CN112694831A - Semi-inorganic silicon steel sheet paint and preparation method and application thereof - Google Patents
Semi-inorganic silicon steel sheet paint and preparation method and application thereof Download PDFInfo
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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
- C09D179/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen, with or without oxygen, or carbon only, not provided for in groups C09D161/00 - C09D177/00
- C09D179/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C09D179/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
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- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1042—Copolyimides derived from at least two different tetracarboxylic compounds or two different diamino compounds
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- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
- C08J3/09—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in organic liquids
- C08J3/091—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in organic liquids characterised by the chemical constitution of the organic liquid
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- 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
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- 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
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- C09D7/65—Additives macromolecular
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2379/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen, or carbon only, not provided for in groups C08J2361/00 - C08J2377/00
- C08J2379/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C08J2379/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
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- C08K3/00—Use of inorganic substances as compounding ingredients
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- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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Abstract
The invention discloses a semi-inorganic silicon steel sheet paint and a preparation method and application thereof, wherein the preparation method comprises the following steps: preparing polyamide-imide clear emulsion, titanium dioxide, silicon dioxide, barium sulfate and amino resin, wherein the preparation method comprises the following steps: under the protection of protective gas and in a reflux state, enabling trimellitic anhydride and a specific compound double-end amino compound to react in a first organic solvent, adding tributyl phosphate and triethylamine, and reacting; evaporating a first organic solvent outwards, adding a second organic solvent, adding linear alkyl benzene sulfonic acid sodium salt, fatty alcohol-polyoxyethylene ether sodium sulfate and fatty alcohol-polyoxyethylene ether, mixing, dripping water under the stirring condition, and adding bismaleimide for end capping after dripping is finished to prepare the modified polyurethane; the semi-inorganic silicon steel sheet varnish is prepared by mixing and ultrasonically dispersing all components, can be applied as covering varnish in silicon steel sheets, can adopt water as a main solvent, is good in environment-friendly property, and has the advantages of high temperature resistance, high bonding strength, strong electrical property and the like.
Description
Technical Field
The invention belongs to the technical field of insulating paint, and particularly relates to semi-inorganic silicon steel sheet paint and a preparation method and application thereof.
Background
The silicon steel sheet varnish is covering varnish which plays a role in insulation protection on the surface of a silicon steel sheet. The paint for silicon steel sheet is painted to the surface of the treated and formed silicon steel sheet to reduce eddy current loss after lamination and raise antirust and anticorrosive capacity.
With the increasing demand of the country for environmental protection, the semi-inorganic silicon steel sheet paint with the properties of low VOC, little smell, convenient application and the like receives wide attention. For the paint for silicon steel sheets, the electrical property, the bonding strength and the temperature resistance index of the paint are the most core properties of the paint, and the resistance and the construction performance of the paint to various environments are very important because the paint is coated on the silicon steel sheets. However, the semi-inorganic silicon steel sheet varnish of the present invention, especially the semi-inorganic silicon steel sheet varnish capable of being stably dispersed in water, generally cannot simultaneously take into consideration the most critical properties.
Therefore, the preparation of the semi-inorganic silicon steel sheet paint which has high temperature resistance, high bonding strength, strong electrical property, good environmental resistance and construction performance and good water dispersibility is of great significance.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the improved semi-inorganic silicon steel sheet paint which not only can adopt water as a main solvent and improve the environment protection, but also has the advantages of high temperature resistance, high bonding strength, strong electrical performance and the like and has good environmental resistance and construction performance.
The invention also provides a preparation method of the semi-inorganic silicon steel sheet varnish.
The invention also provides a silicon steel sheet containing the semi-inorganic silicon steel sheet varnish.
