CN111574919A - Golden polyurethane coating and preparation method thereof, and enameled wire - Google Patents
Golden polyurethane coating and preparation method thereof, and enameled wire Download PDFInfo
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- CN111574919A CN111574919A CN202010530480.8A CN202010530480A CN111574919A CN 111574919 A CN111574919 A CN 111574919A CN 202010530480 A CN202010530480 A CN 202010530480A CN 111574919 A CN111574919 A CN 111574919A
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- golden
- polyurethane coating
- polyurethane
- dye
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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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
-
- 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
- C09D7/61—Additives non-macromolecular inorganic
-
- 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
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3009—Sulfides
-
- 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
- C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
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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)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Organic Insulating Materials (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a golden polyurethane coating, a preparation method thereof and an enameled wire. The golden polyurethane coating comprises the following components in parts by mass: 500 parts of polyurethane solution, 3-5 parts of golden dye, 150 parts of dispersion solvent and 50-80 parts of thermosetting phenolic resin, wherein the golden dye is selected from tin sulfide, and the dispersion solvent is selected from aromatic solvent or amide solvent. Tin sulfide with good heat resistance is added into the golden polyurethane coating to serve as a golden dye, and the components are reasonable in proportion and cannot be used. The golden polyurethane coating containing other golden dyes is proved by the inventor experiment that the golden dye is not decomposed at high temperature and has good coloring performance.
Description
Technical Field
The invention relates to the field of insulating coatings, and particularly relates to a golden polyurethane coating, a preparation method thereof and an enameled wire.
Background
The golden polyurethane coating is an important insulating coating, has excellent electrical property, mechanical property and chemical property, and has direct welding property, so that the golden polyurethane coating is widely applied to weak current electric appliance products such as precise coils, motors, instruments, household appliances and the like. Traditional golden polyurethane enameled wire decolours easily, and golden dye coloring effect is relatively poor, and the hue can't satisfy the actual production demand. In addition, a large amount of pinholes and particles are easily generated on the surface of the enameled wire which is usually prepared from the currently marketed golden polyurethane coating, the electrical property of the enameled wire is easily reduced due to the pinholes and the particles, and the short circuit of the enameled wire is seriously caused.
Disclosure of Invention
The invention aims to provide a golden polyurethane coating with excellent coloring performance, and an enameled wire prepared from the coating has fewer pinholes and particles on the surface.
In order to solve the technical problem, the invention provides a golden polyurethane coating which comprises the following components in parts by mass:
wherein the golden dye is selected from tin sulfide, and the dispersing solvent is selected from aromatic solvents or amide solvents.
Tin sulfide with good heat resistance is added into the golden polyurethane coating to serve as a golden dye, and the components are reasonable in proportion and cannot be used. The golden polyurethane coating containing other golden dyes is proved by the inventor experiment that the golden dye is not decomposed at high temperature and has good coloring performance.
In addition, the main function of the thermosetting phenolic resin is to form gel with golden dye particles so as to ensure that the golden polyurethane coating does not separate out golden dye after being stored for a long time.
The aromatic solvent or the amide solvent is used as the dispersing agent of the golden dye, the golden dye tin sulfide can be uniformly dispersed in the polyurethane solution, and subsequent tests prove that compared with the method of dissolving the golden dye in a phenol solvent, the gold dye is not easy to oxidize and discolor, and fewer pinholes and particles are generated on the surface of the obtained enameled wire.
In one embodiment, the special paint also comprises 1-2 parts of arylamine antioxidant.
In one embodiment, the aromatic amine antioxidant is selected from at least one of N, N-di-sec-butyl-p-phenylenediamine, N-bis (1, 4-dimethylpentyl) -p-phenylenediamine, N-phenyl-N-isopropyl-p-phenylenediamine, N-phenyl-N-alkyl-p-phenylenediamine, diisooctyl-p-phenylenediamine, and dinonyl-p-phenylenediamine.
In one embodiment, the thermosetting phenolic resin is at least one selected from rosin-modified phenolic resin, butanol-etherified phenolic resin, p-tert-butyl phenolic resin and p-phenyl phenolic resin.
