Casting compound. RU patent 2521440.
 Wire enamel having high adhesion to electric wires / 2481366Invention can be used in producing wires with enamel insulation for motors, coils and transformers. The wire enamel contains binder, an organic solvent, auxiliary substances and additives, an adhesion promoter selected from imidazole, pyrrolidone, amidocarboxylic acids, derivatives thereof and mixtures thereof. The method of coating electric wires with the enamel involves providing an electric wire, applying the enamel and curing. |
 Insulating material and method of producing said material / 2470396Invention relates to insulating material, an insulating device, a method of producing the insulating material and an alveole for embedding into the insulating material. The alveole has supports with a size which enables a gas molecule to pass through the wall and prevents a polymer molecule from passing into the alveole from the outside. The insulating material contains multiple alveoli with rarefaction which is lower than a Paschen law minimum. The insulating material contains multiple alveoli with pressure which is higher than a Paschen law minimum. |
 Nonlinear dielectrics used as electric insulating material / 2468458Electrical machine containing winding (34) made of electric insulating material. Electrical machine also includes insulating layer (38) arranged around at least a part of winding (34) which dielectric constant changes depending on voltage. Nano filler is added to insulating layer. |
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Insulation of conductors with improved separability from processed crushed stone / 2438201 Invention relates to insulation with improved separability from processed crushed stone, provided as single-layer or multiple layer insulation that surrounds an electric conductor, where the principle consists in the fact that at least one layer of insulation is made of magnetic material, and at the same time at least one layer is made of non-conducting material. This magnetic material is actually produced as a mixture of the main component of magnetic and non-magnetic material, whereas it is especially advantageous, if the content of the main component of magnetic material in separate insulation layers makes 5-60% in weight, and the balance up to 100% is the main component of non-magnetic material, all relatively to the weight of separate layers, or even better, if the content of the main component of magnetic material of separate insulation layers makes 10-30% in weight relative to the weight of separate insulation layers. Different compositions of used magnetic materials are specified. |
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Field control tape based on varistor / 2404468 Particles of alloyed ZnO are produced by grinding of sintered ZnO unit, by means of grinding or crushing of calcinated granulated particles, or grinding of calcinated or sintered tape (tape-casting). Versions of realisation, inter alia, are related to hollow microvaristor particles of ZnO produced by granulation method, having lower average density and having diametres in the range of much lower than 90 micrometre; and to compounding of ZnO filler in binders used for tape impregnation. Produced tapes are flexible, preferably self-adhesive and have strong non-linear electric resistance. These tapes are useful for protection of areas with high voltage in electric components. |
 Non-combustible cable composition / 2382427Invention relates to the cable industry, and more specifically to preparation of a non-combustible composition meant for fire protection of electrical cables, as well as for protecting cables from corrosion and mechanical damage. In order to provide good operational characteristics and technological effectiveness, the non-combustible cable composition contains 25-70 wt % metal hydroxides as antipyrene, 20-60 wt % thermoplastic binder, as well as 1-20 wt % resin and 1-20 wt % plasticisers as an additive. |
 Method of making impregnated tape for insulating electrical machines / 2357312Present invention relates to electrical engineering, particularly to the method of making impregnated mica-containing tape. Mica paper is stuck onto a substrate made from fibreglass and the fabric of the work piece is then impregnated with a polyetherimide compound with viscosity 100-200 seconds on B3-4, using a lacquering shaft on the side of the mica paper of the fabric of the work piece. After that final impregnation of the mica paper is done on a passing heated shaft at 30-80°C temperature. |
 Electrical heating element with multi-layer insulating structure (versions) / 2342807Invention relates to electrical heating cable. Electrical heating cable includes heat conductor and insulating polytetrafluoroethylene capsules. One of the capsules is represented with heating conductor insulation, the other one is the external enclosure. Insulation layer is produced from the fluoropolymer melt. The second version of the heating cable design provides for including grounding conductor, which fully covers the external side of grounding conductor, and shock-absorbing layer made of fluoropolymer melt and positioned between grounding conductor and protective layer. Electric heating cable may contain parallel un-insulated feeding conductor and heating wire. Shock-absorbing layers may be produced from polytetrafluoroethylene co-polymer. |
