KR100486626B1 - Composition of metal working fluid - Google Patents

Abstract

The present invention relates to a metal covalent composition containing a methyl ester of vegetable oil.

Description

Environmentally Friendly Metal Working Fluids

The present invention relates to a metal covalent composition, and more particularly to a composition of an environmentally friendly metal covalent sharing using a methyl ester of vegetable oil.

Base oils currently used in industrial applications are mostly made up of mineral oil-based petroleum hydrocarbon-based lubricating additives and rust preventing additives. However, this can lead to depletion of resources and damage to the environment and can endanger the health of those who use it. On the other hand, recycled vegetable oils extractable from vegetable oils or waste cooking oils are not harmful to humans and are being studied as environmentally friendly alternatives to petroleum hydrocarbons. The main component of vegetable oil is triacylglycerol, which is easily biodegradable, has low toxicity, and is easy to adsorb on metal surface due to the presence of intramolecular polar hydrocarbons, so that it has better lubricity, permeability and rust resistance than mineral oil. However, there are problems such as fluidity deterioration and oxidation stability at low temperatures, and there has been a problem in that it is limited to be applied to the metal-covalent industrial use.

Recently, as part of efforts to improve low temperature fluidity and low oxidation stability of vegetable oils, studies on oils which improve the lubricity at low temperatures of triacylglycerol-containing oils by transesterifying vegetable oils with short-chain fatty acid esters are ongoing. Although the methyl ester of vegetable oil used in the present invention is a substance obtained by reacting the vegetable oil with alcohol as described above, it is an ester developed for the purpose of using it as a base oil of environmentally friendly metal-valent covalent acid, Methylinoleate is composed of more than 97% of the main component.

Fatty acids and chemical structures that can be used for metal covalents

Fatty acid name Carbon number and double bond number Chemical structure Caprylic C8 CH ₃ (CH ₂ ) ₆ COOH Capric C10 CH ₃ (CH ₂ ) ₈ COOH Lauric C12 CH ₃ (CH ₂ ) ₁₀ COOH Myristic C14 CH ₃ (CH ₂ ) ₁₂ COOH Palmitic C16: 0 CH ₃ (CH ₂ ) ₁₄ COOH Palmitoleic C16: 1 CH ₃ (CH ₂ ) ₅ CH = CH (CH ₂ ) ₇ COOH Stearic C18: 0 CH ₃ (CH ₂ ) ₁₆ COOH Oleic C18: 1 CH ₃ (CH ₂ ) ₇ CH = CH (CH ₂ ) ₇ COOH Linoleic C18: 2 CH ₃ (CH ₂ ) ₄ CH = CHCH ₂ CH = CH (CH ₂ ) ₇ COOH Linolenic C18: 3 CH ₃ (CH ₂ ) ₂ CH = CHCH ₂ CH = CHCH ₂ CH = CH (CH ₂ ) ₇ COOH Arachidic C20: 0 CH ₃ (CH ₂ ) ₁₈ COOH Eicosenoic C20: 1 CH ₃ (CH ₂ ) ₇ CH = CH (CH ₂ ) ₉ COOH Behenic C22: 0 CH ₃ (CH ₂ ) ₂₀ COOH Erucic C22: 1 CH ₃ (CH ₂ ) ₇ CH = CH (CH ₂ ) ₁₁ COOH

The methyl ester of vegetable oil has excellent lubricity and improves the low temperature fluidity of the existing vegetable oil, and has a relatively high oxidative stability due to its low unsaturation in the molecule compared to vegetable oil.

The basic synthesis method of methyl ester of vegetable oil is vegetable oil. Soybean oil, edible oil, rapeseed oil, sunflower oil, palm oil, corn oil, etc. are transesterified with methanol in the presence of a catalyst. In this case, a method of obtaining fatty acid methyl ester having a purity of 97% or higher after separating glycerin is generally purified.

Methyl esters of vegetable oils are harmless to the human body, are environmentally friendly, biodegradable, and have excellent lubricity, and are a suitable raw material for metal covalent supplementation, which is complemented with the advantages of low-temperature fluidity and oxidation stability. Therefore, in view of the present invention, the methyl ester of vegetable oil is used to replace 90-100% of the base oil of lubricating oil, and a small amount of other additives are formulated to provide a composition for metal covalent sharing with excellent lubricity, rust preventing property and cleanability. It was a technical problem.

The present invention relates to a metal covalent composition containing a methyl ester of vegetable oil. The present invention provides a metallurgical composition for lubrication of a methyl ester of vegetable oil, further comprising 1.0 wt% to 35.0 wt% of sorbitan ester and 0.1 wt% to 1.0 wt% of an antioxidant and 100.0 wt% or 64.7 wt% to 98.7 wt%. It is about. In the present invention, the vegetable oil is preferably soybean oil, edible oil, rapeseed oil, sunflower oil, palm oil or corn oil.

