GB2239257A - Metal free lubricants. - Google Patents
Metal free lubricants. Download PDFInfo
- Publication number
- GB2239257A GB2239257A GB9027874A GB9027874A GB2239257A GB 2239257 A GB2239257 A GB 2239257A GB 9027874 A GB9027874 A GB 9027874A GB 9027874 A GB9027874 A GB 9027874A GB 2239257 A GB2239257 A GB 2239257A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lubricant composition
- composition according
- carbon atoms
- alkyl
- wear
- 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.)
- Granted
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Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M141/00—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential
- C10M141/10—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential at least one of them being an organic phosphorus-containing compound
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
- C10M133/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms
- C10M133/04—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M133/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
- C10M133/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms
- C10M133/16—Amides; Imides
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- C10M135/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium
- C10M135/02—Sulfurised compounds
- C10M135/04—Hydrocarbons
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- C10M135/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium
- C10M135/02—Sulfurised compounds
- C10M135/06—Esters, e.g. fats
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- C10M135/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium
- C10M135/20—Thiols; Sulfides; Polysulfides
- C10M135/22—Thiols; Sulfides; Polysulfides containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms
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- C10M137/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus
- C10M137/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus having no phosphorus-to-carbon bond
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- C10M137/04—Phosphate esters
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- C10M137/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus having no phosphorus-to-carbon bond
- C10M137/04—Phosphate esters
- C10M137/08—Ammonium or amine salts
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- C10M137/04—Phosphate esters
- C10M137/10—Thio derivatives
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- C10M159/00—Lubricating compositions characterised by the additive being of unknown or incompletely defined constitution
- C10M159/12—Reaction products
- C10M159/20—Reaction mixtures having an excess of neutralising base, e.g. so-called overbasic or highly basic products
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- C10M159/22—Reaction mixtures having an excess of neutralising base, e.g. so-called overbasic or highly basic products containing phenol radicals
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- C10M159/00—Lubricating compositions characterised by the additive being of unknown or incompletely defined constitution
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- C10M159/20—Reaction mixtures having an excess of neutralising base, e.g. so-called overbasic or highly basic products
- C10M159/24—Reaction mixtures having an excess of neutralising base, e.g. so-called overbasic or highly basic products containing sulfonic radicals
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- C10M163/00—Lubricating compositions characterised by the additive being a mixture of a compound of unknown or incompletely defined constitution and a non-macromolecular compound, each of these compounds being essential
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
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- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/20—Natural rubber; Natural resins
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- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/02—Hydroxy compounds
- C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
- C10M2207/024—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings having at least two phenol groups but no condensed ring
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- C10M2207/026—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings with tertiary alkyl groups
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- C10M2207/028—Overbased salts thereof
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- C10M2207/287—Partial esters
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- C10M2207/404—Fatty vegetable or animal oils obtained from genetically modified species
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- C10M2209/084—Acrylate; Methacrylate
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- C10N2040/44—Super vacuum or supercritical use
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/50—Medical uses
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2070/00—Specific manufacturing methods for lubricant compositions
- C10N2070/02—Concentrating of additives
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Description
1 METAL FREE LUBRICANTS This invention relates to lubricant compositions,
and more especially to lubricant compositions which can be used as hydraulic fluids.
Lubricant compositions normally contain a variety of additives incorporated to improve the performance of the lubricant in the environment in which it is to be used. Such additives often contain transition metals. As Is well known, there is now a general need, for environmental reasons, to reduce the use of transition metals which are frequently toxic. For example, lubricants used as hydraulic fluids often contain, as an anti-wear additive, a zinc dialkyl dithiophosphate (a so-called IIZDDP"). It is desirable to be able to provide hydraulic fluids which are zinc free. This is especially true where the hydraulic fluid is to be used in agriculture or arboriculture where spillage of the fluid onto cultivated land may occur and cause pollution of the land and of any drainage or river system connected with it.
It is also desirable on practical grounds to be able to provide an additive system which is suitable for use in all types of hydraulic fluid irrespective of the particular equipment in which it will be used. A universal anti-wear (UAW) additive system for use in such hydraulic fluids must be capable of providing fluids capable of meeting the specifications of the leading hydraulic pump manufacturers, e.g. the Haglunds-Denison HFO specification and the Vickers Vane pump specification. It is a further requirement for such fluids that they must meet higher than load stage 10 performance in the PZG test described in more detail below.
Hydraulic fluids incorporating ZDDPs do not always give the required performance in the FZG test.
There is therefore a need for a metal-free universal anti-wear additive system suitable for use in 1.
lubricant compositions to be used in, for example, piston and screw compressors, industrial gear systems, and, more particularly, in hydraulic fluids.
