Semiconductor band with improved elasticity. RU patent 2510648.
 Semiconductive band with adhered layer / 2510645Semiconductive band represents material with fibrous substrate saturated with current-carrying compound and current-carrying adhered layer. Adhered layer is made of latex based on carboxylated acryl copolymer or vinyl acetate and acrylic ester copolymer with current-carrying compound such as carbon black, graphite, silicone carbide. |
 Copper alloy and method of its production / 2510420Copper alloys is produced at adding hexagonal-system graphite to high-temperature medium at 1200-1250°C in amount sufficient for obtaining the copper alloy with carbon content of 0.01-0.6 wt %. |
 Electroconductive lubricant "uvs superkont" / 2510089Invention relates to an electroconductive lubricant, containing mineral oil, additive, metal powder, such as a highly dispersed copper powder, a stabilising additive. The lubricant additionally contains a thickener, such as ethyl cellulose, at the same time the additive is an organic matrix, which represents salts of high-molecular organic compounds (soap) and higher organic fatty acids, and the stabilising additive is a 30% solution of benzotriazole in acetone at the following content of components, wt %; organic matrix 40, highly dispersed copper powder 30, thickener 20, stabilising additive 5, mineral oil - balance. |
| Conductive pastes / 2509789 Invention relates to conductive pastes for forming metal contacts on the surface of substrates for photovoltaic cells. The conductive paste is substantially free of frit glass. According to one version of the invention, the conductive paste contains organometallic components which form a solid metal oxide phase upon firing and conductive material. The organometallic components are selected from a group which includes metal carboxylates or metal alkoxides, where the metal is boron, aluminium, silicon, bismuth, zinc or vanadium. According to another version, the conductive paste includes multiple precursors which form conductive elements upon firing or heating. The paste is adapted for adhesion to the surface of a substrate and upon firing, forms a solid oxide phase while forming an electrical conductor from conductive materials on the substrate. |
 Current-conducting silver paste for rear electrode of solar cell / 2496166Current-conducting silver paste for rear electrode of solar cell includes fine powder of silver 45-50 wt %, frit 3-9 wt %, preferably 3-6 wt %, and organic bonding agent 46-52 wt %. Silver powder has average size of particles D50 equal to 1.5-5.0 mcm, and 38-48 wt % of silver powder may have average size of particles D50 equal to 2.0-5.0 mcm, preferably 2.5-3.0 mcm, and 2-10 wt % of silver powder may have average size of particles D50 equal to 1.5-4.0 mcm, preferably 1.5-1.8 mcm. Organic binding agent as film-forming one contains ethyl cellulose in quantity of 4-10 wt %. |
 Releasing and re-dispersing nanoparticles of transition metals and their application as ir-radiators / 2494838Invention relates to powder metallurgy, particularly, to production of releasing and re-dispersing nanoparticles of transition metals. These can be used as IR-absorbers, particularly, in transparent thermoplastic or cross-liked polymers for architectural or car glazing applications. Acrylate or methacrylate monomer or oligomer, or polyacrylate or polymethyl acrylate and reducer are added to aqueous solution of transition metal salt. Colloidal solution is either treated by peroxide or subjected to UV- or visible light. Water soluble amine is added to produce stabilised water suspension of transition metal nanoparticles. Nanoparticles are released in evaporation of solvent from said stabilised water suspension or on adding dispersing agent nanoparticles to the latter and re-dispersing said nanoparticles along with dispersing agent in liquid acrylate or methacrylate monomer. |
 Powder for current-conducting pastes, method for production and optimisation of parameters thereof / 2491670Powder for current-conducting pastes is fine metal powder, wherein particles of the powder have pronounced faces obtained by mechanical processing of the particles preferably with an oval shape with centrifugal acceleration. The average size of the particles is less than 1.5 mcm and density of the powder ranges from 4.0 g/cm3 to 8.0 g/cm3. The method of producing and optimising parameters of the powder for current-conducting pastes involves preparing an aqueous metal salt solution, reducing the metal powder by adding the metal salt solution to a solution of a reducing agent, wherein the solution of the reducing agent further contains at least one colloid-forming substance; after reduction, the metal powder is mechanically processed using centrifugal acceleration with a factor ranging from 15 g to 40 g. |
 Device for monitoring of high electric field in synthetic insulating material, in particular for current input through wall / 2488183Device contains remaining ring space between inner surface of the ground shield surrounding the central conductor and the central part of mass of dielectric insulating material to which the central conductor and shield are buried. This ring space is filled with dielectric fluid medium, namely with sulphur hexafluoride (SF6). |
