KR930004164B1 - Cold rolling oil composition - Google Patents

Abstract

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Description

Cold rolled oil composition

1 is a graph showing performances of Examples 1 to 3 and Comparative Examples 1 to 3. FIG.

[Industrial use]

The present invention relates to cold rolled oil compositions. Therefore, this invention can be utilized in the industry which manufactures a lubricant, and the industry which processes a metal.

[Prior art]

In general, cold rolled oils are based on fats, oils, fatty acid esters, mineral oils, and the like, and oil-based oil additives such as fatty acids and alcohols, extreme pressure additives, rust inhibitors, antioxidants, etc. In general, it is used at a concentration of 1 to 10% by weight.

On the other hand, in recent years, with the rapid progress of rolling equipment and technology, the high speed and mass production of rolling are aimed at, and the demand for rolling oil, such as lubricity and workability, is increasing.

However, in the rolling oil using the conventional emulsifier, the adhesiveness with respect to the surface of a rolling material and the circulating stability of a kulent show the characteristic opposite. In other words, if the type and amount of emulsifier are adjusted to increase the circulating stability of the coulent, the adhesion to the surface of the rolled material is reduced and the lubricity is insufficient. This deterioration causes a problem in long-term circulation use, and at the same time, defects such as deterioration of the workability and the surface quality of the rolled material occur.

As a rolling oil composition for eliminating the above drawbacks, there is a composition disclosed in Japanese Patent Laid-Open No. 62-112695. The composition comprises (a) one or two or more base oils selected from the group consisting of fats and oils, fatty acid esters and mineral oils, and (b) one and two or more dispersants of salts of ethylene oxide adducts of amino compounds as essential ingredients. It is a cold rolled oil composition characterized by the above-mentioned. And in this composition, it is recommended that the addition amount of a dispersing agent is 0.5 to 10 weight% of the whole quantity of cold rolling oil compositions.

However, in this rolling oil composition, particle size distribution and Emulsion Stability Index (abbreviated as "ESI") are changed by mixing the wear powder which arises at the time of rolling process into a coulomb powder, Emulsification stability is reduced. In particular, when the fluidity of the liquid is insufficient due to the structure of the kuletant tank or the stirring state in the tank, the ESI is low, so that the rolling oil separates and floats in the tank, so that the concentration of the rolling oil supplied to the rolling mill by the pump decreases. . For this reason, the adhesiveness of the rolling oil with respect to the surface of a rolling material falls, and there existed a fault which the fall of lubricity, rolling material surface quality, or workability generate | occur | produces.

[Problem Solving the Invention]

The present invention provides a cold rolled oil having no above-mentioned drawbacks, that is, a cold rolled oil which is stable even in the presence of wear powder and which is more excellent in lubricity.

MEANS TO SOLVE THE PROBLEM As a result of earnestly researching in order to solve the fault of the said conventional rolling oil, the fault of the said conventional rolling oil is eliminated by adding wax oxide of 60 degrees C or less to the composition disclosed by Unexamined-Japanese-Patent No. 62-112695. It was found that this can be done, and thus, the present invention has been completed.

That is, the present invention is (a) one or two or more base oils selected from the group consisting of fats and oils, fatty acid esters and mineral oils, (b) wax oxides having a melting point of 60 ° C. or lower, and (c) the following general formulas (I) or ( The present invention relates to a cold rolled oil composition comprising one or two or more dispersants of a salt of an ethylene oxide adduct of the amino compound represented by II) as an essential component.

(Wherein R represents an alkyl group having 12 to 18 carbon atoms, and a + b and c + d + e each represent an integer of 5 to 20).

The components of the present invention are listed below.

As the base oil of the cold rolled oil composition of the present invention, for example, mineral oil such as the machine dielectric of Japanese Industrial Standard (JIS) K2238, the turbine dielectric of JIS K2213, tallow, plum soybean oil, rapeseed oil, castor oil, rice bran oil And esters of fatty acids and carbon atoms having 1 to 22 aliphatic alcohols obtained from animal and vegetable fats and oils such as palm oil and farad oil, and those of animal and vegetable fats and oils. Examples of the aliphatic alcohols include monohydric alcohols such as methanol, ethanol, propanol, butanol, octyl alcohol, oleyl alcohol and stearyl alcohol, and ethylene glycol, neopentyl alcohol and penta erythritol. Polyhydric alcohols and the like can be exemplified.

