CN104592888A - High-moisture resistance wire enamel for dry-type electric transformers - Google Patents
High-moisture resistance wire enamel for dry-type electric transformers Download PDFInfo
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- CN104592888A CN104592888A CN201510062144.4A CN201510062144A CN104592888A CN 104592888 A CN104592888 A CN 104592888A CN 201510062144 A CN201510062144 A CN 201510062144A CN 104592888 A CN104592888 A CN 104592888A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D179/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen, with or without oxygen, or carbon only, not provided for in groups C09D161/00 - C09D177/00
- C09D179/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C09D179/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/20—Diluents or solvents
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/47—Levelling agents
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/308—Wires with resins
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Abstract
The invention provides a high-moisture resistance wire enamel for dry-type electric transformers. The high-moisture resistance wire enamel comprises the following components in parts by weight: 100-106 parts of dimethyl terephthalate, 45-50 parts of m-phenylenediamine, 51-54 parts of trimellitic anhydride, 18-20 parts of glycol, 25-30 parts of decabromodiphenyl ethane, 12-15 parts of mica powder, 36-40 parts of phenol, 73-78 parts of glycerol, 10-14 parts of a crosslinking agent, 4-5 parts of a flatting agent and 16-18 parts of a solvent. Compared with the polyesterimide wire enamel in the prior art, the high-moisture resistance wire enamel for dry-type electric transformers has the advantages of reducing the water absorption by 57%, providing remarkable hydrophobicity and moisture resistance, enhancing the mechanical and electrical properties of the prepared wire enamel, and improving the safety and reliability of the electric appliances such as transformers and the like using the high-moisture resistance wire enamel for dry-type electric transformers.
Description
Technical field
The present invention relates to wire enamel technology field, particularly relate to a kind of dry-type power transformer high moisture wire enamel.
Background technology
Along with the fast development of society, people are more and more stronger to the dependence of various electrical equipment and electrical in life, it is also proposed more and more higher requirement to the development of electrical equipment and electrical, and the performance raising wherein as the insulating material in electrical equipment and electrical also receives more concern.As the wire enamel of one of core component in electrical equipment and electrical insulating material, a kind of coating that can make to produce between wire and wire in machine winding good insulation layer, it is outer that it is mainly used in the bare copper wire of all kinds of wire diameter, alloy wire and ferry-glass covered wire, to improve and the performance of stable enameled wire.In various electrical equipment and electrical, to some very high requirement of performance of wire enamel, such as wire enamel will have higher physical strength, to have good consistency between impregnating varnish, can meet higher thermotolerance, shock-resistance and oil-proofness etc.Especially in high-power transformer, owing to being usually connected with stronger electric current in inner winding, and described environment is relatively more severe, has higher requirement to the performance of the wire enamel of coated wire.
In the prior art, disclose a kind of wire enamel in Chinese invention patent application 201210344239.1, wire enamel is made up of the raw material of following component: resol 10-12 part, No. 200 industrial naptha 40-50 parts, zinc oxide 2-4 part, tung oil 20-30 part, glycerine 2-4 part, carbon black 2-4 part.This wire enamel has good insulativity, oil-proofness, good sticking power is had to copper cash, but the wire enamel hydrophobic performance that this invention provides is poor, cause enameled wire mechanics and electric property to decline, and then reduction use the safety and reliability of the electric installations such as the transformer of this wire enamel.
Summary of the invention
Provide hereinafter about brief overview of the present invention, to provide about the basic comprehension in some of the present invention.Should be appreciated that this general introduction is not summarize about exhaustive of the present invention.It is not that intention determines key of the present invention or integral part, and nor is it intended to limit the scope of the present invention.Its object is only provide some concept in simplified form, in this, as the preorder in greater detail discussed after a while.
The object of the present invention is to provide a kind of dry-type power transformer high moisture wire enamel.
The invention provides a kind of dry-type power transformer high moisture wire enamel, comprise the component of following parts by weight:
Dimethyl terephthalate (DMT) 100-106 part, mphenylenediamine 45-50 part, trimellitic acid 1,2-anhydride 51-54 part, ethylene glycol 18-20 part, TDE 25-30 part, mica powder 12-15 part, phenol 36-40 part, glycerine 73-78 part, linking agent 10-14 part, flow agent 4-5 part, solvent 16-18 part.
