CN108973282B - High-thermal-conductivity polyimide glass powder mica tape for railway traction motor coil - Google Patents

High-thermal-conductivity polyimide glass powder mica tape for railway traction motor coil Download PDF

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CN108973282B
CN108973282B CN201810760090.2A CN201810760090A CN108973282B CN 108973282 B CN108973282 B CN 108973282B CN 201810760090 A CN201810760090 A CN 201810760090A CN 108973282 B CN108973282 B CN 108973282B
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traction motor
parts
railway traction
motor coil
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CN108973282A (en
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袁健
吕佩
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Danyang Wodle Electrical Materials Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • B32B27/281—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polyimides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/10—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/06—Layered products comprising a layer of paper or cardboard specially treated, e.g. surfaced, parchmentised
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
    • H01B3/04—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances mica
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/206—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties

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  • Organic Insulating Materials (AREA)
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Abstract

The invention relates to a high-heat-conductivity polyimide glass powder mica tape for a railway traction motor coil, and belongs to the technical field of motor coil insulation materials. The high-heat-conductivity polyimide glass powder mica tape for the railway traction motor coil comprises a mica paper layer, a polyimide film layer and an electrical alkali-free glass cloth layer; the mica paper layer and the electrical alkali-free cloth layer are respectively coated with an organic silicon adhesive and then laminated on two sides of the corona-resistant polyimide film. The mica tape is wrapped on the railway traction motor coil for vacuum pressure impregnation, the adhesion between the mica tape and the coil is firmer, and the integral insulating property is more excellent, so that the medium loss of the coil in normal and high temperature states is reduced, and the quality stability and reliability of the railway traction motor are ensured.

Description

High-thermal-conductivity polyimide glass powder mica tape for railway traction motor coil
Technical Field
The invention relates to the technical field of motor coil insulating materials, in particular to a high-heat-conductivity polyimide glass powder mica tape for a railway traction motor coil.
Background
The size of the working space of a railway traction motor is limited by the gauge and sheave diameter, and is subject to considerable shock vibrations as the locomotive travels through rail gaps and switches. When the meshing of the large and small gears is deviated, torsional vibration is generated on the armature, and rain, snow, dust and sand and the like easily enter the rail vehicle if the rail vehicle is operated in a severe environment. Therefore, the traction motor has many requirements in design and structure, such as to make full use of the internal space of the machine body to make the structure compact, and to adopt good insulating materials. With the continuous development and progress of high-speed railways and rail transit technologies, the development trend of high-power, small and light railway traction motors is realized, and the insulation performance and the operation reliability of the railway traction motors are key technologies adapted to the development trend. In the prior art, the mica tape structure usually uses mica paper as a base material, and glass fiber cloth and a polyimide film are compounded on two surfaces of the mica paper respectively, so that the mechanical property and the electrical insulating property of the insulation structure are still required to be further improved in the use process, and the insulation structure is difficult to adapt to the development trend of high power and small volume of a railway traction motor.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention aims to provide a high-thermal-conductivity polyimide glass powder mica tape for a railway traction motor coil.
In order to achieve the purpose, the invention adopts the following technical scheme:
a high heat conduction polyimide glass powder mica tape for a railway traction motor coil comprises a mica paper layer, a polyimide film layer and an electrical alkali-free glass cloth layer; the method is characterized in that: coating an organic silicon adhesive on the mica paper layer and the electrical alkali-free glass cloth layer respectively and then laminating the mica paper layer and the electrical alkali-free glass cloth layer on two sides of the polyimide film layer; the mica paper layer is subjected to immersion treatment by using a treatment liquid containing phosphate and a triazine thiol compound, and the treatment liquid consists of 20-30 g/L of phosphate, 12-18 g/L of the triazine thiol compound and the balance of an organic solvent.
Wherein the phosphate is selected from lauryl phosphate monoester or dilauryl phosphate. The triazine thiol compound is selected from 1,3, 5-triazine-2, 4, 6-trithiol triethanolamine or 6-anilino-1, 3, 5-triazine-2, 4-dithiol.
