CN102604384B - Universal refrigerant resistant solvent-free impregnating resin for high and low voltage motor and preparation method thereof - Google Patents
Universal refrigerant resistant solvent-free impregnating resin for high and low voltage motor and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a universal refrigerant resistant solvent-free impregnating resin for a high and low voltage motor and a preparation method thereof. The impregnating resin is composed of 45-65 parts of unsaturated polyesterimide resin solution with 65-75% of solid content, 15-35 parts of oxazolidone resin solution with 75-85% of solid content, 10-25 parts of environment-friendly diluting agent, 3-8 parts of curing agent, 1-3 parts of initiating agent and 0.01-0.06 part of polymerization inhibitor; the raw material formula of an unsaturated polyesterimide resin comprises a first monomer, a second monomer and a third monomer, wherein the first monomer is selected from one or multiple of neopentyl glycol, propoxylation bisphenol A and trihydroxyethyl isocyanurate; the second monomer is selected from one or multiple of isophthalic acid, hexanedioic acid, trimellitie anhydride and maleic anhydride; and the third monomer is a compound containing imide groups. The resin provided by the invention has low content of VOC (Volatile Organic Compounds), resists novel refrigerating fluids such as R134a and is universal for the high and low voltage motor.
Description
Technical field
The invention belongs to insulated impregnating resin (vacuum pressure impregnation) technical field, particularly general solvent-free impregnating resin of high-low pressure motor of a kind of cold-resistant matchmaker and preparation method thereof.
Background technology
The electrical equipment and electrical such as motor, transformer winding only has after the insulation dipping lacquer is processed and could move safely and reliably.Winding coil is after the VPI dipping lacquer is processed, it is as a whole that baked and cured becomes, improve insulating property and physical strength, avoided internal air gap to produce shelf depreciation, improved the abilities such as protection against the tide and salt spray resistance, strengthen serviceability, increasing the service life, is one of most important link in motor manufacturing process.The motor of refrigerant cools, winding Long Term Contact refrigerant, original refrigeration agent that generally uses is called R22 " freonll-11 ", and this refrigeration agent can destroy the high-altitude ozonosphere, thereby causes Global warming.China is comprehensive forbidding " freonll-11 " class refrigeration agent in 1 day January in 2010.Therefore, adopt novel refrigerant to become a developing direction of world's refrigeration industry.
China is as producing in the world the big country of conditioner and compressor of air conditioner, be faced with and requiring the strict market access rule in the world such as harsh, closely guarded American-European air-conditioning market, superseded cry to R22 class refrigeration working medium is more and more higher in the world, some developed countries refuse the import of R22 air-conditioning products especially, therefore, the Air-conditioning Enterprise of China faces the revolution of replacing the R22 refrigeration working medium, and at first who can obtain initiative on market, just occupied undoubtedly certain first chance.
By contrast, the R407c of new cooling media, the R410a of environment-friendly type, R134a etc. are zero to the destructive rate of ozonosphere, and refrigeration, heating efficiency are high, can make the conditioner Energy Efficiency Ratio raise approximately 10%, are thought the optimal refrigerant of present domestic air conditioning by International refrigeration circle.And these two kinds of new cooling medias also are easy to realize the miniaturization of air-conditioning system, have saved to a certain extent material and manufacturing expense.
Novel refrigerant R134a, its vaporization temperature is-26.5 ℃, and main thermodynamic property is similar to R22, can not destroy airborne ozonosphere, and relative environmental protection is more satisfactory R22 alternative refrigerant.But R134a has stronger chemically reactive, and is larger to the swelling action of insulating material.R134a also needs to be used in conjunction with lubricating oil in esters, and the wetting ability of ester oil is strong, more strengthens it to the effect of insulating material.