According to the present invention, a lubricant composition comprises (a) a metal-free anti-wear or load carrying additive containing sulphur and/or phosphorus, and (b) a corrosion inhibitor in the form of an amino succinate ester of formula R3R4C-COOR1 1 X&K7v-k;X5-COOR2 in which R, and R2 are each alkyl of 1 to 30, preferably 1 to 12, carbon atoms, R3, R4 and R5 are each hydrogen or alkyl of 1 to 4 carbon atoms, and R6 and R7 are each hydrogen, alkyl of 1 to 30 carbon atoms, or an acyl group derived from a saturated or unsaturated carboxylic acid of up to 30 carbon atoms, at least one of R6 and R7 being a said acyl group. Preferably R, and R2 are each alkyl of 3 to 6 carbon atoms, e.g. isobutyl, R3, R4 and R5 are each hydrogen, and R6 and R7 are each alkyl of 15 to 20 carbon atoms or an acyl radical derived from a saturated or unsaturated dicarboxylic acid containing 4 to 10 carbon atoms, e.g. octadecyl, octadecenyl, or 3carboxy-l-oxo-2propenyl. An especially preferred component (b) is aspartic acid, N-(3-carboxy-l-oxo-2-propenyl)-N-octadecylbis(2- methylpropyl)ester.
The metal free, and preferably ashless, anti-wear or load carrying additive may be any one of a wide range of sulphur- and/or phosphoruscontaining additives, for example a mono- and/or di-hydrocarbyl phosphate or phosphite wherein the hydrocarbyl radical is alkyl of up to 12 carbon atoms, e.g. n-butyl, iso-butyl, n-amyl, n-octyl, 2-ethylhexyl or n-dodecyl, - or a mixturi thereof, and amine salts of such phosphates and phosphites, for example with 51 primary amines of 4 to 18 carbon atoms, e.g. n-butylamine, n-octylamine, tert-octyl primary amine, n-dodecylamine, the commercially available mixture of tertiary alkyl primary amines such as Primene 81R in which the tertiary alkyl radicals contain 12 to 14 carbon atoms. each, n-octadecylamine, oleylamine, and also secondary and tertiary amines such as di-n- octylamine, and tri-n-octylamine.
other metal-free anti-wear or load carrying additives which can be used in the compositions of the present invention are sulphurized hydrocarbyl phosphites such as mono- and di-hydrocarbyl thiophosphates wherein the hydrocarbyl radical may be aryl, e.g. phenyl, alkylaryl, e.g. alkylphenyl in which the alkyl contains up to 12 carbon atoms. arylalkyl, or aliphatic, e.g. alkyl of up to 12 carbon atoms. Examples of such sulphurized hydrocarbyl phosphites includes diphenylthiophosphate, dinonylphenyl thiophosphates, di-n-butyl thiophosphate, di-isobutyl thiophosphate and di-2-ethylhexyl thiophosphate. Amine salts of such thiophosphates may also be used.
The anti-wear or load-carrying additive may also be a tri-hydrocarbyl di-thiophosphate in which each hydrocarbyl group may be. for example, an aromatic.
alkylaromatic, cycloaliphatic, or aliphatic radical as aforesaid, e.g. isopropyl, n-butyl, isobutyl, n-pentyl, n-hexyl, 2-ethylhexyl or n-dodecyl. The hydrocarbyl group may also be an alkenyl or cycloalkyl radical.
Other metal free antiwear or load carrying additives which can be used in the invention are sulphurized alkenes, e.g. sulphurized isobutene, containing. for example 42 to 48 by weight of sulphur or a sulphurized carboxylic acid or ester thereof in which the acid is, for example a fatty acid such as oleic or linoleic acid, e.g. a sulphurized vegetable oil or animal fat such as rape seed oil or lard oil.
Suitable commercially available sulphurised fatty ester materials of this type include Sulperm IOS (Keil Chemical) and EP oil GE10 (Hornett). These typically contain about 9.5% and about 8.5-9.5% sulphur, 5 respectively.
Dialkylpolysulphides such as t-nonyl trisulphide or t-dodecyl pentasulphide can also be used as the anti-wear or load-carrying additive.
