Structural adhesive compositions

FIELD: chemistry.

SUBSTANCE: invention relates to structural adhesive compositions and more specifically to 2K structural adhesive compositions. Adhesive compositions include (a) a first component containing (i) epoxy adduct which is a reaction product of reactants comprising a first epoxy compound, a polyol and an anhydride and/or a diacid; and (ii) a second epoxy compound; (b) a second component which reacts with the first component, which contains an amino compound. The amino compound captures a polyfunctional polyether amine based on polypropylene oxide. Said adhesives can be used to join substrate materials, such as two halves of the shell of wind turbine blades.

EFFECT: invention enables to obtain adhesive compositions with a long service life and which provide sufficient bonding strength.

12 cl, 1 dwg, 3 tbl, 8 ex

 

The scope to which the invention relates

This invention relates to structural adhesive compositions and more specifically to 2K structural adhesive compositions.

The level of technology

Wind turbines have gained increased attention as environmentally safe and relatively inexpensive alternative energy sources. For the development of wind turbines that are reliable and efficient, making many efforts.

Typically, a wind turbine includes a rotor with multi-blade wind motor. The blades of the wind turbine have the form of elongated airfoil section formed so as to provide torque in response to the wind. These blades of wind turbines transform the kinetic energy of the wind into torque or force that drives one or more generators United by methods known to those skilled in the technology.

One current approach to the production of wind turbine blades is to perform each blade or as two halves of the housing and the rod, or as two halves of the housing with a one-piece rod. In both cases, the two housing halves are joined together along their edges adhesional material to form a complete blade. Usually adhesional material is a two component (2K) structural mA�Arial, which includes two components that chemically interact (i.e. stapled), by mixing at ambient conditions or under mild heating, to connect together the housing halves. Alternative, can be used one-component (1K) adhesives, which require an external source of energy (heat, radiation or moisture) to facilitate a chemical reaction.

Adhesives that are used to connect the blades of the wind turbine must be able to withstand the centrifugal forces applied to each blade during use, and to withstand the strength of the connection during the lifetime of the blade at a constant cyclic thermal conducting and aggressive environmental influences. In addition, these adesione materials shall be suitable for relatively easy application.

In addition, for 2K adhesives viability is important. The term "viability" as you know specialists in the technology of adhesives, can be defined as the length of time for adhesional mixture to reach 50°C, and usually it is measured as the time interval in which the adhesive composition is sufficiently liquid so that it can be deposited on the substrate material to be connection. Adhesional material with a shorter viability is� material, in which these two components react more quickly, and adhesional material with longer viability is a material in which these two components react more slowly.

This invention is directed to adesione compositions that provide sufficient bond strength, easy to use and have a long viability for use in connecting substrates, such as the blades of the wind turbine.

Summary of the invention

One variant of implementation of the present invention discloses an adhesive composition comprising (a) a first component comprising (i) an epoxy adduct, which is formed as the reaction product of reactants comprising a first epoxy compound, a polyol, and an anhydride and/or dikisloty; and (b) a second component that chemically reacts with the first component.

In one embodiment, the implementation of the second component includes an amine compound.

Other embodiments of the disclosed multi-component composite coating of the substrate with the coating and methods for applying the coating to the substrate.

Brief description of the drawings

Fig.1 is a perspective view of a block of Teflon Assembly for the evaluation of structural adhesive composition according to a typical embodiment of this invention.

The implementation of the invention

For zelacletode detailed descriptions you need to understand that the invention may assume various alternative variations and the sequence of the stages, except when explicitly stated otherwise. In addition, except for any operating examples, or unless otherwise indicated, all numbers expressing, for example, quantities of ingredients used in the description and the claims, should be understood as modified in all instances by the term "approximately". Accordingly, unless otherwise indicated, the numerical parameters given in the following description and the attached claims are approximations that may vary depending on the desired properties that should be obtained according to the present invention. Without attempting to limit the application of the doctrine of equivalents to the scope of the claims, each numerical parameter should at least be considered in light of the number of significant digits that determine using conventional methods of rounding.

Notwithstanding that the numerical ranges and parameters, revealing the broad scope of the invention are approximations, the numerical values are given in the specific examples are reported as precisely as possible. Any numerical value, however, in essence, contains certain errors necessarily resulting from the standard changes found in the relevant testoserone.

In addition, it should be understood that any numerical interval shown here, includes all the subintervals. For example, the range of "1-10" includes all the subintervals between (and including) the specified minimum value of 1 and a specified maximum value of 10, that is, a minimum value equal to or greater than 1 and the maximum value is equal to or less than 10.

In this application the use of the singular includes the plural and plural encompasses singular, unless otherwise specified. In addition, in this application, the use of "or" means "and/or" unless otherwise specified, even though "and/or" may be explicitly used in certain examples.

As noted above, generally, the present invention discloses 2K (push-pull) structural adhesive composition, which is used to connect together two of the substrate material. Adhesive is applied either on one or on both of the connected material. Pieces level and press to adjust the thickness of the link can be added separators. For the curing process may be used to heat the shelter.

Appropriate materials of substrates that can be connected 2K structural adhesional components include, but are not limited to materials such as, metals or �the melt metals, natural materials such as wood, polymeric materials such as rigid plastics or composite materials.

2K structural adhesive composition includes two chemical components that when mixed before applying chemically react with each other and harden (cure) in ambient conditions or under low heat.

2K (push-pull) structural adesione compositions of the present invention suitable for use to connect the two halves of the body of the blades of wind turbines. In this application the mixed adhesive composition is applied along the edges of one or both halves of the body of the blades of the wind turbine. Half of the buildings then compress and allow the glue cured for several hours. Preferably, thermal shelter (at 70°C) is applied on half of the hull to aid in the curing process. Half of the housing or other components of the wind turbine blades may be formed from metals such as aluminum, metal alloys such as steel, wood, such as balsa wood, polymeric materials such as rigid plastic, or composite materials such as plastics, fiber-reinforced. In one embodiment, the housing halves are formed from optical fibers�'s composites or carbon fiber composites.

As noted above, 2K structural adhesives of the present invention is formed from two chemical components, namely a first component and a second component, which are mixed immediately before use. The first component (epoxy component) preferably includes epoxy adduct and other epoxysilane, or the second epoxysilane. The second component preferably includes a curing component, which interacts with the first component to form a relationship that provides a substrate onto which is applied the desired binding parameters. Preferably, the curing component is an amine compound, although other curing components, such as sulfide curing components can be used alternative.

