Classifications

• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M173/00—Lubricating compositions containing more than 10% water
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M141/00—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential
  • C10M141/08—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential at least one of them being an organic sulfur-, selenium- or tellurium-containing compound
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
  • C10M2201/02—Water
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  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
  • C10M2201/06—Metal compounds
  • C10M2201/062—Oxides; Hydroxides; Carbonates or bicarbonates
• • C—CHEMISTRY; METALLURGY
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  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
  • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
  • C10M2203/102—Aliphatic fractions
  • C10M2203/1025—Aliphatic fractions used as base material
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  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
  • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
  • C10M2203/106—Naphthenic fractions
  • C10M2203/1065—Naphthenic fractions used as base material
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
  • C10M2207/02—Hydroxy compounds
  • C10M2207/021—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms
  • C10M2207/022—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms containing at least two hydroxy groups
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
  • C10M2207/04—Ethers; Acetals; Ortho-esters; Ortho-carbonates
  • C10M2207/046—Hydroxy ethers
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
  • C10M2207/10—Carboxylix acids; Neutral salts thereof
  • C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
  • C10M2207/121—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms
  • C10M2207/123—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms polycarboxylic
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
  • C10M2207/10—Carboxylix acids; Neutral salts thereof
  • C10M2207/18—Tall oil acids
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
  • C10M2207/28—Esters
  • C10M2207/281—Esters of (cyclo)aliphatic monocarboxylic acids
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
  • C10M2207/28—Esters
  • C10M2207/283—Esters of polyhydroxy compounds
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
  • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
  • C10M2209/104—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing two carbon atoms only
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions
  • C10M2215/08—Amides
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions
  • C10M2215/22—Heterocyclic nitrogen compounds
  • C10M2215/225—Heterocyclic nitrogen compounds the rings containing both nitrogen and oxygen
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
  • C10M2219/04—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
  • C10M2219/044—Sulfonic acids, Derivatives thereof, e.g. neutral salts
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
  • C10M2219/10—Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring
  • C10M2219/104—Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring containing sulfur and carbon with nitrogen or oxygen in the ring
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
  • C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
  • C10N2030/12—Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
  • C10N2030/16—Antiseptic; (micro) biocidal or bactericidal
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
  • C10N2030/24—Emulsion properties
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
  • C10N2030/40—Low content or no content compositions
  • C10N2030/41—Chlorine free or low chlorine content compositions
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
  • C10N2030/64—Environmental friendly compositions
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2040/00—Specified use or application for which the lubricating composition is intended
  • C10N2040/20—Metal working
  • C10N2040/22—Metal working with essential removal of material, e.g. cutting, grinding or drilling