The sulphur or phosphorus containing anti-wear or load carrying additive is advantageously prepared in the way described in our British Patent Application No. 8829597.7 (continued under Application No. 8928565.4 and published as GB-A-2226028). These anti-wear or load- carrying additives are amine salts of phosphorothioic acids of formula:
(R0)2PSO_.HN+R1R2R3 in which the radicals R are the same or different and each is a substituted or unsubstituted hydrocarbyl radical of up to 20 carbon atoms and R,, R2 and R3 are each hydrogen or substituted or unsubstituted hydrocarbyl radicals of up to 22 carbon atoms, not more than 2 of R,, R2 and R3 being hydrogen. When produced by the process of the aforesaid application, such salts have a purity of at least 95% and have little reactivity towards copper, and less than 3% of a phosphite of formula (R0)2P0H in which R is as hereinbefore defined or amine salt thereof. Preferred such amine salts are those in which R is alkyl of 3 to 8 carbon atoms or phenyl and each of R,. R2 and R3 is hydrogen or an alkyl, cycloalkyl or alkenyl radical of 4 to 22 carbon atoms. not more than 2 of R,. R2 and R3 being hydrogen. Preferably R is phenyl, R, and R2 are hydrogen, and R3 is mixed C 12-C 14 tertiary alkyl.
1 1 i Such amine salts are made by forming a mixture of sulphur and the amine in the liquid state, adding to the mixture a phosphite ester of formula (R0)2P0H in an amount at least equivalent to the amount of sulphur under conditions such that the sulphur reacts with the ester but the reaction temperature does not rise above 1300C, and then continuing the reaction until the solid sulphur has substantially disappeared from the reaction mixture. The quantity of amine is adjusted if necessary so that the total quantity of amine is at least equivalent to the quantity of the phosphite ester.
Compatible mixtures of such anti-wear or loadcarrying additives can, of course, also be used.
The proportions of components (a) and (b) in the lubricant compositions of the invention are preferably from 0.05% to 3%, preferably 0.1% to 1.5%, of the antiwear or load carrying additive and from 0.002% to 0.5, preferably 0.05 to 0.25%, by weight of the corrosion inhibitor, such percentages being by weight based on the total weight of the lubricant composition.
The lubricant composition may include as the base fluid any mineral or non-mineral oil suitable for use as a lubricant, or more especially as a hydraulic fluid. Such base stocks include paraffinic lubricating oil base stocks of mineral origin, synthetic oils such as polyalphaolefins, e.g. hydrogenated polydecene, synthetic lubricant esters, such as dialkyl adipates and azelates (in which the alkyl groups typically have 1 to 20 carbon atoms each, e.g. dioctyl azelate. dinonyl adipate, or di-2-ethylhexylazelate) and oils of biological origin including more particularly lubricant vegetable oils such as rape seed oil, jojoba oil, cotton seed oil. peanut oil or palm oil.
it is a particular advantage of the invention that the combination of components (a) and (b) as set out above is compatible with a variety of oils of natural, especially vegetable, origin suitable for use as hydraulic fluids. Such natural oils are biodegradable, and in consequence the present invention makes it possible to provide an effective hydraulic fluid based on a biodegradable base stock such as rape seed oil or jojoba oil and incorporating additives which are free from heavy metals.
When it is to be used in an acidic environment, it can be desirable to incorporate in a lubricant composition of the present invention a third component, viz. (c) an alkaline earth metal alkylbenzene sulphonate, alkylnaphthalene sulphonate, petroleum sulphonate, alkylphenate, alkyl sulphurized phenate, or alkylsalicylate. This material is usually overbased and may also be sulphurized. A sulphurized overbased calcium alkylphenate in which the alkyl group is paranonyl, or a calcium dinony1naphthalenesulphonate is preferably used. The proportion of such additional additive is usually in the range 0.005 to 0.50% based on the total weight of the composition. such compositions are not ashless, but they do not contain heavy metals and thus achieve one of the major objectives of the present invention.
The lubricant compositions of the present invention may incorporate other additives conventionally used in lubricants. for example:
(i) Additional corrosion inhibitors, e.g. amine salts of carboxylic acids such as octylamine octanoate, condensation products of dodecenyl succinic acid or anhydride and a fatty acid such as oleic acid with a polyamine, e. g. a polyalkylene polyamine such as triethylenetetramine. and half esters of alkenyl succinic acids in which the alkenyl radical contains 8 to 24 carbon atoms with alcohols such as polyglycols.
(ii) Ashless dispersants, especially those made by reaction of a polyolefin maleic anhydride reaction product with a polyalkylene polyamine such as triethylene tetramine 1 or tetraethylene pentamine. In such dispersants, the polyolefin is typically polyisobutene having a number average molecular weight of 900 to 1200.
In some circumstances, it may be advantageous to boronate such ashless dispersants. While boron is non-metal, it is ash- forming and its use in the compositions of the invention is not preferred.