In order to solve the technical problems, the invention adopts the following technical scheme:
the semi-inorganic silicon steel sheet paint comprises the following components: the resin emulsion is polyamide-imide clear emulsion, the inorganic filler is composed of titanium dioxide, silicon dioxide and barium sulfate, and the curing agent is amino resin;
wherein the polyamide-imide emulsion is prepared by the following method:
(1) under the protection of protective gas, under the reflux state, enabling trimellitic anhydride and a double-end amino compound to perform a first reaction in a first organic solvent to obtain a first mixed solution, adding tributyl phosphate and triethylamine into the obtained first mixed solution, and performing a second reaction to obtain a second mixed solution; the double-amino-terminal compound is composed of 4,4 '-diaminodiphenyl ether, 4' -diaminodiphenylmethane and 1, 6-diaminohexane;
(2) under the protection of protective gas, the first organic solvent contained in the second mixed solution is evaporated outwards to obtain a third mixed solution;
(3) and adding a second organic solvent into the third mixed solution, adding linear alkyl benzene sodium sulfonate, fatty alcohol-polyoxyethylene ether sodium sulfate and fatty alcohol-polyoxyethylene ether, mixing, dripping water under the stirring condition, and adding bismaleimide for end capping after dripping to obtain the polyamide-imide emulsion.
According to some preferred aspects of the present invention, in step (1), the first reaction is carried out at 140 ℃ and 170 ℃.
According to some preferred aspects of the present invention, in step (1), the molar ratio of the trimellitic anhydride to the double-terminal amino compound is charged in the range of 1: 1.02 to 1.50.
According to some preferred aspects of the present invention, in step (1), the 4,4 '-diaminodiphenyl ether, the 4, 4' -diaminodiphenylmethane and the 1, 6-diaminohexane are fed in a molar ratio of 1: 0.8-1.3: 0.3-0.9.
According to some preferred aspects of the invention, in step (1), the second reaction is carried out at 185-205 ℃.
According to some preferred aspects of the present invention, in step (1), the molar ratio of the fed triethylamine to the fed trimellitic anhydride is in the range of 0.1-0.2: 1.
According to some preferred aspects of the present invention, in the step (3), the temperature of the third mixed solution is controlled to be 60 to 80 ℃, and then the linear alkylbenzene sodium sulfonate, the fatty alcohol-polyoxyethylene ether sodium sulfate and the fatty alcohol-polyoxyethylene ether are added.
According to some preferred aspects of the invention, in step (3), the capping is performed at 15 to 35 ℃; and/or in the step (3), the feeding mass ratio of the linear alkyl benzene sodium sulfonate, the fatty alcohol-polyoxyethylene ether sodium sulfate and the fatty alcohol-polyoxyethylene ether is 2-4: 0.5-4: 1.
According to some preferred aspects of the present invention, the mass ratio of the total charge of the sodium linear alkylbenzene sulfonate, the sodium fatty alcohol-polyoxyethylene ether sulfate and the fatty alcohol-polyoxyethylene ether to the charge of the trimellitic anhydride is 0.06-0.18: 1.
According to some preferred aspects of the present invention, in step (3), the linear alkyl benzene sulfonic acid sodium salt is sodium dodecyl benzene sulfonate, the fatty alcohol-polyoxyethylene ether sodium sulfate is one or more selected from the group consisting of sodium lauryl alcohol polyoxyethylene ether sulfate, sodium tridecanol polyoxyethylene ether sulfate, sodium tetradecanol polyoxyethylene ether sulfate and sodium pentadecanol polyoxyethylene ether sulfate, and the fatty alcohol-polyoxyethylene ether is lauryl alcohol polyoxyethylene ether and/or tridecanol polyoxyethylene ether.
According to some preferred aspects of the present invention, in step (3), the charged molar ratio of the bismaleimide to the trimellitic anhydride is 0.2-0.3: 1.
According to some preferred aspects of the present invention, in the step (3), the bismaleimide is diphenylmethane bismaleimide, N' -m-phenylene bismaleimide.
According to some preferred aspects of the present invention, in step (1) or step (2), the protective gas is nitrogen and/or argon.
According to some preferred aspects of the present invention, in step (2), the evaporation is performed at 210 ℃ and 230 ℃.
According to some preferred aspects of the present invention, the first organic solvent in step (1) is dimethylacetamide and the second organic solvent in step (3) is diethylene glycol monobutyl ether.
According to some preferred aspects of the invention, the amino resin is cyanite 325 amino resin.
According to some preferred aspects of the present invention, the silica is a modified silica prepared by reacting silica with a silane coupling agent; the feeding mass ratio of the titanium dioxide, the modified silicon dioxide and the barium sulfate is 1: 0.8-1.2.
According to the invention, the three fillers are added simultaneously, so that the dispersibility of the fillers under the same addition amount is improved, and the performance of the paint is improved.
