CN114032027A - Insulating coating and preparation method and application thereof - Google Patents
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- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
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Abstract
The invention relates to the technical field of insulating coatings, in particular to an insulating coating, a preparation method and application thereof, wherein the insulating coating comprises the following raw materials in parts by weight: 50-60 parts of liquid organic silicon resin, 55-65 parts of solvent, 10-20 parts of propylene glycol methyl ether acetate, 20-25 parts of compound filler, 10-16 parts of composite filler, 0.5-1 part of silane coupling agent, 0.1-0.5 part of diethylaminopropylamine, 1-1.5 parts of sodium dodecyl sulfate, 2-3 parts of flatting agent and 0.5-1 part of polydimethylsiloxane; the invention reduces the conductivity of the coating by adding the compound filler and the composite filler and adding the lead oxide, the barium oxide, the titanium dioxide and the silicon carbide, wherein the Ti4+、Ba2+The introduction of the barium oxide and the titanium dioxide can obviously improve the resistance coefficient of the coating, and the introduced two basic oxides of the barium oxide and the titanium dioxide can form a double-alkali effect and reduce the conductivity;the introduction of the talcum powder and the kaolin improves the heat resistance of the coating, the volume resistivity of the silicon carbide is high, the structure is compact, and the conductivity of the coating is further reduced after the introduction.
Description
Technical Field
The invention relates to the technical field of insulating coatings, in particular to an insulating coating and a preparation method and application thereof.
Background
The nanocrystalline soft magnetic alloy is soft magnetic alloy with a nanocrystalline structure obtained by heat treatment on the basis of amorphous alloy, and has more excellent soft magnetic performance. Therefore, the manufacturing process and the using process of the amorphous alloy material are energy-saving green energy-saving products which are mainly developed in the new century. In practical use, an insulating coating needs to be coated on the nanocrystalline soft magnetic alloy to improve the performance of the nanocrystalline soft magnetic alloy.
In the prior art, chromic anhydride and hexavalent chromium in chromate used by insulating paint cause serious harm to human body and environment. To this end, we propose an insulating coating, a method of making it and applications to solve the above problems.
Disclosure of Invention
In view of the deficiencies of the prior art, the present invention provides an insulating coating, a method for preparing the same and applications thereof, so as to overcome the problems mentioned in the background art.
In order to achieve the above purpose, the technical scheme of the invention is realized by the following technical scheme: an insulating coating comprises the following raw materials in parts by weight: 50-60 parts of liquid organic silicon resin, 55-65 parts of solvent, 10-20 parts of propylene glycol methyl ether acetate, 20-25 parts of compound filler, 10-16 parts of composite filler, 0.5-1 part of silane coupling agent, 0.1-0.5 part of diethylaminopropylamine, 1-1.5 parts of sodium dodecyl sulfate, 2-3 parts of flatting agent and 0.5-1 part of polydimethylsiloxane.
Preferably, the insulating coating comprises the following raw materials in parts by weight: 55 parts of liquid organic silicon resin, 60 parts of solvent, 15 parts of propylene glycol methyl ether acetate, 22 parts of compound filler, 12 parts of composite filler, 0.8 part of silane coupling agent, 0.3 part of diethylaminopropylamine, 1.2 parts of sodium dodecyl sulfate, 2.5 parts of flatting agent and 0.6 part of polydimethylsiloxane.
Preferably, the solvent is any one of a 60 wt% ethanol solution and a 60 wt% isopropanol solution.
Preferably, the leveling agent is any one of a phosphate-type leveling agent and an acrylate-type leveling agent.
Preferably, the compound filler comprises the following components in percentage by weight: 45-50% of lead oxide, 18-20% of barium oxide, 25-28% of titanium dioxide and the balance of silicon carbide.
Preferably, the preparation method of the compound filler is as follows, S1: weighing the raw materials in proportion, uniformly mixing, putting into a high-temperature furnace for melting, and preserving heat for 1-1.5h at 1100-; s2: taking out the molten material, quickly putting into cold water for water quenching, and filtering to obtain a quenched material; s3: and (3) putting the quenched material into a ball mill for ball milling, taking water as a ball milling medium, performing ball milling for 22-25h at the speed of 400r/min under the condition of 300-fluid sand, and filtering and drying to obtain the compound filler.
