JP2010275355A - Thermosetting resin composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thermosetting resin composition that has good adhesion to a self-lubricating enamelled wire having a lubricating layer which contains lubricant. <P>SOLUTION: This thermosetting resin composition for firmly adhering coils includes: a polymer component (A) having at least two polymerizable substituent groups; a compound (B) having at least one polymerizable substituent group; a compound (C) having an ≥8C hydrocarbon group; and a polymerization initiator (D). <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a thermosetting resin composition having excellent impregnation properties and excellent adhesion to a self-lubricating enameled wire having a lubricating layer containing a lubricant, and particularly for electrical insulation and fixing of electric devices such as motors. The present invention relates to a suitable thermosetting resin composition.

  An electric device coil of a rotating machine such as a motor is treated with a thermosetting resin composition for the purpose of electrical insulation, heat dissipation during operation, absorption of roaring sound generated by electric vibration, fixation of constituent materials, and the like. As thermosetting resin materials capable of exhibiting such functions, unsaturated polyester resins, epoxy resins and the like are mainly used. Among these, unsaturated polyester resins are widely used because of their excellent balance of curability, air drying, adhesion, electrical insulation, economy and the like.

  Self-lubricating enamel with a lubricant layer on the surface of the coil of electrical equipment to cope with the improvement of coil space factor and the speed of winding work by miniaturization and high performance of electrical equipment in recent years In Patent Document 1, polyethylene wax is used as a lubricant, and in Patent Document 2, a long-chain ester is used as a lubricant. For this reason, it is known that the conventional unsaturated polyester resin varnish has poor wettability when the electric device coil is fixed, and the adhesive strength after curing may be lower than that of other enamel wires. Patent Documents 3 and 4 are examples in which the adhesion to the enamel wire is improved by improving the unsaturated polyester varnish.

  In Patent Document 3, a resin composition comprising a reaction product of an epoxy acrylate and a glycidyl ester of a fatty acid, styrene and a (meth) acrylate of a polyhydric alcohol is used for the purpose of preventing a decrease in adhesive force due to volatilization of styrene during high temperature curing. Although shown, since many ether bonds and ester bonds are included, it is expected that the effect of improving wettability and adhesiveness to the self-lubricating enamel wire is low.

  Patent Document 4 discloses a resin composition containing a silicone compound for the purpose of improving adhesion to a self-lubricating enameled wire, but an increase in the viscosity of the resin composition is expected.

JP 2008-16397 A JP 7-216226 A JP 61-248307 A JP-A-60-72967

  An object of this invention is to provide the thermosetting resin composition which shows favorable adhesive force with respect to the self-lubricating enamel wire which has a lubricating layer containing a lubricating material.

  As a result of intensive research aimed at achieving the above object, the present inventors have found that it is good for self-lubricating enamel wires having a lubricating layer containing a lubricant by adding a compound having a hydrocarbon group having 8 or more carbon atoms. The present invention was completed by finding that a thermosetting resin composition exhibiting a good adhesive force can be obtained.

That is, the present invention includes the following inventions.
(1) (A) a polymer component having two or more polymerizable substituents, (B) a compound having one or more polymerizable substituents, and (C) a compound having a hydrocarbon group having 8 or more carbon atoms, (D) The thermosetting resin composition for coil fixation containing a polymerization initiator.
(2) The thermosetting resin composition for fixing a coil according to (1), wherein the polymerizable substituent in the component (A) and the component (B) is a group containing an ethylenically unsaturated bond.
(3) The thermosetting resin composition for fixing a coil according to (1) or (2), wherein the component (A) is an unsaturated polyester resin.

(4) The thermosetting resin composition for fixing a coil according to any one of (1) to (3), wherein the component (C) is a compound having a linear aliphatic group having 8 or more carbon atoms.
(5) The thermosetting resin composition for fixing a coil according to any one of (1) to (4), wherein the component (C) is a compound having an ethylenically unsaturated bond.
(6) The thermosetting resin composition for fixing a coil according to any one of (1) to (5), wherein the component (C) is an ester of a higher alcohol and (meth) acrylic acid.

