Title of Invention

"AN ALTERNATE COMPOSITION OF GEAR OIL"

Abstract

This invention provides a gear oil composition based on heavy alkyl benzene having carbon atom in side chain ranging from C22 to C25. In addition to alkyl benzenes, the composition also contains antioxidant, antifoaming agent, pour point depressant, corrosion inhibitor and detergent-dispersant additive, extreme pressure additive and lubricity additives. The product of this invention has utility as gear oil of VG 46 grade for industrial and automotive gears of grade GL 4 & 5. It produces lower amount of pollution, is less toxic and miscible in mineral, vegetable and synthetic oil in all proportions.

Full Text

FIELD OF THE INVENTION The present invention relates to a gear oil composition. This invention particularly relates to a composition of gear oil that mainly contains alkyl benzenes. In addition to alkyl benzenes, the composition also contains antioxidant, extreme pressure additive, antifoaming agent, pour point depressant, corrosion inhibitor, detergent-dispersant additive and lubricity additives, and has utility as a gear lubricant of VG46 grade for industrial and automotive application. BACKGROUND OF THE INVENTION Gears transmitted rotary motion. Modern metallurgy has greatly increased the useful life of industrial and automotive gears. Operating capacity of a gear-set is limited by one of four types of failure, Wear, Scoring, Pitting, and Tooth breakage due to operating speed, load, lubricant characteristics and operating temperature. The severity of the conditions varies in its diverse application as marine turbines, rolling mill, automobile transmissions, and aircraft propeller gears, that an oil can withstand and acts only over a narrow range of contact that newly lubricated and relatively cool surfaces are constantly coming into action. Under the conditions of high pressure and considerable momentary temperature rise, a film must prevent damage to the tooth surface by abrasion or scuffing. In industrial applications, stability is of the greatest importance. In the case of oils used in a. common system for lubricating steam turbines and reduction gears, contact with water further increases the necessity for stability and demulsibility. The range of operating temperatures may impose limits on the allowable viscosity, particularly at low temperatures. From the known knowledge and experience, the following broad generalization on the influence of the properties of oil on its behavior of a gear lubricant can been drawn. (a) for straight mineral oils, tooth friction and wear diminish with increase of viscosity. (b) for the same viscosity, the coefficient of friction is lower with paraffin-base. (c) refinement by an unsuitable process may increase both tooth friction and wear. (d) oil of low friction usually give the great protection against wear. As it is not possible to prevent lubricant losses to the environment. Ecological balance is of great concern or survival of living beings. Industry experts estimate that 70% to 80% of hydraulic fluids leave systems through leaks, spills, line breakage and fitting failure. No doubt petroleum based lubricants increase the capacity and speed of industry and other machines. It however leads to increase in temperature of environment and thus contributes to global warming. It damages living organisms including plants, animals and marine life for many years. The petroleum based lubricating oils are hydrocarbons consisting of naphthenes, paraffins, aromatics, polynuclear aromatics and unsaturates. Petroleum based lube oils, generally suffer from disadvantages such as high toxicity to the environment, poor biodegradability and inconsistent characteristics with change in crude oil composition. The other types of lubricants known as synthetic lubricants are designed for use in extreme conditions of temperature, pressure, radiation or chemical and have excellent lubricity and thermal stability. The synthetic lubricants are