US3923919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethylene-propylene copolymer oil
Assignee: Sun Ventures Inc
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Filing: 1974-03-19
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Granted: 1975-12-02
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Expires: 1994-03-19
Abstract
Abstract New ethylene-propylene copolymer oils containing 29-71 mol percent ethylene, the rest being at least substantially entirely propylene, said oils being of rich viscosity index, low pour point, and high stability, are produced from monoolefin mixtures containing ethylene and propylene employing specified vanadiumaluminum or titanium-aluminum Ziegler-type catalyst systems. Hydrogen under pressure is used with the vanadium-aluminum catalyst system to control molecular weight. Oils of lubricating oil viscosity can be produced directly, or after cracking higher molecular weight oil, said cracking usually, but not necessarily, followed by hydrogenating. Dewaxing can be employed to reduce pour point.
Inventors
- 👤 Richard S Stearns
- 👤 Irl N Duling
- 👤 David S Gates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:03
CPC Classifications
C; C10; C10M; C10M107/00; C10M107/02; C10M107/04; C07; C07C; C07C2527/00; C07C2527/06; C07C2527/133; C07C2531/00; C07C2531/02; C07C2531/12; C07C2531/14; C07C2531/26; C07C2531/36; C10M2205/00; C10N; C10N2020/00; C10N2020/01; C10N2040/00; C10N2040/14; C10N2040/16; C10N2040/17; C10N2040/30; C10N2040/32; C10N2040/34; C10N2040/36; C10N2040/38; C10N2040/40; C10N2040/42; C10N2040/44; C10N2040/50
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
77 words
AN ETHHYLENE-PROPYLENE COPOLYMER OIL HAVING A KV210 IN THE RANGE OF 2-10 CS., A MINIMUM ASTM D-2270 VISCOSITY INDEX OF 110, A MAXIMUM POUR POINT OF 0*F., AN ULTRAVOILET ABSOPTIVITY NO GREATER THAN 0.2 AT 197 MILLIMICRONS AND WHICH CONTAINS IN THE RANGE OF 40-71 MOLE PERCENT ETHYLENE AS DETERMINED BY INFRARED ANALYSIS, SAID OIL HAVING A MAXIMUM DECREASE IN KV100 OF 25% WHEN SUBJECTED TO THE THERMAL STABILITY TEST SET FORTH IN MILITARY SPECIFICATION MIL-H-27601A (USAF).
Claim 2
Dependent Claim
77 words
AN ETHHYLENE-PROPYLENE COPOLYMER OIL HAVING A KV210 IN THE RANGE OF 2-10 CS., A MINIMUM ASTM D-2270 VISCOSITY INDEX OF 110, A MAXIMUM POUR POINT OF 0*F., AN ULTRAVOILET ABSOPTIVITY NO GREATER THAN 0.2 AT 197 MILLIMICRONS AND WHICH CONTAINS IN THE RANGE OF 40-71 MOLE PERCENT ETHYLENE AS DETERMINED BY INFRARED ANALYSIS, SAID OIL HAVING A MAXIMUM DECREASE IN KV100 OF 25% WHEN SUBJECTED TO THE THERMAL STABILITY TEST SET FORTH IN MILITARY SPECIFICATION MIL-H-27601A (USAF).
Claim 3
Dependent Claim
43 words
An ethylene-propylene copolymer oil according to claim 1 wherein said ultraviolet absorptivity is in the range of 0.00-0.175 and said ASTM D-2270 viscosity index is in the range of 125 to 175, said pour point is in the range of 0 to -65.
Claim 4
Dependent Claim
40 words
An ethylene-propylene copolymer oil according to claim 1 and having a maximum decrease in KV210 of 5% when subjected to sonic shear test in accordance with the Herein Modified ASTM Proposed Method of Test for Shear Stability of Polymer-Containing Oils.
Claim 5
Dependent Claim
17 words
The copolymer oil of claim 1 containing 40-60 mol percent ethylene, the rest being substantially entirely propylene.
Claim 6
Dependent Claim
16 words
The copolymer oil of claim 1 containing 40-50 mol percent ethylene, the rest being entirely propylene.
Claim 7
Dependent Claim
19 words
The composition of claim 5 wherein said pour point is below -40*F and said viscosity index is above 115.
Claim 8
Dependent Claim
16 words
The composition of claim 1 wherein side chains attached to the copolymer backbone are predominantly atactic.
Claim 9
Dependent Claim
32 words
The composition of claim 1 wherein said oil has a KV210 of at least 3.56 and is a distillate fraction of an oil which has a % ethylene of at least 45.5.
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) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |