CN102757716A - High heat-resistant water-soluble impregnating varnish - Google Patents
High heat-resistant water-soluble impregnating varnish Download PDFInfo
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- CN102757716A CN102757716A CN2012102757106A CN201210275710A CN102757716A CN 102757716 A CN102757716 A CN 102757716A CN 2012102757106 A CN2012102757106 A CN 2012102757106A CN 201210275710 A CN201210275710 A CN 201210275710A CN 102757716 A CN102757716 A CN 102757716A
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Abstract
Disclosed is a high heat-resistant water-soluble impregnating varnish. The impregnating varnish is mainly used for impregnating motors and electrical equipment coils and filling in gaps and microvoids in an insulation system, forms continuous films on surfaces of impregnated materials, enables the coils to be bonded into a firm whole, and improves performances of the insulation system such as integrity, thermal conductivity, moisture resistance, dielectric strength and mechanical strength. The existing solvent impregnating varnish has the problems of toxicity and large environmental harm, and the existing water-soluble impregnating varnish has the problem of low drying speed, low temperature classification and the like. The highly heat resistant water-soluble impregnating varnish comprises basic resin, a curing agent, a drier, a leveling agent and a defoaming agent, wherein the amount of the curing agent accounts for 15%-30% of that of the basic resin, the amount of the drier accounts for 1%-4% of that of the basic resin, the amount of the leveling agent accounts for 0.4%-2% of that of the basic resin, and the amount of the defoaming agent accounts for 0.4%-2% of that of the basic resin.
Description
Technical field:
the present invention relates to a kind of high heat-resistant water-soluble impregnating varnish.
Background technology:
impregnating varnish is mainly used in dip treating motor, electric apparatus coil; Fill gap and micropore in the insulation system, and form continuous paint film, and make coil be bonded to a blocky integral body on impregnated thing surface; Effectively improve the globality of insulation system; Thermal conductivity, moisture resistivity, the performance of dielectric strength and physical strength.Have solvent impregnated lacquer have toxicity, to environmental hazard big and problem such as existing water-soluble impregnating varnish rate of drying is slow, temperature classification is low.
Summary of the invention:
the purpose of this invention is to provide a kind of high heat-resistant water-soluble impregnating varnish, through to the adjustment of impregnating varnish with the matrix resin prescription, make impregnating varnish have higher temperature classification, hardness, cohesive strength, toughness and electrical insulation properties.
Above-mentioned purpose realizes through following technical scheme:
a kind of high heat-resistant water-soluble impregnating varnish, its composition comprises: matrix resin, solidifying agent, siccative, flow agent, skimmer, described hardener dose are 15 ~ 30% of matrix resin; Described siccative consumption is 1 ~ 4% of a matrix resin; Described flow agent consumption is 0.4 ~ 2% of a matrix resin; Described skimmer consumption is that 0.4 ~ 2% above ratio of matrix resin is a ratio of weight and number.
described high heat-resistant water-soluble impregnating varnish; Described matrix resin is formed and is comprised: diprotic acid, divalent alcohol, trivalent alcohol, polyprotonic acid, neutralizing agent, solubility promoter; Used diprotic acid; Divalent alcohol, trivalent alcohol, the mass ratio of polyprotonic acid are 5.2:2.7 ~ 2.75:4.3 ~ 4.35:1; Using described neutralizing agent quality is 10 ~ 18% of synthetic resins gross weight, and adding described solubility promoter adjustment basic resin system solids content is 60 ~ 80%, and above ratio is a ratio of weight and number.
described high heat-resistant water-soluble impregnating varnish, described diprotic acid is a hexanodioic acid, phthalic anhydride, m-phthalic acid, its mass ratio are 1:0.4 ~ 0.45:0.5 ~ 0.55.
described high heat-resistant water-soluble impregnating varnish, described divalent alcohol is NSC 6366 and dimethylol propionic acid, its mass ratio is 1:0.3 ~ 0.35.
described high heat-resistant water-soluble impregnating varnish, it is characterized in that: described trivalent alcohol is a TriMethylolPropane(TMP), and described polyprotonic acid is trimellitic acid 1,2-anhydride, pyromellitic dianhydride, and its mass ratio is 1:0 ~ 0.4.
described high heat-resistant water-soluble impregnating varnish, described solidifying agent is methyl-etherified melamine resin 5303-98; Described siccative is thionamic acid siccative TECH-8025; Described flow agent is the BD-3033 flow agent; Described skimmer is the AW-653 skimmer; Described neutralizing agent is N, N-dimethylethanolamine, trolamine or thanomin; Described solubility promoter is ethanol, n-propyl alcohol or Virahol.