(7) The blending amount of the component (C) is 0.01 to 20.0 parts by weight with respect to 100 parts by weight of the total amount of the components (A) and (B). The thermosetting resin composition for coil fixation in any one.
(8) The thermosetting resin composition for fixing a coil according to any one of (1) to (7), wherein the component (D) is a polymerization initiator having radical polymerization ability.

(9) The thermosetting resin composition for fixing a coil according to any one of (1) to (8), wherein the viscosity at 25 ° C. is 0.01 to 20 Pa · s.
(10) An electric device having a magnetic core and a conductive wire wound around the magnetic core, and being insulated with a cured product of the thermosetting resin composition according to any one of (1) to (9) Coil.
(11) An electric device comprising the coil for an electric device according to (10).

  According to the present invention, there is provided a thermosetting resin composition exhibiting good adhesion to a self-lubricating enameled wire having a lubricating layer containing a lubricant.

It is a figure which shows typically the coil for electric equipments fixed using the thermosetting resin composition of this invention. It is a figure which shows typically the structure of a rotary electric machine as an example of an electric equipment.

Hereinafter, the present invention will be described in detail.
(A) Component The component (A) used in the present invention, that is, the polymer component having two or more polymerizable substituents is usually a compound having a number average molecular weight of 1000 or more, preferably a number average molecular weight of 1000 to 5000. It is this compound. Moreover, it is preferable to have a group containing an ethylenically unsaturated bond as the polymerizable substituent. An ethylenically unsaturated bond means a carbon-carbon double bond having polymerizability.

  As the component (A), at least one selected from the group consisting of an unsaturated polyester resin and a polyester (meth) acrylate resin can be used, and an unsaturated polyester resin is preferably used.

  The unsaturated polyester resin is not particularly limited, and for example, one obtained by subjecting a dibasic acid and a polyhydric alcohol to a condensation reaction can be used.

  Examples of the dibasic acid used as a raw material for the unsaturated polyester resin include α, β-unsaturated dibasic acids such as maleic acid, maleic anhydride, fumaric acid, itaconic acid and itaconic anhydride; and phthalic acid, Phthalic anhydride, halogenated phthalic anhydride, isophthalic acid, terephthalic acid, tetrahydrophthalic acid, tetrahydrophthalic anhydride, hexahydrophthalic acid, hexahydroisophthalic acid, hexahydroterephthalic acid, cyclopentadiene-maleic anhydride adduct, succinic acid Acid, malonic acid, glutaric acid, adipic acid, sebacic acid, 1,10-decanedicarboxylic acid, 2,6-naphthalenedicarboxylic acid, 2,7-naphthalenedicarboxylic acid, 2,3-naphthalenedicarboxylic acid, 2,3- Naphthalenedicarboxylic anhydride, 4,4'-biphenyldicarboxylic acid, In addition, saturated dibasic acids such as these dialkyl esters are exemplified, but the invention is not particularly limited. Only one kind of these dibasic acids may be used, or two or more kinds may be appropriately mixed and used.

  Examples of the polyhydric alcohol used as a raw material for the unsaturated polyester resin include ethylene glycols such as ethylene glycol, diethylene glycol and polyethylene glycol, propylene glycols such as propylene glycol, dipropylene glycol and polypropylene glycol, 2-methyl-1 , 3-propanediol, 1,3-butanediol, bisphenol A, adducts of bisphenol A and propylene oxide or ethylene oxide, glycerin, trimethylolpropane, 1,3-propanediol, 1,2-cyclohexane glycol, 1, 3-cyclohexane glycol, 1,4-cyclohexane glycol, para-xylene glycol, bicyclohexyl-4,4'-diol, 2,6-decalin glycol Tris (2-hydroxyethyl) isocyanurate and the like although not limited in particular. In addition, amino alcohols such as ethanolamine may be used. Only one kind of these polyhydric alcohols may be used, or two or more kinds may be appropriately mixed and used. If necessary, modification with epoxy resin, diisocyanate, dicyclopentadiene or the like may be performed.