 Tin oxide based electrode / 2483376Tin oxide based electrode, formed from a composition which contains a basic component consisting of tin oxide (SnO2) and additives consisting of CuO, ZnO, as well as additives which alter resistivity. The total amount of CuO and ZnO is not more than about 0.3 wt % and the amount of ZnO is in the range from about 0.1 wt % to about 0.19 wt %. |
| Method of production of coating containing carbon nanotubes, fullerenes and/or graphenes / 2483021 Invention relates to a method of obtaining a coating containing carbon nanotubes, fullerenes and/or graphenes. The method includes application of carbon nanotubes, fullerenes and/or graphenes on the tin-containing coating and addition of carbon nanotubes, fullerenes and/or graphenes in the tin-containing coating by mechanical and/or thermal processing. The application of the obtained base with the coating as an electromechanical part or a frame with external outputs is claimed. |
 Composite reinforcements / 2509653Invention relates to reinforcements, particularly, to alternate-profile reinforcements for production of articles from concrete and aerated concrete by hot moulding at simultaneous effects of aggressive media. Composite reinforcements comprise bar with winding composed by fibrous filler impregnated with epoxy resin-based polymer binder and hardener. Proposed composition contains the following substances, in wt %: fibrous hardener - 60-80 and binder - 20-40 where binder comprises the following components in wt %: epoxy resin - 50-60, amine hardener - 40-50. Said resin comprises the following components, in wt %: diane epoxy resin - 47-80, modifier based on polyesters including glycidyl groups - 10-25, component produced by epoxidation of hydroxyphenylene oligomer from alkyl resorcinol - 10-28%. |
 Polymer composition / 2507227Invention relates to high-strength polymer compositions intended for making articles from composite materials, applying anticorrosive and decorative coatings with high resistance to weather and ultraviolet radiation. The polymer composition contains an adduct of amines with epoxy resins, an active diluent and a product of reacting di- or polyepoxy compounds with nitrogen-containing components, where the nitrogen-containing component used is a mixture consisting of a compound having in its structure one or more tertiary nitrogen atoms and simultaneously one or more functional groups -NCO, -OH, -CH2OH and a compound containing, along with a tertiary nitrogen atom, a primary or secondary amino group, and the reaction is carried out by mixing at temperature ranging from 40°C to 220°C in 10-150 minutes. |
 Method of producing epoxy resin curing agents / 2507226Invention relates to production of epoxy resin curing agents used to prepare epoxy compositions with improved processing properties and minimal toxicity, which enable to produce composite materials with high strength, thermophysical and dielectric properties. The method of producing epoxy resin curing agents involves reacting a liquid or molten aromatic, aliphatic, cycloaliphatic or alkylene aromatic di- or polyamine (B) with cycloaliphatic or aliphatic-cycloaliphatic dioxides (A) with excess amine, after which acrylate (V) and amino alcohol (G) are added to the obtained mixture and the reaction mixture is stirred for 20-180 minutes at T=30-180°C. |
 Polymer composition / 2506291Present invention relates to production of polymer compositions based on epoxy resins and modified amine curing agents, intended for producing high-strength composite materials with high resistance to thermal deformation. Described is a polymer composition based on epoxy resin, active epoxy diluents and nitrogen-containing curing agents intended for producing high-strength composite materials with high resistance to thermal deformation, characterised by that the curing agent is a product of reaction of an amine component with monocarboxylic acids, using as the amine component a mixture consisting of a primary aromatic amine or a mixture of aromatic amines (A), a secondary aliphatic amino alcohol (B) and a tertiary aliphatic amino alcohol (C) in weight ratio A:B:C from 98:0.2:1.8 to 80:5:15, and a monocarboxylic acid (D) is added in form of a 25-80% solution to the monoatomic aliphatic or aromatic alcohol, or ester thereof with a mono- or dicarboxylic acid, in ratio (A+B+C):D from 90:10 to 60:40 per 100% acid, followed by reaction by mixing in a reactor at temperature ranging from 50 to 130°C for 20 to 120 minutes and mixer speed of 100 to 3000 rpm, and additionally contains a thickener, a pigment or a dye, wherein the composition contains the following in pts.wt: epoxy resin - 100, active epoxy diluent - 5-130, curing agent - 15-110, thickener - 5-50, pigment and dye - 0.5-25. |