Cold-resistant matchmaker's impregnating varnish in the market is mainly the epoxy type non-solvent paint, and solvent is about 30～40%, and in solidification process, solvent all evaporates, and is discharged in atmosphere, not only causes the wasting of resources, also brings environmental pollution, the infringement worker health.Simultaneously, non-solvent paint is not suitable for the VPI system of high-voltage motor, and high pressure is few with cold-resistant matchmaker's solvent-free paint kind, viscosity is large, needs the heating dipping, and the high-low pressure motor separates dipping lacquer and brings inconvenience to factory management.There is no also on market to take into account that the high-voltage motor impregnability is good, good electrical property and low voltage motor hang that the paint amount is large, the general cold-resistant matchmaker's insulating resin of environment-friendly type high-low pressure that cohesive force is strong, and this be refrigeration motor manufacturing concern in the urgent need to.Therefore, development low viscosity, low volatilization, the general cold-resistant matchmaker's motor of environment-friendly type of high-low pressure motor just seem particularly urgent and important with solvent-free impregnating resin.
In existing cold-resistant matchmaker's insullac (resin), typically as the CC-1105 insullac of U.S. DOLPHON company, viscosity is greater than 100s (4# viscometer both at home and abroad, 25 ℃), be applied to high-voltage motor insulated processing, need the heating dipping, use inconvenience, expensive.The DY001 insullac of domestic Sichuan Dongcai Technology Group Co., Ltd is applied to the insulation processing of low voltage motor, and solvent is greater than 40%, and volatilization is large, contaminate environment, not environmental protection, be not suitable for high-voltage motor.But also there is no the general cold-resistant matchmaker's insulated impregnating resin of environment-friendly type high-low pressure motor that can both take into account on market, thus need exploitation a kind of brand-new, without the general cold-resistant matchmaker's solvent impregnated resin of the environment-friendly type high-low pressure motor of the volatile substances such as vinylbenzene, cold-resistant matchmaker's excellent property.
Summary of the invention
Technical problem to be solved by this invention is to overcome the deficiencies in the prior art, and a kind of cold-resistant matchmaker's the general solvent-free impregnating resin of high-low pressure motor is provided.
The present invention also will provide the preparation method of a kind of cold-resistant matchmaker's the general solvent-free impregnating resin of high-low pressure motor simultaneously.
For solving above technical problem, a kind of technical scheme that the present invention takes is: a kind of cold-resistant matchmaker's the general solvent-free impregnating resin of high-low pressure motor, and its component by following weight proportion forms:
Solid content is 40～65 parts of 65%～75% unsaturated polyester-imide resin solutions;
Solid content is 15～35 parts of 75%～85% De Ju oxazolidone resin solutions;
10～25 parts of environment-friendly type thinners;
3～8 parts, solidifying agent;
1～3 part of initiator;
0.01～0.06 part of stopper,
The composition of raw materials of described unsaturated polyester-imide resin comprises the first monomer, the second monomer and the 3rd monomer, and wherein: the first monomer is for being selected from one or more in neopentyl glycol, propoxylated bisphenol (D-33 monomer) and trihydroxyethyl isocyanuric ester; The second monomer is to be selected from one or more in m-phthalic acid, hexanodioic acid, trimellitic anhydride and MALEIC ANHYDRIDE; The 3rd monomer is the compound that includes imide group, and it is obtained by the acid anhydrides and the thanomin reaction that are selected from tetrahydrophthalic anhydride, trimellitic anhydride, cis-butenedioic anhydride, methyl tetrahydro phthalic anhydride, methyl hexahydrophthalic anhydride and phthalic anhydride; Perhaps, the 3rd monomer is obtained by trimellitic anhydride and the amine reaction that is selected from aniline, thanomin, diphenylmethane diamine and phenylenediamine or derivatives thereof; The consumption of described the first monomer, the second monomer, the 3rd monomer satisfies [COO
-]: [OH
-]: [CONH]=0.8～1.0: 1.0～1.2: 0.1～0.4;
The preparation method of described unsaturated polyester-imide resin solution is: described the first monomer, the second monomer and the 3rd monomer that at first makes formula ratio reaction at 180～220 ℃ of temperature and under protection of inert gas obtains the unsaturated polyester-imide resin, then add environment-friendly type thinner dissolving unsaturated polyester-imide resin, namely get described unsaturated polyester-imide resin solution;
The preparation method of described poly-oxazolidone resin solution is: at first make the reaction of vulcabond and Racemic glycidol ether type epoxy obtain poly-oxazolidone resin, then add the environment-friendly type thinner, namely get described Ju oxazolidone resin solution, wherein, the molar ratio of vulcabond and Racemic glycidol ether type epoxy is 1.2～2.0: 1.
