Patent US4031016A successfully refreshed from Google Patents.
US4031016A
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Base oil compositions having improved light stability
Assignee: Shell USA Inc
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Filing: 1975-12-15
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Granted: 1977-06-21
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Expires: 1995-12-15
Abstract
Abstract The daylight stability of hydroprocessed oils is improved by adding thereto (1) singlet oxygen quenchers suitably selected from the class consisting of carotenes, aliphatic amines and heterocyclic amines, and (2) certain aromatic secondary amines as antioxidants.
Inventors
- 👤 Hans Berger
- 👤 Gerhard De Lind Van Wijngaarden
- 👤 Jacobus H. Breuker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:08
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2203/00; C10M2203/02; C10M2203/022; C10M2203/024; C10M2203/04; C10M2205/00; C10M2205/17; C10M2205/173; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2215/06; C10M2215/066; C10M2215/22; C10M2215/221; C10M2215/223; C10M2215/224; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/26; C10M2215/30
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
108 words
A base oil composition comprising a major portion of a hydroprocessed base oil and a daylight stability enhancing amount of 1. a compound of the general formula: ##STR3## wherein R 1 is a substituted or unsubstituted aliphatic, aromatic or a four to eight member heterocyclic group comprised of from one to five hetero-atoms selected from the class of nitrogen, oxygen, phosphorus and sulfur; R 2 is hydrogen or the same group as R 1 , and each R 3 , which may be the same or different, is selected from the class consisting of hydrogen and an alkyl group of from one to six carbon atoms; and 2.
Claim 2
Dependent Claim
108 words
A base oil composition comprising a major portion of a hydroprocessed base oil and a daylight stability enhancing amount of 1. a compound of the general formula: ##STR3## wherein R 1 is a substituted or unsubstituted aliphatic, aromatic or a four to eight member heterocyclic group comprised of from one to five hetero-atoms selected from the class of nitrogen, oxygen, phosphorus and sulfur; R 2 is hydrogen or the same group as R 1 , and each R 3 , which may be the same or different, is selected from the class consisting of hydrogen and an alkyl group of from one to six carbon atoms; and 2.
Claim 3
Dependent Claim
25 words
a singlet oxygen quencher. 2. The composition of claim 1 wherein R 1 is an alkyl group comprised of from one to twenty carbon atoms.
Claim 4
Dependent Claim
13 words
The composition of claim 2 wherein R 1 is a secondary alkyl group.
Claim 5
Dependent Claim
16 words
The composition of claim 3 wherein R 2 is the same group as R 1 .
Claim 6
Dependent Claim
10 words
The composition of claim 4 wherein R 3 is hydrogen.
Claim 7
Dependent Claim
42 words
The composition of claim 1 wherein the amount of the compound of general formula I is from 0.0001 to 0.05% weight and the amount of singlet oxygen quencher is from 0.0001 to 0.5% weight based on the weight of hydroprocessed base oil.
Claim 8
Dependent Claim
14 words
The composition of claim 1 wherein the compound of general formula I is N,N'-di-secondarybutyl-p-phenylene-diamine.
Claim 9
Dependent Claim
67 words
The composition of claim 1 wherein the singlet oxygen quencher is selected from the class consisting of carotenes, aliphatic amines, and substituted or unsubstituted heterocyclic amines in which the heterocyclic ring contains from four to eight atoms and is comprised of at least one and up to four nitrogen hetero-atoms and from zero to three other hetero-atoms selected from the class consisting of oxygen, sulfur and phosphorus.
Claim 10
Dependent Claim
12 words
The composition of claim 8 wherein the singlet oxygen quencher is beta-carotene.
Claim 11
Dependent Claim
32 words
The composition of claim 8 wherein the singlet oxygen quencher is an aliphatic tertiary amine, wherein each alkyl radical of the tertiary amine is comprised of from one to twenty carbon atoms.
Claim 12
Dependent Claim
25 words
The composition of claim 8 wherein the singlet oxygen quencher is an aliphatic primary amine and the aliphatic group contains a tertiary alpha carbon atom.
Claim 13
Dependent Claim
24 words
The composition of claim 11 wherein the singlet oxygen quencher is a tertiary alkyl primary amine comprised of from four to twenty-five carbon atoms.
Claim 14
Dependent Claim
27 words
The composition of claim 8 wherein the singlet oxygen quencher is a secondary aliphatic amine and 1-2 of the aliphatic groups contain a tertiary alpha carbon atom.
Claim 15
Dependent Claim
28 words
The composition of claim 8 wherein the singlet oxygen quencher is an alkyl heterocyclic amine wherein the alkyl substituent is comprised of from one to twenty carbon atoms.
Claim 16
Dependent Claim
12 words
The composition of claim 8 wherein the singlet oxygen quencher is 1,4-diaza-[2,2,2]-bicyclooctane.
Claim 17
Dependent Claim
26 words
The composition of claim 1 wherein the hydroprocessed base oil is selected from a class consisting of hydrocracked base oils and hydrocracked and hydrofinished base oils.
Claim 18
Dependent Claim
22 words
The composition of claim 1 wherein the hydroprocessed base oil has a viscosity index in the range of from 80 to 155.
Claim 19
Dependent Claim
14 words
The composition of claim 1 wherein the hydroprocessed base oil is a lubricating oil.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-20 | 1980-12-20 | 1981-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-20 | 1984-12-20 | 1985-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-20 | 1988-12-20 | 1989-06-21 | $7700.00 | Window Closed / Lapsed |