  Specific examples of the unsaturated polyester resin include an unsaturated polyester resin containing a bisphenol A skeleton, for example, an unsaturated polyester resin obtained by condensation reaction of bisphenol A, ethylene glycol and maleic acid, and an unsaturated polyester resin containing an isophthalic acid skeleton. A saturated polyester resin, for example, an unsaturated polyester resin obtained by a condensation reaction of isophthalic acid, ethylene glycol, and maleic acid.

  Moreover, polyester (meth) acrylate resin is not specifically limited, For example, what is obtained by making a (meth) acryl compound react with the terminal of unsaturated or saturated polyester can be used. Here, as the raw material of the polyester, for example, compounds similar to the compounds exemplified as the raw material of the unsaturated polyester resin can be used.

  Examples of the (meth) acrylic compound used as a raw material for the polyester (meth) acrylate resin include unsaturated monobasic acids such as unsaturated glycidyl compounds and (meth) acrylic acid, and glycidyl esters thereof. It is not limited. Only one kind of these (meth) acrylic compounds may be used, or two or more kinds may be appropriately mixed and used.

  The blending conditions of each raw material when obtaining these synthetic resins, that is, resins such as unsaturated polyester resins and polyester (meth) acrylate resins, are particularly limited as long as they are appropriately adjusted according to the physical properties of the desired resins. It is not something.

(B) component (B) component used for this invention, ie, the compound which has 1 or more of polymerizable substituents, should just be suitably selected according to a use purpose, a use, etc., Although it does not specifically limit, Those having a group containing an ethylenically unsaturated bond as the polymerizable substituent are preferred. Specific examples include styrene, vinyl toluene, divinyl benzene, α-methyl styrene, (meth) acrylic acid ester, vinyl acetate, vinyl ester, diallyl phthalate and the like. Preferably, styrene, vinyl ester, (meth) acrylic acid ester (for example, methacrylate, acrylate) is used. These may use only 1 type and may mix and use 2 or more types suitably.

  The vinyl ester is not particularly limited, and for example, those obtained by reacting an epoxy compound and an unsaturated monobasic acid using an esterification catalyst can be used.

  The epoxy compound used as a raw material for the vinyl ester is a compound having at least two epoxy groups in the molecule and is not particularly limited. For example, a condensation reaction of bisphenols such as bisphenol A and epihalohydrin. And glycidyl ether type epoxy resin obtained by condensation reaction of 4,4'-biphenol, hydrogenated bisphenol and glycols with epihalohydrin. Only one kind of these epoxy compounds may be used, or two or more kinds may be appropriately mixed and used.

  Although it does not specifically limit as an unsaturated monobasic acid used as a raw material of vinyl ester, For example, acrylic acid, methacrylic acid, crotonic acid etc. are mentioned. These unsaturated monobasic acids may be used alone or in a suitable mixture of two or more.

  Examples of (meth) acrylic acid esters include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, isooctyl (meth) acrylate, and isodecyl. (Meth) acrylate, phenyl (meth) acrylate, cyclohexyl (meth) acrylate, dicyclopentanyl (meth) acrylate, dicyclopentenyl (meth) acrylate, isobornyl (meth) acrylate, methoxylated cyclotriene (meth) acrylate, di Cyclopentenyloxyethyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate 4-hydroxybutyl (meth) acrylate, polyethylene glycol (meth) acrylate, alkyloxypolypropylene glycol (meth) acrylate, tetrahydrofurfuryl (meth) acrylate, 2-hydroxy-3-phenoxypropyl (meth) acrylate, glycidyl ( (Meth) acrylate, caprolactone modified tetrafurfuryl (meth) acrylate, ethoxycarbonylmethyl (meth) acrylate, phenol ethylene oxide modified acrylate, paracumylphenol ethyleneoxy modified acrylate, nonylphenol ethylene oxide modified acrylate, nonylphenol polypropylene oxide modified acrylate, 2-ethylhexylcarbi Tall acrylate, polyglycerol di (meth) acrylate Rate, polybutylene glycol di (meth) acrylate, 1,4-butanediol (meth) acrylate, 1,6 hexanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, trimethylolpropane tri (meth) acrylate Acrylonitrile butadiene methacrylate, dicyclopentenyloxyethyl methacrylate, and the like.

