CN116254034A - Inductor surface insulation spray adhesive material and preparation method thereof - Google Patents

Inductor surface insulation spray adhesive material and preparation method thereof Download PDF

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Publication number
CN116254034A
CN116254034A CN202310097759.5A CN202310097759A CN116254034A CN 116254034 A CN116254034 A CN 116254034A CN 202310097759 A CN202310097759 A CN 202310097759A CN 116254034 A CN116254034 A CN 116254034A
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sizing material
inductor
epoxy resin
surface insulation
diluent
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王兵
覃令灿
倪益春
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Shanghai Yinghedian Technology Co ltd
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Shanghai Yinghedian Technology Co ltd
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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
    • 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
    • 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
    • C09D5/08—Anti-corrosive paints
    • 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
    • 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
    • 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
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2237—Oxides; Hydroxides of metals of titanium
    • C08K2003/2241—Titanium dioxide

Abstract

The invention discloses an inductor surface insulation spraying adhesive material and a preparation method thereof. The insulating spraying adhesive material for the surface of the inductor has good adhesive force and spraying uniformity, so that the coating on the surface of the inductor is smooth and uniform in thickness, the thickness of the coating is easy to control, the spraying time can be shortened, and the production efficiency is improved; the inductor coating produced by the adhesive material has high strength, compactness and insulativity, and good wear resistance and electroplating tin climbing prevention effect; the surface coating of the inductor after spraying has good oxidation resistance and salt spray corrosion resistance, so that the inductor has excellent quality reliability, and the maximum salt spray test can be up to 48 hours.

Description

Inductor surface insulation spray adhesive material and preparation method thereof
Technical Field
The invention relates to the technical field of surface treatment of electrical elements, in particular to an inductor surface insulation spray coating material and a preparation method thereof.
Background
The inductor is also called choke, reactor, dynamic reactor, can convert electric energy into magnetic energy and store the magnetic energy, is widely used in the fields of mobile phones, computers, communication, aviation, automobiles, etc., when the inductor breaks down, the running of the electronic equipment can be seriously affected, therefore, the inductor is required to have extremely high quality reliability, if the inductor product is used in special environments such as acidity, alkalinity, high temperature, etc., the inductor base material is easy to age, the reliability quality is reduced, and the service life is shortened. Therefore, in order to protect the inductor, the surface oxidation resistance and the salt spray corrosion resistance of the inductor are increased, and a surface insulation spraying process is generally required to be added in production.
At present, a spraying adhesive material used for spraying the surface of an inductor in the industry is mainly formed by mixing epoxy resin and a diluent, but the spraying adhesive material ensures that the surface of the inductor is poor in high temperature resistance and salt spray corrosion resistance, and the quality of the inductor is rapidly reduced when the inductor is used in special environments such as high temperature, damp heat, salt spray and the like.
Disclosure of Invention
The invention aims to provide a high-temperature-resistant, moisture-resistant, heat-resistant and salt-fog-corrosion-resistant insulating spraying adhesive material for the surface of an inductor and a preparation method thereof.
In order to achieve the purpose of the invention, the invention firstly provides an inductor surface insulation spraying glue material, wherein the preparation raw materials of the glue material comprise a third glue stock, a fourth glue stock and a diluent, and the addition amounts of the substances are as follows in percentage by mass: the third sizing material comprises 20-50wt% of 20-60wt% of 20-50wt% of fourth sizing material, wherein the third sizing material is formed by mixing 20-60wt% of first sizing material and 40-80wt% of second sizing material, the first sizing material is thermosetting epoxy resin insulating paint, the second sizing material comprises ethyl acetate, epoxy resin, propylene glycol methyl ether acetate, n-butyl alcohol, pigment and amino resin, the fourth sizing material comprises ethyl acetate, epoxy resin, propylene glycol methyl ether acetate, acetone, n-butyl alcohol and amino resin, and the diluent comprises cyclohexanone and butanone.
