JP2003160622A - Thermosetting resin composition and production method of coil using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coil insulated with a thermosetting resin composition which is excellent in adherability at a high temperature and contains no cobalt and manganese compounds. <P>SOLUTION: The thermosetting resin composition contains (A) an unsaturated polyester resin of 40 to 80 pts.wt., (B) a polymerizable monomer of 20 to 60 pts.wt. and (C) zinc octenate or zinc naphthenate of 0.1 to 5 wt.% (based on the total sum of the (A) component and (B) component). The coil is insulated with the thermosetting resin composition containing (D) an organic peroxide setting agent of 0.5 to 4 wt.% (based on the total sum of the (A) component, (B) component and (C) component). <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermosetting resin composition and a method for producing an insulation-treated coil using the composition.

[0002]

2. Description of the Related Art Conventionally, air conditioner fans, washing machines, etc.
For insulating varnishes such as closed type rotating machines and small type transformer transformers, phthalic acid or its derivative,
It is often used by adding and mixing a peroxide curing agent and a curing accelerator to a varnish obtained by dissolving an unsaturated polyester resin containing an acid or alcohol containing a benzene ring such as bisphenol A in the molecule as a raw material and adding a peroxide curing agent and a curing accelerator.

In recent years, the size and weight of these electric devices have been reduced, and there has been a demand for higher performance and reliability than ever before.

That is, although the temperature of the electric device during operation was 110 to 150 ° C. in the related art, it becomes higher as the size becomes smaller, so that the magnetic vibration generated in the coil during operation is suppressed. There is an increasing demand for varnish adhesion.

Further, the curing accelerator which has been widely used in the conventional unsaturated polyester resin liquid is a heavy metal such as cobalt naphthenate and manganese naphthenate, but when the varnished electric equipment is discarded or recycled,
It is becoming more complicated because it is necessary to control the recovery of these heavy metals or their release into the natural world.

[0006]

DISCLOSURE OF THE INVENTION The present invention provides a coil which is excellent in varnish fixing strength at high temperature and is insulation-treated with a thermosetting resin composition containing no cobalt and manganese compounds. .

[0007]

The present invention is as follows. (1) 40 to 80 parts by weight of (A) unsaturated polyester resin, 20 to 60 parts by weight of (B) polymerizable monomer, and 0.1 to 5% by weight of (C) zinc octenoate or zinc naphthenate.
A thermosetting resin composition containing (based on the total amount of the above-mentioned components (A) and (B)). (D) A thermosetting resin composition containing 0.5 to 4% by weight of an organic peroxide curing agent (based on the total amount of the above-mentioned (A) component, (B) component and (C) component). object. (2) The thermosetting resin composition according to (1), which is a thermosetting resin composition according to claim 1, wherein the polymerizable monomer is styrene and / or a styrene derivative. (3) A coil which is insulation-treated with the thermosetting resin composition according to any one of (1) and (2).

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The unsaturated polyester resin used in the present invention is obtained by reacting an acid component containing an unsaturated dibasic acid as an essential component with an alcohol component.

As the unsaturated dibasic acid, maleic anhydride, maleic acid, fumaric acid and the like are used, and these may be used alone or in combination. As the acid component, usually, in addition to unsaturated dibasic acid, the degree of saturation is used in combination to impart properties such as flexibility, heat resistance and chemical resistance by adjusting the amount of unsaturated groups contained. It

Examples of the saturated dibasic acid include phthalic anhydride, phthalic acid, terephthalic acid, tetrahydrophthalic anhydride, hexahydrophthalic anhydride, hexahydrophthalic acid, tetrahydrophthalic acid, adipic acid and sebacic acid. And so on. These may be used alone or in combination.

The amount of unsaturated dibasic acid is 50 to 50% of the total acid components.
It is preferably selected in the range of 90 equivalent%.

As the alcohol component, a polyhydric alcohol having an ether bond such as diethylene glycol, triethylene glycol, tetraethylene glycol, polyethylene glycol, dipropylene glycol or polypropylene glycol is preferably used. These may be used alone or in combination.

