US4178260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ester based metal working lubricants
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1977-07-12
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Granted: 1979-12-11
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Expires: 1997-07-12
Abstract
Abstract The invention relates to lubricants for use in metal shaping operations, especially hot and cold rolling of steel and aluminium, and casting of aluminium. Preferred lubricants comprise in a mixture (i) a tetraester of pentaerythritol and a C16 to C20 aliphatic monocarboxylic acid, (ii) orthophosphoric acid. The lubricants have markedly reduced coefficients of friction; improved roll-wear characteristics and good stability at temperatures of 250+ DEG C. Incorporation of mineral oil and an emulsifier enables the thus modified composition to be used for the preparation of aqueous emulsions or dispersions.
Inventors
- 👤 Brian A. Cook
- 👤 Thomas W. Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:35
CPC Classifications
C; C10; C10M; C10M173/00; C10M105/00; C10M105/08; C10M105/32; C10M105/38; C10M2201/00; C10M2201/02; C10M2201/085; C10M2203/00; C10M2203/10; C10M2203/1006; C10M2203/102; C10M2203/1025; C10M2203/104; C10M2203/1045; C10M2203/106; C10M2203/1065; C10M2203/108; C10M2203/1085; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/126; C10M2207/129; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/2835; C10M2207/286; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2219/00; C10M2219/04; C10M2219/044; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10N; C10N2040/00; C10N2040/20; C10N2040/24; C10N2040/241; C10N2040/242; C10N2040/243; C10N2040/244; C10N2040/245; C10N2040/246; C10N2040/247; C10N2050/00; C10N2050/01
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
88 words
A lubricating oil composition comprising a mixture of (i) at least one pentaerythritol tetraester of at least one C 16 to C 20 aliphatic open-chain monocarboxylic acid, and (ii) at least one oil-compatible phosphorus compound selected from the group consisting of phosphoric acids, phosphorous acids, and alkyl acid phosphates in which the, or each, alkyl radical contains 1 to 4 carbon atoms; said compound or compounds (ii) being present in total amount of from 0.01 to 0.5 wt.% (calculated as phosphorus) based on the total weight of (i).
Claim 2
Dependent Claim
88 words
A lubricating oil composition comprising a mixture of (i) at least one pentaerythritol tetraester of at least one C 16 to C 20 aliphatic open-chain monocarboxylic acid, and (ii) at least one oil-compatible phosphorus compound selected from the group consisting of phosphoric acids, phosphorous acids, and alkyl acid phosphates in which the, or each, alkyl radical contains 1 to 4 carbon atoms; said compound or compounds (ii) being present in total amount of from 0.01 to 0.5 wt.% (calculated as phosphorus) based on the total weight of (i).
Claim 3
Dependent Claim
22 words
A composition as claimed in claim 1, wherein the said pentaerythritol tetraester is of a C 16 to C 18 said acid.
Claim 4
Dependent Claim
14 words
A composition as claimed in claim 1, wherein the pentaerythritol tetraester is pentaerythritol tetraoleate.
Claim 5
Dependent Claim
21 words
A composition as claimed in claim 1, wherein the said constituent (ii) is selected from phosphoric acids and said alkyl phosphates.
Claim 6
Dependent Claim
13 words
A composition as claimed in claim 4, wherein constituent (ii) is orthophosphoric acid.
Claim 7
Dependent Claim
25 words
A composition as claimed in claim 1, wherein the said total amount of constituent (ii) present is from 0.02 to 0.2 wt.% (calculated as phosphorus).
Claim 8
Dependent Claim
21 words
A water-emulsifiable lubricating oil composition comprising the composition as defined in claim 1, a conventional emulsifier and a conventional mineral oil.
Claim 9
Dependent Claim
31 words
A composition as claimed in claim 7, wherein said mineral oil has a viscosity of from 20 to 120 CST at 100° F. and a V.I. of from 40 to 120.
Claim 10
Dependent Claim
26 words
A composition as claimed in claim 8, further containing up to 10 wt. % of oleic acid and up to 6 wt. % of an alkanolamine.
References Cited (Backward Citations)
US3026262A
Cited
GB904964A
Cited
US3236774A
Cited
US3567636A
Cited
US3496104A
Cited
GB1180389A
Cited
GB1186180A
Cited
US3459663A
Cited
GB1162317A
Cited
US3526596A
Cited
GB1296991A
Cited
GB1256999A
Cited
US3701730A
Cited
US3723314A
Cited
GB1411654A
Cited
US3860521A
Cited
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 |