Further, the thermosetting epoxy resin insulating paint comprises the following components in percentage by mass: 45wt% of isophorone, 20wt% of epoxy resin, 20wt% of methyl isobutyl ketone and 1wt% of carbon black.
Further, it is characterized in that: the second sizing material comprises the following components in percentage by mass: 78.5wt% of ethyl acetate, 6wt% of epoxy resin, 5wt% of propylene glycol methyl ether acetate, 5wt% of n-butanol, 4.0wt% of pigment and 1.5wt% of amino resin.
Further, the pigment is a gray pigment, and the composition components of the gray pigment comprise titanium white and carbon black.
Further, the fourth sizing material comprises the following components in percentage by mass: 80wt% of ethyl acetate, 7wt% of epoxy resin, 5wt% of propylene glycol methyl ether acetate, 3wt% of acetone, 3wt% of n-butanol and 2wt% of amino resin.
Further, the thinner comprises the following components in percentage by mass: 50wt% of cyclohexanone and 50wt% of butanone.
The invention also provides a preparation method of the inductor surface insulation spray adhesive material, which comprises the following steps:
s1, respectively carrying out homogenization pretreatment on a first sizing material and a second sizing material, wherein the first sizing material is thermosetting epoxy resin insulating paint, and the composition components of the second sizing material comprise ethyl acetate, epoxy resin, propylene glycol methyl ether acetate, n-butyl alcohol, pigment and amino resin;
s2, mixing 20-60 wt% of the first sizing material and 40-80 wt% of the second sizing material with the first sizing material subjected to homogenization pretreatment in the step S1, and uniformly stirring to obtain a third sizing material;
s3, adding a fourth sizing material and a diluent into the third sizing material, and uniformly mixing to obtain a mixed material, wherein the mass ratio of each material in the mixed material is 10-40 wt% of the third sizing material, 20-60 wt% of the fourth sizing material and 20-50 wt% of the diluent; the fourth sizing material comprises ethyl acetate, epoxy resin, propylene glycol methyl ether acetate, acetone, n-butyl alcohol and amino resin, and the diluent comprises cyclohexanone and butanone;
and S4, filtering the mixture by using a filter screen to remove large particulate matters and impurities, thereby obtaining the adhesive material which can be directly applied to the surface insulation spraying production operation of the inductor.
Further, in step S1, the homogenization pretreatment includes electric stirring and ultrasonic vibration.
In step S4, before the filtering treatment is performed on the mixture by using a filter screen, an ultrasonic vibration treatment is further performed; the filter screen is a 120-300 mesh filter screen.
Further, the ultrasonic oscillation time is 10-60 min, and the water temperature of the ultrasonic oscillation is 20-40 ℃.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses an inductor surface insulation spraying adhesive material and a preparation method thereof, wherein the adhesive material comprises four preparation raw materials, the four raw materials are mixed after being processed in batches, and finally the adhesive material which can be directly applied to the inductor surface insulation spraying production operation is obtained; the inductor coating produced by the adhesive material has high strength, compactness and insulativity, and good wear resistance and electroplating tin climbing prevention effect; the surface coating of the inductor after spraying has good oxidation resistance and salt spray corrosion resistance, so that the inductor has excellent quality reliability, and the maximum salt spray test can be up to 48 hours.
Drawings
Fig. 1: the embodiment of the invention provides a flow diagram of a preparation method of an inductor surface insulation spraying adhesive material.
Detailed Description
In the prior art, the spraying glue material used for spraying the surface of the inductor is mainly formed by mixing epoxy resin and a diluent, but the spraying glue material ensures that the surface of the inductor has poor high temperature resistance and salt spray corrosion resistance, and the quality of the inductor is rapidly reduced when the inductor is used in special environments such as high temperature, damp heat, salt spray and the like.
The invention is therefore to be considered in all respects as illustrative and not restrictive, and the invention will be described in detail with reference to the accompanying drawings and examples.
