US5254272A
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US
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Lubricant compositions with metal-free antiwear or load-carrying additives and amino succinate esters
Assignee: Afton Chemical Ltd
•
Filing: 1992-11-02
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Granted: 1993-10-19
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Expires: 2012-11-02
Abstract
Abstract Lubricant compositions especially useful as hydraulic fluids contain a metal-free anti-wear or load-carrying additive containing sulphur and/or phosphorus and an amino succinate ester as corrosion inhibitor. Such compositions are free from heavy metal and have improved environmental acceptability where heavy metals are to be avoided, e.g. in agriculture. The lubricant base stock may be a biodegradable natural oil.
Inventors
- 👤 David K. Walters
- 👤 Arthur S. Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 00:58
CPC Classifications
C; C10; C10M; C10M141/00; C10M141/08; C10M141/10; C10M163/00; C10M2205/00; C10M2205/20; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/024; C10M2207/026; C10M2207/028; C10M2207/26; C10M2207/262; C10M2207/28; C10M2207/287; C10M2207/40; C10M2207/404; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/10; C10M2209/103; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/06; C10M2215/064; C10M2215/065; C10M2215/08; C10M2215/082; C10M2215/086; C10M2215/12; C10M2215/122; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/26; C10M2215/28; C10M2215/30; C10M2217/00; C10M2217/02; C10M2217/028; C10M2217/04; C10M2217/046; C10M2217/06; C10M2219/00; C10M2219/02; C10M2219/022; C10M2219/024; C10M2219/04; C10M2219/044; C10M2219/046; C10M2219/08; C10M2219/082; C10M2219/083; C10M2219/087; C10M2219/088; C10M2219/089; C10M2219/10; C10M2219/102; C10M2219/104; C10M2219/106; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2223/043; C10M2223/045; C10M2223/047; C10M2223/049; C10M2223/10; C10M2227/00; C10M2227/06; C10M2227/061; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10N; C10N2040/00; C10N2040/02; C10N2040/06; C10N2040/08; C10N2040/30; C10N2040/32; C10N2040/34; C10N2040/36; C10N2040/38; C10N2040/40; C10N2040/42; C10N2040/44; C10N2040/50; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
135 words
A metal free lubricant composition comprising a major amount of oil of lubricating viscosity and minor amounts of (a) a metal-free anti-wear or load-carrying additive containing sulphur and/or phosphorus and (b) a corrosion inhibitor int he form of an amino succinate ester of formula ##STR2## in which each of R 1 and R 2 is alkyl of 1 to 30 carbon atoms; each of R 3 , R 4 and R 5 is selected from hydrogen and alkyl of 1 to 4 carbon atoms; and each of R 6 and R 7 is selected from hydrogen, alkyl of 1 to 30 carbon atoms, and an acyl group derived form a saturated or unsaturated carboxylic acid of up to 30 carbon atoms, at least one of R 6 and R 7 being a said acyl group.
Claim 2
Dependent Claim
135 words
A metal free lubricant composition comprising a major amount of oil of lubricating viscosity and minor amounts of (a) a metal-free anti-wear or load-carrying additive containing sulphur and/or phosphorus and (b) a corrosion inhibitor int he form of an amino succinate ester of formula ##STR2## in which each of R 1 and R 2 is alkyl of 1 to 30 carbon atoms; each of R 3 , R 4 and R 5 is selected from hydrogen and alkyl of 1 to 4 carbon atoms; and each of R 6 and R 7 is selected from hydrogen, alkyl of 1 to 30 carbon atoms, and an acyl group derived form a saturated or unsaturated carboxylic acid of up to 30 carbon atoms, at least one of R 6 and R 7 being a said acyl group.
Claim 3
Dependent Claim
76 words
A lubricant composition according to claim 1 in which, in the said amino succinate ester, R 1 and R 2 are each alkyl of 3 to 6 carbon atoms; R 3 , R 4 and R 5 are each hydrogen; and each of R 6 and R 7 is selected from alkyl of 15 to 20 carbon atoms and an acyl radical derived from a saturated or unsaturated dicarboxylic acid containing 4 to 10 carbon atoms.
Claim 4
Dependent Claim
16 words
A lubricant composition according to claim 1 wherein the corrosion inhibitor is aspartic acid, N-(3-carboxy-1-oxo-2-propenyl)-N-octadecyl-bis(2-methylpropyl) ester.
Claim 5
Dependent Claim
48 words
A lubricant composition according to claim 1 wherein the metal-free anti-wear or load-carrying additive is a mono- and/or di-hydrocarbyl 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.
