Undercoating with long open time for polymer substrates
SUBSTANCE: invention relates to undercoating compositions containing at least one polyurethane prepolymer A with isocyanate groups; at least one aliphatic polyisocyanate B; at least one aromatic polyisocyanate C; at least one reaction product D, obtained from at least one epoxysilane and at least one aminosilane with quantitative ratio of atoms of active hydrogen of the amine to the number of epoxy groups of the epoxysilane equal to 3:1-1:3, or at least one epoxysilane and at least one mercaptosilane with quantitative ratio of mercapto groups to epoxy groups equal to 1.5:1-1:1.5, with content of product D equal to 0.5-15 wt % of the total weight of A+B+C+D. The invention also relates to use of the undercoating composition as an undercoating for adhesives, sealants and floor coatings.
EFFECT: good adhesion to problematic substrates with long open time.
24 cl, 2 tbl
The invention relates to a primer with large open sometimes, and with good adhesion to problematic polymer substrates.
Adhesives, coatings, sealants, flooring and other systems based on reactive binder. The adhesion of these reactive systems to different bases are often inadequate. Therefore, in the technique often used so-called "primer". Primer forms bridges adhesion between the substrate and the binder used. The primer is also a reactive system and is applied to the substrate. To form the adhesion of the primer with the base substrate, the primer should have a certain time, the so-called "drying time" for the formation of a film and at least partial solidification before can be applied adhesive or other reactive system. The use of such systems is limited, however, so-called "open time", during which she still provides adhesion to the primer. When exceeding the open time, adhesion to the primer is no longer guaranteed. Open time estimate empirically, while complying with different duration times between application of the primer and glue, and is determined by the adhesion adhesion after curing of the adhesive. Typically, the adhesion between the primer and glue or other reactive system on especially reaction between these materials. To ensure quick and efficient processing, the drying time in the industrial-technical application should be as small as possible. That is, the formation of the adhesion primer surface should be as fast as possible to as soon as possible to make application of glue or other reactive systems. However, problems arise because the production process is interrupted, for example, due to technical problems, the end of a shift or a weekend, so between applying the primer and adhesive or other reactive system may take a long time, several hours, days or even weeks. This is especially hampered in the case of continuously flowing industrial applications. Further, in the automotive industry there is a tendency for the storage at the stage of preliminary processing from industrial production lines to enterprises-supplier of intermediate goods, so that the open time between applying the primer on the enterprise-supplier and applying the glue to the stage of final production could be increased up to several weeks.
In order for these cases to ensure good adhesion requires priming with large open times.
Further, as substrates meet more synthetic materials. Synthetic materials used the SJ primarily due to the ease and lack of corrosion. However, synthetic materials are often problematic in terms of adhesion, for example, adhesives. Particularly it was shown for the one-component polyurethane adhesives for the materials of ABS (Acrylonitrile/butadiene/styrene), ESP (epoxy glass-reinforced plastics), polyester-SP (PEF-SP; polyester fiberglass), polymethylmethacrylate (PMMA), and polycarbonate (PC). Particularly problematic in this regard was PDMS PC and PDMS-PMMA. Speaking about these materials are polycarbonates, respectively, polymethylmethacrylate, which had a coating based on polydimethylsiloxane. PDMS PC and PDMS-PMMA have, on the one hand, the property of resistance to scratching, and on the other hand, they are very hydrophobic. Due to these properties, these substances are increasingly used in the automotive industry and shipbuilding. However, due to their hydrophobic nature of the application that require adhesion to a reactive system, such as glue, to the present time is limited.
Primers based on polyisocyanates are well known for a long time.
In U.S. patent 6153699 described primer, which in addition to the acrylate-modified silicone, contains a polyisocyanate. As the preferred MDI specified adducts of hexamethylenediisocyanate (GDI) and colordistance (TDI). This primer detects an especially good is th adhesion to polyvinyl chloride (PVC). However, trudnoiskorenyaemyh substrates, as PDMS PC, the adhesive strength is insufficient. In addition, primers based on polyacrylates and polyesters often have insufficient insufficient wettability and adhesion to plastic substrates, such as ABS and PC.
In U.S. patent 5576558 described primer for 40%- filled polypropylene or trudnoiskorenyaemyh automotive lacquers. Primer, except isocyanates, contains inorganic phosphate. Due to the applied fast-curing aromatic isocyanates this primer is not suitable for large open times, as used isocyanates quickly react with the moisture of the air.
In the application EP 1172424 A1 describes a primer for large open times and adhesion to glass and hard surfaces made of silicone. However, the exact nature of these solid coating of silicone is not described in detail. In addition to the acrylate resin, epoxy resin and carbon black primer contains a mixture of adducts of amino - and dialkoxy-/dialkoxybenzene. The product of the merger of the silane is present in very large numbers, 10-35% by weight of the primer. Such a large concentration required such primers to provide education clutch. However, the high concentration Milanovich products attach leads to the fact that this primer silane-based not suitable for polyuretha the new adhesives, because even for the formation of a sufficiently good adhesion with glass require a large number of alkoxysilane groups, which, however, then hatshepsuts during the hydrolysis with the formation of low molecular weight alcohols like ethanol or methanol. Educated primary alcohol reacts in turn with the isocyanate groups of the polyurethane adhesive, so that they are no longer available or to interact with primer or curing of the adhesive and thereby lead on the boundary surface primer/adhesive to insufficient mechanical properties of adhesive joints.
According to the prior art up to the present time, it was impossible to get a primer that had both good adhesion to the problematic polymer substrates and a large open time.
The present invention is to overcome the described disadvantages and problems primers for organic polymers and getting a primer, which also has good adhesion with problematic polymeric substrates and large open times. Unexpectedly shown that the disadvantages of the prior art can be overcome proposed according to the invention a composition for priming under paragraph 1. At the same time also ensures good adhesion with short drying times or at short times you is eriki between applying the primer and glue.
The present invention relates to a composition for a primer that contains at least one polyurethane prepolymer A with isocyanate groups, at least one aliphatic polyisocyanate B, at least one aromatic polyisocyanate C, and at least one reaction product D, which can be obtained from at least one of epoxysilane and at least one aminosilane or from at least one of epoxysilane and at least one mercaptoethane.
The method of carrying out the invention
The present invention relates to a composition for a primer that contains at least one polyurethane prepolymer A with isocyanate groups, at least one aliphatic polyisocyanate B, at least one aromatic polyisocyanate C, and at least one reaction product D, which can be obtained from at least one of epoxysilane and at least one aminosilane or from at least one of epoxysilane and at least one mercaptoethane.