  The weight ratio (A) / (B) between the component (A) and the component (B) is preferably 80/20 to 1/99, more preferably 60/40 to 5/95. When the weight ratio of the component (A) is 80 or less, the viscosity does not become too high, and it is easy to apply to a coil or the like, so that the handleability is excellent. On the other hand, if it is 1 or more, the curability of the cured resin can be maintained and the heat resistance can be maintained.

Component (C) Component (C) used in the present invention, that is, a compound having a hydrocarbon group having 8 or more carbon atoms, includes polyethylene wax, partially oxidized polyethylene wax, higher fatty acid ester, higher alcohol and (meth) acrylic acid. Examples include esters obtained and styrene derivatives having a linear aliphatic group. Preferably, higher alcohol and (meth) acrylic acid esters are used. These may use only 1 type and may mix and use 2 or more types suitably.

The higher fatty acid ester is a monobasic acid having a hydrocarbon group having 12 or more carbon atoms, preferably an ester composed of an unsaturated monobasic acid and an alcohol, and as the monobasic acid having a hydrocarbon group having 12 or more carbon atoms, Examples thereof include lauric acid, palmitic acid, stearic acid, oleic acid, and linoleic acid. Only one kind of these monobasic acids may be used, or two or more kinds may be appropriately mixed and used. Specific examples of the alcohol include methanol, ethanol, butanol, dodecanol, hexadecanol, and the like. These alcohols may be used alone or in combination of two or more. Also good.
Naturally derived higher fatty acid esters such as carnauba wax and beeswax may also be used.

  The higher alcohol used as a raw material for the higher alcohol and (meth) acrylic acid ester is a monohydric alcohol having 8 or more carbon atoms, preferably 8 to 25 carbon atoms, such as octanol, decanol, dodecanol, octadecanol, etc. Monohydric alcohol having 8 to 18 carbon atoms. Only one kind of these alcohols may be used, or two or more kinds may be appropriately mixed and used. Specific examples of the ester of higher alcohol and (meth) acrylic acid include octyl acrylate, octyl methacrylate, decyl acrylate, decyl methacrylate, dodecyl acrylate, dodecyl methacrylate, octadecyl acrylate, and octadecyl methacrylate.

Examples of the styrene derivative having a linear aliphatic group include styrene derivatives having a linear aliphatic group having 8 or more carbon atoms, preferably 10 to 18 carbon atoms, and preferably a saturated linear aliphatic group. For example, C _8-18 alkyloxy-C _1-4 alkyl styrene such as octyloxymethyl styrene, decyloxymethyl styrene, and dodecyloxymethyl styrene can be used.

  (C) The compounding quantity of component is 0.01-20.0 weight part normally with respect to 100 weight part of total amounts of (A) component and (B) component, Preferably it is 0.1-10 weight part. . By making the blending amount of component (C) 0.01 parts by weight or more, the adhesive force can be sufficiently improved, and by making it 20.0 parts by weight or less, viscosity increase and phase separation are prevented and handled. Becomes easier.

Component (D) Component (D) in the present invention, that is, the polymerization initiator is not particularly limited, but at least one selected from the group consisting of a living polymerization initiator, an organic peroxide, and an organic azo compound may be used. it can.

（式中、Ｚ^１、Ｚ^２およびＺ^３は、互いに独立に、Ｒ^１またはＯＲ^１であり、但し、Ｚ^１、Ｚ^２およびＺ^３のうち少なくとも１つはＲ^１であり、Ｒ^１は、水素、アルキル基、シクロアルキル基、アラルキル基またはアリール基である）
で示されるホウ素化合物や、下式（２）： As a living polymerization initiator, the following formula (1):

Wherein Z ¹ , Z ² and Z ³ are independently of each other R ¹ or OR ¹ , provided that at least one of Z ¹ , Z ² and Z ³ is R ¹ and R ¹ is , Hydrogen, alkyl group, cycloalkyl group, aralkyl group or aryl group)
Or a boron compound represented by the following formula (2):

