EP0393732A2 - Compositions thermo-oxydativement stables - Google Patents

Compositions thermo-oxydativement stables Download PDF

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Publication number
EP0393732A2
EP0393732A2 EP90200552A EP90200552A EP0393732A2 EP 0393732 A2 EP0393732 A2 EP 0393732A2 EP 90200552 A EP90200552 A EP 90200552A EP 90200552 A EP90200552 A EP 90200552A EP 0393732 A2 EP0393732 A2 EP 0393732A2
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EP
European Patent Office
Prior art keywords
composition
zinc
percent
mixture
succinic acid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP90200552A
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German (de)
English (en)
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EP0393732A3 (fr
Inventor
Lawrence Vincent Gallacher
Alfen John Gustavsen
Robert Louis Kugel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
King Industries Inc
Original Assignee
King Industries Inc
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Priority claimed from US07/341,515 external-priority patent/US5133900A/en
Priority claimed from US07/341,516 external-priority patent/US5169564A/en
Application filed by King Industries Inc filed Critical King Industries Inc
Publication of EP0393732A2 publication Critical patent/EP0393732A2/fr
Publication of EP0393732A3 publication Critical patent/EP0393732A3/fr
Withdrawn legal-status Critical Current

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Definitions

  • thermooxidatively stable sulfonate containing compositions More particularly, it concerned with the thermooxidative stabilization of normally thermooxidatively unstable organic compounds including both natural and synthetic media.
  • Alkali metal and alkaline earth metal salts of high molecular weight alkaryl and petroleum sulfonic acids have long been widely used as dispersants and rust or corrosion inhibitors in a number of applications such as in lubricating oils, greases and rust-preventative coatings.
  • alkali metal and alkaline earth metal sulfonates can be combined with carboxylic acids, esters or soaps to enhance corrosion and oxidation inhibiting properties, e.g., U.S. 3,090,750; U.S. 3,625,894; U.S. 3,684,726; U.S. 3,763,042; U.S. 4,201,681; and Japanese Patent Publication 48/12238.
  • Lipinski et al. disclose a metal-working lubricant composition comprising a mineral oil and an additive combination of barium lanolate soap and barium sulfonate, e.g., barium didodecyl benzene sulfonate.
  • the compositions of Lipinski et al. are tested for a number of characteristics, e.g., corrosion, stain and drawing properties, stack test for stain and friction measurements, visual observation for galling and scoring, however no enchanced stability to thermooxidation was investigated or demonstrated.
  • thermooxidative stabilizing composition comprising an oil-soluble barium, calcium, magnesium or zinc sulfonate; a primary antioxidant; optionally an alkali or alkaline earth metal or zinc soap of an alkyl or alkenyl succinic acid, a partially esterified alkyl or alkenyl succinic acid or a mixture of any of the foregoing; optionally, a secondary antioxidant; and optionally a carrier for the thermooxidative stabilizing composition.
  • thermooxidative stabilizer composition or package components When incorporated into normally thermooxidatively unstable organic compounds, oxidative degradation as well as deterioration caused by thermal effects are inhibited by the synergistic effect of the thermooxidative stabilizer composition or package components to a greater degree than is recognized in compositions of the prior art including those stabilized by a primary antioxidant and/or secondary antioxidant alone, oil soluble metal sulfonates alone or oil soluble metal sulfonates stabilized by alkali or alkaline earth metal or zinc soap of alkyl or alkenyl succinic acid, partially esterified alkyl or alkenyl succinic acid or mixtures thereof alone.
  • thermo­oxidation stabilizer packages comprising only the thermooxidative stabilizer composition from above for use in the stabilization of normally thermooxidatively unstable organic compounds.
  • thermooxidatively stabilized compositions comprising (A) a normally thermooxidatively unstable organic compound; and an effective amount of (B) a thermooxidative stabilizing composition comprising (i) an oil-soluble sulfonate of a metal selected from barium, calcium, magnesium, zinc or a mixture of any of the foregoing; (ii) an effective amount of a stabilizer comprising an alkali or alkaline earth metal or zinc soap of an alkyl or alkenyl succinic acid, a partially esterified alkyl or alkenyl succinic acid, or a mixture of any of the foregoing; (iii) an effective amount of at least one primary antioxidant; optionally, (iv) an effective amount of a secondary antioxidant; and optionally, (v) a carrier for the thermooxidative stabilizing composition.
  • a normally thermooxidatively unstable organic compound comprising (i) an oil-soluble sulfonate of a metal selected from barium, calcium, magnesium, zinc or a mixture of any of the for
  • thermooxidatively stabilized compositions comprising (A) a normally thermooxidatively unstable organic compound; and an effective amount of (B) a thermooxidative stabilizing composition comprising (i) an oil-soluble sulfonate of a metal selected from barium, calcium, magnesium, zinc or a mixture of any of the foregoing; (ii) an effective amount of at least one primary antioxidant; optionally, (iii) an effective amount of a secondary antioxidant; and optionally, (iv) a carrier for the thermooxidative stabilizing composition.
  • the invention also provides methods for stabilizing a normally thermooxidatively unstable organic compound comprising blending with the compound, an effective amount of either of the thermooxidative stabilizing compositions (B) from above.
  • thermooxidative stabilizer compositions or packages comprising only either of components (B) from above.
  • thermooxidatively unstable organic compounds which are used in the present invention include naturally occurring and synthetic organic compounds. These include, but are not limited to, petroleum products, lubricating oils of the aliphatic ester type, e.g., dihexyl azelate, di-(2-ethylhexyl)­azelate, di-(3,5,5-trimethylhexyl)glutarate, diisoamyl adipate, pentacrythritol tetracaproate, triamyl tricarballate, dipropylene glycol dipelargonate, 1,5-pentanediol di-(2-ethylhexanoate), and the like; animal and vegetable dervied oils, e.g., linseed oil, fat, tallow, lard, peanut oil, cod liver oil, castor oil, palm oil, corn oil, cotton seed oil and the like; hydrocarbon materials such as gasoline, both natural and synthetic, diesel oil, mineral oil,
  • thermooxidatively stabilized according to the present invention include cross-linked and thermoplastic resins having linear, branched and/or ring hydrocarbon sequences in the backbone or the side chain, and optionally substituted with, for example, oxygen, nitrogen and/or phosphorous; thermosetting polymers and various synthetic organic polymeric substances such as vinyl resins formed from the polymerization of vinyl halides or from the copolymerization of vinyl halides with unsaturated polymerizable compounds, e.g., vinyl esters, alpha,beta-unsaturated acids, alpha,beta-unsaturated esters, alpha,beta-unsaturated ketones, alpha,beta-­unsaturated aldehydes and unsaturated hydrocarbons such as butadienes and styrene; polyalphaolefins such as polyethylene, polypropylene, polybutylene, polyisoprene and the like, including copolymers of poly-alpha-olefins,
  • the barium, calcium, magnesium or zinc metal sulfonates useful in the practice of this invention include a wide variety of compounds known to those skilled in the art.
  • the alkaryl or polyalkaryl sulfonates may be prepared by following the teachings of U.S. Pat. Nos. 2,764,548, 3,957,859, and 4,201,681.
  • Aromatic organic substrates such as aromatic petroleum fractions, as well as benzene and its analogs, e.g., alkylbenzenes, toluene, the xylenes, polyalkyl­benzenes, and higher alkyl mono- and di- and polysubstituted benzenes, such as nonyl and decyl and dodecyl, straight and branched chain-substituted benzenes and the corresponding naphthalenes, form sulfonates which are preferentially oil soluble (selectively extractable with organic hydrocarbon solvents, and the like), and sulfonates which are preferentially water soluble (and alcohol soluble, being selectively extractable with water and alcohols, and the like).