The equivalent ratio of the amino group to apachegroup in the adhesive composition may vary from about 0.5:1 to about 1.5:1. Preferably, the equivalent ratio of the amino group to apachegroup from 1.0:1 to 1.25:1. Most preferably the equivalent ratio of the amino group to apachegroup is slightly greater than 1:1. As described herein, and equivalents of the epoxy group used in the calculation of the equivalent relationship of the epoxy group-based equivalent weight of epoxide to the first component and the amine equivalents used in the calculation of equivalent relations amine, based on the equivalent mass of hydrogen in the amine composition (AHEW) of the second component.

In one embodiment of the epoxy adduct is formed as the reaction product of reactants comprising a first epoxysilane, the polyol and the anhydride.

In another embodiment of the epoxy adduct is formed as the reaction product of reactants comprising a first epoxysilane, polyol and dikisloty. In yet another embodiment of the epoxy adduct is formed as the reaction product of reactants comprising a first epoxysilane, polyol, anhydride and dikisloty.

In these embodiments, the epoxy adduct comprises from 3 to 50 weight percent, and more preferably from 3 to 25 weight percent, of the first component, while the second epoxysilane comprises from 50 to 97 weight percent, and more preferably from 75 to 97 weight percent of the first component.

Useful first epoxy compounds that can be used to form an epoxy adduct include polyepoxide. Relevant polyepoxide include polyglycidyl ethers of Bisphenol A, such as epoxy resin EPON® 828 and 1001, and diepoxide Bisphenol F, such as EPON® 862, which are commercially available from Hexion Specialty Chemicals, Inc. Other useful polyepoxide include polyglycidyl ethers of polyhydric alcohols, polyglycidyl difficult�haunted esters of polycarboxylic acids, polyepoxide, which are obtained by epoxidation alafinova-unsaturated alicyclic compounds, polyepoxide containing oxyalkylene epoxy group in the molecule and an epoxy Novolac resin. Other non-limiting first epoxy compounds include epoxidized Novolac of Bisphenol A, epoxidized phenolic novolak, epoxidized crazily novolak, and triglycidyl-p-aminophenylalanine.

Useful polyols that can be used to form an epoxy adduct include diols, triola, tetraol and more highly functional polyols. The polyols can be based chain polyether derived from ethylene glycol, propylene glycol, butyleneglycol, hexyleneglycol, etc. and mixtures thereof. The polyol may also be a based chain complex of the polyester obtained by polymerization with ring opening of caprolactone. The corresponding polyols can also include a simple polyester polyol, poliuretanoviy, poliocephala, acrylic polyol, complex polyetherpolyols, polybutadienes, hydrogenated polybutadienes, polycarbonatediol, polysiloxanes and combinations thereof. Polyamines corresponding to the polyols may also be used, and in this case, instead of the carboxylic acid esters to form amides with acids and anhydrides.

The corresponding d�Ola which can be used to produce epoxy adduct are dialami having an equivalent weight of hydroxyl from 30 to 1000. Typical diols having an equivalent weight of hydroxyl from 30 to 1000, include diols sold under the trademark of Terathane®, including Terathane® 250, available from bivista. Other typical diols having an equivalent weight of hydroxyl from 30 to 1000, include ethylene glycol and its simple polyetherdiol, propylene glycol and its simple polyetherdiol, butyleneglycol it simple and polyetherdiol, hexyleneglycol it simple and polyetherdiol, complex polyetherdiol synthesized by polymerization with ring opening of caprolactone, and Orlandini synthesized by the reaction of cyclic carbonates with diamines. The combination of these diols and simple polyetherdiol obtained by combining different diols described above can also be used. Dimeric diols may also be used, including diols sold under the trade names Pripol® and Solvermol®, available from Cognis Corporation.

Can be used polyols on the basis of polytetrahydrofuran sold under the trademark of Terathane®, including Terathane® 650, available from Invista. In addition, can also be used polyols based on dimer diols sold under the trade names Pripol® and Empol®, available from Cognis Corporation, or polyols on Bionova, to�to tetrafunctional polyol Agrol 4.0, available from BioBased Technologies.

Useful anhydride compounds for the functionalization of the polyol with acid groups include hexahydrophthalic anhydride and its derivatives (for example, methylhexahydrophthalic anhydride); phthalic anhydride and its derivatives (for example, methylphthalic anhydride); maleic anhydride; succinic anhydride; trimellitic anhydride; pyromellitic of dianhydride (PMDA); 3,3',4,4'-oxydiphthalic of dianhydride (ODPA); dianhydride 3,3',4,4'-benzophenonetetracarboxylic acid BTDA); and 4,4'-hexafluoroisopropylidene-diffley anhydride (FDA). Useful dicyclomine compounds for the functionalization of the polyol with acid groups include phthalic acid and its derivatives (for example, methylphthalic acid), hexahydrophthalic acid and its derivatives (for example, methylhexahydrophthalic acid), maleic acid, succinic acid, adipic acid, etc. Any dibasic acid and anhydride may be used; however, preferred anhydrides.

In one embodiment, the implementation of the polyol includes a diol, an anhydride includes monoamide, and the first epoxysilane includes diepoxybutane, in which the molar ratio of diol, monongalia and diepoxybutane in epoxy adduct can vary from 0,5:0,8:1,0 to 0,5:1,0:6,0.

In another embodiment of the polyol includes a diol, an anhydride includes �enangered and the first epoxysilane includes diepoxybutane, in which the molar ratio of diol, monoamide and diepoxybutane in epoxy adduct can vary from 0.5:0.8:the 0,6 0,5:1,0:6,0.

In another embodiment of the second epoxysilane first component is diepoxybutane, which has an epoxy equivalent weight from about 150 to about 1000. Relevant diepoxide having an epoxy equivalent weight from about 150 to about 1000, include polypropylene ethers of Bisphenol A, such as epoxy resin EPON® 828 and 1001, and diepoxide Bisphenol F, such as EPON® 862, which are commercially available from Hexion Specialty Chemicals, Inc.

In another embodiment of the second epoxysilane first component is diepoxide connection or higher functional epoxides (collectively, "polyepoxide"), including polyglycidyl ethers of polyhydric alcohols, polyglycidyl esters of polybasic carboxylic acids, polyepoxide, which are obtained by epoxidation alafinova - unsaturated alicyclic compounds, polyepoxide containing group oxyalkylene in the epoxy molecule, and epoxy Novolac resins.