（式中、Ｒ^２は、水素またはアルキル基であり、Ｒ^３およびＲ^４は、互いに独立に、アルキル基、シクロアルキル基またはアルキレン基であり、Ｘは、アルキル基、シクロアルキル基、アリール基またはアルコキシカルボニル基であり、Ｙは、アルキル基、シクロアルキル基、アリール基、アルコキシ基またはアシルオキシ基である）
で示されるアルコキシアミン誘導体や原子移動ラジカル重合試剤が挙げられる。

Wherein R ² is hydrogen or an alkyl group, R ³ and R ⁴ are each independently an alkyl group, a cycloalkyl group or an alkylene group, and X is an alkyl group, a cycloalkyl group or an aryl group. Or an alkoxycarbonyl group, and Y is an alkyl group, a cycloalkyl group, an aryl group, an alkoxy group or an acyloxy group)
And an amine transfer radical polymerization reagent.

  In the above formulas (1) and (2), the alkyl group is preferably an alkyl group having 1 to 6 carbon atoms, the cycloalkyl group is preferably a cycloalkyl group having 3 to 12 carbon atoms, and the alkylene group is The aryl group is preferably an aryl group having 6 to 12 carbon atoms, such as a phenyl group, and the alkoxy group is preferably an alkoxy group having 1 to 6 carbon atoms. And the acyloxy group is preferably an acyloxy group having 1 to 6 carbon atoms.

  Examples of organic peroxides include benzoyl peroxide, lauroyl peroxide, tertiary butyl peroxide benzoate, tertiary amyl peroxide benzoate, tertiary amyl peroxyneodecanoate, tertiary butyl peroxyneodecanoate, and tarsia. Liamyl peroxybutyrate, ditertiary butyl peroxide, dicumyl peroxide, cumene hydroperoxide, 1,1-di (tertiary butyl peroxy) cyclohexane, 2,2-di (tertiary butyl peroxy) butane, tertiary butyl hydroperoxide However, it is not particularly limited. These may use only 1 type and may mix and use 2 or more types suitably.

  Examples of organic azo compounds include 2,2'-azobis (2,4-dimethylvaleronitrile), 2,2'-azobis (2-methylpropionitrile), 1,1'-azobis (cyclohexane-1-carbonitrile ), 2,2'-azobis [N- (2-propenyl) -2-methylpropionamide], dimethyl 2,2'-azobis (2-methylpropionate), etc. is not. These may use only 1 type and may mix and use 2 or more types suitably.

Other optional components A curing accelerator may be added to the thermosetting resin composition of the present invention as necessary in order to accelerate curing as other optional components. Examples of the curing accelerator include metal salts of naphthenic acid or octylic acid (metal salts of cobalt, zinc, zirconium, manganese, calcium, etc.). These may be used alone or in appropriate combination of two or more. May be. Moreover, a polymerization inhibitor can be mix | blended as needed. Examples of the polymerization inhibitor include quinones such as hydroquinone, paratertiary butylcatechol, and pyrogallol, and these may be used alone or in admixture of two or more.

Manufacturing method of thermosetting raw resin composition Although the manufacturing method in particular of the thermosetting resin composition of this invention is not restrict | limited, For example, it can manufacture as follows. First, the component (A), the component (B), the component (C), and optionally other optional components are stirred at room temperature (25 ° C.) or warmed and mixed uniformly. The temperature range for heating depends on the viscosity and melting point of the component (A), the component (B) and the component (C), but is usually preferably 40 to 80 ° C. Further, when stirring and mixing, a stirrer may be used as necessary. Thus, after preparing the mixture of (A) component, (B) component, and (C) component, (D) component is added at room temperature (25 degreeC), and it mixes uniformly.

  The thermosetting resin composition of the present invention is usually a liquid rather than a paste, and its viscosity is usually 0.01 to 20 Pa · s, preferably less than 5 Pa · s, preferably 2.5 Pa · s or less. It is.

  The thermosetting resin composition of the present invention can be cured by heating at 110 to 140 ° C. for 1 to 3 hours. The curing temperature is appropriately adjusted according to the application.