Beneficial effect:
1. the present invention through making resin have higher temperature classification, hardness, cohesive strength, toughness and electrical insulation properties with the adjustment of matrix resin prescription to impregnating varnish; Make it have curing speed faster through adjustment to the impregnating varnish prescription; And has good paint film appearance after the completely solidified, higher mechanics and electric property and higher temperature classification.
. adopt the impregnating varnish of the inventive method preparation can dilute with water, and have good rate of drying, dipping ability, have good toughness after the curing, very high hardness, cohesive strength and temperature classification.
. select the solidifying agent of melamino-formaldehyde class for use, utilize its water-soluble system that can form stable homogeneous with matrix resin; This solidifying agent can be realized the low temperature fast setting; Have a very high cross-linking density after its high reactivity functional group also can make impregnating varnish solidify, reach good insulating property and have good physical strength; The a large amount of rigidity functional group that adds that itself has in the solidifying agent can make the impregnating varnish of preparation have very high temperature classification.
. siccative is selected sulfonic acid amine siccative for use, and this type siccative can reduce the deblocking temperature of selecting solidifying agent for use, improves the curing speed of resin-curative systems, shortens impregnating varnish set time.
. flow agent is smooth, even after impregnating varnish is solidified; Skimmer not only can make lacquer liquid have good defoaming effect, and the bubble that lacquer liquid is produced in solvent evaporates and the low molecule dispose procedure in solidification process can very fast elimination.
Embodiment:
Embodiment 1:
a kind of high heat-resistant water-soluble impregnating varnish, its composition comprises: matrix resin, solidifying agent, siccative, flow agent, skimmer, described hardener dose are 15 ~ 30% of matrix resin; Described siccative consumption is 1 ~ 4% of a matrix resin; Described flow agent consumption is 0.4 ~ 2% of a matrix resin; Described skimmer consumption is 0.4 ~ 2% of a matrix resin.
Embodiment 2:
Above-mentioned high heat-resistant water-soluble impregnating varnish, described matrix resin is formed and is comprised: diprotic acid, divalent alcohol, trivalent alcohol, neutralizing agent, solubility promoter,
Described diprotic acid is a hexanodioic acid, phthalic anhydride, and m-phthalic acid, its mass ratio are 1:0.4 ~ 0.45:0.5 ~ 0.55;
Described divalent alcohol is NSC 6366 and dimethylol propionic acid, and its mass ratio is 1:0.3 ~ 0.35;
Described trivalent alcohol is a TriMethylolPropane(TMP);
Described polyprotonic acid is trimellitic acid 1,2-anhydride, pyromellitic dianhydride, and its mass ratio is 1:0 ~ 0.4;
Used diprotic acid, divalent alcohol, trivalent alcohol, the mass ratio of polyprotonic acid are 5.2:2.7 ~ 2.75:4.3 ~ 4.35:1;
It is 10 ~ 18% of synthetic resins gross weight that described neutralizing agent quality is used in
, and adding described solubility promoter adjustment basic resin system solids content is 60 ~ 80%.
Embodiment 3:
The high heat-resistant water-soluble impregnating varnish that
are above-mentioned; Described matrix resin is formed and comprised: diprotic acid, divalent alcohol, trivalent alcohol, neutralizing agent, solubility promoter, described diprotic acid are hexanodioic acid, phthalic anhydride; M-phthalic acid, its mass ratio are 1:0.4:0.5; Described divalent alcohol is NSC 6366 and dimethylol propionic acid, and its mass ratio is 1:0.3; Described trivalent alcohol is a TriMethylolPropane(TMP), and described polyprotonic acid is trimellitic acid 1,2-anhydride, pyromellitic dianhydride, and its mass ratio is 1:0; Used diprotic acid; Divalent alcohol, trivalent alcohol, the mass ratio of polyprotonic acid are 5.2:2.7:4.3:1; Using described neutralizing agent quality is 10% of synthetic resins gross weight, and adding described solubility promoter adjustment basic resin system solids content is 60%.