Preferably, the particle size of the compound filler is 350-450 meshes.
Preferably, the composite filler comprises talcum powder and kaolin, and the mass ratio of the talcum powder to the kaolin is 1: 1.
the invention provides a preparation method of an insulating coating, which specifically comprises the following steps:
(1) dissolving a silane coupling agent in a solvent, adding a compound filler and a composite filler, stirring for 30-40min, filtering and drying to obtain a modified compound filler and a modified composite filler;
(2) putting the liquid organic silicon resin into an electric heating stirrer, controlling the temperature to be 100 plus 120 ℃, then adding the modified compound filler, the sodium dodecyl sulfate and the polydimethylsiloxane into the electric heating stirrer, stirring for 40-50min at the rotating speed of 1500 plus 1800r/min, and then cooling to the room temperature;
(3) and adding the flatting agent, the diethylaminopropylamine and the propylene glycol methyl ether acetate into an electric stirrer, and stirring at the rotating speed of 1000-1200r/min for 20-30min to obtain the insulating coating. Preferably, the first and second liquid crystal materials are,
the invention also provides application of the insulating coating on the amorphous nanocrystalline soft magnetic alloy strip.
The invention has the beneficial effects that:
the invention reduces the conductivity of the coating by adding the compound filler and the composite filler and adding the lead oxide, the barium oxide, the titanium dioxide and the silicon carbide, wherein the Ti4+、Ba2+The introduction of the titanium dioxide can obviously improve the resistivity of the coating, and the introduced barium oxide and the titanium dioxide are bothThe basic oxide can form double-alkali effect and reduce conductivity; the introduction of the talcum powder and the kaolin improves the heat resistance of the coating, the volume resistivity of the silicon carbide is high, the structure is compact, and the conductivity of the coating is further reduced after the introduction;
according to the invention, the compatibility among the composite filler, the compound filler and the organic silicon resin matrix is improved by modifying the composite filler and the compound filler, so that the structure of the coating becomes more compact, and the improvement of the overall quality of the insulating coating is facilitated.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
An insulating coating comprises the following raw materials in parts by weight: 50 parts of liquid organic silicon resin, 55 parts of solvent, 10 parts of propylene glycol methyl ether acetate, 20 parts of compound filler, 10 parts of composite filler, 0.5 part of silane coupling agent, 0.1 part of diethylaminopropylamine, 1 part of sodium dodecyl sulfate, 2 parts of flatting agent and 0.5 part of polydimethylsiloxane.
The solvent is 60 wt% ethanol solution; the flatting agent is a phosphate type flatting agent; the composite filler comprises talcum powder and kaolin, and the mass ratio of the talcum powder to the kaolin is 1: 1.
the compound filler comprises the following components in percentage by weight: 45% of lead oxide, 20% of barium oxide, 28% of titanium dioxide and the balance of silicon carbide; the preparation method of the compound filler is as follows, S1: weighing the raw materials in proportion, uniformly mixing, putting into a high-temperature furnace for melting, and preserving heat for 1h at 1100 ℃ to obtain a melted material; s2: taking out the molten material, quickly putting into cold water for water quenching, and filtering to obtain a quenched material; s3: and (3) putting the quenched material into a ball mill for ball milling, taking water as a ball milling medium, performing ball milling for 22h at 300r/min, filtering and drying to obtain the compound filler.
The preparation method of the insulating coating comprises the following steps:
(1) dissolving a silane coupling agent in a solvent, adding a compound filler and a composite filler, stirring for 30min, filtering and drying to obtain a modified matched filler and a modified composite filler;
(2) putting the liquid organic silicon resin into an electric heating stirrer, controlling the temperature to be 100 ℃, then adding the modified compound filler, the sodium dodecyl sulfate and the polydimethylsiloxane into the electric heating stirrer, stirring for 40min at the rotating speed of 1500r/min, and then cooling to room temperature;
(3) and adding the flatting agent, the diethylaminopropylamine and the propylene glycol methyl ether acetate into an electric stirrer, and stirring at the rotating speed of 1000r/min for 20min to obtain the insulating coating.