In one embodiment, the polyurethane in the polyurethane solution accounts for 26-45% of the polyurethane solution by mass.
In one embodiment, the amide-based solvent is at least one selected from the group consisting of N-methylpyrrolidone, N-dimethylformamide, N-dimethylacetamide, and N, N-diethylformamide; the aromatic solvent is at least one selected from toluene, xylene, 100# petroleum solvent and 150# petroleum solvent.
The invention also provides a preparation method of the golden polyurethane coating, which comprises the following steps:
the raw material components of the golden polyurethane coating according to any of the invention are mixed.
In one embodiment, in the step of mixing the raw material components of the golden polyurethane coating, the golden dye is added into a dispersion solvent and mixed to obtain a golden dye dispersion, and the golden dye dispersion is mixed with the polyurethane solution and the thermosetting phenolic resin to obtain the golden polyurethane coating.
The invention also provides a polyurethane enameled wire which comprises a conductor and an insulating layer arranged outside the conductor, wherein the insulating layer contains the golden polyurethane coating.
Detailed Description
The present invention is further described below in conjunction with specific examples to enable those skilled in the art to better understand the present invention and to practice it, but the examples are not intended to limit the present invention.
The golden dye is generally a metal dye which is not easy to disperse in a polyurethane system, so that the coating has poor operability, a large number of pinholes and particles are easily generated on the surface of the prepared enameled wire, the insulating property of the enameled wire is influenced, the coating has poor timeliness, and the golden dye is precipitated after being placed for a long time. In addition, the traditional polyurethane coating uses a large amount of phenolic solvents, and the phenolic solvents are easy to oxidize and discolor, so that the hue of the golden enameled wire is influenced.
The invention provides a golden polyurethane coating which comprises the following components in parts by mass:
wherein the golden dye is selected from tin sulfide, and the dispersing solvent is selected from aromatic solvents or amide solvents.
The thermosetting phenolic resin is mainly used for forming gel with the golden dye, so that the golden dye is prevented from being separated out after the golden paint is stored.
Further, the thermosetting phenolic resin is selected from at least one of rosin modified phenolic resin, butanol etherified phenolic resin, p-tert-butyl phenolic resin and p-phenyl phenolic resin.
In one embodiment, the polyurethane in the polyurethane solution accounts for 26-45% of the polyurethane solution by mass. The proportioning range is more beneficial to the golden polyurethane coating finished product not to be layered and condensed in the long-term storage process, thereby being beneficial to long-term storage.
The invention provides a golden polyurethane coating which comprises the following components in parts by mass:
the arylamine antioxidant has the main function of preventing the golden polyurethane coating finished product from layering and condensing in the long-term storage process. Further, the aromatic amine antioxidant is at least one selected from the group consisting of N, N-di-sec-butyl-p-phenylenediamine, N-bis (1, 4-dimethylpentyl) -p-phenylenediamine, N-phenyl-N-isopropyl-p-phenylenediamine, N-phenyl-N-alkyl-p-phenylenediamine, diisooctyl-p-phenylenediamine and dinonyl-p-phenylenediamine.
In one embodiment, the amide-based solvent is at least one selected from the group consisting of N-methylpyrrolidone, N-dimethylformamide, N-dimethylacetamide, and N, N-diethylformamide; the aromatic solvent is at least one selected from toluene, xylene, 100# petroleum solvent and 150# petroleum solvent.
Tin sulfide with good heat resistance is added into the golden polyurethane coating to serve as a golden dye, and the components are reasonable in proportion and cannot be used. The golden polyurethane coating containing other golden dyes is proved by the inventor experiment that the golden dye is not decomposed at high temperature and has good coloring performance.
The invention also provides a polyurethane enameled wire which comprises a conductor and an insulating layer arranged outside the conductor, wherein the insulating layer contains the golden polyurethane coating.
The invention also provides a preparation method of the golden polyurethane coating, which comprises the following steps:
the raw material components of the golden polyurethane coating according to any of the invention are mixed.