  • aromatic mono- and disulfonic acids e.g., dinonylnaphthalene mono- and polysulfonic acids are well described in the afore­mentioned U.S. 3,957,859.
  • these alkyl or polyalkylaryl sulfonic acids will have molecular weights in the range of greater than 150-2,500 or greater, preferably 200 or greater, most preferably 325 or greater.
  • Suitable sulfonates are those having an alkaryl group, e.g., alkylated benzene or alkylated naphthalene.
  • Illustrative examples of such sulfonic acids are dioctyl benzene sulfonic acid, didodecyl benzene sulfonic acid, dinonyl naphthalene sulfonic acid, dilauryl benzene sulfonic acid, lauryl cetyl benzene sulfonic acid, polyolefin alkylated benzene sulfonic acids such as polybutylene alkylated benzene sulfonic acid and polypropylene alkylated benzene sulfonic acid.
  • aromatic sulfonates are dinonylnapthalene sulfonates, nonylnaphthalene sulfonates, petroleum sulfonates, dodecenylbenzene sulfonates, and the like.
  • the metal salt or sulfonate salt useful in the present invention is a salt of barium, calcium, magnesium, zinc or a mixture of any of the foregoing.
  • the metal sulfonates may be formed by conventional methods known to those skilled in the art.
  • the metal salts of aromatic sulfonic acids may be prepared by reacting an inorganic metal donor compound, e.g., metal hydroxide, metal oxide or metal carbonate with the alkyl or dialkyl or polyalkyl aromatic sulfonic acid.
  • an inorganic metal donor compound e.g., metal hydroxide, metal oxide or metal carbonate
  • the reaction of any of barium hydroxide, calcium oxide, magnesium oxide, zinc hydroxide, and the like with the corresponding alkaryl sulfonic acid will yield suitable metal sulfonates.
  • thermooxidative stabilizing composition Suitable components of the thermooxidative stabilizing composition are barium, calcium, magnesium or zinc sulfonates such as barium dinonylnaphthalene sulfonate; calcium dinonylnaphthalene sulfonate; magnesium dinonylnaphthalene sulfonate; zinc dinonylnaphthalene sulfonate; barium alkylbenzene sulfonate, particularly barium dodecenylbenzene sulfonate; calcium alkylbenzene sulfonate, particularly calcium dodecenylbenzene sulfonate; magnesium alkylbenzene sulfonate, particularly magnesium dodecenylbenzene sulfonate, zinc alkylbenzene sulfonate, particularly zinc dodecenylbenzene sulfonate; or a mixture of any of these.
  • barium dinonylnaphthalene sulfonate Especially preferred are barium dinonylnaphthalene sulfonate, calcium dinonylnapthalene sulfonate, magnesium dinonylnaphthalene sulfonate, and zinc dinonylnaphthalene sulfonate which are available under the respective tradenames NA-SUL® BSN, NA-SUL® CA, NA-SUL® MG, and NA-SUL® ZS, King Industries.
  • the alkyl or alkenyl succinic acid or the partially esterified alkyl or alkenyl succinic acid will have from 6 to about 50 carbon atoms, and most preferably will have from about 10 to about 30 carbon atoms.
  • the compounds useful as the optional stabilizer can be obtained by any known method but are generally obtained by reacting an inorganic metal donor compound, e.g., barium, calcium, magnesium or zinc and the like, with the appropriate alkyl or alkenyl succinic acid or partially esterified alkyl or alkenyl succinic acid.
  • an inorganic metal donor compound e.g., barium, calcium, magnesium or zinc and the like
  • barium, calcium, magnesium or zinc soaps of the half methyl ester of dodecenylsuccinic acid are especially preferred.
  • One convenient method of preparation is to react the alkyl or alkenyl succinic acid or corresponding anhydride or partial ester with a metal donor, such as barium hydroxide monohydrate, calcium oxide, magnesium oxide or zinc hydroxide monohydrate in the presence of a metal sulfonate as described above and a small amount of lubricating oil at ambient or slightly elevated temperature.
  • the formed soap is then dehydrated by heating, and the lubricating oil component is added with stirring.
  • the primary antioxidants of the present invention can be at least one phenolic antioxidant, at least one aromatic amine antioxidant, or a combination of any of the foregoing.
  • Monophenols, bisphenols, thiobisphenols and polyphenols are all suitable phenolic antioxidants.
  • the phenolic antioxidant will comprise a hindered phenolic antioxidant, esters thereof including those disclosed in Dexter et al., U.S. Patent No. 3,285,855, or a combination of any of the foregoing.
  • Suitable primary antioxidants are methylene bis-4,4′-2,6-di-t-butyl phenol, 4,4′-dioctyldiphenylamine, alkylated phenyl-alpha-naphthylamines, t-butyl phenol derivatives, alkylated diphenylamines, phenyl-alpha­naphthylamine, sulfur containing hindered bisphenols, or a mixture of any of the foregoing.
  • the synergistic effect of the metal sulfonate, the optional stabilizer, and the primary antioxidant components may optionally be enhanced by the additional synergism of an effective amount of a secondary antioxidant with the three previous components.
  • a secondary antioxidant will typically comprise a thiocarbamate, a thioester, or a combination of any of the foregoing and preferably will comprise zinc diamylthiocarbamate wherein R is C5H11; or zinc diabutylthiocarbamate wherein R is C4H9.
  • the optional carriers can comprise a synthetic hydrocarbon base fluid such as a polyalpha­olefin or a mixture of polyalphaolefins, mineral oil, a wax, an ester, a halocarbon fluid, polyglycol, mixtures of any of the foregoing and the like.
  • a synthetic hydrocarbon base fluid such as a polyalpha­olefin or a mixture of polyalphaolefins, mineral oil, a wax, an ester, a halocarbon fluid, polyglycol, mixtures of any of the foregoing and the like.
  • Preferred as the carrier are crystalline wax, mineral spirits, or kerosene.
  • Especially preferred as the carrier are light mineral oil, polyalphaolefins or mixtures thereof.
  • the mineral oils useful in the composition of this invention as carriers will generally have a viscosity of at least about 30 SUS up to about 600 SUS at 100°F (37.7°C). More particularly, the mineral oils will have a viscosity of from about 40 SUS to about 350 SUS at 100°F (37.7°C) and preferably from about 50 to about 150 SUS at 100°F (37.7°C).
  • the term light mineral oil generally is accepted to mean an oil with a viscosity of less than about 150 SUS at 100°F.
  • the mineral oils can vary widely in refinement, and they can be derived from a variety of crudes including paraffinic, naphthenic, asphaltic or mixed base.
  • the mineral oils can be treated by any of the conventional refining methods including hydrogen treating, acid treating, extraction, etc., and blends or mixtures of such mineral oils can also be used.
  • component (A) will comprise from about 95 to about 99.95 percent by weight and component (B) will comprise from about 5 to about 0.05 percent by weight of (A) and (B) combined.
  • the metal sulfonate component will comprise from about 2 to about 25 percent by weight; the optional stabilizer component will comprise from about 3 to about 15 percent by weight; the primary antioxidant component will comprise from about 20 to about 90 percent by weight; the secondary antioxidant component will comprise from zero to about 40 percent by weight; and the carrier component will comprise from zero to about 30 percent by weight of the five components of the thermooxidative stabilizing composition combined.
  • the metal sulfonate component will comprise from about 2 to about 20 percent by weight; the primary antioxidant component will comprise from about 40 to about 90 percent by weight; the secondary antioxidant component will comprise from zero to about 50 percent by weight; and the carrier component will comprise from zero to about 30 percent by weight of the four components combined.
  • Thermooxidative stability includes protection against thermal degeneration and oxidative degeneration.
  • compositions of the present invention can be employed in a number of applications including but not limited to use as compressor oils, engine oils, gear oils, hydraulic fluids, rust preventives, slushing oils, synthetic lubricants and turbine oils.