Referring to fig. 1, the invention provides a preparation method of an inductor surface insulation spray adhesive material, which comprises the steps of sequentially processing four raw materials in batches, mixing, and finally obtaining the adhesive material which can be directly applied to the inductor surface insulation spray production operation, wherein the preparation method comprises the following steps:
s1, respectively carrying out homogenization pretreatment on a first sizing material and a second sizing material, wherein the first sizing material is thermosetting epoxy resin insulating paint, and the composition components of the second sizing material comprise ethyl acetate, epoxy resin, propylene glycol methyl ether acetate, n-butyl alcohol, pigment and amino resin;
specifically, the first sizing material is thermosetting epoxy resin insulating paint JMC-700K produced by the Japanese LORD company, and the first sizing material comprises the following components in percentage by mass: 45wt% of isophorone, 20wt% of epoxy resin, 20wt% of methyl isobutyl ketone and 1wt% of carbon black; the isophorone and the methyl isobutyl ketone in the first sizing material are mixed to be used as a special coating diluent to dissolve epoxy resin, wherein the epoxy resin has high insulativity, excellent heat resistance and salt fog resistance, strong metal adhesion, high structural strength and good sealing property, plays a good role in protecting the surface of an inductor, and the carbon black mainly plays a role in coloring and reinforcing the epoxy resin;
the second sizing material is a commercial product, is a modified virgin rubber coating produced and sold by the Japanese LORD company, and comprises the following components in percentage by mass: 78.5wt% of ethyl acetate, 6wt% of epoxy resin, 5wt% of propylene glycol methyl ether acetate, 5wt% of n-butanol, 4.0wt% of pigment and 1.5wt% of amino resin; in the second sizing material, ethyl acetate, propylene glycol methyl ether acetate and n-butyl alcohol are used as diluting solvents of epoxy resin and amino resin, and the amino resin plays a role of an adhesive to keep color of a paint film and enhance toughness; the pigment is gray pigment which is prepared by mixing titanium pigment and carbon black, and the gray pigment mainly plays roles of coloring and reinforcing epoxy resin and is an important component for improving the characteristics of the paint;
in step S1, the homogenization pretreatment includes electric stirring and ultrasonic vibration, and the more specific process includes the following steps: s11, respectively and electrically stirring a heat-curing epoxy resin insulating paint JMC-700K (namely a first sizing material) and the modified virgin rubber coating (namely a second sizing material) for 10-60 min, wherein the stirring speed of an electric stirrer is specifically 100-300 RPM, so that the first sizing material and the second sizing material are uniform and have no precipitation or agglomeration phenomenon; s12, respectively transferring the uniformly stirred thermosetting epoxy resin insulating paint JMC-700K (namely the first sizing material) and the modified virgin rubber paint (namely the second sizing material) into a glassware, and putting the glassware into an ultrasonic oscillator to oscillate for 10-60 min, wherein the water temperature of ultrasonic oscillation is 30 ℃, so that the sizing material tiny particles are uniformly dispersed.