relatively costly, also toxic to environment. Reference may be made to US Patents,872,693 dated March 29, 2005 by Cain, Assignee: The Lubrizol Corporation (Wickliffe, OH) - Mineral gear oils and transmission fluids. This invention relates to mineral oil based gear oils and transmission fluids which comprise a major amount of a mineral oil having an iodine number of less than 9 and where at least 55% of the saturates are aliphatic, and gear oil or transmission fluid additives. In one embodiment, the invention relates to a gear oil or transmission fluid composition comprising a major amount of lubricant basestock and at least one functional additive wherein a major amount of the lubricant basestock comprises a mineral oil having an iodine number of less than 9 and comprising at least 45% by weight of aliphatic saturates. These gear oils and transmission fluids have good viscosity and oxidation properties (Here, mineral oil are used). Reference may be made to US Patent 4,082,680 Dated April 4, 1978 by Mitacek; Bill, assignee Phillips Petroleum Company (Bartlesville, OK) - Shear-stable, high viscosity index gear oil. formulations are formed by the inclusion into such formulations of a small amount of a hydrogenated butadiene-styrene copolymer having a butadiene content of 30 to 44 weight percent and a weight average molecular weight in the range of about 12,000 to about 20,000. (Here, blend of mineral oil and polybutadine are used). Reference may be made to US Patent 4,164,475 dated August 14, 19 by Schieman; Richard D, assignee: The Standard Oil Company (Cleveland, OH) - Multi-grade 80W-140 gear oil. A multi-grade 80W-140 gear oil is described which is composed of certain mineral-oil stocks, a wear additive, a V.I. improver, a dispersant polymer and optionally a seal-swell agent 1. In a multi-grade gear oil composition comprising a major proportion of mineral lubricating oil, 5-6 volume percent sulfur-and phosphorous-containing wear additive, 16.6-18.6 volume percent V.I. improver, and 0-2.7 volume percent seal-swell agent, the improvement comprising using as the oil a petroleum-oil stock composed of 20-23 volume percent of a 5.0 centistokes at 210.degree. F. oil, 24-25 volume percent 14.0 centistokes at 210.degree. F. oil, and 26-30 volume percent 25.0 centistokes at 210.degree. F. oil, and from 0.1 to 1.5 volume percent of a dispersant polymer which is an alkyl methacrylate copolymer which has been grafted with a dialkyl amino methacrylate monomer. (Here, mineral oil is used) Reference may be made to US Patent 5,358,650 dated October 25, 1994 Srinivasan; Sanjay and Hartley; Rolfe J. Assignee: Ethyl Corporation (Richmond, VA) Gear oil compositions. A "cold-clash" gear problem associated with vehicular manual transmissions exposed to the cold is overcome by use of a special all-synthetic gear oil composition. The composition is composed of base oil and specified additive components. The base oil is a blend of di-(2-ethylhexyl) sebacate and three hydrogenated poly-.alpha.-olefin oligomers having kinematic viscosity at 100.degree. C. of about 40, about 8 cst and about 2 cst in specified proportions. The additive components comprise an organic sulfur-containing antiwear and/or extreme pressure agent, an organic phosphorus-containing antiwear and/or extreme pressure agent, a copper corrosion inhibitor, a rust inhibitor, a foam inhibitor, and an ashless dispersant. The gear oil has a boron content of about 0.0025 to about 0.07 wt %. (Here, blend of sebacate and PAO synthetic oil are used) Reference may be made to U.S. Patent, 5,571,445 dated November 5, 1996 by Srinivasan , et al. Assignee: Ethyl Corporation (Richmond, VA) - Gear oil compositions. A "cold-clash" gear problem associated with vehicular manual transmissions exposed to the cold is overcome by use of a special all-synthetic gear oil composition. The composition is composed of base oil and specified additive components. The base oil is a blend of dialkyl ester of an aliphatic dicarboxylic acid having a maximum pour point of about -55.degree. C. and a maximum kinematic viscosity at 100.degree. C. of about 4 cst, and three hydrogenated poly-.alpha.