JPS6032896A - Lubricant for calendering winding of copper or copper alloy - Google Patents

Abstract

PURPOSE:To provide titled novel lubricant of both moderate viscosity and lubricity, also free from causing any discoloration on copper (alloy) surface, comprising benzotriazole and reaction product from vegetable oil, polyoxyalkylene glycol and alkanolamine. CONSTITUTION:The objective lubricant can be obtained by, preferably, the following process: (A) a reaction product prepared by incorporating (i) 30-80wt% of vegetable oil or the fatty acid constituting said oil with (ii) 20-50wt% of polyoxyalkylene glycol followed by condensation at 100-250 deg.C in the presence of alkali catalyst, then adding (iii) 5-20wt% of alkanolamine followed by further condensation at <100 deg.C, is incorporated with (B) 0.005-0.1wt% of benzotriazole.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lubricant used when rolling rolled copper or copper alloy.

As the rolling equipment for copper or copper alloy becomes larger, the winding equipment is also large and complicated. A new type of lubricant that has an appropriate viscosity for spraying onto the surface of copper, has appropriate lubricity for smooth winding, and does not cause discoloration on the copper or copper alloy surface. The emergence of a drug has been desired.

In other words, the lubricant used here is different from water-soluble or emulsion-type low-viscosity lubricants used in processes such as shedding, and is designed to adhere to the surface of the rolled copper or copper alloy material. It is a lubricant. In order to develop a lubricant that satisfies all of these requirements, the present invention was developed as a result of various studies, and the background is as follows.

First of all, it is difficult to use animal fats and oils that are solid at room temperature, so vegetable oils or mineral oils are usually considered. However, mineral oil-based oils have a high acid value, poor lubricity, and contain sulfur, so they have the disadvantage of discoloring the surface of copper or copper alloys.
For example, in the case of a composition in which machine oil is mixed with glycol ester, amine, etc., a certain degree of lubricity can be obtained and discoloration of the copper or copper alloy surface can be reduced, but it is still not sufficient, and this type of composition cannot be improved. Have difficulty.

The present inventors also studied vegetable oils and found that even if vegetable oils alone were better than the mineral oils mentioned above, further improvements in lubricity and discoloration were required, and vegetable oils and fats or the fatty acid with a molecular weight of 200-100
A lubricant made of a reaction product of a polyoxyalkylene glycol of 0.0 and an alkanolamine under an alkaline catalyst is known to be extremely excellent in various aspects such as sprayability, lubricity, and discoloration. understood.

When using this lubricant, rolling ronds are used for town-down rollers, spinner shafts, and wire storage devices.

When passing through complex mechanisms such as coiling gates, smooth work can be expected, and the product is also less prone to discoloration.

However, since the coiled copper or copper alloy is later drawn to a predetermined diameter, there is always a risk that this discoloration will spread to the product, so it is desirable to eliminate it altogether. Therefore, as a result of further studies by the present inventors, it was found that by adding benzotriazole to the lubricant mainly composed of the vegetable oil or its fatty acid, it did not cause discoloration at all, had smoothness, and spraying had no adverse effect on the properties. I succeeded in obtaining no lubricant.

That is, the present invention mainly consists of vegetable oils with a melting point of 20°C or less or fatty acids constituting the oils and fats, and vegetable oils with a molecular weight of 200 to 200°C.
It is a rolling and winding lubricant consisting of a reaction product of a polyoxyalkylene glycol of 1000 and an alkanolamine under an alkali catalyst and benzotriazole, and a more preferable composition is a vegetable oil or a fatty acid constituting the fat of 30 to 80. Add 20 to 50 weight percent of polyoxyalkylene glycol to 100 to 50 percent by weight under an alkali catalyst.
Condensation was carried out at 250°C, and then alkanolamine 5~
This is a lubricant made by adding 20% by weight of benzotriazole and condensing it at less than 100°C, and adding 0.05 to 01% by weight of benzotriazole.