In one embodiment, in the step of mixing the raw material components of the golden polyurethane coating, the golden dye is added into the dispersion solvent and mixed to obtain a golden dye dispersion liquid, then the golden dye dispersion liquid is mixed with the polyurethane solution, and then the thermosetting phenolic resin is added and mixed to obtain the golden polyurethane coating.
Furthermore, in the mixing step, a grinding wheel is adopted for full grinding or an ultrasonic stirring method is adopted for mixing, so that the aim of uniform mixing is fulfilled. Wherein, the grinding is carried out at the heating temperature of 60-80 ℃ and the rotation speed of 7500-8500rpm and the linear speed of 30-50m/s for 2-3 hours. Wherein the ultrasonic stirring is ultrasonic stirring dispersion at 25-30kHz for 1-3 hours.
Wherein, grind and adopt two grinding miller of laminating each other to grind, can make golden dye dispersion like this with the golden pigment's in the mixed liquid that golden polyurethane solution constitutes particle diameter is more refined, and still do benefit to golden polyurethane and wrap up the golden pigment that refines wherein, and difficult golden pigment is appeared from golden polyurethane coating.
Example 1
A preparation method of a golden polyurethane coating comprises the following steps:
3g of tin sulfide gold dye, 100g of an amide solvent (N-methylpyrrolidone) were added to a homogenizer, followed by milling at 3000rpm for 2 hours, then 400g of a polyurethane solution (the solid content of the polyurethane solution was 35% by weight) was added, followed by heating to 60 degrees Celsius, and then ultrasonic stirring at 25kHz was performed for dispersion for 2 hours. Adding 52g of thermosetting phenolic resin (p-tert-butyl phenolic resin), heating to 60 ℃, grinding for 2 hours by using a grinding wheel at the rotating speed of 8000rpm and the linear speed of 40m/s, and filtering by using a filter screen of 200 meshes to obtain the golden polyurethane coating.
A preparation method of an enameled wire comprises the following steps:
the golden polyurethane coating is coated on a phi 0.05mm copper wire by a mould, the coating frequency is 12 times, repeated recoating is carried out, the golden polyurethane coating is placed in a 2.8m baking furnace for baking, the inlet and outlet temperatures of the baking furnace are respectively 300 and 340 ℃, the baking time is 4.5s, and the moving linear speed of the copper wire is 480m/min, so that the enameled wire is obtained.
Example 2
A preparation method of a golden polyurethane coating comprises the following steps:
5g of tin sulfide gold-colored dye and 150g of an amide solvent (N-methylpyrrolidone) were added to a homogenizer, followed by milling at 3000rpm for 2 hours, then 500g of a polyurethane solution (the solid content of the polyurethane solution was 35 wt%) was added, followed by heating to 60 degrees Celsius, and then ultrasonic stirring at 25kHz was performed for dispersion for 2 hours. Adding 80g of thermosetting phenolic resin (p-tert-butyl phenolic resin), heating to 60 ℃, grinding for 2 hours by using a grinding wheel at the rotating speed of 8000rpm and the linear speed of 40m/s, and filtering by using a filter screen of 200 meshes to obtain the golden polyurethane coating.
A preparation method of an enameled wire comprises the following steps:
the golden polyurethane coating is coated on a phi 0.05mm copper wire by a mould, the coating frequency is 12 times, repeated recoating is carried out, the golden polyurethane coating is placed in a 2.8m baking furnace for baking, the inlet and outlet temperatures of the baking furnace are respectively 300 and 340 ℃, the baking time is 4.5s, and the moving linear speed of the copper wire is 480m/min, so that the enameled wire is obtained.
Example 3
A preparation method of a golden polyurethane coating comprises the following steps:
4g of tin sulfide gold dye and 130g of an amide solvent (N-methylpyrrolidone) were added to a homogenizer, followed by milling at 3000rpm for 2 hours, then 450g of a polyurethane solution (the solid content of the polyurethane solution was 35% by weight) was added, followed by heating to 60 degrees Celsius, and then ultrasonic stirring at 25kHz was performed for dispersion for 2 hours. Adding 70g of thermosetting phenolic resin (p-tert-butylphenol resin), finally adding 1g of arylamine antioxidant (N, N-di-sec-butyl-p-phenylenediamine), heating to 60 ℃, grinding for 2 hours by using a grinding wheel at the rotating speed of 8000rpm and the linear speed of 40m/s, and filtering by using a 200-mesh filter screen to obtain the golden polyurethane coating.
