Protective-adhesive lacquer for inhibiting solid-propellant charge
SUBSTANCE: invention relates to rocket engineering, particularly to production of a protective-adhesive lacquer which is used as a primer for binding an inhibiting coating with the surface of the charge when inhibiting solid-propellant charge. The protective-adhesive lacquer contains 4,4',4"-triphenylmethane triisocyanate, dichloroethane, as an adhesive additive - a product of polycondensation of ethylene glycol, adipic acid and glycerine, with content of hydroxyl groups from 2.00 to 2.30 wt % and dibutyltin dilaurate as a curing agent.
EFFECT: obtaining lacquer with high capacity for protection from migration processes in the "fuel-inhibiting coating" system, which reduces smoke formation, increases adhesion strength between the inhibiting coating and the surface of the propellant charge, which contains polyformaldehyde derivative-based components, avoids use of an additional cellulose acetate-based primer, which ensures strong adhesion of solid-propellant charge pellets with the inhibiting coating for the guaranteed storage life of the charge and which enables to use readily available domestic raw materials.
The invention relates to the field of rocket technology, namely the development of a protective and adhesive lacquer to ensure a lasting bond Bonaparte with the surface of the fuel pieces and can be used in the development and manufacture of a charge of solid propellant (TRT).
Design supplementary charges from ballistic solid fuels, armored on certain surfaces, widely used in rocket technology, particularly for engines of active-reactive systems (ARS), anti-tank guided missiles (pturs) and other
The creation of precision-guided missiles, including the most modern methods of targeting (laser and beam) is complicated by the low reliability of the transmission of commands on Board the projectile in the presence of significant smoke route of flight.
The main sources of smoke at work managed rockets are products of combustion of solid rocket fuel and Bonaparte.
Currently booking charges ptors and ARS are widely used Bonaparte on the basis of cellulose acetate having a low power smoke. During long-term storage charges due to migration of plasticizer - nitroglycerin in Bonaparte decreases thermal stability of ultrafine cellulose acetate Bonaparte, the zoom is by the power of smoke, there is a change in the chemical composition of the fuel and Bonaparte. To reduce migration nitroethanol of fuel in Bonaparte, fuel is applied to the protective adhesive lacquer.
Known protective adhesive sublayer patent RU No. 2217460 stated 23.07.2001, published 27.11.2003,, IPC C09D 175/00 for booking charge TRT, consisting of a 20% solution of 4,4',4"-triphenyltetrazolium in dichloroethane, and as an adhesive additive is injected to it allyl alcohol in the amount of 0.5-2%. The sublayer is cured on the surface of the fuel checkers at a temperature of from 15°to 35 ° C under the action of ORGANOTIN catalyst for the 0.75 to 6.0 hours. The composition selected by the authors as a prototype of the proposed invention. However, in the process of manufacturing charges with the use of a protective and adhesive sublayer at the specified patent identified the following disadvantages:
- when booking charges of fuels containing components derived polyformaldehyde requires the application of additional sublayer on the basis of cellulose acetate, as derivatives of polyformaldehyde significantly reduce the adhesion of ultrafine cellulose acetate Bonaparte fuel through the known protective adhesive sublayer;
- due to objective reasons, the domestic production of allyl alcohol is missing;
- allyl alcohol having aetsa toxic product, belongs to the first class of danger by MAC.
Also known protective adhesive sublayer under the patent RU №2280054 declared 14.02.2005, published 20.07.2006,, IPC C09D 175/00, consisting of a 20% solution of 4,4',4"-triphenyltetrazolium in dichloroethane, and as an adhesive additive contains monomethacrylate ether of ethylene glycol. Monomethacrylate ether of ethylene glycol is the product of chemically not stable and after the warranty period of storage (6 months) not suitable for further use. Also, at this time the release of its domestic industry is paused.
With the aim of enhancing domestic resource base to ensure the manufacturing charges of solid rocket fuel, the necessity arose to develop a new protective adhesive varnish.