It is preferable to use the total alcohol component in the range of 1 to 1.3 equivalents based on 1 equivalent of the total acid component, and the dicyclopentagenyl monomerate is used in an amount of 3 to 30 equivalent% based on the total acid component. It is preferable to use in the range of 0.1 to 0.6 mol, and it is preferable to use dicyclopentadiene in an amount of 0.1 to 0.6 mol based on 1 mol of the total acid component. Although heat resistance can be imparted to the resin by using dicyclopentagenyl monomerate or dicyclopentadiene, if it is too much, flexibility tends to decrease.

The unsaturated polyester resin used in the present invention can be obtained by mixing the above-mentioned acid component and alcohol component, raising the temperature to 190 to 220 ° C., and conducting a dehydration condensation reaction.

Examples of the polymerizable monomer used in the present invention include styrene, chlorostyrene, divinylbenzene, tert-butylstyrene, styrene derivatives such as styrene bromide, methyl methacrylate, ethyl methacrylate, ethyl acrylate. , Methacrylic acid such as butyl acrylate or an alkyl ester of acrylic acid, β-hydroxyethyl methacrylate, a hydroxyalkyl ester of methacrylic acid or acrylic acid such as ethyl β-hydroxyacrylate, diallyl phthalate, acrylamide, phenylmaleimide and the like. To be Further, polyfunctional methacrylic acid or acrylic acid esters such as ethylene glycol dimethacrylate, neopentyl glycol dimethacrylate, and trimethylolpropane methacrylate can also be used. Of these, styrene and styrene derivatives are preferable.

The compounding ratio of the unsaturated polyester resin and the polymerizable monomer is 100 parts by weight of the total amount of the unsaturated polyester resin and the polymerizable monomer, and the unsaturated polyester resin 40
To 80 parts by weight and 60 to 20 parts by weight of the polymerizable monomer, particularly unsaturated polyester resin 6
It is preferably 0 to 80 parts by weight, and the polymerizable monomer is 40 to 20 parts by weight.

In the present invention, the unsaturated polyester resin is preferably used by dissolving it in a polymerizable monomer.

When the amount of zinc naphthenate or zinc octenoate used in the thermosetting resin composition of the present invention is small, it takes a long time to dry the surface, and when it is large, the curing is too fast and the permeability into the equipment is poor. Therefore, the unsaturated polyester resin and the polymerizable monomer are preferably used within the range of 0.5 to 5 parts by weight per 100 parts by weight of the shipping cost.

The organic peroxide curing agent used in the present invention is dicumyl peroxide, 2,5, dimethyl-2,
5 ditertiary butyl hexane, 1,1-dibutyl peroxy-3,3,5-trimethylcyclohexanoate, tertiary butyl peroxybenzoate, ditertiary butyl peroxide, 2,5 dimethyl 2,5
Examples thereof include ditertiary butylperoxyhexane 3 and tristar butylperoxytriazine, and the types thereof are not particularly limited. If the amount of the curing agent is small, it takes a long time to cure, and if it is large, the curing is too fast and the penetration into the equipment is poor. Therefore, the amount of the curing agent is 0 for 100 parts by weight of the unsaturated polyester resin and the polymerizable monomer. It is preferably used within the range of 0.5 to 4 parts by weight.

The resin composition according to the present invention may contain a colorant, an inorganic filler and other anti-settling agent in combination.

As a method of insulating the coil with the thermosetting resin composition of the present invention, dipping impregnation, drop impregnation and the like are performed. The curing reaction temperature is preferably 120 to 190 ° C.

[0022]

EXAMPLES The present invention will now be described with reference to examples, but the present invention is not limited thereto. In addition, "part" in the following examples means "part by weight" unless otherwise specified. Example 1 8 mol of dicyclopentadiene and 8 mol of maleic acid were charged into a synthetic kettle, 0.02% by weight of hydroquinone was added to the total weight of the above two substances, the temperature was raised to 70 ° C., and water was adjusted to 0.
4 mol was added, the temperature was raised to 140 ° C while paying attention to the heat of reaction, the reaction was carried out at 140 ° C for 1 hour, and then the temperature was lowered to 100 ° C or lower. Next, ethylene glycol 1 mol, 2,2'-
Charge 10 mol of oxydiethanol, 1 mol of phthalic anhydride and 5 mol of maleic anhydride, synthesize at 205 ° C. for 9 hours, and terminate the reaction when the acid value becomes 25 or less.
An unsaturated polyester resin was obtained. 70 parts of the obtained saturated polyester resin and 30 parts of styrene were mixed at 80 ° C. for 1 hour to obtain an unsaturated polyester resin liquid A.

