JPH03190997A - Lubricant composition - Google Patents

Abstract

PURPOSE:To obtain the subject composition giving self-lubricating insulating electric wire having self-lubricating properties and improved resistance to processing deterioration by dissolving or suspending (a mixture of) a long chain aliphatic diol and (a mixture of) an organic titanate compound in a solvent. CONSTITUTION:(A) 100 pts.wt. simple substance or mixture of a long-chain aliphatic diol expressed by the formula (n is 60-20) and (B) 1-110 pts.wt. simple substance or mixture of an organic titanate compound such as tetraisopropyl titanate are dissolved and/or suspended in a solvent preferably containing a phenolic hydroxyl group to afford the aimed composition.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a lubricant composition that provides a self-lubricating insulated wire with excellent self-lubricating properties and improved resistance to processing deterioration.

(Prior art and its problems) In recent years, high-speed automatic winding machines have been widely used by electrical manufacturers in order to speed up the process of winding coils for telecommunication equipment, etc. It's coming. For this reason, the surface of the insulating layer of the insulated wire is required to have sufficient slipperiness or wear resistance. That is, during the winding process, the insulated wire is subjected to friction at a portion of the needle and pulley, causing mechanical damage to the insulating layer. Therefore, as the winding speed increases, the defective rate increases, and there is a need to reduce this defective rate.

In addition, when forming a coil, if the slippage between insulated wires or between the insulated wires and the equipment is poor, the coil space factor may become thick (or
The ease of inserting the motor into the slot decreases. In response to these problems, there has been a demand for insulated wires with good slip properties.

In order to meet these demands, conventional methods have been to apply a thin layer of lubricant such as wax or lubricating oil on the insulated wires to lower the coefficient of friction of the insulated wires and minimize mechanical damage caused by friction. has been done. However, this method has the disadvantage that it is extremely difficult to control the amount of lubricant applied and to uniformly apply the lubricant to the outer layer of the insulated wire.

Furthermore, since dust, dirt, etc. in the air adhere to the insulated wires coated with these lubricants, it was necessary to wash the molded product with a solvent after forming the coil.

For this reason, the method of coating the insulated wires with a coating mainly composed of polyamide resin, mainly made of 6- or 6,6-nylon, is mainly used. However, when the polyamide resin coating is applied and baked, has the disadvantage that the softening resistance of the insulated wire is significantly reduced.

Furthermore, in order to provide slipperiness, it is necessary to apply and bake a film with a certain thickness or more, which poses a problem in that the coil space factor becomes large.

Therefore, it is an object of the present invention to solve the problems of the prior art described above, and to provide superior heat resistance compared to conventional insulated wires, as well as to exhibit properties equivalent to or better than conventional insulated wires in terms of properties such as abrasion resistance and slipperiness. Another object of the present invention is to provide a lubricant composition that provides an insulated wire with self-lubricating properties and excellent coil winding properties.

(Means for solving problems) The above objects are achieved by the present invention as described below.

That is, the present invention involves dissolving a long-chain aliphatic diol or a mixture represented by the general formula % (in which n is a numerical value of 16 to 20) and an organic ditanate compound or a mixture in a solvent. /or v! , a lubricant composition characterized by being cloudy.

(Function) By using a lubricant composition with a specific composition, even with a very thin lubricant layer, it has superior heat resistance compared to conventional insulated wires, and has improved wear resistance, slipperiness, etc. There is provided an insulated wire that exhibits the same or better properties and has self-lubricating properties with excellent coil windability.

(Preferred Embodiments) Next, the present invention will be explained in more detail by citing preferred embodiments.

The long-chain aliphatic diol used in the present invention is a long-chain aliphatic diol having 16 to 20 carbon atoms or a mixture thereof, and in the case of an aliphatic diol having a carbon number less than the above range, the slippage of the resulting insulated wire On the other hand, aliphatic diols having a carbon number exceeding the above range are unsatisfactory in terms of solution stability of the solvent.

One example of such long-chain aliphatic diols that can be easily obtained and used on the market is SL 20 Dial (trade name), which is a mixture of aliphatic diols having 16 carbon atoms and aliphatic diols having 20 carbon atoms. (Made by Intermediate Oil Co., Ltd.).

The organic titanate compounds used in the present invention include tetraisopropyl titanate, tetrabutyl titanate,
Te! - Lahexyl titanate, tetramethyl titanate, tetrabropyrditanate, tetracryl titanate, tetracryl titanate and polymers thereof.

