US4877541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion inhibitor
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1987-12-11
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Granted: 1989-10-31
•
Expires: 2007-12-11
Abstract
Abstract A corrosion inhibitor for use in synthetic ester lubricating oils is disclosed which comprises an effective amount of: 1. at least one aromatic amide; and 2. at least one hydroxy substituted aromatic compound. The corrosion inhibitor thus formed is particularly useful in synthetic ester turbo lubricating oils.
Inventors
- 👤 Max J. Wisotsky
- 👤 Stephen J. Metro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:31
CPC Classifications
C; C10; C10M; C10M169/00; C10M169/04; C10M105/00; C10M105/08; C10M105/32; C10M129/00; C10M129/02; C10M129/68; C10M129/76; C10M133/00; C10M133/02; C10M133/04; C10M133/12; C10M133/14; C10M133/16; C10M135/00; C10M135/12; C10M141/00; C10M141/06; C10M141/08; C10M2207/00; C10M2207/28; C10M2207/2805; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/284; C10M2207/285; C10M2207/286; C10M2207/287; C10M2207/288; C10M2207/289; C10M2207/34; C10M2207/345; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/062; C10M2215/064; C10M2215/065; C10M2215/066; C10M2215/067; C10M2215/068; C10M2215/08; C10M2215/082; C10M2215/086; C10M2215/12; C10M2215/122; C10M2215/24; C10M2215/28; C10M2219/00; C10M2219/06; C10M2219/10; C10M2219/104; C10M2219/108; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/043; C10N; C10N2040/00; C10N2040/135
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
114 words
A corrosion inhibitor for metal surfaces comprising: I. A compound having the formula: ##STR7## wherein R 1 is an amide, substituted amide or an ester; at least one substituent of R 2 , R 3 , R 4 , R 5 and R 6 is an amide, substituted amide, amine or substituted amine; and the remaining substituents are independently hydrodgen, hydroxyl or alkyl; and II A compound having the formula ##STR8## wherein at least one substituent of R 7 -R 11 is an alkanoyl radical having the structure ##STR9## where R12 is alkyl, X is O, N or S; and the remaining R 7 -R 11 substituents are hydrogen, alkyl, hydroxy, or ether functionality.
Claim 2
Dependent Claim
114 words
A corrosion inhibitor for metal surfaces comprising: I. A compound having the formula: ##STR7## wherein R 1 is an amide, substituted amide or an ester; at least one substituent of R 2 , R 3 , R 4 , R 5 and R 6 is an amide, substituted amide, amine or substituted amine; and the remaining substituents are independently hydrodgen, hydroxyl or alkyl; and II A compound having the formula ##STR8## wherein at least one substituent of R 7 -R 11 is an alkanoyl radical having the structure ##STR9## where R12 is alkyl, X is O, N or S; and the remaining R 7 -R 11 substituents are hydrogen, alkyl, hydroxy, or ether functionality.
Claim 3
Dependent Claim
35 words
The composition of claim 1 wherein R 1 in compound I is an amide, a mono- or di- substituted amide or mixtures thereof, R 2 is an amine and R 3 -R 6 are hydrogen.
Claim 4
Dependent Claim
12 words
The composition of claim 2 wherein X in compound II is oxygen.
Claim 5
Dependent Claim
19 words
The composition of claim 3 wherein at least one of R 7 -R 11 in compound II is hydroxy.
Claim 6
Dependent Claim
19 words
The composition of claim 4 wherein at least two of R 7 -R 11 in compound II are hydroxy.
Claim 7
Dependent Claim
16 words
The composition of claim 5 wherein R 7 and R 8 in compound II are hydroxy.
Claim 8
Dependent Claim
27 words
The composition of claim 6 wherein compound II has the formula: ##STR10## wherein R 13 is an alkyl group having between 1 and about 10 carbon atoms.
Claim 9
Dependent Claim
11 words
The composition of claim 7 wherein compound II comprises propyl gallate.
Claim 10
Dependent Claim
10 words
The composition of claim 8 wherein compound I comprises anthranilamide.
Claim 11
Dependent Claim
11 words
The composition of claim 1 wherein said metal surface comprises copper.
Claim 12
Dependent Claim
135 words
A synthetic ester lubricating oil composition which comprises: (a) a major amount of synthetic ester basestock; (b) a minor amount of the following compounds: I. At least one compound having the formula ##STR11## wherein R 1 is an amide, substituted amide, or an ester; at least one substituent of R 2 , R 3 , R 4 , R 5 and R 6 is an amide, substituted amide, amine or substituted amine; and the remaining substituents are independently hydrogen, hydroxyl or alkyl; and, II. At least one compound having the formula ##STR12## wherein at least one substituent of R 7 -R 11 is an alkanoyl radical having the structure ##STR13## where R12 is alkyl, X is O, N or S; and the remaining R 7 -R 11 substituents are hydrogen, alkyl, hydroxy, or ether functionality.