(iii) Antioxidants including, for example, phenolic antioxidants such as 2,6-di-tert-butylphenol, 2,6-di-tert- butyl-4-methylphenol, and 4,41-methylenebis(2,6-ditertbutyl-phenol), sulphurized phenolic antioxidants such as 4,41-thiobis(6-tert-butyl-o- cresol) and aromatic amines such as di(nonylphenyl)amine and octylated phenyl-alphanaphthylamine. Mixtures of phenolic antioxidants and aromatic amine antioxidants (e.g. ETHYL R Antioxidant 728 and/or 733 with Naugalube 438L) are preferred. (iv) Copper deactivators, e.g. benzotriazole and its derivatives, thiadiazoles and their derivatives, or tricresyl phosphite. 20 (v) Demulsifying agents, more particularly, surfactants which are preferably ashless, e.g. non-ionic surfactants such as polyglycols. (vi) Viscosity index improvers, e.g. poly(alkylmethacrylates) and olefin copolymers such as ethylene/propylene and styrene/isoprene copolymers, and dispersant viscosity index improvers such as copolymers of an alkylmethacrylate with N-vinylpyrrolidone and olefin copolymers grafted with nitrogen-containing monomers such as diallylformamide. 30 (vii) Pour point depressants such as poly(alkylmethacrylates). (viii) Anti-foam agents, e.g. products based on silicones and poly(alkylacrylates).
All such additional ingredients must of course be compatible with components (a) and (b) but, subject to this, they are used in the usual proportions.
The compositions of the invention are conveniently supplied to the formulator of the finished lubricant composition in the form of an additive concentrate comprising the components (a) and (b) as aforesaid, alone or preferably with a relatively small amount of suitable base oil to facilitate handling, and optionally with one or more of the additional ingredients mentioned above. In such concentrates the amounts of components (a) and (b) are proportioned such that when the concentrate is blended into a base fluid to provide a finished lubricant composition in which the concentration of component (a) is from 0.05 to 3% by weight and preferably from 0.1 to 1.5% by weight based on the total weight of the lubricant composition, the concentration of component (b) is from 0.002 to 0.5% by weight and preferably from 0.05 to 0.25 by weight based on the total weight of the lubricant composition. Thus the ratio of (a) to (b) in such concentrates is preferably 30:1 to 0.4:1. The proportion of component (b) in the concentrate is preferably from 0.1 to 50% by weight, especially 0.1 to 10%, and most commonly 1 to 5% by weight of the concentrate.
The following Examples illustrate the invention.
EXAMPLE 1
Hydraulic fluid blends were prepared using as the base stock an ISO 46 mineral base oil having a kinematic viscosity range at 400C of from 41.4 to 50.6 cSt. The additives incorporated were as stated.below Tables I and II which follow. Each blend was evaluated for clarity and by the IP 135B corrosion test. The latter test involved stirring a mixture of 300 ml of the hydraulic fluid with 30 ml of artificial sea water at a temperature of 600C with a steel cylinder immersed in the mixture. The test was run in duplicate for 24 hours with each blend and the immersed steel specimens were then examined for signs of rusting. For a pass, no rust must be visible on the specimen.
The blends were also examined by the FZG test (IP334/79). In this test two steel spur gears were rotated together with oil dip lubrication for a series of 15 minute stages. The relative torque between the gears was increased by a fixed amount after each stage and the gears were run together for a given period after which they were examined for wear or damage. The result of the test is quoted in terms of the final pass stage and the first fail stage. To be satisfactory, the pass stage must be higher than 10.
The following Tables I and II set out the compositions of the hydraulic fluids tested and the results obtained with each. Blend 4, 5, 6, 7 and 10 are in accordance with the present invention. The other blends are for comparison.
- 10 TABLE 1
CONCENTRATIONS IN WT PERCENTAGE IN IS046 HYDRAULIC FLUID BASE 01 Blend Component A1 Component A2 Component B Corrosion Inhib. D Corrosion Inhib. E Corrosion Inhib. F FZG Load Stage Fail 1 2 3 4 0.07 0.07 0.07 0.07 0.19 0.19 0.19 0.19 - - - 0.02 0.065 - 0.04 0.03 0.02 - 0.075 - 0.07 0.19 0.02 0.025 6 0.1 0.12 0.015 0.025 12 Pass 9 Pass/ Not 12 Pass 12 Pass 12 Pass Fail Tested IP 135 B Fail Fail Not Pass Pass Pass Test Result Moderate Severe Tested No rust No rust No rust Rust Rust Clarity of Blended fluid Clear Clear Cloudy Clear Clear Clear Component A1 was the Primene 81R salt of diphenylthiophosphate.
Component A2 was a blend of 36 di-t-nonyl polysulphide and 64% sulphurised fatty ester component B was aspartic acid, N-(3 carboxy-2-oxo-2-propenyl)N-octadecyl-bis(2-methylpropyl)ester.