-olefin oligomers having kinematic viscosities at 100.degree. C. of about 40, about 4-8 cst and about 2 cst in specified proportions. The additive components comprise an organic sulfur-containing antiwear and/or extreme pressure agent, an organic phosphorus-containing antiwear and/or extreme pressure agent, a copper corrosion inhibitor, a rust inhibitor, a foam inhibitor, and an ashless dispersant. The gear oil has a boron content of about 0.0025 to about 0.07 wt % (here blend of dialkyl ester and PAO base stocks were used) Reference may be made to US Patent 5,364,994 dated November 15, 1994 by Scharf; Curtis R, Assignee: The Lubrizol Corporation (Wickliffe, OH) - A gear oil composition Lubricating compositions containing .alpha.-olefin polymers. The invention deals with viscosity improvers which are .alpha.-olefin polymers and are particularly useful in lubricating compositions comprising (A) a liquid .alpha.-olefin polymer having a number average molecular weight from about 2,000 to about 100,000 and having derived from . alpha.-olefins having from about 4 to about 30 carbon atoms, provided further that (A) has a bimodal molecular weight distribution having (i) a peak molecular weight maximum at 2,000 to 5,000 for a lower molecular weight component and (ii) a peak molecular weight maximum at 50,000 to 75,000 for a higher molecular weight component; (B) an oil of lubricating viscosity and (C) at least one member selected from the group consisting of a friction modifier, a sulfurized olefin, an ash-producing detergent and, an ashless dispersant. (Here, synthetic oil are used) Reference may be made to US Patent 5,942,470 dated August 24, 1999 by Norman, et al. Assignee: Ethyl Petroleum Additives, Inc. (Richmond, VA) - Lubricant compositions. Gear oils and gear oil additive concentrates of enhanced positraction performance are described. They comprise: (i) at least one oil-soluble sulfur-containing extreme pressure or antiwear agent; (ii) at least one oil-soluble amine salt of a partial ester of an acid of phosphorus; and (iii) at least one oil-soluble succinimide where R.sub.1 is an alkyl or alkenyl group having an average of 8 to 50 carbon atoms, and each of R.sub.2, R.sub.3 and R.sub.4 is a hydrogen atom or an alkyl or alkenyl group having an average of up to about 4 carbon atoms. These compositions preferably contain one, more preferably two, and most preferably all three of the following additional components: (iv) at least one amine salt of a carboxylic acid; (v) at least one nitrogen-containing ashless dispersant; and (vi) at least one trihydrocarbyl ester of a pentavalent acid of phosphorus (Here, synthetic oil are used) Reference may be made to US Patent6,649,574 dated November 18, 2003 by Cardis , et al. Assignee: ExxonMobil Research and Engineering Company (Annandale, NJ) - Biodegradable non-toxic gear oil A biodegradable lubricating oil composition especially useful as a gear oil employs a synthetic alcohol ester basestock formed from mono- and dipentaerythritol with certain mono- and dicarboxylic acids or dicarboxylic acid anhydrides and an effective amount of a polyoxyalkylene alcohol demulsifying agent, a combination of alkylated organic acid and ashless succinimide rust inhibitors and an ashless dithiocarbamate antiwear and extreme pressure agent (Here, synthetic oil are used) A patent filled by the inventors of the present invention disclosed the use of Heavy Alkyl Benzene alkaline earth metal sulfonates used as detergent-dispersant-anti rust additive in various types of lubricants (Patent application IPA number 1306/DEL/1998 & 1307/DEL/1998 by A.K.Singh etal assigned to CSIR). The alkyl benzenes are mono, di and poly substituted alkyl aromatics having one benzene or toluene aromatic ring and straight or branched paraffinic chains, preferably mono and