JPH02269197A - Lubrication composition for sliding and metal working - Google Patents

Abstract

PURPOSE:To obtain the subject composition free from the generation of oil stain, etc., enabling high-precision work and effective in preventing the generation of rust, etc., by compounding a mineral oil, etc., with specific amounts of an extreme-pressure agent, an emulsifier and a reaction product of an aliphatic dicarboxylic acid with an alkanolamine. CONSTITUTION:The objective composition is produced by compounding (A) a base oil composed of mineral oil and/or synthetic oil with (B) 2-50wt.% of a reaction product of a 14-28C aliphatic dicarboxylic acid with an alkanolamine having 2-4C alkanol group, (C) 5-30wt.% of an extreme-pressure agent composed of a sulfurized oil and fat, a phosphoric acid ester, etc., and (D) 5-30wt.% of an emulsifier composed of aliphatic soap, an anionic, cationic or nonionic surfactant, etc.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a lubricating composition for sliding and metal working.

[Prior Art and Problems to be Solved by the Invention] Machine tools use lubricants with a wide variety of different performances depending on the location and purpose of use. Mixing of these lubricants with each other can reduce their respective performance and cause fatal problems, so they must be avoided at all costs.

However, many machine tools, especially transfer machines, require cutting fluids due to their mechanisms.

Sliding surface oils are often mixed into metalworking lubricants such as grinding fluids, and if sliding surface oils are mixed into water-based emulsion type metalworking lubricants, the uniformity of the metalworking lubricant may be affected. This causes problems such as fluctuations in metal processing performance and the inability to perform high-precision metal processing, and (1) accelerated corrosion and extremely shortened lifespan of the metal processing fluid.

[Means to solve the problem]

Therefore, the inventors of the present invention sought to resolve the above-mentioned conventional problems (as a result of extensive research, they discovered that a lubricating composition with a specific composition could be used both as a sliding surface oil and as a metalworking oil). Based on this knowledge, we have completed the present invention.

That is, an object of the present invention is to provide a lubricating composition for sliding and metal working in which the above-mentioned conventional problems are solved by using the same active ingredients in the sliding surface oil and the metal working oil. It is something.

The present invention uses mineral oil and/or synthetic oil, carbon number 14-2.
8 aliphatic dicarboxylic acid and an alkanolamine having an alkanol group having 2 to 4 carbon atoms, an extreme pressure agent, and an emulsifier; 2-50
% by weight, the extreme pressure agent 5 to 30% by weight and the emulsifier 5
This is a lubricating composition for sliding and metal working, which is blended in a proportion of ~30% by weight.

In the present invention, mineral oil and/or synthetic oil is used as the first component. The mineral oil and/or synthetic oil is the base of the lubricating composition of the present invention, and is not particularly limited, but preferably has a viscosity of 5 to 70 cst at 40°C.

Specifically, mineral oils include naphthenic mineral oils, intermediate mineral oils, lubricating oil fractions of paraffinic mineral oils, and highly aromatic components obtained by decomposition of these mineral oils, and synthetic oils include long-chain alkylbenzenes, Examples include branched alkylbenzene, polyolefin oil such as polybutene, alkylnaphthalene, ester oil, and polyglycol oil. Among these, sorcery and phthenic mineral oils are preferred.

The above-mentioned oils can be used alone or in combination of two or more.

In addition, in the present invention, the second component has 14 to 14 carbon atoms.
A reaction product of a 28 aliphatic dicarboxylic acid and an alkanolamine having an alkanol group having 2 to 4 carbon atoms is used. Here, as specific examples of aliphatic dicarboxylic acids, for example, 2 HOOC・(CIRIS・Ctl(CHz)
ic'oOH.

C*Hs HOOC・(CHz)s-CH(CHz) to C0
Oh.

Kuzu C1H, t +! 00c・CCHz)h -CI, CH(CHz
)icOOIl.

HOOC・(CTo)b・CH-CH(CHt)zc
H=HOOC・(Cut)s・CH(CHi)icOO
H.

CI-CH.

CH.
z) z-C1l-C(CH3) -(CI□), -C
Examples include OOH.

As the alkanolamine to be reacted with the aliphatic dicarboxylic acid, those having an alkanol group having 2 to 4 carbon atoms are used. Examples of such alkanolamines include monoethanolamine, jetanolamine, triethanolamine, monopropanolamine, dibrobanolamine, tripropanolamine, monobutanolamine, liptanolamine. Examples include tributanolamine, monomethyljetanolamine, monomethyldibrobanolamine, monomethyldibutanolamine, and monoethyljetanolamine.