Claim 6
Dependent Claim
35 words
A lubricant composition according to claim 1 wherein the metal-free anti-wear or load-carrying additive is a mono- or di-hydrocarbyl thiophosphate wherein the hydrocarbyl radical is aryl, alkylaryl, arylalkyl, or alkyl, or an amine salt thereof.
Claim 7
Dependent Claim
49 words
A lubricant composition according to claim 5 wherein the metal-free anti-wear or load-carrying additive is at least one monothiophosphate selected from the group consisting of (i) diphenylthiophosphate, (ii) dinonylphenyl thiophosphate, (iii) di-n-butyl thiophosphate, (iv) diisobutyl thiophosphate, (v) di-2-ethylhexyl thiophosphate, and (vi) an amine slat of any of the foregoing.
Claim 8
Dependent Claim
31 words
A lubricant composition according to claim 1 wherein the metal-free anti-wear or load-carrying additive is a tri-hydrocarbyl dithiophosphate in which each hydrocarbyl group is an aromatic, alkylaromatic, cycloaliphatic, or aliphatic radical.
Claim 9
Dependent Claim
96 words
A lubricant composition according to claim 1 wherein the anti-wear or load-carrying additive is an amine salt of a phosphorothioic acid of formula: (RO).sub.2 PSO.sup.- ·HN.sup.+ R.sub.1 R.sub.2 R.sub.3 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 1 , R 2 , and R 3 are each hydrogen or a substituted or unsubstituted hydrocarbyl radical of up to 22 carbon atoms, not more than 2 of R 1 , R 2 , and R 3 being hydrogen.
Claim 10
Dependent Claim
62 words
A lubricant composition according to claim 8 wherein R is alkyl of 3 to 8 carbon atoms or phenyl and each of R 1 , R 2 , and R 3 is hydrogen or an alkyl, cycloalkyl or alkenyl radical of 4 to 22 carbon atoms each, not more than two of R 1 , R 2 and R 3 being hydrogen.
Claim 11
Dependent Claim
42 words
A lubricant composition according to claim 1 wherein the anti-wear or load-carrying additive is comprised of 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.
Claim 12
Dependent Claim
111 words
A lubricant composition according to claim 1 wherein the anti-wear or load-carrying additive is comprised of a combination of (i) an oil soluble amine salt of a phosphorothioic acid of formula: (RO).sub.2 PSO.sup.- ·HN.sup.+ R.sub.1 R.sub.2 R.sub.3 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 1 , R 2 , and R 3 are each hydrogen or a substituted or unsubstituted hydrocarbyl radical of up to 22 carbon atoms, not more than 2 of R 1 , R 2 , and R 3 being hydrogen; and (ii) a sulphurized fatty acid ester.
Claim 13
Dependent Claim
69 words
A lubricant composition according to claim 1 wherein the anti-wear or load-carrying additive is comprised of a combination of (i) an amine salt of a phosphorothioic acid of formula: (RO).sub.2 PSO.sup.- ·HN.sup.+ R.sub.1 R.sub.2 R.sub.3 in which the radicals R are phenyl, R 1 and R 2 are hydrogen and R 3 is mixed C 12 -C 14 tertiary alkyl; (ii) sulphurized fatty acid ester and (iii) dialkyl polysulfide.
Claim 14
Dependent Claim
16 words
A lubricant composition according to claim 8 wherein the corrosion inhibitor is aspartic acid, N-(3-carboxy-1-oxo-2-propenyl)-N-octadecyl-bis(2-methylpropyl) ester.
Claim 15
Dependent Claim
16 words
A lubricant composition according to claim 10 wherein the corrosion inhibitor is aspartic acid, N-(3-carboxy-1-oxo-2-propenyl)-N-octadecyl-bis(2-methylpropyl) ester.
Claim 16
Dependent Claim
16 words
A lubricant composition according to claim 11 wherein the corrosion inhibitor is aspartic acid, N-(3-carboxy-1-oxo-2-propenyl)-N-octadecyl-bis(2-methylpropyl) ester.
Claim 17
Dependent Claim
16 words
A lubricant composition according to claim 12 wherein the corrosion inhibitor is aspartic acid, N-(3-carboxy-1-oxo-2-propenyl)-N-octadecyl-bis(2-methylpropyl) ester.