S2, mixing 20-60 wt% of the first sizing material and 40-80 wt% of the second sizing material with the first sizing material subjected to homogenization pretreatment in the step S1, and uniformly stirring to obtain a third sizing material;
specifically, in step S2, the stirring may be performed by using an electric stirrer, where the stirring speed is 500-600 RPM, and the stirring is performed for 10-60 min;
s3, adding a fourth sizing material and a diluent into the third sizing material, and uniformly mixing to obtain a mixture, wherein in the mixture, the mass ratio of each material is 10-40 wt% of the third sizing material, 20-60 wt% of the fourth sizing material and 20-50 wt% of the diluent, the sum of the mass ratio of the third sizing material, the fourth sizing material and the diluent is 100%, the composition components of the fourth sizing material comprise ethyl acetate, epoxy resin, propylene glycol methyl ether acetate, acetone, n-butyl alcohol and amino resin, and the composition components of the diluent comprise cyclohexanone and butanone;
specifically, in step S3, the fourth rubber material is TL-2571 rubber material manufactured by taiwan Tianlai metalizing company, and the fourth rubber material comprises the following components in percentage by mass: 80wt% of ethyl acetate, 7wt% of epoxy resin, 5wt% of propylene glycol methyl ether acetate, 3wt% of acetone, 3wt% of n-butanol and 2wt% of amino resin; in the fourth sizing material, ethyl acetate, propylene glycol methyl ether acetate, acetone and n-butyl alcohol are used as dilution solvents of epoxy resin and amino resin; the diluent is produced by the Japanese LORD company, and comprises the following components in percentage by mass: 50wt% of cyclohexanone and 50wt% of butanone, wherein the cyclohexanone and the butanone are used as main diluents to dissolve and reduce the concentration of epoxy resin and amino resin; when the fourth rubber material and the diluent are mixed, an electric stirrer is used for stirring to ensure that the fourth rubber material and the diluent are uniformly mixed, the stirring speed is 600-900RPM, and the stirring is carried out for 10-60 min.
And S4, filtering the mixture obtained in the step S3 by using a filter screen to remove large particulate matters and impurities, thereby obtaining the adhesive material which can be directly applied to the surface insulation spraying production operation of the inductor.
Specifically, in step S4, before filtering with the filter screen, the mixture may be vibrated by using ultrasonic vibration, so as to increase the dispersion effect of the glue particles and reduce the particle size; the more specific operation is that the mixture is evenly transferred to a glassware, and is put into an ultrasonic oscillator for oscillation, the temperature of the ultrasonic water is 30 ℃, and the ultrasonic oscillation time is 10-60 min; the filtering uses 120-300 meshes of filtering net, the filtering net is not allowed to be reused for a plurality of times, and each time the filtering net is used, a new filtering net is needed to be replaced for the next filtering.
If the surface insulation glue spraying material of the inductor prepared through the steps S1 to S4 is kept stand for more than 30min, ultrasonic vibration is needed for 10 to 60min when the material is used, and vibration conditions are the same as those of the steps S1 and S4.
The insulating glue spraying material for the surface of the inductor, which is prepared by the invention, is convenient to use, the thickness of the coating can reach 8-25 mu m only by spraying the inductor for 600-1800 times by using a roll spraying machine, the curing of the coating needs to be baked for 30-120 min at 160-180 ℃, and the spraying time of the existing insulating spraying material on the market needs 3.5 hours.
The insulating spraying adhesive material for the surface of the inductor has good adhesive force and spraying uniformity, so that the coating on the surface of the inductor is smooth and uniform in thickness, the thickness of the coating is easy to control, the spraying time can be shortened from 3.5 hours to 2 hours, and the production efficiency is improved; the inductor coating produced by the adhesive material has high strength, compactness and insulativity, and good wear resistance and electroplating tin climbing prevention effect; the surface coating of the inductor after spraying has good oxidation resistance and salt spray corrosion resistance, so that the inductor has excellent quality reliability, and the maximum salt spray test can be up to 48 hours.
The present invention will be further explained with reference to specific examples based on the above preparation method.
Example 1
Using a stirrer to stir the thermosetting epoxy resin insulating paint JMC-700K (namely a first sizing material) and the modified raw rubber coating (namely a second sizing material) produced by the Japanese LORD company for 30 minutes until no precipitate exists, respectively transferring the thermosetting epoxy resin insulating paint JMC-700K and the modified raw rubber coating into different glassware, and carrying out ultrasonic vibration for 20 minutes to uniformly disperse sizing material tiny particles;
37.5wt% of JMC-700K and 62.5wt% of modified raw rubber coating are measured according to the weight ratio and mixed, and the mixed gray rubber coating (namely third sizing material) is obtained by stirring for 30min by using an electric stirrer;
adding TL-2571 glue (namely a fourth glue) and a diluent into the mixed gray glue paint (namely a third glue), and mixing the mixed gray glue paint (namely the third glue), the TL-2571 glue (namely the fourth glue) and the diluent according to mass percentage when mixing, wherein the mass percentages of the mixed gray glue paint (namely the third glue) and the TL-2571 glue (namely the fourth glue) are respectively as follows: 20wt% of mixed gray glue coating (namely third glue material), 40wt% of TL-2571 glue material (namely fourth glue material), 40wt% of diluent and 100 wt% of the total mass percentage are mixed, and the device is stirred by an electric stirrer for 30min, ultrasonically oscillated for 20min and filtered by a 150-mesh filter screen, so that the required inductor surface insulation spraying glue material is obtained.