A preparation method of an enameled wire comprises the following steps:
the golden polyurethane coating is coated on a phi 0.05mm copper wire by a mould, the coating frequency is 12 times, repeated recoating is carried out, the golden polyurethane coating is placed in a 2.8m baking furnace for baking, the inlet and outlet temperatures of the baking furnace are respectively 300 and 340 ℃, the baking time is 4.5s, and the moving linear speed of the copper wire is 480m/min, so that the enameled wire is obtained.
Example 4
A preparation method of a golden polyurethane coating comprises the following steps:
4g of tin sulfide gold dye, 130g of an aromatic solvent (xylene) were added to a homogenizer, followed by milling at 3000rpm for 2 hours, then 450g of a polyurethane solution (the solid content of the polyurethane solution was 35 wt%) was added, followed by heating to 60 degrees Celsius, and then ultrasonic stirring at 25kHz was performed for dispersion for 2 hours. Adding 70g of thermosetting phenolic resin (p-tert-butylphenol resin), finally adding 1g of arylamine antioxidant (N, N-di-sec-butyl-p-phenylenediamine), heating to 60 ℃, grinding for 2 hours by using a grinding wheel at the rotating speed of 8000rpm and the linear speed of 40m/s, and filtering by using a 200-mesh filter screen to obtain the golden polyurethane coating.
A preparation method of an enameled wire comprises the following steps:
the golden polyurethane coating is coated on a phi 0.05mm copper wire by a mould, the coating frequency is 12 times, repeated recoating is carried out, the golden polyurethane coating is placed in a 2.8m baking furnace for baking, the inlet and outlet temperatures of the baking furnace are respectively 300 and 340 ℃, the baking time is 4.5s, and the moving linear speed of the copper wire is 480m/min, so that the enameled wire is obtained.
Comparative example 1
The preparation method of the golden polyurethane coating is substantially the same as that of example 1, except that: the golden dye is selected from lutein.
Comparative example 2
The preparation method of the golden polyurethane coating is substantially the same as that of example 1, except that: the polyurethane solution is 300g, the golden dye is 6g, the aromatic solvent is xylene 100g, and the thermosetting phenolic resin is p-tert-butyl phenolic resin 40 g.
Comparative example 3
The preparation method of the golden polyurethane coating is substantially the same as that of example 1, except that: the same amount of phenol as the phenolic solvent is used instead of the amide solvent.
Evaluation of Effect
The quality of the enameled wire is evaluated and is shown in table 1. And after the golden polyurethane coating is stored for 1 year, respectively coating the upper layer coating and the lower layer coating on an aluminum plate at 180 ℃, baking for 15min, and determining the difference of hue and chroma numbers so as to judge whether the golden dye is separated out in a layered manner.
TABLE 1
Remarking: the golden chroma number is marked as 1 to 10# from shallow to deep.
As can be seen from Table 1, the evaluation of each index of the enamel wire in each example is obviously superior to that of the comparative example group, while the quality of the enamel wire in examples 3 and 4 is better, the surface of the enamel wire has few particles, almost no pinholes are generated, and the color of the enamel wire is golden, and the color is moderate, so that the production requirement can be met, thereby showing that the golden dye in the examples is not decomposed at the high temperature of a baking oven, the dyeing effect is good, while the enamel wire in comparative example 1 is not colored, mainly because the heat resistance of the used dye is poor, and the decomposition is caused after baking.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (9)
1. The golden polyurethane coating is characterized by comprising the following components in parts by mass:
wherein the golden dye is selected from tin sulfide, and the dispersing solvent is selected from aromatic solvents or amide solvents.
2. The golden polyurethane coating as claimed in claim 1, further comprising 1-2 parts of aromatic amine antioxidant.
3. The gold-colored polyurethane coating of claim 2, characterized in that: the aromatic amine antioxidant is at least one selected from N, N-di-sec-butyl-p-phenylenediamine, N-bis (1, 4-dimethylpentyl) -p-phenylenediamine, N-phenyl-N-isopropyl-p-phenylenediamine, N-phenyl-N-alkyl-p-phenylenediamine, diisooctyl-p-phenylenediamine and dinonyl-p-phenylenediamine.