According to a concrete aspect of the present invention, described the 3rd monomer is the acid of trimellitic anhydride imide, the imide acid of trimellitic acid anhydride phenyl or tetrahydrophthalic anhydride imines ethyl alcohol.Described the first monomer is the combination of neopentyl glycol or neopentyl glycol and trihydroxyethyl isocyanuric ester.
According to the present invention, described vulcabond is preferably and is selected from one or more in tolylene diisocyanate, '-diphenylmethane diisocyanate and isophorone diisocyanate.Racemic glycidol ether type epoxy used is preferably 128 epoxy resin, 616 epoxy resin or 6101 epoxy resin.
According to the present invention, described environment-friendly type thinner includes but not limited to Vinyl toluene, acrylate and Phthalic acid, diallyl ester etc.For the preparation of the environment-friendly type thinner of unsaturated polyester-imide resin solution, can be identical for the preparation of environment-friendly type thinner and the environment-friendly type thinner in formula of Ju oxazolidone resin solution, can be different.
According to the present invention, described solidifying agent can be for being selected from one or more the combination in chromium acetylacetonate, methyl ethyl diketone zirconium, aluminium acetylacetonate and isocaprylic acid zinc or zinc naphthenate.Described initiator is preferably the peroxide initiator, such as peroxidized t-butyl perbenzoate, dicumyl peroxide, tertbutyl peroxide etc.Described stopper can be for being selected from one or more the combination in Resorcinol, p methoxy phenol, para benzoquinone and p-ten.-butylcatechol.
The another technical scheme that the present invention takes is: the preparation method of a kind of above-mentioned cold-resistant matchmaker's the general solvent-free impregnating resin of high-low pressure motor, it comprises the steps:
(1), the preparation solid content is 65%～75% unsaturated polyester-imide resin solution: with the first monomer, the second monomer and the 3rd monomer, under esterifying catalyst exists, be warming up to 180～220 ℃ in inert atmosphere, reaction 5～6h, when acid number is down to 20mgKOH/g when following, be cooled to below 100 ℃, add the dissolving of environment-friendly type thinner, and get final product;
(2), the preparation solid content is 75%～85% poly-oxazolidone resin solution: add Racemic glycidol ether type epoxy and catalyzer in reactor, slowly drip vulcabond, be warming up to 150 ℃～170 ℃, reaction 3～4h, be cooled to below 100 ℃, add the dissolving of environment-friendly type thinner, and get final product, wherein, the molar ratio of vulcabond and Racemic glycidol ether type epoxy is 1.2～2.0: 1;
(3), will be according to the unsaturated polyester-imide resin solution of step (1) preparation, mix by formula according to step (2) preparation De Ju oxazolidone resin solution, environment-friendly type thinner, solidifying agent, initiator and stopper, namely get described cold-resistant matchmaker's the general solvent-free impregnating resin of high-low pressure motor.
The conventional catalyst that esterifying catalyst can adopt for esterification in step (1) is tosic acid for example.The described catalyzer of step (2) can be the catalyzer of the poly-oxazolidone resin employing of the preparation of routine, such as chlorinating benzyl triethylamine, 2-ethyl-4-methylimidazole etc.
Owing to adopting technique scheme, the present invention compared with prior art has the following advantages:
The invention solves that the toxicity that exists in prior art is large, volatile, contaminate environment, the high-low pressure motor can not be general etc. defective, obtain a kind of cold-resistant matchmaker's motor of environment-friendly type solvent-free impregnating resin that does not contain volatile vinylbenzene reactive thinner.The novel refrigerant high-low pressure motor such as volatile styrenic reactive thinner, VOC content are low, anti-R134a is general but this resin does not contain, and is applied to the insulation technology field of cold-resistant matchmaker's motor of low pressure and high pressure.