Carrying out integral forming inductor surface spraying operation on the obtained inductor surface insulation spraying adhesive material; placing the integrally formed inductor after spraying into a 180 ℃ oven for baking for 30min for curing; testing and evaluating the cured integrated inductor respectively; the inductor samples were tested for 60 ℃/95% rh moisture resistance using a steam aging oven; testing the heat resistance of the inductance sample by using the conditions of 260+/-5 ℃ and 10+/-0.5S of tin immersion; using a salt spray machine to test salt spray corrosion resistance of a sample, wherein the temperature of a laboratory is 35+/-1 ℃, the temperature of a saturated air barrel is 47+/-1 ℃, the relative humidity is 95% -98%, the concentration of a sodium chloride saline solution is 5% (the salt spray test standard is carried out according to GB 2423.17, 5% sodium chloride saline solution is adopted, and the pH value of the solution is regulated in a neutral range (6.5-7.2) to be used as a solution for spraying); placing a sample in an environment of 125+/-2 ℃ to test long-term high-temperature performance; the test results are shown in Table 1.
Example 2
Using a stirrer to stir the thermosetting epoxy resin insulating paint JMC-700K (namely a first sizing material) and the modified raw rubber coating (namely a second sizing material) produced by the Japanese LORD company for 30 minutes until no precipitate exists, respectively transferring the thermosetting epoxy resin insulating paint JMC-700K and the modified raw rubber coating into different glassware, and carrying out ultrasonic vibration for 20 minutes to uniformly disperse sizing material tiny particles;
37.5wt% of JMC-700K and 62.5wt% of modified raw rubber coating are measured according to the weight ratio and mixed, and the mixed gray rubber coating (namely third sizing material) is obtained by stirring for 30min by using an electric stirrer;
adding TL-2571 glue (namely a fourth glue) and a diluent into the mixed gray glue paint (namely a third glue), and mixing the mixed gray glue paint (namely the third glue), the TL-2571 glue (namely the fourth glue) and the diluent according to mass percentage when mixing, wherein the mass percentages of the mixed gray glue paint (namely the third glue) and the TL-2571 glue (namely the fourth glue) are respectively as follows: 16.67wt% of mixed gray glue coating (namely third glue material), 50wt% of TL-2571 glue material (namely fourth glue material) and 33.33wt% of diluent, wherein the sum of the mass percentages of the mixed gray glue coating, the TL-2571 glue material and the diluent is 100%, and the mixed gray glue coating, the TL-2571 glue material, the diluent and the diluent are stirred by an electric stirrer for 30min, ultrasonically vibrated for 20min and filtered by a 150-mesh filter screen to obtain the required inductor surface insulation spraying glue material.
Carrying out integral forming inductor surface spraying operation on the obtained inductor surface insulation spraying adhesive material; placing the integrally formed inductor after spraying into a 180 ℃ oven for baking for 30min for curing; testing and evaluating the cured integrated inductor respectively; the inductor samples were tested for 60 ℃/95% rh moisture resistance using a steam aging oven; testing the heat resistance of the inductance sample by using the conditions of 260+/-5 ℃ and 10+/-0.5S of tin immersion; using a salt spray machine to test salt spray corrosion resistance of a sample, wherein the temperature of a laboratory is 35+/-1 ℃, the temperature of a saturated air barrel is 47+/-1 ℃, the relative humidity is 95% -98%, the concentration of a sodium chloride saline solution is 5% (the salt spray test standard is carried out according to GB 2423.17, 5% sodium chloride saline solution is adopted, and the pH value of the solution is regulated in a neutral range (6.5-7.2) to be used as a solution for spraying); placing a sample in an environment of 125+/-2 ℃ to test long-term high-temperature performance; the test results are shown in Table 1.