In addition, the present invention is 49.7 wt% to 89.7 wt% of methyl ester of vegetable oil, 5.0 wt% to 15.0 wt% of rust additive in addition to 5.0 wt% to 35.0 wt% of sorbitan ester and 0.1 wt% to 1.0 wt% of antioxidant It relates to a mixed anticorrosive metal covalent composition. In addition, the present invention is 30.0 wt% to 87.2 wt% of methyl ester of vegetable oil, 1.0 wt% to 15.0 wt% of sorbitan ester, 0.1 wt% to 1.0 wt% of antioxidant and 1.0 wt% to 10.0 wt% of rust additive, The isoparaffin-based odorless solvent 10.0% to 70.0% by weight and 0.1% to 1.0% by weight of the surfactant diol compound further relates to a cleaning metal-covalent composition. Hydrocarbon composition of vegetable oil and fat that can be used as a component of the metal covalent in the present invention is as follows.

fatty acid Fatty oils and fats C8: 0 C10: 0 C14: 0 C16: 0 C16: 1 C18: 0 C18: 1 C18: 2 C18: 3 C20: 0 C22: 0 C20: 1 C22: 1 Palm oil 5-9 4-10 44-51 13-18 7-10 - 1-4 5-8 1-3 - - - Palm Kernal oil 2-4 3-7 45-52 14-19 6-9 0-1 1-3 10-18 1-2 - 1-2 - Palm oil - - - 1-6 32-47 - 1-6 40-52 2-11 - - - Safflower oil - - - - 5.2 - 2.2 76.3 16.2 - - - Peanut oil - - - 0.5 6-11 1-2 3-6 39-66 17-38 - 5-10 - Cottonseed oil - - - 0-3 17-23 - 1-3 23-41 34-55 - - 2-3 Corn oil - - - 0-2 8-10 1-2 1-4 30-50 34-56 - - 0-2 Sunflower oil - - - - 6.0 - 4.2 18.7 69.3 0.3 1.4 - Soybean oil - - - 0.3 7-11 0-1 3-6 22-34 50-60 2-10 5-10 - Rapeseed oil - - - - 2-5 0.2 1-2 10-15 10-20 5-10 0.9 50-60 Linseed oil - - - 0.2 5-9 - 0-1 9-29 8-29 45-67 - - Mustard - - - - 3.0 - 1.5 15-60 12 5-10 - 10-60

The present invention relates to a lubricated metal rust preventive oil composition using a small amount of other additives, which are entirely substituted with methyl esters of vegetable oils as a base oil, which is a main component of metal covalently, and is not harmful to human body. The present invention uses 100.0% by weight of methyl ester of vegetable oil or 64.7% to 98.7% by weight of methyl ester of vegetable oil, 1.0% to 35.0% of sorbitan ester, and 0.1% to 1.0% of antioxidant. It is related with the mixed lubrication type metalworking share.

The present invention uses methyl ester of vegetable oil alone or 64.7 wt% to 98.7 wt% as base oil. The methyl ester of the vegetable oil is a base oil which can be represented by the following structural formula (1).

[Formula 1]

Methyl Oleate: CH _3- (CH ₂ ) ₆ -CH ₂ -CH = CH-CH _2- (CH ₂ ) ₆ -COO-CH ₃

Methyl Linoleate: CH _3- (CH ₂ ) ₃ -CH ₂ -CH = CH-CH ₂ -CH = CH-CH _2- (CH ₂ ) ₆ -COO-CH ₃

The present invention uses 1.0 to 35.0% by weight of the polysaccharide sorbitan ester. The polysaccharide sorbitan ester used in the present invention can be represented by the following structural formula (2).

[Formula 2]

In the present invention, 0.1 wt% to 1.0 wt% of 2,6-ditertiary butyl-p-cresol is used as an antioxidant. The antioxidant used in the present invention can be represented by the following structural formula (3).

[Formula 3]

The present invention relates to the rust-proof metal covalent sharing of petroleum base oils and petroleum-based solvents with methyl esters of vegetable oils and using small amounts of other additives that are not harmful to humans. The present invention relates to an anticorrosion type metalworking share comprising a mixture of wt% to 89.7 wt%, sorbitan ester 5.0 wt% to 35.0 wt%, antioxidant 0.1 wt% to 1.0 wt%, and antirust additives from 5.0 wt% to 15.0 wt%. .