The organic silicon adhesive is composed of hydroxyl-terminated polysiloxane shown in a formula (I), a metal organic tin compound, alkoxy silane shown in a formula (II), HTC particles, a catalyst and an organic solvent;
formula (I)
Figure GDA0002401845610000021
Wherein R is1Represents a hydrocarbon group having 1 to 10 carbon atoms, and n is an integer of 50 to 1000. Said hydrocarbon group may be, for example, methyl, ethyl, propyl, butyl, pentyl, hexylPhenyl, benzyl, and the like.
Wherein the metallic organotin compound is at least one selected from the group consisting of tetraisopropoxytin, tetra-n-propoxytin, tetra-n-butoxytin, tin tetraacetylacetonate, tin tetraethylacetoacetate, tin tetrapropylacetoacetate, tin tetrabutylacetoacetate, tin dibutyldilaurate, tin dibutyldioctoate and tin dioctyldilaurate.
Formula (II)
Figure GDA0002401845610000022
Wherein R is2Represents a substitutable hydrocarbon group having 1 to 20 carbons, R3Represents an alkyl group having 1 to 5 carbon atoms, and m represents an integer of 1 to 3;
the HTC particles are selected from at least one of aluminum oxide, magnesium oxide, zinc oxide, aluminum nitride or boron nitride, and the particle size of the HTC particles is 5-200 nm.
The organic silicon adhesive comprises, by weight, 100 parts of hydroxyl-terminated polysiloxane, 3.0-20.0 parts of metal organic tin compound, 3.0-10.0 parts of alkoxy silane, 1.0-10.0 parts of HTC particles, 0.3-3.0 parts of catalyst and 3.0-15.0 parts of organic solvent.
Compared with the prior art, the high-heat-conductivity polyimide glass powder mica tape for the railway traction motor coil has the following beneficial effects:
after the mica tape is wrapped on the coil of the railway traction motor and Vacuum Pressure Impregnation (VPI) is carried out, the mica tape is bonded with the coil more firmly, and the integral insulating property and mechanical property are more excellent, so that the medium loss of the coil in normal and high-temperature states is reduced, and the quality stability and reliability of the railway traction motor are ensured.
Drawings
FIG. 1 is a schematic cross-sectional structure view of a high thermal conductivity polyimide glass powder mica tape for a railway traction motor coil of the present invention.
Detailed Description
The high thermal conductivity polyimide glass powder mica tape for railway traction motor coils of the present invention will be further described with reference to specific embodiments, so as to help those skilled in the art to more completely, accurately and deeply understand the inventive concept and technical scheme of the present invention.
As shown in fig. 1, the high thermal conductivity polyimide glass powder mica tape for the railway traction motor coil of the present invention comprises a mica paper layer 20, a polyimide film layer 10 and an electrical alkali-free glass cloth layer 30. The mica paper layer 20 and the electrical alkali-free glass cloth layer 30 are respectively bonded to two sides of the polyimide film layer 10 by the organic silicon adhesive 50. The high-thermal-conductivity polyimide glass powder mica tape can be prepared by the following method: respectively coating the organic silicon adhesive on one surface of an electric alkali-free glass cloth layer and one surface of a mica paper layer, laminating the organic silicon adhesive and a polyimide film together through a composite roller to form a layered structure with the polyimide film layer as an intermediate layer, the mica paper layer as a bottom layer and the electric alkali-free glass cloth layer as a surface layer, curing at 120-150 ℃, and shearing to obtain the mica tape. In the invention, the mica paper layer is non-calcined white mica paper, and the basis weight is 70-160 g/m2The polyimide film layer is a corona-resistant polyimide film with the quantitative rate of 30-50 g/m2The electrical alkali-free glass cloth layer has a quantitative rate of 15-30 g/m2。
Furthermore, the silicone adhesive in the invention can adopt a commercially available high-temperature resistant silicone adhesive, and can also be the silicone adhesive which is composed of the hydroxyl-terminated polysiloxane shown in the formula (I), the metal organotin compound, the alkoxysilane shown in the formula (II), the HTC particles, the catalyst and the organic solvent.