100 parts of the unsaturated polyester resin liquid A, 1 part of tertiary butyl peroxybenzoate as a peroxide, and Naphtex Zinc (trade name: zinc content: 8.5% by weight, manufactured by Nippon Kagaku Sangyo Co., Ltd.) were used. Mix 20 parts,
A uniform resin composition without precipitation of the mixed components is obtained.

The appearance of the obtained resin composition, the gelation time,
Table 1 shows the results of measuring the surface drying time, the pot life, and the adhesive strength of the tracker. <Test method> 1. Appearance The appearance of the liquid was visually evaluated. 2. Gel time According to the test tube method specified in JIS C 2105,
The measurement temperature was 100 ° C and 120 ° C. 3. Surface drying time A test was performed at 120 ° C. according to JIS C 2105. 3. Similar to the pot life gelation time, the test tube with a diameter of 18 mm was
The resin composition was put to 0 mm, sealed, left standing at 35 ° C., and liquid flow of the resin composition was confirmed every predetermined time. The time when the liquid flow became non-uniform was determined as the pot life. 4. Stracker Adhesion The test was performed according to the JIS C 2105 Stracker Adhesion Test. However, a polyamideimide wire with a diameter of 2.0 mm is used for the wire, and the length of the wire is 100 mm.
A test piece was prepared by changing 0 mm and 50 mm to 40 mm. The varnish treatment was performed by the treatment method specified in JIS C 2105, and the curing temperature and time were 170 ° C. for 10 minutes. The test was conducted at 155 ° C and 200 ° C, 5 each
The average value was taken. Example 2 A resin composition was prepared by changing the amount of Naftex zinc used in Example 1 to Nikka Octix zinc (trade name of Japan Chemical Industry: zinc content 85%) and changing the addition amount to 0.24 parts. Then, the same evaluation as in Example 1 was performed, and the results are shown in Table 1. Comparative Example 1 The resin composition was prepared by replacing the naphthex zinc of Example 1 with naphthex cobalt (trade name: manufactured by Nippon Kagaku Sangyo: cobalt content 6%) and changing the addition amount to 0.20 parts. The same evaluations as in Example 1 were performed below, and the results are shown in Table 1. Comparative Example 2 The resin composition was prepared by changing the naphthex zinc of Example 1 to naphthex manganese (trade name of Japan Chemical Industry: manganese content 6%) and changing the addition amount to 0.20 parts, The same evaluations as in Example 1 were performed below, and the results are shown in Table 1.

[0025]

[Table 1]

[0026]

EFFECT OF THE INVENTION The thermosetting resin composition of the present invention has excellent adhesive strength at high temperature and does not contain cobalt and manganese compounds when the electric equipment is discarded or recycled. Can be manufactured.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H01B 3/42 H01B 3/42 D H01F 27/32 H01F 27/32 A F term (reference) 4J027 AB02 AB06 AB07 BA05 BA07 BA08 BA13 BA14 BA18 BA20 BA22 BA24 CA24 CB03 CB08 CC02 CD08 4J038 DD181 DD182 DD191 DD192 FA041 FA042 FA051 FA052 FA071 FA072 FA081 FA082 FA091 FA092 JA44 JA51 JA66 KA03 NA21 P0209E044 AC01 CA02 A11 A02 CA12 511305

Claims (3)

[Claims] 1. (A) Unsaturated polyester resin 40-8
0 parts by weight, 20 to 60 parts by weight of (B) polymerizable monomer,
(C) 0.1% zinc octenoate or zinc naphthenate
A thermosetting resin composition containing 5% by weight (based on the total amount of the above-mentioned components (A) and (B)). (D) A thermosetting resin composition containing 0.5 to 4% by weight of an organic peroxide curing agent (based on the total amount of the above-mentioned (A) component, (B) component and (C) component). object. 2. The thermosetting resin composition according to claim 1, wherein the polymerizable monomer is styrene and / or a styrene derivative. 3. A coil obtained by insulation treatment using the thermosetting resin composition according to claim 1.