Embodiment
The present invention will be described in detail below in conjunction with specific embodiment.Should be understood that these embodiment are for explanation the present invention rather than limit the scope of the invention.The implementation condition that adopts in embodiment can require according to the difference of concrete use to do further adjustment, and not marked implementation condition is the condition in normal experiment.
Embodiment 1
Formula according to the solvent-free impregnating resin of the present embodiment is as follows:
Solid content is 70% unsaturated polyester-imide resin solution 6kg;
Solid content is 80% De Ju oxazolidone resin solution 1.8kg;
Cross-linking monomer (Vinyl toluene) 1.5kg;
Solidifying agent (chromium acetylacetonate) 0.35kg;
Initiator (dicumyl peroxide) 0.175kg;
Stopper (Resorcinol) 2.4g.
The preparation of described solvent-free impregnating resin comprises the steps:
(1), the preparation solid content is 70% unsaturated polyester-imide resin solution: add 252g neopentyl glycol, 116g m-phthalic acid, 128g MALEIC ANHYDRIDE, the acid of 53.4g trimellitic anhydride (phenyl) imide and 0.5g tosic acid in a standard there-necked flask; be warming up to 200 ℃ under nitrogen protection; reaction 5～6h; when acid number is down to 20mgKOH/g when following; be cooled to 100 ℃, add the abundant stirring and dissolving of 200g Vinyl toluene even.
(2), the preparation solid content is 80% De Ju oxazolidone resin solution: add 1156g 128 epoxy resin and 8.5g chlorinating benzyl triethylamine in a standard there-necked flask, slowly drip the 249g tolylene diisocyanate, be warming up to 160 ℃, reaction 3～4h, be cooled to 100 ℃, add the Vinyl toluene dilution.
(3), get 6kg and prepare De Ju oxazolidone resin, 1.5kg Vinyl toluene, 0.35kg chromium acetylacetonate, 175g dicumyl peroxide, 2.4g Resorcinol according to unsaturated polyester-imide resin, the 1.8kg that step (1) method prepares by step (2) method, add in mixing kettle to stir, namely get described solvent-free impregnating resin.The 48s when viscosity of this gained solvent impregnated resin is 23 ℃, 4# viscometer, 4min50s when gel time is 135 ℃.
Embodiment 2
Formula according to the solvent-free impregnating resin of the present embodiment is as follows:
Solid content is 70% unsaturated polyester-imide resin solution 4.5kg;
Solid content is 80% De Ju oxazolidone resin solution 3.2kg;
Cross-linking monomer (Vinyl toluene) 2kg;
Solidifying agent (methyl ethyl diketone zirconium) 0.5kg;
Initiator: dicumyl peroxide 200g+ peroxidized t-butyl perbenzoate 40g;
Stopper (para benzoquinone) 4.5g.
The preparation of described solvent-free impregnating resin comprises the steps:
(1), the preparation solid content is 70% unsaturated polyester-imide resin solution: add 238g neopentyl glycol, 26.1g match gram, 116g m-phthalic acid, 14.6g hexanodioic acid, 128g MALEIC ANHYDRIDE, 19.5g tetrahydrophthalic anhydride imines ethyl alcohol and 0.45g tosic acid in a standard there-necked flask; be warming up to 200 ℃ of reaction 5～6h under nitrogen protection; when acid number is down to 20mgKOH/g when following; be cooled to 100 ℃, add the abundant stirring and dissolving of 150g Vinyl toluene even.
(2), preparation Ju oxazolidone resin: add 1236g 6101 epoxy resin and 8g chlorinating benzyl triethylamine in a standard there-necked flask, slowly drip the 540g '-diphenylmethane diisocyanate, be warming up to 160 ℃ of reaction 3～4h, be cooled to 100 ℃ and add the Vinyl toluene dilution.
