CN103130964B - Low, Medium-voltage motor solvent-free impregnating resin and curing - Google Patents
Low, Medium-voltage motor solvent-free impregnating resin and curing Download PDFInfo
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- CN103130964B CN103130964B CN201310046977.2A CN201310046977A CN103130964B CN 103130964 B CN103130964 B CN 103130964B CN 201310046977 A CN201310046977 A CN 201310046977A CN 103130964 B CN103130964 B CN 103130964B
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Abstract
The invention discloses a kind of low, Medium-voltage motor solvent-free impregnating resin, by weight percentage, it consists of: heat resistant unsaturated polyester resin: 40-60% benzoxazine imide resin 5-10%, epoxy resin: 10-15%, initiator: 0.5-2.0%, reactive thinner: 7.0-15%, solidifying agent: 7.0-20%, curing catalyst: 0.1-1.0%.Present invention employs benzoxazine imide resin and synthesize the imine modified unsaturated solvent-free impregnating resin of benzoxazine, improve the thermotolerance of solvent impregnated resin, the thermotolerance of epoxy unsaturated polyester is made to rise to the thermal level of polyester-imide, be equipped with high-performance solidifying agent, ensure that this solvent impregnated resin overcomes that short, hot surface drying of conventional solventfree resin shelf lives is poor, shrinking percentage is large, hang the shortcomings such as the low and cohesive force of paint amount is not high and, excellent combination property, particularly cohesive force is up to 241N, and this is that similar solvent impregnated resin is unapproachable.
Description
Technical field
The present invention relates to a kind of solvent impregnated resin, specifically relate to a kind of low, Medium-voltage motor solvent-free impregnating resin and curing.
Background technology
In the production process of electromechanics, the dipping of wire loop is a standard operation.The heat that solvent impregnated resin after solidification has mechanical fixed coil, prevents chemical corrosion and reduces environmental influence, removing generates, and the function of electrical isolation is provided.
The heat-resisting solvent-free impregnating resin of H level electrical equipment and electrical coil is indispensable important insulating material during current motor electrical equipment manufactures, and abroad this class solvent impregnated resin is all generally use polyester-imide type, and the domestic phenyl ether that used before 2000 serial more.And the domestic multiplex epoxy polyester type of the solvent-free impregnating resin of F level.The solvent impregnated resin better performances of polyester-imide type, but cost is higher, and technological process is more complicated; The solvent impregnated resin of phenyl ether series due to viscosity poor, produce low-molecular material during solidification, its performance is not high; Unsaturated polyester technique is simple, and can accomplish high temperature resistant, low as solvent impregnated resin viscosity, the usage period is long, but more crisp after solidification, and shrinking percentage is large, easy to crack; The solvent-free impregnating resin of epoxies, material is easy to get, simple process, and electromechanical properties are superior, but thermotolerance is not high.
Application number be CN201110101053.9 patent document discloses a kind of environment-friendly type solvent-free solvent impregnated resin, described solvent impregnated resin, by the parts by weight of each component, comprising: high heat resistant unsaturated polyester resin: 100 weight parts; Modified epoxy 0 ~ 100 weight part; Novel active thinner 50 ~ 200 weight part; Stopper 0.1 ~ 1 weight part; Initiator 1.5 ~ 3.8 weight part; Auxiliary agent 0 ~ 2 weight part.This solvent-free impregnating resin is compared with no-solvent type mesolow solvent impregnated resin conventional at present; In identical workpiece situation, this resin can shorten about 1/3 cure the time, save about 25% energy consumption.But still cannot solve the technical problem that the solvent-free impregnating resin thermotolerance of the epoxies existed at present is not high.
Summary of the invention
The invention provides a kind of low, Medium-voltage motor solvent-free impregnating resin, this resin curing process is good, fugitive constituent is little, excellent storage stability, good heat resistance, cured product physical strength is high, electrical insulation properties good, dielectric loss is little and good flame resistance, can be used for insulating impregnating varnish, insulating encapsulating material field.
A kind of low, Medium-voltage motor solvent-free impregnating resin, by weight percentage, it consists of:
Heat resistant unsaturated polyester resin add the resistance toheat substantially increasing solvent-free impregnating resin, described heat resistant unsaturated polyester resin our company voluntarily manufacture obtains, and two or more polyprotonic acids, at least one polyvalent alcohol polycondensation occur under high temperature or catalyst action and deviates from micromolecular water and the polymkeric substance made.
Described polyprotonic acid is Tetra hydro Phthalic anhydride, MALEIC ANHYDRIDE, m-phthalic acid or fumaric acid.
Described polyvalent alcohol is propylene glycol, glycol ether, three diglycol ethylenes, neopentyl glycol or TriMethylolPropane(TMP).