The blending ratio of the long-chain aliphatic diol and the organic titanate compound used in the present invention is preferably 1.10 parts by weight of the organic titanate compound per 100 parts by weight of the long-chain aliphatic diol. If it is less than 1 part by weight, the breakdown voltage of the insulated wire will decrease;
If it exceeds 10 parts by weight, slipperiness will deteriorate.

Examples of solvents used to dissolve or suspend the above components include solvents having phenolic hydroxyl groups, such as phenol, ○-cresol, m-cresol, p-cresol, 2,3-xylenol, 2,4 -xylenol, 25-xylenol, 2,6-xylenol, 34-
Xylenol, 3,5-xylenol, on-propylphenol, 2,4.6-1-limethylphenol, 2
, 3.5-) trimethylphenol, 2゜4.5-trimethylphenol, 4-ethyl 2-methylphenol, 5
Preference is given to using -ethyl-2-medylphenol and their mixtures, cresylic acid. Further, as the diluent, for example, aliphatic hydrocarbons, aromatic hydrocarbons, ethers, acetals, ketones, esters, etc. can be used.

Examples of aliphatic hydrocarbons and aromatic hydrocarbons include:
n-hebutane, n-octane, cyclohexane, decalin, dipentene, pinene, p-menthane, decane, dodecane, tel-ladecane, benzene, toluene, xylene, ethylbenzene, diethylbenzene, isopropylbenzene, amylbenzene, p-cymene , tetralin or a mixture thereof, petroleum naphtha, coal tar naphtha, solvent naphtha and the like.

The lubricant composition of the present invention comprises the above-mentioned long chain aliphatic diol,
It can be produced by simply dissolving and/or suspending the organic decnate compound in the above solvent. The solid content concentration and viscosity of the obtained lubricant composition are arbitrary, but the solid content is about 10 to 25% by weight, and the viscosity is about ]O to 4.
A range of 0 cP is preferred.

The self-lubricating insulated wire according to the present invention can be obtained by applying and baking the lubricant composition according to the present invention onto the insulating layer of a conventionally known insulated wire.

The type of insulated wire used is not particularly limited, and for example,
Any insulated wire such as polyurethane-coated, polyester-coated, polyesterimide-coated, polyimide-coated, polyamide-imide-coated, etc. may be used.

The amount of the lubricant composition to be applied onto the insulated wire may be 0.1 μm or less in thickness after baking, and is specifically determined each time depending on the type and thickness of the insulated wire. The preferred range is from 0.005 to 0.1 tm. If the thickness is less than the above range, the lubricity will be insufficient, while if it exceeds the above range, the coil winding property will be insufficient.

Coating and baking can be done by conventionally known methods (for example, continuous coating using a method such as die drawing or felt drawing, and baking at a temperature of about 300 to 500°C to create a self-containing material with the desired performance. A lubricious insulated wire is obtained.

(Effects) According to the present invention as described above, by using a lubricant composition with a specific composition, even a very thin lubricant layer has superior heat resistance and superior heat resistance compared to conventional insulated wires. Provided is an insulated wire that exhibits similar or superior properties in terms of properties such as abrasion resistance and slipperiness, and has self-lubricating properties with excellent coil winding processability.

(Example) Next, the present invention will be explained in more detail by giving examples and comparative examples. It should be noted that unless otherwise specified, the terms in the text or % are based on weight.

Example 1 Long chain aliphatic diol (SL 20 Dial) 100
After dissolving and suspending 1 part in 523 parts of cresol at room temperature,
Two parts of tetrabutyl titanate monomer were added to obtain a lubricant composition of the present invention having a non-volatile content of 16.0% and a viscosity of 20 cP. In addition, the measurement of non-volatile content and viscosity is based on JIS C2.
According to the latest edition of 351-1988.

Conductor diameter is 0.32m with commercially available polyester insulation coating
m type 1 polyester insulated wire (finished outer diameter 0.360 m
m) Baking the above lubricant composition onto the surface at a temperature of 500°C;
1 with felt drawing under the condition of taking-up speed of 20 m/min.
A self-lubricating insulated wire of the present invention having a finished diameter of 0.360 mm was obtained by coating and baking. The finished outer diameter of this self-lubricating insulated wire is the same as the finished outer diameter of the polyester insulated wire in units of 0°001 mm.