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Paste preparation process / 2304458 Invention relates to manufacture of gas-discharge indicator panels and provides a method for preparing pastes used to form elements of gas-discharge indicator panels, which method comprises preparation of filler powder, reduction from solution, and washing with organic solvent having boiling temperature T1=100-200°C. This solvent may be the same as is used in organic binder composition and, when another solvent is used, the latter is selected from those having boiling temperatures T2 meeting the following inequality: T1 ≤ 0.8T2. |
 Insulation covering of electric drilling string separator / 2278258Covering comprises steel substrate, damping layer, insulation layer and glass tissue layer, which are overlapped and connected to the substrate. The damping layer has nickel-aluminum base and is applied by gas-thermal spraying method. Insulation layer is formed of metal oxides, for instance of aluminum oxide, is impregnated with enamel or varnish and is applied by the same method. Glass tissue layer is impregnated with mixture including epoxy resin and metal oxide filler. |
 Dielectric polymeric foam and its utilization in production of lenses for radio waves / 2263124The invention is pertaining to a dielectric polymeric foam and its utilization in production of lenses for radio waves. The dielectric polymeric foam is intended for utilization in the capacity of different dielectric materials, including as the material for production of spherical lenses for radio waves and Luneberg lens. The polymeric foam has a dielectric permeability of no less than 1.5 at 12 GHz and 25 °C and is produced by a foaming of the polymeric composition, which contains a synthetic polymetric compound and one or more dielectric inorganic filler. The filler is selected from a fibrous titanate of the alkaline-earth metal and a lamellar titanate of the alkaline-earth metal. The produced dielectric polymeric foam has good and uniform dielectric features. |
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Insulation covering of electric drilling string separator / 2278258 Covering comprises steel substrate, damping layer, insulation layer and glass tissue layer, which are overlapped and connected to the substrate. The damping layer has nickel-aluminum base and is applied by gas-thermal spraying method. Insulation layer is formed of metal oxides, for instance of aluminum oxide, is impregnated with enamel or varnish and is applied by the same method. Glass tissue layer is impregnated with mixture including epoxy resin and metal oxide filler. |
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Paste preparation process / 2304458 Invention relates to manufacture of gas-discharge indicator panels and provides a method for preparing pastes used to form elements of gas-discharge indicator panels, which method comprises preparation of filler powder, reduction from solution, and washing with organic solvent having boiling temperature T1=100-200°C. This solvent may be the same as is used in organic binder composition and, when another solvent is used, the latter is selected from those having boiling temperatures T2 meeting the following inequality: T1 ≤ 0.8T2. |
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Electrical heating element with multi-layer insulating structure (versions) / 2342807 Invention relates to electrical heating cable. Electrical heating cable includes heat conductor and insulating polytetrafluoroethylene capsules. One of the capsules is represented with heating conductor insulation, the other one is the external enclosure. Insulation layer is produced from the fluoropolymer melt. The second version of the heating cable design provides for including grounding conductor, which fully covers the external side of grounding conductor, and shock-absorbing layer made of fluoropolymer melt and positioned between grounding conductor and protective layer. Electric heating cable may contain parallel un-insulated feeding conductor and heating wire. Shock-absorbing layers may be produced from polytetrafluoroethylene co-polymer. |
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Method of making impregnated tape for insulating electrical machines / 2357312 Present invention relates to electrical engineering, particularly to the method of making impregnated mica-containing tape. Mica paper is stuck onto a substrate made from fibreglass and the fabric of the work piece is then impregnated with a polyetherimide compound with viscosity 100-200 seconds on B3-4, using a lacquering shaft on the side of the mica paper of the fabric of the work piece. After that final impregnation of the mica paper is done on a passing heated shaft at 30-80°C temperature. |
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Non-combustible cable composition / 2382427 Invention relates to the cable industry, and more specifically to preparation of a non-combustible composition meant for fire protection of electrical cables, as well as for protecting cables from corrosion and mechanical damage. In order to provide good operational characteristics and technological effectiveness, the non-combustible cable composition contains 25-70 wt % metal hydroxides as antipyrene, 20-60 wt % thermoplastic binder, as well as 1-20 wt % resin and 1-20 wt % plasticisers as an additive. |