"Polyhydric alcohol" and "polyisocyanate" means that the number of the relevant functional groups is 2 or more.
The polyurethane prepolymer A is obtained from at least one polyhydric alcohol and at least one MDI. The interaction of a polyhydric alcohol with isocyanates may occur due to the fact, what polyhydric alcohol and the polyisocyanate is introduced into the reaction by conventional means, for example, at a temperature of from 50 to 100°C, possibly in the presence of suitable catalysts and/or solvents that do not react at room temperature with isocyanates, and the polyisocyanate is used in stoichiometric excess. As reaction product formed polyurethane prepolymer A with isocyanate groups.
Polyhydric alcohols used to produce the prepolymer are those that are typically used in polyurethane chemistry. In addition to containing the hydroxyl group of the polyacrylates, polyethers, polycaprolactones and derived from PET (polyethylene terephthalate) PET polyols of particular interest as polyhydric alcohols are polyoxyalkylene, in particular polyoxypropyleneamine, preferably polyoxypropylene or trioli. Preferred polyoxyalkylene obtained by polymerization of ethylene oxide and/or 1,2-propyleneoxide. Molecular weight polyhydric alcohols is usually 250-20000 g/mol, preferably 500-10000 g/mol. Preferred are polyhydric alcohols with a molecular weight of 800-4000 g/mol. By "molecular weight" or "molar weight" is always understood srednevekovoi molecular weight Mw.
The polyisocyanate used for uretanovaja of prepolymer A, is an aromatic or aliphatic polyisocyanate. By "aromatic polyisocyanate" means a polyisocyanate whose isocyanate (=NCO-) group attached directly to the aromatic nucleus, preferably C6-cycle, and "aliphatic polyisocyanate" is a polyisocyanate, in which the NCO group is not directly on the aromatic nucleus. However, there are also polyisocyanates, in particular the products of interaction of the compounds as aliphatic and aromatic polyisocyanates, which are in the same molecule contain both aromatic and aliphatic NCO groups. Such molecules are referred here to aromatic and aliphatic polyisocyanates.
To obtain the polyurethane prepolymers A suitable, in particular, polyisocyanates from the following list:
2,4 - and 2,6-toluenediisocyanate (TDI) and any mixtures of these isomers; 4,4,-diphenylmethanediisocyanate (DHS), diphenylmethanediisocyanate isomers position; di - and tetraalkylammonium; 4,4,-dibenzoylresorcinol, 1,3 - and 1,4-delete the entry; isomers of naphthylenediisocyanate, xylylenediisocyanate, triphenyltetrazolium and their isomeric mixtures; Tris(p-isocyanatophenyl)thiophosphate (commercially available, for example under the name Desmodur RFE, firm Bayer);
hexamethylenediisocyanate (GDI), 2,2,4 - and 2,4,trimethyl,6-hexamethylenediisocyanate, tetramethoxysilane-1,4-diisocyanate, butane-1,4-diisocyanate, dicyclohexylmethane, cyclohexane-1,3 - and 1,4-diisocyanate, 1,12-dodecyltrimethoxysilane, the diisocyanate dimer fatty acids; diisocyanate methyl ester of lysine, 1-isocyanato-3,3,5-trimethyl-5-isocyanatomethyl (=isophorondiisocyanate or IPDI), hydrogenated diphenylmethanediisocyanate, hydrogenated 2,4 - and 2,6-toluylenediisocyanate;
oligo-, poly - or copolymers of these monomers, as polymer GDI, polymeric MDI, for example, commercially available as Voranat M-580 (Dow), or biuret, uretdione and isocyanurate these monomers, in particular biuret HDI, as, for example, commercially available Desmodur N-100 (Bayer), Luxate HDB 9000 (Lyondell), HDI trimer, as, for example, commercially available Desmodur N-3300 (Bayer), Desmodur N-3600 (Bayer), luxate HT 2000 (Lyondell), dimers of HDI, as, for example, commercially available Desmodur N 3400 (Bayer), luxate HD 100 (Lyondell), IPDI trimer, as, for example, commercially available Desmodur Z 4470 (Bayer), Vestanat T 1890/100 (Hüls), luxat IT 1070 (Lyondell), TDI trimer, as, for example, commercially available Desmodur IL (Bayer), TDI adducts, such as commercially available Desmodur L of Bayer), the polymer TDI/HDI, as, for example, commercially available Desmodur HL (Leverkusen), Polurene IK D (Sapici), Hartben 30 AM (Benasedo), polymeric MDI.
For primers, which should be applied in fields where the fire-resistance or fire protection, preferably use galogenidov the s polyisocyanates.
Composition for primers includes, in addition, at least one aliphatic polyisocyanate B. Preferably aliphatic polyisocyanates selected from the list of the polyisocyanates described above to obtain prepolymers A. Particularly preferred aliphatic isocyanurate B1 containing NCO-groups, or aliphatic biuret B2 containing NCO-groups. By "aliphatic containing NCO-groups" means that the NCO group is not directly on the aromatic nucleus. Preferably aliphatic isocyanurate B1 having NCO-groups are isocyanurate IPDI, as, for example, the IPDI trimer, where formally, each connected with three molecules of IPDI with the formation of isocyanurate, so formally remain free three NCO groups in the molecule.
Preferably aliphatic biurate B2 having NCO-groups are HDI-biuret, as, for example, HDI-biuret, which formally reacted with each other three molecules HDI education biureta, so formally remain free three NCO groups in the molecule.
In one particularly preferred embodiment, the composition for priming at the same time there is at least one isocyanurate B1 containing NCO-groups, and at least one aliphatic biuret B2 having NCO-groups.
Composition for primer includes, in addition, less is th least one aromatic polyisocyanate C. Preferably, aromatic polyisocyanates selected from the above list polyisocyanates to obtain prepolymers A. Particularly preferred aromatic isocyanurate having NCO-groups. By "aromatic, having NCO-groups" means that the NCO-group is directly on the aromatic nucleus. In particular, especially preferred aromatic isocyanurate having NCO-groups which are derived from colordistance and hexamethylenediisocyanate, as, for example, isocyanurate, which formally is formed from one molecule HDI and four molecules HDI education which two groups and four of the remaining aromatic NCO-groups.