  The thermosetting resin composition of the present invention can be used for fixing a coil, particularly for fixing a coil using a self-lubricating enameled wire as a conducting wire. The self-lubricating enameled wire is an enameled wire having a lubricating layer containing a lubricant on the surface. As the lubricant, polyethylene wax and long chain esters are known. The thermosetting resin composition of the present invention is particularly suitable for fixing a coil using a self-lubricating enameled wire having a lubricating layer containing polyethylene wax as a lubricant. In the present invention, the fixing of the coil means fixing a conducting wire to the magnetic core of the coil. The thermosetting resin composition of the present invention has good wettability and high adhesion even to a self-lubricating enameled wire. Further, since the viscosity is low, handling is easy when the coil is fixed.

  When the thermosetting resin composition of the present invention is used for fixing a motor coil or the like, for example, the composition is impregnated in the motor coil or the like by using a dipping method or a drop impregnation method. The impregnation method may be a conventional method and is not particularly limited.

  By fixing the coil using the thermosetting resin composition of the present invention, it is possible to simultaneously insulate the coil for electrical equipment. Therefore, the thermosetting resin composition of the present invention can also be used for electric insulation of the coil. it can.

  Below, the coil for electric equipments fixed using the thermosetting resin composition of this invention is demonstrated using figures. FIG. 1 is a diagram schematically showing a coil for an electric device fixed using the thermosetting resin composition of the present invention. FIG. 2 is a diagram schematically illustrating a configuration of a rotating electrical machine as an example of an electric device.

  As shown in FIG. 1, a self-lubricating enameled wire 2 is wound around a magnetic core 1 made of a metal such as iron to produce a coil. The composition of the present invention is applied to a wound coil using an immersion method, a drop impregnation method, or the like. Thereafter, the composition of the present invention is heat-cured at a predetermined temperature and time to form a cured product 3, and the coil 4 for electric equipment that is insulated using the composition of the present invention is obtained.

  As shown in FIG. 2, the rotating electrical machine 6 includes a cylindrical stator core 7, a rotor core 8 that rotates coaxially inside the stator core 7, and either the stator core 7 or the rotor core 8. It consists of a plurality of coils around which a covered conductor is wound using a plurality of slots 9 formed in the axial direction on one or both sides. The composition of the present invention is applied to the stator coil 10 using an immersion method, a drop impregnation method, or the like. Then, the stator which is heat-cured at a predetermined temperature and time to be insulated with the composition of the present invention is obtained. This stator coil 10 is housed in a housing 11 to form a stator. By assembling the obtained stator, the rotor magnetic core 8 and the rotor composed of the coil by a regular method, the rotating electrical machine 6 using the stator coil 10 fixed and insulated using the composition of the present invention is provided. can get.

  EXAMPLES Next, although an Example demonstrates this invention, this invention is not limited by these Examples.

Example 1
For 100 parts by weight of unsaturated polyester varnish a comprising 50 parts by weight of an unsaturated polyester resin having a bisphenol A skeleton and an ethylene glycol component and a maleic acid component and having a number average molecular weight of 3000 and 50 parts by weight of styrene, 1.6 parts by weight of a 50 wt% solution of 1,1- (ditertiary butyl peroxy) cyclohexane is added to the resin composition to which 0.1 part by weight of wax is added, and the varnish for coil impregnation (thermosetting resin composition for fixing the coil) is added. Thing).

  As the enameled wire coil, a self-lubricating enameled wire having a diameter of 1 mm having a lubricating layer containing polyethylene wax as a lubricant was used, and a helical coil having an inner diameter of 6 mm and a length of 7.5 cm was used.

  The prepared coil was impregnated in the above-described coil impregnation varnish for 5 minutes and then cured at 120 ° C. for 2 hours.