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Field control tape based on varistor / 2404468 Particles of alloyed ZnO are produced by grinding of sintered ZnO unit, by means of grinding or crushing of calcinated granulated particles, or grinding of calcinated or sintered tape (tape-casting). Versions of realisation, inter alia, are related to hollow microvaristor particles of ZnO produced by granulation method, having lower average density and having diametres in the range of much lower than 90 micrometre; and to compounding of ZnO filler in binders used for tape impregnation. Produced tapes are flexible, preferably self-adhesive and have strong non-linear electric resistance. These tapes are useful for protection of areas with high voltage in electric components. |
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Insulation of conductors with improved separability from processed crushed stone / 2438201 Invention relates to insulation with improved separability from processed crushed stone, provided as single-layer or multiple layer insulation that surrounds an electric conductor, where the principle consists in the fact that at least one layer of insulation is made of magnetic material, and at the same time at least one layer is made of non-conducting material. This magnetic material is actually produced as a mixture of the main component of magnetic and non-magnetic material, whereas it is especially advantageous, if the content of the main component of magnetic material in separate insulation layers makes 5-60% in weight, and the balance up to 100% is the main component of non-magnetic material, all relatively to the weight of separate layers, or even better, if the content of the main component of magnetic material of separate insulation layers makes 10-30% in weight relative to the weight of separate insulation layers. Different compositions of used magnetic materials are specified. |
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Nonlinear dielectrics used as electric insulating material / 2468458 Electrical machine containing winding (34) made of electric insulating material. Electrical machine also includes insulating layer (38) arranged around at least a part of winding (34) which dielectric constant changes depending on voltage. Nano filler is added to insulating layer. |
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Insulating material and method of producing said material / 2470396 Invention relates to insulating material, an insulating device, a method of producing the insulating material and an alveole for embedding into the insulating material. The alveole has supports with a size which enables a gas molecule to pass through the wall and prevents a polymer molecule from passing into the alveole from the outside. The insulating material contains multiple alveoli with rarefaction which is lower than a Paschen law minimum. The insulating material contains multiple alveoli with pressure which is higher than a Paschen law minimum. |
FIELD: chemistry.
SUBSTANCE: casting compound includes an epoxy diane resin ED-20 in an amount 100 wt. p., a hardener, a plastisiser - trichloroethylphosphate (TCEP) and a filling agent - crushed basalt with a particle size of 125-315 mcm, and as a hardener it contains polyethylenepolyamine PEPA with the following component ratio, wt. p.: epoxy diane resin ED-20 - 100, polyethylenepolyamine PEPA - 10-15; trichloroethylphosphate TCEP - 20-30; crushed basalt - 40-60.
EFFECT: reduced number of steps of the compound hardening.
1 tbl
The invention relates to the electrical insulation filling the compounds, which can be used, in particular, as a material for monolithic bases of radio engineering circuits.
Known epoxy molding compound on the basis of epoxy Dianov resin, polyethylenpolyamine or Polyoxypropylenediamine, ground talc, mica ground or aluminium hydroxide, pigment, dimethyltrimethylene [1].
However, this compound has a high absorption rate (1.3%), the lowest limit of the tensile strength at -60 degrees C and low oxygen index. To obtain coverage from this potting compound capacitors install form (rubber or plastic) and pour the prepared compound at room temperature, and then utverjdayut at the following mode: flash off at room temperature for at least 20 hours, then termootdelenii at 100 degrees C 8 hours
Also known dielectric filling compound, including epoxy Dianov resin, hardener amine type, active thinner, characterized in that it contains two active diluent: triglyceridemia aired polyoxypropylene and monoglycidyl ether n-butanol, as amine hardener type - a mixture of aliphatic amine and low-molecular polyamide resin [2].
The compound does not have sufficient elasticity.
These compounds are designed for electric insulation of electric connectors, sensors, controls electroradiator, chips in products that are experiencing high vibration and shock.
Close in composition to offer molding compound is the insulating compound assignment based on epoxy Dianov resin ED-20, polyamide hardener-300, modifier dibutilftalata following composition, mass[3]:
epoxy Dianov resin ED-20 - 100
polyamide hardener-300 - 30
the modifier dibutilftalata - 30.
The compound is prepared before use. In epoxy resin is injected modifier - dibutilftalata, the system homogenized mixing and a hardener in the stoichiometric ratio of the resin-hardener.
The curing process proceeds in the following mode:
"cold condensation" (20±2 degrees C), 24 h
dauvergne at 140 C to 5 h and 160 degrees C - 1,5 hours
This mode provides the degree of crosslinking to 94%.
The disadvantage of this compound is low oxygen index and impact strength, and high mass loss when ignited in the air.
The objective of the invention is to increase toughness, oxygen index and the decline of weight loss when ignited compound in the air.
