CN118931317B - Polyurethane modified epoxy water-based self-adhesive insulating varnish for enameled wire and preparation method and application thereof - Google Patents
Polyurethane modified epoxy water-based self-adhesive insulating varnish for enameled wire and preparation method and application thereof Download PDFInfo
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- CN118931317B CN118931317B CN202411178896.2A CN202411178896A CN118931317B CN 118931317 B CN118931317 B CN 118931317B CN 202411178896 A CN202411178896 A CN 202411178896A CN 118931317 B CN118931317 B CN 118931317B
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- 239000000853 adhesive Substances 0.000 title claims abstract description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 12
- 239000004814 polyurethane Substances 0.000 title claims abstract description 12
- 239000004593 Epoxy Substances 0.000 title claims abstract description 9
- 239000002966 varnish Substances 0.000 title claims description 6
- 238000002360 preparation method Methods 0.000 title abstract description 12
- 239000003822 epoxy resin Substances 0.000 claims abstract description 40
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 40
- 239000003973 paint Substances 0.000 claims abstract description 26
- 229920005749 polyurethane resin Polymers 0.000 claims abstract description 20
- 239000008367 deionised water Substances 0.000 claims abstract description 16
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 16
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims abstract description 12
- 239000000080 wetting agent Substances 0.000 claims abstract description 10
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000002904 solvent Substances 0.000 claims abstract description 7
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000001914 filtration Methods 0.000 claims abstract description 6
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 239000004841 bisphenol A epoxy resin Substances 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims abstract description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 20
- 239000011259 mixed solution Substances 0.000 claims description 13
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical class CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 claims description 11
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 10
- 238000000137 annealing Methods 0.000 claims description 5
- 125000003118 aryl group Chemical group 0.000 claims description 5
- 229940028356 diethylene glycol monobutyl ether Drugs 0.000 claims description 5
- JCGNDDUYTRNOFT-UHFFFAOYSA-N oxolane-2,4-dione Chemical compound O=C1COC(=O)C1 JCGNDDUYTRNOFT-UHFFFAOYSA-N 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 claims description 4
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 claims description 2
- 239000006185 dispersion Substances 0.000 claims 1
- 238000004090 dissolution Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000000576 coating method Methods 0.000 abstract description 13
- 239000011248 coating agent Substances 0.000 abstract description 12
- 238000003756 stirring Methods 0.000 abstract description 11
- 230000001070 adhesive effect Effects 0.000 abstract description 4
- 229920005989 resin Polymers 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 4
- 238000004806 packaging method and process Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 210000003298 dental enamel Anatomy 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 239000004962 Polyamide-imide Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- DHKHKXVYLBGOIT-UHFFFAOYSA-N acetaldehyde Diethyl Acetal Natural products CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 description 1
- 125000002777 acetyl group Chemical class [H]C([H])([H])C(*)=O 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920003055 poly(ester-imide) Polymers 0.000 description 1
- 229920002312 polyamide-imide Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- 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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- 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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
-
- 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
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Paints Or Removers (AREA)
Abstract
The invention relates to polyurethane modified epoxy water-based self-adhesive insulating paint for enameled wires, and a preparation method and application thereof. The water-based self-adhesive insulating paint is prepared from the following raw materials of modified epoxy resin, water-based polyurethane resin, a wetting agent and deionized water, wherein the modified epoxy resin is prepared by mixing and dissolving bisphenol A epoxy resin, phenolic epoxy resin and a solvent A at 130 ℃, then dropwise adding a mixture B, carrying out a mixing reaction, cooling to 60 ℃, adding diethanolamine for mixing reaction, finally adding deionized water, stirring and dispersing uniformly, cooling to 50 ℃, and filtering, wherein the water-based polyurethane resin is obtained by carrying out deblocking at 70-110 ℃. The water-based self-adhesive insulating paint is environment-friendly and safe, can be rapidly cured at 280 ℃, and also obviously improves the flexibility, adhesive force and electrical property of the obtained coating, wherein the self-adhesive force is 150 degrees and 30 minutes and is more than 2.1N, and is approximately 7 times of that of an oily national standard.