The insulating coating is applied to the amorphous nanocrystalline magnetically soft alloy strip.
Example 2
An insulating coating comprises the following raw materials in parts by weight: 55 parts of liquid organic silicon resin, 60 parts of solvent, 15 parts of propylene glycol methyl ether acetate, 22 parts of compound filler, 12 parts of composite filler, 0.8 part of silane coupling agent, 0.3 part of diethylaminopropylamine, 1.2 parts of sodium dodecyl sulfate, 2.5 parts of flatting agent and 0.6 part of polydimethylsiloxane.
The solvent is 60 wt% isopropanol solution; the leveling agent is an acrylate leveling agent; the composite filler comprises talcum powder and kaolin, and the mass ratio of the talcum powder to the kaolin is 1: 1.
the compound filler comprises the following components in percentage by weight: 48% of lead oxide, 18% of barium oxide, 28% of titanium dioxide and the balance of silicon carbide; the preparation method of the compound filler is as follows, S1: weighing the raw materials in proportion, uniformly mixing, putting into a high-temperature furnace for melting, and preserving heat at 1100 ℃ for 1.2h to obtain a molten material; s2: taking out the molten material, quickly putting into cold water for water quenching, and filtering to obtain a quenched material; s3: and (3) putting the quenched material into a ball mill for ball milling, taking water as a ball milling medium, performing ball milling at 350r/min for 23h, filtering and drying to obtain the compound filler.
The preparation method of the insulating coating comprises the following steps:
(1) dissolving a silane coupling agent in a solvent, adding a compound filler and a composite filler, stirring for 35min, filtering and drying to obtain a modified matched filler and a modified composite filler;
(2) putting the liquid organic silicon resin into an electric heating stirrer, controlling the temperature to be 110 ℃, then adding the modified compound filler, the sodium dodecyl sulfate and the polydimethylsiloxane into the electric heating stirrer, stirring for 45min at the rotating speed of 1600r/min, and then cooling to room temperature;
(3) and adding the flatting agent, the diethylaminopropylamine and the propylene glycol methyl ether acetate into an electric stirrer, and stirring at the rotating speed of 1100r/min for 25min to obtain the insulating coating.
The insulating coating is applied to the amorphous nanocrystalline magnetically soft alloy strip.
Example 3
An insulating coating comprises the following raw materials in parts by weight: 60 parts of liquid organic silicon resin, 65 parts of solvent, 20 parts of propylene glycol methyl ether acetate, 25 parts of compound filler, 16 parts of composite filler, 1 part of silane coupling agent, 0.5 part of diethylaminopropylamine, 1.5 parts of sodium dodecyl sulfate, 3 parts of flatting agent and 1 part of polydimethylsiloxane.
The solvent is 60 wt% isopropanol solution; the leveling agent is an acrylate leveling agent; the composite filler comprises talcum powder and kaolin, and the mass ratio of the talcum powder to the kaolin is 1: 1.
the compound filler comprises the following components in percentage by weight: 50% of lead oxide, 20% of barium oxide, 25% of titanium dioxide and the balance of silicon carbide; the preparation method of the compound filler is as follows, S1: weighing the raw materials in proportion, uniformly mixing, putting into a high-temperature furnace for melting, and preserving heat at 1200 ℃ for 1.5 hours to obtain a molten material; s2: taking out the molten material, quickly putting into cold water for water quenching, and filtering to obtain a quenched material; s3: and (3) putting the quenched material into a ball mill for ball milling, taking water as a ball milling medium, performing ball milling for 25 hours at the speed of 400r/min, and filtering and drying to obtain the compound filler.
The preparation method of the insulating coating comprises the following steps:
(1) dissolving a silane coupling agent in a solvent, adding a compound filler and a composite filler, stirring for 40min, filtering and drying to obtain a modified matched filler and a modified composite filler;
(2) putting the liquid organic silicon resin into an electric heating stirrer, controlling the temperature to be 120 ℃, then adding the modified compound filler, the sodium dodecyl sulfate and the polydimethylsiloxane into the electric heating stirrer, stirring for 50min at the rotating speed of 1800r/min, and then cooling to room temperature;
(3) and adding the flatting agent, the diethylaminopropylamine and the propylene glycol methyl ether acetate into an electric stirrer, and stirring at the rotating speed of 1200r/min for 30min to obtain the insulating coating.
