KR20070087870A - Pro-circumstantial lubricatig oil - Google Patents

Abstract

An environment-friendly and flame-resistant composition of hydraulic working fluid is provided to improve an environment-friendly effect and to secure good flame resistance, lubricating ability, and thermal and oxidative stability by adding vegetable oil. An environment-friendly and flame-resistant composition of hydraulic working fluid is produced by adding 0.1~20wt.% of an antioxidant, 0.1~15wt.% of a wear resistant additive, and 0.1~15wt.% of a thickening agent to 50~99.9wt.% of one or at least one lubricating base oil selected from a group comprising vegetable oil and synthetic polyol ester. The vegetable oil is one of rape seed oil, canola oil, sunflower oil, caster oil, soybean oil, olive oil, jatropha curcas oil, and palm oil. The synthetic polyol ester is neopentyl glycol ester, trimethylol propane ester, or pentaerythritol ester.

Description

Environment-friendly, flame-retardant industrial lubricant composition {Pro-circumstantial lubricatig oil}

The present invention relates to an industrial lubricating oil composition, in which 50 to 99.9 parts by weight of one or more lubricant base oils selected from the group consisting of vegetable oils and synthetic polyol esters, 0.1 to 20 parts by weight of antioxidants, 0.1 to 15 parts by weight of antiwear additives and thickeners It relates to an industrial lubricating oil composition prepared by adding 0.1 to 15 parts by weight.

Today, the emphasis on affinity for the natural environment and the human body is becoming a prerequisite. The economic growth of mankind The development of science and technology has made the materials made for human beings not only the destruction of the ecosystem but also a threat to the survival of human beings. Oil leakage has led to the destruction of ecosystems due to poor biodegradability. In addition, the development of high temperature and high pressure equipment in the industrial development process is increasing, and the need for the supply of lubricating oil to more actively cope with the risk of fire. In particular, the lubricating oil is more necessary because of its faster burning than other materials.

The present invention relates to an industrial lubricating oil composition developed according to the necessity as described above, and more particularly, to introduce vegetable fats and oils to emphasize environmental friendliness, as well as flame retardancy (less risk to fire). Industries that have good lubricity, heat, oxidation stability, and other physical properties relate to lubricating oil compositions.

In this way, by introducing lubricating oils by "introducing vegetable fats and oils that are degradable by microorganisms and emphasizing affinity for humans", first, environmental and human friendliness is recognized, and second, at the same time, conditions that can actively cope with the risk of fire I could be satisfied.

On the other hand, in addition to the vegetable fats and oils as described above, the applicant solved the defects of the conventional petroleum hydraulic oil, the polyol ester hydraulic oil (Korea Patent No. 88842), an environmentally-friendly hydraulic oil (Korea Patent No. 88842), a more advanced form of high temperature-catalyst reaction The hydraulic oil (Korean Patent No. 169565) and the polyol ester synthesized in a non-catalytic and catalytic atmosphere using a mixed fatty acid and a polyhydric alcohol in which a polymer acid and a dibasic fatty acid are introduced into monobasic higher fatty acids are used as lubricating base oils. By using the polyol ester of the hydraulic hydraulic oil composition (Korean Patent 201759), which overcomes the shear phenomenon generated in the process of using the lubricating oil as a base oil can have the same effect.

This industrial lubricating oil composition mainly targets hydraulic oil. Sliding surface oil and other mechanical lubricants.

Lubricant base oil for the present invention includes vegetable oils (vegetable oil (specifically, Canola Oil), sunflower seed oil, vegetable oils extracted from plants such as Jatropha Oil, castor oil and soybean oil) that can be obtained in nature, by the present inventors It is obtained by blending the developed polyol ester (Korean Patent Nos. 88842, 169565 and 201759) with an appropriate amount of antioxidants, anti-wear additives, thickeners and other additives.