Other non-limiting second epoxy compounds include epoxidized Novolac of Bisphenol A, epoxidized phenolic novolak, epoxidized crazily� novolak, and triglycidyl-p-aminophenylalanine.

In another embodiment of the second epoxysilane first component comprises epoxide adduct-dimeric acid. Epoxide adduct-dimeric acid can be obtained as the reaction product of reactants comprising diepoxide connection (such as epoxysilane Bisphenol A) and dimeric acid (such as dimeric C10-C12acid).

In another embodiment of the second epoxysilane first component includes a copolymer of butadiene and Acrylonitrile with terminal carboxyl group is modified with epoxysilane.

Useful aminosidine that can be used include primary amines, secondary amines, tertiary amines, and combinations thereof. Useful aminosidine that can be used include diamines, triamine, tetramine and higher functional polyamines.

The corresponding primary amines include alkylamines, such as 1,2-diaminoethane, 1,3-diaminopropane, 1,4-diaminobutane, neopentylene, 1.8-diaminooctane, 1,10-diaminodecane, 1,12-diaminododecane etc; 1,5-diamino-3-oxapentane, Diethylenetriamine, Triethylenetetramine, Tetraethylenepentamine, etc.; cycloaliphatic diamines such as 1,2-bis(aminomethyl)-cyclohexane, 1,3-bis(aminomethyl)cyclohexane, 1,4-bis(aminomethyl)-cyclohexane, bis(aminomethyl)norbornane and�.; aromatic alkylamine, such as 1,3-bis(aminomethyl)benzene (m-xylodemon) and 1,4-bis(aminomethyl)benzene (p-xylodemon) and the products of their reaction with epichlorohydrin, such as Gaskamine 328, etc.; ending with an amino group of polyethylene glycol, such as Jeffamine series ED (Jeffamine ED series) from Huntsman Corporation and ending with the amino group polypropyleneglycol, Jeffamine series D (Jeffamine D series) from Huntsman Corporation; and ending with the amino group polytetrahydrofuran, such as Jeffamine number of EDR (Jeffamine EDR series) from Huntsman Corporation. Primary amines having a functionality higher than 2, include, for example, Jeffamine of a number T (Jeffamine T series), available from Huntsman Corporation, such as ending with the amino group propoxycarbonyl trimethylolpropane or glycerin and aminirovanie propoxycarbonyl pentaerythritol.

Other amines that may be used include isophorondiamine, methanediamine, 4,8-diaminetetra-[5.2.1.0]decane and N-AMINOETHYLPIPERAZINE.

Preferred aminosidine include Triethylenetetramine (THETA), ISOPHORONEDIAMINE, 1,3-bis(aminomethyl)cyclohexane and simple polyetheramine based polypropyleneoxide.

Preferred simple polyetheramine based polypropyleneoxide includes the product of a number of Jeffamine (Jeffamine) from Huntsman Chemical, Houston, Texas. Products of a number of Jeffamine (Jeffamine) are simple polyetheramine, kharakterizujuschie� duplicate links of oxypropylene in the corresponding structures.

One typical class of products Jeffamine, the so-called products of a number of Jeffamine D ("Jeffamine D") are ending with the amino group of the PPG (propylene glycols), ending with the amino group, the following structure (formula (I)):

where x=2-70.

Jeffamine D-230 (Jeffamine D-230) is one of the products of a number D, which is preferably used. Jeffamine D-230 has an average molecular weight of approximately 230 (in which x=2,5), and the equivalent weight of hydrogen in the amine composition (AWWA) approximately 60. Other typical products of a number of Jeffamine D, which can be used in accordance with the formula (I) include compounds that have x from 2.5 to 68.

Another simple polyetheramines based polypropyleneoxide, which are preferably used are mainly of tetrafunctional, primary amines with the molecular weight from 200 to 2,000, and more preferably from 600 to 700, and having EVVA more than 60, and more preferably from 70 to 90. Jeffamine XTJ-616 (Jeffamine XTJ-616) is one of the preferred simple polyetheramines based polypropyleneoxide, which can be used in the present invention. Jeffamine XTJ-616 has the molecular weight of approximately 660 and EWA 83.

Higher AWWA amino compounds, such as Jeffamine XTJ-616 and �jeffamine D-230, can be particularly useful in 2K adhesive compositions, in which more desirable long pot life. Normal tetramine, such as Triethylenetetramine, with lower AWA are basically comparing a shorter pot life. The present invention thus allows to manipulate the viability of tetrafunctional amines, such as Jeffamine XTJ-616.

In yet another embodiment, to implement anti-adhesive compositions can be added fillers, as part of the first component and/or as part of the second component.

Useful reinforcing fillers that can be injected into the adhesive composition to impart improved mechanical properties, include fibrous materials such as fiberglass, fibrous titanium dioxide, threadlike carbonate (aragonite) and carbon fiber (multiwall carbon nanotube). In addition, fiberglass, chopped to 5 μm or wider and up to 50 μm or longer, can also provide additional tensile strength. More preferably, use glass fiber chopped to 5 μm or wider and to 100-300 µm in length. Preferably, such reinforcing fillers, if used, comprise from 2 to 20 weight percent of the adhesive composition.

In yet another embodiment of the fillers, TIX�psychotropic substances, pigments, shades and other materials may be added to the first or second component of the adhesive composition.

Useful thixotropic agents that may be used include untreated colloidal silica and treated colloidal silica, a wax Castor, clay, and organic clay. In addition, fibers such as synthetic fibers, such as Aramid fiber (Aramid® and Kevlar fiber (Kevlar®), acrylic fibers and engineered cellulose fiber may also be used.

Useful pigments or shades can include red iron pigment, titanium dioxide, calcium carbonate, and phthalocyanine blue.

Useful fillers that can be used in a mixture with thixotropic means may include inorganic fillers such as inorganic clay or silicon dioxide.

In yet another variant implementation, if necessary, the adhesive composition may be administered catalyst, preferably as part of the second component to promote the reaction of the epoxy groups of the first component and the amine groups of the second component.

Useful catalysts that can be introduced into the adhesive composition, products include Ancamide®, available from Air Products and products sold as "Accelerators" ("Accelerators") are available from Huntsman Corporation, One typical catalyst is an Accelerator 399 (Accelerator 399) on the basis of piperazine (AWA: 145), available from Huntsman Corporation. When using such catalysts include from 0 to about 10 weight percent of the full weight of the adhesive composition.