Example 3
Using a stirrer to stir the thermosetting epoxy resin insulating paint JMC-700K (namely a first sizing material) and the modified raw rubber coating (namely a second sizing material) produced by the Japanese LORD company for 30 minutes until no precipitate exists, respectively transferring the thermosetting epoxy resin insulating paint JMC-700K and the modified raw rubber coating into different glassware, and carrying out ultrasonic vibration for 20 minutes to uniformly disperse sizing material tiny particles;
37.5wt% of JMC-700K and 62.5wt% of modified raw rubber coating are measured according to the weight ratio and mixed, and the mixed gray rubber coating (namely third sizing material) is obtained by stirring for 30min by using an electric stirrer;
adding TL-2571 glue (namely a fourth glue) and a diluent into the mixed gray glue paint (namely a third glue), and mixing the mixed gray glue paint (namely the third glue), the TL-2571 glue (namely the fourth glue) and the diluent according to mass percentage when mixing, wherein the mass percentages of the mixed gray glue paint (namely the third glue) and the TL-2571 glue (namely the fourth glue) are respectively as follows: 14.29wt% of mixed gray glue coating (namely third glue material), 57.14wt% of TL-2571 glue material (namely fourth glue material), 28.57wt% of diluent and 100 wt% of the total weight of the mixed gray glue coating, stirring for 30min by an electric stirrer, oscillating for 20min by ultrasonic waves and filtering by a 150-mesh filter screen to obtain the required inductor surface insulation spraying glue material.
Carrying out integral forming inductor surface spraying operation on the obtained inductor surface insulation spraying adhesive material; placing the integrally formed inductor after spraying into a 180 ℃ oven for baking for 30min for curing; testing and evaluating the cured integrated inductor respectively; the inductor samples were tested for 60 ℃/95% rh moisture resistance using a steam aging oven; testing the heat resistance of the inductance sample by using the conditions of 260+/-5 ℃ and 10+/-0.5S of tin immersion; using a salt spray machine to test salt spray corrosion resistance of a sample, wherein the temperature of a laboratory is 35+/-1 ℃, the temperature of a saturated air barrel is 47+/-1 ℃, the relative humidity is 95% -98%, the concentration of a sodium chloride saline solution is 5% (the salt spray test standard is carried out according to GB 2423.17, 5% sodium chloride saline solution is adopted, and the pH value of the solution is regulated in a neutral range (6.5-7.2) to be used as a solution for spraying); placing a sample in an environment of 125+/-2 ℃ to test long-term high-temperature performance; the test results are shown in Table 1.
Comparative example 1
In order to demonstrate the difference between the effect of the inductor surface insulation spray coating material provided by the invention and the effect of the inductor surface insulation spray coating material prepared by independently mixing the thermosetting epoxy resin insulation paint JMC-700K produced by Japanese LORD company with a diluent (as described in the background art), the invention has been specially tested in comparative example 1. The specific comparative example 1 test procedure is:
(1) Using a stirrer to stir the thermosetting epoxy resin insulating paint JMC-700K (namely the first sizing material) produced by the Japanese LORD company for 30min until no precipitate exists and the sizing components are uniform, the stirring conditions are the same as those of examples 1-3, and transferring the stirred thermosetting epoxy resin insulating paint JMC-700K into a glassware to perform ultrasonic vibration for 20min so as to uniformly disperse sizing material tiny particles;
(2) Adding a diluent into the thermosetting epoxy resin insulating paint JMC-700K treated in the step (1) for mixing, wherein the thermosetting epoxy resin insulating paint JMC-700K and the diluent respectively account for the following mass percent when mixing: the heat-curing epoxy resin insulating paint JMC-700K accounts for 20wt%, the diluent accounts for 80wt%, the sum of the mass percentages of the heat-curing epoxy resin insulating paint JMC-700K and the diluent is 100%, and the heat-curing epoxy resin insulating paint JMC-700K is stirred by an electric stirrer for 30min, and is subjected to ultrasonic vibration for 20min and filtering by a 150-mesh filter screen, so that the inductor surface insulating spraying glue material for comparison is obtained.
