a phenol resin derivative. The amino alcohol used has the following structural formula: where each of R1 and R2 independently represents a C1-C6 hydroxyalkyl group or a C1-C6 alkyl group.

EFFECT: obtaining coatings with improved adhesion at high temperatures and humidity.

11 cl, 6 ex

FIELD: polymers.

SUBSTANCE: invention pertains to the technology of polymer functional materials and can be used in machine building for coating components of machines, mechanisms and transport systems, and primarily, flange joints of transport systems. The composite polymer material contains a polymer binding substance, polymer component and a dispersion additive. The polymer binding substance is polyamide 6. The polymer component is a mixture of thermoplastic, chosen from HDPE, polypropylene, PTFE with 0.75-10.5 wt % content of thermoplastic, chosen from "СЭВА", "ТПУ", "ДСТ", polyamide 49.7-50 wt %. The dispersion additive is natural silicate with content of 0.1-1.0 wt %. The functional coating method consists of two stages. At the first stage a layer with given thickness is deposited by dipping a hot base metal at 270-300°C into a pseudoliquid layer made from a composition based on polyamide 6, modified by thermoplastic, thermoplastic elastomer and natural silicate. At the second stage on the formed first layer, which is molten and at temperature of 240-270°C, a second layer of coating is deposited, by dipping in a pseudoliquid layer based on thermoplastic elastomer, modified by polyamide 6, thermoplastic, natural silicate, and then the formed coating is cooled in air.

EFFECT: invention allows for making a composite polymer coating with gradient of efficiency record on thickness suitable for providing for hermeticity and electrical insulation properties of flange joints of pipe lines.

2 cl, 4 ex, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to thermo-reactive heat-resistant silicon powder compositions for coating used on substrates which can be subjected to high temperature action. Claimed is the powder composition for coating containing, in addition to polysiloxane, 0.01-90 weight % particles of inorganic glass, which are melted and flow within temperature range of 300°C-700°C, at which organic components of coating burn out. At such temperatures, glass particles are capable of filling voids in films formed from coating powders, and preventing adhesion damage to coating on a substrate.

EFFECT: elaboration of powder composition for coating with excellent heat-resistant characteristics including resistance to adhesion damage (splitting and flaking-off) under high temperatures.

11 cl, 2 tbl, 2 ex

FIELD: technological processes.

SUBSTANCE: invention pertains to the technology of polymer functional materials and can be used in machine building when forming coatings for component part of machines, mechanisms and transport systems, and mainly pipes for pumping petroleum products. The method of forming composition coating from silicate polymer material involves mixing powder polymer particles and silicate particles. The mixture is then deposited on the surface of the object and heated. Polymer particles are flushed off and monocrystallisation of the coating is carried out. The powder polymer particles are chosen from a group containing polyamide, polyethyleneterphtalate, high pressure polyethylene. Silicate particles are chosen from a group containing montmorillonite, kaolin, tripolite. Heating and flushing off are done in a gas stream with density of 3·106-9·106 W/m2 for a period of 10-4-10-3 s. Depositing and monocrystallisation are done on an object, heated to temperature T=Tm+5÷40°C, where Tm is the melting temperature of the polymer, with pressure of the gas stream of 3-5 atmospheres. The coating is formed by depositing it on one or more ducts of the used device for depositing it, or is deposited by successive passage of the device with the polymer component, and then a device with the silicate component.

EFFECT: increased adhesive strength, hardness and ultimate stress limit, and design of a method which provides for high production effectiveness of the process and lower cost of the coating.

3 cl, 2 tbl

FIELD: chemistry.

SUBSTANCE: powdered coating agent contains solid particles of a resin-polyurathane binding substance with equivalent mass of olefinic double bonds ranging from 200 to 2000 and content of silicon bonded in alkoxy silane groups ranging from 1 to 10 mass % and a photoinitiator. In the method of obtaining a single layered or multilayered coating on substrates, in particular when obtaining multilayered coating for transportation equipment and their components (car body or car body components coating), at least one layer of this coating is deposited from a powdered coating agent. In that case, solidification of at least one layer of the above mentioned powdered coating is achieved through free-radical polymerisation of olefinic double bonds when irradiated with high energy radiation and through formation of siloxane atomic bridges under the effect of moisture.

EFFECT: obtaining a powdered coating, which is hard, has scratch resistance and good resistance to chemical effects.

8 cl, 1 tbl

FIELD: chemistry; inorganic.