  • these compositions can be employed in any application requiring thermooxidative stability.
  • These compositions are particularly useful in high temperature applications, e.g., greater than 150°C, especially greater than 180°C, and even greater than 200°C for prolonged periods of time. Many of these compositions also exhibit enhanced rust and corrosion inhibiting properties.
  • a method of stabilizing normally thermooxidatively unstable organic compounds comprises blending by any conventional means known to one of ordinary skill in the art such as mixing, stirring, dispersing, and the like, with the normally thermooxidatively unstable organic compound, an effective amount of the thermooxidative stabilizing composition or packages from above.
  • Induction period is the period of protection afforded against oxidation and/or increase in acid value.
  • Thermooxidative stability is reflected by change in acid value (mg KOH/g), color, sludge formation, length of induction period, change in viscosity, infrared absorption or a combination of any of the foregoing.
  • ASTM Test Method D4636-86 (a combination of Federal Test Methods 5307.1 and 5308.6) and a modified version of the IP48 test are incorporated in many of the examples below.
  • test sample 200 ml of test sample are weighed into a large glass tube (cell) having an outside diameter of 51 mm and a length of approximately 350 mm exclusive of a large ground glass joint designed to accept an adapter head.
  • the head approximately 100 mm in height, contains standard taper ground glass joints for a reflux condenser, a thermowell and an O ring compression fit joint for accepting an air delivery tube.
  • the thermowell is made of 5 mm OD glass tubing, is approximately 425 mm long, and comes to within 35 mm of the bottom of the tube.
  • the temperature of the sample is monitored using a type J thermocouple attached to a remote thermometer.
  • the air delivery tube is made of 6 mm OD glass tubing, is approximately 535 mm in length and is inserted to within 5 mm of the bottom of the tube.
  • a flange is placed approximately 15 mm from the bottom of the air tube and on this flange are stacked in order, from the bottom, washer shaped specimens of aluminum alloy, silver, silicon-iron bronze, steel grade 1010, steel M50, magnesium, and titanium 8 percent manganese.
  • the washers are 6.35 mm inside diameter by 19.05 mm outside diameter by 0.81 mm thick and are polished with 400 grit silicon carbide paper before use. Glass spacers, 9 mm OD and 6 mm in length, are used to separate the washers. Dry air is passed through the sample at 10 ⁇ 1 liters/hour.
  • sample cells are immersed in high temperature silicone fluid, thermostatically heated in a Sta-Warm heating bath. Samples are removed through the thermowell joint in the head through a U shaped tube approximately 600 mm long, to reach to the bottom of the main sample tube.
  • the modified IP48 test is conducted as follows:
  • test sample 36 grams are weighed into a large glass tube having an outside diameter of 38 mm and a length of approximately 200 mm exclusive of a standard taper ground glass joint at the top.
  • An adapter containing a gas inlet tube, 8 mm OD, reaching to the bottom is inserted into the large glass tube, and a reflux condenser is fitted to the top.
  • Lengths of copper and iron catalyst, each approximately 460 mm long, are braided around the gas inlet tube to form a tight coil approximately 50 mm long.
  • the catalyst coil is activated by rinsing with heptane, air drying and immersing for one minute in a 15v/v% solution of concentrated hydrochloric acid in acetone. After rinsing with water and then acetone, the coil is air dried.
  • the tube is immersed in a heating bath for 15 minutes and zero grade air is passed through the sample at 15 liters/hour.
  • a 2000 ml flask with a heating mantle, stirrer, condenser and thermometer is charged with 750.1 grams of 40.5 percent active zinc dinonylnaphthalene sulfonate in naphthenic oil, 161.2 grams of dodecenyl­succinic anhydride, 50 grams of 4 cSt synthetic hydrocarbon base fluid (polyalphaolefin mixture - Emery 3004 PAO - Quantum Chemical Corp. - Cincinnati, OH), 20.8 grams of zinc oxide, and 200 grams of methanol and is stirred.
  • the stirred reaction mixture is heated to reflux temperature and is held for two hours.
  • the stirred reaction mixture is then heated to 150°C under vacuum to strip the methanol, and the reaction product is polish filtered.
  • the reaction product (NA-SUL® ZS-HT King Industries) is found to contain 31.36 percent zinc sulfonate and 18.24 percent zinc soap of the half methyl ester of dodecenylsuccinic acid.
  • a 1000 ml flask with a heating mantle, stirrer, condenser, and thermometer is charged with 339.6 grams of a 39.1 percent solution of dinonyl­naphthalene sulfonic acid in heptane and 6.11 grams of low density magnesium oxide.
  • a Dean-Stark trap is placed between the flask and the reflux condenser, and the reactants are heated with stirring to reflux temperature. After 1 1/4 hours, water is removed from the reaction mixture to a pot temperature of 101°C via the trap.
  • the reaction product is cooled, and 165.4 grams of light mineral oil (75 sec. solvent extracted naphthenic oil - Telura® 415 - Exxon Company, U.S.A. - Houston, TX) is added.
  • the heptane is stripped to a pot temperature of 150°C under vacuum (25 torr).
  • the reaction product is cooled to 65°C, and 68.8 grams of dodecenylsuccinic anhydride, 100 grams of methanol and 5.5 grams of low density magnesium oxide is added.
  • the resultant mixture is then heated to reflux temperature and is stirred for 2 hours.
  • the stirred reaction mixture is then heated to 150°C under vacuum to distill the methanol, and the reaction product is filtered.
  • the concentrate (NA-SUL® MG-HT - King Industries) is found to contain 34.33 percent magnesium sulfonate and 20.35 percent magnesium soap of the half methyl ester of dodecenylsuccinic acid.
  • a 72 liter flask is charged with 13,986 grams of a 50.7 percent solution of calcium dinonylnaphthalene sulfonate in naphthenic oil, 3626 grams of isohexadecenyl­succinic anhydride and 4000 grams of methanol and is stirred for 30 minutes. 535.0 grams of calcium hydroxide is added, and the stirred reaction mixture is heated to reflux temperature. After 4 1/2 hours at reflux temperature, methanol is stripped at 150°C under vacuum. 2697 grams of light mineral oil (75 sec. solvent extracted naphthenic oil - Telura® 415 - Exxon Company, U.S.A.) is added and the resultant product is filtered.
  • light mineral oil 75 sec. solvent extracted naphthenic oil - Telura® 415 - Exxon Company, U.S.A.
  • reaction product (NA-SUL® CA-HT - King Industries) is analyzed by hyamine titration and HCl titration and is found to contain 33.94 percent calcium sulfonate and 25.19 percent of the calcium soap of the half methyl ester of isohexadecenylsuccinic acid.
  • a 2000 ml flask is charged with 700 grams of a 50.5 percent solution of barium dinonylnaphthalene sulfonate in naphthenic oil, 147.4 grams of isohexadecenyl­succinic anhydride, 200 grams of methanol and 100 grams of light mineral oil (75 sec. solvent extracted naphthenic oil - Telura® 415 - Exxon Company, U.S.A.) and is blended. 55.6 grams of barium hydroxide monohydrate is added, and the stirred mixture is heated and is stirred at reflux temperature for 2 hours. Methanol is stripped at 150°C under vacuum. An additional 56 grams of light mineral oil (75 sec.
  • a 1000 ml flask with a heating mantle, stirrer, condenser, and thermometer is charged with 75 grams of a 60 percent solution of dodecenylsuccinic acid in naphthenic oil and 225 grams of an overbased barium dinonylnapnthalene sulfonate in light mineral oil with a total base number of 48 and a sulfonate content of 45.7 percent (NA-SUL® BSB - King Industries).
  • the contents of the flask are heated to 100°C and are held for 1 hour with stirring to react the excess base in the sulfonate with the acid to form a mixture of barium soap and unreacted acid.