The insulating coating is applied to the amorphous nanocrystalline magnetically soft alloy strip.
Example 4
An insulating coating comprises the following raw materials in parts by weight: 60 parts of liquid organic silicon resin, 55 parts of solvent, 18 parts of propylene glycol methyl ether acetate, 24 parts of compound filler, 12 parts of composite filler, 0.6 part of silane coupling agent, 0.3 part of diethylaminopropylamine, 1.2 parts of sodium dodecyl sulfate, 2.5 parts of flatting agent and 1 part of polydimethylsiloxane.
The solvent is 60 wt% isopropanol solution; the leveling agent is an acrylate leveling agent; the composite filler comprises talcum powder and kaolin, and the mass ratio of the talcum powder to the kaolin is 1: 1.
the compound filler comprises the following components in percentage by weight: 48% of lead oxide, 18% of barium oxide, 28% of titanium dioxide and the balance of silicon carbide; the preparation method of the compound filler is as follows, S1: weighing the raw materials in proportion, uniformly mixing, putting into a high-temperature furnace for melting, and preserving heat at 1100 ℃ for 1.2h to obtain a molten material; s2: taking out the molten material, quickly putting into cold water for water quenching, and filtering to obtain a quenched material; s3: and (3) putting the quenched material into a ball mill for ball milling, taking water as a ball milling medium, performing ball milling at 350r/min for 23h, filtering and drying to obtain the compound filler.
The preparation method of the insulating coating comprises the following steps:
(1) dissolving a silane coupling agent in a solvent, adding a compound filler and a composite filler, stirring for 35min, filtering and drying to obtain a modified matched filler and a modified composite filler;
(2) putting the liquid organic silicon resin into an electric heating stirrer, controlling the temperature to be 110 ℃, then adding the modified compound filler, the sodium dodecyl sulfate and the polydimethylsiloxane into the electric heating stirrer, stirring for 45min at the rotating speed of 1600r/min, and then cooling to room temperature;
(3) and adding the flatting agent, the diethylaminopropylamine and the propylene glycol methyl ether acetate into an electric stirrer, and stirring at the rotating speed of 1100r/min for 25min to obtain the insulating coating.
The insulating coating is applied to the amorphous nanocrystalline magnetically soft alloy strip.
Example 5
An insulating coating comprises the following raw materials in parts by weight: 58 parts of liquid organic silicon resin, 55 parts of solvent, 12 parts of propylene glycol methyl ether acetate, 20 parts of compound filler, 14 parts of composite filler, 1 part of silane coupling agent, 0.3 part of diethylaminopropylamine, 1.2 parts of sodium dodecyl sulfate, 2.5 parts of flatting agent and 0.8 part of polydimethylsiloxane.
The solvent is 60 wt% isopropanol solution; the leveling agent is an acrylate leveling agent; the composite filler comprises talcum powder and kaolin, and the mass ratio of the talcum powder to the kaolin is 1: 1.
the compound filler comprises the following components in percentage by weight: 45% of lead oxide, 19% of barium oxide, 28% of titanium dioxide and the balance of silicon carbide; the preparation method of the compound filler is as follows, S1: weighing the raw materials in proportion, uniformly mixing, putting into a high-temperature furnace for melting, and preserving heat at 1100 ℃ for 1.2h to obtain a molten material; s2: taking out the molten material, quickly putting into cold water for water quenching, and filtering to obtain a quenched material; s3: and (3) putting the quenched material into a ball mill for ball milling, taking water as a ball milling medium, performing ball milling for 24 hours at the speed of 400r/min, and filtering and drying to obtain the compound filler.
