SUBSTANCE: invention is related to materials for protection against corrosion of pipeline metal surfaces and electric cables in metal casing, and also to materials for sealing of accumulators. Mastic based on asmol contains oil dissolvent, ASM glue, plasticiser, bivinyl styrene thermoplastic elastomer DST and syndiotactic 1.2 polybutadiene. Mastic may additionally contain chalk.
EFFECT: mastic has high resistance to loads due to increase of its strength characteristics, when mastic is applied onto polymer base, possibility is provided to use tape at low temperatures (up to -20°C).
2 cl, 1 tbl
The invention relates to the field of construction and operation of pipelines, oil pipelines and gas pipelines, in particular to materials for corrosion protection of metal surfaces of pipelines.
Known bitumen-polymer mastic, including bitumen, definiltely TPR, industrial oil as plasticizer and rubber as a modifier in the following ratio, wt.%:
[Pat No. 2192578, CL F16L 58/12, publ. 2002].
However, the mastic does not provide reliable protection of the pipeline due to a lack of high adhesion to the metal surface (0.5-0.6 MPa)due to low adhesive ability to the metal of the main component is bitumen.
The authors have developed a resin comprising as a main component - Asmol petroleum derivative polymer having physico-chemical characteristics similar to the bitumen, but with a significantly higher adhesion to metal (1.0 to 1.5 the PA). First Asmol (wax compound in the form of wax oligomer was obtained by reacting asphalt of deasphalting with kubovy the remainder of isoprene production stage regeneration dimethylformaldehyde in the presence of sulfuric acid [U.S. Pat. Of the Russian Federation No. 2074224, CL SC, publ. 1997]. In further to get asmala with qualities similar to the second component was replaced by a heavy tar - VAT residue regeneration of dimethylformamide (KORD) [Nemchenko, Ippadi, Campuseros, YouTube. Asmol and new insulating materials for underground pipelines. - M.: OOO "Nedra-Business centre", 2005, p.108].
Closest to the claimed object is mastic containing wax connection Asmol", mineral oil S-9 as a plasticizer, definiltely Thermoelastoplastic, antioxidant and chalk in the following ratio, wt.%:
|Mineral oil S-9||15,5-17, 0mm|
[RF patent №2138884, CL NM 2/08, SC 3/10, publ. 1999].
This sealant is designed for sealing of batteries and unsuitable for use as the adhesive layer of polymeric adhesive tapes. Mastic has good adhesion to metal and polypropylene, however, the softening temperature by Kish above 100°C makes impossible the implementation of the technological process of manufacture of the tape, as it has low fluidity of the melt mastic. In addition, the high content of chalk in mastic (4%) leads to increased water absorption mastic.
The invention is aimed at improving the quality of mastic to give her a high protective properties and its application as an adhesive layer for polymer adhesive tapes: decrease the softening temperature of the mastic, the increase of adhesion to polyethylene and polyvinyl chloride at low temperatures of application, reduced water absorption, increases durability of the coating to peel at the cathodic polarization and deformation loads.
This is achieved in that the mastic-based asmala containing definiltely TPR DST, oil as plasticizer, according to the invention further comprises a glue AFM, solvent "nefras" and syndiotactic 1,2 polybutadiene, at the same time as oil mastic contains rapeseed oil when next the ratio of components wt.%:
|thermoplastic elastomer DST||0,9-3,0|
|Rapeseed oil||1,0-of 17.0|
Mastic may further comprise chalk in the following ratio, wt.%:
|thermoplastic elastomer DST||0,9-3,0|
|Rapeseed oil||1,0-of 17.0|
|Chalk||0.3 to 0.5.|
Asmol is a solid elastic material black color density of 0.99 1.06 kg/cm and produced at JSC UZEMIK (Ufa) TU 5623-002-05111644-96 "Mastic composition for anti-corrosive coatings "Asmol"".
Solvent "nefras" is produced in the domestic industry in large scale according to GOST 10214-78 "oil Solvent. Technical conditions". For example, it is produced at JSC "Salvatorkirche", JSC "Ufaorgsintez", JSC "LUKOIL-Permnefteorgsintez", etc.