The wax oxide in the present invention is used in combination with a dispersant which is an essential component of the present invention, that is, a salt of the ethylene oxide adduct of the specific amino compound of component (c), and exhibits the effect of retaining emulsion stability. As the wax oxide of the present invention, waxes of natural or synthetic waxes, paraffin oxide, pentrolactam oxide and the like can be used. Moreover, it is necessary that melting | fusing point of these wax oxides is 60 degrees C or less. In general, since cold rolled oil is circulated and used as a kurant with a temperature of 60 ° C. or lower, when the melting point of the oxide wax exceeds 60 ° C., a part of it precipitates and the emulsion stability becomes poor.

In the cold rolled oil composition of the present invention, the salt of the component (bottom), i.e., the ethylene oxide adduct of the amino compound, acts as a dispersant. Ethylene oxide adducts of amino compounds are commercially available as ethylene oxide adducts of amines such as yacyamine, uziamine, laurylamine, or oleyl amine, or yaxypropyrenziamine, ujipropyleneziamine and laurylpropyl. What is marketed can be used as an ethylene oxide adduct of geoamines, such as a benzene amine and an oleyl propylene ziamine. In preparing the salt of the ethylene oxide adduct of an amino compound, what is necessary is just to react the ethylene oxide adduct of an amino compound with an acid. Acids that may be used at this time include phosphoric acids, boric acid, mono or dialkyl acidic phosphates having 2 to 3 carbon atoms, lower to intermediate carboxylic acids (e.g. fatty acids such as formic acid, acetic acid, propionic acid, octylic acid, Dicarboic acid such as potassium oxate, succinic acid, and maronic acid, glycolic acid, lactic acid, oxyacids such as α-oxybutyric acid and myriac acid, and the like.

[Composition Method]

The cold rolled oil composition of this invention mixes the said base oil, wax oxide, and a dispersing agent, and, if needed, adds well-known various additives (for example, oil-based improvement agent, extreme pressure agent, antirust agent, antioxidant, surfactant, etc.). In the composition, it is preferable that the amount of the dispersant added is 0.5 to 10% by weight of the total amount of the cold rolled oil composition, and if the amount of the dispersant is less than 0.5% by weight, the cold rolled oil composition is not dispersed well in water and exceeds 10% by weight. This becomes too small and the plate outerity falls, and the lubrication performance of cold rolling oil is impaired.

[Optional additive]

The following can be used as various additives used for the composition of this invention. As an oil-based enhancer, esters with higher fatty acids, such as oleic acid and stearic acid, dima acid, said acid and monohydric alcohol, said acid and polyhydric alcohol (for example, a pentaerythrite, a trimetholpropane), etc. Examples of extreme pressure agents include trialkyl phosphate, dialkyl phosphate, triaryl phosphate, and other phosphate compounds. As antioxidants, phenyl α-naphthylamine, 2,6-di-t-butyl-p-cresol, etc. Aromatic amines, such as a phenol type compound and phenyl- alpha-naphthylamine, etc. are illustrated, respectively.

[How to use]

The cold rolled oil composition of this invention is used, diluted in water at the time of use. The concentration at the time of use is 0.5-10 weight%.

EXAMPLE

Next, an Example and a comparative example (that is, the Example of the composition of Unexamined-Japanese-Patent No. 62-112695) are shown, and this invention is concretely demonstrated to it. However, the following Examples and Comparative Examples do not limit the invention of any kind.

Example 1

Uji… … … … … … … … … … … … … … … … … … … … … … … … … … … 91 parts by weight

Oxidized Petrotam (Melting Point 50 ℃, Nippon Lap Co., Ltd.) … … … … … … … … … 3 parts by weight

2-ethylhexyl acid salt of ethylene oxide adduct (5 moles of added mole) of soybean amine. 1 part by weight

2-ethylhexyl acid salt of ethylene oxide adduct (15 mol of added mole number) of soybean amine ... 2 parts by weight

Monooleate of Pentaerythritol… … … … … … … … … … … … … … … 3 parts by weight

Example 2

Uji… … … … … … … … … … … … … … … … … … … … … … … … … … … … 89 parts by weight

Petroleum oxide (melting point 50 ° C, Nippon Lap Co., Ltd.) … … … … … … … … … … 5 parts by weight