SUBSTANCE: invention is related to a composition for production of insulating coatings on working surfaces of parts of machines, mechanisms and process equipment, e.g., flange joints in trunk pipelines. The composition comprises the following proportion of components, % by mass: 0.1-10.0 elastic modifier, 0.1-3.0 disperse filler, 0.1-0.5 functional additive, the balance to 100 being polyamide matrix. Disperse particles of structured elastomer in the form of ground rubber of 10-100 mcm particle sizes are used as the elastic modifier. Montmorillonite, or flint, or tripoli are used as the disperse filler. Dibutyl phthalate or dioctyl phthalate are used as the functional additive. The invention makes it possible to improve adhesive, deformation and insulating properties of the coating as well as its resistance to thermal-oxidative media.

EFFECT: improvement of properties of insulating coatings.

2 tbl, 10 ex

FIELD: powder materials for making coats of items during protracted operation at high working temperatures.

SUBSTANCE: proposed powder material contains the following components: from 40 to 65 mass-% of at least one solid epoxy resin which is semi-functional relative to thermal cross-linking by epoxy groups at equivalent mass of epoxide from 380 to 420 g/eq and ICI viscosity of melt at 150C from 2800 to 5000 mPa·s and softening temperature from 95 to 105C (A); from 15 to 35 mass-% of at least one solid linear epoxy resin on base of bisphenol A , AD and/or F whose functionality relative to thermal cross-linking by epoxy groups is equal to 2 maximum; from 15 to 30 mass-% of inorganic filler (b) and from 1 to 10 mass-% of at least one hardener. Powder material is applied on metal bases and are thermally cross-linked or hardened.

EFFECT: enhanced parameters of elasticity, wear resistance, resistance to scratching; enhanced water prooofness and corrosion resistance of coat.

12 cl,, 2 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: composition contains the following in wt %: epoxy-diane resin ED-20 20.0-26.0, polyester urethane rubber PPG-3A 6.0-9.0, modifier - unsaturated epoxide oligomer 6.0-9.0, filler - titanium oxide 10.0-14.0 and glass sludge 43.0-49.0, polyethylene polyamine 5-4. The composition hardens at 15-35°C in less than 48 hours.

EFFECT: simple technology of preparing and applying repairing composition.

2 cl, 5 ex

FIELD: chemistry.

SUBSTANCE: composition contains the following in wt %: epoxy-diane resin ED-20 20.0-26.0, polyester urethane rubber PPG-3A 6.0-9.0, modifier - unsaturated epoxide oligomer 6.0-9.0, filler - titanium oxide 10.0-14.0 and glass sludge 43.0-49.0, polyethylene polyamine 5-4. The composition hardens at 15-35°C in less than 48 hours.

EFFECT: simple technology of preparing and applying repairing composition.

2 cl, 5 ex

FIELD: chemistry.

SUBSTANCE: composition contains epoxy-diane resin modified with copolymer of styrene, methylmethacrylate and methacrylic acid BMS-86, dioctylephthalate, wollastonite and microcalcite, technical carbon, polyethylene polyamine and organic solvent.

EFFECT: coating has high adhesion to metal surfaces 93-97 N/cm, high shear strength 183-189 N/cm and high water-absorption 1,75 - 2% at 20°C.

2 tbl, 3 ex

FIELD: machine building.

SUBSTANCE: procedure for application of hard anti-friction epoxy coating on metal surface consists in preparing powder composition and in its further gas-flame sputtering. As epoxy resin in powder there is used soft pre-condensate of epoxy diane resin with molecular weight from 340 to 600 with aromatic amine at amount of 0.1-0.7 from stoichiometry mixed on rollers or in an extruder with the rest amount of aromatic amine to stoichiometry 0.9-1.2 and mixture of anti-friction powder and fibrous cut filler at amount from 50 to 250 wt. shares per 100 wt. sh. of mixture of resin with amine. Before gas-flame sputtering surface of metal is treated with a mixture of phosphoric acid (A), metal or its oxide (B) and phosphate or ammonia polyphosphate (C) at ratio A:B:C from 92:6:2 to 60:30:10.

EFFECT: reduced temperature of coating hardening at raised strength properties and deformation heat resistance.

1 cl, 2 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: composition contains: epoxy-diane resin, polyamide hardener, filler - finely dispersed quasicrystalline filler of the Al-Cu-Fe system with particle size less than 10 mcm, ultra-fine fluoroplastic powder and organic solvent.

EFFECT: high hardness, good physical and mechanical properties, adhesion to aluminium alloys, steels and polymer composite materials, moisture resistance, resistance to temperature drops with coating thickness of 70-100 mcm.