The present invention is the same base oil as shown in the structural formula (1) using 49.7% by weight to 89.7% by weight of methyl ester of vegetable oil as the base oil. The composition of the present invention uses 5.0 wt% to 35.0 wt% of the polysaccharide sorbitan ester and is the same as that shown in the structural formula (2) above.

The composition of the present invention uses the ditertiary butyl-p-cresol 0.1% by weight to 1.0% by weight as the antioxidant is the same as shown in the formula (3) above. The composition of the present invention using calcium dinonyl-naphthalenesulfonate 5.0% by weight to 15.0% by weight as an antirust additive can be represented by the following structural formula (4).

[Structure 4]

In formula (4), R is C ₉ H ₁₉ and represents X: Ca (SO ₃ ) ₂ .

The present invention is 30.0 wt% to 87.2 wt% of methyl ester of vegetable oil, 1.0 wt% to 15.0 wt% of sorbitan ester, 0.1 wt% to 1.0 wt% of antioxidant, 1.0 wt% to 10.0 wt% of antirust additive, and carbon number 12 The isoparaffinic odorless solvent of 10.0% to 70.0% by weight, and a detergent-type metal covalently-covalent mixture of 0.1% to 1.0% by weight of diol-based compound with a surfactant.

The present invention is the same base oil as shown in the structural formula (1) using 30.0% by weight to 87.2% by weight of methyl ester of vegetable oil as the base oil. The composition of the present invention uses 1.0% by weight to 15.0% by weight of the polysaccharide sorbitan ester and is the same as shown in the structural formula (2) above. The composition of the present invention is 0.1 wt% to 1.0 wt% of ditertiary butyl-p-cresol as the antioxidant and is the same as shown in the above formula (3). The present invention uses calcium dinonyl-naphalenesulfonate 1.0% by weight to 10.0% by weight as an anti-rust additive and is the same as shown in the above formula (4). In the present invention, 10.0% by weight to 70.0% by weight of isoparaffinic odorless solvent having 12 carbon atoms is used. Said odorless solvent is a solvent which can be represented by following General formula (1).

[Formula 1]

C _n H _{2n + 2} (n = 12)

Formula (1) has the formula of C _n H _{2n + 2} (n = 12), the boiling point is used in the range of 40 ℃ ~ 80 ℃. If the boiling point is less than 40 ℃ volatilized too easily is not preferable, and if it is 80 ℃ or more is not preferable because the drying properties after washing is not good.

The composition of the present invention uses 0.1% to 1.0% by weight of 2,4,7,9-tetramethyl-5-decyn-4,7-diol as a diol-based surfactant. Said surfactant is surfactant represented by the following structural formula (5).

[Structure 5]

EXAMPLE

As the base oil used in the present invention, methyl ester of vegetable oil was used alone, and the additive was adjusted in consideration of the workability of metal covalently, and used in consideration of human harmfulness and environmental friendliness. Representative examples are shown in Table-1, Table-2, and Table-3, compared to conventional metal-based covalent sharing using a hydrocarbon-based base oil, and measured in Table 4, Table-5, Table-6.

Table 1

sample One 2 3 4 5 6 7 ISO VG22 Mineral Oil 98.7% - - - - - - Methyl ester of vegetable oil - 100.0% 98.7% 94.7% 84.7% 74.7% 64.7% Sorbitan ester 1.0% - 1.0% 5.0% 15.0% 25.0% 35.0% Antioxidant 0.3% - 0.3% 0.3% 0.3% 0.3% 0.3%

TABLE-2

sample 8 9 10 11 12 13 ISO VG22 Mineral Oil 74.7% - - - - - Methyl ester of vegetable oil - 89.7% 79.7% 69.7% 59.7% 49.7% Sorbitan ester 10.0% 5.0% 10.0% 15.0% 25.0% 35.0% Antioxidant 0.3% 0.3% 0.3% 0.3% 0.3% 0.3% Antirust additive 15.0% 5.0% 10.0% 15.0% 15.0% 15.0%

TABLE-3

sample 14 15 16 17 18 19 20 ISO VG22 Mineral Oil 46.2% - - - - - - Methyl ester of vegetable oil - 87.2% 78.2% 58.2% 42.2% 30.2% 30.0% Sorbitan ester 1.0% 1.0% 2.0% 5.0% 10.0% 15.0% - Antioxidant 0.3% 0.3% 0.3% 0.3% 0.3% 0.3% - Antirust additive 2.0% 1.0% 2.0% 3.0% 5.0% 10.0% - Surfactants 0.5% 0.5% 0.5% 0.5% 0.5% 0.5% - Isoparaffin Solvent 50.0% 10.0% 17.0% 33.0% 42.0% 44.0% 70.0%