(3), get 4.5kg and prepare De Ju oxazolidone resin, 2kg Vinyl toluene, 500g methyl ethyl diketone zirconium, 200g dicumyl peroxide, 40g peroxidized t-butyl perbenzoate, 4.5g para benzoquinone according to unsaturated polyester-imide resin, the 3.2kg that step (1) method prepares by step (2) method, add in mixing kettle to stir, namely get described solvent-free impregnating resin.The 44s when viscosity of this gained solvent impregnated resin is 23 ℃, 4# viscometer, 4min33s when gel time is 135 ℃.
The solvent-free impregnating resin of embodiment 1 is applied to flood the cold-resistant matchmaker's motor of H315 low pressure, and has carried out cold-resistant matchmaker's test, specific as follows:
H315 there is the winding stator core in 100 ℃ of preheating 2h, impregnated in the solvent-free impregnating resin of embodiment 1, take out after 15min, room temperature drip-dry 1h, the baking oven of putting into 155 ℃ cures 8h.The rear observation stator winding of coming out of the stove hangs that paint is plentiful, bonding firmly, through the test of the autoclave refrigerant of anti-R134a, test method be according to GB/T13501-1992＜motor for closed type refrigeration compressor anti-fluorine test method that insulate 〉, test temperature: 175 ℃; Test pressure: 2.5MPa, test period: 168h, result is referring to table 1.
Performance comparison before and after table 1: the embodiment 1 cold-resistant matchmaker of the solvent-free impregnating resin dipping cold-resistant matchmaker's motor of H315 low pressure tests
Referring to table 1, the physical properties before and after solvent-free impregnating resin cold-resistant matchmaker in autoclave tests and normality test data change little, have still kept very high performance level, show that cold-resistant matchmaker is functional.
The solvent-free impregnating resin of embodiment 2 is applied to the cold-resistant matchmaker's motor of vacuum pressure impregnation YSR series 10kV high pressure, and has carried out cold-resistant matchmaker's test, specific as follows:
The cold-resistant matchmaker's motor of YSR series 10kV high pressure is had the winding stator core in 80 ℃ of preheating 3h, put into the airtight 40Pa of being evacuated to of impregnating autoclave, keep 3h, open the defeated paint of defeated paint valve to flooding workpiece, remove vacuum, plus-pressure keeps 5h to 0.6MPa.Pressure relief is taken out workpiece, room temperature drip-dry 2h, and the baking oven of putting into 155 ℃ cures 12h.Coming out of the stove, rear observation stator winding impregnability is good, physical strength is high, and through the test of the autoclave refrigerant of anti-R134a, test method is according to GB/T13501-1992＜anti-fluorine test method of motor for closed type refrigeration compressor insulation 〉, test temperature: 175 ℃; Test pressure: 2.5MPa, test period: 168h, result is referring to table 2.
Performance comparison before and after table 2: the embodiment 2 cold-resistant matchmakers of solvent-free impregnating resin dipping 10kV level high-voltage motor simulated line rod test
Annotate: sequence number 1,2,3 is the performance test data before the refrigerant test, and sequence number 4,5,6 is the performance test data after the refrigerant test.
Can be found out by table 2 testing data, after 10kV level high-voltage motor simulated line rod dipping solvent-free impregnating resin, physical properties before and after cold-resistant matchmaker tests in autoclave and normality test data change little, have still kept higher performance level, show that cold-resistant matchmaker is functional.
With respect to prior art, solvent-free impregnating resin provided by the invention has following advantage:
1. do not conform to volatile reactive thinner vinylbenzene in resin system of the present invention, VOC content is low, is conducive to environment protection and operator are healthy; Meet the Energy policy that national energy-saving reduces discharging, reduce the production cost of enterprise.
2, the cold-resistant matchmaker's excellent property of resin system of the present invention, to novel refrigerants such as the stronger R134a of corrodibility, R410a, have good effect.