Described benzoxazine imide resin (formula III), existing method can be utilized during use first to prepare polybenzoxazine resin, namely with benzo 6-membered heterocyclic compound-benzoxazine resin (formula I) that phenolic compound, aminated compounds and formaldehyde are Material synthesis, benzoxazine resin with under heat effect, there is graft polymerization reaction and worth containing the monomer of imine group.Compared with general imide resin, benzoxazine imide resin does not have small molecules to release in forming and hardening process, and goods porosity is low, and shrink close to zero, curing process is good, and the physical strength of the solvent-free impregnating resin prepared is good.
(I) benzoxazine colophony
(II) bismaleimides
(III) benzoxazine imide resin
Wherein R
1, R
2independently be H, alkyl, aryl amine or aryl, such as alkyl can select CH
3cH
2-to wait, aryl can select C
6h
5-, C
6h
4cH
3-etc.R is
deng
The described monomer containing imine group is bismaleimides (formula II) or 4,4-dimethyl diphenyl methane.
Described epoxy resin is one or more in bisphenol A type epoxy resin (E44, E51 that Shanghai Yuan Bang Manufacturing Co., Ltd or Ba Ling petrochemical industry epoxy resin division department provide), novolac epoxy (F51, F44 that Ba Ling petrochemical industry epoxy resin division department or Jiangsu Miki Group provide).
Described initiator is one or more in benzoyl peroxide, dicumyl peroxide.
Described reactive thinner is preferably one or more the mixture in vinylbenzene, Vinyl toluene, diallyphthalate acid esters.
Described solidifying agent is that anhydrides, boron amide class, imidazoles, triphenylphosphine are Ji one or more mixture of Qi phosphonium salt.Such as conventional solidifying agent comprise in tung oil acid anhydride, phenylimidazole, methyl hexahydrophthalic anhydride one or more.
Described curing catalyst is one or more mixture of metal salt of organic carboxylic acid, acetyl acetone salt.Such as, preferred curing catalyst is aluminium acetylacetonate or cobalt naphthenate etc.Or curing catalyst selects the mixture of aluminium acetylacetonate and three-(dimethylamino methyl) phenol.
The preparation method of above-mentioned benzoxazine imide resin modified heat resistant unsaturated polyester solvent-free impregnating resin is: by formula, each component is mixed and obtain described low, Medium-voltage motor solvent-free impregnating resin.
Present invention also offers a kind of curing of above-mentioned low, Medium-voltage motor solvent-free impregnating resin, use that this is low, Medium-voltage motor solvent-free impregnating resin time, can need selection impregnation technology according to concrete, impregnation technology should be well known in the art, is not described in detail in this.Preferred condition of cure for solidify 4-8 hour between 135-150 DEG C.
Compared with prior art, beneficial effect of the present invention is embodied in:
(1) the present invention adopts in epoxy unsaturated polyester system, introduces benzoxazine imide resin ring reticulated structure, system itself has good consistency and matching, and there is the advantage that unsaturated polyester-epoxy resin-benzoxazine imide resin three individual system is synchronously solidified, be equipped with high performance solidifying agent and auxiliary agent again, make to release without small molecules in its solidification process, solvent impregnated resin is made to have solidification fugitive constituent little, excellent storage stability, cohesive strength high (exceeding 65% of industry standard), heat radiation and good heat resistance, cured product physical strength is high, electrical insulation properties is good, dielectric loss is little, the features such as good flame resistance, and have good adhesiveproperties with insulated wire, and without verdigris phenomenon.
(2) during actual use, each component is mixed the solvent impregnated resin that can obtain high bond strength of the present invention, simple and the composition good stability of its manufacturing process, what be applicable to the vacuum pressure impregnation of H, C level large and medium-sized low, Medium-voltage motor, specific type of electric machine, electrical equipment winding and special heat resisting motor immerses insulation impregnating process.Be applicable to the electrical equipment and electrical of various temperature resistant grade simultaneously, be also applicable to that vat immerses, immerses continuously, VPI impregnation technology, rotary roasting etc. processing requirement.
(3) present invention employs benzoxazine imide resin and synthesize the imine modified unsaturated solvent-free impregnating resin of benzoxazine, improve the thermotolerance of solvent impregnated resin, the thermotolerance of epoxy unsaturated polyester is made to rise to the thermal level of polyester-imide, be equipped with high-performance solidifying agent, ensure that this solvent impregnated resin overcomes the conventional solventfree resin shelf lives short, hot surface drying is poor, shrinking percentage is large, hang the shortcomings such as the low and cohesive force of paint amount is not high and, excellent combination property, particularly cohesive force (spiral winding method) is up to 241N, this is that similar solvent impregnated resin is unapproachable.