Formula (I)
Figure GDA0002401845610000031
Wherein R is1Represents a hydrocarbon group having 1 to 10 carbon atoms, and n is an integer of 50 to 1000. The hydrocarbon group may be exemplified by methyl, ethyl, propyl, butyl, pentyl, hexyl, phenyl, methyl, ethyl, propyl, butyl, pentyl, hexyl, phenyl, or the like,Benzyl, and the like. Specific examples of the hydroxyl-terminated polysiloxane include hydroxyl-terminated polydimethylsiloxane, hydroxyl-terminated polymethylphenylsiloxane, and hydroxyl-terminated polydiphenylsiloxane.
Wherein the metallic organotin compound is at least one selected from the group consisting of tetraisopropoxytin, tetra-n-propoxytin, tetra-n-butoxytin, tin tetraacetylacetonate, tin tetraethylacetoacetate, tin tetrapropylacetoacetate, tin tetrabutylacetoacetate, tin dibutyldilaurate, tin dibutyldioctoate and tin dioctyldilaurate.
Formula (II)
Figure GDA0002401845610000032
Wherein R is2Represents a substitutable hydrocarbon group having 1 to 20 carbons, R3Represents an alkyl group having 1 to 5 carbon atoms, and m represents an integer of 1 to 3. Preferably, the alkoxysilane may be selected from, for example, 3-glycidoxypropylmethyldimethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, 3-glycidoxypropyltriethoxysilane, 3-mercaptopropyltriethoxysilane, mercaptomethyltrimethoxysilane, 3-isocyanatopropyltriethoxysilane, 3-mercaptopropyltrimethoxysilane, 3-aminopropylmethyldiethoxysilane, 3-aminopropyldimethylethoxysilane, gamma-ureidopropyltriethoxysilane, gamma-ureidopropyltrimethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-methacryloxypropyltriethoxysilane, 3-glycidoxypropyltrimethoxysilane, and mixtures thereof, At least one of 3-acryloxypropyltrimethoxysilane or 3-acryloxypropyltriethoxysilane. Preferably, the alkoxysilane is at least one selected from the group consisting of 3-mercaptopropyltriethoxysilane, mercaptomethyltrimethoxysilane, 3-isocyanatopropyltriethoxysilane, and 3-mercaptopropyltrimethoxysilane.
The organic silicon adhesive comprises, by weight, 100 parts of hydroxyl-terminated polysiloxane, 3.0-20.0 parts of metal organic tin compound, 3.0-10.0 parts of alkoxy silane, 1.0-10.0 parts of HTC particles, 0.3-3.0 parts of catalyst and 3.0-15.0 parts of organic solvent.
Wherein the HTC particles are selected from at least one of aluminum oxide, magnesium oxide, zinc oxide, aluminum nitride or boron nitride, and the particle size of the HTC particles is 5-200 nm.
Wherein the catalyst is selected from one of ethanolamine, triethylamine, hydrochloric acid, nitric acid, hydrochloride or nitrate.
Wherein the organic solvent is selected from ethanol, n-propanol, isopropanol, n-butanol, acetone, ethyl acetate or tetrahydrofuran, diethylene glycol monobutyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol dibutyl ether, etc.
In addition, the mica paper is subjected to the impregnation treatment of the treatment liquid containing the phosphate ester and the triazine thiol compound in the invention, so that the normal dielectric loss can be further reduced. The phosphate is selected from lauryl phosphate monoester or dilauryl phosphate. The triazine thiol compound is selected from 1,3, 5-triazine-2, 4, 6-trithiol triethanolamine or 6-anilino-1, 3, 5-triazine-2, 4-dithiol.
The mica tape is continuously and tightly wrapped around a copper conductor of a railway traction motor coil, one side of a mica paper layer is closer to the wrapped copper conductor of a rotor coil to form an insulating laminated structure, then the insulating laminated structure is filled into an impregnation tank, an epoxy anhydride resin mixture (containing bisphenol A epoxy resin and methylhexahydrophthalic anhydride) is used for vacuum impregnation treatment, and then the impregnating tank is placed into a furnace for thermosetting, so that the insulated railway traction motor coil is prepared.