Definiltely TPR DST is a block copolymeres based on styrene and butadiene and is available in JSC "Voronezhsintezkauchuk" beyond 38.40327-98.
Syndiotactic 1,2 polybutadiene is a commercial product and is produced, in particular under the trademark "Herodian" CH-8000 JSC "Efremov synthetic rubber plant".
Rapeseed oil is produced at JSC "Satraps" according to GOST 8988-77 "rapeseed Oil. Technical conditions".
Glue AFM is a solution of a rubber mixture based on butyl rubber and Asmol in gasoline-solvent for the rubber industry. Glue AFM is available product is the first product and is produced at JSC "UZEMIK" (Ufa) TU 2513-032-16802026-2007 "Anticorrosive adhesive composition (Adhesive AFM)".
The preparation of the proposed mastic is as follows.
Download estimated number of rapeseed oil, glue AFM, solvent nefras", divinylacetylene thermoplastic elastomer DST, syndiotactic 1,2-polybutadiene with increasing temperature up to 100-110°C., stirred until complete dissolution of the polymers, then increase the temperature to 125-130°C and add Asmol, followed by stirring to dissolve at a temperature of 130-150°C (for 8-13 hours), then Mel, if necessary.
According to the claimed method were obtained mastic composition which, as well as physico-chemical characteristics are presented in table. For comparison, the composition and properties of mastic, obtained according to the prototype.
As can be seen from the table, the proposed mastic on its physical and mechanical properties superior to the prototype: it has a lower softening temperature according to Kish, a higher adhesion to metal and polymer-based, high resistance to cathodic peeling, low water absorption mastic.
Thus, the use of the proposed mastic will allow for a comparison with mastic prototype to use it as an adhesive layer of polymeric adhesive tapes, ensuring their high protective properties: high adhesion to metal and polymer-based, resistance to UTS is eiveniu when the cathodic polarization and deformation loads, low water absorption, the use of tape at low temperatures (down to minus 20°C).
|Composition and comparative performance of the proposed mastic and mastic prototype|
|on the proposed mastic||prototype|
|- Definiltely TPR DST||3,0||2,0||2,0||0,9||4,0|
|- Solvent "nefras"||6,0||1,0||1,0||3,5||-|
|- Canola oil||of 17.0||10,0||10,0||1,0||-|
|- Mineral oil S-9||-||-||-||-||15,0|
|Physico-chemical properties of mastics:|
|- Softening temperature by Kish, °C||75||83||85||94||102|
|- Penetration mastic at 25°C, 0.1 mm||90||72||60||64||60|
|- Adhesion to steel at (20±3)°C, kg/cm||2,5||3,1||3,2||3,7||2,0|
|- Adhesion to polyethylene and polyvinyl chloride (overlap) at (20±3)°C, kg/cm||2,1||2,5||2,6||2,6||1,5|
|- Flexible ribbon|
|No cracks on bending temperature||-20°C||-10°C||0°C||0°C|
|- Water for 24 h, three (20±3)°C, %||0,10||0,10||0,15||0,17||3,0|
|Area of peeling* when the cathodic polarization after soaking in the electrolyte at (20±3)°C for 30 days, cm2,||2,7||3,2||3,4||3,0||15,2|
|*The larger the area of exfoliation, the lower protective properties of the coating|
1. Mastic based asmala containing definiltely TPR DST, oil as plasticizer, characterized in that it further comprises a glue AFM, solvent "nefras" and syndiotactic 1,2-polybutadiene, at the same time as oil mastic contains rapeseed oil in the following ratio, wt.%:
|thermoplastic elastomer DST||0,9-3,0|
|Rapeseed oil||1,0-of 17.0|
2. Mastic according to claim 1, characterized in that it further comprises chalk in the following ratio, wt.%:
|Definiltely TPR DST||0,9-3,0|
|Rapeseed oil||1,0-of 17.0|
SUBSTANCE: internal surface of pipeline is cleaned by cleaning mechanism displacing inside the pipe. The cleaning mechanism is comprised of a shaft with naves and elastic and flexible blades being mounted on the naves in staggered order. The blades generate liquid jets that damage deposits on the pipeline walls. The hydraulic resistances are oscillated in liquid flow and hit pipeline wall. There are chambers installed on the ends of pipeline, where drums and sleeves are inserted. The end of sleeve is bent and forms cavity, which is connected to the liquid agent supply system. Flexible casing in the form two sleeves is inserted into the pipe from the opposite sides. The ends of both sleeves are bent and fixed around pipeline perimeter. The casing is inflated by supplying liquid agent. As a result a cavity is form between sleeves and filled up with solution. Solid coating is applied by sleeves over-rolling along the pipeline with the solution being delivered between them. Diametre of one sleeve is equal to inner pipeline diametre, while the other sleeve diametre is similar to inner pipeline diametre plus applied coating.