Definitions

• the present invention relates to a cutting fluid for metal working processes.
• the present invention relates to a green cutting fluid which is free from chemicals like amines, boron, chlorine and has no added sulphur, which exhibits superior properties in terms of stability, corrosion resistance, effective lubrication and having reduced mist and no sludge formation.
• Cutting fluids have been widely used in metal cutting and grinding processes over the conventional method of using a cutting tool due to their ability to overcome various problems such as frictional heat and tool wear which usually result in poor product quality.
• a wide range of metal working liquids or cutting fluids are known in the art which can be broadly classified into water-soluble and water-insoluble (neat oils) fluids.
• water-soluble (water-based) fluids are soluble (water-in-oil) oil emulsions, semi-synthetic emulsions and synthetic emulsions.
• These metal-working fluids usually contain base oil for providing lubrication and other additives which provide other functionality such as corrosion inhibition, extreme pressure functions, regulate viscosity of the fluid and control microbial growth.
• fluid compositions generally contain boron and/or amine based compounds for corrosion protection and chlorine, sulphur or phosphorus compounds for extreme pressure functions which do not ensure safety for the humans and the environment.
• chlorine based extreme pressure agents are known for its excellent ability to improve cutting performance, it is also a concern for environmental pollution and toxicity issues.
• amine based compounds are known for imparting lubrication and corrosion protection, it has been found to cause dissolution and discoloration of the metals which amount to environmental issues and health hazards.
• the aim of the present invention is to provide a cutting fluid with superior properties in a cost effective way and which is free from such environmentally harmful components.
• the objective of the present invention is to provide a green cutting fluid with superior properties in terms of stability, corrosion resistance, and lubrication, and has low mist generation, is free of sludge formation and which is free from chemicals like amines, boron, chlorine and sulphur.
• one aspect of the present invention is to provide a cutting fluid which comprises base oil and other special additives for imparting enhanced corrosion inhibition and to formulate a clean working product.
• the above special additives may comprise emulsifiers, corrosion inhibitors, extreme pressure additives (EP additives), water, pH adjuster, couplers, biocides, and defoamers.
• the ingredients of the present composition interact synergistically to generate a green cutting fluid with superior properties.
• the instant cutting fluid composition comprises one or more of the following components in the following concentrations
• Another embodiment the present invention relates to a process for the preparation of the green cutting fluid comprising the steps of mixing the acid ingredients and neutralizing with caustic potash solution, adding base oil, sulfonates, ethoxylates and esters and stirring, adding the remaining ingredients such as biocides, and defoamer and stirring, adding demineralized water and stirring.
• Cutting fluid is a type of coolant and lubricant designed specifically for metalworking and machining processes.
• cutting fluids include oils, oil-in-water emulsions, pastes, gels, aerosols (mists), and air or other gases. They may be made from petroleum distillates, animal fats, plant oils, water and air, or other raw ingredients. Depending on context and on which type of cutting fluid is being considered, it may be referred to as cutting fluid, cutting oil, cutting compound, coolant, or lubricant.
• Cutting fluids are used in metal machining for a variety of reasons such as improving tool life, reducing workpiece thermal deformation, improving surface finish and flushing away chips from the cutting zone.
• Green cutting fluid This term is used to refer to the environmental friendly cutting fluids.
• Metalworking fluid is the name given to a range of oils and other liquids that are used to cool and/or lubricate metal workpieces when they are being machined, ground, milled, etc. MWFs reduce the heat and friction between the cutting tool and the workpiece, and help prevent burning and smoking. Applying MWFs also helps improve the quality of the workpiece by continuously removing the fines, chips, and swarfs from the tool being used and the surface of the workpiece. (Swarfs are the small pieces of metal removed from a workpiece by a cutting tool.)
• Mist Metalworking fluids can form a mist of small droplets that are suspended in the air and can be inhaled and ingested. When these fluids form into a mist during the machining process, they can be very irritating to the eyes, nose, and throat. Therefore it is highly desirable to reduce mist.
• Sludge results from breakdown of emulsions due to bacterial soap formation with metallic content (for example calcium, magnesium from water or metal chips from the machining process). Sludge leads to bad odour, depletion of useful additives and/or oil and dirty working conditions. Therefore it is highly desirable to reduce and if possible eliminate sludge.
• Base oil is the name given to lubrication grade oils initially produced from refining crude oil (mineral base oil) or through chemical synthesis (synthetic base oil). Base oil is typically defined as oil with a boiling point range between 290 and 570°C (550 and I 050 °F), consisting of hydrocarbons with 18 to 40 carbon atoms. This oil can be either paraffinic or naphthenic in nature depending on the chemical structure of the molecules.
• Corrosion inhibitor is a chemical compound that, when added to a liquid or gas, decreases the corrosion rate of a material, typically a metal or an alloy.
• Emulsifier is a substance that stabilizes an emulsion by increasing its kinetic stability.
• EP additive Extreme pressure additives
• EP additives are additives for lubricants with a role to decrease wear of the parts of the gears exposed to very high pressures. They are also added to cutting fluids for machining of metals.
• Couplers assist in stabilizing water dilutable metal working fluids in the concentrate to prevent separation of components.
• Biocides A biocide is a chemical substance or microorganism which can deter, render harmless, or exert a controlling effect on any harmful organism by chemical or biological means.
• Reichert wear tester The testing of materials for load bearing capacity is tested by means of Reichert wear tester. Extreme pressure properties of lubricants in terms of film formation, wearing out and load carrying capacity are evaluated by Reichert wear tester.