According to some preferred aspects of the invention, in the semi-inorganic silicon steel sheet paint, by mass, 600 parts of polyamideimide clear emulsion, 90-150 parts of inorganic filler, 30-50 parts of curing agent, and optionally 10-30 parts of suspension stabilizer are included, wherein the suspension stabilizer is lithium bentonite, and the solid content of the polyamideimide clear emulsion is 55-65%.
The invention also provides a technical scheme: the preparation method of the semi-inorganic silicon steel sheet varnish comprises the following steps: the semi-inorganic silicon steel sheet varnish is prepared by mixing the components and then carrying out ultrasonic dispersion.
The invention also provides a technical scheme: the utility model provides a silicon steel sheet, includes the silicon steel sheet body and covers and establish the covering paint on silicon steel sheet body surface, the covering paint include above-mentioned semi-inorganic silicon steel sheet lacquer.
According to the invention, a specific polyamide-imide emulsion is innovatively provided, in the process of preparing polyamide-imide, an activator combination (linear alkyl benzene sulfonic acid sodium salt, fatty alcohol-polyoxyethylene ether sodium sulfate and fatty alcohol-polyoxyethylene ether) is introduced, specifically, trimellitic anhydride reacts with a combined double-end amino compound, triethylamine is added to further improve the reaction degree and endow the whole with better flexibility and toughness, tributyl phosphate can further improve the toughness of the system through physical modification, all organic solvents are evaporated, a certain amount of water-soluble organic solvent is added, then a combined activator is added, mixing is carried out, water is dripped to form stable emulsion, and finally the residual active group blocked by bismaleimide is added to further ensure the stable performance of the emulsion in all aspects The imide reduces other performance problems such as electric property, adhesion and the like when having water solubility, and the organic solvent is less in use amount and more environment-friendly.
Due to the implementation of the technical scheme, compared with the prior art, the invention has the following advantages:
the semi-inorganic silicon steel sheet paint is prepared by mixing the specific polyamide-imide clear emulsion, the specific inorganic filler and the amino resin, can adopt water as a main solvent, improves the environment-friendly property, has the advantages of high temperature resistance, high bonding strength, strong electrical property and the like, and has good environmental resistance and construction performance.
Detailed Description
The present invention will be described in further detail with reference to specific examples. It is to be understood that these examples are for the purpose of illustrating the general principles, essential features and advantages of the present invention, and the present invention is not limited by the following examples. The implementation conditions used in the examples can be further adjusted according to specific requirements, and the implementation conditions not indicated are generally the conditions in routine experiments. The raw materials used in the examples are all commercially available commercial products.
In the following examples, all starting materials are essentially obtained commercially or prepared by conventional methods in the art, unless otherwise specified. Sodium linear alkyl benzene sulfonate was purchased from Lossen chemical Co., Ltd., Linyi City, trade name LAS-30; sodium fatty alcohol polyoxyethylene ether sulfate is available from commercial Limited of Hongxin of Jinen, Jinan, under the trade designation HXY-ethoxylated alkyl sodium sulfate (series); the fatty alcohol-polyoxyethylene ether is purchased from Heian petrochemical plants in Jiangsu province under the trade name AEO-3; bismaleimides are purchased from the group of Relo, trade name DDM-BMI; lithium bentonite is available from Xiangyang Baishi mountain clay GmbH, under the designation 7342080.
In the following implementation, the modified nano-silica used was prepared as follows: 10 parts of nano SiO2Adding 500 parts of N-methyl pyrrolidone, performing ultrasonic dispersion for 1h, adding 0.3 part of KH550 coupling agent, stirring for 3h at room temperature, performing suction filtration, repeatedly washing with ethanol, and drying the product at 140 ℃ for 5h to obtain the product.
Example 1
The embodiment provides a semi-inorganic silicon steel sheet paint which comprises the following components: polyamideimide emulsion, titanium dioxide (TiO)2) Modified silica (modified SiO)2) Barium sulfate (BaSO)4) Lithium bentonite and cyanot 325 amino resin.