Table-4

sample One 2 3 4 5 6 7 Flash point (℃) ^{Note 1)} 174 174 176 178 182 182 184 Kinematic viscosity (40 ℃, cSt) ^{Note 2)} 22.6 4.6 4.7 4.7 4.8 4.8 5.0 Pour point (℃) ^{Note 3)} -15.5 -15.5 -15.0 -15.0 -15.0 -15.0 -17.5 Coefficient of Friction ^{Note 4)} 0.16 0.12 0.12 0.12 0.12 0.12 0.11 Antirust-1 (days) ^{Note 5)} 10 days pass 30 days pass 60 days pass 60 days pass 60 days pass 60 days pass 60 days pass Extreme pressure (Kg / cm ² ) ^{Note 6)} 3.0 4.5 6.0 6.0 6.5 6.5 7.0 Oil stain ^{Note 7)} pass pass pass pass pass pass pass

TABLE-5

sample 8 9 10 11 12 13 Flash point (℃) 176 178 184 186 188 190 Kinematic viscosity (40 ℃, cSt) 23.2 4.7 4.8 5.0 5.2 5.6 Coefficient of friction 0.15 0.12 0.12 0.12 0.11 0.11 Antirust-1 (days) 30 days pass 60 days pass 60 days pass 60 days pass 60 days pass 60 days pass Antirust-2 (hrs.) ^{Note 8)} 10 pass 16 pass 24 pass 32 pass 40 pass 48 pass Extreme pressure (kg / cm ² ) 4.5 6.5 6.5 7.5 8.0 9.0 Oil stain pass pass pass pass pass pass

Table-6

sample 14 15 16 17 18 19 20 Flash point (℃) 50 52 52 48 46 46 42 Kinematic viscosity (40 ℃, cSt) 4.0 2.6 2.4 2.4 2.3 2.1 1.9 Coefficient of friction 0.16 0.13 0.13 0.13 0.13 0.12 0.13 Antirust-1 (days) 45 days pass 60 days pass 60 days pass 60 days pass 60 days pass 60 days pass 60 days pass Rust resistance-2 (hrs.) 12 pass 18 pass 20 pass 24 pass 30 pass 42 pass 16 pass Surface tension (yne / cm) ^{Note 9)} 24.3 22.8 22.7 22.3 21.3 20.6 20.8 Oil stain pass pass pass pass pass pass pass

       Note 1) According to KS M 2010 (Test method for petroleum flash point).

Note 2) Follow KS M 2014 (Kinematic Viscosity Testing Method for Crude Oil and Petroleum Products).

Note 3) Follow KS M 2016 (pouring point and cloud point test method of crude oil and petroleum products).

Note 4) Pendulum planetary friction tester

Note 5) Follow KS M 2090 (Anti-rust Wetting Test Method).

Note 6) In accordance with KS M 2026 (Test method for load resistance of petroleum products).

       Note 7) Conform to MIL C-22235 oil stain test method.

       Note 8) Follow KS M 2091 (Anti-rust salt spray test method).

       Note 9) In accordance with KS M 2525 (Surface Tension Test Method).

According to the present invention, methyl ester of vegetable oil is harmless to human body, and it is an environmentally friendly type with excellent biodegradability and excellent lubricity. It can be said that the methyl ester of vegetable oil is replaced by 90-100% of the base oil of the lubricating oil, and a small amount of other additives are formulated to relate to metal covalent sharing excellent in lubricity, rust resistance, and cleanability.

Claims (5)

64.7% to 98.7% by weight of methyl ester of vegetable oil selected from soybean oil, edible oil, rapeseed oil, sunflower oil, palm oil or corn oil, 1.0% to 35.0% sorbitan ester and 0.1% to 1.0% by weight antioxidant Environmentally friendly metal covalent composition, characterized in that the mixture. According to claim 1, 49.7% to 89.7% by weight of the methyl ester of vegetable oil, 5.0% to 35.0% by weight of sorbitan ester and 5.0% to 15.0% by weight of the antirust additive in 0.1% to 1.0% by weight of antioxidant Environmentally friendly metal covalent composition, characterized in that the mixture further. According to claim 1, 30.0 wt% to 87.2 wt% of methyl ester of vegetable oil, 1.0 wt% to 15.0 wt% of sorbitan ester, and 1.0 wt% to 10.0 wt% of antirust additive in 0.1 wt% to 1.0 wt% of antioxidant , 10.0% by weight to 70.0% by weight of isoparaffinic odorless solvent having 12 carbon atoms and 0.1% by weight to 1.0% by weight of a diol compound. delete delete