Example 1
Preparation of 70g/m2Non-calcined type white mica paper, 38g/m2And a corona resistant polyimide film of 20g/m2The electrical alkali-free glass cloth. The non-calcined white mica paper and the electrical alkali-free cloth are respectively coated with the heat-resistant organic silicon adhesive, and then are laminated on two sides of the corona-resistant polyimide film through the composite roller, and then are cured at 130 ℃ to obtain the mica tape of the embodiment. The mica tape of the present embodiment is continuously and tightly wrapped in a half-lap mannerThe number of the wrapping layers around the copper conductor of the railway traction motor coil is 3, one side of the non-calcined type white mica paper is closer to the wrapped copper conductor of the rotor coil to form an insulating laminated structure, then the insulating laminated structure is filled into an impregnation tank, epoxy anhydride resin mixture (containing bisphenol A epoxy resin and methylhexahydrophthalic anhydride) is used for vacuum impregnation treatment, and then the insulating laminated structure is placed into a furnace for thermosetting, so that the insulated railway traction motor coil is prepared.
Example 2
Prepare 120g/m2Non-calcined type white mica paper, 38g/m2And a corona resistant polyimide film of 18g/m2The electrical alkali-free glass cloth. The non-calcined white mica paper and the electrical alkali-free cloth are respectively coated with the heat-resistant organic silicon adhesive, and then are laminated on two sides of the corona-resistant polyimide film through the composite roller, and then are cured at 130 ℃ to obtain the mica tape of the embodiment. The mica tape of the embodiment is continuously and tightly wrapped around a copper conductor of a railway traction motor coil in a half-lap mode, the number of wrapping layers is 3, one side of non-calcined type white mica paper is closer to the wrapped copper conductor of the rotor coil to form an insulating laminated structure, then the insulating laminated structure is filled into an impregnation tank, epoxy anhydride resin mixture (containing bisphenol A epoxy resin and methylhexahydrophthalic anhydride) is used for vacuum impregnation treatment, and then the impregnating tank is placed into a furnace for thermosetting, so that the insulated railway traction motor coil is prepared.
Example 3
Preparation of 150g/m2Non-calcined type white mica paper, 44g/m2And a corona resistant polyimide film of 26g/m2The electrical alkali-free glass cloth. The non-calcined white mica paper and the electrical alkali-free cloth are respectively coated with the heat-resistant organic silicon adhesive, and then are laminated on two sides of the corona-resistant polyimide film through the composite roller, and then are cured at 130 ℃ to obtain the mica tape of the embodiment. The mica tape of the embodiment is continuously and tightly wrapped around the copper conductor of the railway traction motor coil in a half-lap mode, the wrapping number is 3, one side of non-calcined white mica paper is closer to the wrapped copper conductor of the rotor coil to form an insulating laminated structure, then the insulating laminated structure is filled into an impregnating tank, and epoxy anhydride resin mixture (wrapping resin) is used for coatingContaining bisphenol a type epoxy resin and methylhexahydrophthalic anhydride) is subjected to vacuum impregnation treatment, and then is put into a furnace for thermosetting to prepare the insulated railway traction motor coil.
Comparative example 1
Preparation of 70g/m2Non-calcined type white mica paper, 38g/m2And a corona resistant polyimide film of 20g/m2The electrical alkali-free glass cloth. And respectively coating the corona-resistant polyimide film and the electrical alkali-free cloth with a heat-resistant organic silicon adhesive, laminating the heat-resistant organic silicon adhesive on two sides of the non-calcined white mica paper through a composite roller, and curing at 130 ℃ to obtain the mica tape of the comparative example. The mica tape of the comparative example was continuously and tightly half-wrapped around a copper conductor of a railway traction motor coil, the number of wrapping layers was 3, and one side of a corona-resistant polyimide film layer was brought closer to the wrapped copper conductor of a rotor coil to form an insulating laminated structure, which was then filled in an impregnation tank, vacuum-impregnated with an epoxy anhydride resin mixture (containing bisphenol a type epoxy resin and methylhexahydrophthalic anhydride), and then placed in a furnace for thermosetting to prepare an insulated railway traction motor coil.