In addition, the catalytic effect can be expected from the reaction product of epichlorohydrin from the first component and aminosidine of the second component in an equivalent ratio of 1:1. An example of such a product is Tetrad® and Tetrad®C, available from Mitsubishi Gas Chemical Corporation.

An illustration of the invention are the following examples, which should not be considered as limiting the invention in its details. All parts and percentages in the examples as well as throughout the description are by weight, unless otherwise indicated.

Examples

Synthesis of epoxy resin modified simple polyester - complex polyester

In chetyrehosnuju flask equipped with a fridge, a thermometer, stirrer and input of nitrogen, add 304,6 grams hexahydrophthalic anhydride and 248,1 grams of Terathane® 250. The mixture was heated to 100°C with stirring in a nitrogen atmosphere and the reaction mixture was kept at 100°C for 155 minutes. The reaction mixture was cooled to 60°C and then added 1431,6 grams of EPON 828 (EPON 828) and 15.0 grams of triphenylphosphine. The reaction mixture was heated to 110°C and maintained at this temperature�re for 150 minutes. Then, the mixture was cooled to room temperature. End connection has at 99.89% solids, acid number of 0.2, and an equivalent weight of epoxide 380,7. The final compound is an epoxy adduct of the first component 2 of the adhesive material provided in part 1 of table 1 below.

Evaluation of adhesives with and without epoxy adduct. Assessment adgezionnykh systems with varying equivalent weights hydroxyl amine

The following examples compare 2K adesione composition without epoxy adduct (example 1) with 2K adhesional compositions with an epoxy adduct (examples 2-4). The compositions of the first component (part 1) and second component (part 2) 2K adgezionnykh compositions shown in table 1.

Table 1
FormulaExample 1Example 2Example 3Example 4
Part 1
Epon 8281464140,543
Epon 828/Terathane 250/NRA2-12 126
Microglass 9132362-4
Hakuenka CCR-S4---1,5
Wacker HDK H1753,53,253,53
Paint AYD ST 845460,020,020,020,01
Part 2
Jeffamine D-230711,5121211,6
Jeffamine XTJ-616855-2,5
Triethylenetetramine (TETA)9--2,3-
Isophorondiamine� (IFDA) 10---Of 1.35
Accelerator 399112,22,22,20,5
Microglass 913231,5684
Hakuenka CCR-S411,562
Wacker HDK H1752,752,522,5
Paint AYD PC 9298120,010,010,010,01
Results
Aminosidine/epoxysilane1,0301,0321,0331,036
The shear strength when bonding lap shear (MPa) 24,526,725,5Of 31.4
Elongation(%)3,53,43,73,5
Tensile strength (MPa)65616855
Modulus(MPA)3185312734732931
(Data range)(3025-3300)(2974-3274)(3233-3671)(2733-3218)
The fatigue test (load 8 MPa)
Cycles to failure173532> 432000337062329371
Cycles to failure219062> 432000> 432000> 432000
Average > 432000337062329371
1. Resin bisphenol-α-epichlorohydrin, available from Huntsman Advanced Materials.
2. An example of the synthesis;
3. Chopped glass fiber treated with silane, from Fibertec.
4. Precipitated calcium carbonate, available from Shiraishi Kogyo Kaisha.
5. Hydrophobic colloidal silica available from Wacker Chemie AG.
6. Colorant base Org yellow, available from Elementis Specialties.
7. Polyoxyalkylene, available from Huntsman Corporation.
8. Polyoxyalkylene, available from Huntsman Corporation.
9. Triethylenetetramine, available from Dow Chemical Co.
10. Isophorondiamine, available from Evonik AG.
11. A mixture of the alkanolamine/piperazine derivative, available from Huntsman Corporation.
12. Pigment dispersion Phthalo Blue, available from Elementis Specialties.

In each of examples raw mA�Arial, listed in table 1 were mixed using a mixer Speedmixer DAC 600 FVZ (commercially available from FlackTek, Inc.). Ingredients 1 and 2 were mixed for 2 minutes at 2350 revolutions per minute (rpm) in part 1. Was then added paragraphs 3-6 and stirred for one minute at 2350 rpm. Paragraphs 7 to 11 were mixed for 1 minute in part 2 and then the remaining ingredients were added and mixed for one minute in part 2. During the mixing process, the mixture was checked with a spatula and gave additional time for mixing, if necessary, to ensure uniformity. The final stage of the mixing process consisted of mixing the mixture of the air motor in a vacuum sealed apparatus for 5 minutes at 28-30 inches of vacuum pressure. After the final stage of the air mixing motor adesione compositions were prepared to test.

Part 1 and part 2 are mixed in a volume ratio of 2:1. In some cases, the weight ratio was determined to check the properties. The ratio of amino groups to epoxypropyl a little more support units in all the examples, to ensure complete reaction of apachegroup, as shown in the results section of table 1. The corresponding weight ratio of part 1 and part 2 were weighed and mixed in a mixer DAC for one minute at 2350 rpm and immediately mixed�Wali under vacuum as described in the previous paragraph. The mixed sample is then subjected to the following tests.

Test for shear lap joint bonding: test Samples were 25 mm ×100 mm was cut from unidirectional 6-ply glass/epoxy laminates supplied by MFG, Inc., remote surface layer. The samples for tests were noted by 12.5 mm on one end. The adhesive was applied uniformly on one of the samples for testing within the marked area for each connective glue. The uniformity of the thickness of the ties provide the addition of 1.0±0.5 mm glass balls separation. Dividing the bulbs should be scattered evenly on the material, covering not more than 5% of the total contact area. Another test sample is placed on the connection area, and placed a spring-loaded clamps, such as connecting clips (Binder Clips from Office Max) or mini spring clamps (Mini Spring Clamp from Home Depot), one on each side of the joint to seal the bonding during heat treatment. Pay attention to align parallel edges. The excess glue that squeezes out, remove with a spatula before baking. The coupling Assembly provide an open time of the adhesive 15 to 30 minutes and subjected to heat treatment at 70 degrees Celsius for six hours, and subsequent cooling, the remaining surplus is sprinkled with sand. Connection condition�dominated at room temperature for, at least 24 hours. Compounds were inserted into the grips wedge action and tore at a speed of 10 mm per minute, using a model 5567 tensile testing machine Instron (Instron model 5567) in the stretch mode. The shear strength when bonding overlap was calculated using a software package Instron (Instron's Blue Hill software package).