Carrying out integral forming inductor surface spraying operation on the obtained inductor surface insulation spraying adhesive material for comparison; placing the integrally formed inductor after spraying into a 180 ℃ oven for baking for 30min for curing; testing and evaluating the cured integrated inductor respectively; the inductor samples were tested for 60 ℃/95% rh moisture resistance using a steam aging oven; testing the heat resistance of the inductance sample by using the conditions of 260+/-5 ℃ and 10+/-0.5S of tin immersion; using a salt spray machine to test salt spray corrosion resistance of a sample, wherein the temperature of a laboratory is 35+/-1 ℃, the temperature of a saturated air barrel is 47+/-1 ℃, the relative humidity is 95% -98%, the concentration of a sodium chloride saline solution is 5% (the salt spray test standard is carried out according to GB 2423.17, 5% sodium chloride saline solution is adopted, and the pH value of the solution is regulated in a neutral range (6.5-7.2) to be used as a solution for spraying); placing a sample in an environment of 125+/-2 ℃ to test long-term high-temperature performance; the test results are shown in Table 1.
TABLE 1 results of reliability tests for examples 1-3 and comparative example 1
Examples Salt spray test Long-term moisture resistance Heat resistance test Long-term high temperature
Example 1 12Hour 576Hour Paint film without bubbling 504Hour
Example 2 48Hour 1200Hour Paint film without bubbling 1000Hour
Example 3 36Hour 1000Hour Paint film without bubbling 1000Hour
Comparative example 1 8Hour 360Hour Paint film bubbling 168Hour
As shown in Table 1, compared with the adhesive material obtained by mixing the epoxy resin and the diluent commonly used in the prior art, the insulating sprayed adhesive material for the surface of the inductor prepared by the method provided by the invention has obviously improved salt spray corrosion resistance, moisture resistance, heat resistance and high temperature resistance of the inductor.
The above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the above embodiments specifically illustrate the present invention, it should be understood by those skilled in the art that modifications and equivalents may be made to the specific embodiments of the present invention without departing from the spirit and scope of the present invention, and any modifications and equivalents are intended to be covered by the scope of the claims of the present invention.

Claims (10)

1. An inductor surface insulation spraying glue material which is characterized in that: the preparation raw materials of the rubber material comprise a third rubber material, a fourth rubber material and a diluent, wherein the addition amounts of the substances are as follows in percentage by mass: the third sizing material is formed by mixing 20-60 wt% of 20-50 wt% of 20-60 wt% of fourth sizing material, wherein the weight ratio of the first sizing material to the second sizing material in the third sizing material is 20-60 wt% of 40-80 wt% of the first sizing material, the first sizing material is a thermosetting epoxy resin insulating paint, the composition components of the second sizing material comprise ethyl acetate, epoxy resin, propylene glycol methyl ether acetate, n-butyl alcohol, pigment and amino resin, the composition components of the fourth sizing material comprise ethyl acetate, epoxy resin, propylene glycol methyl ether acetate, acetone, n-butyl alcohol and amino resin, and the composition components of the diluent comprise cyclohexanone and butanone.