Description
Technical Field
The invention belongs to the field of self-adhesive waterborne self-adhesive insulating paint for wires, and particularly relates to polyurethane modified epoxy waterborne self-adhesive insulating paint for enameled wires, and a preparation method and application thereof.
Background
Enameled wires are a main variety of winding wires, generally consist of three parts, namely a conductor, an insulating bottom layer and a self-adhesive insulating surface layer, and the application fields of the enameled wires comprise an inductance coil, an electromagnetic coil, an alternating current-direct current motor, the automobile industry and the like. The enameled wire is mainly used for a motor running under high power and high load, and under the condition of alternating current high frequency and high voltage, the polymer of the insulating paint film is easy to generate local ionization, when the electric field strength reaches the critical field strength, the gas nearby can generate local ionization, blue fluorescent discharge occurs, and ozone is generated. Therefore, it is required to have good weather resistance, abrasion resistance, adhesion, and insulation properties. The existing self-adhesive enameled wires are divided into acetal enameled wires, polyester enameled wires, polyurethane enameled wires, modified polyester enameled wires, polyester imide/polyamide imide enameled wires, polyimide enameled wires and the like according to insulating materials.
The traditional polyurethane enamelled wire is formed by coating oily polyurethane insulating paint, is not environment-friendly, and has high brittleness and small self-adhesive force.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention further provides the polyurethane modified epoxy water-based self-adhesive insulating paint for the enameled wire, and the preparation method and the application thereof by synthesizing the water-based polyurethane resin, which are environment-friendly and can also remarkably improve the flexibility, the adhesive force and the electrical property of the self-adhesive insulating layer.
The invention adopts the following technical scheme:
The invention provides polyurethane modified epoxy water-based self-adhesive insulating paint for enameled wires, which is prepared from the following raw materials of modified epoxy resin, water-based polyurethane resin, wetting agent and deionized water, wherein the modified epoxy resin is prepared by mixing and dissolving bisphenol A epoxy resin, phenolic epoxy resin and solvent A at 130 ℃, then dropwise adding a mixture B for mixing reaction, then cooling to 60 ℃, adding diethanolamine for mixing reaction, finally adding deionized water, stirring and dispersing uniformly, cooling to 50 ℃ and filtering, the solvent A is one or more of diethylene glycol monobutyl ether, isomers of diethylene glycol monobutyl ether and ethylene glycol monobutyl ether, and the mixed solution B is a mixture of phosphoric acid and ethylene glycol monobutyl ether;
The aqueous polyurethane resin is an aqueous polyurethane resin with a deblocking temperature of 70-110 ℃.
In some embodiments, the aqueous self-adhesive insulating paint is prepared from the following raw materials, by weight, 60-80% of modified epoxy resin, 3-8% of aqueous polyurethane resin, 0-1% of wetting agent and the balance of deionized water.
In some embodiments, the wetting agent is BYK349.
In some embodiments, the aqueous polyurethane resin is an aromatic aqueous polyurethane resin.
In some embodiments, in the preparation process of the modified epoxy resin, according to the mass ratio, bisphenol A type epoxy resin, phenolic epoxy resin, solvent A, mixed solution B, deionized water=30-40:6-10:20-30:4-5:30-40.
In some embodiments, the bisphenol a epoxy resin employed in the modified epoxy resin preparation process is one or more of e20\e12\e06 epoxy resin.
In some embodiments, the phenolic epoxy resin used in the modified epoxy resin preparation process is 638s epoxy resin.
In some embodiments, in the mixed solution B, phosphoric acid is 85wt% phosphoric acid, and ethylene glycol monobutyl ether=1:1-3.0.
In some embodiments, the modified epoxy resin has a viscosity of 4000-60000 mpa.s, a solids content of 38-40%, and a ph=7.0-9.0.
In still another aspect, the invention further provides application of the water-based self-adhesive insulating paint, the water-based self-adhesive insulating paint is coated on the surface of a wire rod through an enamelling machine, the linear speed is 70-300m/min, the curing temperature is 220-280 ℃, and the annealing temperature is 420-480 ℃. In some preferred embodiments, the line speed is 170min, the curing temperature is 260 ℃, and the annealing temperature is 400 ℃.