Corrosion Inhibitor D was a condensation product of dodecenyl succinic acid and oleic acid with a polyethylene polyamine corrosion Inhibitor E was octylamine octanoate.
Corrosion Inhibitor F was a modified imidazoline (Monamulse CI) Blends 1-6 contained the same levels of conventional antioxidant, copper deactivator and demulse aid.
Blends 2 and 5 additionally contained a boronated polyisobutenyl succinimide ashiess dispersant in conventional amount. In blend 6. component A1 was prepared in the way described in GB-A-2226028.
i TABLE II CONCENTRATIONS IN WT PERCENTAGE IN IS046 HYDRAULIC FLUID BASE 01 Blend 7 8 9 10 Component Al Component A2 Component B Detergent C (C2) Corrosion Inhib.F Corrosion Inhib.G Corrosion Inhib.D 0.05 0.05 0.07 0.07 0.07 0.07 0.19 0.19 0.19 0.19 0.04 - - 0.02 0.04 (Cl) 0.04 (Cl) 0.04 (Cl) 0.0075 0.04 - 0.03 - 0.05 0.025 Clarity of Blended Fluid Clear Cloudy Hazy Clear is IP135B Test Result Pass Pass Pass Pass FZG Load Stage Fail 11 Pass/ 11 Pass/ 11 Pass/ 11 Pass/ 12 Fail 12 Pail 12 Fail 12 Fail components Al, A2, B, D and F were as in Table I. Detergent Cl was an overbased calcium sulphurised nonylphenate. Detergent C2 was calcium dinonyl naphthalene sulphonate Corrosion Inhibitor G was butanedioic acid, sulpho-1,4- tridecyl ester. sodium salt.
Blends 7. 8 and 9 contained the same levels of conventional antioxidant, copper deactivator, VI improver and demulse aid. Blend 10 similar to blends 7 to 9 but contained a boronated polybutenyl succinimide ashless dispersant in conventional amount and no VI improver.
1 EXAMPLE 2
A blend 11 was prepared having the same composition as blend 6 described in Example 1 except that the base oil was rape seed oil. The results in the FZG test. the IP135B test, and the clarity.of the blend were the same as those obtained with blend 6.
EXAMPLE 3
A blend 12 was prepared having the same composition as blend 6 described in Example 1 except that component A1 was used at a concentration of 0.11 weight percent, and component A2 was composed entirely of the sulphurised fatty ester (Sulperm 1OS). Blend 12 produced the same FZG, IP135B, and clarity results as blend 6. In performance testing, blend 12 met the requirements of the Haglunds-Denison HFO specification, the Cincinnati Milacron P68, P69 and P70 specifications, and the Vickers vane pump specification.
EXAMPLE 4
A blend 13 was prepared by blending the additive components of blend 12 described in Example 3 in the same concentrations as blend 12 with rape seed oil. Blend 13 gave the same FZG, IP135B, and clarity results as blend 11 described in Example 2. In further testing blend 13 was found to satisfy the pump test requirements of the Haglunds-Denison HFO specification, as well as the Cincinnati Milacron thermal stability test procedure In this latter test procedure, a copper rod and an iron rod are kept in contact with each other under the surface of
200 milliliters of test oil in a beaker for 7 days at a constant temperature of 1350C. On completion of the test it was found that passing ratings were achieved relative to sludge formation, iron rod performance and weight change of the copper rod.
i
Claims (25)
1. A lubricant composition comprising (a) a metal-free anti-wear or loadcarrying additive containing sulphur and/or phosphorus and (b) a corrosion inhibitor in 5 the form of an amino succinate ester of formula R3R4C-COOR1 1 R6R7N-CR5-k;VUK2 in which R1 and R2 are each alkyl of 1 to 30 carbon atoms, R3, R4 and R5 are each hydrogen or alkyl of 1 to 4 carbon atoms, and R6 and R7 are each hydrogen, alkyl of 1 to 30 carbon atoms, or an acyl group derived from a saturated or unsaturated carboxylic acid of up to 30 carbon atoms, at least one of R6 and R7 being a said acyl group.
2. A lubricant composition according to claim 1 in which, in the said amino succinate ester, R1 and R2 are each alkyl of 3 to 6 carbon atoms, R3, R4 and R5 are each hydrogen, and R6 and R7 are each alkyl of 15 to 20 carbon atoms or an acyl radical derived from a saturated or unsaturated dicarboxylic acid containing 4 to 10 carbon atoms.
3. A lubricant composition according to claim 1 wherein the corrosion inhibitor is aspartic acid, N-(3carboxy-l-oxo-2-propenyl)-N-octadecylbis(2-methylpropyl) ester.