di alkyl benzene. Alkyl benzenes are produced as by-products during the preparation of, (1) linear alkyl benzene (LAB) in detergent industry, (2) heavy aromatic produced in catalytic reformer, and (3) naphtha or gas steam cracker liquid product. Alkyl benzene consists of substituted benzenes and no poly-aromatics/ condensed ring or olefinic compounds are present in the alkyl benzenes. It can be used as an alternate to mineral base stock of lubricants. It will reduce the hazard potential of the lubricants. It will provide required properties such as good gear oil properties, lubricity, load carrying, stability, anti-corrosion properties and more eco-friendliness. In the prior art for producing gear oils, generally, mineral oils or mineral oil with synthetic fluids or complex ester of fatty acids were use d. The focus has been on the use of such oil base to enhance the performance. Due to above drawbacks, there is a need for developing new gear oil composition from alternate source, which is free from harmful polynuclear aromatic hydrocarbons generally found in mineral oil and produce less pollution. These objectives must be met, while simultaneously satisfying stringent performance standards, e.g., good lubricity, load carrying, stability and anti-corrosion. OBJECTIVES OF THE INVENTION The main object of the present invention is to provide a composition of gear oil from alternate source based on alkyl benzenes obtained from various petrochemical or refinery waste streams such as heavy alkylates from LAB plants, higher aromatic from catalytic reformers or steam cracking plants. Yet another object of the present invention is not to use the polynuclear aromatic hydrocarbons, a component of mineral oil and reducing pollution potential of the gear oil formulation. Still another object of the present invention is to provide excellent miscibility of formulated gear oil with mineral, vegetable and synthetic oil in all proportions. SUMMARY OF THE INVENTION Accordingly the present invention provides a gear oil composition comprising: i. tailored heavy alkyl benzene having carbon atom in side chain mainly C22 to C25 in the range of 96.0 -99.224 wt%, ii. anti-oxidant in the range of 0.006-0.05% by weight iii. extreme pressure additive in the range of 0.5-1.0 % by weight, iv. detergent -dispersant in the range of 0.05-0.15 % by weight, v. anti-foaming agent in the range of 0.01 to 1.0% by weight, vi. pour point depressant in the range of 0.01 to 1.0% by weight, vii. corrosion inhibitor in the range of 0.10-0.3% by weight, and viii. lubricity additive in the range of 0.1-0.5% by weight. In an embodiment of the present invention the heavy alkyl benzene used is mono, di and poly substituted alkyl aromatics. In another embodiment of the present invention the heavy alkyl benzene used is selected from those produced during the production of linear alkyl benzene (LAB) in detergent industry, heavy alkyl aromatics produced in catalytic reformer, naphtha or gas steam cracker liquid product and a mixture thereof. In another embodiment of the present invention the heavy alkyl benzene used has one benzene aromatic ring and straight or branched paraffinic chains having carbon atoms ranging from 22 to 25. In yet another embodiment of the present invention the heavy alkyl benzene fractions having carbon atom in side chain ranging from C22 to C25 used is obtained from heavy alkylate fractions of linear alkyl benzene (LAB) or crackers, at a temperature in the range of 350-600°C, under vacuum distillation. In still another embodiment of the present invention the heavy alkyl benzene fraction having carbon atom in side chain C22 to C25 is free from oxidized product. In still another embodiment of the present invention the oxidized product free heavy alkyl benzene fraction having carbon atom in side chain C22 to C25 used has following characteristics: Kinetic viscosity at 40°C, cst in the range of Poly-aromatics or olefinic compounds Viscosity index in the range of