3, resin system of the present invention, storge quality is good, and after dipping lacquer, winding extension paint amount is high, cohesive force is strong; After solidifying, (room temperature, hot) good electrical property, the thermotolerance of resin are high.
4, the resin system of technical solution of the present invention not only can satisfy the loose embedding winding of low voltage motor to cohesive force, hang the paint amount requirement, but also can satisfy high-voltage motor to the requirement of impregnability, stability in storage, electrical property aspect, but the high-low pressure motor is general, facilitated user's production management, escapable cost cuts the waste.
In sum, the low viscosity that the invention discloses, the cold-resistant matchmaker's motor of low-volatile environment-friendly type are processed with the insulation impregnating that solvent-free impregnating resin can be widely used in the cold-resistant matchmaker's electrical equipment and electrical of high-low pressure.
Above-described embodiment only is explanation technical conceive of the present invention and characteristics; its purpose is to allow person skilled in the art scholar can understand content of the present invention and implement according to this; can not limit protection scope of the present invention with this; all equivalences that spirit is done according to the present invention change or modify, within all should being encompassed in protection scope of the present invention.
Claims (6)
1. a cold-resistant matchmaker the general solvent-free impregnating resin of high-low pressure motor, it is characterized in that: its component by following weight proportion forms:
Solid content is 40 ~ 65 parts of 65% ~ 75% unsaturated polyester-imide resin solutions;
Solid content is 15 ~ 35 parts of 75% ~ 85% De Ju oxazolidone resin solutions;
10 ~ 25 parts of environment-friendly type thinners;
3 ~ 8 parts, solidifying agent;
1 ~ 3 part of initiator;
0.01 ~ 0.06 part of stopper,
The composition of raw materials of described unsaturated polyester-imide resin comprises the first monomer, the second monomer and the 3rd monomer, and wherein: the first monomer is to be selected from one or more in neopentyl glycol, propoxylated bisphenol and trihydroxyethyl isocyanuric ester; The second monomer is to be selected from one or more in m-phthalic acid, hexanodioic acid, trimellitic anhydride and MALEIC ANHYDRIDE; The 3rd monomer is the compound that includes imide group, and it is obtained by the acid anhydrides and the thanomin reaction that are selected from tetrahydrophthalic anhydride, trimellitic anhydride, cis-butenedioic anhydride, methyl tetrahydro phthalic anhydride, methyl hexahydrophthalic anhydride and phthalic anhydride; Perhaps, the 3rd monomer is obtained by trimellitic anhydride and the amine reaction that is selected from aniline, thanomin, diphenylmethane diamine and phenylenediamine or derivatives thereof; The consumption of described the first monomer, the second monomer, the 3rd monomer satisfies [COO
-]: [OH
-]: [CONH]=0.8 ~ 1.0:1.0 ~ 1.2:0.1 ~ 0.4;
The preparation method of described unsaturated polyester-imide resin solution is: described the first monomer, the second monomer and the 3rd monomer that at first makes formula ratio reaction at 180 ~ 220 ℃ of temperature and under protection of inert gas obtains the unsaturated polyester-imide resin, then add environment-friendly type thinner dissolving unsaturated polyester-imide resin, namely get described unsaturated polyester-imide resin solution;
The preparation method of described poly-oxazolidone resin solution is: at first make the reaction of vulcabond and Racemic glycidol ether type epoxy obtain poly-oxazolidone resin, then add the environment-friendly type thinner, namely get described Ju oxazolidone resin solution, wherein, the molar ratio of vulcabond and Racemic glycidol ether type epoxy is 1.2 ~ 2.0:1;
Described environment-friendly type thinner is one or more the combination that is selected from Vinyl toluene, acrylate and Phthalic acid, diallyl ester, for the preparation of the environment-friendly type thinner of unsaturated polyester-imide resin solution, identical or different for the preparation of environment-friendly type thinner and the environment-friendly type thinner in formula of Ju oxazolidone resin solution;
Described solidifying agent is one or more the combination that is selected from chromium acetylacetonate, methyl ethyl diketone zirconium, aluminium acetylacetonate and isocaprylic acid zinc or zinc naphthenate;
Described initiator is the peroxide initiator; Described stopper is selected from one or more the combination in Resorcinol, p methoxy phenol, para benzoquinone and p-ten.-butylcatechol.
