(57) Abstract:Usage: the invention relates to refractory insulating materials. The inventive insulating material layer contains slyudinitovyh paper substrate of glass or basalt fabric and adhesive composition in the following ratio, wt. hours: deoxyoligonucleotide (,) 50-200, oligomerisation 15-40, aminopropyltriethoxysilane 1-6, tetrabutoxide 1-6, toluene 200-600. The material according to the invention has a high resistance, mechanical and electrical strength and flexibility. The invention relates to electrical engineering materials, namely, fire-resistant insulating materials intended primarily for the protection of cables, operating in high temperature conditions.The prior art insulating materials based on slyudinitovyh paper impregnated with silicone binder (see and.with. USSR N 237218, CL H 01 3/04, 1969.with. USSR N 649046, CL H 01 3/00, 1979 Pat. USA N 3548789, CL 174-122, 1970 CBL. Japan's bid N 51-9000, class C 08 I 59/18, 1976). However, the physico-mechanical properties of such insulating material is inadequate is m based on the epoxy resin layer slyudinitovyh of paper and a layer of glass (see A. with. USSR N 170649, class C 08 I 63/02, 1964.with. USSR N 670592, CL H 01 3/40, 1979.with. USSR N 1749909, CL H 01 3/04, 1992).The disadvantage of these insulating materials can be attributed to the technological complexity of manufacturing and low elasticity.Closest to the invention is an insulating material containing layer slyudinitovyh paper, a layer of fiberglass and binder based on hydroxyl-containing low molecular weight polyorganosiloxane (see and.with. USSR N 542247, CL H 01 3/00, 1977). At a sufficiently high resistance and electric strength of this material has not excluded the possibility of delamination slyudinitovyh paper from fiberglass.The invention is directed to the creation of insulating material having a high resistance, mechanical and electrical strength, flexibility in excluding the possibility of exfoliation slyudinitovyh paper on a substrate of glass or basalt fabric.The solution of the problem provided by the fact that the insulating material containing layer slyudinitovyh paper substrate of glass and a binder based on silicone polymers according to the invention, as a binder used-200
Oligomerisation (MQ-oligomer) 15-40
Used sljudinitovye paper made from Muscovite by termogidrodinamicheskoe processing with a surface density of 50 to 150 g/m2or made of Muscovite or phlogopite by hydro-mechanical cleavage (without heat treatment) with a surface density of 80 to 250 g/m2and as the substrate used fiberglass woven from filament yarn weighing from 24 to 62 g/m2.You can use as the substrate of basalt woven fabrics of filament yarn weighing from 24 to 140 g/m2.The proposed structure of the adhesive composition provides flexibility, additional dielectric strength and temperature resistant insulating material, which eliminates the possibility of delamination slyudinitovyh paper from the substrate even at temperatures above 800oC and results in high physico-mechanical properties of refractory insulation, allowing its use for protection, mainly, security cables, operating in conditions of emergency shall have a roll of fiberglass woven from filament yarn weighing 30 g/m2and roll slyudinitovyh paper from the Muscovite weighing 75 g/m2. On fiberglass, moving with the speed of 2-10 m/min, the dipping method is continuously applied adhesive composition containing, in weight. h:
Deoxyoligonucleotide (,) 100
Oligomerisation (MQ-oligomer) 25
The excess glue is removed by the scraper device. The soaked fiberglass continuously stack sljudinitovye paper, which is impregnated with glue. Received thus stekloduvnoe cloth is fed into the drying chamber at a temperature of 80-140oC the evaporation of the solvent. After drying, the material is cooled at room temperature and wound into a roll. The content of the binder in the finished insulating material 9 to 36 wt. mostly, 15% dielectric strength of the material is not less than 2 kV/layer.Example 2. Process analogous to example 1. Used fiberglass weighing 35 g/m2and sljudinitovye paper from phlogopite weighing 120 g/m2and, the adhesive composition has the following relationship to the 30
The electric density of the material is not less than 1.8 kV/layer.Example 3. Process analogous to example 1. At the same time as the substrate using a fabric with a surface density of 35 g/m2and sljudinitovye paper from phlogopite weighing 160 g/m2and, the adhesive composition has the following ratio of components, wt.h.Deoxyoligonucleotide (,) 80
The electric strength of the material is not less than 2.0 kV/layer. Insulating material containing layer slyudinitovyh paper substrate on the basis of the fabric of inorganic fibers and a binder based on silicone polymers, characterized in that the binder contains additional tetrabutoxide and toluene, as well as silicone polymers deoxyoligonucleotide (,), oligomerisation and-aminopropyltriethoxysilane in the following ratio, wt.h.Deoxyoligonucleotide (,) 50 200
FIELD: electrical engineering; insulating materials for wires or commutators of electrical machines.