Embodiment 4:
The high heat-resistant water-soluble impregnating varnish that
are above-mentioned; Described matrix resin is formed and comprised: diprotic acid, divalent alcohol, trivalent alcohol, neutralizing agent, solubility promoter, described diprotic acid are hexanodioic acid, phthalic anhydride; M-phthalic acid, its mass ratio are 1:0.45:0.55; Described divalent alcohol is NSC 6366 and dimethylol propionic acid, and its mass ratio is 1:0.35; Described trivalent alcohol is a TriMethylolPropane(TMP), and described polyprotonic acid is trimellitic acid 1,2-anhydride, pyromellitic dianhydride, and its mass ratio is 1:0.4; Used diprotic acid; Divalent alcohol, trivalent alcohol, the mass ratio of polyprotonic acid are 5.2:2.75:4.35:1; Using described neutralizing agent quality is 18% of synthetic resins gross weight, and adding described solubility promoter adjustment basic resin system solids content is 80%.
Embodiment 5:
The high heat-resistant water-soluble impregnating varnish that
are above-mentioned, described solidifying agent are methyl-etherified melamine resin 5303-98; Described siccative is thionamic acid siccative TECH-8025; Described flow agent is the BD-3033 flow agent; Described skimmer is the AW-653 skimmer; Described neutralizing agent is N, in N-dimethylethanolamine, trolamine and the thanomin one or more; Described solubility promoter be ethanol, n-propyl alcohol and Virahol one or more.
Embodiment 6:
The high heat-resistant water-soluble impregnating varnish that
are above-mentioned is the main body with the matrix resin for preparing, and adds solidifying agent, siccative, flow agent and skimmer and is mixed with impregnating varnish liquid.Be that ℃ to be coated with four glasss of viscosity be that 13s-22s floods to solvent cut to 23 with water;
The liquid-solid scale of construction of
lacquer is between 60 ~ 80%, and viscosity is bigger.In use being diluted with water to amount of solid is 15 ~ 30%, and adjustment viscosity is carried out dipping lacquer to desired value.Curing process is selected for use the different solidification value time with requiring according to the workpiece size under 110 ~ 150 ℃, to smoke 1 ~ 5 hour.The impregnating varnish of preparation can the water infinite dilution, and the pH value is 7 ~ 8.5, and acid number is 48-53mgKOH/g, and amount of solid is that 25% o'clock VOC content is 5 ~ 10g/L; It solidifies the back cohesive strength greater than 22N (GB/T11028-1999), and temperature classification is the H level, and volume specific resistance is not less than 1 * 10 12 Ω m, surface resistivity is not less than 1 * 10 12 Ω, immersion back volume specific resistance is not less than 1 * 10 10 Ω m, surface resistivity is not less than 1 * 10 10 Ω.
Claims (8)
1. one kind high heat-resistant water-soluble impregnating varnish, its composition comprises: matrix resin, solidifying agent, siccative, flow agent, skimmer is characterized in that: described hardener dose is 15 ~ 30% of a matrix resin; Described siccative consumption is 1 ~ 4% of a matrix resin; Described flow agent consumption is 0.4 ~ 2% of a matrix resin; Described skimmer consumption is that 0.4 ~ 2% above ratio of matrix resin is a ratio of weight and number.
2. high heat-resistant water-soluble impregnating varnish according to claim 1; It is characterized in that: described matrix resin is formed and is comprised: diprotic acid, divalent alcohol, trivalent alcohol, polyprotonic acid, neutralizing agent, solubility promoter; Used diprotic acid; Divalent alcohol, trivalent alcohol, the mass ratio of polyprotonic acid are 5.2:2.7 ~ 2.75:4.3 ~ 4.35:1; Using described neutralizing agent quality is 10 ~ 18% of synthetic resins gross weight, and adding described solubility promoter adjustment basic resin system solids content is 60 ~ 80%, and above ratio is a ratio of weight and number.
3. high heat-resistant water-soluble impregnating varnish according to claim 2 is characterized in that: described diprotic acid is a hexanodioic acid, phthalic anhydride, and m-phthalic acid, its mass ratio are 1:0.4 ~ 0.45:0.5 ~ 0.55.
4. according to claim 2 or 3 described high heat-resistant water-soluble impregnating varnishes, it is characterized in that: described divalent alcohol is NSC 6366 and dimethylol propionic acid, and its mass ratio is 1:0.3 ~ 0.35.
