CN116042056A - High-solid environment-friendly and safe transformer pouring paint and preparation method thereof - Google Patents
High-solid environment-friendly and safe transformer pouring paint and preparation method thereof Download PDFInfo
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- CN116042056A CN116042056A CN202211252763.6A CN202211252763A CN116042056A CN 116042056 A CN116042056 A CN 116042056A CN 202211252763 A CN202211252763 A CN 202211252763A CN 116042056 A CN116042056 A CN 116042056A
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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
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/20—Diluents or solvents
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/23—Corrosion protection
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
Abstract
The invention relates to the technical field of paint, in particular to the field of IPC C09D127, and more particularly relates to high-solid environment-friendly and safe type transformer pouring paint and a preparation method thereof. The high-solid environment-friendly safe transformer pouring paint at least comprises the following raw materials in parts by weight: 35-60 parts of solvent-free epoxy resin, 5-15 parts of flame retardant, 0.5-1 part of solvent-free defoamer, 0.1-0.5 part of solvent-free wetting dispersant, 0.5-1 part of anti-settling thixotropic agent, 0.5-1 part of solvent-free flatting agent, 2-4 parts of sealing cross-linking agent, 2-3 parts of accelerator, 5-10 parts of epoxy reactive diluent, 10-15 parts of cosolvent and 10-20 parts of filler. The raw materials all adopt solvent-free raw materials in this application, and the pouring paint that obtains of preparation is environmental protection not only, and VOC content is high, and is nonflammable explosive, and pour paint solid content is high, and viscosity is low, and solidification rate is fast, and the desiccation is good, and the construction of being convenient for has solved the water paint desiccation that is applied to the transformer among the prior art poor, voltage-resistant problem.
Description
Technical Field
The invention relates to the technical field of paint, in particular to the field of IPC C09D127, and more particularly relates to high-solid environment-friendly and safe type transformer pouring paint and a preparation method thereof.
Background
With the rapid development of social economy, environmental protection and safety problems are increasingly concerned, and the demands for developing environment-friendly and safety coatings are increasingly increasing. The high-solid paint and the water paint have the defects of poor workability, poor drying property, lower flash point and the like due to high viscosity. The paint for the transformer has higher requirements, not only has better construction property and adhesive force, but also needs certain waterproof and voltage-resistant capacity, so that the occurrence of electric accidents can be avoided, the traditional oily paint is inflammable, explosive and high in VOC content, and has low safety and environmental protection, so that the paint cannot be applied to the transformer.
Patent document with application number of CN202010753241.9 discloses a transformer moisture-proof paint, which has strong hydrophobicity, but has no obvious improvement on voltage resistance and salt spray resistance stability.
Patent document with application number of CN201911409012.9 discloses a special graphene anticorrosive paint for transformer shells and a preparation method thereof, and the graphene is subjected to soaking dispersion treatment, so that the prepared paint has good adhesive force, excellent corrosion resistance and higher mechanical strength, but the water resistance and curing efficiency of the paint are not obviously improved.
Disclosure of Invention
In order to solve the problems, the first aspect of the invention provides high-solid environment-friendly and safe transformer pouring paint, which at least comprises the following raw materials in parts by weight: 35-60 parts of solvent-free epoxy resin, 5-15 parts of flame retardant, 0.5-1 part of solvent-free defoamer, 0.1-0.5 part of solvent-free wetting dispersant, 0.5-1 part of anti-settling thixotropic agent, 0.5-1 part of solvent-free flatting agent, 2-4 parts of sealing cross-linking agent, 2-3 parts of accelerator, 5-10 parts of epoxy reactive diluent, 10-15 parts of cosolvent and 10-20 parts of filler.
Preferably, the solvent-free epoxy resin comprises one or more of solvent-free cycloaliphatic epoxy resin, solvent-free bisphenol F type epoxy resin, solvent-free bisphenol A type epoxy resin and solvent-free polyphenol type epoxy resin; further preferred are solvent-free cycloaliphatic epoxy resins and solvent-free bisphenol F type epoxy resins.