Composition for primer includes, in addition, at least one reaction product D obtained from at least one of epoxysilane and at least one aminosilane or at least one of epoxysilane and at least one mercaptoethane. The term "epoxysilane" refers to a silane having an epoxy group, the term "aminosilane" refers to a silane, which contains amino groups, and the term "mercaptomerin" refers to a silane that contains mercaptopropyl.
Obtaining the reaction product D can be realized by the fact that epoxysilane result in reaction with aminosilanes or mercaptoethanol in the absence of moisture. While the ri response is necessary to draw attention to the fact, what used for number of reagents it is very important to the ratio between the number of active hydrogen atoms of amines or mercaptopropyl and the number of epoxy groups.
At the same time the product of the merger of aminosilane/epoxysilane the ratio of the number of atoms of active amine hydrogen to the number of epoxy groups is preferably in the range of 3:1-1:3. Preferably the ratio is 2:1-1:1,5. Especially preferably the ratio is from about 2:1 to about 1:1.
At the same time the product of the merger of mercaptoethane/epoxysilane the ratio of the number of mercaptopropyl to the number of epoxy groups preferably 1.5:1-1:1,5. Preferably, the ratio is 1.2:1-1:1,2. Especially preferred ratio is about 1:1, so that the reaction proceeds almost stoichiometric.
As epoxysilane to obtain the reaction product D is suitable primarily amoxicillinamoxicillin, amoxicillinamoxicillin or amoxicillinamoxicillin, in particular 3-goldilocksisableachblond, 2-(3,4-epoxycyclohexyl)ethylmethylketone. Preferred amoxicillinamoxicillin and amoxicillinamoxicillin, in particular 3-glycidylmethacrylate, 3-glycidylmethacrylate or 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane. The person is but the preferred 3-glycidylmethacrylate.
As mercaptoethane to obtain the reaction product D is an affordable 2-mercaptobenzoxazole, 3-mercaptoacetyltriglycine, 3-mercaptopropionylglycine, 3-mercaptopropionylglycine, 3-mercaptopropionylglycine, 3-mercaptopropionylglycine, 3-mercaptopropionylglycine, 3-mercaptopropionate, 3-mercaptopropionylglycine, preferably 3-mercaptopropyl-triethoxysilane, 3-mercaptopropionylglycine, in particular 3-mercaptopropionylglycine.
As aminosilanes to obtain the reaction product D is suitable, for example, iminodiacetonitrile, aminodimethylaniline, aminotrimethylene or aminotriazole. Suitable examples of aminosilanes are 3-aminoisobutyrate, 3-aminopropyltrimethoxysilane, bis(triethoxysilylpropyl)-amine, N-(2-amino-ethyl)-3-Amin-2-methylpropionitrile, N-(2-amino-ethyl)-3-aminopropyltrimethoxysilane, N-(2-amino-ethyl)aminomethylenemalonate, N-(n-butyl)-3-aminopropyltrimethoxysilane, N-methyl-3-aminopropyltrimethoxysilane, N-phenyl-3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, aminomethyltransferase, N-amino-ethyl-3-aminopropyltriethoxysilane, 3-aminopropyltriethoxysilane, 3-aminopropyltrimethoxysilane, 3-aminomethylation, N-(2-amino-ethyl)-3-AMI is propylmethyldimethoxysilane, N-amino-ethyl-3-aminopropyltrimethoxysilane or N-amino-ethyl-3-aminopropyltriethoxysilane.
Especially suitable trimethoxysilane with primary amino groups or triethoxysilane with primary amino groups. Particularly preferred 3-(2-aminoethylamino)propyltrimethoxysilane or 3-aminopropyltrimethoxysilane.
Especially preferably the reaction product D is obtained from 3-glycidylmethacrylate and 3-aminopropyltrimethoxysilane.
Thus, the amount of the reaction product D should be chosen so that the calculation on the total weight of A+B+C+D, the proportion was 0.5 to 15 wt.%, in particular 2-10 wt.%. When a smaller proportion of the adhesion is insufficient, and when a larger proportion of the composition for primer not sufficiently stable in storage.
According to one variant of implementation of the composition for primer contains additionally at least one solvent that is not reactive at room temperature with NCO. We are talking primarily about ketone, complex ether, simply ether, aliphatic hydrocarbons, aromatic hydrocarbons, halogenated hydrocarbons, as well as on N-alkyl-lactams.
As ketones are suitable primarily acetonylacetone, mesityloxide, cyclic ketones and dealkylation. Cyclic ketones with the magnitude of the cycle from 5 to 9 are particularly suitable as cyclic ketones, in particular ethylcyclohexane and cyclohexanone.
The preferred dialkylamino are ketones with (C1-C6)-alkyl substituents, and the alkyl substituents may be the same or different. Preferred acetone, Diisobutylene, diethylketone, DIPROPYLENE, methylmercaptan, methylethylketone, methyl propyl ketone, methyl ethyl ketone (MEK), n-hexillion.
As esters preferred alkilany ether carboxylic acid with a (C1-C6)-alkyl substituents, preferably acetates, in particular ethyl acetate, propyl, isopropylacetate, butyl acetate, isobutyl acetate, exilerated or amylacetate; butyrate, in particular isobutylether; propionate, in particular ethylpropane; formate, malonate, in particular diethylmalonate or diethylmalonate. Diethylmalonate and diethylmalonate, in addition, have a stabilizing effect on ORGANOTIN catalysts.
As ethers preferred etherketone, esters of afrocelt and dialkyl ethers with (C1-C6)-alkyl substituents, and the alkyl substituents may be the same or different, in particular diisopropyl ether, diethyl ether, disutility ether, diethyl ether of diethylene glycol, and diethyl ether of ethylene glycol.
As a simple ketoesters preferred acetylation ether, acetylmethadol and methylacetylene ether.<> As ethers, esters preferred acetate butyl ether of diethylene glycol, acetate, butyl ether of ethylene glycol, ethyl acetate ester of diethylene glycol, acetate ethyl ether of ethylene glycol, 3-methoxybutanol, acetate methyl ether of diethylene glycol, acetate methyl ether of ethylene glycol.
As aliphatic or aromatic hydrocarbons are suitable, for example, toluene, xylene, heptane, octane, and various petroleum fractions, as crude oil, white spirit, petroleum ether, gasoline, etc.
As the halogenated hydrocarbons are suitable, for example, methylene chloride, telengard, trichloroethylene, perchloroethylene, chloroform, atlanticare, Brabanthal, chlorobenzene, and dichlorobenzene.