Dry-type power transformer high moisture wire enamel provided by the invention, compared with polyesterimide wire enamel of the prior art, reduce the water-intake rate of 57%, there is significant hydrophobicity and moistureproofness, mechanics and the electric property of the enameled wire prepared get a promotion, and improve the safety and reliability using and the invention provides the electric installations such as the transformer of dry-type power transformer high moisture wire enamel.
Embodiment
Embodiment 1
The dry-type power transformer high moisture wire enamel provided in the present embodiment, comprise the component of following parts by weight: dimethyl terephthalate (DMT) 100 parts, mphenylenediamine 40 parts, trimellitic acid 1,2-anhydride 50 parts, ethylene glycol 15 parts, TDE 20 parts, mica powder 10 parts, phenol 30 parts, glycerine 70 parts, linking agent 8 parts, flow agent 4 parts, solvent 15 parts.
Wherein, linking agent is TriMethylolPropane(TMP), and flow agent is acrylic resin, and solvent is vinylbenzene.
Preparation technology is as follows for dry-type power transformer high moisture wire enamel:
Step a: each component of getting following parts by weight: dimethyl terephthalate (DMT) 100 parts, mphenylenediamine 40 parts, trimellitic acid 1,2-anhydride 50 parts, ethylene glycol 15 parts, phenol 30 parts, glycerine 70 parts, puts into reactor, is heated to 105 degrees Celsius, stirs 55 minutes, obtains mixing 1;
Step b: the linking agent 8 parts putting into parts by weight in mixture 1, TDE 20 parts, mica powder 10 parts, is heated to 145 degrees Celsius, stirs 30 minutes, obtains mixture 2;
Step c: the flow agent 4 parts adding following parts by weight to mixture 2, solvent 15 parts, stirs 30 minutes, to be cooled and get final product.
Embodiment 2
The dry-type power transformer high moisture wire enamel provided in the present embodiment, comprise the component of following parts by weight: dimethyl terephthalate (DMT) 103 parts, mphenylenediamine 45 parts, trimellitic acid 1,2-anhydride 52 parts, ethylene glycol 16 parts, TDE 24 parts, mica powder 12 parts, phenol 35 parts, glycerine 73 parts, linking agent 10 parts, flow agent 4.2 parts, solvent 16 parts.
Wherein, linking agent is m-xylene diamine, and flow agent is that PSI and trieline and ethylene glycol ether mix by weight for 1:1.
Preparation technology is as follows for dry-type power transformer high moisture wire enamel:
Step a: each component of getting following parts by weight: dimethyl terephthalate (DMT) 103 parts, mphenylenediamine 45 parts, trimellitic acid 1,2-anhydride 52 parts, ethylene glycol 16 parts, phenol 35 parts, glycerine 73 parts, puts into reactor, be heated to 105 degrees Celsius, stir 55 minutes, obtain mixture 3;
Step b: the linking agent 8 parts adding following parts by weight to mixture 3, TDE 24 parts, mica powder 12 parts, is heated to 145 degrees Celsius, stirs 30 minutes, obtains mixture 4;
Step c: the flow agent 4.2 parts adding following parts by weight to mixture 4, solvent 16 parts, stirs 30 minutes, to be cooled and get final product.
Embodiment 3
The dry-type power transformer high moisture wire enamel provided in the present embodiment, comprise the component of following parts by weight: dimethyl terephthalate (DMT) 105 parts, mphenylenediamine 48 parts, trimellitic acid 1,2-anhydride 53 parts, ethylene glycol 19 parts, TDE 28 parts, mica powder 14 parts, phenol 38 parts, glycerine 76 parts, linking agent 12 parts, flow agent 4.5 parts, solvent 18 parts.
Wherein, linking agent is that TriMethylolPropane(TMP), m-xylene diamine and tetra-n-butyl titanate mix by weight for 1.5:1:2.5, flow agent is that acrylic resin and polydimethylsiloxane mix by weight for 1:1, and solvent benzol ethene, trieline and ethylene glycol ether mix by weight for 1:2:1.