Oxidation Stability, IP 48/97 Pour point in the range of RoBOT test 95°C in the range of Flash point in the range of Acid number, mg KOH In yet another embodiment of the present invention the anti-oxidant used is selected from the group consisting of hindered phenol, alkyl amine, amino phenol and tetrazole and a mixture thereof. In yet another embodiment of the present invention the anti-oxidant used is selected from the group consisting of2,4,6-tri-tert-butylphenol, 2,6-di-tert-butyl-4-n-butylphenol, 2,6-di-t-butyl-4-methylphenol, dinaphthylamines, phenylnaphthyl amines, p,p-dioctyl diphenylamine, 4-methyl-2,6-di-(t-butyl) phenol, Methyl hydroxy hydro cinnamide, alkylated 5-amino tetrazole, di-ter.Butyl p-amino phenol, zinc dialkyi dithio phosphate, and a mixture thereof In yet another embodiment of the present invention the extreme pressure additive used is selected from the group consisting of sulfurized neem oil, sulfurized mahua oil, dibenzyl disulphide, suphurized pentadecyl phenol, thiophosphoro luryl oleate, molybdenum salt of thiophosphoro luryl oleate, zinc dialkyi dithio phosphate, dibenzyl diselenate, selenophosphoro luryl oleate, selenophosphoro pentadecyl phenol, molybdenum thiophosphoro pentadecyl phenol and a mixture thereof. In yet another embodiment of the present invention the detergent -dispersant used is selected from the group consisting of calcium alkyl benzene sulfonate, sodium alkyl benzene sulfonate, propylene teramer succinimide of pentaethylene hexamine, octyl phosphonates and a mixture thereof. A composition as claimed in claim 1 wherein the anti-foaming agent used is selected from the group consisting of silicone oil, polyvinyl alcohol, polyethers and a mixture thereof. In yet another embodiment of the present invention the pour point depressant used is selected from the group consisting of diethylhexyl adipate, polymethacrylate, polyvinylacrylate and a mixture thereof. In yet another embodiment of the present invention the corrosion inhibitor used is selected from the group consisting of octyl 1H benzotriazole, ditertiary butylated 1 H-Benzotriazole, propyl gallate, polyoxyalkylene polyols, octadecyl amines, nonyl phenol ethoxylates, calcium phenolates of hydrogenated pentadecyl phenol, magnesium alkyl benzene sulfonates and a mixture thereof. In yet another embodiment of the present invention the lubricity additive used is selected from octyl phosphates, methyl hydroxy hydro cinnamide, ethyl hexyl ester of vegetable oil fatty acid, and a mixture thereof. In yet another embodiment of the present invention that it is suitable for use as V46 gear oil of GL 4 & 5 grade. In still another embodiment the gear oil composition obtained has the following characteristics: i) Kinetic viscosity at 40°C is in the range of 40-60 cst, ii) Viscosity index 95-160, iii) Oxidation stability at 121°C,312hours,10lit air/hour) - 3 to 4% increase in kinematic viscosity at 100°C iv) Rotatory bomb oxidation test (ROBOT) at 95°C is 180-250 min., v) Flash point 195-225°C, vi) Pour point (-)21 to (-)39°C, vii) Ash sulfated % viii)Lubricity-Friction.Coeff. (HFRR) - 0.101 to 116, mm ix) Wear Scar Dia (WSD) (HFRR) - 0.533 to 0.566, mm x) Total acid number, mg KOH/gm - nil xi) Copper Strip corrosion test, 100°C, 3 hrs is 1A, xii) Foam test @ 10 min, ml, 24-93.5-24/93.5°C is 2-1-2 to 4-2-4, xiii) Biodegradability 40-50%. xiv) Air release at 50°C,minuts is 6 to 9, xv) Demulsibility (water in oil) 5 hours test, 0.2 to 0.4 % xvi) Rust test, 24 hours in sea water, no rust DETAILED DESCRIPTION OF THE INVENTION The composition is significantly non-toxic having no polynuclear aromatic and able to replace the traditional mineral lube oils. The lubricant compositions of the present invention would be particularly suited for VG 46 gear oil. The main advantages are, it reduces use of petroleum, offer better use of petrochemical waste product, cheaper than synthetic oil, product is more biodegradable and eco-friendly than petroleum lubes. The