4. A lubricant composition according to any one of claims 1 to 3 wherein the metal-free anti-wear or loadcarrying additive is a mono- and/or dihydrocarbyl phosphate or phosphite wherein the hydrocarbyl radical is alkyl of up to 12 carbon atoms or an amine salt of such a phosphite or phosphate or a mixture thereof.
5. A lubricant composition according to any one of claims 1 to 3 wherein the metal-free anti-wear or loadcarrying additive is a mono- or dihydrocarbyl thiophosphate wherein the hydrocarbyl radical is aryl, alkylaryl, arylalkyl, or alkyl, or an'amine salt thereof.
6. A lubricant composition according to claim 5 wherein the said thiophosphate is diphenylthiophosphate, dinonylphenyl thiophosphate, di-nbutyl thiophosphate, di-isobutyl thiophosphate, di-2-ethylhexyl thiophosphate or a mixture thereof.
7. A lubricant composition according to any one of claims 1 to 3 wherein the metal free anti-wear or load-carrying additive is a tri-hydrocarbyl dithiophosphate in which each hydrocarbyl group is an aromatic, alkylaromatic or aliphatic radical.
8. A lubricant composition according to any one of claims 1 to 3 wherein the anti-wear or load-carrying additive comprises an amine salt of a phosphorothioic acid of formula:
(R0)2PSO_.KCR1R2R3 in which the radicals R are the same or different and each is a substituted or unsubstituted hydrocarbyl radical of up to 20 carbon atoms and R,, R2 and R3 are each hydrogen or a substituted or unsubstituted hydrocarbyl radical of up to 22 carbon atoms, not more than 2 of R,, R2 and R3 being hydrogen.
9. A lubricant composition according to claim 8 wherein R is alkyl of 3 to 8 carbon atms or phenyl and each of R,, R2 and R3 is hydrogen or an alkyl, cycloalkyl Z - is - or alkenyl radical of 4 to 22 carbon atoms each, not more than two of %, R2 and R3 being hydrogen.
10. A lubricant composition according to any one of claims 1 to 3 wherein the anti-wear or load-carrying additive comprises a combination of (i) at least one metal free anti-wear or load-carrying additive containing phosphorus and (ii) at least one metal-free anti-wear or load-carrying additive containing sulphur.
11. A lubricant composition according to any one of claims 1 to 3 wherein the anti-wear or load-carrying additive comprises a combination of (i) an amine salt of a phosphorothioic acid of formula:
(R0)2PSO-HCR1R2R3 in which the radicals R are the same or different and each is a substituted or unsubstituted hydrocarbyl radical of up to 20 carbon atoms and R,, R2 and R3 are each hydrogen or a substituted or unsubstituted hydrocarbyl radical of up to 22 carbon atoms, not more than two of R,, R2 and R3 being hydrogen; and (ii) a sulphurised fatty acid ester.
12. A lubricant composition according any one of claims 1 to 3 wherein the anti-wear or load-carrying additive comprises a combination of (i) an amine salt of a phosphorothioic acid of formula:
(R0)2PSO-RN+R1R2R3 in which the radicals R are phenyl, R, and R2 are hydrogen and R3 is mixed C12-C14 tertiary alkyl; (ii) a sulphurized fatty acid ester and (iii) a dialkyl polysulfide.
13. A lubricant composition according to any one of the preceding claims wherein the lubricant base stock is paraffinic lubricating oil base stock of mineral origin, synthetic polyalphaolefin. a synthetic lubricant ester or 5 an oil of biological origin.
14. A lubricant composition according to claim 13 in which the base stock is a biodegradable vegetable oil.
15. A lubricant composition according to claim 14 in which the vegetable oil is a rape seed oil.
16. A lubricant composition according to any one of the preceding claims which contains also an alkaline earth metal alkylbenzene sulphonate, alkaline earth metal alkylnaphthalene sulphonate, alkaline earth metal petroleum sulphonate. alkaline earth metal alkylphenate, alkaline earth metal alkyl sulphurized phenate or alkaline earth metal alkylsalicylate.
17. A lubricant composition according to claim 16 in which the proportion of the said alkaline earth metal salt is in the range 0.005 to 0.50 based on the total weight of the lubricant composition.
18. A lubricant composition according to any one of the preceding claims containing 0.05 to 3% by weight of the said anti-wear or load-carrying additive and from 0.002 to 0.5% by weight of the said corrosion inhibitor.
19. A lubricant composition according to claim 18 containing 0.1 to 1.5% by weight of the anti-wear or load-carrying additive and from 0.05 to 0.25% by weight of the corrosion inhibitor.