The preparation method of the semi-inorganic silicon steel sheet varnish comprises the following steps:
(1) preparation of polyamideimide emulsion: adding 100 parts of trimellitic anhydride, 50 parts of 4,4 ' -diaminodiphenyl ether, 50 parts of 4,4 ' -diaminodiphenylmethane, 15 parts of 1,6 ' -diaminohexane and 150 parts of dimethylacetamide into a reaction vessel, and introducing N2Heating to 155 +/-2 ℃, stirring and keeping the temperature for 2.5 hours; adding 2.5 parts of tributyl phosphate and 8 parts of triethylamine, heating to 200 +/-2 ℃, and increasing N2Heating the gas quantity to 220 ℃, and completely evaporating the dimethylacetamide; descendHeating to 100 ℃, adding 20 parts of diethylene glycol monobutyl ether, cooling to 70 ℃, adding 4 parts of linear alkyl benzene sodium sulfonate, 1 part of fatty alcohol-polyoxyethylene ether sodium sulfate and 2 parts of fatty alcohol-polyoxyethylene ether as activators, accelerating the stirring speed, dripping 250 parts of water, cooling to room temperature, adding 50 parts of bismaleimide for end capping after dripping is finished, and preparing the polyamideimide emulsion;
(2) adding 40 parts of cyanamide 325 amino resin and 40 parts of TiO into the polyamide-imide emulsion prepared in the step (1)240 portions of modified SiO240 parts of BaSO4And 20 parts of lithium bentonite, mixing, and performing ultrasonic oscillation for 1 hour to prepare the semi-inorganic silicon steel sheet paint.
Example 2
The embodiment provides a semi-inorganic silicon steel sheet paint which comprises the following components: polyamideimide emulsion, titanium dioxide (TiO)2) Modified silica (modified SiO)2) Barium sulfate (BaSO)4) Lithium bentonite and cyanot 325 amino resin.
The preparation method of the semi-inorganic silicon steel sheet varnish comprises the following steps:
(1) preparation of polyamideimide emulsion: adding 100 parts of trimellitic anhydride, 50 parts of 4,4 ' -diaminodiphenyl ether, 40 parts of 4,4 ' -diaminodiphenylmethane, 12 parts of 1,6 ' -diaminohexane and 150 parts of dimethylacetamide into a reaction vessel, and introducing N2Heating to 155 +/-2 ℃, stirring and keeping the temperature for 2.5 hours; adding 2.5 parts of tributyl phosphate and 6 parts of triethylamine, heating to 200 +/-2 ℃, and increasing N2Heating the gas quantity to 220 ℃, and completely evaporating the dimethylacetamide; cooling to 100 ℃, adding 20 parts of diethylene glycol monobutyl ether, cooling to 70 ℃, adding 4 parts of linear alkyl benzene sodium sulfonate, 1 part of fatty alcohol-polyoxyethylene ether sodium sulfate and 1 part of fatty alcohol-polyoxyethylene ether as activators, accelerating the stirring speed, dripping 250 parts of water, cooling to room temperature, adding 60 parts of bismaleimide for end capping after dripping is finished, and preparing the polyamide imide emulsion;
(2) adding 40 parts of cyanamide 325 amino resin and 30 parts of TiO into the polyamide-imide emulsion prepared in the step (1)224 parts of modified SiO236 parts of BaSO420 parts of lithium bentonite, mixing and ultrasonic vibrationAnd (5) swinging for 1h to prepare the semi-inorganic silicon steel sheet paint.
Example 3
The embodiment provides a semi-inorganic silicon steel sheet paint which comprises the following components: polyamideimide emulsion, titanium dioxide (TiO)2) Modified silica (modified SiO)2) Barium sulfate (BaSO)4) Lithium bentonite and cyanot 325 amino resin.