The above aliphatic dicarboxylic acid and alkanolamine are the former 1
and the latter at a ratio of 0.5 to 5 (molar ratio) and reacted at a temperature of room temperature to 200°C for 5 to 100 minutes to obtain a reaction product.

In the present invention, the reaction product of the aliphatic dicarboxylic acid and alkanolamine is used as the second component. The reaction product of this aliphatic dicarboxylic acid and alkanolamine is 2 to 50% by weight, preferably 5 to 30% by weight based on the total amount.
% by weight is added.

If the amount of this second component is less than 2% by weight, rust is likely to occur when used as a metalworking fluid (
Moreover, it is not preferable because the metal processing performance deteriorates. Further, even if the amount exceeds 50% by weight, no improvement in the effect can be expected, which is economically undesirable.

Next, in the present invention, an extreme pressure agent is used as the third component. There are no particular restrictions on extreme pressure agents; sulfurized oils and fats such as sulfurized lard, sulfurized whale oil, and sulfurized castor oil; phosphate esters such as tributyl phosphate, tricresyl phosphate, trioctyl phosphate, triphenyl phosphate, lauryl acid phosphate, and oleyl acid phosphate; Examples include phosphoric acid ester/amine salts such as beef tallow amine salt of octyl acid phosphate and oleyl amine salt of oleyl acid phosphate, and these can be used alone or in combination of two or more types.

These extreme pressure agents are blended in an amount of 5 to 30% by weight, preferably 5 to 20% by weight, based on the total amount. When the amount of the extreme pressure agent is less than 5% by weight, it is preferable to use a phosphorus-containing surfactant as an emulsifier. When used as a sliding surface oil, it prevents stick-slip and
This is because, when the diluted liquid is used for metal processing parts, it has the effect of preventing deterioration of machinability. Also, if it is used as a sliding surface oil if it is blended in excess of 30% by weight,
It is undesirable because it tends to cause oil stain and when used as a metalworking fluid, it tends to cause rust and promotes decay.

Furthermore, in the present invention, an emulsifier is used as the fourth component. There are no particular restrictions on the emulsifier; for example, anionic surfactants such as aliphatic soaps, naphthenic acid soaps, long-chain alcohol sulfate salts, aliphatic alkyl sulfate salts; long-chain primary amine salts, alkyl trimethyl ammonium salts, etc. Cationic surfactants such as salts; nonionic surfactants such as polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene alkyl ester, polyoxyethylene alkyl phenyl ester, and dipolyoxyethylene alkyl ether phosphate, dipolyoxyethylene alkyl phenyl ether phosphate, tripolyoxyethylene alkyl ether phosphate,
Examples include phosphorus-containing surfactants such as tripolyoxyethylene alkyl phenyl ether phosphate. These emulsifiers are blended in an amount of 5 to 30% by weight, preferably 10 to 20% by weight, based on the total amount. If the amount of this emulsifier is less than 5% by weight, the resulting lubricating composition will separate, making it impossible to use it as a sliding surface lubricant, and the emulsification stability of the metal working fluid will deteriorate. It can no longer be used for processing. Also, if it is blended in excess of 30% by weight, when used as a sliding surface oil,
This is not preferable because stick-slip occurs.

In addition, in the present invention, an antioxidant is used as necessary.

A copper deactivator, an antifoaming agent, an antibacterial agent, etc. can be added as appropriate.

The sliding and metalworking lubricating composition of the present invention can be obtained by mixing soft earth components.

When the sliding and metal processing lubricating composition of the present invention is used as a sliding surface lubricant, it is usually used as a undiluted solution; when it is used as a metal processing lubricant, it is mixed with water 3 to 100 times, preferably 20 to 5
Preferably, it is diluted 0 times.

When lubricating a machine tool using the lubricating composition of the present invention, the lubricating composition is used on the sliding surfaces of the machine tool, and a water diluted solution of the lubricating composition is used on metal processing parts. Here, the target machine tools are those that have sliding surfaces and metal processing parts inside them, and transfer machines in particular are examples of transfer machines in which sliding surface oil is likely to mix with metal processing oil due to their mechanism. .

When lubricating a machine tool using the lubricating composition of the present invention, a stock solution of the lubricating composition is used on the sliding surface of the machine tool. Also, a diluted solution of the lubricating composition is applied to metal working parts. Here, when used for metal processing such as cutting and grinding, a water-diluted solution whose diameter is increased by about 3 to 100 times with water is used. When lubricating a transfer machine, first, a stock solution of the lubricating composition of the present invention is used on sliding surfaces, and then a diluted solution of the lubricating composition is used to perform metal working.

〔Example] Next, the present invention will be explained by examples.

Examples 1 to 6 and Comparative Examples 1 to 6 In the predetermined mineral oil or synthetic oil (first component) shown in Table 1,
A lubricating composition was prepared by blending the predetermined compounds shown in Table 1 in a predetermined ratio.