Embodiment
Below in conjunction with specific embodiment, the present invention will be described in detail.
Below in each embodiment, heat resisting unsaturated polyester, benzoxazine imide resin have all selected the product of Haining Yongcheng Insulation Materials Co., Ltd.'s autonomous production (following involved " part " is weight part).
Prepared by heat resisting unsaturated polyester:
Neopentyl glycol 30 parts, glycol ether 20 parts, m-phthalic acid 25 parts, MALEIC ANHYDRIDE 12 parts, Tetra hydro Phthalic anhydride 18 parts are less than 15mgKOH/g at 180 ~ 220 DEG C of reaction acid numbers, and Dehydration obtains heat resisting unsaturated polyester.
Prepared by benzoxazine imide resin:
(1) salt acid for adjusting pH value to 2 is used by after phenol 37 parts and the mixing of 35 parts, formaldehyde, temperature rising reflux 2h, pH to 8-9 is regulated again with sodium hydroxide, add toluene 50 parts and 11 parts, formaldehyde again, drop into 4 in batches, to terminal (terminal point determining condition is: molding time is 4-5min/170 DEG C, the little skill in using a kitchen knife in cookery), vacuum is obtained benzoxazine colophony after pumping solvent for 4-diaminodiphenylmethane 17 parts insulation back flow reaction.
(2) in other reactor, dimethyl formamide 25 parts is added, be warmed up to 100-110 DEG C and add 4, 4-diaminodiphenylmethane 10 parts and bismaleimides 15 parts, stirring and dissolving, and at 100-110 DEG C of insulation reaction 1-2h, (terminal point determining condition is: molding time is 2.5-3.5min/180 DEG C to terminal, the little skill in using a kitchen knife in cookery), add benzoxazine colophony 50 parts, continue at 100-110 DEG C, react to terminal that (terminal point determining condition is: molding time is 1.5-2.0min/180 DEG C, the little skill in using a kitchen knife in cookery) add thinner toluene 20 parts, i.e. obtained benzoxazine imide resin.
Embodiment 1
According to the formula that is low, Medium-voltage motor solvent-free impregnating resin of the present embodiment be:
Heat resisting unsaturated polyester 60g, benzoxazine imide resin 10g, bisphenol A epoxide resin (E44) 5g, novolac epoxy (F44) 5g, initiator are dicumyl peroxide (DCP) 1.0 grams, reactive thinner is diallyphthalate acid esters (DAP) 10 grams, solidifying agent is tung oil acid anhydride 10 grams, promotor cobalt naphthenate 0.2g.
After above-mentioned each component is mixed by formula, i.e. obtained low, Medium-voltage motor solvent-free impregnating resin.This solvent impregnated resin in use, should about 145 DEG C curing reactions 5 hours, i.e. curable film-forming.
Embodiment 2
According to the formula that is low, Medium-voltage motor solvent-free impregnating resin of the present embodiment be:
Heat resisting unsaturated polyester 50g, benzoxazine imide resin 10g, novolac epoxy 15g, initiator are benzoyl peroxide (BPO) 2.0g, reactive thinner is vinylbenzene (ST) 15g, solidifying agent is phenylimidazole 7.0g, promotor aluminium acetylacetonate 0.4g.
After above-mentioned each component is mixed by formula, i.e. obtained low, Medium-voltage motor solvent-free impregnating resin.This solvent impregnated resin in use, should about 145 DEG C curing reactions 5 hours, i.e. curable film-forming.
Embodiment 3
According to the formula that is low, Medium-voltage motor solvent-free impregnating resin of the present embodiment be:
Heat resisting unsaturated polyester 45g, benzoxazine imide resin 7g, bisphenol A epoxide resin 10g, novolac epoxy 5g, initiator are dicumyl peroxide (DCP) 1.0 grams, reactive thinner is Vinyl toluene 10 grams, solidifying agent is tung oil acid anhydride 20 grams, promotor aluminium acetylacetonate 0.4g.
After above-mentioned each component is mixed by formula, namely obtained low in, Medium-voltage Motor solvent-free impregnating resin.This solvent impregnated resin in use, should about 145 DEG C curing reactions 5 hours, i.e. curable film-forming.
Embodiment 4
According to the formula that is low, Medium-voltage motor solvent-free impregnating resin of the present embodiment be:
Heat resisting unsaturated polyester 40 grams, benzoxazine imide resin 10g, bisphenol A epoxide resin 15g, initiator are benzoyl peroxide (BPO) 2.0 grams, reactive thinner is Vinyl toluene 13 grams, solidifying agent is methyl hexahydrophthalic anhydride 20 grams, promotor is aluminium acetylacetonate 0.2g and three-(dimethylamino methyl) phenol 0.1g.