Claim 18
Dependent Claim
36 words
A lubricant composition according to claim 1 wherein the oil of lubricating viscosity is a paraffinic lubricating oil base stock of mineral origin, a synthetic poly-alpha-olefin, a synthetic lubricant ester or an oil of biological origin.
Claim 19
Dependent Claim
16 words
A lubricant composition according to claim 17 in which the oil is a biodegradable vegetable oil.
Claim 20
Dependent Claim
17 words
A lubricant composition according to claim 18 in which the vegetable oil is a rape seed oil.
Claim 21
Dependent Claim
30 words
A lubricant composition according to claim 1 containing 0.1 to 1.5% by weight of the anti-wear or load-carrying additive nd from 0.05 to 0.25% by weight of the corrosion inhibitor.
Claim 22
Dependent Claim
25 words
A lubricant composition according to claim 1 which contains also an ashless dispersant made by reacting a polyolefin-maleic anhydride reaction product with a polyalkylene polyamine.
Claim 23
Dependent Claim
25 words
A lubricant composition according to claim 10 which contains also an ashless dispersant made by reacting a polyolefin-maleic anhydride reaction product with a polyalkylene polyamine.
Claim 24
Dependent Claim
25 words
A lubricant composition according to claim 12 which contains also an ashless dispersant made by reacting a polyolefin-maleic anhydride reaction product with a polyalkylene polyamine.
Claim 25
Dependent Claim
124 words
A metal-free additive concentrate comprising (a) at least one 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 ##STR3## in which each of R 1 and R 2 is alkyl of 1 to 30 carbon atoms; each of R 3 , R 4 and R 5 is selected from hydrogen and alkyl of 1 to 4 carbon atoms; and each of R 6 and R 7 is selected from hydrogen, alkyl of 1 to 30 carbon atoms, and an acyl group derived from a saturated or unsaturated carboxylic acid of up to 30 carbon atoms, at least one of R 6 and R 7 being a said acyl group.
Claim 26
Dependent Claim
124 words
A metal-free additive concentrate comprising (a) at least one 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 ##STR3## in which each of R 1 and R 2 is alkyl of 1 to 30 carbon atoms; each of R 3 , R 4 and R 5 is selected from hydrogen and alkyl of 1 to 4 carbon atoms; and each of R 6 and R 7 is selected from hydrogen, alkyl of 1 to 30 carbon atoms, and an acyl group derived from a saturated or unsaturated carboxylic acid of up to 30 carbon atoms, at least one of R 6 and R 7 being a said acyl group.
Claim 27
Dependent Claim
97 words
An additive concentrate according to claim 24 wherein the metal-free anti-wear or load-carrying additive comprises an amine salt of a phosphorothioic acid of formula: (RO).sub.2 PSO.sup.- ·HN.sup.+ R.sub.1 R.sub.2 R.sub.3 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 1 , R 2 , and R 3 are each hydrogen or a substituted or unsubstituted hydrocarbyl radical of up to 22 carbon atoms, not more than 2 of R 1 , R 2 , and R 3 being hydrogen.
Claim 28
Dependent Claim
110 words
An additive concentrate according to claim 24 wherein the metal-free anti-wear or load-carrying additive is comprised of a combination of (i) an amine salt of a phosphorothioic acid of formula: (RO).sub.2 PSO.sup.- ·HN.sup.+ R.sub.1 R.sub.2 R.sub.3 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 1 , R 2 , and R 3 are each hydrogen or a substituted or unsubstituted hydrocarbyl radical of up to 22 carbon atoms, not more than 2 of R 1 , R 2 , and R 3 being hydrogen; and (ii) a sulphurized fatty acid ester.
Claim 29
Dependent Claim
70 words
An additive concentrate according to claim 24 wherein the metal-free anti-wear or load-carrying additive is comprised of a combination of (i) an amine salt of a phosphorothioic acid of formula: (RO).sub.2 PSO.sup.- ·HN.sup.+ R.sub.1 R.sub.2 R.sub.3 in which the radicals R are phenyl, R 1 and R 2 are hydrogen and R 3 is mixed C 12 -C 14 tertiary alkyl; (ii) sulphurized fatty acid ester and (iii) dialkyl polysulfide.
Claim 30
Dependent Claim
16 words
An additive concentrate according to claim 25 wherein the corrosion inhibitor is aspartic acid, N-(3-carboxy-1-oxo-2-propenyl)-N-octadecyl-bis(2-methylpropyl) ester.