Claim 13
Dependent Claim
135 words
A synthetic ester lubricating oil composition which comprises: (a) a major amount of synthetic ester basestock; (b) a minor amount of the following compounds: I. At least one compound having the formula ##STR11## wherein R 1 is an amide, substituted amide, or an ester; at least one substituent of R 2 , R 3 , R 4 , R 5 and R 6 is an amide, substituted amide, amine or substituted amine; and the remaining substituents are independently hydrogen, hydroxyl or alkyl; and, II. At least one compound having the formula ##STR12## wherein at least one substituent of R 7 -R 11 is an alkanoyl radical having the structure ##STR13## where R12 is alkyl, X is O, N or S; and the remaining R 7 -R 11 substituents are hydrogen, alkyl, hydroxy, or ether functionality.
Claim 14
Dependent Claim
35 words
The composition of claim 11 wherein R 1 in compound I is an amide, a mono- or di- substituted amide or mixtures thereof, R 2 is an amine and R 3 -R 6 are hydrogen.
Claim 15
Dependent Claim
27 words
The composition of claim 12 wherein compound II has the formula ##STR14## wherein R 13 is an alkyl group having between 1 and about 10 carbon atoms.
Claim 16
Dependent Claim
22 words
The composition of claim 13 wherein the concentration of compound I ranges between about 0.02 and about 0.5 wt.% of the basestock.
Claim 17
Dependent Claim
22 words
The composition of claim 14 wherein the concentration of compound II ranges between about 0.01 and about 0.3 wt.% of the basestock.
Claim 18
Dependent Claim
11 words
The composition of claim 15 wherein the compound I comprises anthranilamide.
Claim 19
Dependent Claim
12 words
The composition of claim 16 wherein the compound II comprises propyl gallate.
Claim 20
Independent Claim
130 words
A method for improving the metal corrosion inhibition of a synthetic ester lubricating oil which comprises adding the following compounds to said oil I. A compound having the formula: ##STR15## wherein R 1 is an amide, substituted amide or an ester; at least one substituent of R 2 , R 3 , R 4 , R 5 and R 6 is an amide, substituted amide, amine or substituted amine; and the remaining substituents are independently hydrogen, hydroxyl or alkyl; and II. A compound having the formula ##STR16## wherein at least one substituent of R 7 -R 11 is an alkanoyl radical having the structure ##STR17## where R12 is alkyl, X is O, N or S; and the remaining R 7 -R 11 substituents are hydrogen, alkyl, hydroxy, or ether functionality.
Claim 21
Independent Claim
130 words
A method for improving the metal corrosion inhibition of a synthetic ester lubricating oil which comprises adding the following compounds to said oil I. A compound having the formula: ##STR15## wherein R 1 is an amide, substituted amide or an ester; at least one substituent of R 2 , R 3 , R 4 , R 5 and R 6 is an amide, substituted amide, amine or substituted amine; and the remaining substituents are independently hydrogen, hydroxyl or alkyl; and II. A compound having the formula ##STR16## wherein at least one substituent of R 7 -R 11 is an alkanoyl radical having the structure ##STR17## where R12 is alkyl, X is O, N or S; and the remaining R 7 -R 11 substituents are hydrogen, alkyl, hydroxy, or ether functionality.
Claim 22
Dependent Claim
35 words
The method of claim 18 wherein R 1 in compound I is an amide, a mono- or di- substituted amide or mixtures thereof, R 2 is an amine and R 3 -R 6 are hydrogen.
Claim 23
Dependent Claim
27 words
The method of claim 19 wherein compound II has the formula ##STR18## wherein R 13 is an alkyl group having between 1 and about 10 carbon atoms.
Claim 24
Dependent Claim
22 words
The method of claim 20 wherein the concentration of compound I ranges between about 0.02 and about 0.5 wt.% of the basestock.
Claim 25
Dependent Claim
22 words
The method of claim 21 wherein the concentration of compound II ranges between about 0.01 and about 0.3 wt.% of the basestock.
Claim 26
Dependent Claim
10 words
The method of claim 22 wherein compound I comprises anthranilamide.
Claim 27
Dependent Claim
11 words
The method of claim 23 wherein compound II comprises propyl gallate.
Claim 28
Dependent Claim
14 words
The method of claim 18 wherein said lubricating oil is a turbo lubricating oil.
Claim 29
Dependent Claim
16 words
The method of claim 25 wherein said oil also contains at least one phosphate amine salt.
Claim 30
Dependent Claim
15 words
The composition of claim 11 wherein at least one phosphate amine salt is present therein.
Claim 31
Dependent Claim
15 words
The composition of claim 17 wherein at least one phosphate amine salt is present therein.
Claim 32
Dependent Claim
16 words
The method of claim 18 wherein said oil also contains at least one phosphate amine salt.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-30 | 1993-05-01 | 1993-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-30 | 1997-05-01 | 1997-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-30 | 2001-05-01 | 2001-10-31 | $7700.00 | Window Closed / Lapsed |