  • reaction mixture is then heated to 150°C and stripped under vacuum, yielding 287 grams of reaction product.
  • the reaction product is analyzed by acid-base titration and hyamine titration and is found to contain 4.23 percent free carboxylic acid, 16.32 percent of barium soap of dodecenylsulfonic acid and 36.42 percent of barium sulfonate.
  • the resultant product is a clear, viscous brown liquid with an acid value of 16.7 mg KOH/g.
  • a 1000 ml flask with a heating mantle, stirrer condenser and thermometer is charged with 390 grams of a 39 percent solution of dinonylnaphthalene sulfonic acid in heptane, 14.2 grams of zinc oxide and 216 grams of a 4 cSt synthetic hydrocarbon base fluid (polyalphaolefin mixture - Emery 3004 PAO - Quantum Chemical Corp. - Cincinnati, OH).
  • the contents of the flask are heated to reflux temperature and are held for four hours with stirring to react the zinc oxide with the sulfonic acid to form the zinc salt of the sulfonic acid.
  • the stirred reaction mixture is then heated to 150°C at atmospheric pressure to strip the heptane, then cooled to below 100°C, and then stripped under vacuum to yield 214 grams of reaction product.
  • the reaction product is analyzed by hyamine titration and is found to contain 40.95 percent zinc sulfonate.
  • the reaction product (NA-SUL® ZS - King Industries - Norwalk, CT) is a clear viscous brown liquid.
  • a 12,000 ml flask with a heating mantle, stirrer, condenser and thermometer is charged with 27,066 grams of a 38.41 percent solution of dinonyl­naphthalene sulfonic acid in heptane and 478 grams of low density magnesium oxide (MgO) and is stirred.
  • the stirred reaction mixture is heated to reflux temperature.
  • a Dean-Stark trap is placed between the flask and the reflux condenser, and water is removed until the pot temperature is 100°C.
  • the stirred reaction mixture is cooled, and 8400 grams of light mineral oil (75 sec. solvent extracted naphthenic oil - Telura® 415 - Exxon Company, U.S.A. - Houston, TX) is added.
  • the stirred reaction mixture is heated to 150°C under vacuum to strip the heptane, and the resultant clear concentrate is filtered.
  • the reaction product (NA-SUL® MG - King Indusries) is analyzed by hyamine titration and is found to contain 50.28 percent magnesium sulfonate.
  • a blend is prepared by dissolving 2.17 grams of the product prepared by the method of Procedure A (0.67 gram of zinc dinonylnaphthalene sulfonate, 0.38 gram of the zinc soap of the half methyl ester of dodecenylsuccinic acid, 1.12 grams of 4 cSt synthetic hydrocarbon base fluid (polyalphaolefin mixture - Emery 3004 PAO - Quantum Chemical Corp.), (NA-SUL® ZS-HT - King Industries)) and 0.56 gram of primary antioxidant (methylene bis-4,4′-2,6-di-t-butyl phenol - Ethanox® 702 Ethyl Corp.
  • a blend is prepared by mixing 200 ml of solvent refined heavy paraffinic distillate (petroleum - Sunpar® LW110 - Sun Refining and Marketing Company) and 0.4169 gram of primary antioxidant (methylene bis-4,4′-­2,6-di-t-butyl phenol - Ethanox® 702 - Ethyl Corp.). 200 ml of the blend are placed in a test cell which is then exposed to a temperature of 150°C under ASTM D4636-86 conditions.
  • the initial blend is a nearly colorless mobile liquid with an acid value of 0.16 mg KOH/g and a kinematic viscosity at 40°C of 20.7 cSt.
  • the induction period is 83 hours. After 185 hours of exposure, the acid value is 23.39 mg KOH/g, and the viscosity at 40°C is 119.77 cSt.
  • a blend is prepared by dissolving 2.7 grams of the product of Procedure A (0.67 gram of zinc dinonyl­naphthalenic sulfonate, 0.38 gram of the zinc soap of the half methyl ester of dodecenylsuccinic acid, 1.12 grams of 4 cSt synthetic hydrocarbon base fluid (polyalphaolefin mixture - Emery® 3004 PAO - Quantum Chemical Corp.), (NA-SUL® ZS-HT - King Industries)) and 0.56 gram of primary antioxidant (4,4′-dioctyldiphenyl­amine - Vanlube® 81 - R.T. Vanderbilt Co.
  • a blend is prepared by dissolving 0.56 gram of the product prepared by the method of Procedure A (0.174 gram of zinc dinonylnaphthalene sulfonate, 0.098 gram of the zinc soap of the half methyl ester of dodecenylsuccinic acid, 0.288 gram of 4 cSt synthetic hydrocarbon base fluid (polyalphaolefin mixture - Emery® 3004 PAO - Quantum Chemical Corp.), (NA-SUL® ZS-HT - King Industries)) and 0.55 gram of primary antioxidant (4,4′-dioctyldiphenylamine - Vanlube® 81 - R.T.
  • Vanderbilt Co. in 218.9 grams of solvent refined heavy paraffinic distillate (petroleum - Sunpar® LW110 - Sun Refining and Marketing Company). 200 ml of the blend are placed in a test cell which is then exposed to a temperature of 150°C under ASTM D4636-86 conditions.
  • the initial blend is a nearly colorless mobile liquid with an acid value of 0.32 mg KOH/g and a kinematic viscosity at 40°C of 21.35 cSt.
  • the induction period lasts through 88 hours. After 88 hours of exposure, the sample turns to a brown mobile liquid with an acid value of 0.41 mg KOH/g and a viscosity at 40°C of 22.49 cSt.
  • a blend is prepared by dissolving 2.21 grams of the product of Procedure B (1.12 grams of magnesium dinonylnapthalene sulfonate, 0.442 gram of the magnesium soap of the half methyl ester of dodecenylsuccinic acid, 0.708 gram of light mineral oil (75 sec. solvent extracted naphthenic oil - Telura® 415 - Exxon Company, U.S.A.), (NA-SUL® MG-HT - King Industries)) and 0.55 gram of primary antioxidant (4,4′-dioctyldiphenylamine - Vanlube® 81 - R.T.
  • Vanderbilt Co. in 217.2 grams of solvent refined heavy paraffinic distillate (petroleum - Sunpar® LW110 - Sun Refining and Marketing Company). 200 ml of the blend are placed in a test cell which is then exposed to a temperature of 150°C under ASTM D4636-86 conditions.
  • the initial blend is a tan mobile liquid with an acid value of 0.25 mg KOH/g and a kinematic viscosity at 40°C of 20.75 cSt.
  • the induction period lasts through 72 hours. After 72 hours of exposure, the sample turns to a brown mobile liquid with an acid value of 0.62 mg KOH/g and a viscosity at 40°C of 21.13 cSt.
  • a blend is prepared by dissolving 2.2 grams of the product of Procedure C (0.76 gram of calcium dinonylnaphthalene sulfonate, 0.45 gram of the calcium soap of the half methyl ester of dodecenylsuccinic acid, 0.99 gram of light mineral oil (75 sec. solvent extracted naphthenic oil - Telura® 415 - Exxon Company, U.S.A.), (NA-SUL® CA-HT - King Industries)) and 0.55 gram of primary antioxidant (4,4′-dioctyldiphenylamine - Vanlube® 81 - R.T.
  • Vanderbilt Co. in 217.2 grams of solvent refined heavy paraffinic distillate (petroleum - Sunpar® LW110 - Sun Refining and Marketing Company). 200 ml of the blend are placed in a test cell which is then exposed to a temperature of 150°C under ASTM D4636-86 conditions.
  • the initial blend has an acid value of 0.32 mg KOH/g and a kinematic viscosity at 40°C of 20.66 cSt.
  • the induction period lasts 16 hours. After 16 hours of exposure, the acid value is 3.86 mg KOH/g and the viscosity is 24.45 cSt.