Regarding this self-lubricating insulated wire, the one-way friction property, dielectric breakdown voltage, softening resistance, static friction coefficient, etc. were measured and the results are shown in Table 1 below.

In addition, the unidirectional friction property, dielectric breakdown voltage, and softening resistance characteristic tests were performed in accordance with 1. According to JIS C3003-1984 enamelled copper wire and enameled aluminum wire test method. The static friction coefficient was measured using a static friction coefficient measuring device manufactured by Toyo Seiki ■.

Example 2 The same operation as in Example 1 was repeated except that 100 parts of S], 20 Dial, 475 parts of cresol, and 50 parts of tetrabutyl titanate monomer were used, and the nonvolatile content was 15.8%.
, a lubricant composition of the present invention having a viscosity of 19 cP was obtained.

Next, a characteristic test was conducted in the same manner as in Example 1, and the results shown in Table 1 below were obtained.

Example 3 The same operation as Example 1 was repeated except that 100 parts of SL 20 Diol, 425 parts of cresol and 100 parts of tetrabutyl titanate monomer were used, and the non-volatile content was 16.1 parts.
%, a viscosity of 22 cP was obtained.

Next, a characteristic test was conducted in the same manner as in Example 1, and the results shown in Table 1 below were obtained.

Example 4 Using the lubricant composition of Example 1, the above composition was baked onto a type 1 polyurethane insulated wire (finished outer diameter 0.350 mm) having a conductor diameter of 0.32 mm and having a commercially available polyurethane insulation film. Under conditions of a temperature of 360° C. and a take-up speed of 20 m/min, the coating was applied once to Fell 1 using a drawer and baked to obtain a self-lubricating insulated wire of the present invention having a finished diameter of 0.350 mm. The finished outer diameter of this self-lubricating insulated wire is 0.001mm.
The unit is the same as the finished outer diameter of the polyurethane insulated wire.

Next, a characteristic test was conducted in the same manner as in Example 1, and the results shown in Table 1 below were obtained.

Comparative Example 1 The above polyester insulated wire was subjected to a characteristic test using the same procedure as in Example 1, and the results shown in Table 1 below were obtained.

Comparative Example 2 The polyurethane insulated wire was subjected to a characteristic test using the same procedure as in Example 1, and the results shown in Table 1 below were obtained.

Comparative Example 3 6.6-Nylon resin was dissolved in a mixed solvent (cresol/naphtha-75/25) to obtain a non-volatile content of 16.0% and a viscosity of 2.
, 700 cP, a comparative lubricant 1 2 agent composition was obtained.

Conductor diameter is 0.32m with commercially available polyester insulation coating
m type 1 polyester insulated wire (finished outer diameter 0.360 m
m) The above-mentioned composition was applied and baked once on the wire at a temperature of 500° C. and a take-off speed of 20 m/min using a die to obtain a self-lubricating insulated wire of a comparative example.

Next, a characteristic test was conducted in the same manner as in Example 1, and the results shown in Table 1 below were obtained.

Comparative Example 4 SL 20 Dial 100 parts and Cresol 525
A lubricant composition of a comparative example having a nonvolatile content of 15.6% and a viscosity of 18 cP was obtained. This composition was coated and baked on a polyester insulated wire to form a lubricating layer, and characteristic tests were conducted in the same manner as in Example 1, with the results shown in Table 1 below.

Comparative Example 5 1.12-dodecanediol1. A comparative lubricant composition having a nonvolatile content of 16.0% and a viscosity of 7 c P was obtained using 0 parts of O, 475 parts of cresol, and 50 parts of tetrabutyl titanate monomer. This composition was coated on a polyester insulated wire and baked to form a lubricating layer, and property tests were conducted in the same manner as in Example 1, with the results shown in Table 1 below.

As is clear from Table 1, the self-lubricating insulated wire of the present invention has a low coefficient of static friction and excellent softening resistance.

(Margin below) sudden hair-1-j cheap

Claims (2)

[Claims] (1) A simple substance or a mixture of long-chain aliphatic diols represented by the general formula HO-(CH_2)_n-OH (in the formula, n is a numerical value of 16 to 20) and a simple substance or a mixture of an organic titanate compound are used in a solvent. A lubricant composition characterized in that it is dissolved and/or suspended. (2) The lubricant composition according to claim 1, wherein the amount of the organic titanate compound added is in the range of 1 to 110 parts by weight per 100 parts by weight of the long-chain aliphatic diol.