Preferably, the weight ratio of the solvent-free cycloaliphatic epoxy resin to the solvent-free bisphenol F type epoxy resin is 1: (3-10).
Preferably, the solvent-free cycloaliphatic epoxy resin has a viscosity of 400-1500cps at 25 ℃ and an epoxy equivalent of 140-180g/eq; further preferably, the solvent-free cycloaliphatic epoxy resin has a viscosity of 500 to 1000cps at 25 ℃ and an epoxy equivalent of 150 to 180g/eq.
In some preferred embodiments, the solventless cycloaliphatic epoxy resin is purchased from multifunctional epoxy resin S-184, manufactured by Nannon New Narcissus New materials Co.
Preferably, the viscosity of the solvent-free polyphenol type epoxy resin is 1500-3000cps at 25 ℃, and the epoxy equivalent is 150-250g/eq; further preferably, the solvent-free polyphenol type epoxy resin has a viscosity of 1500-2100cps at 25 ℃ and an epoxy equivalent of 189-200g/eq.
In some preferred embodiments, the solventless polyphenol type epoxy resin is purchased from epoxy EPlKOTE 816, manufactured by Van.
The applicant creatively found that specific solvent-free cycloaliphatic epoxy resin and solvent-free bisphenol F type epoxy resin are selected and used, and when the weight ratio of the solvent-free cycloaliphatic epoxy resin to the solvent-free bisphenol F type epoxy resin is 1: and (3-10), the two solvent-free epoxy resins can cooperate with each other to adjust the viscosity of the casting paint, so that the wettability between the casting paint and the substrate can be improved under the promotion effect of the solvent-free wetting dispersant, and the adhesive force and the workability of the casting paint are improved.
In some preferred embodiments, the flame retardant is 1807.
Preferably, the solvent-free defoamer comprises one or more of solvent-free organosilicon defoamer, solvent-free mineral oil defoamer, solvent-free polyether defoamer and solvent-free powder defoamer; further preferred are solvent-free silicone defoamers.
In some preferred embodiments, the solvent-free silicone defoamer is purchased from SN-6368A gas-silicon modified silicone defoamer, manufactured by Shanghai deep bamboo chemical engineering, inc.
In some preferred embodiments, the solvent-free wetting dispersant is purchased from DS-1200, manufactured by Henan substrate wetting Inc.
Preferably, the anti-settling thixotropic agent has a density of 1.0-1.2g/cm 3 The nonvolatile matter is 45-55wt%; further preferably, the anti-settling thixotropic agent has a density of 1.05 to 1.15g/cm 3 The nonvolatile matter was 50wt%.
In some preferred embodiments, the anti-settling thixotropic agent is purchased from ANJEKA4420 aqueous polyurea thixotropic agent manufactured by angeka technologies, inc.
Preferably, the solvent-free leveling agent comprises one or more of solvent-free polyether modified organosilicon leveling agent, solvent-free acrylic ester leveling agent, solvent-free polyester modified organosilicon leveling agent and solvent-free organic modified polysiloxane acrylic acid leveling agent; further preferred is a solvent-free polyether modified silicone leveling agent.
In some preferred embodiments, the solvent-free polyether modified silicone leveling agent is purchased from SN-4384, manufactured by Shanghai deep bamboo chemical technology, inc.
In some preferred embodiments, the blocking crosslinker is purchased from 1006, manufactured by Nanjing Chensing New Material Co., ltd.
In some preferred embodiments, the accelerator is purchased from 3010-110, manufactured by Nanjing Chensing New Material Co., ltd.
Preferably, the weight ratio of the accelerator to the blocking cross-linking agent is 1: (1-2).
The applicant creatively found that a specific sealing cross-linking agent and an accelerator are selected, and the weight ratio of the accelerator to the sealing cross-linking agent is 1: and (1-2), the two raw materials can cooperate with each other, so that the water resistance, salt spray resistance and voltage resistance of the casting paint can be improved while the casting paint is quickly solidified, and the prepared casting paint can be applied to a transformer, and the safety and the practicability of the transformer are improved.