  • a blend is prepared by mixing 200 ml of solvent refined heavy paraffinic distillate (petroleum - Sunpar® LW110 - Sun Refining and Marketing Company) and 0.3793 gram of primary antioxidant (4,4′-dioctyldiphenyl­amine - Vanlube® 81 - R.T. Vanderbilt Co.). 200 ml of the blend are placed in a test cell which is then exposed to a temperature of 150°C under ASTM D4636-86 conditions.
  • the initial blend is a nearly colorless mobile liquid with an acid value of 0.14 mg KOH/g and a kinematic viscosity at 40°C of 20.83 cSt.
  • the induction period is 8 hours. After 16 hours, the acid value is 2.97 mg KOH/g, and the viscosity at 40°C is 25.92 cSt.
  • solvent extracted naphthenic oil - Telura® 415) is prepared yielding a blend of 1 percent NA-SUL® CA-HT and 0.25 percent primary antioxidant. Approximately 36 grams of the blend are placed in each of five identical test cells which are exposed to a temperature of 150°C under modified IP48 test conditions. Tubes are removed from the test bath at 16, 21, 26, 31 and 36 hours, and the changes in acid value (mg KOH/g) are -0.02, 0.13, 1.02, 1.21 and 1.32 respectively. No sludge is found in the 16 hour or 21 hour samples, but sludge is seen in the 26 hour sample indicating an induction period that lasts over 21 hours.
  • a blend of a primary antioxidant (a sulfur-­containing hindered bisphenol - Irganox® 415 - Ciba-­Geigy Corp.) dissolved in 249.1 grams of light mineral oil (75 sec. solvent extracted naphthenic oil - Telura® 415 - Exxon Company, U.S.A.) is prepared. Approximately 36 grams of the blend are placed in each of five identical test cells which are exposed to a temperature of 150°C under modified IP48 test conditions. Tubes are removed from the test bath at 16, 22.5, 27.5, 32 and 37.5 hours, and the changes in acid value (mg KOH/g) are 0.41, 1.12, 1.66, 1.89, and 2.13 respectively. The 16 hour sample contains a trace of sludge, but the 22.5 hour sample has a film of sludge on the walls of the tube.
  • a primary antioxidant a sulfur-­containing hindered bisphenol - Irganox® 415 - Ciba-­Geigy Corp.
  • a blend of 0.2471 grams of primary antioxidant (0.1212 gram of a 2,6-di-t-butyl phenol derivative - Irganox® L130 - Ciba-Geigy Corp. and 0.1259 gram of an alkylated phenyl-alpha-naphthylamine - Irganox® L57 - Ciba-Geigy Corp.) dissolved in 99.75 grams of light mineral oil (75 sec. solvent extracted naphthenic oil - Telura® 415 - Exxon Company, U.S.A.) is prepared. 35.16 grams of the blend are placed in a test cell which is then exposed to a temperature of 150°C under modified IP48 test conditions.
  • the initial blend is a clear amber mobile liquid with an acid value of 0.16 mg KOH/g. After 65 hours of exposure, the acid value is 3.5 mg KOH/g, and a quantity of black sludge approximately 1 mm thick covers an area of approximately 20 cm2 at the bottom of the test cell.
  • a blend is prepared by dissolving 2.2 grams of the product of Procedure D (0.75 gram of barium dinonylnaphthalene sulfonate, 0.44 gram of the barium soap of the half methyl ester of dodecenylsuccinic acid, 1.01 grams of light mineral oil (75 sec. solvent extracted naphthenic oil - Telura® 415 - Exxon Company, U.S.A.), (NA-SUL® BSN-HT - King Industries)) and 0.55 gram of primary antioxidant (4,4′-dioctyldiphenylamine - Vanlube® 81 - R.T.
  • Vanderbilt Co. in 217.2 grams of solvent refined heavy paraffinic distillate (petroleum - Sunpar® LW110 - Sun Refining and Marketing Company). 200 ml of the blend are placed in a test cell which is then exposed to a temperature of 150°C under ASTM D4636-86 conditions.
  • the initial blend has an acid value of 0.34 mg KOH/g and a kinematic viscosity at 40°C of 20.80 cSt.
  • the induction period lasts 16 hours. After 16 hours of exposure, the acid value is 2.72 mg KOH/g and the viscosity at 40°C is 23.40 cSt.
  • a blend is prepared by dissolving 2.2 grams of the product of Procedure E (a partially neutralized 36.42 percent barium sulfonate, 16.32 percent barium soap of dodecenylsuccinic acid composition, (NA-SUL® BSB-DA - King Industries)) and 0.55 gram of primary antioxidant (4,4′-dioctyldiphenylamine - Vanlube® 81 - R.T. Vanderbilt Co.) in 217.2 grams of solvent refined heavy paraffinic distillate (petroleum - Sunpar® LW110 - Sun Refining and Marketing Company). 200 ml of the blend are placed in a test cell which is then exposed to a temperature of 150°C under ASTM D4636-86 conditions.
  • the initial blend has an acid value of 0.45 mg KOH/g and a kinematic viscosity at 40°C of 20.71 cSt.
  • the induction period lasts 16 hours. After 16 hours of exposure, the acid value is 3.12 mg KOH/g and the viscosity at 40°C is 23.95 cSt.
  • Examples 1, 2, 3, 4, 6 and 7 demonstrate the synergistic effect of the metal sulfonate, the stabilizer and the primary antioxidant components of the present invention on the thermooxidative stability of petroleum compounds and mineral oils.
  • Comparative Examples 1A*, 1B*, 5A*, 6A* and 6B* it is clearly shown that the synergism of the components provides enhanced thermooxidative stability over compositions containing none of the metal sulfonate, stabilizer or primary antioxidant components or only the primary antioxidant.
  • Example 6 provides better results than Example 5.
  • Example 6 is performed under different test conditions with a different normally unstable organic compound than is Example 5.
  • Example 7 provides better results than Examples 8 and 9.
  • Example 7 is performed under different test conditions with a different normally unstable organic compound than Examples 8 and 9 as well.
  • a blend of 1 percent by weight of the product prepared by Procedure A (31.36 percent zinc dinonyl­naphthalene sulfonate, 18.24 percent zinc soap of the half methyl ester of dodecenylsuccinic acid, 50.40 percent 4 cSt synthetic hydrocarbon base fluid (polyalphaolefin mixture - Emery® 3004 PAO - Quantum Chemical Corp.), (NA-SUL® ZS-HT - King Industries)), 0.25 percent weight of primary antioxidant (alkylated phenyl-alpha-naphthylamine - Irganox® L06 - Ciba-Geigy Corp.), and 98.75 percent by weight of 4 cSt synthetic hydrocarbon base fluid (polyalphaolefin mixture - Emery® 3004 PAO - Quantum Chemical Corp.) is prepared.
  • a blend of 1 percent by weight of the product prepared by the method of Procedure A (31.36 percent zinc dinonylnaphthalene sulfonate, 18.24 percent zinc soap of the half methyl ester of dodecenylsuccinic acid, 50.40 percent 4 cSt synthetic hydrocarbon base fluid (polyalphaolefin mixture - Emery® 3004 PAO - Quantum Chemical Corp.), (NA-SUL® ZS-HT - King Industries)), and 99 percent by weight of 4 cSt synthetic hydrocarbon base fluid (polyalphaolefin mixture - Emery® 3004 PAO) is prepared.
  • a blend of 0.25 percent by weight primary antioxidant (alkylated phenyl-alpha-naphthylamine - Irganox® L06 - Ciba-Geigy Corp.) and 99.75 percent by weight of 4 cSt synthetic hydrocarbon base fluid (polyalphaolefin mixture - Emery® 3004 PAO - Quantum Chemical Corp.) is prepared. 200 ml of the blend are placed in a test cell which is then exposed to a temperature of 175°C under ASTM D4636-86 conditions. The induction period is 28 hours. After 88 hours of exposure, the acutal increase in acid value is 5.47, and the viscosity at 40°C increases 77.3 percent. Intermediate and final changes in acid value are illustrated in FIG. 1.