Compared with the prior art, the invention has the following beneficial effects:
The waterborne environment-friendly polyurethane modified epoxy waterborne self-adhesive insulating paint for the self-adhesive wire, which is prepared by improving the preparation method of the epoxy resin and combining the waterborne polyurethane resin, is non-flammable and non-explosive, safe and environment-friendly, has a low formula VOC, does not volatilize pungent odor, has a coating curing temperature lower than an oily curing temperature by 100 ℃, can be rapidly cured within 260 ℃, has good coating flexibility, has no pinholes, is high pressure resistant, has good self-adhesive property, and has a self-adhesive force of 150 ℃ for 30 minutes of more than 2.1N, and is nearly 7 times of that of an oily national standard.
Drawings
FIG. 1 is a drawing of an enamelled wire machine in an example of application of the present invention;
fig. 2 is a photograph of a coated enamel wire in an application example of the present invention;
FIG. 3 is a photograph of a modified resin of example 2 of the present invention;
fig. 4 is a photograph of a self-adhesive insulating paint of example 4 of the present invention.
Detailed Description
In order that the invention may be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments that are illustrated in the appended drawings. Preferred embodiments of the present invention are given in the examples. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The reagents used in the following examples, unless otherwise indicated, were all commercially available, and the methods used in the following examples, unless otherwise indicated, were all accomplished by conventional methods.
TABLE 1 raw material composition of modified epoxy resins in examples 1-3
Example 1 preparation of modified epoxy resin:
According to parts by weight, 26.4 parts of E20 resin, 6.6 parts of 638S epoxy resin and 20.6 parts of diethylene glycol monobutyl ether are stirred and dissolved uniformly at 130 ℃, then a mixed solution B is dripped for 20min, the mixed solution B is formed by mixing 2.1 parts of 85% phosphoric acid solution and 3.0 parts of ethylene glycol monobutyl ether, stirring is kept for reaction for 1h, cooling to 60 ℃, 4.8 parts of diethanolamine is added for stirring for 20min, then deionized water is added for 3 times for 36.5 parts, stirring is uniformly kept for 30min, cooling to 50 ℃, filtering and packaging are carried out, and the modified epoxy resin is obtained.
The appearance of the resulting sample was a opalescent viscous homogeneous liquid with a viscosity of 5500 mpa.s, a solids content of 40% and a ph=7.5.
Example 2 preparation of modified epoxy resin:
According to parts by weight, 24.3 parts of E12 resin, 9.3 parts of 638S epoxy resin and 21.2 parts of ethylene glycol monobutyl ether are stirred and dissolved uniformly at 130 ℃, then a mixed solution B is dripped for 20min, the mixed solution B is formed by mixing 1.3 parts of 85% phosphoric acid solution and 3.0 parts of ethylene glycol monobutyl ether, stirring is kept for reaction for 1h, cooling to 60 ℃, 2.4 parts of diethanolamine is added for stirring for 20min, then deionized water is added for 3 times, stirring is kept uniformly for 30min, cooling to 50 ℃, filtering and packaging are carried out, and the modified epoxy resin is obtained.
The resulting sample, as shown in fig. 3, was a creamy, homogeneous liquid with a viscosity of 11400mpa·s, a solids content of 38%, and a ph=8.5.
Example 3 preparation of modified epoxy resin:
According to parts by weight, 8 parts of E20 resin, 18.2 parts of E06 resin, 7.5 parts of 638S epoxy resin and 24.0 parts of ethylene glycol monobutyl ether are uniformly stirred and dissolved at 130 ℃, then a mixed solution B is dropwise added for 20min, the mixed solution B is formed by mixing 1.3 parts of 85% phosphoric acid solution and 3.0 parts of ethylene glycol monobutyl ether, stirring is kept for reaction for 1h, cooling to 60 ℃, adding 3.0 parts of diethanolamine and stirring for 20min, adding 35 parts of deionized water for 3 times, uniformly stirring and keeping for 30min, cooling to 50 ℃, filtering and packaging, and obtaining the modified epoxy resin.