As N-alkyl lactams are preferred N-organic (N-MP).
Particularly preferred solvent selected from the group comprising methyl ethyl ketone, acetone, ethyl acetate, butyl acetate, exilerated and diethylmalonate.
Next, the composition for primer may further comprise at least one catalyst for the reaction of isocyanate groups. This catalyst is preferably ORGANOTIN catalyst, in particular selected from the group of dibutyltindilaurate, dibutyltindilaurate, complex tin simple tiefer, mono-n-botello is trichloride, di-n-butylalcohol, di-n-butylenediamine, dibutylformamide. Examples of suitable Polovodovsky catalysts are Bi(II)-octoate, Bi(II)-neodecanoate, Zn(II)2-ethylhexanoate.
Advanced composition for primer can be added further adhesion promoters, in particular silanes. Preferably it is about the silanes selected from the group 3-glycidylmethacrylate, 3-goldilocksisableachblond, 2-(3,4-epoxycyclohexyl)-ethyltrimethoxysilane, 3-ureidopropionic, 3-(4,5-dihydroimidazole)propyltriethoxysilane, 3-methacryloxypropyltrimethoxysilane (Monomeric or polymerized), VINYLTRIMETHOXYSILANE (Monomeric or polymerized), vinyltriethoxysilane (Monomeric or polymerized), vinyltris(2 methoxyethoxy)silane (monomer or polymerized), 1,3,5-Tris[3-(trimethoxysilyl)propyl]-1,3,5-triazine-2,4,6(1H,3H,5H)-triona, methyltrimethoxysilane, methyltriethoxysilane, trimethoxypropylsilane, triethoxypropane, 2-methylpropionitrile, triethoxyoctylsilane, octyltrimethoxysilane, octyltriethoxysilane, hexadecyltrichlorosilane, cyclohexyldimethylamine, 3-isocyanatopropyltrimethoxysilane, 3-isocyanatopropyltrimethoxysilane, 3-methacryloxypropyltrimethoxysilane (Monomeric or polimerizovannaja is). Particularly preferred 3-glycidylmethacrylate and 3-glycidylmethacrylate.
Further, in the chemical composition of the primer may include conventional fillers and additives. Non-limiting examples of the type are silicic acid, talc, carbon black, stabilizers, bentonite, chemical and physical dryers.
The described composition is prepared and stored in the absence of moisture.
Composition for primer suitable as primers for various substrates. It is particularly suitable for glass, ceramics, metals and alloys, as well as various plastics. As the preferred plastics should be called, in particular, ABS, PVC, PES-SP, ESP, PMMA, PC, PDMS PC, PDMS-PMMA, and varnishes. Composition for primer according to the invention is particularly well suited for PDMS PC or PDMS-PMMA as substrates. Various substrates before application preferably pre-processed. Such methods of pre-treatment include physical and/or chemical pre-treatment, such as grinding, sandblasting, brushing or the like, or treatment with cleaners, solvents, adhesion promoters, solvents adhesion promoters.
Primer is applied on a substrate-the substrate using a brush, felt, cloth or sponge. This application can PR is to proceed manually or automatically, in particular with the help of a robot. Hereinafter, may be applied to several layers of a composition for priming.
Composition for primer preferably used as a primer for adhesives, sealants or floor coverings, in particular for one-component moisture curing polyurethane adhesives or sealants based on polyurethane or combinations of polyurethane and silane. Preferred fields of application of this primer are areas where glued also manufactured components. It is, in particular, applications where the primer is applied at the enterprise-supplier of intermediate products.
The following examples are typical examples illustrating the invention.
Obtaining prepolymer PREP1
Using a 5-necked glass apparatus equipped with a stirrer, actuated by the motor, the supply of N2, temperature probe, reflux condenser and addition funnel. All the following reactions were carried out in nitrogen atmosphere.
531,6 g Desmodur HL was dissolved in 212,1 g of methyl ethyl ketone. After a light heat to the solution of the isocyanate was slowly bury via an addition funnel a 44.2 g of Voranol P-1010 (polypropylenglycol, average molecular weight 1000 g/mol, Dow), dissolved in 212,1 g MEK. After the addition was stirred for another 5 hours. OK nanie reaction was determined by measuring the concentration of NCO.
Primers PR1-PR8 was obtained according to the compositions shown in table 1.
Obtaining carried out as follows: preparing the prepolymer, and then optionally added aliphatic isocyanate and stood before its dissolution. Then, if necessary, added aliphatic biuret, and possibly aliphatic isocyanurate. Then through hose pump slowly dropwise added to the product connection (adduct) AD1 3-aminopropyltrimethoxysilane and 3-glycidylmethacrylate (molar ratio=1:3). Finally, another solution was diluted with MEK, as shown in table 1.
Table 1. Examples of compositions
|The prepolymer PREP1 [g]||800||800||800||800||800||800||800||800|
|Desmodur N-100 [g]||0||420||0||130||0||420||0||130|
|Vestanat T1890/100 [g]||0||0||0||100||0||0||0||100|
|Desmodur HL [y]||0||0||420||190||0||0||420||190|
|Adduct AD1 of epoxysilane|
and aminosilane [g]
Preparation meanly the EC and varnishing
|ABS||the firm Rocholl, Schonbrunn, Germany|
|ESP||the firm Rocholl, Schonbrunn, Germany|
|PC||the firm Rocholl, Schonbrunn, Germany|
|PDMS-PC||the firm Angst+Pfister, Zurich, Switzerland|
The substrate was cleaned with isopropanol. If PDMS-PC surface is first activated by the activator Sika® (manufactured by Sika Schweiz AG) using a tissue. After standing for 10 minutes was applied the first coat.
Adhesive application and test methods
After keeping within time t, defined in table 2, for applying the primer to the primer was applied polyurethane adhesive. It is about 5 SikaTack®-ultrafast (manufactured by Sika Schweiz AG), and also provides®-250 DM-1 (manufactured by Sika Schweiz AG). The adhesive was tested after 7 days of curing in air-air (23°C, relative humidity 50%).