  • a blend of 1 percent by weight of the product prepared by the method of Procedure A (31.36 percent zinc dinonylnaphthalene sulfonate, 18.24 percent zinc soap of the half methyl ester of dodecenylsuccinic acid, 50.40 percent 4 cSt synthetic hydrocarbon base fluid (polyalphaolefin mixture - Emery® 3004 PAO - Quantum Chemical Corp.), (NA-SUL® ZS-HT - King Industries)), 0.10 percent by weight of primary antioxidant (alkylated phenyl-alphanaphthylamine - Irganox® L06 - Ciba-Geigy Corp.), and 99.9 percent by weight of 4 cSt synthetic hydrocarbon base fluid (polyalphaolefin mixture - Emery® 3004 PAO) is prepared.
  • a blend of 1 percent by weight of the product prepared by the method of Procedure A (31.36 percent zinc dinonylnaphthalene sulfonate, 18.24 percent zinc soap of the half methyl ester of dodecenylsuccinic acid, 50.40 percent 4 cSt synthetic hydrocarbon base fluid (polyalphaolefin mixture - Emery® 3004 PAO - Quantum Chemical Corp.), (NA-SUL® ZS-HT - King Industries)), 0.25 percent by weight of primary antioxidant (4,4′-dioctyl­phenylamine - Vanlube® 81 - R.T.
  • Vanderbilt Co. 98.75 percent by weight of 4 cSt synthetic hydrocarbon base fluid (polyalphaolefin mixture - Emery® 3004 PAO) is prepared. 200 ml of the blend are placed in a test cell which is then exposed to a temperature of 175°C under ASTM D4636-86 conditions. The induction period lasts over 88 hours. After 88 hours, the actual increase in acid value is 0.01 mg KOH/g, and the viscosity at 40°C increases 0.29 percent.
  • 4 cSt synthetic hydrocarbon base fluid polyalphaolefin mixture - Emery® 3004 PAO
  • a blend of 0.25 percent by weight of primary antioxidant (4,4′-dioctylphenylamine - Vanlube® 81 - R.T. Vanderbilt Co.) and 99.75 percent by weight of 4 cSt synthetic hydrocarbon base fluid (polyalphaolefin mixture - Emery® 3004 PAO - Quantum Chemical Corp.) is prepared. 200 ml of the blend are placed in a test cell which is then exposed to a temperature of 175°C under ASTM D4636-86 conditions. There is no induction period. After 88 hours of exposure, the actual increase in acid value is 6.21, and the viscosity at 40°C increases 121.1 percent.
  • a blend of 1 percent by weight of the product prepared by Procedure A (31.36 percent zinc dinonyl­naphthalene sulfonate, 18.24 percent zinc soap of the half methyl ester of dodecenylsuccinic acid, 50.40 percent 4 cSt synthetic hydrocarbon base fluid (polyalphaolefin mixture - Emery® 3004 PAO - Quantum Chemical Corp.), (NA-SUL® ZS-HT - King Industries)), 0.25 percent by weight of primary antioxidant (a t-butyl phenol derivative - Irganox® L130 - Ciba-Geigy Corp.) and 98.75 percent by weight of 4 cSt synthetic hydrocarbon base fluid (polyalphaolefin mixture - Emery® 3004 PAO) is prepared.
  • a blend of 0.25 percent by weight of primary antioxidant (a t-butyl phenol derivative - Irganox® L130 - Ciba-Geigy Corp.) and 99.75 percent by weight of 4 cSt synthetic hydrocarbon base fluid (polyalphaolefin mixture - Emery® 3004 PAO - Quantum Chemical Corp.) is prepared. 200 ml of the blend are placed in a test cell which is then exposed to a temperature of 175°C under ASTM D4636-86 conditions. The induction period lasts 26 hours. After 88 hours of exposure, the actual increase in acid value is 5.61 mg KOH/g, and the viscosity at 40°C increases 95.9 percent.
  • a blend of 1 percent by weight of the product prepared by the method of Procedure A (31.36 percent zinc dinonylnaphthalene sulfonate, 18.24 percent zinc soap of the half methyl ester of dodecenylsuccinic acid, 50.40 percent 4 cSt synthetic hydrocarbon base fluid (polyalphaolefin mixture - Emery® 3004 PAO - Quantum Chemical Corp.), (NA-SUL® ZS-HT - King Industries)), 0.25 percent by weight of primary antioxidant (phenyl-alpha­naphthylamine - PANA - Aldrich Chemical Company - Milwaukee, WI - recrystallized) and 98.75 percent by weight of 4 cSt synthetic hydrocarbon base fluid (polyalphaolefin mixture - Emery® 3004 PAO) is prepared.
  • a blend of 0.25 percent by weight of primary antioxidant (phenyl-alpha-naphthylamine - PANA - Aldrich Chemical Company - Milwaukee, WI - recrystallized) and 99.75 percent by weight of 4 cSt synthetic hydrocarbon base fluid (polyalphaolefin mixture - Emery® 3004 PAO - Quantum Chemical Corp.) is prepared. 200 ml of the blend are placed in a test cell which is then exposed to a temperature of 175°C under ASTM D4636-86 conditions. The induction period lasts 48 hours. After 88 hours of exposure, the actual increase in acid value is 4.27 mg KOH/g, and the viscosity at 40°C increases 53.8 percent.
  • a blend of 1 percent by weight of the product prepared by the method of Procedure A (31.36 percent zinc dinonylnaphthalene sulfonate, 18.24 percent zinc soap of the half methyl ester of dodecenylsuccinic acid, 50.40 percent 4 cSt synthetic hydrocarbon base fluid (polyalphaolefin mixture - Emery® 3004 PAO - Quantum Chemical Corp.), (NA-SUL ZS-HT - King Industries)), 0.25 percent by weight of primary antioxidant (1:1 wt. ratio blend of an alkylated diphenylamine - Irganox® L57 - Ciba-Geigy Corp.
  • 4 cSt synthetic hydrocarbon base fluid polyalphaolefin mixture - Emery® 3004 PAO - Quantum Chemical Corp.
  • Examples 10, 12, 13, 14, and 15 demonstrate the use of different primary antioxidants in achieving the synergistic effects of the present invention and of the application of the thermooxidative stabilizing package of the present invention in synthetic hydrocarbon base fluids.
  • Example 10 when compared with Comparative Examples 10A*, 10B* and 10C* clearly demonstrates that the synergistic effect of the metal sulfonate, stabilizer and primary antioxidant components (Example 10) result in superior thermooxidative stability to that which would result from just a combining effect of these components.
  • Comparative Example 10B* indicates that the combination of the metal sulfonate component and the stabilizer component alone results in an acid value only 0.82 mg KOH/g less than the unstable organic compound, provides no induction period and results in a significant increase in viscosity at 40°C.
  • Comparative Example 10C* indicates that the primary antioxidant component alone results in an acid value only 2.21 mg KOH/g lower than the unstable organic compound, provides no induction period and results in significant increases in viscosity at 40°C. Example 10, however, results in no increase in acid value, an 88 hour induction period and a decrease in viscosity.
  • the synergistic effect of the metal sulfonate, the stabilizer and the primary antioxidant components (Example 10) is greater than the mere combined effects of Comparative Examples 10B* and 10C*.
  • Example 11 when compared with Example 10 illustrates that full synergism does not tend to occur if components are present in less than recommended amounts.
  • a blend of 75 grams of polyethylene (AC6 - Allied Signal Corp. - Morristown, NJ) and 75 grams of a different polyethylene (AC8 - Allied Signal Corp.) is prepared. Brookfield viscosity at 140°C is determined to be 350-40 cps.