EFFECT: wide range of facilities.
6 cl, 11 dwg
SUBSTANCE: device consists of a housing with rolls being installed on it, defect detector, element for damaged area sealing, mechanism for the element expansion comprised of a set of hold-down tools, recoil compression spring, front and rear beveled push rods, and expansion mechanism drive. The device is provided with dielectric tube and rings installed coaxially on the housing. The recoil compression spring, front and rear beveled push rods are mounted on the external surface of dielectric tube. The above mentioned front and rear beveled push rods are represented with grooved shell rings for displacing hold-down mechanism. The tubular electric heaters and flexible heat-resistant curtain are fixed to cones along the perimetre. The holders are implemented with spring-loaded extensible legs. The textile sheet made from strong rot-resistant material impregnated with glue compound and wounded on hold-down tools is used as an element for damaged area sealing. The above-mentioned hold-down tools are lined with plates incapable of sticking. The extension mechanism drive is implemented with power spring made from alloy with revertible elastic recovery effect.
EFFECT: simple design, reduced overall dimensions and weight.
SUBSTANCE: pipeline external surface is cleaned, prime coating is applied on it, and rolled mastic reinforced material on the basis of bitumen-polymer or asphalt-resin putty is successively spirally wound with an overlap, as well as heat-shrinkage wrapping with its subsequent thermal treatment. Prior to wrapping application polymer tape is additionally wound with the layer of the same putty on the whole of its surface that faces the pipeline, and simultaneously it is rolled with elastic rollers. Wrapping is double-layer polymer heat-shrinkage tape with hard thermomelting adhesive layer.
EFFECT: increase of pipeline reliability.
SUBSTANCE: thin layer of a metal protector is preliminary evaporated on the pipe inner surface tip with the inner protective coat. Now, a split metal ring is placed on the said metal protector evaporated layer, its metal conforming to that of the said evaporated layer, and is pressure-welded in the protector super elastic deformation conditions and deformations rates subject to the alloy.
EFFECT: reliable and strong contact of the protector with the pipe surface and better welded joint seam nearby zone protection.
SUBSTANCE: method comprises applying epoxy primary layer and thermo-shrinking adhesion belt provided with a protecting layer on the surfaces to be insulated. The epoxy primary layer is applied on the surface heated up to a temperature of 60-90°C.
EFFECT: enhanced reliability.
4 cl, 1 tbl
FIELD: pipeline construction.
SUBSTANCE: method comprises applying interrupted layer of concrete-sand coating along the section of the pipeline to be repaired, allowing the layer to solidify, and applying the coating throughout the length of the pipeline section to be repaired. The coating mixture is supplied through the step hose thus allowing the thickness of the coating to be up to 400 mm for the diameter of the pipeline up to 5000 mm.
EFFECT: enhanced reliability.
2 cl, 5 dwg
FIELD: protection of pipe against corrosion.
SUBSTANCE: method comprises applying prime coat on metallic surface at a temperature of no less than 10°C, applying insulating polymeric belt coating on metallic surface, and heating the coating to provide its shrinking.
EFFECT: enhanced corrosion protection.
