EP0086513A2
Expired / Lapsed
EP
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Lubricating oil composition
Assignee: Shell Internationale Research Maatschappij BV
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Filing: 1983-01-25
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Granted: —
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Expires: 2003-01-25
Abstract
Abstract Lubricating oil composition comprising a major proportion of a lubricating oil and minor proportions of a Group II metal dithiophosphate and an aminosuccinic acid or a derivative thereof with the formula: in which R 1 , R 2 , R 3 , R 4 , R 5 , R 6 and R 7 each represent a hydrogen atom or a hydrocarbyl radical containing 1-30 carbon atoms, and in which R 3 and/or R 4 may also represent an acylderivative of said hydrocarbyl radical. The lubricating oil composition can be used as a hydraulic fluid.
Inventors
- 👤 Peter Henry Dudley Matthews
- 👤 Derek Willis Morecraft
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-10 01:16
CPC Classifications
C; C10; C10M; C10M141/00; C10M141/10; C10M133/00; C10M133/02; C10M133/04; C10M133/06; C10M133/16; C10M137/00; C10M137/02; C10M137/04; C10M137/10; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/08; C10M2215/082; C10M2215/086; C10M2215/12; C10M2215/122; C10M2215/24; C10M2215/26; C10M2215/28; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10N; C10N2010/00; C10N2010/04; C10N2040/00; C10N2040/08
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
83 words
Lubricating oil composition comprising a major proportion of a lubricating oil and minor proportions of a Group II metal dithiophosphate and an aminosuccinic acid or a derivative thereof with the formula: in which R 1 , R 2 , R 3 , R 4 , R 5 , R 6 and R 7 each represent a hydrogen atom or a hydrocarbyl radical containing 1-30 carbon atoms, and in which R 3 and/or R 4 may also represent an acylderivative of said hydrocarbyl radical.
Claim 2
Dependent Claim
83 words
Lubricating oil composition comprising a major proportion of a lubricating oil and minor proportions of a Group II metal dithiophosphate and an aminosuccinic acid or a derivative thereof with the formula: in which R 1 , R 2 , R 3 , R 4 , R 5 , R 6 and R 7 each represent a hydrogen atom or a hydrocarbyl radical containing 1-30 carbon atoms, and in which R 3 and/or R 4 may also represent an acylderivative of said hydrocarbyl radical.
Claim 3
Dependent Claim
37 words
Lubricating oil composition as claimed in claim 1 in which R 1 and R 5 represent the same or different straight-chain or branched-chain hydrocarbyl radicals containing 1-20 carbon atoms, preferably saturated hydrocarbyl radicals containing 3-6 carbon atoms.
Claim 4
Dependent Claim
37 words
Lubricating oil composition as claimed in claim 1 or 2 in which R , either R 3 or R 4 , R 6 and R 7 represent the same or different straight-chain or branched-chain saturated hydrocarbyl radicals.
Claim 5
Dependent Claim
73 words
LUbricating oil composition as claimed in any of claims 1-3 in which a derivative of an aminosuccinic acid is used in which R 1 and R 5 represent the same or different alkyl groups containing 3-6 carbon atoms, R 2 represents a hydrogen atom, R 3 and/or R 4 represent an alkyl group containing 15-20 carbon atoms or an acyl group derived from a saturated or unsaturated carboxylic acid having 2-10 carbon atoms.
Claim 6
Dependent Claim
56 words
Lubricating oil composition as claimed in claim 4 in which a dialkylester of aminosuccinic acid is used in which R 1 and R 5 represent isobutyl groups, R 2 represents a hydrogen atom, R 3 represents an octadecyl group, R 4 represents a 3-carboxy-1-oxo-2-propenyl group and R 6 and R 7 both represent a hydrogen atom.
Claim 7
Dependent Claim
48 words
Lubricating oil composition as claimed in any one of claims 1-5 which comprises from 0.1-5%w. of a Group II metal dithiophosphate and from 0.01-5%w. of a dialkylester of aminosuccinic acid, preferably from 0.1-1.5%w. of a Group II metal dithiophosphate and from 0.01-1.5%w of a dialkylester of aminosuccinic acid.
Claim 8
Dependent Claim
41 words
Lubricating oil composition as claimed in any one of claims 1-6 in which the Group II metal dithiophosphate is a Group II metal dialkyl dithiophosphate of which the metal is selected from the group consisting of Zn, Mg, Ca and Ba.
Claim 9
Dependent Claim
29 words
Lubricating oil composition as claimed in claim 7 in which the Group II metal dithiophosphate is a zinc dialkyl dithiophosphate of which the alkyl groups contain 3-20 carbon atans.
Claim 10
Dependent Claim
25 words
Lubricating oil composition as claimed in any one of claims 1-8 in which the lubricating oil has a kinematic viscosity of from 5-220cSt at 40°C.
Claim 11
Dependent Claim
17 words
Lubricating oil composition as claimed in claim 1, substantially as hereinbefore described with reference to the Examples.
Claim 12
Dependent Claim
18 words
Use of a lubricating oil composition as claimed in any one of claims 1-10 as a hydraulic fluid.
Claim 13
Dependent Claim
20 words
Lubricating oil concentrate containing a Group II metal dithiophosphate and an aminosuccinic acid or a derivative thereof as defined hereinbefore.
Claim 14
Dependent Claim
20 words
Lubricating oil concentrate containing a Group II metal dithiophosphate and an aminosuccinic acid or a derivative thereof as defined hereinbefore.
References Cited (Backward Citations)
No citation records indexed.
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