  • the resultant blend is placed in a test cell which is then exposed to a temperature of 175°C under ASTM D4636-86 conditions.
  • the initial sample of the resultant blend has an infrared absorbance of 0.040 at 1723 cm ⁇ 1.
  • the induction period is greater than 24 hours. After 24 hours of exposure, the sample has an infrared absorbance of 0.066 at 1718 cm ⁇ 1.
  • a blend of 75 grams of polyethylene (AC6 - Allied Signal Corp.) and 75 grams of a different polyethylene (AC8 - Allied Signal Corp.) is prepared and is placed in a test cell which is then exposed to a temperature of 175°C under ASTM D4636-86 conditions.
  • the initial sample has an infrared absorbance of 0.039 at 1722 cm ⁇ 1, characteristic of the carbonyl group of carboxylic acids.
  • the induction period is less than 16 hours. After 16 hours of exposure, the sample has an infrared absorption of 0.382 at 1722 cm ⁇ 1 indicating an increased carboxylic acid level.
  • a blend of 75 grams of polyethylene (AC6 - Allied Signal Corp.), 75 grams of a different polyethylene (AC8 - Allied Signal Corp.) and 0.0912 gram of primary antioxidant (methylene bis-4,4′-2,6-di-t-butyl phenol - Ethanox® 702 - Ethyl Corp.) is prepared and is placed in a test cell which is then exposed to a temperature of 175°C under ASTM D4636-86 conditions.
  • the initial sample has an infrared absorbance of 0.039 at 1722 cm ⁇ 1.
  • the induction period is less than 16 hours. After 16 hours of exposure, the sample has an infrared absorption of 0.190 at 1720 cm ⁇ 1.
  • Example 16 and Comparative Examples 16A* and 16B* demonstrate the synergistic properties of the metal sulfonate, the stabilizer and the primary antioxidant components when incorporated into thermoplastic polymers.
  • a blend of 0.2 percent by weight of the product prepared by the method of Procedure A (31.36 percent zinc dinonylnaphthalene sulfonate, 18.24 percent zinc soap of the half methyl ester of dodecenylsuccinic acid, 50.40 percent 4 cSt synthetic hydrocarbon base fluid (polyalphaolefin mixture - Emery® 3004 PAO - Quantum Chemical Corp.), (NA-SUL® ZS-HT - King Industries)), 0.15 percent by weight of primary antioxidant (4,4′-dioctyl­phenylamine - Vanlube® 81 - R.T.
  • Vanderbilt Co. 0.10 percent by weight of secondary antioxidant (zinc diamyldithiocarbamate, 50 percent active in oil - Vanlube® AZ - R.T. Vanderbilt Co.) and 99.65 percent by weight of 4 cSt synthetic hydrocarbon base fluid (polyalphaolefin mixture - Emery® 3004 PAO) is prepared. 200 ml of the blend are placed in a test cell which is then exposed to a temperature of 175°C under ASTM D4636-86 conditions. The initial blend is a colorless mobile liquid with an acid value of 0.33 mg KOH/g and a kinematic viscosity at 40°C of 16.94 cSt. The induction period lasts over 88 hours. After 88 hours of exposure, the acid value is 0.36 mg KOH/g, and the viscosity at 40°C is 16.93 cSt.
  • secondary antioxidant zinc diamyldithiocarbamate, 50 percent active in oil - Vanlube®
  • a blend of 1 percent by weight of the product prepared by the method of Procedure A (31.36 percent zinc dinonylnaphthalene sulfonate, 18.24 percent zinc soap of the half methyl ester of dodecenylsuccinic acid, 50.40 percent 4 cSt synthetic hydrocarbon base fluid (polyalphaolefin mixture - Emery® 3004 PAO - Quantum Chemical Corp.), (NA-SUL® ZS-HT - King Industries)), 0.25 percent secondary antioxidant (zinc diamyldithiocarbamate, 50 percent active in oil - Vanlube® AZ - R.T.
  • Vanderbilt Co. and 98.75 percent by weight of 4 cSt synthetic hydrocarbon base fluid (polyalphaolefin mixture - Emery® 3004 PAO) is prepared.
  • 200 ml of the blend are placed in a test cell which is then exposed to a temperature of 175°C under ASTM D4636-86 conditions.
  • the initial blend is a light tan mobile liquid with an acid value of 0.82 mg KOH/g and a kinematic viscosity at 40°C of 16.96 cSt.
  • the induction period lasts 5 hours. After 5 hours of exposure, the acid value is 6.47 mg KOH/g, and the viscosity at 40°C is 20.67 cSt.
  • a blend of 0.05 percent by weight of the product prepared by the method of Procedure A (31.36 percent zinc dinonylnaphthalene sulfonate, 18.24 percent zinc soap of the half methyl ester of dodecenylsuccinic acid, 50.40 percent 4 cSt synthetic hydrocarbon base fluid (polyalphaolefin mixture - Emery® 3004 PAO - Quantum Chemical Corp.), (NA-SUL® ZS-HT - King Industries)), 0.15 percent by weight of primary antioxidant (4,4′-dioctylphenylamine - Vanlube® 81 - R.T.
  • Vanderbilt Co. 0.10 percent by weight of secondary antioxidant (zinc diamyldithiocarbamate, 50 percent active in oil - Vanlube® AZ - R.T. Vanderbilt Co.), and 99.70 percent by weight of 4 cSt synthetic hydrocarbon base fluid (polyalphaolefin mixture - Emery® 3004 PAO) is prepared. 200 ml of the blend are placed in a test cell which is then exposed to a temperature of 175°C under ASTM D4636-86 conditions. The initial blend is a colorless mobile liquid with an acid value of 0.21 mg KOH/g and a kinematic viscosity at 40°C of 16.94 cSt. The induction period lasts 72 hours. After 72 hours of exposure, the acid value is 3.18 mg KOH/g, and the viscosity at 40°C is 19.29 cSt.
  • secondary antioxidant zinc diamyldithiocarbamate, 50 percent active in oil - Vanlube® AZ
  • a blend of 1 percent by weight of the product prepared by the method of Procedure A (31.36 percent zinc dinonylnaphthalene sulfonate, 18.24 percent zinc soap of the half methyl ester of dodecenylsuccinic acid, 50.40 percent 4 cSt synthetic hydrocarbon base fluid (polyalphaolefin mixture - Emery® 3004 PAO - Quantum Chemical Corp.), (NA-SUL® ZS-HT - King Industries)), 0.25 percent by weight of primary antioxidant (alkylated phenyl-alphanaphthylamine - Irganox® L06 - Ciba-Geigy Corp.), 0.25 percent by weight of secondary antioxidant (zinc diamyldithiocarbamate - Vanlube® AZ - R.T.
  • Vanderbilt Co. 98.5 percent by weight of 4 cSt synthetic hydrocarbon base fluid (polyalphaolefin mixture - Emery® 3004 PAO) is prepared.
  • 200 ml of the blend are placed in a test cell which is then exposed to a temperature of 175°C under ASTM D4636-86 conditions.
  • the initial blend is a light tan mobile liquid with an acid value of 0.79 mg KOH/g and a kinematic viscosity at 40°C of 17.23 cSt.
  • the induction period lasts over 88 hours. After 88 hours of exposure, the acid value is 0.9 mg KOH/g, and the viscosity at 40°C is 16.71 cSt.
  • Examples 17, 18 and 19 and Comparative Example 17A* demonstrate the added synergistic effects of secondary antioxidants when used in conjunction with the metal sulfonate, the stabilizer and the primary antioxidant components.