The technical objective of the proposed invention is the development of a protective and adhesive lacquer to ensure a lasting bond the pieces of the TRT with Bonapartism with high protective ability of the migration processes in the system "fuel-Bonaparte"contributing to the reduction of smoke in the process, solid rocket motor that eliminates the use of additional sublayer on the basis of cellulose acetate when booking products with a low burning rate.
The technical result is achieved due to the fact that the protective adhesive varnish for booking TRT on the basis of 4,4,4"-triphenyltetrazolium, dichloroethane, as the adhesion of the additive contains a polycondensation product of ethylene glycol, adipic acid and of glycerol content of hydroxyl groups of from 2.00 to 2.30 wt.%, and as a catalyst for curing the lacquer is entered dibutyltindilaurate.
The proposed varnish allows you to securely fasten Bonaparte with the surface of the fuel charge, containing in its composition-based components derived polyformaldehyde and thus avoid the use of additional sublayer on the basis of cellulose acetate ("HELL"), and also reduces the diffusion of nitrofuran of fuel in Bonaparte during long-term storage of charges, thereby reducing power of smoke in the process, solid rocket motor. Additionally, the polycondensation product of ethylene glycol with adipic acid and glycerol content of hydroxyl groups of from 2.00 to 2.30 wt.%, is low-toxic product compared to allyl alcohol, and is also widely used in fastening adhesives in the manufacture of Bonaparte for various solid rocket motor systems.
Technology of preparation of the proposed varnish, applying it to the fuel block and the drying mode, similar to the prototype and does not require a process and apparatus for modifying the process of booking charges by casting under pressure.
In the table given the s examples of formulations intended varnish, its adhesion, migration and technological properties.
|Name||the placeholder||The estimated compositions, examples No.|
|The composition of the sublayer, %,|
|- 4,'4,'4" triphenyltetrazolium||19,55-19,85||19,65||19,65||19,75||19,80||19,85||19,90||19,90|
|- allyl alcohol||0,5-2,0||-||-||-||-||-||-||-|
|- a polycondensation product of ethylene glycol, adipic acid and of glycerol content of hydroxyl groups of from 2.00 to 2.30, wt.%||-||2,0||0,5||1,5||1,0||1,0||0,5||0,4|
|- dibutyltindilaurate||of 0.05-0.2||0,05||0,05||0,15||0,5||0,2||ml||0,1|
|The adhesion strength of Bonaparte to solid rocket fuel, kgf/cm2,|
|- high||63,1-68,4||Adhesion is missing||68,7||69,0||70,3||to 70.2||68,8||48,1|
|with a lower burning rate||64,0-66,5*||Adhesion is missing||68,0||68,3||69,4||69,7||68,2||42,6|
|The content of nitrofuran in bonapartei after storage for 30 days. for charges of high-energy fuel, %,|
|Continuation of the table|
|Indices||the placeholder||The estimated compositions, examples No.|
|The content of nitrofuran in bonapartei after storage for 30 days. for charges of fuel with a low burning rate, %,|
|Power smoke after accelerated aging of the charges at the test temperature 50°C m2/s|
|- high-energy fuel||0,8-1,8||-||0,8-1,2||1,0-1,4||0,7-1,1||0,7-1,2||0,9-1,3||-|
|fuel with a low burning rate||1,2-2,1||-||1.3 to 1.7||1,4-1,8/td>||1,0-1,3||1.1 to 1.4||1,1-1,6||-|
|* Products with an additional sublayer based on the "AC"|
From the table it is seen that the adhesion strength of Bonaparte to solid rocket fuel increased to 70,3 kg/cm2(example 4), the content of nitrofuran in bonapartei after prolonged storage at temperatures above 20°C and + 60°C decreased to 0.4 and 2.5% (example 1), and output of the smoke after accelerated aging armored charges with the proposed protective adhesive varnish was reduced to 0.7 and 1.0% (example 4). In addition it should be noted that the adhesion strength of the proposed Lac example (2-6) fuel with a low burning rate and contain components based on the derivatives of polyformaldehyde higher than that of the prototype and this prevents the application of additional sublayer on the basis of "AC". With the introduction of the protective adhesive lacquer polycondensation product of ethylene glycol, adipic acid and of glycerol content of hydroxyl groups of from 2.00 to 2.30, wt.% in the amount of 2.0 wt.% (example 1) - adhesion is missing, because of the rapid curing of the varnish on the surface of the fuel checkers, which is 0.1-0.2 hour. With the introduction of 0.4 wt % (example 7), adhese is significantly reduced, as the varnish for a long time (more than 6 hours) are not cures on the surface of the fuel checkers. In this regard, examples 1 and 7 technologically unacceptable when booking products and further research with these examples have not been conducted. In addition to manufacturing, we offer protective adhesive varnish is used available raw materials domestic production.