Claim 31
Dependent Claim
16 words
An additive concentrate according to claim 28 wherein the corrosion inhibitor is aspartic acid, N-(3-carboxy-1-oxo-2-propenyl)-N-octadecyl-bis(2-methylpropyl) ester.
Claim 32
Dependent Claim
76 words
An additive concentrate according to claim 24 in which, in the said amino succinate ester, R 1 and R 2 are each alkyl of 3 to 6 carbon atoms; R 3 , R 4 and R 5 are each hydrogen; and each of R 6 and R 7 is selected form alkyl of 15 to 20 carbon atoms and an acyl radical derived from a saturated or unsaturated dicarboxylic acid containing 4 to 10 carbon atoms.
Claim 33
Dependent Claim
35 words
An additive concentrate according to claim 24 wherein the metal-free anti-wear or load-carrying additive is a mono- or di-hydrocarbyl thiophosphate wherein the hydrocarbyl radical is aryl, alkylaryl, arylalkyl, or alkyl, or an amine salt thereof.
Claim 34
Dependent Claim
49 words
An additive concentrate according to claim 21 wherein the metal-free anti-wear or load-carrying additive is at least one monothiophosphate selected form the group consisting of (i) diphenylthiophosphate, (ii) dinonylphenyl thiophosphate, (iii) di-n-butyl thiophosphate, (iv) di-isobutyl thiophosphate, (v) di-2-ethylhexyl thiophosphate, and (vi) an amine salt of any of the foregoing.
Claim 35
Dependent Claim
32 words
An additive concentrate according to claim 24 wherein the metal-free anti-wear or load-carrying additive is a trihydrocarbyl dithiophosphate in which each hydrocarbyl group is an aromatic, alkylaromatic, cycloaliphatic, or a aliphatic radical.
Claim 36
Dependent Claim
42 words
An additive concentrate according to claim 24 wherein the anti-wear or load-carrying additive is comprised of 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.
Claim 37
Dependent Claim
16 words
An additive concentrate according to claim 24 wherein the corrosion inhibitor is aspartic acid, N-(3-carboxy-1-oxo-2-propenyl)-N-octadecyl-bis(2-methylpropyl) ester.
Claim 38
Dependent Claim
69 words
An additive concentrate according to claim 24 wherein the anti-wear or load-carrying additive is comprised of a combination of (i) an amine salt of a phosphorothioic acid of formula: (RO).sub.2 PSO.sup.- ·HN.sup.+ R.sub.1 R.sub.2 R.sub.3 in which the radicals R are phenyl, R 1 and R 2 are hydrogen and R 3 is mixed C 12 -C 14 tertiary alkyl; (ii) sulphurized fatty acid ester and (iii) dialkyl polysulfide.
Claim 39
Dependent Claim
185 words
An additive concentrate according to claim 24 wherein the metal-free anti-wear or load-carrying additive is comprised of a combination of (i) an oil-soluble amine salt of a phosphorothioic acid of formula: (RO).sub.2 PSO.sup.- ·HN.sup.+ R.sub.1 R.sub.2 R.sub.3 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 1 R 2 , and R 3 are each hydrogen or a substituted or unsubstituted hydrocarbyl radical of up to 22 carbon atoms, not more than 2 of R 1 , R 2 , and R 3 being hydrogen; (ii) an oil-soluble sulphurized fatty acid ester; and (iii) an oil-soluble dialkyl polysulfide; and wherein, in the said amino succinate easter, R 1 and R 2 are each alkyl of 3 to 6 carbon atoms; R 3 , R 4 and R 5 are each hydrogen; and each of R 6 an R 7 is selected form alkyl of 15 to 20 carbon atoms and an acyl radical derived form a saturated or unsaturated dicarboxylic acid containing 4 to 10 carbon atoms.
Claim 40
Dependent Claim
25 words
An additive concentrate according to claim 24 which contains also an ashless dispersant made by reacting a polyolefinmaleic anhydride reaction product with a polyalkylene polyamine.
Claim 41
Dependent Claim
25 words
An additive concentrate according to claim 34 which contains also an ashless dispersant made by reacting a polyolefinmaleic anhydride reaction product with a polyalkylene polyamine.
Claim 42
Dependent Claim
25 words
An additive concentrate according to claim 37 which contains also an ashless dispersant made by reacting a polyolefinmaleic anhydride reaction product with a polyalkylene polyamine.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1996-10-18 | 1997-04-19 | 1997-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-10-18 | 2001-04-19 | 2001-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-10-18 | 2005-04-19 | 2005-10-19 | $7700.00 | Window Closed / Lapsed |