6 cl, 1 tbl, 3 ex
SUBSTANCE: method comprises setting the tip in the end section of the pipe lined by a plastic shell. A protector is fit in the tip with interference. The tip clamps the end of the plastic shell by mandrelling. The tip is fit in the pipe with interference. The tip is mandrelled out of the zone of protector.
EFFECT: enhanced reliability.
FIELD: protection of metals against corrosion; protection of extended underground gas lines against corrosion.
SUBSTANCE: proposed method includes restoration of defective sections of gas lines by application of insulating protective coats and connection with cathode protection system; defective section of gas line is preliminarily disconnected from gas main and is freed from natural gas; gas released from this section is compressed and is charged in reservoirs under pressure; gas line surface is cleaned from soil and defective coat by forming temperature gradient and stresses between defective coat and gas line; then finish cleaning of outer surface of gas line is performed at simultaneous suction of dust and gas line is heated to temperature of 70 to 175°C, after which layers of adhesive composition and dielectric insulating coat are applied at succession at overlapping joints between steel pipes of gas line and layer of spiral-shaped coat made from metal at potential more negative as compared with potential of gas line being protected; metal coat is applied in form of tape or foil whose ends are brought out at distance of (0.01-1)d, where d is diameter of pipe. Then, insulating plastic coat is applied on metal coat and after erection of gas line, ends of tape or foil are electrically connected at points of joints of steel pipe over entire length of gas line through switching units and parameter measuring units.
EFFECT: enhanced reliability of corrosion protection; considerable reduction of energy expenses; increased service life of metal coat.
3 cl, 10 dwg
FIELD: pipeline transport.
SUBSTANCE: method comprises fusing corrosion-resisting metal on the zone of the inner surface directly adjacent to the faces of pipes, lining the inner surface of the pipe ends including the surface of the fusing by adhesion coating made of heat-resistant corrosion-resisting material, applying anticorrosion coating on the inner surface of pipes including the surface of lining, and joining pipes by welding. The adhesive coating made of the heat-resistant corrosion-resistant material is made by gas-thermal spraying of the corrosion-resistive metal.
EFFECT: enhanced reliability.
1 cl, 2 dwg
SUBSTANCE: cutting tool is implemented with core made of superhard abrasive material on the basis of diamond or cubic boron nitride and with internal and external layers. Inner layer is implemented from carbide, nitride, carbonitride or boride of metal and is chemically combined with external surface of superhard abrasive material. External layer is not carbonised and is implemented from tungsten, physically deposited on internal layer. It is provided reliable protection of particles from superhard abrasive material, excluding its contact to components of bundle at manufacturing of tool.
EFFECT: durability increasing of tool and efficiency of treatment.
7 cl, 1 ex
SUBSTANCE: composition is obtained by mixing of (a) first polyurethane with end silane groups obtained by interreaction of: (i) monofunctional compounds with (ii) isocyanate component containing two isocyanate groups and following interreaction of reaction product of components (i) and (ii) with (iii) compound containing group reactive toward isocyanate and one or more reactive silane groups whereat at least 10 mole % of component (iii) is compound of formula (I): with formation of moisture-crosslinked alcoxysilane functional polyesterurethane; and (b) second polyurethane with end silane groups obtained by interreaction of: (i) linear, branched or cyclic alkylmonofunctional alcohol containing 1-20 of carbon atoms, amine and/or thiol with (ii) isocyanate component containing two isocyanate groups and with product of the interreaction of components (i) and (ii) with compound (iii) containing group reactive toward isocyanate and one or more reactive silane groups corresponding to formula (I).
EFFECT: coating films applied to the substrate possess excellent tensile strength and tensile elongation which provides reducing of film cracking, blistering and peeling.
17 cl, 4 ex
SUBSTANCE: invention is related to composite materials used for increase of friction coefficient between wheels of transport means and working surface, and may find application in motor, aviation, construction and other industries. Composite material is described, which provides for motion of transport vehicle on slippery snow or ice surface made of composition that contains wood chips in amount of 40-97 wt %, water solution of sodium chloride or calcium chloride or potassium chloride in amount of 1-30 wt %, 1-30 wt % of soot and 1-25 wt % of wollastonite, besides, average size of soot and wollastonite particles makes from 1 mcm to 250 mcm. Method is also described for production of composite material, which provides for motion of transport vehicle on slippery snow or ice surface. Method includes preparation of aqueous solution of sodium or potassium or calcium chloride, mixing of wood chips, soot and wollastonite in solution of sodium or calcium or potassium chloride, separation of suspension by filtration, drying of produced mixture at temperature of 80-150°C and packing of dried product.