4 cl, 2 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: invention relates to coating materials and can be used in anticorrosion fireproof bioresistant coating of different materials. The enamel is a set including the following (wt %): a semi-finished enamel product from brominated epoxy resin in an organic solvent in which filler materials are dispersed 8.52-13.5, pigments 18.27-25.29 and a rheological agent 1.7-2.7, as well as an amine type hardener. The resin base is synthesised from epoxy resin and tetrabromodiane in molar ratio of 3:1 and temperature 130-150°C in the presence of a catalyst - an oligomer of aromatically conjugated hydroxyphenylene in amount of 0.65-0.75 moles, which does not contain amines and is obtained via oxidative condensation of alkyl resorcin at 250°C.

EFFECT: resin base has long working life, good technological characteristics; the coating is fungus-resistant, has self-extinction after coming out of a gas burner flame UL - 94, V0 - 0.

6 cl, 7 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: invention relates to coating materials and can be used in anticorrosion fireproof bioresistant coating of different materials. The enamel is a set including the following (wt %): a semi-finished enamel product from brominated epoxy resin in an organic solvent in which filler materials are dispersed 8.52-13.5, pigments 18.27-25.29 and a rheological agent 1.7-2.7, as well as an amine type hardener. The resin base is synthesised from epoxy resin and tetrabromodiane in molar ratio of 3:1 and temperature 130-150°C in the presence of a catalyst - an oligomer of aromatically conjugated hydroxyphenylene in amount of 0.65-0.75 moles, which does not contain amines and is obtained via oxidative condensation of alkyl resorcin at 250°C.

EFFECT: resin base has long working life, good technological characteristics; the coating is fungus-resistant, has self-extinction after coming out of a gas burner flame UL - 94, V0 - 0.

6 cl, 7 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: composition contains a mixture of epoxy resins type E-40 and E-05 in weight ratio (90-86):(10-14) or Epikot 223 and Epikot 401 in weight ratio (87-83):(13-17), a mixture of organic solvents, mainly in form of a mixture of toluene, butanol and butylacetate or xylene, isopropyl alcohol and ethylacetate mainly in weight ratio 22:40-38, a hardener of mainly polyamide type, and fine metal powder, mainly aluminium, in the following ratio in pts. wt: mixture of high-molecular epoxy resins 100-120, mixture of organic solvents 64-78, hardener 21-26 and fine metal powder 28-37.

EFFECT: composition provides good protective properties, good aesthetic characteristics of surfaces, high bending and torsion strength of the material and resistance to surface mechanical effects, possibility of quality painting and repainting surfaces.

5 cl, 5 tbl, 6 ex

FIELD: chemistry.

SUBSTANCE: invention discloses functional fluorine-containing silanes of general formula AC(O)-NR'(CH2)3Si(OR")3, where A is a normal or branched completely or partially fluorinated Alk C2-C12; R' - H or Alk C1-C4; R" - Alk C1-C4. The invention also discloses a method for synthesis of the said compounds which involves amidation of aminopropyl-triethoxysilane AC(O)-OR", where A and R" are as described above, with a compound of formula NHR'(CH2)3Si(OR")3, where R' and R" are as described above.

EFFECT: obtaining new functional fluorine-containing silanes which can be efficiently used to make quality water repellent coatings on different types of surfaces.

18 cl, 2 dwg, 2 tbl, 8 ex

FIELD: chemistry.

SUBSTANCE: invention relates to preparation of epoxy resin based protective polymer coatings which are meant for protecting components of structures made from aluminium alloys and steel from abrasive wear during operation. The protective coating composition contains the following (pts. wt): epoxy diane resin - 100.0, amine type hardener 10.0-50.0, modifier - low-molecular epoxyurethane, polysulphide or butadiene-acrylonitrile rubber in amount of 5.0-40.0 pts. wt, filler - fine-grained quasicrystalline metal filler of the Al-Cu-Fe system, micro-reinforcing filler in fibre or plastic form, selected from a group comprising natural or synthetic magnesium, aluminium or calcium silicates, quartz dust or their mixture in amount of 20.0-100.0 and an organic solvent 200.0-420.0. The amine type hardener is a polyamide resin or an organosilicon amine or their mixture. The composition can also contain flattening agents in amount of 15.0-35.0 pts. wt and pigments in amount of 5.0-40.0 pts. wt.

EFFECT: increased hardness, elasticity, moisture resistance, resistance of the coating to temperature differences of up to 150°C while retaining high level of adhesion to aluminium alloys, different steels, polymer composite materials and impact strength.

4 cl, 5 ex, 2 tbl

Up!