The proposed protective adhesive lacquer tested with a positive result in the manufacture of full-scale payment products and conduct their bench tests in the conditions of the FSUE "December".
Protective adhesive varnish for booking charge of solid propellant containing 4,4',4" triphenyltetrazolium, dichloroethane, curing catalyst, dibutyltindilaurate and adhesive additive, characterized in that the adhesion of the additive contains a polycondensation product of ethylene glycol, adipic acid and of glycerol content of hydroxyl groups of from 2.00 to 2.30 wt.%, in the following ratio, wt.%:
|A polycondensation product of ethylene glycol,|
|adipic acid and of glycerol content|
|hydroxyl groups from 2.00 to 2.30, wt.%||0.5 to 1.5|
FIELD: textile industry.
SUBSTANCE: fabric is of polyester or polyetheretherketone type. The fabric coating is produced by way of cross-linking anionic aliphatic dispersion with OH-number < 0.5 with hydrophilous aliphatic polyisocyanate, preferably, based on hexamethylenediisocyanate with NCO value 17-18. The fabric may be woven of already coated fibres or filament yarns. The coating is applied on the fabric by way of its contacting with a gluing compound containing a gluing substance activated to perform cross-linking when heated. Then the fabric is ironed at a temperature of 95-100°C. The fabric is pitched on structures at a surface temperature, with the seams and laps not heated over 100°C. The invention excludes the necessity of further application of coating on the fabric after application the coating which ensures application of a significantly less weight in the process of coating.
EFFECT: one eliminates application of any organic solvents in the gluing compounds providing for tension of oil varnishes, liquifiers, fillers or coloured oil varnishes and offers an environmentally safe method for application of coating on an aircraft.
9 cl, 3 ex
SUBSTANCE: invention can be used under high surface loads and intense action of various aggressive media, particularly when manufacturing model-casting tools and making articles in the moulding industry, for protecting printed-circuit boards from the surrounding medium and floor coatings. The coating composition contains polyester polyethylene butylene glycol adipate with molecular weight 2000 and/or polydiethylene glycol adipate with molecular weight 800, aromatic isocyanate - 4,4'-diphenylmethane diisocyanate or polyisocyanate based on 4,4'-diphenylmethane diisocyanate, a dye and an organic solvent.
EFFECT: coating has higher strength, chemical resistance, light fastness and short hardening time.
2 tbl, 5 ex
SUBSTANCE: polyurethane composition contains a prepolymer - a product of reacting 1.0 mol of polyethylene butylene glycol adipate with molecular weight 2000 and 2.2-2.3 moles of a mixture of 2,4-toluene diisocyanate and 2,6-toluene diisocyanate in ratio 80:20, a hardener based on 3,3'-dichloro-4,4'-diaminodiphenyl methane and low-molecular polyesters with molecular weight 400-1000 in weight ratio 35:65, as well as an oxypropylated ethylenediamine catalyst and a dye.
EFFECT: improved processing and operational characteristics, longer working life of the composition, adhesion strength and endowing the composition with the required viscosity.