Next, various tests shown below were conducted on these lubricating compositions to evaluate their performance as sliding surface oils and as metalworking oils. The results are shown in Table 1.

〔Test method〕

■Sliding surface test Idemitsu method (method in accordance with ASTM D 2877-70 with the following conditions (Idemitsu Tribo Review V
The coefficient of dynamic friction (μ) and the presence or absence of stick-slip were measured. Note that the conditions are as follows.

Surface pressure: 0.54 kg/cd Sliding speed: 12nu*/min and 160 tms
/min Surface material: Vera) 345C polished steel plate (JIS G 4051) Saddle FC-20 scraped surface (JIS G 5501) ■Oil stain performance test Add 5% by weight of distilled water to the stock solution of the above lubricating composition and stir. , the emulsified liquid was placed on two FC-20 plates (JIS
G 5501) (30X70X10++n) and maintained at a temperature of 60°C for 5 days. After opening, the presence or absence of oil stain was observed.

■Copper plate corrosion test Conducted according to JIS K 2513. However, the conditions were 50°C for 3 hours.

■Cutting test carbide tip (P2O...JIS B 4104)
We conducted a cutting test using a lathe and measured the tool wear. Note that 30% emulsion was used as the sample, and the cutting conditions were as follows.

Cutting speed: 100 m/+++in Feed rate: 0
, laws/ray.

Depth of cut: 211I11 Cutting distance: 4800 m ■Initial emulsification stability test Take 97 m2 of water in a 100 m1 measuring cylinder, pour 3 ml of the stock solution of the above lubricating composition onto the water surface, and after 30 minutes, oil (stock solution) will appear on the top. It was observed whether there was any floating separation (initial emulsifying property). In addition, the proportion (capacity) (solubility) of the oil agent dispersed or dissolved in water was measured. Note that the stock solution that can be used in the present invention requires that no oil is dispersed in the upper layer and that the dispersion or dissolution ratio of the oil agent is 30 m2 or more.

■Rust prevention test A cutting test was conducted using samples with each degree of emulsion.
After 7 days, the presence or absence of rust on the cut material (chips) was observed. The cutting test was conducted using an end mill tool on a drilling machine, and FCD-4
This was done by cutting 0 material (JIS G 5502).

Comparative Example 7 Various tests were conducted in the same manner as in Example 1, except that a commercially available product was used, and the performance was evaluated. The results are shown in Table 1.

α-olefin oligomer (viscosity 8 cst (100
"C)) *2 HOOC(CL)s・CH(CHz)+.C0OHC,
1:2 (molar ratio) reaction product of HS *3 *4 *5 and jetanolamine HOOC(Cl(t) s CH(CHt)icOOR
■ 1=3 (molar ratio) reaction product of ClHs and jetanolamine polyoxyethylene nonylphenyl ether (n=2)
and polyoxyethylene nonylphenyl ether (n=4
) (n: average number of added moles of ethylene oxide) This shows the degree of corrosion, with 1a being almost no corrosion, and the following 1b, 2a, and 2b.

Corrosion progresses as 3a, 3b, 4a, etc. [Effects of the Invention] According to the lubricating composition of the present invention, one oil can function as a sliding surface oil and a metal working oil. That is, even when used as a sliding surface oil, oil stain does not occur, and when used as a metal working oil, metal processing can be performed with high precision and rust is less likely to occur.

In addition, since this type of oil can be used as both a sliding surface oil and a metal processing oil, even if the sliding surface oil mixes with the metal processing oil, the metal processing performance of the machine tool will not deteriorate, or the metal processing performance of the machine tool will deteriorate.
There are no lubrication problems that have been seen in the past, such as the extremely shortened lifespan of metalworking fluids. Therefore 1. This is particularly effective when using a metalworking oil in a circulating lubrication system.

Furthermore, although the lubricating composition for sliding and metal processing of the present invention is an emulsion type lubricant, it also exhibits good performance when used as a sliding surface oil as described above. It can be effectively used for lubrication of transfer machines, etc.

Claims (1)

[Claims] (1) Consists of mineral oil and/or synthetic oil, a reaction product of an aliphatic dicarboxylic acid having 14 to 28 carbon atoms and an alkanolamine having an alkanol group having 2 to 4 carbon atoms, an extreme pressure agent, and an emulsifier; On the other hand, 2 to 50% by weight of the reaction product of the aliphatic dicarboxylic acid and alkanolamine, 5 to 30% by weight of the extreme pressure agent, and 5 to 3% of the emulsifier.
A lubricating composition for sliding and metal processing, which is blended at a ratio of 0% by weight.