The preparation method of the semi-inorganic silicon steel sheet varnish comprises the following steps:
(1) preparation of polyamideimide emulsion: adding 100 parts of trimellitic anhydride, 50 parts of 4,4 ' -diaminodiphenyl ether, 60 parts of 4,4 ' -diaminodiphenylmethane, 25 parts of 1,6 ' -diaminohexane and 150 parts of dimethylacetamide into a reaction vessel, and introducing N2Heating to 155 +/-2 ℃, stirring and keeping the temperature for 2.5 hours; adding 2.5 parts of tributyl phosphate and 12 parts of triethylamine, heating to 200 +/-2 ℃, and increasing N2Heating the gas quantity to 220 ℃, and completely evaporating the dimethylacetamide; cooling to 100 ℃, adding 20 parts of diethylene glycol monobutyl ether, cooling to 70 ℃, adding 8 parts of linear alkyl benzene sodium sulfonate, 8 parts of fatty alcohol-polyoxyethylene ether sodium sulfate and 2 parts of fatty alcohol-polyoxyethylene ether as activators, accelerating the stirring speed, dripping 250 parts of water, cooling to room temperature, adding 40 parts of bismaleimide end capping, and preparing the polyamide imide emulsion;
(2) adding 40 parts of cyanamide 325 amino resin and 50 parts of TiO into the polyamide-imide emulsion prepared in the step (1)260 parts of modified SiO240 parts of BaSO4And 20 parts of lithium bentonite, mixing, and performing ultrasonic oscillation for 1 hour to prepare the semi-inorganic silicon steel sheet paint.
Comparative example 1
Basically, the method is the same as the method of the embodiment 1, and the method only differs from the method in that: only 140 parts of 4,4 '-diaminodiphenyl ether equivalent to "50 parts of 4, 4' -diaminodiphenyl ether, 50 parts of 4,4 '-diaminodiphenylmethane and 15 parts of 1, 6' -diaminohexane" were added to the terminal amino compound.
Comparative example 2
Basically, the method is the same as the method of the embodiment 1, and the method only differs from the method in that: the amino-terminated compound is not added with 4,4 '-diaminodiphenyl ether, and the 4, 4' -diaminodiphenylmethane is correspondingly adjusted to 100 parts.
Comparative example 3
Basically, the method is the same as the method of the embodiment 1, and the method only differs from the method in that: no fatty alcohol polyoxyethylene ether sodium sulfate is added, and 5 parts of linear alkyl benzene sodium sulfonate is correspondingly adjusted.
Comparative example 4
Basically, the method is the same as the method of the embodiment 1, and the method only differs from the method in that: only 7 parts of sodium fatty alcohol-polyoxyethylene ether sulfate is added, and linear alkyl benzene sulfonate and fatty alcohol-polyoxyethylene ether are not added.
Performance testing
The semi-inorganic silicon steel sheet paints obtained in the above examples 1 to 3 and comparative examples 1 to 4 were cured at 120 c/1 hour, 180 c/1 hour, and 200 c/2 hour, and the following performance tests were performed, referring to table 1.
TABLE 1
The above embodiments are merely illustrative of the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the invention, and not to limit the scope of the invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the scope of the present invention.
Claims (10)
1. The semi-inorganic silicon steel sheet paint comprises the following components: the resin emulsion is polyamide-imide clear emulsion, the inorganic filler is composed of titanium dioxide, silicon dioxide and barium sulfate, and the curing agent is amino resin;
wherein the polyamide-imide emulsion is prepared by the following method:
(1) under the protection of protective gas, under the reflux state, enabling trimellitic anhydride and a double-end amino compound to perform a first reaction in a first organic solvent to obtain a first mixed solution, adding tributyl phosphate and triethylamine into the obtained first mixed solution, and performing a second reaction to obtain a second mixed solution; the double-amino-terminal compound is composed of 4,4 '-diaminodiphenyl ether, 4' -diaminodiphenylmethane and 1, 6-diaminohexane;
(2) under the protection of protective gas, the first organic solvent contained in the second mixed solution is evaporated outwards to obtain a third mixed solution;
(3) and adding a second organic solvent into the third mixed solution, adding linear alkyl benzene sodium sulfonate, fatty alcohol-polyoxyethylene ether sodium sulfate and fatty alcohol-polyoxyethylene ether, mixing, dripping water under the stirring condition, and adding bismaleimide for end capping after dripping to obtain the polyamide-imide emulsion.
2. The paint for semi-inorganic silicon steel sheets as claimed in claim 1, wherein in the step (1), the first reaction is carried out at 140-170 ℃; and/or in the step (1), the feeding molar ratio of the trimellitic anhydride to the double-end amino compound is 1: 1.02-1.50; and/or in the step (1), the feeding molar ratio of the 4,4 '-diaminodiphenyl ether, the 4, 4' -diaminodiphenylmethane and the 1, 6-diaminohexane is 1: 0.8-1.3: 0.3-0.9.