Mechanical properties of free films: the same adhesive mixture was used to obtain dense free film in the form of a dumbbell cutting material carefully to avoid any air pockets. Fig.1 Teflon is an example of the template to produce five cavities in the shape of a dumbbell. The template is glued to a solid piece of Teflon double-sided adhesive tape to the cutting of the adhesive in the cavity. This Assembly provide an open time on the air for 15-30 minutes and then subjected to heat treatment at 70°C for 6 hours. Condition for at least 24 hours, and then free the film in the form of dumbbells is pushed from the template. The actual thickness and width were recorded by the software in a tensile testing machine brand "Instron" 5567. Then, the barbell was inserted in the clamp wedge action and pulled at a speed of 50 mm per minute. The percent elongation, tensile strength and modulus is determined using a software package Instron (Instron's Blue Hill software package).

Test fatigue �couplers overlap when gluing with adjustable load was made using the same laminate and the design of the test specimen such as described in the previous paragraph. Automated system using "Instron", power steering, hydraulic, test equipment closed system, and a personal computer with software developed by Westmoreland Mechanical Testing and Research, Inc., introduces tools for machine management. Each test specimen was inserted into the grips wedge action along with a friction-held strips of a thickness equal to the thickness of fiberglass substrates, and an adhesive seam, ensure axial loading. The test was performed at room temperature with an R-ratio of 0.1 to 5 Hz sinusoidal waveform and load up to 8 MPa. The test was continued until 432000 cycles or failure.

Assessment of viability of adhesives having varying equivalent weights of aminosidine of hydroxycobalamine:

Table 2 shows the comparison of the viability of a simple polyetheramine on the basis of propylene oxide, Jeffamine XTJ-616 (Jeffamine XTJ-616) and Triethylenetetramine on the basis of ethylene oxide in such compositions, in which the ratio of aminosilane/epoxysilane supported from 1.03 to 1.05. The compositions and results are shown in table 2.

Table 2
Comparison of viability
FormulaExample 5Example 6
Part 1
Epon 82814443,5
Epon 828/Terathane 250/NRA266
Microglass 9132321
Wacker HDK3.53
Paint AYD ST 845460,010,01
Part 2
Jeffamine D-23071212
Jeffamine XTJ-61685
Triethylenetetramine (THETA)-2,3
Accelerator 399110,50,5
Microglass 9132357
Hakuenka CCR-S436,64
Wacker HDK2,252,36
Paint AYD PC 92980,010,01
Aminosidine/epoxysilane (volume mixture of 2:1)1.0331.0464
Viability, minutes17463
Peak temperature (°C)73150
Minutes to reach the peak23983
1. Resin bisphenol-α-epichlorohydrin, available from Huntsman Advanced Materials.
2. An example of the synthesis.
3. Chopped glass fiber treated with silane, oTFibertec.
4. Precipitated calcium carbonate, available from Shiraishi Kogyo Kaisha.
5. Hydrophobic colloidal silica available from Wacker Chemie AG.
6. Colorant base Org yellow, available from Elementis Specialties.
7. Polyoxyalkylene, available from Huntsman Corporation.
8. Polyoxyalkylene, available from Huntsman Corporation.
9. Triethylenetetramine, available from Dow Chemical Co.
10. Isophorondiamine, available from Evonik AG.
11. A mixture of the alkanolamine/piperazine derivative, available from Huntsman Corporation.
12. Pigment dispersion Phthalo Blue, available from Elementis Specialties.

In this experiment both the composition (examples 5 and 6) used the same amount of Accelerator 399, which also has a significant impact on viability. If the Accelerator 399 was absent, vitality, as found, was much higher.

Viability is defined as the time interval from the time when part 1 (epoxy component) and part 2 (amine component) were mixed, until the time when the internal temperature of the adhesive has reached 50°C in the mass of 415 ml. Part 1 and part 2 were mixed in a volume ratio from 2 to 1, using a static mixer: pneumatic double applicator P C COX distributed mixed glue into a paper Cup marked with 415 ml, and noted the start time. The Cup is immediately placed in a water bath at 25°C with a thermocouple inserted into the center of the mixed adhesive material. The Registrar on the basis of the software used to record the temperature every minute to determine the viability of, the actual time required to reach 50°C, peak temperature and the time required to reach peak temperature.

Evaluation of adhesives with a reinforcing filler and without him

In this experiment the effect of adding fiberglass as reinforcing filler compared with the composition of the sample as described in table 3.

Examples 7 and 8 in table 3 are comparative study without microglass media 9132 (fiberglass strands of average length of 220 μm) and with him. The results indicate a significant increase of the module when there is microstella 9132.

td align="left"> Epon 8281
Table 3
The effect of glass fiber on the properties of the module
FormulaExample 7Example 8
Part 1
4141
Epon 828/Terathane 250/HHPA21212
Microglass 91323-6
Wacker HDK H1753,252
Paint AYD ST 845460,020,02
Part 2
Jeffamine D-23071212
Jeffamine XTJ-616855
Accelerator 399112,22,2
Microglass 91323-6
Hakuenka CCR-S41,51,5
Wacker HDK H1752,52,5
Paint AYD PC 9298120,01 0,01
Aminosidine/epoxysilane1,0321,032
The strength of the shear lap joint bonding (MPA)27,724,4
Elongation(%)4,83,5
Tensile strength (MPa)6661
Modulus (MPa)24443211
(Data range)(2246-2673)(3160-3269)
1) Resin bisphenol-α-epichlorohydrin, available from Huntsman Advanced Materials.
2) Example of synthesis.
3) Milled glass fiber treated with silane, from Fibertec.
4) Precipitated calcium carbonate, available from Shiraisbi Kogyo Kaisha.
5) Hydrophobic colloidal silica available from Wacker Chemie AG.
6) Colorant base Org yellow, available from Elementis Specialties.
7) Polyoxyalkylene, available from Huntsman Corporation.
8) Polyoxyalkylene, available from Huntsman Corporation.
9) Triethylenetetramine, available from Dow Chemical Co.
10) Isophorondiamine, available from Evonik AG.
11) a Mixture of the alkanolamine/piperazine derivative, available from Huntsman Corporation.
12) the pigment Dispersion Phthalo Blue, available from Elementis Specialties

While certain embodiments of this invention described above for the purpose of illustration, it will be obvious to experts in the technology that numerous changes in the details of this invention can be made without departing from the invention as defined in the appended claims.