 Epoxy binder for reinforced plastic / 2505568Binder contains the following, pts.wt: 70-90 polyglycidyl derivative of low-molecular weight phenol-formaldehyde novolac, 10-30 epoxy-diane resin, 3-6 boron trifluoride and benzylamine complex, 60-80 2,2'-bis-(3,5-di-bromo-4-hydroxyphenyl)-propane, 1-3 bis-[3-(3,5-di-tert-butyl-4-oxyphenyl) propyl]phthalate and 90-160 alcohol-acetone mixture with weight ratio of alcohol to acetone of 1:1. |
| Press material for sealing integrated microcircuits / 2505567 Press material for sealing integrated microcircuits contains binder - o-cresol novolac epoxy resin with softening point of 50-65°C, a curing agent - cyan-acetic ester and diglycidyl ether of 1,4-butanediol, an accelerating atent - N1-(3,4-dichlorophenyl)-N,N-dimethylurea, filler - ground quartz, glycidyloxypropyltrimethoxy silane finishing agent, lubricant - oxidised polyethylene wax. |
| Method of making articles from composite / 2505403 Proposed method comprises preparing binder directly before impregnation of fibrous filler. Epoxy-novolac binder with number-average molecular weight of 300 a.u. and weight fraction of epoxy groups of 8-11 are produced by loading 10-28 wt % of product into reactor, said product being obtained by epoxidation of hydroxyphenyl oligomer from alkyl resorcinol, 47-80 wt % of diane epoxy resin and 10-25 wt % of modifier, and by boiling at 60-250°C for 30-180 minutes. Article is shaped by drawing fibrous filler impregnated with binder and hardener via replacement die and helical winding on reinforcing bundle core. |
 Thermosetting epoxy polymer, composite material, method of moulding article from composite material, mould and method of making mould / 2499013Composite material contains a matrix phase made of thermosetting epoxy polymer with magnetite particles and a reinforcing phase made of carbon fibre. The mould for moulding an article from composite material has a housing made of material which is substantially permeable for microwave radiation, with a surface or a back surface which is coated with a layer containing material which is substantially permeable for microwave radiation. |
 Thermosetting resin-based polymer composite material and fibre-filled material containing said resin / 2495056Invention relates to a thermosetting resin-based polymer composite material and fibre-filled material based thereon. The polymer composite material contains thermosetting resol phenol-formaldehyde resin and additionally thermosetting epoxy resin and a thermosetting polyester resin in the following ratio, wt %: thermosetting resol phenol-formaldehyde resin 48-83; thermosetting epoxy resin 3-13; thermosetting polyester resin 14-39. The fibre-filled material contains a thermosetting resin-based polymer composite material and fibre. The fibre used is polyacrylonitrile fibre or glass fibre in the following ratio, pts.wt: thermosetting resin-based polymer composite material 3.2-5.2; fibre 1.0. |
 Epoxy resins and composite materials exhibiting improved combustion properties / 2494126Invention relates to epoxy resin-based composite materials. The epoxy resin-based composition contains: a) 50-70 wt % of a component which is an epoxy resin containing one or more epoxy resins; b) 15-35 wt % of a mixture of thermoplastic materials containing polyetherimide and polyamideimide, where the weight ratio of polyetherimide to polyamideimide ranges from 5:1 to 1:5; and c) 5-25 wt % of a component which is a curing agent, where the epoxy resin composition has sulphur dioxide release level below 100 ppm. Also disclosed is a method of preparing a composition, a component made from an uncured composite, a component made from the composite, where a matrix of the epoxy resin is cured, and a method of producing a prepreg. |
| Method of producing thermoplastic elastomer composition / 2497844 Invention relates to a method of producing a thermoplastic elastomer composition based on polyethylene and chlorosulphonated polyethylene for making various elastic industrial rubber articles by extrusion, pressure moulding and blow moulding. The method is realised by dynamic mixing of polyethylene with chlorosulphonated polyethylene in the presence of a vulcanising system which contains magnesium oxide, a mixture of organic acids and a mixture of sulphur vulcanisation accelerators of a group of thiazoles. At the step of dynamic mixing of polymers, magnesium oxide is added first, followed addition of a mixture of organic acids in a combination with a mixture of sulphur vulcanisation accelerators to carry out dynamic vulcanisation. |
FIELD: electricity.
SUBSTANCE: invention relates to production of semiconductive materials used for corona shielding of high-voltage windings of electrical machines. The invention suggests semiconductive band containing fibrous substrate with semiconductive compound applied on its top including current-conductive filler and polymer binding agent made of chlorosulphonated polyethylene mixed up with polyfucntional and multifunctional epoxy resins, anhydride and aerosil.
EFFECT: suggested semiconductive band has improved elasticity allowing its application without folds along the whole length of rods of high-voltage electrical machines.