Preferably, the epoxy reactive diluent comprises one or more of para-tertiary butyl glycidyl ester, decyl glycidyl ether, methoxy polyethylene glycol glycidyl ether, C12-C13 alkyl glycidyl ether and C8-C10 alkyl glycidyl ether; further preferred is p-tert-butyl glycidyl ether.
Preferably, the epoxy value of the p-tert-butyl glycidyl ether is 0.2-0.5eq/100g, and the viscosity at 25 ℃ is 10-50 mPa.s; further preferably, the epoxy value of the p-tert-butyl glycidyl ether is 0.4 to 0.45eq/100g and the viscosity at 25 ℃ is 15 to 35 mPa.s.
In some preferred embodiments, the p-tert-butyl glycidyl ether is purchased from Anhui New distal technologies Inc. as monofunctional reactive diluent 693.
Preferably, the cosolvent comprises one or more of propylene glycol methyl ether, ethanol, n-butanol, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, methyl ethyl ketone, ethyl acetate, ethylene glycol diethyl ether acetate, toluene and xylene; further preferred is propylene glycol methyl ether.
Preferably, the filler comprises one or more of silica, bentonite, attapulgite, kaolin, calcium carbonate and barium sulfate; further preferred is silica.
Preferably, the specific surface area of the silica is 180-220m 2 /g, particle size of 10-15nm; further preferably, the specific surface area of the silica is 200m 2 And/g, particle size of 12nm.
In some preferred embodiments, the silica is purchased from AEROSIL 200, manufactured by win company.
The second aspect of the invention provides a preparation method of the high-solid environment-friendly safe transformer pouring paint, which at least comprises the following steps:
s1, adding solvent-free alicyclic epoxy resin, solvent-free bisphenol F type epoxy resin, defoamer, wetting dispersant and cosolvent into a paint preparation tank according to the weight ratio of the components, mixing, and stirring for 15-30min;
s2, adding an anti-settling thixotropic agent, and stirring for 15-20min;
s3, adding a flame retardant and a filler, and stirring for 30-40min;
s4, adding a sealing cross-linking agent, a leveling agent and an accelerator, and stirring for 15-20min;
s5, adding an epoxy reactive diluent, stirring for 10-15min, and filtering to obtain the high-solid environment-friendly and safe transformer pouring paint.
Preferably, the stirring speed in the step S1 is 300-500r/min; the stirring speed in the step S2 is 600-800r/min; the stirring speed in the step S3 is 1000-1500r/min; the stirring speed in the step S4 is 300-500r/min; the stirring speed in the step S5 is 600-800r/min.
The third aspect of the invention provides application of the high-solid environment-friendly safe transformer pouring paint, which is applied to the field of small transformers.
The beneficial effects are that:
1. the invention selects specific solvent-free cycloaliphatic epoxy resin and solvent-free bisphenol F type epoxy resin, and when the weight ratio of the solvent-free cycloaliphatic epoxy resin to the solvent-free bisphenol F type epoxy resin is 1: and (3-10), the wettability between the prepared pouring paint and the substrate can be improved, and the adhesive force and the workability of the pouring paint are further improved.
2. The invention passes through a specific sealing crosslinking agent and an accelerator, and the weight ratio of the accelerator to the sealing crosslinking agent is 1: and (1-2), the water resistance, salt spray resistance and voltage resistance of the casting paint can be improved while the casting paint is quickly cured.
3. The solvent-free raw materials are adopted as the raw materials in the application, the prepared pouring paint is environment-friendly, high in VOC content, not inflammable and explosive, high in solid content, low in viscosity, high in curing speed and good in drying property, and is convenient to construct, and the problems of poor drying property and voltage difference resistance of the water-based paint applied to the transformer in the prior art are solved, so that the prepared pouring paint is very suitable for the field of small-sized transformers.