In the present invention, vegetable oils with melting points of 20°C or lower or fatty acids constituting the oils (decomposition products of the vegetable oils and consisting of a plurality of fatty acids) are used as main ingredients at temperatures lower than 20°C, and at room temperature. This is because it is liquid and easy to handle, and it remains liquid at room temperature even when condensed with glycols and amines, which will be described later.When talking about the amount of each component, the amount of vegetable oil or the fatty acids that make up the oil and other glycols and amines is It is designed to cause esterification reactions and maintain some alkalinity.

That is, vegetable oil or its fatty acid has a weight of 30 to 80 days.
If the weight is less than 80% by weight, the glycol or amines will be excessive and the lubricity will deteriorate, and if it exceeds 80% by weight, it will contain unreacted vegetable oil or its fatty acids and cause discoloration on the copper or copper alloy surface. There is a greater possibility that

Polyoxyalkylene glycol with a molecular weight of 200 to 1000 is mixed with the fatty acid component of vegetable oil under an alkali catalyst.
By maintaining the temperature at ~250°C, esterification reaction occurs well and glycol etc. are liberated. In this case, the preferred addition amount is 20 to 50 wtffi%; if it is less than 20 wt%, esterification will be insufficient and it will be difficult to exhibit the desired slipperiness, and if it exceeds 50 wt%, esterification will be too large. There is less room for amines to bond, inhibiting improvement in lubricity.

Next, the alkanolamine is represented by, for example, triethanolamine, inpropanolamine, triisopropanolamine, imbutanolamine, etc., but the preferable amount is 5 to 20% by weight, so that the esterified liquid becomes lower than 100°C. When added, it reacts with vegetable oil or its constituent fatty acids to produce fatty acid amides. This improves lubricity and is sufficiently effective in preventing surface discoloration of copper or copper alloys. If the alkanolamine content is less than 5% by weight, free fatty acids will be generated, which may cause discoloration of the conductor on the surface of the copper or copper alloy.If the content exceeds 20% by weight, the effect of the alkanolamine will be saturated and the cost will only increase. This will reduce the required lubricity.

In addition, in the present invention, esterification is carried out under an alkali catalyst and alkanolamine is condensed, so it is always weakly alkaline and does not show acidity, and this also reduces the occurrence of surface discoloration of copper or copper alloy. I think that the. However, in the present invention, in addition to the above, benzotriazole, which is an antioxidant, is added to completely prevent discoloration in any sense. That is, the preferred amount of benzotriazole added is 0.05 to 0.1 parts by weight, but if it is less than 0.005 parts by weight, there is almost no effect, and on the contrary, if it exceeds 0.1 weight St'r%, it will prevent discoloration. The effect will be saturated and the cost will only increase.

By the way, some examples of the vegetable oils and fats used in the present invention and the fatty acids constituting them are as follows.

mustard oil Unsaturated acid erucic acid 44 Oleic acid 22 Linoleic acid 15t Eicosenoic acid 7th Rirun r! /7th Section Saturated acid palmitic acid 2% soybean oil Unsaturated acid linoleic acid 55 Oleic acid 27% Rilunic acid 5 attacks Saturated acid palmitic acid 8 Stearic acid 5t rapeseed oil Unsaturated acid oleic acid 60 Linoleic acid Section 20 Rilunic acid 10 t Saturated acid stearic acid trilobate Palmitic acid 4th castor oil Unsaturated acid Ricinol Shun 90chi Oleic acid 6th Linoleic acid 2t Saturated acid palmitic acid 2t Next, embodiments of the present invention will be described.

Example 1. 0.5% by weight of potassium hydroxide is added to 60.5% by weight of rapeseed oil and 24% by weight of polyethylene glycol, stirred well, and esterified at 100 to 250°C. Next, when the temperature was lower than 100° C., 15% by weight of triethanolamine was added to form an acid amide, and 0.06% by weight of benzotriazole was further added to obtain the lubricant of the present invention.

Example 2 0.5% by weight of potassium hydroxide was added to 585% by weight of soybean oil and 29% by weight of polyethylene glycol and esterified by stirring well at 100 to 250°C.
When the temperature is lower than 00℃, triethanolamine 1
2% by weight was added to form an acid amide, and further 0.07% by weight of benzotriazole was added to obtain the lubricant of the present invention.

