US4178261A
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US
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Carboxylic acid esters and their use as a base lubricating oil
Assignee: Bayer AG
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Filing: 1978-03-22
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Granted: 1979-12-11
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Expires: 1998-03-22
Abstract
Abstract Carboxylic acid ester obtainable by reacting 6-cyclohexylhexanoic acid, optionally in combination with an aliphatic monocarboxylic acid which contains 4 to 20 C-atoms, completely or partially with a polyhydric alcohol, can be used as base lubricating oil.
Inventors
- 👤 Rolf Dhein
- 👤 Karl-Heinz Hentschel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:20
CPC Classifications
C; C10; C10M; C10M105/00; C10M105/08; C10M105/32; C10M105/38; C10M2207/00; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10N; C10N2040/00; C10N2040/25; C10N2040/251; C10N2040/255; C10N2040/28
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
112 words
A carboxylic acid ester preparable by completely or partially esterifying an acid component with a polyhydric alcohol component, said acid component comprising 6-cyclohexylhexanoic acid and up to 75 mol % based on the total acid component of an aliphatic monocarboxylic acid having 4 to 20 carbon atoms and said polyhydric alcohol having at least one member selected from the group consisting of glycerol, dipentaerythritol, a compound of the formula ##STR4## wherein R 1 and R 2 are the same or different and are hydrogen or alkyl having 1 to 5 carbon atoms and a compound of the formula ##STR5## wherein R 3 is alkyl having 1 to 6 carbon atoms or hydroxymethyl.
Claim 2
Dependent Claim
112 words
A carboxylic acid ester preparable by completely or partially esterifying an acid component with a polyhydric alcohol component, said acid component comprising 6-cyclohexylhexanoic acid and up to 75 mol % based on the total acid component of an aliphatic monocarboxylic acid having 4 to 20 carbon atoms and said polyhydric alcohol having at least one member selected from the group consisting of glycerol, dipentaerythritol, a compound of the formula ##STR4## wherein R 1 and R 2 are the same or different and are hydrogen or alkyl having 1 to 5 carbon atoms and a compound of the formula ##STR5## wherein R 3 is alkyl having 1 to 6 carbon atoms or hydroxymethyl.
Claim 3
Dependent Claim
14 words
The carboxylic acid ester of claim 1 wherein said acid component is completely esterified.
Claim 4
Dependent Claim
15 words
The carboxylic acid ester of claim 1 wherein the acid component consists of 6-cyclohexylhexanoic acid.
Claim 5
Dependent Claim
30 words
The carboxylic acid ester of claim 1 wherein said polyhydric alcohol component is of the formula ##STR6## wherein R 3 is alkyl having 1 to 6 carbon atoms or hydroxymethyl.
Claim 6
Dependent Claim
22 words
The carboxylic acid ester of claim 1 wherein 0.8 to 1.3 acid equivalents per equivalent of OH group are employed for esterification.
Claim 7
Dependent Claim
19 words
A base oil for the preparation of liquid or pasty lubricants comprising the carboxylic acid ester of claim 1.
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) | 1982-12-10 | 1983-06-11 | 1983-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-10 | 1987-06-11 | 1987-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-10 | 1991-06-11 | 1991-12-11 | $7700.00 | Window Closed / Lapsed |