The task is achieved by filling compound, including epoxy Dianov resin ED-20 in the amount of 100 mass and hardener, additionally contains a plasticizer - trichloroethylphosphate (TCHEPH) and a filler - crushed basalt with particle size 125-315 microns, as hardener contains polyethylenepolyamine PEPA in the following ratio of components, mass. including:
epoxy Dianov resin ED-20 - 100
the polyethylenepolyamine PEPA - 10-15
trichloroethylphosphate TCHEPH - 20-30
crushed basalt - 40-60.
New in this compound is used as a plasticizer - trichloroethylphosphate (TCHEPH), and as filler crushed rocks of basalt with particle size 125-315 microns.
The proposed compound is prepared before use. In epoxy resin is injected modifier - trichloroethylphosphate and filler - basalt, homogenized system mixing and a hardener in the stoichiometric ratio of the resin-hardener.
The curing process proceeds in the following mode:
"cold condensation" (20±2 degrees C), 24 h
dauvergne at 90 deg C 0,25 hours
This mode provides the degree of crosslinking to 94%.
The invention can be illustrated by the following examples.
Example 1. To obtain compound prepare the mixture in the following ratio of components, mass. including:
epoxy Dianov resin ED-20 - 100
the polyethylenepolyamine PEPA - 10
trichloroethylphosphate TCHEPH - 20
basalt with a particle size of 140 m - 40.
Example 2. To obtain compound prepare the mixture in the following ratio of components, mass. including:
epoxy Dianov resin ED-20 - 100
the polyethylenepolyamine PEPA - 15
trichloroethylphosphate TCHEPH - 30
basalt with a particle size of 140 m - 50.
Example 3. To obtain compound prepare the mixture in the following ratio of components, mass. including:
epoxy Dianov resin ED-20 - 100
the polyethylenepolyamine PEPA - 15
trichloroethylphosphate TCHEPH - 30
basalt with a particle size of 140 m - 60.
Example 4. To obtain compound prepare the mixture in the following ratio of components, mass. including:
epoxy Dianov resin ED-20 - 100
the polyethylenepolyamine PEPA - 15
trichloroethylphosphate TCHEPH - 30
basalt with a particle size of 125 microns - 50.
Example 5. To obtain compound prepare the mixture in the following ratio of components, mass. including:
epoxy Dianov resin ED-20 - 100
the polyethylenepolyamine PEPA - 15
trichloroethylphosphate TCHEPH - 30
basalt with particle size 315 mm - 50.
The number of hardener less than 10 mass will lead to insufficient cure songs, and more than 15 mass will lead to the over allocation hardener. All compounds containing 40 to 60 mass basalt with different size particles of high properties of the prototype. The highest physical-chemical and mechanical characteristics are observed in the introduction of 50 mass basalt with a particle size of 140 microns. Introduction of basalt in the amount of less than 30 mass does not achieve the desired properties: the material has a low impact strength, low oxygen index, high mass loss when ignited in the air. The increased concentration of basalt over 50 mass leads to the decrease of physical-mechanical properties. With the introduction of basalt with particle sizes 125-315 microns almost all physical-mechanical properties superior to the prototype property. The highest results are achieved when used in the compound of basalt with a particle size of 140 microns.
Table 1 presents the basic properties of the proposed filling compound and prototype.
The technical result of the invention is to reduce the number of steps of the curing compound from 3 to 2 and temperature curing with 140-160°C to 90 C, which is connected with the introduction into the composition of the filler - crushed basalt and plasticizer - trichloroethylphosphate, and reduced Flammability and weight loss when ignited in the air, increasing the impact strength as compared with the prototype.
Sources of information
1. Pat. 2039785 of the Russian Federation. Potting compound / Timberview, Tolkatchenko, Lonshakova etc. // www1.fips.ru.
2. Pat. 2343577 of the Russian Federation. Electric insulation of potting compound / Sniadeckich, Annaleena, Liyumba etc. // wwwl.fips.ru.
3. Pat. 2131895 of the Russian Federation. Modified epoxy compound insulating devices / Seeramesh, Lgeepa, Evelia etc. // wwwl.fips.ru.
Filling compound, including epoxy Dianov resin ED-20 in the amount of 100 mass and hardener, characterized in that it additionally contains a plasticizer - trichloroethylphosphate (TCHEPH) and a filler - crushed basalt with particle size 125-315 microns, and as a hardener contains polyethylenepolyamine PEPA in the following ratio of components, mass. PM: epoxy Dianov resin ED-20 - 100 polyethylenepolyamine PEPA - 10-15 trichloroethylphosphate TCHEPH - 20-30 crushed basalt - 40-60.