The adhesion was tested using test method for vertical cuts. Thus did the cut on the end on the adhesive surface. Notched edge of the bar glue kept what nose pliers and pulled from the ground. This was carried out by careful winding column on the tips of the forceps, as well as installation of cuts vertically to the direction of extrusion of the column to clean the base. The speed of extrusion of the column should be chosen so as to approximately every 3 seconds needed to make one incision. Site inspections must meet at least 8 see also Appreciate the adhesive remaining on the substrate after the extrusion of the column (cohesive rupture). Evaluation of the characteristics of adhesion is carried out by the determination of the cohesive fraction of the surface of the clutch:
1=>95% cohesive rupture,
2=75-95% cohesive rupture,
3=25-75% cohesive rupture,
4=<25% cohesive rupture,
PostScript "P" indicates that the primer is separated from the substrate, and therefore, the adhesion of the primer to the substrate is the bottleneck. The test results with cohesive rupture less than 75% are considered poor.
Table 2 shows the results of tests on adhesion for examples PR1-PR8. On the one hand, this table presents the results for adhesion in relation to some problematic substrates, and especially at the small and large time delay between application of the primer and glue.
The results of the s in adhesion to the problematic polymer substrates at different exposure times t between applying gotowka and glue
|Small exposure times|
|ESP (t=10 min)|
|PC (t=10 min)|
|PDMS-PC (t=10 min)|
|Large exposure times|
|ESP (t=17 days)|
|PC (t=12 days)|
|PDMS-PC (t=12 days)|
From table 2 it is clear that the example PR8 as a composition for a primer according to the invention at all problematic substrates, in particular PDMS-PC and PC, as compared with comparative example always shows excellent adhesion. Especially when this comparison should pay attention to the influence of large open times of the compositions according to the invention. However, it turns out that at low exposure times good adhesion is detected and in the case of comparative examples, as PR4 and PR5, but for longer times, this is no longer observed Good adhesion at high exposure times can only be achieved with the compositions according to the invention, as shown in the example PR8.
1. Composition for primer, including
at least one polyurethane prepolymer And isocyanate groups;
at least one aliphatic polyisocyanate;
at least one aromatic polyisocyanate;
at least one reaction product D obtained from at least one of epoxysilane and at least one aminosilane when the number ratio of atoms of active amine hydrogen and the number of epoxy groups of epoxysilane equal to 3:1-1:3, or from at least one of epoxysilane and at least one mercaptoethane when the proportion of mercaptopropyl and epoxy groups of 1.5:1-1:1,5, when the content of the product D of 0.5-15%, based on the total weight of A+B+C+D.
2. Composition for primer according to claim 1, characterized in that the polyurethane prepolymer As obtained from at least one polyhydric alcohol and at least one MDI.
3. Composition for primer according to claim 2, wherein the polyhydric alcohol is polyoxyethyleneglycol.
4. Composition for primer according to claim 3, wherein the polyhydric alcohol is polyoxypropyleneglycol, in particular Polyoxypropylenediamine or-triol.
5. Composition for primer according to claim 3, wherein the polyhydric alcohol has a molecular weight of 250-20000 g/mol, h the particular 500-10000 g/mol, preferably 800-4000 g/mol.
6. Composition for primer according to claim 1, characterized in that the aliphatic polyisocyanate is aliphatic isocyanurates B1 containing NCO-groups and/or aliphatic bureta B2 containing NCO-groups.
7. Composition for primer according to claim 6, characterized in that the aliphatic isocyanurate B1 containing NCO-groups is IFDI-isocyanurate.
8. Composition for primer according to claim 6, characterized in that the aliphatic biuret B2 containing NCO-groups is GDI-bureta.
9. Composition for primer according to claim 1, wherein the aromatic polyisocyanate is aromatic isocyanurates containing NCO-groups.
10. Composition for primer according to claim 9, wherein the aromatic polyisocyanate is aromatic isocyanurates containing NCO-groups, which can be obtained from colordistance and hexamethylenediisocyanate.
11. Composition for primer according to claim 1, characterized in that epoxies used to obtain the reaction product D is amoxicillinamoxicillin, amoxicillinamoxicillin or amoxicillinamoxicillin, preferably 2-(3,4-epoxycyclohexyl)-ethyltrimethoxysilane, 3-glycidylmethacrylate or 3-glycidylmethacrylate, in particular 3-glycidylmethacrylate.
12. Compo is ice for primer according to one of claims 1 to 11, wherein aminosilane used to obtain the reaction product D is iminodiacetonitrile, aminodimethylaniline, aminotrimethylene or aminotriazole, in particular, trimethoxysilane with primary amino groups or, in particular, triethoxysilane with primary amino groups, preferably 3-(2-aminoethylamino)-propyltrimethoxysilane or 3-aminopropyltrimethoxysilane.
13. Composition for primer according to one of claims 1 to 11, characterized in that the reaction product D obtained from 3-glycidylmethacrylate and 3-aminopropyltrimethoxysilane.
14. Composition for primer according to one of claims 1 to 11, characterized in that for obtaining the reaction product D epoxysilane and aminosilane used in the quantitative ratio of the active hydrogen atoms of amine and epoxy groups is 3:1-1:3, in particular 2:1-1:1.5 times, preferably 2:1 to about 1:1.
15. Composition for primer according to one of claims 1 to 11, characterized in that for obtaining the reaction product D epoxysilane and mercaptomerin used in the quantitative ratio mercaptopropyl and epoxy groups, equal to 1.5:1-1:1.5, in particular of 1.2:1-1:1,2, preferably about 1:1.
16. Composition for primer according to one of claims 1 to 11, characterized in that it further includes at least one solvent that is not reactive and is ocyanate at room temperature.
17. Composition for priming in item 16, characterized in that the solvent is dialkylamino or alkilany ether carboxylic acid with a (C1-C6)-alkyl substituents.
18. Composition for a primer on 17, wherein the solvent is selected from the group comprising methyl ethyl ketone, acetone, ethyl acetate, butyl acetate, exilerated and diethylmalonate.
19. Composition for primer according to one of claims 1 to 11, characterized in that it further includes at least one catalyst, preferably ORGANOTIN catalyst, in particular selected from the group consisting of dibutyltindilaurate, dibutyltindilaurate, complex tin-complex tiefer, mono-n-botillo-trichloride, di-n-botroloanasse, di-n-butyrolactam, dibutylbarbituric.
