US3882032A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synergistic mixture of adiamine and alkalimetalamide as an antioxidant composition and lubricants containing same
Assignee: BP PLC
•
Filing: 1972-01-05
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Granted: 1975-05-06
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Expires: 1992-01-05
Abstract
Abstract Antioxidant composition comprises a synergistic mixture of a diamine, e.g. N,N,N''-tris-(4-t-octylphenyl)-4-t-octyl-1,2phenylene diamine, di-DODPA, and an alkali metal derivative of the same or similar diamine. The composition is particularly suitable for use in synthetic ester lubricants.
Inventors
- 👤 Michael Gavin Bird
- 👤 Keith Aled Wyn Parry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:26
CPC Classifications
C; C10; C10M; C10M3/00; C09; C09K; C09K15/00; C09K15/04; C09K15/32; C09K15/326; C10M2207/00; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/30; C10M2207/302; C10M2207/34; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/064; C10M2215/066; C10M2217/00; C10M2217/02; C10M2217/04; C10N; C10N2030/00; C10N2030/08; C10N2040/00; C10N2040/12; C10N2040/13
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
10 words
AN ANTIOXIDANT COMPOSITION COMPRISING A. A DIAMINE OF THE FORMULA
Claim 2
Dependent Claim
10 words
AN ANTIOXIDANT COMPOSITION COMPRISING A. A DIAMINE OF THE FORMULA
Claim 3
Dependent Claim
48 words
An antioxidant composition according to claim 1, wherein n is 0 and the alkali metal amide is prepared by reacting an alkali metal with the amine of Formula II in the presence of an excess of said amine at a temperature in the range of 150* to 200*C.
Claim 4
Dependent Claim
42 words
An antioxidant composition according to claim 1 wherein n is 0 and said alkali metal amide is prepared by reacting an alkali metal hydride with an excess of the amine of Formula II at a temperature in the range 150* to 200*C.
Claim 5
Dependent Claim
11 words
An antioxidant composition according to claim 1 where n is 1.
Claim 6
Dependent Claim
22 words
A lubricating composition comprising a lubricating base oil and up to 10% by weight of an antioxidant composition according to claim 1.
Claim 7
Dependent Claim
26 words
A lubricating composition according to claim 5 wherein the diamine of Formula I is present in an amount in the range 0.01 to 6% by weight.
Claim 8
Dependent Claim
23 words
A lubricating composition according to claim 6 wherein the diamine is present in an amount in the range 2 to 4% by weight.
Claim 9
Dependent Claim
24 words
A lubricating composition according to claim 5 wherein the alkali metal amide is present in an amount in the range 0.01 to 0.5% weight.
Claim 10
Dependent Claim
25 words
A lubricating composition according to claim 8 wherein the alkali metal amide is present in an amount in the range 0.04 to 0.2% by weight.
Claim 11
Dependent Claim
23 words
A lubricating composition comprising a synthetic polyester base oil and up to 10% by weight Of an antioxidant composition according to claim 1.
Claim 12
Dependent Claim
12 words
An antioxidant according to claim 1, wherein the diamine is N,N,N''-tris-(4-t-octylphenyl)-4-t-octyl-1,2-phenylene diamine.
Claim 13
Dependent Claim
33 words
An antioxidant according to claim 2, wherein the amine of Formula II is 4,4''-di-t-butyl-diphenylamine; 4,4''-di-t-hexyl-diphenylamine; N (4-t-butylphenyl)- Alpha -naphthylamine; N (4-t-octylphenyl)- Alpha -naphthylamine; N (4-t-butylphenyl)- Beta -naphthylamine; N (4-t-octylphenyl) - -naphthylamine or 4,4''-di-t-octyl-diphenylamine.
Claim 14
Dependent Claim
16 words
An antioxidant composition according to claim 4, wherein the amine of Formula II is N,N,N''-tris-(4-t-octyl-1,2-phenylene diamine.
Claim 15
Dependent Claim
46 words
An antioxidant composition in accordance with claim 1, wherein the diamine of Formula I is a diamine obtained from a thermal conversion of an amine selected from the group consisting of 4,4''-di-t-butyl-diphenylamine; 4,4''-di-t-hexyl-diphenylamine; N(4-t-butylphenyl)- Alpha -naphthylamine; N(4-t-octylphenyl)-Alpha -naphthylamine; N(4-t-butylphenyl)- Beta -naphthylamine; N(4-t-octylphenyl)- Beta -naphthylamine and 4,4''-di-t-octyl-diphenylamine.
References Cited (Backward Citations)
US3247111A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |