JPH044515A - Lubricating insulated wire - Google Patents

Abstract

PURPOSE:To improve coiling ability and heat resistance, by applying and baking a lubricating insulated paint formed out of a polyetherimide resin and a silicone modified epoxy resin of specified ratios, that are dispersed and dissolved in an organic solvent, on a conductor directly, or through an insulated film. CONSTITUTION:A reactive silicone of the amount of molecules of 100010000 that has an amino group on the end, and a bisphenol A-type epoxy resin of epoxy equivalent of 450-4000, are reacted with each other for 100 weight part of polyetherimide resin. A silicone modified epoxy resin thus obtained is added to the polyethersulfon by 0.1-20 weight part, or preferably 5-15 weight part, and they are dispersed and dissolved in an organic solvent so as to form a lubricating insulated paint, which is applied and baked on a conductor directly or through an insulated film. The polyether imide resin is an amorphous thermoplastic polymer. A homogenous surface lubricating feature can be obtained thereby, while coiling feature and heat resistance can thus be improved.

Description

[Detailed Description of the Invention] [Industrial Application Fields] 1. The present invention relates to 2. lubricious insulated gL wires having excellent surface lubricity and high heat resistance. [Prior Art] Polyurethane paint; Insulated wires made by coating and baking polyester paint etc. on the conductor are widely used as coils for electrical and electronic equipment, etc., but it is possible to improve the winding properties by preventing processing deterioration during coil winding and breakage when wire is fed out. In order to achieve this, it is necessary to lubricate the surface of the insulating film and increase the mechanical strength of the film to increase its wear resistance. For this reason, conventional methods have been to apply a lubricant such as liquid paraffin or refrigerating machine oil to the surface of the insulating film, or to apply a lubricant such as nylon (6-
A method of coating the outer periphery of an insulating film with nylon, 6-6 nylon, etc. and then applying a lubricant, or a method of adding a lubricant to the insulating coating were used.

[The invention attempts to solve the problem] [91 However, as electrical and electronic equipment has become smaller and more sophisticated in recent years, #! Organic gases generated from edge materials are attracting attention as a cause of equipment malfunction, and it is desired to reduce the generation of such organic gases as much as possible8.
In relay circuits, liquid paraffin, which is applied as a lubricant to the surface of the insulating film, decomposes due to the arc generated when relay contacts open and close, and adheres to the contacts as carbon, increasing contact resistance and reducing contact wear. The problem was that it was too early. Further, when applying the lubricant, there is a problem in that it is difficult to apply the lubricant uniformly to the surface of the electric wire, and stable surface lubricity cannot be obtained. Further, although the abrasion resistance of the coating can be improved by coating the outer periphery of the insulation coating with nylon, there is a problem in that the heat resistance decreases due to the characteristics of the nylon resin.

Additionally, when using additive lubricants such as higher fatty acid esters added to insulation paints, the boiling point of the lubricant higher fatty acid esters is close to that of cresol, which is the solvent for insulation paints. In some cases, the lubricant evaporates, and in some cases, it hardly remains in the film, so it tends to lose its lubricating effect.Furthermore, due to the difference in chemical structure of the lubricant, it has poor compatibility or dispersibility with the paint, so the amount added is limited. There was a problem with putting it away. In order to solve these problems, a lubricating nylon paint made by adding a lubricant to nylon and dissolving it in an organic solvent was applied to the outer periphery of the insulating film and baked.
Wear resistance of insulated wires 1. Methods have been taken to improve surface lubricity. However, there has been a problem in that the heat resistance of the insulating film decreases, significantly impairing the reliability of the insulated wire.

The present invention was made to solve the problems of these conventional techniques, and provides a lubricious insulated wire that has uniform surface lubricity, good winding properties, and excellent heat resistance. The purpose is to provide.

[Means for Solving Problem 11] In order to achieve the above object, the present invention provides reactive silicone having a molecular weight of 1,000 to 10,000 and having an amino group at the terminal, based on 100 parts by weight of polyetherimide resin. 0.1 to 20 parts by weight, preferably 5 to 15 parts by weight, of a silicone-modified epoxy resin obtained by reacting bisphenol A type epoxy resin with an epoxy equivalent of 450 to 4,000 are added, and this is dispersed and dissolved in an organic solvent. The present invention provides a lubricious insulated wire characterized in that a lubricious insulating paint made of the following is applied onto a conductor directly or via an insulating film and baked.

The polyetherimide resin used as the main component of the lubricating road 1# paint of the present invention is a non-grade thermoplastic polymer and is represented by the following general formula.

This polyetherimide resin has heat resistance 1 mechanical properties,
Excellent electrical properties. Generally, 6-nylon, 6-
In the case of crystalline resins such as nylon 6, the physical properties tend to change rapidly as the temperature rises. On the other hand, since polyetherimide resin is a non-crystalline resin due to its trimolecular structure, its physical properties change very little with temperature rise, and it has toughness and high strength over a wide temperature range.

A specific example of polyetherimide resin is Ultem+
000 (Engineering Plastics Company product name)
can be mentioned.

The silicone-modified epoxy resin used as the second component of the lubricious insulating paint is a reactive silicone having a molecular weight of 1,000 to 10,000 (hereinafter referred to as
(abbreviated as reactive silicone) and epoxy equivalent of 450~
4.000 bisphenol A type epoxy resin (hereinafter referred to as
It is obtained by reacting epoxy resin (abbreviated as epoxy resin), and by adding it to the main component polyetherimide resin, it is used for the purpose of imparting lubricity to the surface of the insulated wire and improving the single winding property. This silicone-modified epoxy resin also has excellent electrical insulation and weather resistance.

The reactive silicone is used as a component that imparts lubricity, but when it is directly added to polyetherimide resin and dispersed and dissolved in an organic solvent, the stability of the coating is poor and it separates when left open for a long time.

In addition, reactive silicones have amino groups, but polyetherimide resins do not have reactive groups, so when baking paints, no chemical reaction occurs and most of the reactive silicones volatilize. Good surface lubricity cannot be obtained. Therefore, 9-reactive silicone, which uses a silicone-modified epoxy resin obtained by reacting a reactive silicone and an epoxy resin in advance as a lubricity imparting component, is represented by the following general formula.

(Me represents a metal group) Specific examples include Silaprene FM3311. Same F
Examples include M3321 and FM3325 (trade name of Chisso Corporation).

The molecular weight of the reactive silicone is 1,000 to 10,000.
The reason for this limitation is that if the molecular weight is less than 1,000, it will have little effect as a lubricity-imparting component.
This is because if it exceeds 000, the paint will lack stability. the epoxy resin is reacted with the reactive silicone,
In addition to improving paint stability, baking is also used to improve the thermal stability of lubricants. Specific examples include Ebicoat 1001° and 1004. Same 1007.
1009 (product name of Yuka Shell Epoxy Co., Ltd.), Evototo VD-011. Same VD-014, same VO-O+7 (
Tobu Kasei Co., Ltd. (trade name), etc. The reason for limiting the epoxy equivalent of the epoxy resin to 450 to 4,000 is that if the epoxy equivalent is less than 450, the epoxy resin is highly reactive, making it difficult to control the reaction with reactive silicone. This is because if the amount exceeds 100%, the content of silicone in the reactant decreases and good surface lubricity cannot be obtained.

The reason why the amount of the silicone-modified epoxy resin added is limited to 0.1 to 20 parts by weight per 100 parts by weight of polyetherimide resin is that when the amount added is less than 0.1 part by weight, good surface lubricity is achieved. is not obtained, and if it exceeds 20 parts by weight, the properties of the polyetherimide resin are impaired. That is, if the amount added is large, the plasticizing effect of the silicone-modified epoxy resin will be impaired and the thermal softening temperature of the film will be lowered.

[For production]

The lubricious insulated wire of the present invention is produced by applying and baking a lubricious insulating paint made by dispersing and dissolving polyetherimide resin and silicone-modified epoxy resin in an organic solvent onto the conductor directly or through an insulating film. can get. therefore,
This insulated wire has excellent heat resistance due to polyetherimide resin and excellent surface lubricity due to silicone-modified epoxy resin.

Silicone-modified epoxy resin contains benzene in the resin skeleton.
Because it has a polyetherimide ring, it has good dispersibility in lubricating paints whose main component is polyetherimide resin, improving the stability of the paint. Since it is uniformly dispersed in the resin, uniform and stable lubricity can be imparted to the film surface.

〔Example〕

The content of the present invention will be explained below with reference to Examples and Comparative Examples.

Example 1 2,000 yen equipped with stirrer, thermometer and cooling tube
Silabrene FM3321 as a 5-reactive silicone] OOg + 100 g of Epicoat 1007 as an Evokin resin and 1,133 g of m-cresol as a solvent were placed in a separable round bottom flask, and heated gradually while stirring. When the internal temperature reaches 180°C, continue heating and stirring at that temperature for 3 hours to react the reactive silicone and epoxy resin. After the reaction, cool to room temperature to form a cresol dispersion of silicone-modified epoxy resin with a concentration of 15%. (hereinafter abbreviated as silicone-modified epoxy resin dispersion A) was obtained. Further, polyetherimide resin Ultem 1000 was dissolved in a solvent of m-cresol/kijirole=6/4 (weight ratio) to obtain a polyetherimide resin solution (hereinafter abbreviated as PEI solution) with a concentration of 15%.

47.6 g of the silicone-modified epoxy resin dispersion A was added to 952.4 g of the PEI solution and thoroughly stirred to prepare a lubricating insulating paint.

Next, the enameled wire baking furnace (horizontal furnace length 2.5 m) was used to heat the wire to a temperature of 0.
Class B polyurethane insulation paint WD430 on the 20-copper wire
5 (Hitachi Chemical Co., Ltd. trade name) concentration 35% was applied and baked four times under the same baking conditions as a general polyurethane insulating paint (furnace temperature 350°C, wire speed insulating paint) to produce a lubricating insulated wire.

Example 2 Silicone-modified epoxy resin dispersion A91 obtained in Example 1. A lubricant insulated wire was produced in the same manner as in Example 1 except that Og was added to 909.0 g of PEI solution and thoroughly stirred to prepare a lubricant insulating paint.6 Example 3 Obtained in Example 1 Add 130.4 g of silicone-modified epoxy resin dispersion A to 869.6 g of PEr solution and stir thoroughly to form a lubricating insulating paint. A lubricious insulated wire was produced in the same manner as in Example J, except for I.
50g of 321, Ebiko h+oo as epoxy resin
100g of 7 and 850g of m-cresol as a solvent
g, and in the same manner as in Example 1, a 15% silicone-modified epoxy resin cresol dispersion (hereinafter abbreviated as silicone-modified epoxy resin dispersion B) was obtained. Further, a PEr solution was obtained in the same manner as in Example 1.

847.6 g of the above silicone-modified epoxy resin dispersion was added to 952.4 g of PEr solution and thoroughly stirred to prepare a lubricating insulating paint. Next, a lubricious insulated wire was manufactured in the same manner as in Example 1.

Example 5 Same as Example except that silicone-modified epoxy resin dispersion B 91 obtained in Example 4 was added to (1 g of PEI solution 909.0) and stirred to form a lubricating insulating paint. A lubricious insulated wire was produced in the same manner as in ".

Example 6 Lubrication was carried out in the same manner as in Example 1, except that the silicone-modified epoxy resin dispersion 3130.41 obtained in Example 4 was added to 6 g of PEIm 86 liquid and thoroughly stirred to prepare a lubricating insulated wire. manufactured insulated wire.

Comparative Example A P-class polyurethane insulating paint WD4305 (product name of Hitachi Chemical Co., Ltd.) with an S content of 35% was applied to a 0.20-copper wire in the same enameled wire baking furnace as in Example 1. After coating and baking (brushing) 10 times, a polyurethane insulated wire was manufactured by coating the surface of the film with liquid paraffin.Comparative Example 2 Polyurethane amide resin CM3001N (product name of Toshiko) 1
20g m-1, Sol/Kijirol = 6/4 (
A nylon paint with an S content of 12% was obtained by dissolving the mixture in 880 g of a solvent (weight ratio). Next, in the enamelled wire baking furnace of Example 1,
, 2 On the I + Q'7- line, apply 1/tan paint WD43 (trade name of 1601 Ritsui Shichiseisha) concentration 35%
Evening: After applying and baking seven times under the baking conditions of Example 1 and Threshold, the nylon paint of this comparative example was applied four times under the same baking conditions.

Baking [7] A polyurethane nylon insulated wire was manufactured by coating the surface of the film with liquid paraffin.

Characteristic Test 1 The general characteristics of the lubricating insulated wire of the present invention and the insulated wire of the comparative example were tested, and the results are shown in Table 1. 2 Characteristic Test 2 Based on "JIS C3003r Enameled Copper Wire and Enameled Aluminum Wire Test Method", Examples 1 to 6. Comparative example], using the insulated wire of 2! 2m for edge breakdown voltage measurement
The twisted sample was left in a constant temperature bath kept at 220℃ for 168 hours, then taken out and heated to #! at room temperature. The initial value was calculated from the dielectric breakdown voltage after heat treatment in the greenhouse and the remaining ratio is shown in Table 2.

〔Effect of the invention〕

The lubricious insulated wire of the present invention has a surface friction coefficient μ of 0.10 to 0.11, as shown in the examples in Table 1, and has a coating with excellent surface lubricity, so it is suitable for coil winding. Linearity is extremely good. That is, when winding a coil, the wire is easily drawn out from the bobbin, so there is no wire breakage, and since the wire can be wound with stable tension, there is little processing deterioration of the wire, and it can be used for high-speed winding. Furthermore, since the surface of the film is not coated with liquid paraffin, refrigerating machine oil, etc. that generate organic gases that cause malfunctions of electrical and electronic equipment, the reliability of electrical and electronic equipment is significantly improved. Furthermore, as shown in the examples in Table 2, it has extremely excellent heat resistance and can withstand use at high temperatures. Therefore, the lubricious insulated wire of the present invention is useful as a highly reliable insulated wire suitable for use in environments where the usage environment is becoming increasingly harsh due to the miniaturization and higher performance of electrical and electronic equipment.

Claims (1)

[Claims] (1) For 100 parts by weight of polyetherimide resin,
Molecular weight 1,000-10,00 with amino group at the end
0 reactive silicone and epoxy equivalent weight 450-4,00
Adding 0.1 to 20 parts by weight of a silicone-modified epoxy resin obtained by reacting a 0.0 bisphenol A type epoxy resin, dispersing and dissolving this in an organic solvent, and applying the lubricating insulating paint directly onto the conductor or A lubricating insulated wire characterized by being coated and baked through an insulating film.