• the Four Ball Wear Test determines the wear protection properties of a lubricant. Three metal balls are clamped together and covered with the test lubricant, while a rotating fourth ball is pressed against them in sliding contact. This contact typically produces a wear scar, which is measured and recorded. The smaller the average wear scar, the better the wear protection provided by the lubricant.
• IP 125 Test for the determination of cast iron corrosion characteristics of petroleum products.
• IP 287 Test for the determination of rust preventive characteristics of water mix metal working fluids-chip / filter paper method.
• ASTM D130 Standard test method for corrosiveness to copper from petroleum products by copper strip test. In ASTM D130, ratings are specified from 1A to 4C; 1A being no corrosion and 4C very high corrosion.
• ASTM D 4172 Standard test method for wear preventive characteristics of lubricating fluid (four ball method)
• the green cutting fluid of the invention comprises base oil, emulsifier, corrosion inhibitor, EP additive, water, coupler, biocides, pH adjuster, defoamer etc.
• Base oil imparts better lubricity to the cutting fluid.
• the base oil used in the invention may be selected from paraffinic or naphthenic oil. In a preferred embodiment of the invention, the base oil used is naphthenic base oil.
• the green cutting fluid composition comprises anionic or non-ionic surfactants, such as sulphates, sulphonates or ethoxylates, as emulsifiers.
• the emulsifier used is selected from sulphates, sulfonates and ethoxylates of vegetable origin.
• the preferred sulfonates and ethoxylates used are sodium dodecyl sulfonate or sulphate, oleyl cetyl alcohol ethoxylates and sorbitol mono oleate.
• Corrosion inhibitors used in the invention are preferably selected from long chain fatty acid or succinic acid derivatives.
• the preferred corrosion inhibitor is selected from succinic anhydride derivatives for. e.g., alkenyl succinic anhydride and tall oil fatty acid.
• the fluid composition of the present invention comprises naturally derived esters such as fatty acid esters and glycol or glycerol esters as EP additives for extreme pressure additive property over the conventionally used chlorines.
• This feature of the present invention imparts biodegradability to the product.
• the preferred EP additive used in the invention is selected from esters of ricinoleic acid.
• the pH adjuster controls the pH of the composition to about pH 8, which provides skin protection to the user.
• pH adjuster that could be used in this invention is potassium hydroxide.
• Couplers are used to keep the concentrate stable. Couplers used in the present composition are selected from glycols and ethers. Some examples of specific couplers used in the invention are butyl diglycol and hexylene glycol
• Biocides are used to control fungus and mold growth.
• Biocides used in the invention are selected from isothiazole derivatives and methyl oxazolidine.
• Isononane acid amide could be used as a defoamer in the invention.
• the cutting fluid of the invention comprises base oil in an amount of 30 to 50% by weight, emulsifier in an amount of 5 to 20% by weight of, extreme pressure additive (EP additive) in an amount of 5 to 15% by weight, corrosion inhibitor in an amount of 10 to 15% by weight, water in an amount of 5 to 15% by weight, pH adjuster in an amount of 5 to 10% by weight, coupler in an amount of 5 to 10% by weight, biocide in an amount of ⁇ 1% by weight and defoamer in an amount of ⁇ 1% by weight.
• EP additive extreme pressure additive
• corrosion inhibitor in an amount of 10 to 15% by weight
• water in an amount of 5 to 15% by weight
• pH adjuster in an amount of 5 to 10% by weight
• coupler in an amount of 5 to 10% by weight
• biocide in an amount of ⁇ 1% by weight
• defoamer in an amount of ⁇ 1% by weight.
• the green cutting fluid of the invention comprises naphthenic base oil in an amount of 30-50% by weight, sodium dodecyl sulfonate (or sulphate) in an amount of 4-15% by weight, oleyl alcohol ethoxylate in an amount of 4-15% by weight, sorbitol oleic acid ester in an amount of 3-8% by weight, ricinoleic acid ester in an amount of 5-15% by weight, tall oil fatty acid in an amount of 2-6% by weight, alkenyl succinic anhydride in an amount of 5-12% by weight, demineralized water in an amount of 5-10% by weight, caustic potash solution in an amount of 3-8% by weight, hexylene glycol in an amount of 1-5% by weight, butyl diglycol in an amount of 1-5% by weight, octyl isothiazol in an amount of ⁇ 2% by weight, methyloxazolidine in an amount of ⁇ 1% by weight and isononane
• the green cutting fluid of the invention comprises naphthenic base oil in an amount of 45 % by weight, sodium dodecyl sulfonate (or dosium dodecyl sulphate) in an amount of 5 % by weight, oleyl cetyl alcohol ethoxylates in an amount of 7 % by weight, sorbitol mono oleate in an amount of 4% by weight, ricinoleic acid ester in an amount of 7% by weight, tall oil fatty acid in an amount of 4% by weight, alkenyl succinic anhydride in an amount of 8% by weight, demineralized water in an amount of 8.2% by weight, caustic potash solution in an amount of 6% by weight, hexylene glycol in an amount of 2% by weight, butyl diglycol in an amount of 3% by weight, octyl isothiazol in an amount of 0.4% by weight, methyloxazolidine in an amount of 0.2% by weight
• composition of the green cutting fluid according to a preferred embodiment is shown in table 1.
• Table1 Components of the green cutting fluid of the invention % by weight of the composition naphthenic base oil 45 sodium dodecyl sulfonate 05 oleyl cetyl alcohol ethoxylate 07 tall oil fatty acid 04 sorbitol mono oleate 04 alkenyl succinic anhydride 08 ricinoleic acid ester 07 demineralized water 8.2 caustic potash solution 06 hexylene glycol 02 butyl diglycol 03 octyl isothiazol 0.4 methyloxazolidine 0.2 isononane acid amide 0.2
• composition of the present invention was subjected to various tests to evaluate the performance of the said composition in terms of corrosiveness to iron, copper and aluminum, rust prevention characteristics, anti-wear properties, stability of the cutting fluid in the form of aqueous solution and load bearing capacity as per the known methods.
• the green cutting fluid of the present invention exhibited excellent properties with regard to corrosion prevention, anti-wear, rust prevention and stability. Further the invented composition has very low mist formation and no sludge in the application thereby translating in to clean environment.
• Example 3 Comparative evaluation showing the superior performance of the green cutting fluid of the invention
• the green cutting fluid of the present invention is a synergistic composition showing excellent performance which is superior over the state of the art technologies.

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• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Organic Chemistry (AREA)
• Lubricants (AREA)

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Cited By (14)

Citations (4)

• 2012
  • 2012-05-03 EP EP12166702A patent/EP2520639A1/de not_active Withdrawn

Patent Citations (4)

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