2. the cold-resistant matchmaker's according to claim 1 general solvent-free impregnating resin of high-low pressure motor is characterized in that: described the 3rd monomer is the acid of trimellitic anhydride imide, the imide acid of trimellitic acid anhydride phenyl or tetrahydrophthalic anhydride imines ethyl alcohol.
3. the cold-resistant matchmaker's according to claim 1 and 2 general solvent-free impregnating resin of high-low pressure motor, it is characterized in that: described the first monomer is the combination of neopentyl glycol or neopentyl glycol and trihydroxyethyl isocyanuric ester.
4. the cold-resistant matchmaker's according to claim 1 general solvent-free impregnating resin of high-low pressure motor is characterized in that: described vulcabond is to be selected from one or more in tolylene diisocyanate, '-diphenylmethane diisocyanate and isophorone diisocyanate.
5. according to claim 1 or 4 described cold-resistant matchmakers' the general solvent-free impregnating resin of high-low pressure motor, it is characterized in that: Racemic glycidol ether type epoxy used is 128 epoxy resin, 616 epoxy resin or 6101 epoxy resin.
6. the preparation method of the described cold-resistant matchmaker of claim 1 the general solvent-free impregnating resin of high-low pressure motor, is characterized in that: comprise the steps:
(1), the preparation solid content is 65% ~ 75% unsaturated polyester-imide resin solution: with the first monomer, the second monomer and the 3rd monomer, under esterifying catalyst exists, be warming up to 180 ~ 220 ℃ in inert atmosphere, reaction 5 ~ 6h, when acid number is down to 20mgKOH/g when following, be cooled to below 100 ℃, add the dissolving of environment-friendly type thinner, and get final product;
(2), the preparation solid content is 75% ~ 85% poly-oxazolidone resin solution: add Racemic glycidol ether type epoxy and catalyzer in reactor, slowly drip vulcabond, be warming up to 150 ℃ ~ 170 ℃, reaction 3 ~ 4h, be cooled to below 100 ℃, add the dissolving of environment-friendly type thinner, and get final product, wherein, the molar ratio of vulcabond and Racemic glycidol ether type epoxy is 1.2 ~ 2.0:1;
(3), will be according to the unsaturated polyester-imide resin solution of step (1) preparation, mix by formula according to step (2) preparation De Ju oxazolidone resin solution, environment-friendly type thinner, solidifying agent, initiator and stopper, namely get described cold-resistant matchmaker's the general solvent-free impregnating resin of high-low pressure motor.
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| CN109735142B (en) * | 2018-12-12 | 2021-05-18 | 苏州太湖电工新材料股份有限公司 | Environment-friendly insulating impregnating varnish and preparation method and application thereof |
| CN110724400A (en) * | 2019-11-25 | 2020-01-24 | 南通百川新材料有限公司 | Low-volatility polyesterimide impregnating resin wire enamel and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1033165C (en) * | 1992-10-10 | 1996-10-30 | 隋学军 | Polyester imine resin |
| CN100453578C (en) * | 2006-05-12 | 2009-01-21 | 吴江市太湖绝缘材料厂 | Bi-maleimide modified heat resistant unsaturated polyester resin |
| US9006350B2 (en) * | 2006-12-22 | 2015-04-14 | Axalta Coating Systems Ip Co., Llc | Selfbonding enamels based on new polyester amide imides and polyester amides |
| CN101892006B (en) * | 2010-03-22 | 2012-12-19 | 中国船舶重工集团公司第七一二研究所 | Insulating paint for variable frequency motor and preparation method thereof |
| CN102277079A (en) * | 2011-08-02 | 2011-12-14 | 上海晟然绝缘材料有限公司 | Non-pinhole rapid direct-welding polyurethane enamelled wire insulating varnish with high heat grade and preparation method thereof |
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