The preparation method of the insulating coating comprises the following steps:
(1) dissolving a silane coupling agent in a solvent, adding a compound filler and a composite filler, stirring for 35min, filtering and drying to obtain a modified matched filler and a modified composite filler;
(2) putting the liquid organic silicon resin into an electric heating stirrer, controlling the temperature to be 110 ℃, then adding the modified compound filler, the sodium dodecyl sulfate and the polydimethylsiloxane into the electric heating stirrer, stirring for 45min at the rotating speed of 1600r/min, and then cooling to room temperature;
(3) and adding the flatting agent, the diethylaminopropylamine and the propylene glycol methyl ether acetate into an electric stirrer, and stirring at the rotating speed of 1200r/min for 28min to obtain the insulating coating.
The insulating coating is applied to the amorphous nanocrystalline magnetically soft alloy strip.
Performance detection
The test method comprises the following steps: the insulating coatings in examples 1-5 were tested for insulating properties according to the national standard GB/T1981-89, for salt spray resistance according to GB/T1771-08 and for adhesion according to GB/T1720-79, respectively. Specific detection results are shown in table 1.
TABLE 1 Performance test
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The insulating coating is characterized by comprising the following raw materials in parts by weight: 50-60 parts of liquid organic silicon resin, 55-65 parts of solvent, 10-20 parts of propylene glycol methyl ether acetate, 20-25 parts of compound filler, 10-16 parts of composite filler, 0.5-1 part of silane coupling agent, 0.1-0.5 part of diethylaminopropylamine, 1-1.5 parts of sodium dodecyl sulfate, 2-3 parts of flatting agent and 0.5-1 part of polydimethylsiloxane.
2. The insulating coating according to claim 1, wherein the insulating coating comprises the following raw materials in parts by weight: 55 parts of liquid organic silicon resin, 60 parts of solvent, 15 parts of propylene glycol methyl ether acetate, 22 parts of compound filler, 12 parts of composite filler, 0.8 part of silane coupling agent, 0.3 part of diethylaminopropylamine, 1.2 parts of sodium dodecyl sulfate, 2.5 parts of flatting agent and 0.6 part of polydimethylsiloxane.
3. An insulating coating according to claim 1, wherein said solvent is any one of a 60 wt% ethanol solution and a 60 wt% isopropanol solution.
4. The insulating coating according to claim 1, wherein the leveling agent is any one of a phosphate-type leveling agent and an acrylate-type leveling agent.
5. The insulating coating according to claim 1, wherein the compound filler comprises the following components in percentage by weight: 45-50% of lead oxide, 18-20% of barium oxide, 25-28% of titanium dioxide and the balance of silicon carbide.
6. An insulating coating according to claim 5, characterised in that the built-up filler is prepared by a process,
s1: weighing the raw materials in proportion, uniformly mixing, putting into a high-temperature furnace for melting, and preserving heat for 1-1.5h at 1100-;
s2: taking out the molten material, quickly putting into cold water for water quenching, and filtering to obtain a quenched material;
s3: and (3) putting the quenched material into a ball mill for ball milling, taking water as a ball milling medium, performing ball milling for 22-25h at the speed of 400r/min under the condition of 300-fluid sand, and filtering and drying to obtain the compound filler.
7. The insulating coating according to claim 6, wherein the particle size of the composite filler is 350-450 mesh.
8. An insulating coating according to claim 1, wherein the composite filler comprises talc and kaolin in a mass ratio of 1: 1.
9. the method for preparing an insulating coating according to any one of claims 1 to 8, characterized in that it comprises in particular the following steps:
(1) dissolving a silane coupling agent in a solvent, adding a compound filler and a composite filler, stirring for 30-40min, filtering and drying to obtain a modified compound filler and a modified composite filler;
(2) putting the liquid organic silicon resin into an electric heating stirrer, controlling the temperature to be 100 plus 120 ℃, then adding the modified compound filler, the sodium dodecyl sulfate and the polydimethylsiloxane into the electric heating stirrer, stirring for 40-50min at the rotating speed of 1500 plus 1800r/min, and then cooling to the room temperature;
(3) and adding the flatting agent, the diethylaminopropylamine and the propylene glycol methyl ether acetate into an electric stirrer, and stirring at the rotating speed of 1000-1200r/min for 20-30min to obtain the insulating coating.
10. Use of an insulating coating prepared by the method of preparation of an insulating coating according to claim 9 on amorphous nanocrystalline soft magnetic alloy strip.
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