SUBSTANCE: proposed mica base insulating material has mica paper layer, backing of inorganic fiber (glass or basalt), and binders, such as betulinic and adipic acids having molecular mass of 10 000 to 15 000. Such binders of desired molecular mass can be easily produced.
EFFECT: enhanced mechanical strength, heat resistance, and flexibility; facilitated manufacture.
1 cl, 2 tbl, 11 ex
FIELD: insulation materials.
SUBSTANCE: invention relates to electroinsulation materials for electric machine windings and aims at creating electroinsulation material possessing high heat resistance (155-180°C), high electrical and mechanical strengths, environmental safety, and which would retain its flexibility over a long storage period. Electroinsulation material according to invention contains mica paper layer, one or two substrate made of glass fabric or from glass fabric and polyester or polyimide film, and binder based on unsaturated nitrogen-containing polyester prepared by condensation of maleic anhydride and polyatomic acids with N-(β-hydroxyethyl)-1,2-amidophthalic acid, N-(β-hydroxyethyl)-1,2-amidoisomethyltetrahydrophtalic acid, N-(β-hydroxyethyl)-1,2-amidoendomethylene trahydrophtalic acid, or mixture thereof (39.6-40.9 wt parts), polymerizable diluent: oligoether acrylate (36.0-48.7 wt parts), and peroxide initiator (0.8-1.0 wt parts), oligoether acrylate including also target additives (2.4-14.0 wt parts), and optionally low-molecular weight epoxy acid as second binder (2.0-12.1 wt parts).
EFFECT: improved performance characteristics.
2 tbl, 13 ex
FIELD: physics; electricity.
SUBSTANCE: fibre glass layer contains out-of-wind fibre glass. It can be woven fibre glass fabric. The material is applied mainly for covering electric conductor, such as wire applicable for high-temperature environments and coils for high-voltage electric motors and generators.
EFFECT: possibility of production of thinner insulation material without deterioration of mechanical or electric properties.
19 cl, 3 tbl, 3 ex
SUBSTANCE: invention relates to a heat-resistant wire or cable with improved operational properties designed for use in demanding or extreme conditions, for example in well drilling or field development, in industrial, military aerospace, naval fields, as well as in the motorcar, railway and public transport. Such cables can be subjected to extreme temperatures, corrosive substances or atmospheres or fire. The wire or cable comprises a conductor and a polymer sheath consisting of an internal and an external layer. One layer is tape made of polyetheretherketone (PEEK) and has thickness of 5-150 mcm. The second layer is fire-resistant and is made of a siloxane polymer or a polymer based on silicon dioxide as a polymer matrix. The PEEK tape can be combined with a mica layer or a layer which is polymer tape with mica particles.
EFFECT: invention increases fire-resistance of the sheath, its flexibility and resistance to mechanical stress, enables to obtain a wire or cable with a lower weight and diameter.
12 cl, 5 dwg
SUBSTANCE: improved electrically insulating tape (16) is offered which comprises the protective layer (20) and the electrically insulating layer (18) joined with the protective layer (20). At least, one of either the electrically insulating layer (18) or the protective layer (20) includes a set of formed apertures (26) to improve penetration of impregnating pitch into the insulating tape (16) during pitch impregnation.
EFFECT: invention provides optimum impregnation of the tape that improves the ability to resist to impact of voltage and premature breakdown and accident.
10 cl, 11 dwg
SUBSTANCE: invention relates to heat-resistant polymer materials based on organosilicon binder for making electric insulating materials and developing design of winding wires. Composition includes organosilicon resins (A) and (B), poly(dimethyl siloxane) (C), poly(dimethyl methyl hydride siloxane) (D), and platinum catalyst (E). Design of winding wire contains conductor thread coated with two-layer, thermally treated insulation, first layer therein is made from mica-containing tape consisting of electrically insulating glass fabric and mica paper, impregnated and glued together with said composition, and second layer therein is made of polyimide fluoroplastic film.