S
20. A lubricant composition according to any one of the preceding claims containing in addition one or more additional corrosion inhibitors, ashless dispersants, antioxidants. copper deactivators, demulsifying agents, viscosity index improvers, pour-point depressants, and/or anti-foam agents.
21. A lubricant composition according to claim 1 and substantially as hereinbefore described in any one of Examples 1 to 4.
22. A lubricant composition according to any one of claims 1 to 21 for use as a hydraulic fluid.
23. An additive concentrate comprising (a) at least one metal-free antiwear or load-carrying additive containing sulphur and/or phosphorus and (b) a corrosion inhibitor in the form of an amino succinate ester of formula R3R4C-COOR1 1 X6R7N-CR5-COOR2 in which each of R, and R2 is alkyl of 1 to 30 carbon atoms; each of R3, R4 and R5 is selected from hydrogen and alkyl of 1 to 4 carbon atoms; and each of R6 and R7 is selected from hydrogen, alkyl of 1 to 30 carbon atoms, and 25 an acyl group derived from a saturated or unsaturated carboxylic acid of up to 30 carbon atoms, at least one of R6 and R7 being a said acyl group.
24. An additive concentrate according to claim 23 wherein the anti-wear or load-carrying additive is as 30 defined in any one of claims 4 to 12.
1
25. An additive concentrate according to claim 23 or 24 wherein the corrosion inhibitor is aspartic acid, N-(3-carboxy-l-oxo-2-propenyl)-Noctadecyl-bis(2iaethylpropyl) ester.
Published 1991 at Ite Patent Office. State House. 66171 High Holborn. UndonWC1R41P. Further copies nay be obtained frorn Sales Branch. Unit 6. Nine Mile Point Cwmfehnfach. Cross Keys. N NPI 7HZ. Printed by Multiplex techniques lid. St Mary Cray. Kent.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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GB898929096A GB8929096D0 (en) | 1989-12-22 | 1989-12-22 | Metal free lubricants |
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GB9027874D0 GB9027874D0 (en) | 1991-02-13 |
GB2239257A true GB2239257A (en) | 1991-06-26 |
GB2239257B GB2239257B (en) | 1994-01-19 |
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GB9027874A Expired - Lifetime GB2239257B (en) | 1989-12-22 | 1990-12-21 | Transition metal free lubricants |
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GB898929096A Pending GB8929096D0 (en) | 1989-12-22 | 1989-12-22 | Metal free lubricants |
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EP (1) | EP0434464B1 (en) |
JP (1) | JP2965710B2 (en) |
CA (1) | CA2032940C (en) |
DE (1) | DE69016976T2 (en) |
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US5328619A (en) * | 1991-06-21 | 1994-07-12 | Ethyl Petroleum Additives, Inc. | Oil additive concentrates and lubricants of enhanced performance capabilities |
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US5275749A (en) * | 1992-11-06 | 1994-01-04 | King Industries, Inc. | N-acyl-N-hydrocarbonoxyalkyl aspartic acid esters as corrosion inhibitors |
US5658864A (en) * | 1995-03-24 | 1997-08-19 | Ethyl Corporation | Biodegradable pour point depressants for industrial fluids derived from biodegradable base oils |
GB2301113A (en) * | 1995-05-22 | 1996-11-27 | Ethyl Petroleum Additives Ltd | Extreme pressure gear lubricant |
US5582760A (en) * | 1995-12-22 | 1996-12-10 | Exxon Research And Engineering Company | High load-carrying turbo oils containing amine phosphate and alkylthiosuccinic acid |
US5679627A (en) * | 1995-12-22 | 1997-10-21 | Exxon Research & Engineering Company | High-load carrying turbo oils containing amine phosphate and a sulfur containing carboxylic acid (law348) |
US5587355A (en) * | 1995-12-22 | 1996-12-24 | Exxon Research And Engineering Company | High load-carrying turbo oils containing amine phosphate and thiophene carboxylic acid derivatives |
US5750478A (en) * | 1995-12-22 | 1998-05-12 | Exxon Research And Engineering Company | High load-carrying turbo oils containing amine phosphate and sulfurized fatty acid |
US5585029A (en) | 1995-12-22 | 1996-12-17 | Exxon Research And Engineering Company | High load-carrying turbo oils containing amine phosphate and 2-alkylthio-1,3,4-thiadiazole-5-alkanoic acid |