EFFECT: improved friction properties between wheel of transport vehicle and slippery surface, elimination of slipping and wheel skidding on ice.
3 cl, 1 ex
SUBSTANCE: making of compositional ferroabrasive powder includes mixing of the wet ferromagnetic powder component (iron powder) with dried at temperature 80-120°C adhesive structure-forming component - powder of nanocrystall aluminium hydroxide γ-AlOOH. Then abrasive powder component (diamond powder) and binding component are added. The mixture is agitated up to obtaining of homogenous structure and heated up to temperature of composition dehydratation - 290-350°C. Ferroabarsive compositional powder with desired particle size is formed by its rubbing through corresponding calibrated sieves. Ferroabrasive composite powder components have the following volume ratio: ferromagnetic component - 30-65%, adhesive -forming component - 30-40%, abrasive component up to 15%, binding component - the rest.
EFFECT: quality improvement of processed surfaces alongside with increase of material removal intensity, increase of abrasive processing speed, decrease of the working zone temperature.
7 cl, 1 tbl, 1 ex
FIELD: electrical engineering.
SUBSTANCE: invention relates to electrical engineering, particularly to the method of producing sealer-lubricant that comprises selecting diblock copolymer from the group of styrene-ethylene/butylene or styrene-ethylene, propylene and combination thereof. It also includes and combining diblock copolymer with mineral oil at temperature lower than that of glass transition of styrene zones. Proposed method can comprise also filtration of styrene-rubber diblock copolymer to produce particles sized to less than 1 mm.
EFFECT: sealer with higher creep resistance at 70 to 80°C.
6 cl, 3 dwg, 6 tbl, 7 ex
SUBSTANCE: technical effect consists in enhancement of the ice resistance to destructive loads associated with hockey playing, improvement of the ice plasticity and the ice surface slip properties. In accordance with the method proposed on initially provides for freezing on a lower adhesive layer at least 1 mm thick with admixture of a composite in an amount no more than 50 ppm which is represented by water suspension of polytetrafluorethylene and/or a tetrafluorethylene-hexafluorpropylene copolymer and/or perfluordecaline. One provides for cyclically freezing on layers of varied chemical composition. Within one cycle one successively applies several clear (containing no admixtures) ice layers and several modified layers containing admixtures of ammonia in an amount from 1 ppm to 100 ppm and water suspension of polytetrafluorethylene and/or a tetrafluorethylene-hexafluorpropylene copolymer and/or perfluordecaline in an amount from 0.1 ppm to 50 ppm. The aggregate thickness of modified layers within a single cycle is no more than 2 mm. The aggregate thickness of clear ice layers within a single cycle is no less than 5 mm. After application of the lower layers on the hockey ground underlayer one provides for freezing on upper modified layers containing admixtures of ammonia in an amount from 1 ppm to 100 ppm and water suspension of polytetrafluorethylene and/or a tetrafluorethylene-hexafluorpropylene copolymer and/or perfluordecaline in an amount of approximately 50 ppm.
EFFECT: enhancement of the ice resistance to destructive loads associated with hockey playing, improvement of the ice plasticity and the ice surface slip properties.
5 cl, 1 dwg, 6 ex
SUBSTANCE: proposed method of arranging a multilayered ice cover for curling envisages formation of an ice underlayer characterised by enhanced hardness and similar to monocrystal ice in terms of structure and slip properties. Initially one provides for freezing on a lower adhesive layer at least 1 mm thick with admixture of a composite in an amount no more than 50 ppm which is represented by water suspension of polytetrafluorethylene and/or a tetrafluorethylene-hexafluorpropylene copolymer and/or perfluordecaline. Then follows the underlayer formation by way of successively freezing on several clear (containing no admixtures) ice layers each no more than 1 mm. After that one provides for freezing pebble embossments onto the underlayer using water with a temperature no less than 60° C; the pebbles contain admixtures of ammonia in an amount from 0.1 ppm to 100 ppm and water suspension of polytetrafluorethylene and/or a tetrafluorethylene-hexafluorpropylene copolymer and/or perfluordecaline in an amount from 50 ppm to 100 ppm.