2. The inductor surface insulation spray glue material of claim 1, wherein: the thermosetting epoxy resin insulating paint comprises the following components in percentage by mass: 45wt% of isophorone, 20wt% of epoxy resin, 20wt% of methyl isobutyl ketone and 1wt% of carbon black.
3. The inductor surface insulation spray glue material of claim 1, wherein: the second sizing material comprises the following components in percentage by mass: 78.5wt% of ethyl acetate, 6wt% of epoxy resin, 5wt% of propylene glycol methyl ether acetate, 5wt% of n-butanol, 4.0wt% of pigment and 1.5wt% of amino resin.
4. The inductor surface insulation spray glue material of claim 3, wherein: the pigment is gray pigment, and the components of the gray pigment comprise titanium white and carbon black.
5. The inductor surface insulation spray glue material of claim 1, wherein: the fourth sizing material comprises the following components in percentage by mass: 80wt% of ethyl acetate, 7wt% of epoxy resin, 5wt% of propylene glycol methyl ether acetate, 3wt% of acetone, 3wt% of n-butanol and 2wt% of amino resin.
6. The inductor surface insulation spray glue material of claim 1, wherein: the diluent comprises the following components in percentage by mass: 50wt% of cyclohexanone and 50wt% of butanone.
7. A preparation method of an inductor surface insulation spray coating material is characterized by comprising the following steps: the method comprises the following steps:
s1, respectively carrying out homogenization pretreatment on a first sizing material and a second sizing material, wherein the first sizing material is thermosetting epoxy resin insulating paint, and the composition components of the second sizing material comprise ethyl acetate, epoxy resin, propylene glycol methyl ether acetate, n-butyl alcohol, pigment and amino resin;
s2, mixing 20-60 wt% of the first sizing material and 40-80 wt% of the second sizing material with the first sizing material subjected to homogenization pretreatment in the step S1, and uniformly stirring to obtain a third sizing material;
s3, adding a fourth sizing material and a diluent into the third sizing material, and uniformly mixing to obtain a mixture, wherein the mass ratio of each material in the mixture is 10-40 wt% of the third sizing material, 20-60 wt% of the fourth sizing material and 20-50 wt% of the diluent; the fourth sizing material comprises ethyl acetate, epoxy resin, propylene glycol methyl ether acetate, acetone, n-butyl alcohol and amino resin, and the diluent comprises cyclohexanone and butanone;
and S4, filtering the mixture by using a filter screen to remove large particulate matters and impurities, thereby obtaining the adhesive material which can be directly applied to the surface insulation spraying production operation of the inductor.
8. The method for preparing the surface insulation spray coating material for the inductor according to claim 7, wherein the method comprises the following steps: in step S1, the homogenization pretreatment includes electric stirring and ultrasonic vibration.
9. The method for preparing the surface insulation spray coating material for the inductor according to claim 7, wherein the method comprises the following steps: in step S4, before the mixture is filtered by the filter screen, ultrasonic vibration treatment is also needed; the filter screen is a 120-300 mesh filter screen.
10. The method for preparing the insulating sprayed adhesive material for the surface of the inductor according to claim 8 or 9, wherein the method comprises the following steps: the time of the ultrasonic oscillation is 10-60 min, and the water temperature of the ultrasonic oscillation is 20-40 ℃.
CN202310097759.5A 2023-02-08 2023-02-08 Inductor surface insulation spray adhesive material and preparation method thereof Pending CN116254034A (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101376790A (en) * 2007-08-30 2009-03-04 比亚迪股份有限公司 Anti-corrosive paint for magnesium alloy and preparation thereof
CN111201664A (en) * 2017-09-12 2020-05-26 重庆金康新能源汽车有限公司 Temperature control device for battery pack of electric vehicle

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101376790A (en) * 2007-08-30 2009-03-04 比亚迪股份有限公司 Anti-corrosive paint for magnesium alloy and preparation thereof
CN111201664A (en) * 2017-09-12 2020-05-26 重庆金康新能源汽车有限公司 Temperature control device for battery pack of electric vehicle

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