(Example 2)
Octadecyl with respect to 100 parts by weight of unsaturated polyester varnish b comprising 40 parts by weight of unsaturated polyester resin having a bisphenol A skeleton and an ethylene glycol component and a maleic acid component and having a number average molecular weight of 3000 and 60 parts by weight of methacrylate 1.6 parts by weight of a 50 wt% solution of 1,1- (ditertiary butyl peroxy) cyclohexane was added to the resin composition to which 1 part by weight of methacrylate was added to obtain a coil impregnating varnish.

  As the enameled wire coil, a self-lubricating enameled wire having a diameter of 1 mm having a lubricating layer containing polyethylene wax as a lubricant was used, and a helical coil having an inner diameter of 6 mm and a length of 7.5 cm was used.

  The prepared coil was impregnated in the above coil impregnation varnish for 5 minutes and then cured at 130 ° C. for 1 hour.

(Example 3)
Dodecyloxymethyl with respect to 100 parts by weight of unsaturated polyester varnish c comprising 60 parts by weight of unsaturated polyester resin having an isophthalic acid skeleton and having an ethylene glycol component and a maleic acid component and having a number average molecular weight of 3000 and 40 parts by weight of styrene To the resin composition to which 5 parts by weight of styrene was added, 1.6 parts by weight of a 50 wt% solution of 1,1- (ditertiary butylperoxy) cyclohexane was added to obtain a varnish for coil impregnation.

  As the enameled wire coil, a self-lubricating enameled wire having a diameter of 1 mm having a lubricating layer containing polyethylene wax as a lubricant was used, and a helical coil having an inner diameter of 6 mm and a length of 7.5 cm was used.

  The prepared coil was impregnated in the above-described coil impregnation varnish for 5 minutes and then cured at 120 ° C. for 2 hours.

Example 4
Octadecyl methacrylate with respect to 100 parts by weight of unsaturated polyester varnish a comprising 50 parts by weight of unsaturated polyester resin containing bisphenol A skeleton and having an ethylene glycol component and a maleic acid component and having a number average molecular weight of 3000 and 50 parts by weight of styrene To the resin composition to which 1 part by weight was added, 0.35 part by weight of diethylmethoxyborane was added to obtain a varnish for coil impregnation.

  As the enameled wire coil, a self-lubricating enameled wire having a diameter of 1 mm having a lubricating layer containing polyethylene wax as a lubricant was used, and a helical coil having an inner diameter of 6 mm and a length of 7.5 cm was used.

  The prepared coil was impregnated in the above coil impregnating varnish for 2 minutes and then cured at 120 ° C. for 2 hours.

(Comparative Example 1)
To 100 parts by weight of an unsaturated polyester varnish a comprising 50 parts by weight of an unsaturated polyester resin containing a bisphenol A skeleton and containing an ethylene glycol component and a maleic acid component and having a number average molecular weight of 3000 and 50 parts by weight of styrene, 1.6 parts by weight of a 50 wt% solution of 1- (ditertiary butyl peroxy) cyclohexane was added to obtain a varnish for coil impregnation.

  As the enameled wire coil, a self-lubricating enameled wire having a diameter of 1 mm having a lubricating layer containing polyethylene wax as a lubricant was used, and a helical coil having an inner diameter of 6 mm and a length of 7.5 cm was used.

  The prepared coil was impregnated in the above-described coil impregnation varnish for 5 minutes and then cured at 120 ° C. for 2 hours.

(Comparative Example 2)
For 100 parts by weight of unsaturated polyester varnish b consisting of 40 parts by weight of unsaturated polyester resin containing bisphenol A skeleton and having an ethylene glycol component and a maleic acid component and having a number average molecular weight of 3000 and 60 parts by weight of methacrylate. , 1- (ditertiary butylperoxy) cyclohexane 50 wt% solution 1.6 weight part was added, and it was set as the varnish for coil impregnation.

  As the enameled wire coil, a self-lubricating enameled wire having a diameter of 1 mm having a lubricating layer containing polyethylene wax as a lubricant was used, and a helical coil having an inner diameter of 6 mm and a length of 7.5 cm was used.

  The prepared coil was impregnated in the above coil impregnation varnish for 5 minutes and then cured at 130 ° C. for 1 hour.