EFFECT: technical result of invention is producing electric insulating materials with high flexibility and fire-resistance, and also higher corona-proofness and flexibility of wire insulation.
4 cl, 1 tbl, 7 ex
SUBSTANCE: invention relates to high performance, high temperature resistant wires and cables as well as to a method for production thereof. Said wires and cables are fire-resistant and are used in heavy operating conditions, such as drilling or mining operations, industrial, military, aerospace and sea applications. Tape (20) comprises a laminated or co-extruded insulating first layer (24) of a polymer matrix in which mica particles are dispersed and second layer (26) of a polyether ether ketone (PEEK) or a blend or alloy thereof containing at least 50 wt% of PEEK. Surface of at least one said layer, opposite other said layer, is coated with fluoropolymer film (25). Sid tape can be used to form a multilayer coating on conductor (10) such as an electric wire. Outer protective layer (28) of a fluoropolymer such as PTFE may be applied around wrapped tape, by wrapping or extrusion.
EFFECT: technical result is production of wires and cables with good insulation, high temperature resistance, and also having improved mechanical properties at high temperatures.
59 cl, 4 dwg, 1 tbl
FIELD: electrical engineering.
SUBSTANCE: silicon rubber based insulating material proposed for insulating cables and wires has polyethylene, target dope in the form of ethylene copolymer with vinyl acetate, and heat regulator. This insulating material for cables and wires is distinguished by desired hardness and flexibility.
EFFECT: enhanced speed of composition radiation cross-linking.
1 cl, 1 tbl
SUBSTANCE: invention concerns low-viscosity siloxane compositions which can be solidified at room temperature and form elastomer materials applicable as dielectrics and insulators. Invention claims low-viscosity siloxane composition including, weight parts: polyorganosiloxanediol - polydimethylsiloxanediol or polydimethyl(methylphenyl) siloxanediol or their mix at the molar weight ratio of (2÷1):1, 15÷100 thousand - 100, partial tetraethoxysilane hydrolysis product - 4.0÷7.2, amonisilane selected out of group including γ-aminopropyltriethoxysilane or its mix with (3-aminoisopropyltriethoxysilane or diethylamonipropyltetraethoxysilane - 0.5÷1.0. Composition can include fine-dispersed filler quartz, silicon dioxide or dolomite powder, iron, titanium, aluminium, chrome or zinc oxides or their mixes, boron or aluminium nitrides, or mixes of carbon black with metal oxides, oligodimethylsiloxane.
EFFECT: low-viscosity siloxane composition for obtainment of elastic dielectric material without corrosion effect on non-ferrous metals, with high dielectric properties, enhanced substrate adhesion and reduced toxicity, at room temperature.
8 cl, 2 tbl, 2 ex
FIELD: electrical engineering.
SUBSTANCE: invention relates to electrical engineering, particularly to insulation materials, namely to silicon rubber material containing mix of poly alkylsiloxane (A) and poly arylsiloxane (B). Said mix comprises 3 to 30 weight parts of arylsiloxane (B) per 100 weight parts of poly alkylsiloxane (A). Invention relates also to the method of producing such material. Proposed material can be used for various applications at low temperatures, one of them pertaining to electric insulation.
EFFECT: reduced viscosity factor at minus 50°C and lower costs.
SUBSTANCE: insulating materials are radiation-cross linked composition based on hydrogen-containing fluoropolymers with polyallyl ethers of polycarboxylic acids acting as cross linking agents. The radiation-cross linked composition based on fluorocarbon polymer contains a hydrogen-containing fluorocarbon polymer with a cross linking agent which is triallyl isocyanurate, and zinc oxide. The fluorocarbon polymeer is an alternating modified copolymer of tetrafluoroethylene and ethylene of equimolar composition, which is such a mixture of two modified copolymers of tetrafluoroethylene and ethylene with different melt flow indices, where the first copolymer of tetrafluoroethylene and ethylene has melt flow index of 60-90 g/10 min in a prepared mixture with CuI2 and with content of the latter between 0.1 and 1.0 wt %, and the other copolymer of tetrafluoroethylene and ethylene is part of the composition with melt flow index of 20-35 g/10 min.
EFFECT: composition has high manufacturability during extrusion and provides high mechanical strength, hardness, wear resistance of the insulation material made from the composition.