SUBSTANCE: invention relates to polymeric compositions based on moulding polyurethane elastomers and can be used to produce anti-noise coatings for use in shipbuilding industry, as well as other engineering fields. The polyurethane composition for producing anti-noise coatings through moulding contains a urethane prepolymer obtained by reacting 1.2 moles of 4,4'-diphenylmethane diisocyanate and 1.0 mole of polydiethyleneglycoladipinate with molecular weight 1600, and a liquid hardener which is a mixture of di- and triethanolamines in molar ratio 1:1.5, a solution of trioxymethylphosphine and polypropylene glycol with molecular weight 1000 in molar ratio of 0.9:0.1. The composition contain filler - T-900 technical carbon in amount of up to 3%.
EFFECT: obtaining a composition with high adhesion to metallic and non-metallic surfaces, good dynamic characteristics (low value of dynamic modulus and high level of mechanical loss) and fire-resistance, which provides a coating with good anti-noise properties.
2 cl, 2 tbl
SUBSTANCE: described is a polymeric anticorrosion composition for protecting metal structures from corrosion, containing a component A which contains: a) a branched saturated polyester polyol, in which concentration of hydroxy groups equals 8.4-8.7%, b) a catalyst selected from a group of organotin compounds, c) an organosilicon compound, d) a pigment, e) a dispersing agent and a component B which is an aliphatic polyisocyanate obtained from hexamethylenediisocyanate, isocyanurate and/or isocyanbiuret, characterised by that component A contains organosilicon compounds in form of aminoethyl-aminopropyl-trimethoxy silane [H2NC2H4NHC3H6-Si(OCH3)3] and glycidoxypropyl-trimethoxy silane [CH2(O)CHCH2C3H6-Si(OCH3)3], and also contains molecular sieves selected from synthetic zeolites, deaerators and special thixotropic agents, such as aerosil, in the following ratio (wt %): catalyst 0.1-1.0; molecular sieve 5.0-10.0; aminoethyl-aminopropyl-trimethoxy silane 0.1-2.0; glycidoxypropyl-trimethoxy silane 0.1-2.0; pigments 1.0-2.0; deaerators 0.01-0.1; aerosil 1.0-2.0; dispersing agent 0.1-0.2; saturated branched polyester polyol - the rest; the volume ratio of component A to component B when mixing is equal to 1:1 with possible deviation of ±15% from the given ratio.
EFFECT: obtaining a polymeric anticorrosion composition without a solvent for making a modified strong polyurethane coating with high frost resistance, low water absorption, high impact resistance.
5 cl, 4 tbl
FIELD: polymer materials.
SUBSTANCE: invention can be used in manufacture of artificial leather for footwear industry. Composition for preparing face coating of artificial leather containing 59.6-73.2% of 25% dimethylformamide solution of polyurethane "Vitur P-0112" and 21.6-26.9% of dimethylformamide further contains, as modifying additive, interpolymer complex in the form of gel based on polymethacrylic acid and polyvinyl alcohol (5.2-13.5%). Once applied onto substrate, composition is hardened with 10-30% aqueous dimethylformamide solution.
EFFECT: improved quality of face coating due to more uniform anisotropic structure and improved physicomechanical characteristics at simultaneous intensification of preparation of the composition and formation of porous structure.
FIELD: polymer materials.
SUBSTANCE: polymer composition for preparing face coating of artificial leather for upper containing 54.8-59.5% of 25% dimethylformamide solution of polyurethane "Vitur P-0112" and 14.2-15.5% of dimethylformamide further contains additive: powdered interpolymer complex based on polyacrylic acid, sodium polyphosphate and monobasic dipyridyl (9.5-16.8%) and, additionally, isopropyl alcohol (14.2-15.5%). Once applied onto substrate, composition is hardened with 10-30% aqueous dimethylformamide solution. Coating increases hygroscopicity from 2.1 to 16.5%, wettability from 106.2 to `60% for 2 h and from 149.8 to 175% for 24 h.