20. Composition for primer according to one of claims 1 to 11, characterized in that it further includes at least one silane selected from the group comprising 3-glycidylmethacrylate, 3-glycidylmethacrylate-sicilan, 2-(3,4-epoxycyclohexyl)-ethyltrimethoxysilane, 3-ureidopropionic, 3-(4,5-dihydroimidazole)-propyltriethoxysilane, 3-methacryloxypropyltrimethoxysilane (Monomeric or polymerized), VINYLTRIMETHOXYSILANE (Monomeric or polymerized), vinyltriethoxysilane (Monomeric or polymerized), vinyltris-methoxyethoxy)silane (monomer or polymerized), 1,3,5-Tris[3-(trimethoxysilyl)propyl]-1,3,5-triazine-2,4,6(1H,3H,5H)-Trion, methyltrimethoxysilane, methyltriethoxysilane, trimethoxypropylsilane, triethoxypropane, 2-methylpropionitrile, triethoxyoctylsilane, octyltrimethoxysilane, octyltriethoxysilane, hexadecyltrimethylammonium, cyclohexyldimethylamine, 3-isocyanatopropyltrimethoxysilane, 3-isocyanatopropyltrimethoxysilane, 3-methacryloxypropyltrimethoxysilane (Monomeric or polymerized), in particular 3-glycidylmethacrylate and 3-glycidylmethacrylate.
21. Composition for primer according to one of claims 1 to 11, characterized in that it includes at least one filler, in particular soot.
22. The use of a composition for a primer according to one of claims 1 to 21 as a primer for adhesives, sealants or floor coverings, in particular one-component moisture curing polyurethane adhesives or sealants based on polyurethane or combinations of polyurethanes and silanes.
23. The method of applying the composition for a primer according to one of claims 1 to 21, namely, that the composition applied to the substrate with a brush, felt, cloth or sponge manually or automatically, in particular, with the help of a robot.
24. The method according to item 23, wherein the substrate is glass, glass ceramic or plastic, in particular, polytime isilox-polycarbonate (PDMS-PC) or polydimethylsiloxane-poly (PDMS-PMMA).
SUBSTANCE: sealant has temperature of treatment in the range from more than 70°C to 220°C, includes the following components, wt %: butyl rubber or polyisobutyl rubber - 5-65, pigment - 10-70, glueing activator - 0.25-2.5, plasticiser - 0-30, resin increasing stickiness - 10-40. Shell around specified composition of sealant is made of thermoplastic polymer material and makes not more than 10 wt % of overall mass of sealant, and specified polymer material has minimum temperature of film formation of at least 50°C and temperature of softening, which is less than working temperature for application of specified composition of sealant for the value of more than 10°C.
EFFECT: proposed briquetted product is ecologically compatible and at the same time preserves proper short-term and long-term properties.
12 cl, 3 ex
SUBSTANCE: two-component composition of adhesion promotor contains first component K1 including at least one organoalkoxysilane S and at least one dehydrated surfactant T, and second component K2 including water and at least one acid, with acid taken in amount providing acid reaction at pH 3-5 in the mix obtained from K1 and K2 components.
EFFECT: simplified composition preparation, improved adhesion with composition stability preserved.
27 cl, 7 dwg, 12 tbl
SUBSTANCE: invention relates to multilayer sealing material used in aerospace industry. Sealing material contains first, second and intermediate sealing layers. The intermediate layer lies between the first and second sealing layers and is deposited from a composition which contains a polymer mixture from at least one polysulphide component (i) and at least one polythioether component (ii). In the sealing material, either the first or the second sealing layer is based on using chemical properties of polysulphide, and the other is based on using chemical properties of polythioether. In the polysulphide component, one polysulphide polymer has molecular weight of 1000 and one polysulphide polymer has molecular weight of 4000.
EFFECT: increased adhesion of layers of the sealing material, faster hardening and longer life.
21 cl, 2 tbl, 1 ex
SUBSTANCE: invention relates to seals designed for repairing pneumatic tyres of any vehicle. Described is a liquid seal for tyres of vehicles which is a suspension in which the liquid phase consists of glycerin and a water-soluble organic polymer, and the solid phase contains an inorganic silicate. The organic water-soluble polymer used is an aqueous solution of KMT Burovoy glue, whose volume ratio to glycerin in the liquid phase equals 0.3:1. The silicate used is aerosil or crushed expanded clay with particle size not greater than 0.5 mm. The seal has density of 1200-1300 kg/m3. Quantitative content of initial components in the seal is as follows, in wt %: glycerin - 73-74, KMT Burovoy glue - 0.4, water - 19-20, aerosol 4-5, expanded clay 3-4.
EFFECT: seal enables to seal punctures of up to 8 mm.
1 tbl, 1 ex
SUBSTANCE: invention relates to preparation of epoxide compositions meant for adhesive, priming, sealing and repair cold setting mixtures. Described is an epoxide composition containing the following (pts. wt): epoxide diane resin -100, low-molecular rubber - urethane prepolymer SKU-PFL-100 with weight fraction of isocyanate groups in the range of 5.3-6.4 % - 3.5-15, plasticiser - EDOS which is a mixture of dioxane alcohols and their high-boiling esters - 1.2-8.0, carbon nanomaterial - fullerenes C2n, where n is not less than 30, or their mixture - 0.15-1.25, polyethylene polyamine hardener 13.5-26.5.
EFFECT: epoxide composition provides good, stable physical and mechanical, adhesion and processing properties with a short preparation process at room temperature.
1 cl, 2 tbl, 4 ex
SUBSTANCE: composition contains the following in pts. wt: 100 - triglyceride 12-hydroxy-cis-9 octadecenic acid (technical product of castor oil), 38.0-30.0 - toluene diisocyanate isomers, 2.7-30.0 - diethyleneglycol urethane and 0.1-1.0 - product of co-hydrolysis of methyltrichlorosilane with dimethyldichlorosilane. The sealant made from the proposed composition has low acoustic impedance.
EFFECT: improved electrophysical properties of sensors, resistance of hydroacoustic sensors sealed with the said sealant to effect of hydrostatic pressure of 10 MPa, which enables use of the sensors at up to 1000 m under water.
6 ex, 1 tbl
SUBSTANCE: plastisol composition based on polyvinyl chloride emulsion is meant for sealing inner and outer welded joints of carriage bodies and cabins, depositing coatings at the bottom and other metallic components of automobile equipment with the aim of their anticorrosion treatment, vibro- and noise insulation. The plastisol composition contains polyvinyl chloride emulsion, dioctylphthalate, chalk, dibasic lead phthalate, orgnobentonite, modified calcium oxide, an adhesive - polyaminoamide Euretek 545 or 505 and, if necessary, kaolin, graphite and white spirit.
EFFECT: improved adhesion to metal which improves operational quality of the plastisol composition.