(Comparative Example 3)
For 100 parts by weight of unsaturated polyester varnish c comprising 60 parts by weight of unsaturated polyester resin having an isophthalic acid skeleton and having an ethylene glycol component and a maleic acid component and having a number average molecular weight of 3000 and 40 parts by weight of styrene, 1.6 parts by weight of a 50 wt% solution of 1- (ditertiary butyl peroxy) cyclohexane was added to obtain a varnish for coil impregnation.

  As the enameled wire coil, a self-lubricating enameled wire having a diameter of 1 mm having a lubricating layer containing polyethylene wax as a lubricant was used, and a helical coil having an inner diameter of 6 mm and a length of 7.5 cm was used.

  The prepared coil was impregnated in the above-described coil impregnation varnish for 5 minutes and then cured at 120 ° C. for 2 hours.

(Comparative Example 4)
For 100 parts by weight of unsaturated polyester varnish a comprising 50 parts by weight of unsaturated polyester resin containing bisphenol A skeleton and having an ethylene glycol component and a maleic acid component and having a number average molecular weight of 3000 and 50 parts by weight of styrene, diethyl 0.35 parts by weight of methoxyborane was added to make a varnish for coil impregnation.

  As the enameled wire coil, a self-lubricating enameled wire having a diameter of 1 mm having a lubricating layer containing polyethylene wax as a lubricant was used, and a helical coil having an inner diameter of 6 mm and a length of 7.5 cm was used.

  The prepared coil was impregnated in the above coil impregnating varnish for 2 minutes and then cured at 120 ° C. for 2 hours.

(Test Example 1)
An adhesion force test (JIS C2103) against bending of the obtained coil was performed to measure the helical coil adhesive force. The results are shown in Table 1.

(Test Example 2)
The resin-fixed coil obtained in Example 2 and the resin-fixed coil obtained in Comparative Example 2 were cut, and the resin filling property inside the coil was visually observed. As a result, the coil treated with the thermosetting resin composition of Example 2 was filled with resin to the inside, but the coil treated with the thermosetting resin composition of Comparative Example 2 was not filled with resin. Sufficient spots were observed.

1: Magnetic core, 2: Self-lubricating enameled wire, 3: Hardened material, 4: Coil for electric equipment, 6: Rotating electric machine, 7: Stator magnetic core 7, 8: Rotor magnetic core, 9: Slot, 10: Stator Coil, 11: Housing

Claims (11)

  (A) a polymer component having two or more polymerizable substituents, (B) a compound having one or more polymerizable substituents, (C) a compound having a hydrocarbon group having 8 or more carbon atoms, and (D) A thermosetting resin composition for fixing a coil, comprising a polymerization initiator.   The thermosetting resin composition for fixing a coil according to claim 1, wherein the polymerizable substituent in the component (A) and the component (B) is a group containing an ethylenically unsaturated bond.   The thermosetting resin composition for coil fixation according to claim 1 or 2, wherein the component (A) is an unsaturated polyester resin.   (C) The thermosetting resin composition for coil fixation of any one of Claims 1-3 whose component is a compound which has a C8 or more linear aliphatic group.   The thermosetting resin composition for coil fixation according to any one of claims 1 to 4, wherein the component (C) is a compound having an ethylenically unsaturated bond.   The thermosetting resin composition for coil fixation according to any one of claims 1 to 5, wherein the component (C) is an ester of a higher alcohol and (meth) acrylic acid.   (C) The compounding quantity of a component is 0.01-20.0 weight part with respect to 100 weight part of total amounts of (A) component and (B) component, In any one of Claims 1-6 The thermosetting resin composition for coil fixation as described.   The thermosetting resin composition for coil fixation according to any one of claims 1 to 7, wherein the component (D) is a polymerization initiator having radical polymerization ability.   The thermosetting resin composition for fixing a coil according to any one of claims 1 to 8, wherein the viscosity at 25 ° C is 0.01 to 20 Pa · s.   A coil for an electric device which has a magnetic core and a conductive wire wound around the magnetic core and is insulated with a cured product of the thermosetting resin composition according to any one of claims 1 to 9.   An electric device comprising the coil for an electric device according to claim 10.

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