EFFECT: considerably improved hygienic properties of material, achieved rather high vapor-permeability characteristics and physicomechanical properties at satisfactory percentage of shrinkage during drying of face coating.
FIELD: chemistry of polymers, covers, chemical technology.
SUBSTANCE: invention relates to a method for preparing polyurethane compositions based on alkyd oligomers and diisocyanates used in protective covers on metal, wood and concrete. The polymeric composition for covers comprises modified uralkyd resin, siccative, antioxidant and an organic solvent. Method involves using uralkyd resin of the molecular mass 6900-12100 Da modified with secondary aliphatic amine, primary alcohol and water as a modified uralkyd resin wherein the proposed uralkyd resin comprises the following components, %: urethane groups, 11.2-12.1; carbamide groups, 0.40-0.81, and biuret groups, 0.37-0.79. Xylene or white spirit or their mixture taken in the mass ratio = 1:1 are used as an organic solvent. Invention provides preparing polymeric covers showing good color indices, high volume microhardness, wear resistance and strength properties and proposed covers are able to be hardened with high velocities at temperature 20 ± 2°C.
EFFECT: valuable technical properties of composition.
FIELD: polymer materials.
SUBSTANCE: invention relates to coating composition containing (A) at least one oligomers of polyester prepared from reagents including (a) 20-60% of at least one polyol, (b) 5-30% of at least one polycarboxylic acid selected from group composed of cyclic polycarboxylic acids and esters and anhydrides thereof wherein carboxylic groups are separated from each other by 3 or less carbon atoms, and from group of α,β-unsaturated acyclic polycarboxylic acids and esters and anhydrides thereof, and (c) 20-60% of at least one monocarboxylic acid (sum a+b+c always being 100%), wherein oligomer is a low-viscosity one having weight average molecular weight below 5000 and hydroxyl number within a range of 200 to 400 mg KOH/g oligomer; and (B) at least one polyisocyanate. Use of coating compositions according to invention in the field of finishing and re-finishing of motor cars and large vehicles is also described. Compositions are particularly suitable for use as primers and finish layers of layered coatings.
EFFECT: reduced low-temperature drying time, increased strength of film, and improved polishing ability.
14 cl, 8 tbl, 14 ex
FIELD: rocket engineering.
SUBSTANCE: invention provides polyurethane varnish to be applied as sublayer to enhance adhesion of polymer compositions to the surface of removable charges armored with acrylate- or acetylcellulose-based compositions, to the surface of various types of alloyed steels, to titanium or aluminum bodies, to various types of heat-insulation coatings (including rubber, and glass-fiber materials) before gluing charges into engine body. Varnish is prepared by mixing adhesive agent with base and solidification catalyst, said adhesive agent being ethylene glycol/glycerol/sebacic acid condensation product, said base being combination of 2,4-tolylenediisocyanate and acetone, and said solidification catalyst being xylene or toluene solution of copper oleate used in amounts 0.5 to 2.0 wt %.
EFFECT: invention enables attachment of propellant cartridges to various parts of rocket engine with elevated adhesive strength and ensures level of adhesion, physico-mechanical, and ballistic characteristics during warranty-period storage.
SUBSTANCE: invention relates to polymeric heat-reflecting coating compositions which are applied on inflatable structures, protective and rescue equipment (airstairs for civil aviation, floatation rafts, airships, pneumatic tents, heat-reflecting screens, shields for firefighters), consisting of airtight elastic material based on fabric (capron, nylon, lavsan, high-strength aramid fibre SVM). The polymeric heat-reflecting coating composition contains urethane rubber, a hardener, aluminium paste and ethyl acetate.
EFFECT: production of cold-curable polymeric heat-reflecting coating composition, having high resistance to thermal radiation (up to 29 kW/m2) and minimum weight gain (thickness).