Preparation technology is as follows for dry-type power transformer high moisture wire enamel:
Step a: each component of getting following parts by weight: rutgers 105 parts, mphenylenediamine 48 parts, trimellitic acid 1,2-anhydride 53 parts, ethylene glycol 19 parts, phenol 38 parts, reactor put into by glycerine 76 parts, is heated to 105 degrees Celsius, stirs 55 minutes, obtains mixture 5;
Step b: the linking agent 12 parts putting into following parts by weight in mixture 5, TDE 28 parts, mica powder 14 parts, is heated to 145 degrees Celsius, stirs 30 minutes, obtains mixture 6;
Step c: the flow agent 4.5 parts adding following parts by weight to mixture 6, solvent 18 parts, stirs 30 minutes, to be cooled and get final product.
Embodiment 4
The dry-type power transformer high moisture wire enamel provided in the present embodiment, comprise the component of following parts by weight: dimethyl terephthalate (DMT) 108 parts, mphenylenediamine 49 parts, trimellitic acid 1,2-anhydride 54 parts, ethylene glycol 19 parts, TDE 29 parts, mica powder 15 parts, phenol 39 parts, glycerine 78 parts, linking agent 14 parts, flow agent 5 parts, solvent 18 parts.
Wherein, linking agent is tetra-n-butyl titanate, and flow agent is acrylic resin, and solvent is ethylene glycol ether.
Preparation technology is as follows for dry-type power transformer high moisture wire enamel:
Step a: each component of getting following parts by weight: dimethyl terephthalate (DMT) 100 parts, mphenylenediamine 49 parts, trimellitic acid 1,2-anhydride 50 parts, ethylene glycol 15 parts, phenol 30 parts, glycerine 70 parts, puts into reactor, be heated to 105 degrees Celsius, stir 55 minutes, obtain mixture 7;
Step b: the linking agent 8 parts adding following parts by weight to mixture 7, TDE 20 parts, mica powder 10 parts, is heated to 145 degrees Celsius, stirs 30 minutes, obtains mixture 8;
Step c: the flow agent 4 parts adding following parts by weight in mixture 8, solvent 15 parts, stirs 30 minutes, to be cooled and get final product.
Embodiment 5
The dry-type power transformer high moisture wire enamel provided in the present embodiment, comprise the component of following parts by weight: dimethyl terephthalate (DMT) 110 parts, mphenylenediamine 50 parts, trimellitic acid 1,2-anhydride 55 parts, ethylene glycol 20 parts, TDE 30 parts, mica powder 15 parts, phenol 40 parts, glycerine 80 parts, linking agent 15 parts, flow agent 8 parts, solvent 20 parts.
Wherein, linking agent is N hydroxymethyl acrylamide, and flow agent is PSI, and solvent is trieline.
Preparation technology is as follows for dry-type power transformer high moisture wire enamel:
Step a: each component of getting following parts by weight: dimethyl terephthalate (DMT) 110 parts, mphenylenediamine 50 parts, trimellitic acid 1,2-anhydride 55 parts, ethylene glycol 20 parts,, phenol 40 parts, glycerine 80 parts, puts into reactor, be heated to 105 degrees Celsius, stir 55 minutes, obtain mixture 9;
Step b: the linking agent 15 parts adding following parts by weight in mixture 9, TDE 30 parts, mica powder 15 parts, is heated to 145 degrees Celsius, stirs 30 minutes, obtains mixture 10;
Step c: the flow agent 8 parts adding following parts by weight in mixture 10, solvent 20 parts, stirs 30 minutes, to be cooled and get final product.
In order to measure the water-intake rate of the dry-type power transformer high moisture wire enamel in the present invention in embodiment 1-embodiment 5, contriver first adopts identical preparation technology to produce dry-type power transformer high moisture enameled wire coat in embodiment 1-embodiment 5, take following way to measure the water-intake rate of corresponding enameled wire coat again, concrete way is as follows:
Step 1: dry-type power transformer high moisture enameled wire coat is placed in the baking oven of 200 degrees Celsius, dry 2 hours;
Step 2: again the dry-type power transformer high moisture enameled wire coat of step 1 is placed on constant temperature (25 degrees Celsius) water-bath and soaks 2 hours;
Step 3: the surface water mark of the dry-type power transformer high moisture enameled wire coat in step 2 is wiped, weighs;
Step 4: repeating step 1-step 3, amounts to 3 times, calculates the mean value of three times
After above-mentioned test way, contriver obtains as the data in table 1, simultaneously in order to the performance of dry-type power transformer high moisture wire enamel provided by the invention is described better, contriver has also measured the respective performances of polyesterimide wire enamel conventional in this area.