5. according to claim 2 or 3 described high heat-resistant water-soluble impregnating varnishes, it is characterized in that: described trivalent alcohol is a TriMethylolPropane(TMP), and described polyprotonic acid is trimellitic acid 1,2-anhydride, pyromellitic dianhydride, and its mass ratio is 1:0 ~ 0.4.
6. according to claim 1 or 2 or 3 described high heat-resistant water-soluble impregnating varnishes, it is characterized in that: described solidifying agent is methyl-etherified melamine resin 5303-98; Described siccative is thionamic acid siccative TECH-8025; Described flow agent is the BD-3033 flow agent; Described skimmer is the AW-653 skimmer; Described neutralizing agent is N, N-dimethylethanolamine, trolamine or thanomin; Described solubility promoter is ethanol, n-propyl alcohol or Virahol.
7. high heat-resistant water-soluble impregnating varnish according to claim 4 is characterized in that: described solidifying agent is methyl-etherified melamine resin 5303-98; Described siccative is thionamic acid siccative TECH-8025; Described flow agent is the BD-3033 flow agent; Described skimmer is the AW-653 skimmer; Described neutralizing agent is N, N-dimethylethanolamine, trolamine or thanomin; Described solubility promoter is ethanol, n-propyl alcohol or Virahol.
8.. dipping method that utilizes high heat-resistant water-soluble impregnating varnish; Matrix resin with preparation is the main body; Adding solidifying agent, siccative, flow agent and skimmer and be mixed with the impregnating varnish liquid of one of claim 1-6, is that ℃ to be coated with four glasss of viscosity be that 13s-22s floods to solvent cut to 23 with water;
Coat with lacquer the liquid-solid scale of construction between 60 ~ 80%, viscosity is bigger; In use being diluted with water to amount of solid is 15 ~ 30%, and adjustment viscosity is carried out dipping lacquer to desired value;
Curing process: under 110 ~ 150 ℃, smoked 1 ~ 5 hour; The concrete time is selected the solidification value time for use according to workpiece size and requirement, the impregnating varnish dilute with water of preparation, and the pH value is 7 ~ 8.5; Acid number is 48-53mgKOH/g, and amount of solid is that 25% o'clock VOC content is 5 ~ 10g/L; It solidifies the back cohesive strength greater than 22N (GB/T11028-1999), and temperature classification is the H level, and volume specific resistance is not less than 1 * 10
12Ω m, surface resistivity is not less than 1 * 10
12Ω, immersion back volume specific resistance is not less than 1 * 10
10Ω m, surface resistivity is not less than 1 * 10
10Ω.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012102757106A CN102757716A (en) | 2012-08-05 | 2012-08-05 | High heat-resistant water-soluble impregnating varnish |
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| CN2012102757106A CN102757716A (en) | 2012-08-05 | 2012-08-05 | High heat-resistant water-soluble impregnating varnish |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0413859A1 (en) * | 1988-08-18 | 1991-02-27 | Exxon Chemical Patents Inc. | Metal protecting compositions |
| CN101503510A (en) * | 2009-03-09 | 2009-08-12 | 嘉兴市清河高力绝缘有限公司 | Preparation of water-soluble polyester resin for silicon steel sheet insulation processing |
| CN102229782A (en) * | 2011-06-20 | 2011-11-02 | 上虞市佑谦特种材料有限公司 | PU elastic paint |
| CN102408820A (en) * | 2011-07-29 | 2012-04-11 | 哈尔滨理工大学 | Preparation method of water-soluble low-contact-angle half-inorganic silicon sheet varnish |
-
2012
- 2012-08-05 CN CN2012102757106A patent/CN102757716A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0413859A1 (en) * | 1988-08-18 | 1991-02-27 | Exxon Chemical Patents Inc. | Metal protecting compositions |
| CN101503510A (en) * | 2009-03-09 | 2009-08-12 | 嘉兴市清河高力绝缘有限公司 | Preparation of water-soluble polyester resin for silicon steel sheet insulation processing |
| CN102229782A (en) * | 2011-06-20 | 2011-11-02 | 上虞市佑谦特种材料有限公司 | PU elastic paint |
| CN102408820A (en) * | 2011-07-29 | 2012-04-11 | 哈尔滨理工大学 | Preparation method of water-soluble low-contact-angle half-inorganic silicon sheet varnish |
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Application publication date: 20121031 |