Comparative example 2
Prepare 120g/m2Non-calcined type white mica paper, 38g/m2And a corona resistant polyimide film of 18g/m2The electrical alkali-free glass cloth. And respectively coating the corona-resistant polyimide film and the electrical alkali-free cloth with a heat-resistant organic silicon adhesive, laminating the heat-resistant organic silicon adhesive on two sides of the non-calcined white mica paper through a composite roller, and curing at 130 ℃ to obtain the mica tape of the comparative example. The mica tape of the comparative example was continuously and tightly half-wrapped around a copper conductor of a railway traction motor coil, the number of wrapping layers was 3, and one side of a corona-resistant polyimide film layer was brought closer to the wrapped copper conductor of a rotor coil to form an insulating laminated structure, which was then filled in an impregnation tank, vacuum-impregnated with an epoxy anhydride resin mixture (containing bisphenol a type epoxy resin and methylhexahydrophthalic anhydride), and then placed in a furnace for thermosetting to prepare an insulated railway traction motor coil.
Comparative example 3
Preparation of 150g/m2Non-calcined type white mica paper, 44g/m2And a corona resistant polyimide film of 26g/m2The electrical alkali-free glass cloth. And respectively coating the corona-resistant polyimide film and the electrical alkali-free cloth with a heat-resistant organic silicon adhesive, laminating the heat-resistant organic silicon adhesive on two sides of the non-calcined white mica paper through a composite roller, and curing at 130 ℃ to obtain the mica tape of the comparative example. The mica tape of the comparative example was continuously and tightly half-wrapped around a copper conductor of a railway traction motor coil, the number of wrapping layers was 3, and one side of a corona-resistant polyimide film layer was brought closer to the wrapped copper conductor of a rotor coil to form an insulating laminated structure, which was then filled in an impregnation tank, vacuum-impregnated with an epoxy anhydride resin mixture (containing bisphenol a type epoxy resin and methylhexahydrophthalic anhydride), and then placed in a furnace for thermosetting to prepare an insulated railway traction motor coil.
The mica tapes obtained in examples 1 to 3 and comparative examples 1 to 3 have good bending strength and no discrete mica particles can be observed by naked eyes when the insulated coils obtained in examples 1 to 3 and comparative examples 1 to 3 are cut and observed. The insulated railway traction motor coils were also tested for room temperature tg δ versus applied voltage and electrical strength, with the results shown in table 1.
TABLE 1
Figure GDA0002401845610000061
Example 4
The difference between this example and example 1 is that the non-calcined muscovite paper was impregnated with a treatment solution containing 20g/L of lauryl phosphate monoester, 12g/L of 1,3, 5-triazine-2, 4, 6-trithiol triethanolamine, and the balance of diethylene glycol dibutyl ether as a solvent. Immersion treatment was carried out for 20 minutes, followed by curing at 120 ℃ for 5 minutes.
Example 5
The difference between this example and example 2 is that the non-calcined muscovite paper was impregnated with a treatment solution containing 30g/L of lauryl phosphate monoester, 18g/L of 6-anilino-1, 3, 5-triazine-2, 4-dithiol, and the balance of diethylene glycol dibutyl ether as a solvent. Immersion treatment was carried out for 20 minutes, followed by curing at 120 ℃ for 5 minutes.
Example 6
The difference between this example and example 3 is that the non-calcined muscovite paper was impregnated with a treatment solution containing 30g/L of dilauryl phosphate, 18g/L of 6-anilino-1, 3, 5-triazine-2, 4-dithiol, and the balance of diethylene glycol dibutyl ether as a solvent. Immersion treatment was carried out for 20 minutes, followed by curing at 120 ℃ for 5 minutes.
The insulated railway traction motor coils were then tested for room temperature tg δ versus applied voltage and electrical strength, with the results shown in table 2.
TABLE 2
Figure GDA0002401845610000071
Example 7
The difference from example 1 is that the following silicone adhesive was used. Specifically, 100 parts by weight of hydroxyl-terminated polydimethylsiloxane (average molecular weight of 12000), 12.0 parts by weight of tetraisopropoxytin, 5.0 parts by weight of 3-glycidoxypropyltrimethoxysilane, and 8.0 parts by weight of diethylene glycol dibutyl ether were mixed with stirring, 0.3 part by weight of zinc nitrate was added, the mixture was stirred for 30 minutes, 5.0 parts by weight of nano boron nitride particles were added, the stirring was continued for 1 hour, and the mixture was allowed to stand for 24 hours, thereby obtaining the silicone adhesive used in the present example.