Detailed Description
Examples
Example 1
The embodiment 1 provides high-solid environment-friendly and safe transformer pouring paint, which comprises the following raw materials in parts by weight: 48 parts of solvent-free epoxy resin, 10 parts of flame retardant, 1 part of solvent-free defoamer, 0.5 part of solvent-free wetting dispersant, 1 part of anti-settling thixotropic agent, 1 part of solvent-free leveling agent, 3.8 parts of sealing cross-linking agent, 2.4 parts of accelerator, 7 parts of epoxy reactive diluent, 15 parts of cosolvent and 15 parts of filler.
The solvent-free epoxy resin is solvent-free alicyclic epoxy resin and solvent-free bisphenol F type epoxy resin.
The weight ratio of the solvent-free alicyclic epoxy resin to the solvent-free bisphenol F type epoxy resin is 1:5.
the solvent-free alicyclic epoxy resin has a viscosity of 500-1000cps at 25 ℃ and an epoxy equivalent of 150-180g/eq.
The solvent-free cycloaliphatic epoxy resin was purchased from multifunctional epoxy resin S-184 manufactured by Nannong New Nannoch New materials Co.
The viscosity of the solvent-free polyphenol type epoxy resin is 1500-2100cps at 25 ℃, and the epoxy equivalent is 189-200g/eq.
The solventless polyphenol type epoxy resin was purchased from epoxy resin EPlKOTE 816, manufactured by hansen company, usa.
The flame retardant is 1807.
The solvent-free defoamer is a solvent-free organosilicon defoamer.
The solvent-free organic silicon defoamer is purchased from SN-6368A gas-silicon modified organic silicon defoamer produced by Shanghai deep bamboo chemical engineering Co.
The solvent-free wetting dispersant was purchased from DS-1200, manufactured by Henan substrate wetting Co., ltd.
The density of the anti-settling thixotropic agent is 1.05-1.15g/cm 3 The nonvolatile matter was 50wt%.
The anti-settling thixotropic agent is purchased from ANJEFA 4420 aqueous polyurea thixotropic agent manufactured by AnJikang technologies Inc. of Hubei.
The solvent-free leveling agent is a solvent-free polyether modified organosilicon leveling agent.
The solvent-free polyether modified organosilicon leveling agent is purchased from SN-4384 produced by Shanghai deep bamboo chemical engineering Co.
The blocking cross-linker was purchased 1006 from sandisk new materials, inc.
The accelerator was purchased from 3010-110, manufactured by Nanjing Chengjing New Material Co.
The epoxy reactive diluent is p-tert-butyl glycidyl ether.
The epoxy value of the p-tert-butyl glycidyl ether is 0.4-0.45eq/100g, and the viscosity of the p-tert-butyl glycidyl ether at 25 ℃ is 15-35 mPa.s.
The p-tert-butyl glycidyl ether was purchased from mono functional reactive diluent 693 manufactured by Anhui New technology Co., ltd.
The cosolvent is propylene glycol methyl ether.
The filler is silicon dioxide.
The specific surface area of the silicon dioxide is 200m 2 And/g, particle size of 12nm.
The silica is purchased from AEROSIL 200, manufactured by win company.
The second aspect of the invention provides a preparation method of the high-solid environment-friendly safe transformer pouring paint, which at least comprises the following steps:
s1, adding solvent-free alicyclic epoxy resin, solvent-free bisphenol F type epoxy resin, a defoaming agent, a wetting dispersant and a cosolvent into a paint preparation tank according to the weight ratio of the components, mixing, and stirring for 15min;
s2, adding an anti-settling thixotropic agent, and stirring for 15min;
s3, adding a flame retardant and a filler, and stirring for 30min;
s4, adding a sealing cross-linking agent, a leveling agent and an accelerator, and stirring for 15min;
s5, adding an epoxy reactive diluent, stirring for 10min, and filtering to obtain the high-solid environment-friendly and safe transformer pouring paint.
The stirring speed in the step S1 is 300r/min; the stirring speed in the step S2 is 600r/min; the stirring speed in the step S3 is 1000r/min; the stirring speed in the step S4 is 500r/min; the stirring speed in the step S5 is 600r/min.