SUBSTANCE: invention relates to an anaerobic sealing composition based on (meth)acrylic monomers, used as sealer for components made from aluminium alloys, steel and cast iron, for example when making car engines. This composition consists of the following components, pts. wt: 100 - reactive mixture 28 to 96 pts. wt of one or more methacrylic monomers and 72 to 4 pts. wt urethane acrylate, 4.0 to 11.5 - initiator, 0.025 to 0.1 - inhibitor and 6.7 to 87.5 - functional additives. The urethane acrylate contained in the composition is a product of reacting oligodiol, 2,4-toluene diisocyanate, hydroxyl-containing (meth)acrylate and water in molar ratio of (1-8):2:(2-9):(0.001-0.1) respectively, and the functional additives are in form of filler, thickeners, plasticisers, dyes and other substances.
EFFECT: anaerobic composition has high rate of hardening, good adhesion and cohesion properties, which improves airtightness of flange coupling.
17 ex, 1 tbl
FIELD: machine building.
SUBSTANCE: invention refers to general machine building, particularly to connection of parts and structure elements of railroad ways operating under vibration. The method of fabrication of bolt connection mainly under vibration conditions consists in applying material in form of anaerobic sealant, for example grade "Unifix P1", on a threaded part of bolt connection. Anaerobic sealant is applied on threaded surface so, as to fill recesses of thread. An applied layer of anaerobic sealant is levelled by run of a nut. Upon this operation the nut is screwed with torque equal to 150-200 Hm and conditioned within 20-30 min for solidifying of anaerobic sealant. An activator, for example, K101M, is additionally applied on threaded surface, when bolt connection operates under negative temperatures of ambient air.
EFFECT: upgraded corrosion resistance of connection and prevention of unscrewing of bolt connection.
FIELD: process engineering, aircraft engineering.
SUBSTANCE: invention relates to sealing compounds, particularly to sealing lower-density compound intended for sealing various assembly units and parts of aircraft structures (airframe, fuel tanks, etc.) operated in wide temperature range from -60°C to +130°C. Proposed compound comprises the following elements, weight parts, i.e. fluid thiokol - 100, adhesive additive - 6-14, carbon - 18 to 28, dibutyl phthalate - 3.2 to 6.5, melaniline - 0.9 to 1.05, manganese dioxide - 5.6 to 7.0, microspheres - 8 to 18, stearic acid - 0.028 to 0.38 and colophonium - 1 to 3.
EFFECT: higher tensile strength and heat resistance, longer life.
2 tbl, 1 ex
SUBSTANCE: invention relates to a polyurethane adhesive composition which can be used for gluing materials, concrete, leather, wood etc. The composition contains the following in pts. wt: 20-60 moulding polyurethane or wastes from production of moulding polyurethane, 80-40 ε-caprolactam, 5-50 isocyanate and 100-300 organic polar solvent.
EFFECT: composition increases adhesion strength of substrates, has low cost due to use of readily available and cheaper components, as well as reduced pollution of the environment due to recycling of wastes from production of moulding polyurethane.
5 ex, 1 tbl
SUBSTANCE: said dispersions contain ionic or potentially ionic and nonionic groups. Ionic or potentially ionic groups are entered into a polymer skeleton through a difunctional polyol component whose molecule also contains 0.5-2 moles of sulpho-acid or sulphonate groups, while nonionic groups are entered through one or more compounds which are monofunctional in polyaddition reactions of isocyanates, containing at least 50 wt % ethylene oxide and having molecular weight of at least 400 Da. The dispersions also contain 0.1-7.5 wt % emulsifying agent which is not chemically bonded with the polymer, where the said emulsifying agent is nonionic, liquid at room temperature and has hydrophilic-lipophilic balance ranging from 12 to 18.
EFFECT: proposed aqueous polyurethane dispersions are characterised by low activation temperature, high initial heat resistance, high thermal stability and excellent adhesion to different bases.
3 cl, 4 ex, 1 tbl
SUBSTANCE: invention relates to a composition which is used in rocket engineering, particularly for attaching solid-propellant charge to the rocket casing. The adhesive composition contains, pts. wt: 9.0 to 14.0 urethane rubber SUREL-9, 1.0 to 2.0 hardener TON-2, 60.0 to 70.0 solvent - ethyl acetate and, additionally, 4.0 to 9.0 nongranular technical carbon and 8.0 to 12.0 dibutyl phthalate. Solid propellant contains an oxidising agent, fuel, synthetic rubber-based binder which his plasticised with nitroglycerin, curing additives and catalysts.
EFFECT: proposed adhesive composition prevents diffusion of plasticiser from fuel contact layers, that way providing for excellent physical and mechanical properties, as well as adhesion properties during prolonged storage.
4 ex, 8 tbl, 1 dwg
SUBSTANCE: water dispersion contains polyurethane dispersion and water dispersion of silicon dioxide. Polyurethane dispersion has the average size particle of polyurethane polymer in the range from 60 to 350 nm. The water dispersion of silicon dioxide has SiO2 particles diametre from 20 to 400 nm. Polymer dispersions are used as glues for gluing of any substrates same or different type.
EFFECT: high initial thermal durability of glue joints.
9 cl, 15 ex, 6 tbl
FIELD: textiles; paper.
SUBSTANCE: invention relates to producing water-soluble melt adhesive, which can be widely used in cardboard and paper industry for gluing and laminating cardboard, as well as for making joints of not less than two layers of paper, used for making toilet paper. The water-soluble melt adhesive contains 40-70 wt.% of not less than one homopolymer or copolymer with free carboxylate groups based on monomers with unsaturated ethylene bonds (component A), 15-45 wt % of not less than one water-soluble or polyurethane dispersed in water (component B), 12-35 wt % of not less than one alkanolamine (component C) and 0-20 wt % target additives.
EFFECT: obtained melt adhesives have high viscosity, elasticity and high strength of adhesive bonds on packages at low temperatures during storage of products, and at high temperatures the adhesive does not soften and does not flow.
11 cl, 1 tbl, 3 ex
FIELD: technological processes, chemistry.
SUBSTANCE: invention is related to compositions used for binding of glass or plastic with the help of polyurethane adhesive. Technical task - development of composition that makes system together with polyurethane adhesive for durable connection of glass or plastic with structure. Composition is suggested, which contains a) one or several organic compounds - titanates having four ligands, where ligands represent hydrocarbyl, which may not contain one or several functional groups, having one or several heteroatoms selected from group that includes oxygen, nitrogen, phosphorous and sulfur, where two or more ligands may create cyclic structure; b) one or several mercapto silanes; c) one or several polyaminosilanes; d) one or several secondary aminosilanes and e) dissolvent that dissolves composition components. Also system is suggested for binding of glass with substrate, which includes suggested composition and adhesive comprising isocyanate functional polymer and catalyst for hardening of isocyanate functional prepolymer.