After above-mentioned each component is mixed by formula, i.e. obtained low, Medium-voltage motor solvent-free impregnating resin.This solvent impregnated resin in use, should about 145 DEG C curing reactions 5 hours, i.e. curable film-forming.
In sum, after each component being mixed by formula, obtain solvent-free impregnating resin of the present invention, this is low, Medium-voltage motor solvent-free impregnating resin manufacturing process is simple, form good stability, stability in storage is good.
Prepare resin and domestic conventional resins (CH1150-VA) and imported from America product (DolphonCC1105) by embodiment 1 and carry out Performance Detection, detected result is in table 1
Table 1
As shown in Table 1, Solvent-Impregnated Resins of the present invention in epoxide modified heat resisting unsaturated polyester system, introduces benzoxazine imide resin ring reticulated structure compared with the solvent-free impregnating resin of domestic epoxy-unsaturated polyester type general at present, its thermotolerance is higher, reach H-C level, and domestic general epoxy polyester type can only reach F-H level, and over-all properties is better.Meanwhile, Solvent-Impregnated Resins of the present invention 319H of the present invention is compared with external similar polyester-imide solvent-free impregnating resin, and performance reaches completely and exceeded same kind of products at abroad,
In addition, in order to prove the beneficial effect of low, Medium-voltage motor solvent-free impregnating resin of the present invention, the performance that is low, Medium-voltage motor solvent-free impregnating resin of embodiment 1 ~ 4 being tested according to the corresponding national standard of insullac, the results are shown in Table 2.
Table 2 is low, the performance test data of Medium-voltage motor solvent-free impregnating resin
As shown in Table 2, low, Medium-voltage motor solvent-free impregnating resin excellent storage stability of the present invention; Carry out low, Medium-voltage motor, the electrical equipment winding of insulation impregnating process with solvent-free impregnating resin of the present invention, its cohesive strength high (exceeding 65% of industry standard), good insulation preformance, physical strength are high.
Claims (4)
1. low, a Medium-voltage motor solvent-free impregnating resin, is characterized in that, by weight percentage, it consists of:
Described epoxy resin is one or more in bisphenol A type epoxy resin, novolac epoxy;
Under heat effect, graft polymerization reaction is there is with the monomer containing imine group and obtains in described benzoxazine imide resin with benzoxazine colophony; The described monomer containing imine group is bismaleimides;
Described solidifying agent is one or more in tung oil acid anhydride, phenylimidazole, methyl hexahydrophthalic anhydride;
Described curing catalyst is aluminium acetylacetonate or cobalt naphthenate; Or described curing catalyst is the mixture of aluminium acetylacetonate and three-(dimethylamino methyl) phenol;
Described heat resistant unsaturated polyester resin is deviate from by two or more polyprotonic acids, at least one polyvalent alcohol generation polycondensation the polymkeric substance that micromolecular water is made;
Described polyprotonic acid is Tetra hydro Phthalic anhydride, MALEIC ANHYDRIDE, m-phthalic acid or fumaric acid;
Described polyvalent alcohol is propylene glycol, glycol ether, three diglycol ethylenes, neopentyl glycol or TriMethylolPropane(TMP).
2. low, Medium-voltage motor solvent-free impregnating resin according to claim 1, is characterized in that, described initiator is one or both in benzoyl peroxide, dicumyl peroxide.
3. low, Medium-voltage motor solvent-free impregnating resin according to claim 1, is characterized in that, described reactive thinner is one or more in vinylbenzene, Vinyl toluene, Phthalic acid, diallyl ester.
4. the curing of a solvent-free impregnating resin, it is characterized in that, described solvent-free impregnating resin is low, the Medium-voltage motor solvent-free impregnating resin described in the arbitrary claim of claim 1-3, and condition of cure is: between 135-150 DEG C, solidify 4-8 hour.
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| CN104263203A (en) * | 2014-10-09 | 2015-01-07 | 六安市微特电机有限责任公司 | Water-resistant and waterproof solvent-free impregnating varnish and preparation method thereof |
| CN105086735A (en) * | 2014-12-19 | 2015-11-25 | 赵雅珺 | Enameled wire insulation varnish |
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| CN107353643B (en) * | 2017-07-11 | 2019-09-03 | 苏州生益科技有限公司 | A kind of resin combination and prepreg, metal foil laminate and interlayer dielectric using its production |
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| CN107384130B (en) * | 2017-08-18 | 2019-06-21 | 株洲时代新材料科技股份有限公司 | A kind of impregnating resin composition and its application |
| CN111440518B (en) * | 2020-04-26 | 2021-08-17 | 山西博拉哲绝缘技术有限公司 | High-heat-resistance environment-friendly refrigerant-resistant insulating impregnating resin and preparation method thereof |
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