As shown in Table 1, the water-intake rate of the high moisture enameled wire coat water-intake rate far below polyesterimide wire enamel film conventional in this area of the dry-type power transformer in embodiment 1-embodiment 5.Dry-type power transformer in embodiment 3 with the water-intake rate of high moisture enameled wire coat also far below the water-intake rate of the high moisture of the dry-type power transformer in other embodiments enameled wire coat, reduce 57% than the water-intake rate of polyesterimide wire enamel film conventional in this area simultaneously, significantly increase humidity resistance, further increase enameled wire mechanics and electric property, finally improve the safety and reliability of the electric installations such as the transformer using this wire enamel, tool has an unexpected effect.
Table 1
Analyze the reason that dry-type power transformer high moisture wire enamel provided by the invention has low water absorption, especially embodiment 3 comprises following component: dimethyl terephthalate (DMT) 105 parts, trimellitic acid 1,2-anhydride 53 parts, ethylene glycol 19 parts, TDE 28 parts, mica powder 14 parts, phenol 38 parts, glycerine 76 parts, linking agent 12 parts, flow agent 4.5 parts, the water-intake rate of the dry-type power transformer high moisture wire enamel of solvent 18 parts is minimum, and namely moistureproofness is best.Wherein, linking agent is that TriMethylolPropane(TMP), m-xylene diamine and tetra-n-butyl titanate mix by weight for 1.5:1:2.5, flow agent is that acrylic resin and polydimethylsiloxane mix by weight for 1:1, and solvent benzol ethene, trieline and ethylene glycol ether mix for 1:2:1 by weight.Contriver thinks the compositional selecting in this and the present embodiment, and comprise bed material, linking agent, flow agent, the selection of solvent all has singularity.
Contriver thinks, owing to having ehter bond and sec.-propyl in the molecular structure, add macromole chain flexibility and free body, linking agent adopts TriMethylolPropane(TMP), m-xylene diamine and tetra-n-butyl titanate to mix by weight for 1.5:1:2.5 simultaneously, greatly strengthen intermolecular crosslinked action, and there is crosslinked action when solidifying in hydrophilic radical, make the surface energy of surface energy far below water of dry-type power transformer high moisture enameled wire coat, thus there is good hydrophobicity and moistureproofness.Contriver also finds simultaneously, if only adopt combination that is a kind of in TriMethylolPropane(TMP), m-xylene diamine, N hydroxymethyl acrylamide, tetra-n-butyl titanate or other ratios, all cannot realize the special performance boost of the present embodiment, visible only under this specific components mode and part by weight relation, beyond thought synergy can be produced in dry-type power transformer high moisture wire enamel provided by the invention, realize beyond thought effect.
Simultaneously, flow agent is that acrylic resin and polydimethylsiloxane mix by weight for 1:1, solvent benzol ethene, trieline and ethylene glycol ether are by weight when mixing for 1:2:1, coordinate together with other raw materials with linking agent, finally prepare the dry-type power transformer high moisture wire enamel that hydrophobic performance is splendid.
Visible, in the present invention, the selection of component and content is all non-obvious, and the selection of these components and content, acts synergistically mutually just, the final dry-type power transformer high moisture wire enamel prepared that just can make has excellent performance, meets the demand of practice; Therefore, technical scheme of the present invention is non-obvious.
Meanwhile, those skilled in the art know, and in the present invention, linking agent is TriMethylolPropane(TMP), m-xylene diamine, N hydroxymethyl acrylamide, tetra-n-butyl titanate; But in prior art, remaining linking agent can also be suitable for the solution of the present invention, within protection scope of the present invention.
Meanwhile, those skilled in the art know, and in the present invention, flow agent is acrylic resin, polydimethylsiloxane and PSI; But in prior art, remaining flow agent can also be suitable for the solution of the present invention, within protection scope of the present invention.