Example 3. rapeseed oil 35.5% by weight, soybean oil 30% by weight,
34% by weight of polypropylene glycol and 0 potassium hydroxide
．． Add 5% by weight, stir well and esterify at 100-250°C, then add 15% by weight of jetta-weight toluamine at below 100°C.
The lubricant of the present invention was obtained by adding Chongkei Chi to produce an acid amide.

Example 4 Rapeseed oil 35.5% by weight, castor oil 15% by weight
After adding potassium hydroxide to 34% by weight of polypropylene glycol, stirring well and esterifying at 100 to 250°C, 15% by weight of jetanolamine was added at 100°C to form an acid amide, thereby producing the lubricant of the present invention. I got it.

Example 5. Rapeseed oil 32.5% by weight, mustard oil 30% by weight, polyethylene polyzolopylene glycol 2% by weight
Add 0.5% by weight of potassium hydroxide to the solution and stir well.
After esterification at 0 to 250°C, 10% by weight of jetanolamine was added at less than 100°C to form an acid amide to obtain the lubricant of the present invention.

Example 6 Potassium hydroxide 05% by weight was added to 485% by weight of rapeseed fatty acid, 36% by weight of polyethylene glycol,
After esterification by stirring well at 100 to 250°C, 10
Triethanolamine 15 when the temperature is lower than 0℃
% by weight was added to form an acid amide, and 0.08% by weight of benzo)IJ azole was added to obtain the lubricating oil of the present invention.

Example 7. Add 0.5% by weight of potassium hydroxide to 50.5% by weight of soybean fatty acid and 43% by weight of polyethylene polypropylene glycol, stir well at 100 to 250°C to esterify, and then cool to a temperature below 100°C. 6% by weight of monoethanolamine was added to produce an acid amide, and 0.06% by weight of benzotriazole was further added to obtain the lubricant of the present invention.

Comparative example 1. Rapeseed oil alone was used as a lubricant.

Comparative example 2. Castor oil alone was used as a lubricant.

Comparative Example 3 A composition consisting of 50% by weight of machine oil "120", 4s% polyethylene glycol oleate, and 5% by weight of polyoxyethylene laurylamine was used as a lubricant. The results of the lubricity and discoloration tests are shown in the table below.

Comparative example 4. This is a lubricant shown in Example 1 except that benzotriazole is removed.

Comparative Example 5 This is a lubricant shown in Example 6 except that benzotriazole is removed.

The evaluation method is as follows.

Viscosity: The adsorption state of lubricant on the wire surface was evaluated.

(Assessed by the degree of entanglement when the wire is fed into the machine) Smoothness:
The wire rod was evaluated by measuring its lubricity and degree of abrasion.

Discoloration Test After rolling the two wire rods, the wire rods were allowed to stand for 168 hours, and the glossiness of the wire surface was observed and evaluated.

However, Hide = 20 coil 100t check and discoloration defective O chi: 〃 〃 0-5 chira: N # 5-15 chicks defective: The lubricant according to each embodiment of the present invention is completely adsorbed on the surface of the wire, and has good lubricity and can give a glossy finish to the surface of the wire, making it possible to manufacture high-quality copper products.

Agent: Patent Attorney Mamoru Takeuchi

Claims (2)

[Claims] (1) Mainly vegetable oil with a melting point of 20°C or lower or fatty acids constituting the oil, with a molecular t of 200 to 10
A lubricant for rolling and winding copper or copper alloy, characterized by comprising a product containing ester and amine adduct, which are the reaction products of polyoxyalkylene glycol No. 00 and alkanolamine under an alkali catalyst, and benzotriazole. (2) Vegetable oil or fatty acids constituting the oil is 30%
~80% by weight of polyoxyalkylene glycol 20~
Add 50% by weight and heat at 100-250℃ under alkaline catalyst.
Copper or copper according to claim 1, which is obtained by condensing with 5-20% by weight of alkanolamine, condensing at less than 100°C, and adding 0.05-01% by weight of benzotriazole thereto. Lubricant for rolling and winding of alloys