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The invention relates to the electrical engineering, in particular to the production of semi-conducting materials used for protivokariosnoe protection of high-voltage windings of electrical machines.
The efficiency of semi-conductive coating of high-voltage windings of electrical machines largely determined by the quality of its application to the terminals. To prevent the concentration of the electric field strength of semi-conductive surface must be flat, without wrinkles, especially on nonlinear parts rods. This can be achieved by increasing the elasticity of semi-conductive tape, allowing to apply the tape without folds along the length of the rods of high-voltage electrical machines.
The closest solution of similar tasks is a semi-conducting tape for protivokariosnoe protection of high-voltage windings of electrical machines, containing fiber substrate, impregnated binder based on butadiene-nitrile rubber, catalysts knitting and conductive fillers (Patent RU №2150760 from 10.11.1998,, CL NV 1/00; NV 1/24; NC 3/40). The tape does not have sufficient chemical resistance to boxinginsider the compound, and not elastic enough to ensure dense and uniform contact with the winding insulation.
The present invention is development of semi-conductive tape with a rated electrical resistance of high elasticity.
To solve this problem it is offered semi-conducting tape containing fibrous substrate glass thickness of 30-200 mm with a deposited semiconductor composition, comprising a binder - chlorosulphurized polyethylene (molecular weight 20-40 thousand), monofunctional epoxy resin (monoglycidyl ether n-butanol, butylalcohol, 2-ethylhexanol, alkylphenol, tertbutylphenyl), multifunctional epoxy resin (Dianov, Apoksiomen, nitrogen-containing, cycloaliphatic epoxy number 15-30), anhydride (isomethyltetrahydrophthalic, andilly, methylenedioxy, phthalic, hexahydrophthalic), amine catalyst type, organic solvent, conductive fillers (carbon black, graphite, silicon carbide) in the following ratio, mass%:
Chlorosulphurized polyethylene
1-5Monofunctional epoxy resin
5-20Multifunctional epoxy resin
0,1-1,0Anhydride
3-10The catalyst
0,01-0,1
Conductive filler
15-50 Aerosil 0,1-2,0Organic solvent
30-60When the content of components in semi-conducting tape,% Mas.:
Semi-conducting composition
15-35Substrate
65-85To obtain semi-conducting tape, according to the invention, first prepare semi-conducting a composition based on the above ratio of ingredients in it. As conductive filler serve as carbon black, graphite, silicon carbide or their mixtures. The dissolution of monofunctional epoxide, anhydride, chlorosulfonated polyethylene, epoxy resin, catalyst spend in the amalgamator at room temperature. Solid components fray in the obtained solution of the bead or ball mill to the dispersity of 5-15 micron.
Song put on tape by passing through the bath impregnating machines with subsequent drying at the temperature 70-160 OC for 2-10 minutes.
The invention is illustrated by the examples given in the table.
Table No.Material name, the standard indicators
Option 1
Option 2
PPL-1 p/p 1.Chlorosulphurized polyethylene
1,8 1,5 9,7 2.Monoglycidyl ether n-butanol
9,0 - -Monoglycidyl ether alkylphenol
- 8,6 3.Methylenedioxy anhydride
3,9 - -Isomethyltetrahydrophthalic anhydride
- 3,7 4.Epoxy resin ED-20
0,4 - 1,9Epoxy up-643
- 0,3 5.Catalyst
0,01 0,02 0,03 6. Aerosil 0,4 1,3 - 7.Technical carbon
10,5 2,6 7,6 8.Silicon carbide
- 32,3 9. Solvent else else else 10.Bending stiffness, N
0,25 0,50 1,5 11.Specific surface electrical resistance, Ohm
3·10 3 4·10 8 4·10 3According to the invention of semi-conductive tape has the increased elasticity options for low impedance and high impedance execution.
Semi-conductive tape for protivokariosnoe protection of high-voltage windings of electrical machines, containing fibrous substrate coated with semi-conducting composition, including conductive fillers and polymer binder, notable as a polymer binder is used chlorosulphurized polyethylene mixed with poly-and mono-functional epoxy resins anhydride and catalyst in the following ratio of ingredients in the composition,% Mas.:
Chlorosulphurized polyethylene
- 1-5Monofunctional epoxy resin
- 5-20Multifunctional epoxy resin
- 0,1-1,0
Anhydride
- 3-10The catalyst
- 0,01-0,1
Conductive filler
- 15-50 Aerosil- 0,1-2,0
Organic solvent
- 30-60when the content of components in semi-conducting tape,% Mas.:
Semi-conducting composition
- 15-35Substrate
- 65-85