present invention provides a gear oil which is superior in performance, particularly in viscosity index,, toxicity, and pour point as compared below, Comparison of properties of various gear oil TAILORING OF ALKYLATE: commercial alkylates, a waste alkyl benzene from cracker unit, was fractionated by vacuum distillation. The heavier cut having 50 weight percent of total alkylate was taken for base-stock preparation. The typical properties of the alkylate are EXAMPLE 3 (Table Remove) PREPARATION OF BASE STOCK (A) Tailored heavy alkylate of example-1 (100% w/w) was passed through silica gel column to remove oxidized product or treated with absorbent clay such as fuller's earth by mixing and thoroughly stirred for 50 minutes at 80°C and filtering it through G-4 sintered glass funnel. The typical physico-chemical characteristics of the heavy alky late are: Kinetic viscosity at 40°C, cst Viscosity index Oxidation Stability, IP 48/97 Pour point RoBOT test 95°C Flash point Acid number, mg KOH Poly-aromatics or olefinic compounds EXAMPLE 4 PREPATION OF BASE STOCK (B) Tailored alkylate from cracker unit of example-2 (100% w/w) was passed through silica gel column to remove oxidized product or treated with absorbent clay such as fuller's earth by mixing and thoroughly stirred for 50 minutes at 80°C and filtering it through G-4 sintered glass funnel. The typical physico-chemical characteristics of the base oil is: Poly-aromatics or olefinic compoundsEXAMPLE 6 PREPARATION OF LUBE OIL FROM BASE STOCK The base stock (A) in 99.777 % (w/w) was blended with additive Methyl Hydroxy Hydro Cinnamate in 0 018 % (w/w) & octyl 5amino tetrazole in 0.02 % (w/w) as anti-oxidants, dibezyl disulphide in 0.02 % (w/w) & sulfurized neem oil in 0.02 % (w/w) as Extreme Pressure additives, pentaethylene hexamine dodecyl succinimide as detergent -dispersant in 0.02 % (w/w), Silicone polymer oil as antifoaming agent cum pour point depressant in 0.05 % (w/w) and calcium HAB sulfonate as corrosion inhibitors having base number 500 in 0.025 % (w/w) concentration and the ethylhexyl ester of fatty acid of rice bran oil as a lubricity additive in 0.05 % (w/w). The doping was done at 60°C with stirring for 2 hours. EXAMPLE 7 PREPARATION OF LUBE OIL FROM BASE STOCK The base stock (B) in 99.785 % (w/w) was blended with additive , zinc dialkyl dithio phosphate in 0.025 % (w/w) & p-p-dioctyl diphenyl amine as an anti-oxidant in 0.03 % (w/w), dibezyl diselenide in 0.02 % (w/w) & sulfurized ricebran oil in 0.02 % (w/w) as Extreme pressure additives, octyl phosphonate as detergent -dispersant in 0.02 % (w/w), poly vinyl acrylate as antifoaming agent cum pour point depressant and alkyl benzotriazole as corrosion inhibitors in 0.05 % (w/w) concentration and the ethylhexyl ester of hydrogenated fatty acid of neem oil as a lubricity additive in 0.05 % (w/w). The doping was done at 60°C with stirring for 2 hours. EXAMPLE 8 PREPARATION OF LUBE OIL FROM BASE STOCK The base stock (C) in 99,765 % (w/w) was blended with additive di-t-butyl 4-methyl phenol as an anti-oxidant in 0.02 % (w/w), Molybdenum thiophosphoro pentadecyl phenol in 0.02 % (w/w) & sulfurized hydrogenated karanja oil in 0.02 % (w/w) as extreme pressure additives, the ethylhexyl ester of fatty acid of karanja oil in 0.05 % & Methyl Hydroxy Hydro Cinnamate in 0.025 % (w/w) as lubricity additives, pentaethylene hexamine propylene tetramer succinimide as detergent -dispersant in 0.05 % (w/w), polymethacrylate as antifoaming agent cum pour point depressant and octyl phosphonate as corrosion inhibitors in 0.05 % (w/w) concentration. The doping was done at 60°C with stirring for 2 hours. EXAMPLE 9 PREPARATION OF LUBE OIL FROM BASE STOCK The base stock (C) in 99.765 % (w/w) was blended with additive n-naphthyl 2-phenylamine as an anti-oxidant in 0.02 % (w/w), molybdenum thiophosphoro luryl oleate in 0.02 % (w/w) & dibenzyl diselenide in 0.02 % (w/w) as extreme pressure additives, the ethylhexyl ester of fatty acid of mahua oil in 0.05 % (w/w) & zinc dialkyl dithiophosphate in 0.025 % (w/w) as lubricity additives, pentaethylene hexamine propylene tetramer succinimide as detergent -dispersant in 0.02 % (w/w), Silicone polymer oil as antifoaming agent cum pour point depressant and alkyl 1H benzotriazole as corrosion inhibitors in 0.05 % (w/w) concentration and of base oil. The doping was done at 60°C with stirring for 2 hours. EXAMPLE 10 CHARACTERIZATION AND EVALUATION OF LUBE OIL: The formulations were analyzed and evaluated as per BIS methods such as BIS-14234, P25/56 -K.Viscosity & Viscosity index, BIS-P21/69- Flash point, BIS-P16 - Rel.Density, BIS-PI 5- Copper corrosion, BIS-P10- Pour point, BIS-P4- Ash sulphated, BIS-P1- TAN, BIS-P40- Water, IP 280, 306, 307-Oxidation Test, The typical values are K.Vis at 40°C 55 cst, K.Vis at 100°C 9.7 cst Viscosity index 144, Oxidation stability Pass (IP 48/97 - Oxidation characteristics of lube oil- Max - 1 % increase in Viscosity and carbon residue for a good stable oil. RoBOT at 95°C- 300 min.), Flash point 158°C, Pour point (-)24°C and Ash sulfated % 300, Lubricity- Friction Coeff, mm 0.101, WSD, mm 0.533, Copper Strip corrosion test 1A, Foam test ASTM D892 Pass, Biodegradability 50 ± 5 % , Panel cocking test Pass, ADVANTAGES OF THE INVENTION The main advantages of the present invention are: a) The lubricant would be particularly suited for industrial and automotive gear oil of GL4 & 5 grade. b) It reduces use of petroleum, offer better use of petrochemical waste product, c) Product is more biodegradable around 40 to 60 % and ecofriendly than petroleum lubes. d) Provides better or equivalent performance as mineral oil based gear oils. 0 We Claim: 1. A gear oil composition comprising: i) tailored heavy alkyl benzene having carbon atom in side chain C22 to C25 in the range of 96.0 -99.224 wt%, ii) anti-oxidant selected from the group consisting of hindered phenol, alkyl amine, amino phenol and tetrazole, in the range of 0.006-0.05% by weight, iii) extreme pressure additive selected from the group consisting of sulfurized and selenized organic compounds in the range of 0.5-1.0 % by weight, iv) detergent -dispersant selected from the group consisting of sulfonate, succinimide and phosphonates in the range of 0.05-0.15 % by weight, v) anti-foaming agent selected from the group consisting of silicone and polymer compound in the range of 0.01 to 1 .O% by weight, vi) pour point depressant selected from the group consisting of adipate and acrylate in the range of 0.01 to 1 .O% by weight, vii) corrosion inhibitor selected from the group consisting of azole, Gallate, polyols, amines, phenols and sulfonates in the range of 0.10-0.3% by weight, and viii) lubricity additive selected from the group consisting of phosphates, amides and esters in the range of 0.1-0.5% by weight. 2. A composition of gear oil as claimed in claim 1, wherein the heavy alkyl benzene is mono, di and poly substituted alkyl aromatics. 3. A composition of gear oil as claimed in claims 1&2, wherein the heavy alkyl benzene is selected from those produced during the production of linear alkyl benzene (LAB) in detergent industry, heavy alkyl aromatics produced in catalytic reformer, naphtha or gas steam cracker liquid product and a mixture thereof. 4. A Composition of gear oil as claimed in claims 1&2, wherein the heavy alkyl benzene has one benzene aromatic ring and straight or branched paraffinic chains having carbon atoms ranging from 22 to 25. 5. A composition as claimed in claim 1, wherein the heavy alkyl benzene fractions having carbon atom in side chain ranging from C22 to C25 is obtained from heavy alkylate fractions of linear alkyl benzene (LAB) or crackers, at a temperature in the range of 350-600°C, under vacuum distillation. 6.A composition as claimed in claims Ito 5, wherein the heavy alkyl benzene fraction having carbon atom in side chain C22 to C25 is free from oxidized product. 