  • a blend is prepared by dissolving 2.2 grams of the product prepared by the method of Procedure F (0.89 grams of zinc dinonylnaphthalene sulfonate and 1.33 grams of 4 cSt synthetic hydrocarbon base fluid (polyalphaolefin mixture - Emery® 3004 PAO - Quantum Chemical Corp.), (NA-SUL® ZS - King Industries)) and 0.56 grams of primary antioxidant (4,4′-dioctyldiphenylamine Vanlube® 81 - R.T. Vanderbilt Co. - Norwalk, CT) in 217.2 grams of solvent refined heavy paraffinic distillate (petroleum - Sunpar® LW110 - Sun Refining and Marketing Company - Philadelphia, PA).
  • the initial blend is a light tan mobile liquid with an acid value of 0.64 mg KOH/g and a kinematic viscosity at 40°C of 20.87 cSt.
  • the induction period lasts through 185 hours. After 185 hours of exposure, the sample turns to a brown clear mobile liquid, has an acid value of 0.78 mg KOH/g and has a viscosity at 40°C of 20.94 cSt.
  • a blend is prepared by dissolving 2.2 grams of the product prepared by the method of Procedure G (1.11 grams of magnesium dinonylnaphthalene sulfonate and 1.09 grams of light mineral oil (75 solvent extracted naphthenic oil - Telura® 415 - Exxon Company, U.S.A.), (NA-SUL® MG - King Industries) and 0.55 grams of primary antioxidant (4,4′-dioctyldiphenylamine Vanlube® 81 - R.T. Vanderbilt Co.) in 217.2 grams of solvent refined heavy paraffinic distillate (petroleum - Sunpar® LW110 - Sun Refining and Marketing Company).
  • the initial blend is a light tan mobile liquid with an acid value of 0.21 mg KOH/g and a kinematic viscosity at 40°C of 21.30 cSt.
  • the induction period lasts through 185 hours. After 185 hours of exposure, the sample turns to a brown clear liquid, has an acid value of 0.71 mg KOH/g, and has a viscosity of 21.07 cSt.
  • a blend is prepared by dissolving 1.0754 grams of a 50 percent active solution of calcium dinonyl­naphthalene sulfonate in light mineral oil (NA-SUL® 729 - King Industries) in 99.02 grams of a base fluid which is prepared by dissolving 3.5 grams of primary antioxidant (1.76 grams of an alkylated diphenylamine - Irganox® L57 - Ciba-Geigy Corp.
  • a base fluid is prepared by dissolving 3.03 grams of primary antioxidant (1.50 grams of alkylated diphenylamine - Irganox® L57 - Ciba-Geigy Corp. blended with 1.53 grams of a t-butyl phenol derivative - Irganox® L130 - Ciba-Geigy Corp.) in 597.0 grams of a severely hydrotreated heavy naphthenic distillate (Sunthene® 108 Sun Refining and Marketing Company). 52.06 grams of the base fluid are placed in a test cell which is then exposed to a temperature of 150°C under modified IP48 test conditions. The initial sample is a nearly colorless, clear mobile liquid with an acid value of 0.18 mg KOH/g. After 24 hours of exposure, the sample turns to a dark liquid with a layer of black sludge approximately 5 mm thick and an acid value of 5.92 mg KOH/g.
  • a stock solution is prepared by dissolving 12.53 grams of a 39.19 percent solution of zinc dinonylnaphthalene sulfonate in 4 cSt synthetic hydrocarbon fluid (polyalphaolefin mixture - Emery® 3004 PAO - Quantum Chemical Corp.) in 1240 grams of 4 cSt synthetic hydrocarbon base fluid (polyalphaolefin mixture - Emery® 3004 PAO).
  • 4 cSt synthetic hydrocarbon base fluid polyalphaolefin mixture - Emery® 3004 PAO
  • a blend of 3.44 grams of primary antioxidant alkylated phenyl-alpha-naphthylamine - Irganox® L06 - Ciba-Geigy Corp.
  • the initial sample is a light tan mobile liquid with an acid value of 0.48 mg KOH/g and a kinematic viscosity a 40°C of 17.13 cSt.
  • the induction period lasts over 88 hours. After 88 hours of exposure, the acid value is 0.51 mg KOH/g, and the viscosity at 40°C is 17.37 cSt.
  • primary antioxidant an alkylated phenyl-alpha-naphthylamine
  • a blend of 2.2010 grams of a 39.19 percent solution of zinc dinonylnaphthalene sulfonate in 4 cSt synthetic hydrocarbon base fluid polyalphaolefin mixture - Emery® 3004 PAO - Quantum Chemical Corp.
  • 0.5623 gram of primary antioxidant alkylated phenyl-­alpha-naphthylamine - Irganox® L06 - Ciba-Geigy Corp.
  • 0.5547 gram of secondary antioxidant zinc diamyldithio­carbamate, 50 percent active in oil - Vanlube® AZ - R.T.
  • Vanderbilt Co. dissolved in 216.7 grams of 4 cSt synthetic hydrocarbon base fluid (polyalphaolefin mixture - Emery® 3004 PAO) is prepared. 200 ml of the blend are placed in a test cell which is then exposed to a temperature of 175°C under ASTM D4636-86 conditions.
  • the initial blend is a light tan mobile liquid with an acid value of 0.64 mg KOH/g and a kinematic viscosity at 40°C of 17.14 cSt.
  • the induction period lasts over 88 hours. After 88 hours of exposure, the acid value is 0.67 mg KOH/g, and the viscosity at 40°C is 17.47 cSt.
  • Examples 20, 21, 22 and 23 demonstrate the synergistic effect the metal sulfonate and the primary antioxidant components have on thermooxidative stability of normally thermooxidatively unstable natural and synthetic organic compounds.
  • Comparative Examples 1A*, 1B*, 5A*, 10A*, 12A*, 13A*, 14A*, 15A*, 22A* and 23A* they demonstrate that primary antioxidants alone will not impart the thermooxidative stability that the synergistic effect of primary antioxidant and oil soluble barium, calcium, magnesium or zinc sulfonates impart to normally thermooxidatively unstable organic compounds.
  • Example 24 illustrates the further synergism that secondary antioxidants impart.
  • mineral oil and polyalphaolefin as the carrier component, other carriers, such as microcrystalline waxes, dioctyl adipate, silicone oils, and the like can be substituted.
  • Other conventional additives can be added in conventional amounts, such as extreme pressure additives, dispersants and the like. All such obvious variations are within full intended scope of the appended claims.

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  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
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  • Emergency Medicine (AREA)
  • Lubricants (AREA)
  • Anti-Oxidant Or Stabilizer Compositions (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
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US07/341,515 US5133900A (en) 1987-03-16 1989-04-21 Thermooxidatively stable compositions
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EP0599251A1 (fr) * 1992-11-20 1994-06-01 Cosmo Oil Company, Ltd Composition fluide utilisée dans un accouplement visqueux
EP0978554A2 (fr) * 1998-08-04 2000-02-09 Ethyl Petroleum Additives Limited Huiles de turbine ou R&O comprenant des inhibiteurs de rouille neutre

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JP2001187891A (ja) * 1995-04-21 2001-07-10 Hitachi Ltd 潤滑油組成物及び潤滑グリース組成物

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EP0599251A1 (fr) * 1992-11-20 1994-06-01 Cosmo Oil Company, Ltd Composition fluide utilisée dans un accouplement visqueux
EP0978554A2 (fr) * 1998-08-04 2000-02-09 Ethyl Petroleum Additives Limited Huiles de turbine ou R&O comprenant des inhibiteurs de rouille neutre
EP0978554A3 (fr) * 1998-08-04 2000-03-08 Ethyl Petroleum Additives Limited Huiles de turbine ou R&O comprenant des inhibiteurs de rouille neutre
SG85123A1 (en) * 1998-08-04 2001-12-19 Ethyl Petroleum Additives Ltd Turbine and r&o oils containing neutral rust inhibitors

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