Example 2
Example 2 provides a high-solid environment-friendly and safe transformer pouring paint, and a specific implementation mode is the same as example 1. The difference is that: the high-solid environment-friendly and safe transformer casting paint is prepared from the following raw materials in parts by weight; the high-solid environment-friendly safe transformer pouring paint comprises the following raw materials in parts by weight: 40 parts of solvent-free epoxy resin, 6 parts of flame retardant, 0.6 part of solvent-free defoamer, 0.2 part of solvent-free wetting dispersant, 0.6 part of anti-settling thixotropic agent, 0.6 part of solvent-free leveling agent, 2 parts of sealing cross-linking agent, 2 parts of accelerator, 6 parts of epoxy reactive diluent, 10 parts of cosolvent and 20 parts of filler.
The weight ratio of the solvent-free alicyclic epoxy resin to the solvent-free bisphenol F type epoxy resin is 1:3.
example 3
Example 3 provides a high-solid environment-friendly and safe transformer pouring paint, and a specific implementation mode is the same as example 1. The difference is that: the high-solid environment-friendly and safe transformer casting paint is prepared from the following raw materials in parts by weight; the high-solid environment-friendly safe transformer pouring paint comprises the following raw materials in parts by weight: 44 parts of solvent-free epoxy resin, 8 parts of flame retardant, 0.8 part of solvent-free defoamer, 0.3 part of solvent-free wetting dispersant, 0.8 part of anti-settling thixotropic agent, 0.8 part of solvent-free leveling agent, 2.6 parts of sealing cross-linking agent, 2.2 parts of accelerator, 7 parts of epoxy reactive diluent, 12 parts of cosolvent and 18 parts of filler.
The weight ratio of the solvent-free alicyclic epoxy resin to the solvent-free bisphenol F type epoxy resin is 9:35.
example 4
Example 4 provides a high-solid environment-friendly and safe transformer pouring paint, and a specific implementation mode is the same as example 1. The difference is that: the high-solid environment-friendly and safe transformer casting paint is prepared from the following raw materials in parts by weight; the high-solid environment-friendly safe transformer pouring paint comprises the following raw materials in parts by weight: 44 parts of solvent-free epoxy resin, 8 parts of flame retardant, 0.8 part of solvent-free defoamer, 0.3 part of solvent-free wetting dispersant, 0.8 part of anti-settling thixotropic agent, 0.8 part of solvent-free leveling agent, 2.6 parts of sealing cross-linking agent, 2.2 parts of accelerator, 7 parts of epoxy reactive diluent, 12 parts of cosolvent and 18 parts of filler.
The weight ratio of the solvent-free alicyclic epoxy resin to the solvent-free bisphenol F type epoxy resin is 7:45.
example 5
Example 5 provides a high-solid environment-friendly and safe transformer pouring paint, and a specific implementation mode is the same as example 1. The difference is that: the high-solid environment-friendly and safe transformer casting paint is prepared from the following raw materials in parts by weight; the high-solid environment-friendly safe transformer pouring paint comprises the following raw materials in parts by weight: 56 parts of solvent-free epoxy resin, 15 parts of flame retardant, 1 part of solvent-free defoamer, 0.5 part of solvent-free wetting dispersant, 1 part of anti-settling thixotropic agent, 1 part of solvent-free leveling agent, 4.5 parts of sealing cross-linking agent, 2.8 parts of accelerator, 8.5 parts of epoxy reactive diluent, 15 parts of cosolvent and 10 parts of filler.
The weight ratio of the solvent-free alicyclic epoxy resin to the solvent-free bisphenol F type epoxy resin is 3:25.
performance testing
1. Painting appearance
The casting paints prepared in examples 1 to 5 were observed for the smear appearance with reference to GB9761, and the results are reported in Table 1.
2. Viscosity of the mixture
The viscosity of the casting paints prepared in examples 1 to 5 was measured using a salt pan No. two cup, and the results are reported in Table 1.