1. Composition, which includes:
(a) a first component containing:
(1) an epoxy adduct which is the reaction product of reactants comprising a first epoxysilane, the polyol and anhydride and/or dikisloty; and
(2) the second epoxysilane; and
(b) a second component that chemically reacts with the first component containing aminosidine�, which covers polyfunctional simple polyetheramine based polypropyleneoxide.

2. A composition according to claim 1 in which the said anhydride comprises at least one of hexahydrophthalic anhydride, phthalic anhydride, methylhexahydrophthalic anhydride, methylphthalic anhydride, maleic anhydride and succinic anhydride, preferably hexahydrophthalic anhydride.

3. A composition according to claim 1, in which a specified dikelola includes hexahydrophthalic acid, phthalic acid, methylhexahydrophthalic acid, methylphthalic acid, maleic acid, succinic acid and/or adipic acid.

4. A composition according to claim 2, in which the specified aminosidine further comprises Triethylenetetramine, ISOPHORONEDIAMINE or 1,3-bis(aminomethyl)-cyclohexane.

5. A composition according to claim 1, in which the specified polyfunctional simple polyetheramine based polypropyleneoxide includes:
a) the modified polypropylene with terminal amino groups of the formula I:

where x=2-70;
(b) a tetrafunctional primary amine having an average molecular weight from 200 to 2000 and an equivalent weight of hydrogen in the amine composition is greater than 60; or
(c) is preferably tetrafunctional primary amine having an average molecular weight of from 600 to 700 and the equivalent weight of hydrogen in the amine composition �t 70 to 90.

6. A composition according to claim 1, in which the specified first component further comprises a reinforcing filler, such as glass fibers, fibrous titanium dioxide, threadlike carbonate and/or carbon fiber.

7. A composition according to claim 1, in which the specified second epoxysilane includes: (a) diepoxide having an equivalent weight of epoxide from 150 to 1000;
(b) the adduct epoxysilane-dimeric acid; or
(c) a butadiene-Acrylonitrile copolymer with carboxyl end groups modified with epoxysilane.

8. A composition according to claim 1, in which said polyol includes:
(a) diol having an equivalent weight of hydroxyl from 30 to 1000;
(b) a polyol-based polytetrahydrofuran; or
c) polyol bio-based.

9. A composition according to claim 1, in which the specified epoxy adduct comprises from 3 to 50 wt.% of the specified first component.

10. A composition according to claim 1, in which the equivalent ratio of aminosilane to epoxyamine in the adhesive composition is from 1.0:1 to 1.25:1.

11. A method of manufacturing the blades of the wind turbine, including:
(a) applying the composition according to claim 1 on the first part of the blade of the wind turbine;
(b) connection of the specified first part of the blade of the wind turbine with the second part of the blades of the wind turbine, the contacting of the specified second part with the adhesive comp�the positions; and
(c) curing said adhesion composition.

12. The blade of the wind turbine comprising a cured composition according to claim 1.



 

Same patents:
Wind engine // 2552017

FIELD: engines and pumps.

SUBSTANCE: wind engine includes a horizontal shaft with the main multiple-blade wind wheel installed on it and provided with blades of enlarged surface area in the air flow direction, an outer shell and a cone-shaped guide for the air flow of the middle zone. On the hub of the main wind wheel there put is an additional multiple-blade wind wheel of a smaller diameter with a toroid-shaped guide for the air flow of the central zone. The outer shell of the additional multiple-blade wind wheel is attached to blades of the main wind wheel. On outer shells of both wind wheels, uniformly located blades of the second level are fixed.

EFFECT: invention allows increasing total surface area of blades.

3 cl, 5 dwg

FIELD: machine building.

SUBSTANCE: universal rotor is referred to machine building, in particular, to the production of rotors for windmills, hydroturbines, screw propellers, fans and aircrafts. A universal rotor comprises at least two bow-shaped blades which are set around the rotor rotation axis 3 and each of them is connected to a fastener installed along the rotor rotation axis 3. The generatrix of the cambered side surface 1 of the bow-shaped blade is located close to the plane parallel to the rotor rotation axis 3. The upper edge of the cambered side surface 1 of the bow-shaped blade is connected with the edge of the concave side surface 2 of the bow-shaped blade. The concave surface 2 of the bow-shaped blade without sharp bends and corners is inclined from the rotor rotation axis in the direction to the base of this blade. The edge of the concave side surface 2 of the bow-shaped blade is connected with the upper edge of the cambered side surface 1 of the bow-shaped blade at an angle. The opposite edge of the concave side surface 2 of the bow-shaped blade is connected with the cambered side surface 1 of the adjoining bow-shaped blade at an angle.

EFFECT: invention is aimed at the reduction of energy flow's energy losses.

2 dwg

Wind wheel // 2549008

FIELD: machine building.

SUBSTANCE: wind wheel comprising a hub and blades from a bent resilient strip connected to the hub is proposed. Every blade is made by single-sided joint of the opposite ends of a bent resilient strip. Additionally its blades are set with the designed incidence angle at their end and at the units of their connection to the hub.

EFFECT: use of the invention will allow for the increase of wind turbine efficiency.

2 dwg

Windwheel // 2542161

FIELD: power industry.

SUBSTANCE: invention refers to wind power industry, particularly to windwheels of wind power and wind electric power plants with horizontal rotation axis, designed mainly for operation in segmented-type power generators. The effect is achieved by equipping the main blade of windwheel with a joint where L-shaped arm is attached, with tensioning gear with a cable fixed at one side and rocker system at the other side. Sail fins are made in the form of band loops with band ends attached to the rockers, and the loop put on the cable.

EFFECT: simplified and more cost-effective structure, twist enabled.

4 dwg

FIELD: power engineering.

SUBSTANCE: inventions relate to wind-power engineering and can be used for conversion of wind power. The rotor blade (200) consists of a body (206) with aerodynamic structure (204) with a pressure side (204.2) and suction side (204.1), base on the first end of the body (206) and tip (100) on the second end of the body, besides, for connection with the tip (100) the bode (206) has the second components of the connecting mechanism, which contain mating with the first guides (110) of the tip (100) the second guides (210), and also the second blocking devices (220) interacting with the first blocking devices (120) of the tip (100). The tip (100) of the rotor blade (200) is designed as an independent detail, connected with the blade (200), and has the first connecting surface (102), facing towards the connected blade. To make the connection with the blade (200) on the connecting surface (102) the first guides (110) with the direction (FR) of input and first blocking devices (120) are provisioned as the first components of the connecting mechanism for fastening the tip (100) on the blade (200).