Example 8
The difference from example 1 is that the following silicone adhesive was used. Specifically, 100 parts by weight of hydroxyl-terminated polydimethylsiloxane (average molecular weight of 11500), 12.0 parts by weight of tin tetraacetylacetonate, 8.0 parts by weight of 3-isocyanatopropyltriethoxysilane, and 10.0 parts by weight of diethylene glycol dibutyl ether were stirred and mixed, then 0.5 part by weight of zinc nitrate was added, then stirring was performed for 30 minutes, then 5.0 parts by weight of nano boron nitride particles were added, stirring was continued for 1 hour, and then standing was performed for 24 hours, thereby obtaining the silicone adhesive used in the present example.
Example 9
The difference from example 3 is that the following silicone adhesive was used. Specifically, 100 parts by weight of hydroxyl-terminated polymethylphenylsiloxane (average molecular weight of 12000), 12.0 parts by weight of tetraisopropoxytin, 5.0 parts by weight of 3-glycidoxypropyltriethoxysilane, and 8.0 parts by weight of diethylene glycol monobutyl ether were mixed with stirring, 0.5 part by weight of zinc nitrate was added, the mixture was stirred for 30 minutes, 5.0 parts by weight of nano aluminum nitride particles were added, the mixture was further stirred for 1 hour, and the mixture was allowed to stand for 24 hours, thereby obtaining the silicone adhesive used in the present example.
Example 10
The difference from example 3 is that the following silicone adhesive was used. Specifically, 100 parts by weight of hydroxyl-terminated polymethylphenylsiloxane (average molecular weight of 11500), 12.0 parts by weight of tin tetraacetylacetonate, 5.0 parts by weight of 3-isocyanatopropyltriethoxysilane, and 10.0 parts by weight of diethylene glycol monobutyl ether were stirred and mixed, then 0.5 part by weight of zinc nitrate was added, followed by stirring for 30 minutes, then 5.0 parts by weight of nano aluminum nitride particles were added, the stirring was continued for 1 hour, and then the mixture was allowed to stand for 24 hours, thereby obtaining the silicone adhesive used in the present example.
Comparative example 4
The difference from example 1 is that the following silicone adhesive was used. Specifically, 100 parts by weight of hydroxyl-terminated polydimethylsiloxane (average molecular weight of 12000), 5.0 parts by weight of 3-glycidoxypropyltrimethoxysilane, and 8.0 parts by weight of diethylene glycol dibutyl ether were mixed with stirring, 0.3 part by weight of zinc nitrate was added, stirring was continued for 30 minutes, 5.0 parts by weight of nano boron nitride particles were added, stirring was continued for 1 hour, and then, standing was continued for 24 hours, to obtain the silicone adhesive used in this comparative example.
Comparative example 5
The difference from example 3 is that the following silicone adhesive was used. Specifically, 100 parts by weight of hydroxyl-terminated polymethylphenylsiloxane (average molecular weight of 12000), 12.0 parts by weight of 3-glycidoxypropyltriethoxysilane, and 8.0 parts by weight of diethylene glycol monobutyl ether were stirred and mixed, then 0.5 part by weight of zinc nitrate was added, followed by stirring for 30 minutes, then 5.0 parts by weight of nano aluminum nitride particles were added, and the stirring was continued for 1 hour, and then the mixture was allowed to stand for 24 hours, to obtain the silicone adhesive used in this comparative example.
Comparative example 6
The difference from example 1 is that the following silicone adhesive was used. Specifically, 100 parts by weight of hydroxyl-terminated polydimethylsiloxane (average molecular weight of 11500), 10.0 parts by weight of tetraisopropoxytitanium, 8.0 parts by weight of 3-isocyanatopropyltriethoxysilane, and 10.0 parts by weight of diethylene glycol dibutyl ether were mixed with stirring, 0.5 part by weight of zinc nitrate was added, followed by stirring for 1 hour, and then allowed to stand for 24 hours, to obtain the silicone adhesive used in this comparative example.