3. Adhesion force
The adhesion rating of the casting paints prepared in examples 1 to 5 was measured using GB/T9286 and the results are reported in Table 1.
4. Stone chip resistance
The casting paints prepared in examples 1 to 5 were measured for their stone chip resistance by the Q/CAM-64.3-2011A method, and the results are reported in Table 1.
5. Flexibility of the product
For the casting paints prepared in examples 1 to 5, the flexibility was measured using GB/T1731 and the results are reported in Table 1.
6. Hardness of
The casting paints prepared in examples 1 to 5 were measured for hardness using GB/T6739, and the results are reported in Table 1.
7. Water resistance
For the casting paints prepared in examples 1 to 5, GB/T1733 was used, which was taken out after being immersed in water for 7 days, and whether the appearance of the paint film was changed or not was observed, and the results are recorded in Table 1.
8. Salt spray resistance
For the casting paints prepared in examples 1 to 5, the salt spray resistance of the paint film was measured by using a GB/T1771 method, and after 24 hours, the paint film was still intact, and the test was recorded as passing the salt spray resistance test, and the results are recorded in Table 1.
9. Voltage withstand performance
For the casting paints prepared in examples 1 to 5, the change of the appearance of the paint film under voltage was measured by a voltage-resistant instrument, and if the paint film was still intact after the application of 2kV voltage, the paint film was recorded as passing the voltage-resistant performance test, and the results are recorded in Table 1.
10. Saturation rate
For the casting paints prepared in examples 1 to 5, casting paints were cast on the workpieces, the workpieces were penetrated along the gaps, the workpieces were removed after the workpieces were cooled, whether the workpieces were coated or not was observed, the penetration rate of the paint film was the number of coated workpieces/total number of workpieces, and the penetration rate was > 90%, and the results were recorded in table 1.
11. Drying property
The drying of the casting paints prepared in examples 1 to 5 was observed after the casting paints were left at 160℃for 2 hours, and the results are reported in Table 1.
TABLE 1
| Test item | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 |
| Appearance of the coating film | Smooth and flat | Slightly particulate | Slightly particulate | Slightly textured | Slightly textured |
| Viscosity (salt pan No. 2 cup), S | 19 | 65 | 80 | 35 | 45 |
| Adhesion (frame method), grade | 0 | 0 | 0 | 0 | 0 |
| Stone impact resistance, level | 5 | 5 | 5 | 4 | 3 |
| Flexibility, mm | 5 | 5 | 5 | 5 | 5 |
| Hardness of | 2H | 2H | 2H | 2H | 2H |
| Water resistance, (soaking in Water 7 d) | No change | No change | No change | No change | No change |
| Salt spray resistance (24 h) | By passing through | By passing through | By passing through | By passing through | By passing through |
| Withstand voltage performance (> 2 kv) | By passing through | By passing through | By passing through | By passing through | By passing through |
| Permeability (> 90%) | Qualified product | Failure to pass | Failure to pass | Qualified product | Failure to pass |
| Drying (160 ℃,2 h) | Completely dry | Partial drying | Partial drying | Completely dry | Completely dry |
Claims (10)
1. The high-solid environment-friendly and safe transformer pouring paint is characterized by at least comprising the following raw materials in parts by weight: 35-60 parts of solvent-free epoxy resin, 5-15 parts of flame retardant, 0.5-1 part of solvent-free defoamer, 0.1-0.5 part of solvent-free wetting dispersant, 0.5-1 part of anti-settling thixotropic agent, 0.5-1 part of solvent-free flatting agent, 2-4 parts of sealing cross-linking agent, 2-3 parts of accelerator, 5-10 parts of epoxy reactive diluent, 10-15 parts of cosolvent and 10-20 parts of filler.
2. The high solids environmentally friendly, safe converter casting paint of claim 1 wherein said solventless epoxy resin comprises one or more of solventless cycloaliphatic epoxy resin, solventless bisphenol F epoxy resin, solventless bisphenol a epoxy resin, solventless polyphenol epoxy resin.