EFFECT: inventions allow to simplify the unit operation and reliability of its transportation.

16 cl, 7 dwg

FIELD: electricity.

SUBSTANCE: invention relates to electrical engineering and wind energetics. Rotor of the segmental electric generator includes shaft, hub, rim and magnetic cores in form of two angle connections of straps, one is inside the other one. The straps have fixtures for securing on the rim. Technical result is improvement of the generator efficiency upon minimisation of its price as the rotor is magnetically interacts with the stator via two air gaps: outside and inside, thus reducing magnetic dispersion. Additional electromotive force increasing is due to additional rotor elements only, at that the magnetic field source is the same.

EFFECT: use of strap elements increases produceability.

1 dwg

FIELD: power engineering.

SUBSTANCE: wind wheel of the segment type electric generator, containing a hub, blades with the stringers designed as a sailing fin assembly, according to the invention, has fastening of stringers to the rim connected to the hub by means of spokes which are designed as flat-topped brackets on vertical sides of which the pairwise cuts are made which contact to the rim. Flat-topped brackets are connected to the rim fasteners, and stringers are fixed on horizontal shelves of flat-topped brackets.

EFFECT: possibility of use of stringers of the blade both as structural elements and magnetic conductors of the segment generator that provides simplification and reduction in cost of the design due to the use of the sailing fin assembly.

5 dwg

Wind motor // 2508468

FIELD: power industry.

SUBSTANCE: wind motor includes a horizontal shaft with a wheel with blades, which is installed on it. In addition, the wind wheel includes a conical air flow guide fixed on a wheel hub shell and an external shell. Blades of the second level are uniformly arranged on the external shell. Blades of the first level are attached to the wheel hub shell and to the conical guide. Generatrixes of blades of the first and the second levels are curved and have an ascending air flow attack angle.

EFFECT: improving efficiency.

5 dwg

Vane blade // 2499155

FIELD: power engineering.

SUBSTANCE: vane blade of a rotor wind engine, formed by side surfaces of the streamlined profile, connected by links so that one of them has length from the front edge to the zone of its maximum thickness, and the other one is a fully stretched contour of the hollow wing, having inside the front edge a longitudinal cavity between these side surfaces. The blade is made in the form of a sectioned wing of alternating sequence of the above surfaces turned mutually by 180 degrees in the open streamlined profile. In the front part of the wing this profile is formed by two bent sheet surfaces fixed on a "П"-shaped central wing spar and a connecting angle of the front edge of the wing, and its open sections are formed by the third sheet surface with transverse cuts that do not reach its rear edge, and partially closed by transverse links - half-ribs. Half-ribs provide for through air link between open parts of the third sheet surface fixed on rear edges of two longitudinal sheet surfaces at the central wing spar.

EFFECT: invention increases efficiency of wind usage.

3 cl, 7 dwg

Wind wheel // 2493428

FIELD: power engineering.

SUBSTANCE: wind wheel comprises a hub with radially attached blades. Each blade comprises a groove for placement of a photoelectric generator in it. The groove is made at one side of the blade. Grooves may be made at each side of the blade.

EFFECT: invention expands functional capabilities of a wind wheel and makes it possible to use it as a single wind and solar power plant.

3 cl, 7 dwg

Epoxy composition // 2542234

FIELD: chemistry.

SUBSTANCE: invention relates to the field of epoxy compositions, in particular fast hardening epoxy compositions, used as glues, and a binder for the production of composite materials. The epoxy composition includes, at least, one epoxy novolac resin, or epoxydiane resin, or their mixture, an aromatic amine hardener and a curing accelerator, as the latter, it contains urethane rubber of casting grades SKU PFL.

EFFECT: invention makes it possible to reduce the temperature of the composition hardening and accelerate the process of its curing.

2 tbl

FIELD: chemistry.

SUBSTANCE: adhesive composition contains a polymer component with glass transition point and/or glass transition point and melting point all equal to 40°C or lower. The polymer component has a backbone chain with an arbitrary structure, epoxy groups and sulphur-crosslinked centres. The polymer has number-average molecular weight of 150000-2000000.

EFFECT: invention enables to obtain an adhesive composition which provides strong bonding of a film with unvulcanised rubber, has flexibility and strength at low temperatures.

8 cl, 6 tbl, 30 ex

FIELD: chemistry.

SUBSTANCE: claimed invention relates to thermally hardened composition based on epoxy resins, which contains: (a) at least one epoxy resin A, which has on average more than one epoxy group per molecule; (b) at least one hardener B of opoxy resin, which is activated at increased temperature and represents amine, amide, anhydride of carboxylic acid or polyphenol; and (c) at least one accelerant C of formula (Ia) or (Ib), where R1 represents H or n-valent aliphatic, or araliphatic residue; R2 and R3 represent each independently on each other alkyl group; R1' represents n'-atom aliphatic residue; R2' represents alkyl group; R3' independently on each other represent H, or alkyl group, or aralkyl group; and n and n' - each has value from 1 to 4, in particular, 1 or 2; and d) at least one viscosity modifier D. Invention also relates to application of such composition in form of one-component thermally hardened glue, for obtaining coatings and for obtaining structural foam for reinforcement of cavities, as well as to method of gluing heat-resistant materials with application of composition by invention and to glued together/glued to product, thus obtained, and to vehicle or vehicle component, which contain such foamed product. Also described is application of accelerant of formula (Ia) or (Ib) for increasing viscosity of claimed compositions based on epoxy resins.

EFFECT: obtaining thermally hardened compositions based on epoxy resins, which have good stability in storage, are quickly hardened and have high impact strength.

26 cl, 2 tbl, 5 ex

FIELD: chemistry.