Meanwhile, those skilled in the art know, and in the present invention, solvent is vinylbenzene, trieline, ethylene glycol ether; But in prior art, remaining solvent can also be suitable for the solution of the present invention, within protection scope of the present invention.
Last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (7)
1. a dry-type power transformer high moisture wire enamel, is characterized in that, comprises the component of following parts by weight:
Dimethyl terephthalate (DMT) 100-106 part, mphenylenediamine 45-50 part, trimellitic acid 1,2-anhydride 51-54 part, ethylene glycol 18-20 part, TDE 25-30 part, mica powder 12-15 part, phenol 36-40 part, glycerine 73-78 part, linking agent 10-14 part, flow agent 4-5 part, solvent 16-18 part.
2. dry-type power transformer high moisture wire enamel according to claim 1, is characterized in that, described linking agent is that in TriMethylolPropane(TMP), m-xylene diamine, N hydroxymethyl acrylamide, tetra-n-butyl titanate, one or several mix.
3. dry-type power transformer high moisture wire enamel according to claim 2, is characterized in that, described linking agent is that TriMethylolPropane(TMP), m-xylene diamine and tetra-n-butyl titanate mix by weight for 1.5:1:2.5.
4. dry-type power transformer high moisture wire enamel according to claim 1, is characterized in that, described flow agent is acrylic resin, one or several mixing in polydimethylsiloxane and PSI.
5. dry-type power transformer high moisture wire enamel according to claim 4, is characterized in that, described flow agent is that acrylic resin and polydimethylsiloxane mix by weight for 1:1.
6. dry-type power transformer high moisture wire enamel according to claim 1, is characterized in that, described solvent is one or several mixing in vinylbenzene, trieline, ethylene glycol ether.
7. dry-type power transformer high moisture wire enamel according to claim 6, is characterized in that, described solvent is vinylbenzene, trieline and ethylene glycol ether mix by weight for 1:2:1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510062144.4A CN104592888B (en) | 2015-02-05 | 2015-02-05 | High-moisture resistance wire enamel for dry-type electric transformers |
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| CN201510062144.4A CN104592888B (en) | 2015-02-05 | 2015-02-05 | High-moisture resistance wire enamel for dry-type electric transformers |
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| CN104592888B CN104592888B (en) | 2017-01-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110564288A (en) * | 2019-09-05 | 2019-12-13 | 合肥盛宝电气有限公司 | Modified wire enamel for transformer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3425866A (en) * | 1965-05-20 | 1969-02-04 | Schenectady Chemical | Electrical conductor coated with polyesterpolyimide inner layer and polyester outer layer |
| CN1488697A (en) * | 2002-10-09 | 2004-04-14 | 上海汉邦化工有限公司 | Corona resistant enamel-covered wire paint for variable frequency motor and preparing process thereof |
| CN101343435A (en) * | 2007-07-10 | 2009-01-14 | 上海电缆研究所 | Fire resistant insulating varnish and fire resistant non-magnetism varnished wire, and preparation thereof |
| CN103745774A (en) * | 2013-11-21 | 2014-04-23 | 昆山市奋发绝缘材料有限公司 | Insulation enameled wire |
-
2015
- 2015-02-05 CN CN201510062144.4A patent/CN104592888B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3425866A (en) * | 1965-05-20 | 1969-02-04 | Schenectady Chemical | Electrical conductor coated with polyesterpolyimide inner layer and polyester outer layer |
| CN1488697A (en) * | 2002-10-09 | 2004-04-14 | 上海汉邦化工有限公司 | Corona resistant enamel-covered wire paint for variable frequency motor and preparing process thereof |
| CN101343435A (en) * | 2007-07-10 | 2009-01-14 | 上海电缆研究所 | Fire resistant insulating varnish and fire resistant non-magnetism varnished wire, and preparation thereof |
| CN103745774A (en) * | 2013-11-21 | 2014-04-23 | 昆山市奋发绝缘材料有限公司 | Insulation enameled wire |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110564288A (en) * | 2019-09-05 | 2019-12-13 | 合肥盛宝电气有限公司 | Modified wire enamel for transformer |
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