Comparative example 7
The difference from example 3 is that the following silicone adhesive was used. Specifically, 100 parts by weight of hydroxyl-terminated polymethylphenylsiloxane (average molecular weight of 11500), 12.0 parts by weight of tetraisopropoxytitanium, 5.0 parts by weight of 3-isocyanatopropyltriethoxysilane, and 10.0 parts by weight of diethylene glycol monobutyl ether were mixed with stirring, 0.5 part by weight of zinc nitrate was added, stirring was continued for 30 minutes, 5.0 parts by weight of nano aluminum nitride particles were added, stirring was continued for 1 hour, and then standing was continued for 24 hours, to obtain the silicone adhesive used in this comparative example.
The insulated railway traction motor coils tg δ of examples 7-10 and comparative examples 4-7 were tested for temperature and the results are shown in table 3.
TABLE 3
Figure GDA0002401845610000091
It is obvious to those skilled in the art that the present invention is not limited to the above embodiments, and it is within the scope of the present invention to adopt various insubstantial modifications of the method concept and technical scheme of the present invention, or to directly apply the concept and technical scheme of the present invention to other occasions without modification.

Claims (4)

1. A high heat conduction polyimide glass powder mica tape for a railway traction motor coil comprises a mica paper layer, a polyimide film layer and an electrical alkali-free glass cloth layer; the method is characterized in that: the mica paper layer and the electrical alkali-free glass cloth layer are respectively coated with an organic silicon adhesive and then laminated on two sides of the polyimide film layer; the mica paper layer is subjected to immersion treatment by using a treatment liquid containing phosphate and a triazine thiol compound, and the treatment liquid consists of 20-30 g/L of phosphate, 12-18 g/L of the triazine thiol compound and the balance of an organic solvent.
2. The high thermal conductivity polyimide glass powder mica tape for the railway traction motor coil as claimed in claim 1, wherein: the organic silicon adhesive comprises, by weight, 100 parts of hydroxyl-terminated polysiloxane, 3.0-20.0 parts of metal organic tin compound, 3.0-10.0 parts of alkoxy silane, 1.0-10.0 parts of HTC particles, 0.3-3.0 parts of catalyst and 3.0-15.0 parts of organic solvent;
wherein the polysiloxane is hydroxyl-terminated polysiloxane shown as a formula (I), and the alkoxy silane is alkoxy silane shown as a formula (II)
Formula (I)
Figure FDA0002401845600000011
Wherein R is1Represents a hydrocarbon group having 1 to 10 carbon atoms, and n is an integer of 50 to 1000;
formula (II)
Figure FDA0002401845600000012
Wherein R is2Represents a hydrocarbonA group or a substituted hydrocarbon group having 1 to 20 carbons, R3Represents an alkyl group having 1 to 5 carbon atoms, and m represents an integer of 1 to 3;
the HTC particles are selected from at least one of aluminum oxide, magnesium oxide, zinc oxide, aluminum nitride or boron nitride, and the particle size of the HTC particles is 5-200 nm;
the alkoxysilane is at least one selected from the group consisting of 3-glycidoxypropylmethyldimethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, 3-glycidoxypropyltriethoxysilane, 3-mercaptopropyltriethoxysilane, mercaptomethyltrimethoxysilane, 3-isocyanatopropyltriethoxysilane, 3-mercaptopropyltrimethoxysilane, 3-aminopropylmethyldiethoxysilane, 3-aminopropyldimethylethoxysilane, gamma-ureidopropyltriethoxysilane, gamma-ureidopropyltrimethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-methacryloxypropyltriethoxysilane, 3-acryloxypropyltrimethoxysilane and 3-acryloxypropyltriethoxysilane .
3. The high-thermal-conductivity polyimide glass powder mica tape for the railway traction motor coil as claimed in claim 2, wherein: the hydroxyl-terminated polysiloxane is selected from hydroxyl-terminated polydimethylsiloxane, hydroxyl-terminated polymethylphenylsiloxane or hydroxyl-terminated polydiphenylsiloxane.
4. The high-thermal-conductivity polyimide glass powder mica tape for the railway traction motor coil as claimed in claim 2, wherein: the metal organic tin compound is at least one of tin tetraisopropoxide, tin tetra-n-propoxide, tin tetra-n-butoxide, tin tetraacetylacetonate, tin tetraethylacetoacetate, tin tetrapropylacetoacetate, tin tetrabutylacetoacetate, tin dibutyldilaurate, tin dibutyldioctoate or tin dioctyldilaurate.
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