4. The gold-colored polyurethane coating according to any one of claims 1 to 3, characterized in that: the thermosetting phenolic resin is at least one selected from rosin modified phenolic resin, butanol etherified phenolic resin, p-tert-butyl phenolic resin and p-phenyl phenolic resin.
5. The golden polyurethane coating according to any one of claims 1 to 3, wherein the polyurethane in the polyurethane solution is present in an amount of 26 to 45% by mass of the polyurethane solution.
6. The gold-colored polyurethane coating according to any one of claims 1 to 3, wherein the amide-based solvent is selected from at least one of N-methylpyrrolidone, N-dimethylformamide, N-dimethylacetamide, and N, N-diethylformamide; the aromatic solvent is at least one selected from toluene, xylene, 100# petroleum solvent and 150# petroleum solvent.
7. The preparation method of the golden polyurethane coating is characterized by comprising the following steps:
the golden polyurethane coating according to any of claims 1 to 6, wherein the raw material components are mixed.
8. The method of claim 7, wherein in the step of mixing the raw material components of the golden polyurethane coating, the golden dye is added into a dispersion solvent and mixed to obtain a golden dye dispersion, and then the golden dye dispersion is mixed with the polyurethane solution and finally mixed with the thermosetting phenolic resin to obtain the golden polyurethane coating.
9. A polyurethane enameled wire, which is characterized by comprising a conductor and an insulating layer arranged outside the conductor, wherein the insulating layer contains the gold-colored polyurethane coating described in any one of claims 1-6.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010530480.8A CN111574919B (en) | 2020-06-11 | 2020-06-11 | Golden polyurethane coating and preparation method thereof, and enameled wire |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010530480.8A CN111574919B (en) | 2020-06-11 | 2020-06-11 | Golden polyurethane coating and preparation method thereof, and enameled wire |
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| CN111574919A true CN111574919A (en) | 2020-08-25 |
| CN111574919B CN111574919B (en) | 2021-11-19 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1011285A (en) * | 1961-04-03 | 1965-11-24 | Shawinigan Resins Corp | Method of insulating conductors |
| CN1919947A (en) * | 2006-09-08 | 2007-02-28 | 上海晟然绝缘材料有限公司 | High heat-stage non-pinhole polyesterimide enamelled wire insulating paint modifier |
| CN101848964A (en) * | 2007-06-12 | 2010-09-29 | 纳幕尔杜邦公司 | Insulation coating composition for electrical steel |
| CN102199394A (en) * | 2011-04-12 | 2011-09-28 | 苏州斯迪克电子胶粘材料有限公司 | Ultrasonic sealing paint used for preparing insulated bag of inner wall of plane casing and preparation method thereof |
| US20130309448A1 (en) * | 2010-09-11 | 2013-11-21 | Bayer Intellectual Property Gmbh | Coating based on polyurethane for display regions |
-
2020
- 2020-06-11 CN CN202010530480.8A patent/CN111574919B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1011285A (en) * | 1961-04-03 | 1965-11-24 | Shawinigan Resins Corp | Method of insulating conductors |
| CN1919947A (en) * | 2006-09-08 | 2007-02-28 | 上海晟然绝缘材料有限公司 | High heat-stage non-pinhole polyesterimide enamelled wire insulating paint modifier |
| CN101848964A (en) * | 2007-06-12 | 2010-09-29 | 纳幕尔杜邦公司 | Insulation coating composition for electrical steel |
| US20130309448A1 (en) * | 2010-09-11 | 2013-11-21 | Bayer Intellectual Property Gmbh | Coating based on polyurethane for display regions |
| CN102199394A (en) * | 2011-04-12 | 2011-09-28 | 苏州斯迪克电子胶粘材料有限公司 | Ultrasonic sealing paint used for preparing insulated bag of inner wall of plane casing and preparation method thereof |
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| CN111574919B (en) | 2021-11-19 |
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