SUBSTANCE: disconnecting switch for interruption of current circuit under voltage which is at least 100 kV relative to the ground includes two groups (14, 15) of elongated bar-shaped support insulators (16) provided with possibility of being installed on the ground and supporting each of ends (19, 20) of wire at high altitude above the ground. Blade (21) of disconnecting switch is connected to one or both of the above wire ends and has the possibility of being moved for connection and disconnection of those ends. Support insulator is made from insulating water-proof composite material on the basis of rubber, containing rubber introduced to fire-resistant filler which is resistant to corona discharge. Disconnecting switch and support insulator can be used in converter station of transfer system of high voltage on direct current.
EFFECT: decreasing the height of support insulators and due to this the height of disconnecting switch.
19 cl, 2 dwg
SUBSTANCE: surface modified electric insulation system used for electric insulation of an external plant, which makes it possible for garbage and contaminants deposited on the surface to be removed by rain, i.e. self-cleaned, has a superhydrophobic surface containing a composition of a hardened or a cured synthetic polymer, which contains at least one filler and other additives, if required, in which at least one filler is selected from the group containing inorganic oxides, inorganic hydroxides and inorganic metahydroxides, and the surface of the electric insulation system represents a structured surface with its micro- and nano-size characteristics, besides, the specified surface is coated with a liquid hydrophobic compound; a method is also described how to manufacture an electric insulation system.
EFFECT: production of highly resistant and durable electric insulation.
SUBSTANCE: invention relates to insulation materials used in the cable industry, which are radiation cross-linked fluoropolymer compositions based on an ethylene-tetrafluoroethylene copolymer. The method involves adding a cross-linking agent - trialyl isocyanurate - to a polymer base which contains a granular ethylene-tetrafluoroethylene copolymer (brand - Tefzel). Said agent is added in form of its 20% concentrate which is obtained by mixing molten trialyl isocyanurate with granules of the ethylene-tetrafluoroethylene copolymer (Tefzel), wherein the concentrate is added to the polymer base in ratio of 1 part concentrate to 4-7 parts granules of the polymer base.
EFFECT: high uniformity of distribution of the cross-linking agent in the composition without formation of gel-like inclusions.
2 cl, 2 tbl
SUBSTANCE: organic-silicon electric-insulating water-proof composition for high-voltage insulators as silicone low-molecular rubber contains rubber of SKTN grade, as low-molecular organic-silicon fluid - organic-silicon fluid of 119-215 grade, as hardener - methyl triacetoxysilan. Per each 100.0 weight parts of rubber this composition contains low-molecular organic-silicon fluid (1.25-2.5) weight parts, aluminium hydrate (5-15.0) weight parts, acetylene black (0.5-2.5) weight parts and hardener (2.5-6.5) weight parts.
EFFECT: improving reliability and increasing service life of cured in coating of electric-insulating construction based on water-proof electric-insulating composition by determining optimum compound and ratio of water-proof composition components.
3 cl, 4 tbl
SUBSTANCE: hydrophobic organosilicic compound for electric insulating structures is made on the basis of organosilicic compositions of cold hardening. The compound contains silicon low-molecular rubber, a filler, and also a hardener or a catalyst. The compound in vulcanised condition is characterised by the value of the edge angle of wetting from 60° to 179°, tracking erosion resistance at duration of tests making at least 500 hours at working voltages of 6-750 kV, and also with arc resistance characterised with arc current value of at least 100 mA with duration of effect of at least 600 s.
EFFECT: increased reliability and higher service life of a hydrophobic electric insulating coating on the basis of a compound, which is provided by composition and ratio of compound components and specified operating properties of a coating in vulcanised condition.
5 cl, 14 dwg
SUBSTANCE: invention relates to elastic insulation material based on caoutchouc mixture with resistance to impact of high temperatures. Insulation material for application at temperatures higher than 130°C, which is easily applied on complex components, requiring insulation, also fills internal slots, is insulation material, in which at least part of caoutchouc mixture is not cross-linked and can be plastically deformed, where Mooney viscosity ML(1+4) of mixture at 23°C, determined in accordance with part 3 of DIN 53523 standard, constitutes from 5 to 20 Mooney units. caoutchouc mixture possesses porous structure and contains from 2 to 100 wt.p. of microspheres per 100 wt.p. of caoutchouc for formation of porous structure.
EFFECT: improvement of material properties.
8 cl, 1 tbl, 1 ex