7. A composition as claimed in claims 1-6, wherein the oxidized product free heavy alkyl benzene fraction having carbon atom in side chain C22 to C25 has following characteristics: 8. A composition as claimed in claim I , wherein the anti-oxidant is selected from the group consisting of 2,4,6-tri-tert-butylphenol, 2,6-di-tert-butyl-4-nbutylphenol, 2,6-di-t-butyl-4-methylphenol, dinaphthylamines, phenylnaphthyl amines, p,p-dioctyl diphenylamine, 4-methyl-2,6-di-(t-butyl) phenol, Methyl hydroxy hydro cinnamide, alkylated 5-amino tetrazole, di-ter.Butyl p-amino phenol, zinc dialkyl dithio phosphate, and a mixture thereof 9. A composition as claimed in claim 1 wherein the extreme pressure additive is selected from the group consisting of sulfurized neem oil, sulfurized mahua oil, dibenzyl disulphide, suphurized pentadecyl phenol, thiophosphoro luryl oleate, molybdenum salt of thiophosphoro luryl oleate, zinc dialkyl dithio phosphate, dibenzyl diselenate, selenophosphoro luryl oleate, Kinetic viscosity at 40°C, cst in the range of Viscosity index in the range of Oxidation Stability, IP 48/97 Pour point in the range of ROBOT test 95°C in the range of Flash point in the range of Acid number, mg KOH Poly-aromatics or olefinic compounds 5-55 1 20-1 43 Pass - increase in viscosity 0.7-0.9% (-)2 1-24°C 21 0-250 minutes 155-1 58°C 0.005 Negligible selenophosphoro pentadecyl phenol, molybdenum thiophosphoro pentadecyl phenol and a mixture thereof. 10. A composition as claimed in claim I, wherein the detergent -dispersant is selected from the group consisting of calcium alkyl benzene sulfonate, sodium alkyl benzene sulfonate, propylene teramer succinimide of pentaethylene hexamine, octyl phosphonates and a mixture thereof. 11. A composition as claimed in claim 1, wherein the anti-foaming agent is selected from the group consisting of silicone oil, polyvinyl alcohol, polyethers and a mixture thereof. 12. A composition as claimed in claim 1, wherein the pour point depressant used is selected from the group consisting of diethylhexyl adipate, polymethacrylate, polyvinylacrylate and a mixture thereof. 13. A composition as claimed in claim 1, wherein the corrosion inhibitor is selected from the group consisting of octyl 1H benzotriazole, ditertiary butylated 1 H-Benzotriazole, propyl gallate, polyoxyalkylene polyols, octadecyl amines, nonyl phenol ethoxylates, calcium phenolates of hydrogenated pentadecyl phenol, magnesium alkyl benzene sulfonates and a mixture thereof. 14. A composition as claimed in claim 1, wherein the lubricity additive is selected from octyl phosphates, methyl hydroxy hydro cinnamide, ethyl hexyl ester of vegetable oil fatty acid, and a mixture thereof. 15. A gear oil composition as claimed in claim 1, having the following characteristics: i) Kinetic viscosity at 40°C is in the range of 40-60 cst, ii) Viscosity index 95-160, iii) Oxidation stability at 121 "C,312hours,l Olit aidhour)- 3 to 4% increase in kinematic viscosity at 100°C iv) Rotatory bomb oxidation test (ROBOT) at 95OC is 180-250 min., V) Flash point 195-225OC, vi) Pour point (-)21 to (-)3g°C, vii) Ash sulfated ~0.08, viii) ix) )o xi) xii) xiii) xiv) xv) xvi) Lubricity-Friction.Coeff. (HFRR) - 0.101 to 1 16,mm Wear Scar Dia (WSD) (HFRR) - 0.533 to 0.566,mm Total acid number, mg KOHIgm - nil Copper Strip corrosion test IA, Foam test @ 10 min, ml, 24-93.5-24193.5OC is 2-1-2 to 4-2-4, Biodegradability 40-50%. Air release, @50°C,minuts is 6 to 9, Demulsibility (water in oil) 5 hours test, 0.2 to 0.4 % Rust test, 24 hours in sea water, no rust

Documents:

786-del-2006-abstract.pdf

786-del-2006-Claims-(06-02-2013).pdf

786-DEL-2006-Claims-(22-02-2012).pdf

786-del-2006-claims.pdf

786-del-2006-Correspondence Others-(06-02-2013).pdf

786-DEL-2006-Correspondence Others-(22-02-2012).pdf

786-del-2006-correspondence-others.pdf

786-del-2006-description (complete).pdf

786-del-2006-description (provisional).pdf

786-del-2006-form-1.pdf

786-del-2006-form-2.pdf

786-del-2006-Form-3-(06-02-2013).pdf

786-del-2006-form-3.pdf

786-del-2006-form-5.pdf