Vegetable fat and oil refers to a compound of the triglyceride form having the chemical structure of Formula I, and means fat itself that can be obtained through the purification of seeds, fruits and plants themselves, These fats and oils can be used for both edible and industrial purposes. The types and main characteristics of these lubricant base oils are summarized in Table-1 below.

Antioxidants have the best effect of phenylnaphthylamine (formula II), but metallated salts of alkylated diphenylamine (formula III), phenolic (formula IV), phosphate esters and phosphate esters (eg : Antioxidants, such as Zn-DTP), can also be used together. The addition amount is 0.1-10.0 weight part, Preferably it is 0.5-3.5 weight part. In general, less than 0.5 parts by weight is less effective, if more than 7.0 parts by weight of the antioxidant effect can be expected, but problems such as discoloration of the emulsion, flame retardant effect and degradation of environmental friendliness may be raised.

As an antiwear additive, the effect of the amine salt of a phosphate ester (formula IV) is the most favorable, and the aryl phosphate type, the metal salt of a phosphate ester, and the additive of a sulfide may be used together. The addition amount is 0.1-7.0 weight part, Preferably it is 0.3-2.0 weight part.

As the thickener (viscosity index improver), an olefin copolymer (formula VI), polymethacrylate, or the like may be used.When using the polymethacrylate, a molecular weight of 100,000 or less having excellent shear stability and low viscosity change is preferably 5 Less than 10,000 is suitable. At this time, the low molecular weight and high molecular weight thickener combinations can complement both low temperature fluidity and viscosity index. The addition amount depends on the target viscosity of the lubricating oil composition, but is preferably 0.1 to 5.0 parts by weight, and preferably 0.5 to 3.0 parts by weight. In the present invention, 0.01 to 2.0 parts by weight of a corrosion inhibitor, an antifoaming agent and other modifiers may be added as necessary. The above-mentioned additives are very necessary in the lubricating oil composition, but when used in excess of the appropriate range, it may cause the degradation of the environmental friendliness, the reduction of the flame retardant effect, the viscosity drop by the shear, the generation of the residue and the discoloration of the emulsion, and the like. Appropriate combinations with additives must be considered.

Table-1. Selection of Lubricant Base Oil

Example

1) Selection of Lubricant Base Oil

A) vegetable oil

Vegetable oil means fat itself which can be obtained through the process of refining seeds, fruits, and the plant itself, and can be used for edible or industrial purposes. Filtering process ensures that there is no foreign matter.

Vegetable oil applied to the invention requires the following characteristics in addition to the above-described main characteristics.

① Rapeseed oil (Other rape oil and crude oil except canola oil)

It is a vegetable oil obtained from fluid seeds, and raw materials having the following characteristics are used for both edible and industrial uses.

Specific gravity (15.4 ° C) 0.90 to 0.93 Refractive index (25 ° C): 1.45 to 1.49

Flash point (C.O.C): 250 ° C or higher

Viscosity index: over 180

① Sunflower Seed Oil

Vegetable oil obtained from sunflower seeds, raw materials having the following characteristics were used.

Specific gravity (154 ° C): 0.90 to 0.93 refractive index (25 ° C: 1.45 to 1.50

Flash point (C.O.C): 250 ° C or higher

Viscosity index: over 180

③ Castor Oil

It is a vegetable oil obtained from castor seeds, and raw materials having the following characteristics were used.

Specific gravity (15.4 ° C): 0.93 to 0.98 refractive index (25 ° C): 1.45 to 1.50

Flash point (C.O.C): 260 ° C or higher

Kinematic viscosity (40 ℃, cSt): 220 ~ 280 Pour point (℃):-7.5 or less

④ Soybean oil

It means Soy Bean Oil obtained from soybean, and raw materials with the following characteristics were used.

Specific gravity (15.4 ° C): 0.91 to 0.93 Refractive index (25 ° C): 1.45 to 1.49

Flash point (C.O.C): 240 ℃ or higher

Viscosity Index: 195∼ 225

⑤ olive oil

Vegetable oil obtained from the seed of olive, using the raw material of the following characteristics.