SUBSTANCE: invention relates to thermally solidificated covering substances based on aprotic solvents. Claimed is covering substance, which contains at least one compound (A), which contains hydroxyl groups, at least one compound (B) with free and/or blocked isocyanate groups, and at least one catalyst (D) for cross-linking silane groups, with one (i) or several components of covering substance containing hydrolysed silane groups and (ii) covering substance can be finally solidificated for covering, which has statistically distributed regions of lattice Si-O-Si. Obtained from covering substance solidificated coating has index of further cross-linking (PCI) lower than 2, with index of the further linking (PCI) being determined as coefficient from memory module E'(200) of finally solidificated coating, measured at 200°C, to minimum of memory module E'(min) of finally solidificated covering, measured at temperature higher than temperature of transition into glass-like state of Tg, and memory modules E'(200) and E'(min),as well as temperature of transition into glass-like state Tg are measured on free films with thickness of layer 40 mcm+/-10 mcm by means of dynamic mechanical thermal analysis (=DMTA) at rate of heating 2 K per minute and frequency 1 Hz and DMTA measurement on free films with thickness of layer 40 mcm+/-10 mcm, which are solidificated for 20 minutes at object temperature 140°C and after solidifying are kept for 8 days at 25°C, before carrying out DMTA measurements. Polyisocyanate (B) at least partially has one or several similar or different structural units of formula -X-Si-R"XG3-X, where G = identical or different hydrolysed groups, in particular alcoxy group, X=organic residue with from 1 to 20 carbon atoms, R" =alkyl, cycloalkyl, aryl or aralkyl, and carbon chain can be broken by non-adjacent oxygen groups, sulphur or NRa, with Ra=alkyl, cycloalkyl, aryl or aralkyl, x=0 to 2. Catalyst (D) is phosphorus-containing, and covering substance contains catalyst (D) from 0.1 to 10 wt % in terms of non-volatile components of covering substance. Also claimed are multi-step method of applying coating with application of claimed covering substance, as well as application of claimed method and versions of claimed coating application.
EFFECT: possibility to obtain transparent varnish coating with high resistance to atmospheric impact.
18 cl, 4 tbl, 7 ex
SUBSTANCE: invention relates to thermally solidificated covering substances based on aprotic solvent. Claimed is covering substance, which contains at least one compound (A), containing hydroxyl groups, at least one compound (B), containing isocyanate groups, and at least one phosphorus-containing catalyst (D) for cross-linking silane groups, with one or several components of covering substance containing between 2.5 and 97.5 mole %, counted for totality of structural units -N(X-SiR"x(OR')3-x)n(X'-SiR"y(OR')3-y)m (II) and -Z-(X-SiR"x(OR')3-x) (III), at least one structural unit of formula (II), where R'=hydrogen, alkyl or cycloalkyl, carbon chain can be interrupted by means of non-adjacent groups of oxygen, sulphur or NRa, with Ra= alkyl, cycloalkyl, aryl or aralkyl, X,X'=linear and/or branched alkylene pr cycloalkylene residue with from 1 to 20 carbon atoms, R" =alkyl, cycloalkyl, aryl or aralkyl, and carbon chain can be interrupted by means of non-adjacent groups of oxygen, sulphur or NRa, with Ra= alkyl, cycloalkyl, aryl or aralkyl, preferably R"=alkyl residue, n=0 to 2, m=0 to 2, m+n=2, x,y=0 to 2; and between 2.5 and 97.5 mole %, counted per totality of structural units (II) and (III), at least one structural unit of formula (III), where Z=-NH-, -NR-, -O-, R=alkyl, cycloalkyl, aryl or aralkyl, and carbon chain can be interrupted by means of non-adjacent groups of oxygen, sulphur or NRa, with Ra= alkyl, cycloalkyl, aryl or aralkyl, x=0 to 2, and X, R', R" have value, given above, and covering substance can be finally solidificated before covering, which has statistically distributed regions of lattice Si-O-Si. Also claimed are multi-step method of applying coating with application of claimed covering substance, as well as application of claimed method and versions of claimed coating application.