3. The high solids environmentally friendly, safe converter casting paint of claim 2, wherein said solventless cycloaliphatic epoxy resin has a viscosity of 400-1500cps at 25 ℃ and an epoxy equivalent of 140-180g/eq.
4. The high-solid environment-friendly safe transformer casting paint is characterized in that the viscosity of the solvent-free polyphenol type epoxy resin at 25 ℃ is 1500-3000cps, and the epoxy equivalent is 150-250g/eq.
5. The high solids environmentally friendly safe transformer casting paint according to any one of claims 1 to 4, wherein said solvent-free defoamer comprises one or more of solvent-free silicone defoamer, solvent-free mineral oil defoamer, solvent-free polyether defoamer, solvent-free powder defoamer.
6. The high-solid environment-friendly safe transformer casting paint as claimed in claim 5, wherein the anti-settling thixotropic agent has a density of 1.0-1.2g/cm 3 The nonvolatile matter is 45-55wt%.
7. The high-solid environment-friendly safe transformer casting paint is characterized in that the weight ratio of the accelerator to the sealing cross-linking agent is 1: (1-2).
8. The ceramic coating of claim 7, wherein the epoxy reactive diluent comprises one or more of para-tertiary butyl glycidyl ester, decyl glycidyl ether, methoxy polyethylene glycol glycidyl ether, C12-C13 alkyl glycidyl ether, C8-C10 alkyl glycidyl ether.
9. A method for preparing the high-solid environment-friendly and safe transformer casting paint according to any one of claims 1 to 8, which is characterized by at least comprising the following steps:
s1, adding solvent-free alicyclic epoxy resin, solvent-free bisphenol F type epoxy resin, defoamer, wetting dispersant and cosolvent into a paint preparation tank according to the weight ratio of the components, mixing, and stirring for 15-30min;
s2, adding an anti-settling thixotropic agent, and stirring for 15-20min;
s3, adding a flame retardant and a filler, and stirring for 30-40min;
s4, adding a sealing cross-linking agent, a leveling agent and an accelerator, and stirring for 15-20min;
s5, adding an epoxy reactive diluent, stirring for 10-15min, and filtering to obtain the high-solid environment-friendly and safe transformer pouring paint.
10. Use of a high solids, environment-friendly, safe converter casting paint according to any one of claims 1-8, in the field of miniature converters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211252763.6A CN116042056A (en) | 2022-10-13 | 2022-10-13 | High-solid environment-friendly and safe transformer pouring paint and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211252763.6A CN116042056A (en) | 2022-10-13 | 2022-10-13 | High-solid environment-friendly and safe transformer pouring paint and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116042056A true CN116042056A (en) | 2023-05-02 |
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| CN202211252763.6A Pending CN116042056A (en) | 2022-10-13 | 2022-10-13 | High-solid environment-friendly and safe transformer pouring paint and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117025051A (en) * | 2023-05-18 | 2023-11-10 | 中森新材料(深圳)有限公司 | Novel heat insulation coating for thermal runaway of battery pack and preparation method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112300668A (en) * | 2020-11-17 | 2021-02-02 | 湖北江特绝缘材料有限公司 | High-performance environment-friendly flame-retardant epoxy resin for electrician and electricity |
| CN112358789A (en) * | 2020-10-29 | 2021-02-12 | 上海振华重工（集团）常州油漆有限公司 | Preparation method and construction method of low-viscosity thick-coating solvent-free epoxy drinking water tank paint |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112358789A (en) * | 2020-10-29 | 2021-02-12 | 上海振华重工（集团）常州油漆有限公司 | Preparation method and construction method of low-viscosity thick-coating solvent-free epoxy drinking water tank paint |
| CN112300668A (en) * | 2020-11-17 | 2021-02-02 | 湖北江特绝缘材料有限公司 | High-performance environment-friendly flame-retardant epoxy resin for electrician and electricity |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117025051A (en) * | 2023-05-18 | 2023-11-10 | 中森新材料(深圳)有限公司 | Novel heat insulation coating for thermal runaway of battery pack and preparation method |
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