EFFECT: system may be used in automobile industry for window fixation to vehicle.
10 cl, 5 tbl, 24 ex
SUBSTANCE: hydropyle blocked polyisocyanates are produced by the method wherein: A) one or the several organic polyisocyanates interact with B) one or several organic compounds, containing, at least, one isocyanate reactive group and comprising b1) non-ionic hydropyle groups based on simple poly-alkylenoxide-polyethers containing at least 30 wt % of ethylene-oxide links, and/or b2) ionic or potentially ionic hydropyle groups a forming dissociation equilibrium depending upon pH in interaction with water, and, depending upon pH not having a charge and being charged positively or negatively, or interact with C) one or several blocking means containing, at least, one cyclic ketone with CH-acidity of the general formula (2) where X is the electron-acceptor group, R1, R2 mean independently from each other the hydrogen atom, saturated or unsaturated aliphatic residual containing up to 12 carbon atoms, n is 1, and, if necessary, interacting with one or several (cyclic)aliphatic mono- or polyamines with the amount of amino groups in a molecule of 1 to 4 and molecular weight of up to 400 note that, if necessary, it interacts with one or several multinuclear spirits with the number of hydroxyl groups in a molecule from 1 to 4 and molecular weight of up to 400, and, if necessary, with amino spirits in the presence D) of one or several catalysts or, if necessary, with auxiliary substances and additives and, if necessary E), with solvents. Polyisocyanates can be used for manufacturing varnishes, coatings, sizes, glues and molded products.
EFFECT: improved method of producing hydropyle blocked polyisocyanates.
6 cl, 6 ex
FIELD: compositions for coats.
SUBSTANCE: proposed composition includes heterocyclic silicon compound containing at least one alcohol-orthosilicate group and cross-linking agent interacting with hydroxylic groups. Proposed composition has low content of volatile organic solvents and is hardened at temperature of 5°C ; hardened composition contains no unreacted low-molecular blocking agents which are likely to evolve into surrounding atmosphere at hardening or during operation. Besides that, ratio of life to time to drying time is favorable. Proposed composition may be used for finishing and secondary finishing of automobiles and large transport facilities; it may be also used as an adhesive.
EFFECT: enhanced efficiency.
14 cl, 4 tbl
FIELD: polymerization processes.
SUBSTANCE: invention relates to two-component composition used to initiate curing of one or more polymerizable monomers that are cured when affected by free radicals, which composition consists of organoborane-amino complex and an isocyanate capable of destroying organoborane-amino complex, wherein equivalent ratio of amine nitrogen atoms to boron atoms ranges from more than 4.0:1 to 20.0:1. In another embodiment of invention, subject of invention is two-component composition for use as sealing materials, coatings, primers for modifying polymer surfaces, and as molded resins, which composition consists of component 1: organoborane-amino complex wherein ratio of amine nitrogen atoms to boron atoms ranges from more than 4.0:1 to 20.0:1; component 2: one or more monomers, oligomers, or polymers having olefinic instauration, which are able of being subjected to free-radical polymerization; and effective amount of an isocyanate, which can initiate dissociation of complex to free borane for initiation of polymerization of one or more monomers, oligomers, or polymers having olefinic instauration, provided that complex dissociation initiator is stored separately from complex until initiation of polymerization becomes desirable. Such compositions are handling safe, i.e. they are not self-inflammable, stable at or near ambient temperature and so they do not initiate polymerization at or near ambient temperature in absence of complex dissociation initiator. Polymerized composition show good cohesion and adhesion strength. Described are polymerizable composition polymerization process, method of gluing two or more substrates using polymerizable composition; method of modifying polymer surface having low surface energy using polymerizable composition, as well as coating and laminate containing polymerizable composition.
EFFECT: enlarged resource of polymerizable compositions and expanded application areas thereof.
10 cl, 2 dwg, 4 tbl
FIELD: building materials.
SUBSTANCE: invention relates to a hardening composition used in building industry. The composition comprising a polymer with two or more thiol groups per a molecule, compound with two or more isocyanate groups per a molecule, carbon black and calcium carbonate involves additionally a filling agent wherein silicic acid or silicate is the main component or organic filling agent wherein ground powdered carbon as the main component. The composition shows satisfactory stability in storing the basic compound and the hardening capacity even after storing the basic compound and, except for, it forms the hardened join with sufficient rupture strength limit, hardness and properties of barrier for gas. The composition comprises a hydrocarbon plasticizer and an organometallic compound preferably that provides highly effective hardening properties in combination with higher mechanical strength and properties of barrier for gas. Proposed hardening composition can be used as sealing material in manufacturing isolating glasses, frames, windows for transportation means, glues and covers.
EFFECT: improved and valuable technical properties of composition.
9 cl, 12 tbl, 11 ex
SUBSTANCE: invention relates to polymer construction compositions and can be used for making sports coatings. The coating is formed by depositing a composition onto a hard base, where the composition contains an isocyanate prepolymer, a mixture of chalk and caustic lime in ratio of 5:1, a mixture of chlorinated paraffin wax, low-molecular polyethylene and calcium oxide in ratio of 1:2:0.5, a catalyst, low-molecular tri-functional alcohol, chlorinated paraffin wax, plasticiser and holding for 20-24 hours. A second layer is deposited, based on a polymer composition which contains oligodienediol with molecular weight of 2000-5000 and 0.7-1.7% content of hydroxyl groups, a plasticiser, mineral filler, a mixture of chlorinated paraffin wax, low-molecular polyethylene and calcium oxide in ratio of 1:2:0.5, low-molecular tri-functional alcohol, polyisocyanate, catalyst, 2,4,6-tri-tertbutylphenol, ethyl silicate and kept for 20-24 hours again. A third layer of polymer composition is deposited, which contains a polysulphide oligomer, a plasticiser, zinc oxide, rubber crumbs with particle size of 3 mm and 1 mm in ratio of 3:1, vulcanising paste No.9, diphenylguanidine and subsequently held for 20-24 hours.
EFFECT: improved dynamic and elastic-hysteresis properties, hydrolytic and thermal oxidative stability of the coating.