EFFECT: possibility to obtain transparent varnish coating with high resistance to formation of cracks under atmospheric impact and perfect resistance to scratching.
18 cl, 4 tbl, 7 ex
SUBSTANCE: invention relates to thermally solidificated covering substances based on aprotic solvent. Claimed is covering substance, which contains at least one compound (A), containing hydroxyl groups, and at least one compound (B), containing isocyanate groups, and one or several components of covering substance have between 2.5 and 97.5 mole % counted per totality of structural units (I) and (II), at least one structural unit of formula (I), where R'=hydrogen, alkyl or cycloalkyl, and carbon chain can be interrupted by non-adjacent groups of oxygen, sulphur or NRa, with Ra= alkyl, cycloalkyl, aryl or aralkyl, X,X'=linear and/or branched alkylene or cycloalkylene residue with from 1 to 20 carbon atoms; R"= alkyl, cycloalkyl, aryl or aralkyl, and carbon chain can be interrupted by non-adjacent groups of oxygen, sulphur or NRa, with Ra= alkyl, cycloalkyl, aryl or aralkyl, n=0 to 2, m=0 to 2, m+n=2, x,y=0 to 2; and between 2.5 and 97.5 mole % counted per totality of structural units (I) and (II), at least one structural unit of formula (II), where Z=-NH-, -NR-, -O-; R=hydrogen, alkyl, cycloalkyl, aryl or aralkyl and carbon chain can be interrupted by non-adjacent groups of oxygen, sulphur or NRa, with Ra= alkyl, cycloalkyl, aryl or aralkyl, x=0 to 2, and X, R', R" have value, given above; and polyol (A) contains at least one poly(meth)acrylate polyol. Also claimed are multi-step method of applying coating with application of said covering substance, method application and versions of coating application.
EFFECT: possibility of simple obtaining of transparent varnish coatings with high resistance to crack formation under atmospheric impact and perfect resistance to scratching, which do not cause any ecological problems.
15 cl, 2 tbl, 4 ex
SUBSTANCE: polyurethane coating is made from a composition which contains refined castor oil, an ester, an antifoaming additive BYK-066 based on fluorine-modified polysiloxanes, aluminium oxide, titanium oxide, aerosil, a water adsorbent, an additive BYK-410 - urea in an organic solvent N-methylpyrrolidone, a curing agent isocyanate SUPRASEK 5025, which is 4,4'-diphenylmethane diisocyanate and additionally as filler - dolomite or zeolite or a mixture of dolomite and zeolite in ratio 3.25:1.
EFFECT: coating has high breaking strength and modulus of elasticity in tension, while providing sufficiently high deformation characteristics, particularly tensile elongation.
SUBSTANCE: method to manufacture a coating includes preparation of a mixture by means of mixing of a filler from rubber crumb and a binder based on polyurethane. Simultaneously and separately from each other mixtures are produced for basic and upper layers, at the same time in the mixture for the basic layer they use a filler from rubber crumb with fraction of 2-12 mm, and in the mixture for the upper layer they use a filler from rubber crumb with fraction of 1-3 mm and a pigment dye. In process of mixture mixing for its upper layer it is compacted, afterwards the mixture for the upper layer is serially discharged into a die mould, then the mixture for the basic layer is discharged, and pressed under pressure with the help of a press, then maintained until full hardening, and the produced coating is discharged from the die mould.
EFFECT: high efficiency of coating manufacturing, higher reliability and durability of a coating, possibility to manufacture a double-layer coating with damping properties.
SUBSTANCE: formulation composition contains: A) 5-95 wt % at least one radiation-curable resin, B) 5-25 wt % silicic acid, C) 0.1-10 wt % at least one adhesion promoter, D) 5-90 wt % at least one radiation-curable reactive diluent, E) 0.5-5 wt % at least one dispersant. The adhesion promoter is selected form phosphoric acid and/or phosphonic acid and/or products of reaction thereof with functionalised acrylates. The composition can additionally contain photoinitiators, pigments and additives, selected from diffusion promoting agents, delustering agents and degassing agents. The compositions are used as a primer, an intermediate layer, coating varnish and/or clear varnish, as well as for making coatings via a coil coating technique.