US5801130A (en) * | 1995-12-22 | 1998-09-01 | Exxon Research And Engineering Company | High load-carrying turbo oils containing amine phosphate and dimercaptothiadiazole derivatives |
US5856280A (en) * | 1996-07-12 | 1999-01-05 | Exxon Research And Engineering Company | Sulfur-containing carboxylic acid derivatives to reduce deposit forming tendencies and improve antioxidancy of aviation turbine oils |
US5714441A (en) * | 1996-07-12 | 1998-02-03 | Exxon Research And Engineering Company | Additive combination to reduce deposit forming tendencies and improve antioxidancy of aviation turbine oils |
CA2225352C (en) * | 1998-01-30 | 2003-10-21 | Nam Fong Han | Vegetable derived petroleum jelly replacement |
GB9810869D0 (en) * | 1998-05-20 | 1998-07-22 | Ass Octel | Biodegradable corrosion inhibitors |
WO2000063325A1 (en) * | 1999-04-14 | 2000-10-26 | Shell Internationale Research Maatschappij B.V. | Hydraulic fluid |
FR2806094A1 (en) * | 2000-03-09 | 2001-09-14 | Ceca Sa | Multipurpose lubricant compounds containing phosphorous and sulfur compounds, useful in industrial lubricating formulations for lubrication of machinery and as metal working lubricants |
JP4608129B2 (en) * | 2001-05-11 | 2011-01-05 | 昭和シェル石油株式会社 | Lubricating oil composition |
CN1308292C (en) * | 2002-09-19 | 2007-04-04 | 西巴特殊化学品控股有限公司 | Succinic acid semi-amides as anti-corrosives agents |
JP2004217797A (en) * | 2003-01-15 | 2004-08-05 | Ethyl Japan Kk | Gear oil composition having long life and excellent thermal stability |
JP5426829B2 (en) * | 2007-02-07 | 2014-02-26 | 昭和シェル石油株式会社 | Lubricating oil composition for chattering, vibration and squealing of hydraulic cylinders |
JP5475981B2 (en) * | 2007-12-12 | 2014-04-16 | 昭和シェル石油株式会社 | Lubricating oil composition |
WO2009074664A1 (en) * | 2007-12-12 | 2009-06-18 | Shell Internationale Research Maatschappij B.V. | Lubricating oil composition |
JP5475984B2 (en) * | 2007-12-12 | 2014-04-16 | 昭和シェル石油株式会社 | Lubricating oil composition |
JP5184068B2 (en) * | 2007-12-13 | 2013-04-17 | Jx日鉱日石エネルギー株式会社 | Flame retardant hydraulic fluid composition |
JPWO2009139433A1 (en) * | 2008-05-14 | 2011-09-22 | 協和発酵ケミカル株式会社 | Oil additive and lubricating oil containing the same |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1542113A (en) * | 1976-06-11 | 1979-03-14 | Lubrizol Corp | Sulphurized unsaturated compounds and their use as lubricant additives |
US4116877A (en) * | 1977-07-08 | 1978-09-26 | Exxon Research & Engineering Co. | Elastomer compatible seal swell additive for automatic transmission fluids, power transmission fluids and hydraulic steering applications |
GB2115000B (en) * | 1982-02-17 | 1985-02-06 | Shell Int Research | Lubricating oils and hydraulic fluids |
EP0309481B1 (en) * | 1986-06-13 | 1994-03-16 | The Lubrizol Corporation | Phosphorus-containing lubricant and functional fluid compositions |
-
1989
- 1989-12-22 GB GB898929096A patent/GB8929096D0/en active Pending
-
1990
- 1990-12-21 CA CA002032940A patent/CA2032940C/en not_active Expired - Fee Related
- 1990-12-21 DE DE69016976T patent/DE69016976T2/en not_active Expired - Fee Related
- 1990-12-21 EP EP90314188A patent/EP0434464B1/en not_active Expired - Lifetime
- 1990-12-21 JP JP2412602A patent/JP2965710B2/en not_active Expired - Fee Related
- 1990-12-21 GB GB9027874A patent/GB2239257B/en not_active Expired - Lifetime
- 1990-12-21 ES ES90314188T patent/ES2067701T3/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
CA2032940C (en) | 2000-07-18 |
CA2032940A1 (en) | 1991-06-23 |
DE69016976D1 (en) | 1995-03-23 |
JP2965710B2 (en) | 1999-10-18 |
GB2239257B (en) | 1994-01-19 |
EP0434464B1 (en) | 1995-02-15 |
GB8929096D0 (en) | 1990-02-28 |
GB9027874D0 (en) | 1991-02-13 |
JPH04114097A (en) | 1992-04-15 |
ES2067701T3 (en) | 1995-04-01 |
EP0434464A1 (en) | 1991-06-26 |
DE69016976T2 (en) | 1995-06-22 |
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Legal Events
Date | Code | Title | Description |
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773B | Case decided by the comptroller ** specification amended (sect. 73(2)/1977) | ||
SP | Amendment (slips) printed |