Flash point (C.O.C): 250 ℃ or higher

Viscosity Index: 195∼ 225

⑥ Jatropha Oil

Vegetable oil derived from Jatropha seeds. Raw materials with the following characteristics were used.

Specific gravity (15.4 ° C): 0.91 to 0.93 Refractive index (25 ° C): 1.45 to 1.49

Flash point (C.O.C): 240 ℃ or higher Viscosity index: 195∼225

⑦ Other: Palm, Palm kernel, Coconut, etc.

Raw materials refined to be applicable for industrial lubricating oil (hydraulic hydraulic oil) were used.

B) Polyol-Ester

The raw materials at the time of patent acquisition, and the classification according to the manufacturing method are shown in the following table, and the physical properties of each raw material follow the contents described in each patent.

Table-2: Korean Patent Nos. 88842 and 169565: A-1 to A-8

Table-3: Korean Patent No. 201759 B-1 to B-18

2) Preparation of Lubricant Compositions

About the lube base oil compound obtained in Table-1, it mix | blends as Table-4-Table-8, and measured the physical property value and performance about each. The results are shown in Tables 9 to 14.

Table-4 Example of Combining Canola Oil and Antioxidants

Table-5 Example of Combining Sunflower Seed Oil with Antioxidant

Table-6 Example in which olive oil and antioxidants are combined

Table 7 Example of Soybean Oil Blended with Antioxidants

Table-8 Example of Combining Castor Oil and Antioxidant

Table -9: Properties and Performance of Lubricant Compositions Combining Canola Oil and Antioxidants

Table-10: Properties and Performance of Lubricant Compositions Combining Sunflower Seed Oil and Antioxidants

Table -11: Properties and Performance of Lubricant Compositions Containing Olive Oil and Antioxidants

Table -12: Properties and Performance of Lubricant Compositions Combining Soybean Oil and Antioxidants

Table 13: Physical properties and performance of lubricating oil composition blended with castor oil and antioxidant

Biodegradable was measured to confirm environmental friendliness of the industrial lubricating oil composition blended as shown in Tables 4 to 8, and the measurement methods and results are as follows.

          Table 14 Biodegradable Measurements

As such, production of an environmentally friendly lubricant composition having a biodegradability of more than 90% is possible.

As seen above, the product has a biodegradation of more than 90%, enabling the production of environmentally friendly lubricants.

Claims (7)

Prepared by adding 0.1 to 20 parts by weight of antioxidant, 0.1 to 15 parts by weight of antiwear additive and 0.1 to 15 parts by weight of thickener to 50 to 99.9 parts by weight of one or more lubricant base oils selected from the group consisting of vegetable oils and synthetic polyol esters. Industrial lubricant composition, characterized in that. The industrial lubricating oil composition of claim 1, wherein the vegetable oil is rapeseed oil, canola oil, sunflower oil, castor oil, soybean oil, olive oil, jatropha oil or palm oil. The industrial lubricating oil composition according to claim 1, wherein the synthetic polyol ester is neopentyl glycol ester, tri methylol propane ester, pentaerythritol ester. According to claim 1, wherein the antioxidant is an industrial lubricating oil composition, characterized in that the metal salt of the Aromatic amine-based, Phenol-based phosphate ester of the formula (I)

The lubricating oil composition of claim 1, wherein the antiwear additive is an antiwear additive of a phosphate ester-amine salt of the following formula (II), an aryl phosphate type, and a sulfide.

The industrial lubricating oil composition according to claim 1, wherein the thickener is an olefin copolymer or acrylate thickener additive of formula (III).

The industrial lubricant composition of claim 1 prepared by mixing 0.3-32.9 parts by weight of a corrosion inhibitor, an antifoaming agent and a performance improving agent.