EFFECT: coatings have flexibility, thereby providing excellent protection of metal substrates from corrosion.
18 cl, 2 tbl, 6 ex
SUBSTANCE: invention relates to a self-crosslinking binder for coating compositions containing an aqueously dispersed polymer component A having at least one carbonyl group of the ketone or aldehyde type per molecule, and a component B having at least two hydrazine or hydrazide groups per molecule, and at least one structural unit -NR1-NR2-CHR3-CHR4-NH-R5 (I), where the radicals R1, R2, R3 and R4 are each individually selected from a group consisting of a hydrogen radical and a linear or branched alkyl radical having from 1 to 10 carbon atoms, R3 and R4 may additionally be selected from a group consisting of aryl and alkylaryl radicals having from 6 to 15 carbon atoms, and from oxyalkyl radicals with 1 to 10 carbon atoms, where oxy groups may be inserted into the alkyl chain or at the end of an alkyl chain, and R5 is selected from a group consisting of a hydrogen radical, alkyl radicals which may be linear, branched or cyclic and may have from 1 to 10 carbon atoms, and residues of formula -(CH2)n-CO-O-X, where n is an integer of from 1 to 6, and X is a residue of a polyatomic alcohol or phenol. A method of producing such a binder is also described.
EFFECT: producing a coating binder which is self-crosslinking when drying, having fast drying properties and improved chemical resistance and weather resistance.
17 cl, 5 ex, 5 tbl
SUBSTANCE: invention represents an emulsion, in which oligomers with terminal isocyanate groups are a dispersion medium, and a disperse phase is a solution or a dispersion produced as a result of mixing a lime solution with calcium hydroxide content of 10-70 wt % with glycerine in the amount of 1-250 wt parts per 100 wt parts of calcium hydroxide, besides, the disperse phase content in the composition makes 1-55 wt %.
EFFECT: development of a cheap and easy to apply composition, coatings from which have high adhesion to moist metal or concrete surfaces, have proper adhesion to concrete applied onto them, are hardened with specified speed at temperature from zero and above, inhibit processes of metal corrosion and have low elasticity module.
SUBSTANCE: coating has surface tension less than 20 mN/m, wherein the coating material used is hydrolysis-resistance lacquers, and where the hydrolysis-resistant lacquers are selected from a group consisting of polyurethanes, acryl and silicones, where the coating has a random topography with roughness of less than 500 nm, preferably less than 300 nm.
EFFECT: coating prevents deposit of bacteria and improves thermal conduction of the coated material.
19 cl, 4 dwg, 2 ex
FIELD: optical engineering.
SUBSTANCE: invention, in particular, relates to UV solidifying composition based on urethane acrylates and containing 6.0-19.3 wt parts of hydroxyalkylacrylate and 1-5 wt parts of light initiator, said urethane acrylate base being mixture of 30.0-82.0 wt parts of interaction product of poly(oxypropylene glycol), 2,4-tolylenediisocyanate, hydroxypropyl acrylate, and 1,2-propylene glycol [molar ratio (1-2):(2-3):(2-2.1):(0.003-0.33)] with 4.7-60.0 wt parts of interaction product of 2,4-tolylenediisocyanate, hydroxypropyl acrylate, and 1,2-propylene glycol [molar ratio 1:(2.5:(0.004-0.065)]. Fiber light guide consisting of quartz optical fiber enrobed by above-defined composition is further described. Loss of light in light guide is thus lowered to 0.42-0.23 dB/km. Rupture strength is thus increased by 7.0 GPa.
EFFECT: increased rupture strength and reduced light loss.
2 cl, 1 tbl, 8 ex