3. The paint for semi-inorganic silicon steel sheets as claimed in claim 1, wherein in the step (1), the second reaction is carried out at 185-205 ℃; and/or the presence of a gas in the gas,
in the step (1), the feeding molar ratio of the triethylamine to the trimellitic anhydride is 0.1-0.2: 1.
4. The paint for semi-inorganic silicon steel sheets as claimed in claim 1, wherein in the step (3), the temperature of the third mixed solution is controlled to be 60-80 ℃, and then the sodium linear alkyl benzene sulfonate, the sodium fatty alcohol-polyoxyethylene ether sulfate and the fatty alcohol-polyoxyethylene ether are added; and/or, in step (3), the end-capping is carried out at 15-35 ℃; and/or in the step (3), the feeding mass ratio of the linear alkyl benzene sodium sulfonate, the fatty alcohol-polyoxyethylene ether sodium sulfate and the fatty alcohol-polyoxyethylene ether is 2-4: 0.5-4: 1;
the mass ratio of the total feeding amount of the linear alkyl benzene sulfonic acid sodium salt, the fatty alcohol-polyoxyethylene ether sodium sulfate and the fatty alcohol-polyoxyethylene ether to the feeding amount of the trimellitic anhydride is 0.06-0.18: 1.
5. The paint for semi-inorganic silicon steel sheets as claimed in claim 1, wherein in step (3), the linear alkyl benzene sulfonic acid sodium is sodium dodecyl benzene sulfonate, the fatty alcohol-polyoxyethylene ether sodium sulfate is one or more selected from the group consisting of sodium lauryl alcohol polyoxyethylene ether sulfate, sodium trideceth sulfate, sodium tetradeceth sulfate and sodium pentadecyl alcohol polyoxyethylene ether sulfate, and the fatty alcohol-polyoxyethylene ether is lauryl alcohol polyoxyethylene ether and/or tridecyl alcohol polyoxyethylene ether.
6. The paint for semi-inorganic silicon steel sheets as claimed in claim 1, wherein in the step (3), the charging molar ratio of the bismaleimide to the trimellitic anhydride is 0.2-0.3: 1; and/or, in the step (3), the bismaleimide is diphenylmethane bismaleimide and/or N, N' -m-phenylene bismaleimide; and/or, in the step (1), the protective gas is nitrogen and/or argon; and/or, in the step (2), the evaporation is carried out at the temperature of 210 ℃ and 230 ℃; and/or, the first organic solvent in the step (1) is dimethylacetamide, and the second organic solvent in the step (3) is diethylene glycol monobutyl ether; and/or the amino resin is cyanogen 325 amino resin.
7. The semi-inorganic silicon steel sheet varnish according to claim 1, wherein the silica is a modified silica prepared by reacting silica with a silane coupling agent; the feeding mass ratio of the titanium dioxide, the modified silicon dioxide and the barium sulfate is 1: 0.8-1.2.
8. The semi-inorganic silicon steel sheet varnish according to claim 1, wherein the semi-inorganic silicon steel sheet varnish comprises, by mass, 500-600 parts of polyamideimide clear emulsion, 90-150 parts of inorganic filler, 30-50 parts of curing agent, and optionally 10-30 parts of suspension stabilizer, wherein the suspension stabilizer is lithium bentonite, and the solid content of the polyamideimide clear emulsion is 55-65%.
9. A method for preparing semi-inorganic silicon steel sheet varnish according to any one of claims 1 to 8, wherein the method for preparing semi-inorganic silicon steel sheet varnish comprises: the semi-inorganic silicon steel sheet varnish is prepared by mixing the components and then carrying out ultrasonic dispersion.
10. A silicon steel sheet comprising a silicon steel sheet body and a coating varnish coated on the surface of the silicon steel sheet body, wherein the coating varnish comprises the semi-inorganic silicon steel sheet varnish according to any one of claims 1 to 8.
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| CN202011528706.7A CN112694831B (en) | 2020-12-22 | 2020-12-22 | Semi-inorganic silicon steel sheet paint and preparation method and application thereof |
| CN202210229033.8A CN114605910B (en) | 2020-12-22 | 2020-12-22 | Semi-inorganic silicon steel sheet paint |
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|---|---|
| CN114605910B (en) | 2022-12-06 |
| CN112694831B (en) | 2022-04-01 |
| CN114605910A (en) | 2022-06-10 |
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