The appearance of the sample obtained was a creamy homogeneous liquid, with a viscosity of 49000 mpa.s, a solids content of 38% and a ph=8.5.
Table 2 raw material Components of each of the aqueous self-adhesive insulating paints of examples 4 to 6
| Material | Example 4 | Example 5 | Example 6 |
| Modified epoxy resin | 72 | 75 | 68 |
| Aqueous polyurethane resin | 5.5 | 8.0 | 3.4 |
| Wetting agent Byk349 | 0.3 | 0.3 | 0.3 |
| Deionized water | 22.2 | 16.7 | 28.3 |
| Total amount of | 100 | 100 | 100 |
Example 4
72 Parts of modified epoxy resin prepared in example 1, 5.5 parts of aromatic aqueous polyurethane resin with deblocking temperature of 70-110 ℃ and 0.3 part of wetting agent Byk349 and 22.2 parts of deionized water are stirred and mixed uniformly according to parts by weight, and the aqueous self-adhesive insulating paint is obtained, and a product picture is shown in figure 4.
Example 5
75 Parts of modified epoxy resin prepared in example 2, 8.0 parts of aromatic aqueous polyurethane resin with deblocking temperature of 70-110 ℃, 0.3 parts of wetting agent Byk349 and 16.7 parts of deionized water are stirred and mixed uniformly according to parts by weight, so that the aqueous self-adhesive insulating paint is obtained.
Example 6
68 Parts of modified epoxy resin prepared in example 3, 3.4 parts of aromatic aqueous polyurethane resin with deblocking temperature of 70-110 ℃, 0.3 part of wetting agent Byk349 and 28.3 parts of deionized water are stirred and mixed uniformly according to parts by weight, so that the aqueous self-adhesive insulating paint is obtained.
Application example
The aqueous self-adhesive insulating varnish obtained in example 4 was subjected to a coating experiment using a 4-head DV60 medium-speed enamelled wire machine (refer to FIG. 1), and wires of the same material were coated with the same primer, except for the diameters. Coating experiments were performed. Fig. 2 is a photograph of the coated enamel wire.
Table 3 application example coating process parameters and performance test indicators
As can be seen from Table 3, the coating performance obtained by coating the aqueous self-adhesive insulating paint in the embodiment of the invention can be better than the national standard requirements in the range of 70-170m/min of linear speed, 240-280 ℃ of curing temperature and 420-480 ℃ of annealing temperature, and particularly, the coating performance is the best when the linear speed is 170min, the curing temperature is 280 ℃ and the annealing temperature is 400 ℃.
In summary, the polyurethane modified epoxy water-based self-adhesive insulating paint for the self-adhesive wire adopts water-based resin to replace oiliness, and uses polyurethane resin modified epoxy resin, so that the safety (incombustible and non-explosive paint liquid) and environmental protection of the self-adhesive water-based self-adhesive insulating paint are greatly improved, the curing temperature of the coating is reduced, the curing temperature is 100 ℃ lower than that of oiliness, the coating can be rapidly cured at 280 ℃, and the flexibility, adhesive force and electrical performance of the obtained coating are also obviously improved, wherein the self-adhesive force is 150 ℃ for 30 minutes, and the adhesive force is more than 2.1N and is nearly 7 times that of an oily national standard.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (6)
1. The polyurethane modified epoxy water-based self-adhesive insulating paint for the enameled wire is characterized by being prepared from the following raw materials, by weight, 60-80% of modified epoxy resin, 3-8% of water-based polyurethane resin, 0-1% of wetting agent and the balance of deionized water;
The modified epoxy resin is prepared by mixing bisphenol A epoxy resin, phenolic epoxy resin and solvent A at 130 ℃ for dissolution, then dropwise adding mixed solution B for mixing reaction, then cooling to 60 ℃, adding diethanolamine for mixing reaction, finally adding deionized water for uniform dispersion, cooling to 50 ℃ for filtration, wherein the solvent A is one or more of diethylene glycol monobutyl ether, isomers of diethylene glycol monobutyl ether and ethylene glycol monobutyl ether, the mixed solution B is a mixture of phosphoric acid and ethylene glycol monobutyl ether, and the phenolic epoxy resin is 638s epoxy resin;
The bisphenol A type epoxy resin is one or more of E20, E12 and E06 epoxy resins;
According to the mass ratio, bisphenol A epoxy resin, phenolic epoxy resin, solvent A and mixed solution B, wherein deionized water=30-40:6-10:20-30:4-5:30-40;
The aqueous polyurethane resin is an aqueous polyurethane resin with a deblocking temperature of 70-110 ℃.