Didodecyl Acid Phosphate Esters of Ethylene Oxide Additives (5 moles Added) of Yashiamine. 1.5 parts by weight

Didodecyl acidic phosphate ester salt of ethylene oxide adduct (10 mol of added moles) of palm oil amine ... 1.5 parts by weight

Monooleate of pentaerythritol … … … … … … … … … … … … … … 3 parts by weight

Example 3

Uji… … … … … … … … … … … … … … … … … … … … … … … … … … … 93.5 parts by weight

Oxide Wax (melting point 42 ℃, Nippon Lap Co., Ltd.) … … … … … … … … … … … 3 parts by weight

Maronate of the ethylene oxide adduct (5 mol of added moles) of oleyl propylene diamine ... 1 part by weight

Maronate of the ethylene oxide adduct (20 mol of added moles) of an oleyl propylene diamine ... 2.5 parts by weight

Comparative Example 1

Uji… … … … … … … … … … … … … … … … … … … … … … … … … … … 94 parts by weight

2-ethylhexyl acid salt of ethylene oxide adduct (5 mol of added moles) of soybean amine. 1 part by weight

2-ethylhexyl acid salt of ethylene oxide adduct (15 mol of added mole number) of soybean amine ... 2 parts by weight

Monooleate of Pentaerythritol… … … … … … … … … … … … … … … 3 parts by weight

Comparative Example 2

Uji… … … … … … … … … … … … … … … … … … … … … … … … … … … … 94 parts by weight

Dodecyl Acid Phosphate Esters of Ethylene Oxide Additives (5 moles Added) of Yashiamine. 1.5 parts by weight

Dodecyl Acid Phosphate Esters of Ethylene Oxide Additives (10 moles Added) of Yashiamine. 1.5 parts by weight

Monooleate of pentaerythritol … … … … … … … … … … … … … … 3 parts by weight

Comparative Example 3

Uji… … … … … … … … … … … … … … … … … … … … … … … … … … … 96 parts by weight

Malonate of an ethylene oxide adduct (5 mol of added moles) of an oleyl propylene diamine. 1 part by weight

Malonate of the ethylene oxide adduct (20 mol of added mole number) of oleyl propylene diamine ... 2.5 parts by weight

Thus, the following performance test was done about each composition of Example 1-3 and Comparative Example 1-3 which can be obtained. This result is shown in FIG. 1 and FIG. After stirring and adjusting the 3 weight% emulsion of each composition with a stirrer (M-type homomixer), it adjusted, and it added 2000 ppm of fine particle iron powders (particle diameter: 0.02-0.03 micrometer), and also stirred for 2 hours. E.S.I. before and after particulate iron. And dispersion oil particle size was measured. Test conditions and E.S.I. The measuring method of the particle diameter was as follows.

Stirrer speed: 10,000rpm

Liquid volume: 800g

Liquid temperature: 50 ℃

E.S.I. : After 200 ml of the emulsion was placed in a cylindrical separating lot, the lower layer 100 ml was taken 15 minutes later, the oil concentration was measured, and E.S.I. was calculated by the following formula.

Particle size: Coulter counter

[Table 1]

As apparent from the results of the first table, even when the cold rolled oil composition of the present invention is mixed, the decrease in E.S.I. is small and excellent in emulsion stability.

The cold rolled oil composition of the present invention does not have a drop in the concentration of the coultant delivered to the mill or the separation of the rolled oil in the tank even when it is circulated for a long time under conditions in which the stirring efficiency in the kulent tank is poor. As a result, the emulsion injection state can be kept stable. As a result, it is possible to improve the workability of rolling, stabilize the rolling lubrication performance, and manufacture steel sheets of high precision and high quality.

Claims (1)

(A) one or two or more base oils selected from the group consisting of fats and oils, fatty acid esters and mineral oils, (b) wax oxides having a melting point of 60 ° C. or lower and (c) represented by the following general formulas (I) or (II): One or two or more dispersants of salts of ethylene oxide adducts of amino compounds

(Wherein R represents an alkyl group having 12 to 18 carbon atoms, and a + b and c + d + e each represent an integer of 5 to 20). Cold rolling oil composition characterized in that it contains as an essential component.

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