EFFECT: extended service life of the ice cover structure produced.
3 cl, 1 dwg
FIELD: heating systems.
SUBSTANCE: invention refers to manufacture of artificial ice and can be used in sports and construction industry when building artificial ice rinks, skating tracks, etc. Artificial ice manufacturing method involves freezing of at least one layer which contains additions of water suspension of polytetrafluoroethylene and/or copolymer of tetrafluoroethylene with hexafluoropropylene and/or perfluorodecalin. At least one layer is frozen by being filled with water which contains addition of water suspension of polytetrafluoroethylene and/or copolymer of tetrafluoroethylene with hexafluoropropylene and/or perfluorodecalin, which passed vacuum low-temperature removal of chemical compounds deteriorating ice surface smoothness.
EFFECT: increasing elasticity and sliding properties of ice surface of artificial ice covering owing to pre-cleaning of suspensions of additions, removal of chemical compounds deteriorating ice surface smoothness (vacuum cleaning).
4 ex, 6 cl
SUBSTANCE: manufacturing method of multi-layer ice cover for figure-skating includes formation of underbase with at least one layer which contains additions of ammonia and water suspension of polytetrafluoroethylene and/or copolymer of tetrafluoroethylene with hexafluoropropylene and/or perfluorodecalin. First, low adhesive layer not less than 1 mm thick is frozen, and there added is not more than 50 ppm of the composite- water suspension of polytetrafluoroethylene and/or copolymer of tetrafluoroethylene with hexafluoropropylene and/or perfluorodecalin; then, low modified water layers with various chemical composition of additions are frozen subsequently so that concentration of the addition- water suspension of polytetrafluoroethylene and/or copolymer of tetrafluoroethylene with hexafluoropropylene and/or perfluorodecalin can uniformly increase from the first layer of low modified layers to the final layer of low modified layers within 0.1 ppm to 50 ppm and total thickness of low modified layers is not less than 30 mm, and freezing of upper modified layers is performed immediately after low modified layers have been applied; at that, total thickness of upper modified layers is not less than 10 mm, and each of upper layers contains additions of ammonia in number of 1 ppm to 100 ppm and additions - water suspension of polytetrafluoroethylene and/or copolymer of tetrafluoroethylene with hexafluoropropylene and/or perfluorodecalin in number of 50 ppm to 100 ppm.
EFFECT: manufacturing high-elasticity ice.
5 cl, 1 dwg
FIELD: railway transport.
SUBSTANCE: said utility invention relates to the railway transport, in particular to friction modifiers applied on railway stock wheel treads. Character: the friction and adhesion activator is foam glass.
EFFECT: increase in traction force in difficult track rolling stock operating conditions.
FIELD: petroleum processing and petrochemistry.
SUBSTANCE: invention provides bitumen composition comprising 0.1 to 25% elastomer, 0.1 to 40% solvent, 30 to 99% bitumen, 0.1 to 30% lithium salt of C10-C40-fatty acid or hydroxy-fatty acid, and optionally 0 to 69.70% filler, all concentrations being based on the total weight of bitumen composition and said solvent having general formula (I): (I) wherein R1 represents hydrogen atom or C1-C6-hydrocarbon group and R2 C1-C6-hydrocarbon group, provided that sum of carbon atoms in R1 and R2 is between 5 and 7. Above-mentioned elastomer is a block copolymer including at least two terminal poly(monovinylaromatic hydrocarbon) blocks and at least one central poly(conjugated diene) block. Invention also concerns bitumen composition production process as well as application of composition as cold-laying binding material.
EFFECT: optimized formula of composition and enhanced its binding properties.
9 cl, 3 tbl