2. The aqueous self-adhesive insulating varnish according to claim 1, wherein the wetting agent is BYK349.
3. The aqueous self-adhesive insulating paint according to claim 1, wherein the aqueous polyurethane resin is an aromatic aqueous polyurethane resin.
4. The aqueous self-adhesive insulating paint according to claim 1, wherein in the mixed solution B, phosphoric acid is ethylene glycol monobutyl ether=1:1-3.0, and the phosphoric acid is 85wt% of phosphoric acid.
5. The aqueous self-adhesive insulating varnish according to claim 1, wherein the modified epoxy resin has a viscosity of 4000 to 60000 mpa.s, a solid content of 38 to 40% and a ph=7.0 to 9.0.
6. The use of the aqueous self-adhesive insulating varnish according to any one of claims 1 to 5, characterized in that the aqueous self-adhesive insulating varnish according to any one of claims 1 to 5 is coated on the surface of a wire by an enamelling machine, the wire diameter is 0.04 to 0.80mm, the production line speed is 70 to 300m/min, the curing temperature is 200 to 280 ℃, and the annealing temperature is 420 to 480 ℃.
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| CN202411178896.2A CN118931317B (en) | 2024-08-27 | 2024-08-27 | Polyurethane modified epoxy water-based self-adhesive insulating varnish for enameled wire and preparation method and application thereof |
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| CN113004770A (en) * | 2021-04-29 | 2021-06-22 | 江苏晨光涂料有限公司 | High-thermal-conductivity corrosion-resistant electrical steel self-bonding coating and preparation method thereof |
| CN114316746A (en) * | 2022-01-06 | 2022-04-12 | 广东顺德大地缘新材料有限公司 | Water-based nano insulating paint and preparation method and application thereof |
| CN116675955A (en) * | 2023-04-26 | 2023-09-01 | 衡阳华灏新材料科技有限公司 | Water-based epoxy resin composition and application thereof as electromagnetic shielding film insulating layer |
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| CN101117377A (en) * | 2007-09-18 | 2008-02-06 | 天津大学 | The preparation method of waterborne epoxy resin |
| CN101857764B (en) * | 2010-06-30 | 2012-05-09 | 溧阳市佳禾电子材料有限公司 | Moisture-resistant oil-resistant electromagnetic wire epoxy self-adhesive paint |
| CN101899196B (en) * | 2010-07-29 | 2012-10-31 | 华南理工大学 | A kind of aqueous novolac epoxy resin emulsion and preparation method thereof |
| CN110240711B (en) * | 2019-05-17 | 2022-05-17 | 江苏富琪森新材料有限公司 | Water-based epoxy emulsifier and preparation and application thereof |
| CN115011203A (en) * | 2022-06-21 | 2022-09-06 | 佛山市顺德区博宜防腐涂料科技有限公司 | Epoxy modified polyurethane low-crosslinking-temperature water-based insulating paint and preparation method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113004770A (en) * | 2021-04-29 | 2021-06-22 | 江苏晨光涂料有限公司 | High-thermal-conductivity corrosion-resistant electrical steel self-bonding coating and preparation method thereof |
| CN114316746A (en) * | 2022-01-06 | 2022-04-12 | 广东顺德大地缘新材料有限公司 | Water-based nano insulating paint and preparation method and application thereof |
| CN116675955A (en) * | 2023-04-26 | 2023-09-01 | 衡阳华灏新材料科技有限公司 | Water-based epoxy resin composition and application thereof as electromagnetic shielding film insulating layer |
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