SUBSTANCE: described is use of 1,3-substituted imidazole salts of formula I wherein R1 and R3 independently denote a methyl, ethyl, n-propyl, isopropyl, n-butyl, dibutyl or tertbutyl group, R2, R4 and R5 independently denote a hydrogen atom or an alkyl group with 1-8 carbon atoms, wherein R4 and R5 can also form an aliphatic or aromatic ring, X is an anion selected from: cyanide, cyanate, anions of phthalic acid, isophthalic acid, oxalic acid, malonic acid, amber acid, glutaric acid, adipic acid, benzoic acid, phenylacetic acid, formic acid, acetic acid, acetoacetic acid, lactic acid, glycolic acid, glyoxalic acid and methyl mercaptoacetic acid, and n equals 1, 2 or 3. 1-ethyl-2,3-dimethyl imidazolium acetate and a complex of acetic acid with 1-ethyl-2,3-dimethyl imidazolium acetate as imidazolium salts are excluded, at temperatures below 175°C as latent catalysts for curing compositions containing epoxy compounds. Described is a curable composition which contains epoxy compounds and a latent catalyst of formula I, as described above, except 1-ethyl-2,3-dimethyl imidazolium acetate. The composition is cured at temperature below 175°C. Described is use of said curable composition as means of coating or saturating, as an adhesive, composite material, for producing moulded articles or as an injection compound for filling, joining or reinforcing moulded articles. Described is use of said curable composition to produce composite materials by curing pre-impregnated fibres or fibrous fabric or by extrusion, drawing, winding, and a technique for moulding by resin impregnation and a resin infusion technique.

EFFECT: use of said 1,3-substituted imidazolium salts of formula I at temperature below 175°C as latent catalysts for curing compositions containing epoxy compounds.

19 cl, 4 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: method of producing a sealed electronic module involves forming a housing with a vertical protrusion on the outer perimetre of the upper surface of the side walls of the housing, placing electronic components inside the housing, placing a cover on the housing, fixing said cover to the housing with screws, filling the working clearance between the cover and the housing with an epoxy resin-based adhesive composition and drying the module until the adhesive composition completely solidifies. The method involves formation of a cover with a bevel edge on the perimetre of the outer upper side and dimensions which enable the end face of the cover before the surface of the bevel edge to rest on the inner surface of the vertical protrusion with formation of a working clearance between the surface of the bevel edge and the inner surface of the vertical protrusion. After solidification of the adhesive composition, the surface of the solid adhesive composition is covered with a sublayer consisting of a mixture of polybutyl titanate, ethyl silicate-32 and white spirit, with the following ratio of components, pts.wt: polybutyl titanate 36-40, ethyl silicate-32 202-206, white spirit 756-760; and then held until complete evaporation of white spirit. The working clearance is then filled with an organosilicon sealant and dried until complete polymerisation thereof, wherein the epoxy resin-based adhesive composition contains modified K-139 epoxy resin, UP-0633M amine curing agent, boron nitride and chromium (III) oxide, with the following ratio of components, pts.wt: modified epoxy resin 594-596, amine curing agent 88-90, BN 296-300, Cr2O3 16-20.

EFFECT: sealed electronic module housing is obtained, which is suitable for protecting on-board radio electronic equipment from the destabilising effect of the environment for a long period of time.

2 cl, 2 dwg, 1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to epoxy resin-based adhesives and can be used to obtain a heat-conducting adhesive compound for gluing and sealing components made from glass, ceramic and metal, including aluminium alloys. The adhesive composition consists of the following, in pts.wt: modified K-139 epoxy resin 594-596, UP-0633M amine curing agent 88-90, boron nitride 296-300 and chromium (III) oxide 16-20.

EFFECT: obtaining an adhesive joint with improved physical and technical properties.

1 cl, 2 tbl

FIELD: chemistry.

SUBSTANCE: composition contains the following (pts.wt): polyester resin PN-1 100, a hardener - butanox M50 5, hardening accelerator - cobalt octoate in styrene 5, filler - pine saw-dust 35 and foamed polystyrene wastes (crumbs) 6.

EFFECT: invention enables to obtain a wood composite with low toxicity using industrial wastes, meant for heat insulation, having high operational properties.

1 dwg, 2 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: compound contains the following in pts.wt: organosilicon compound-modified epoxy resin in furylglycidyl ether SEDM-3R 100, hardener - product of reaction of formaldehyde and phenol with diethylene triamine aromatic diamine UD-583D 19-23 and filler - boron nitride (BN) with particles having an anisometric shape 30-65.

EFFECT: invention increases strength of the glue joint and its resistance to multiple thermal shocks.

2 tbl, 23 ex

FIELD: chemistry.

SUBSTANCE: fire-resistant adhesive substances and adhesive tape articles contain a halogen-free fireproofing composition containing a phosphinate or a phosphinate salt. The halogen-free fireproofing compositions can also contain additional materials such as a trihydrate of aluminium oxide and magnesium hydroxide which essentially do not contain halogenated compounds or materials.

EFFECT: invention provides flexibility and opaqueness of a tape article containing fireproofing compositions.

14 cl, 9 ex, 3 tbl

FIELD: chemistry.

SUBSTANCE: two-component adhesive composition consists of a base and an accelerator. The base contains epoxy resin, thiokol sealant paste, a plasticiser and a reinforcing filler. The accelerator contains an amine hardener, an oxidative component, a plasticiser and a finely dispersed thickener. The adhesive composition enables gluing different surfaces and enables their sticking and dismantling.

EFFECT: additional protection of glued surfaces from erosion and manufacture of detachable, composite articles and structures.

3 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: invention relates to non-aqueous hardening agents for epoxy resins, dispersed in water, a method of their obtaining, as well as to an epoxy resin composition, applied in paints, glues or coupling agents, obtained with the application of the said hardening agent. The composition of the hardening agent contains (a) the first amine adduct, (b) if necessary the second amine adduct, (c) a hydrophobic alkylamine or diamine, or hydrophobic hydrocarbon resin, or their combination, (d) a component, containing amino- or polyaminopolyalkyleneglycol fragments, aminosilane and (e) if necessary metal powder. The first amine adduct represents a product of a reaction between an intermediate with terminal amine groups and a monofunctional epoxy compound. The intermediate is obtained by a reaction between, at least, one polyamine or polyamidoamine, containing, at least, 3 active amine hydrogen atoms, and, at least, one epoxy resin with functionality, at least 1.5. The composition of paint or a coating contains a composition of epoxy resin with the said solidifying agent and zinc metal powder. A non-aqueous solidifying agent provides the viability of the binding agent, which constitutes several hours, and in the presence of a metal, such as zinc, nearly no formation of hydrogen is observed.

EFFECT: composition is stable in storage for several hours of the work viability, which makes it possible to obtain solidified coatings, demonstrating good exploitation characteristics.

13 cl, 7 tbl, 5 ex

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