US3876722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymer of c' 3 'to c' 8 'alpha-olefin and c' 22 'to c' 40 'alpha-olefin
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1971-07-30
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Granted: 1975-04-08
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Expires: 1991-07-30
Abstract
Abstract Hydrocarbon polymers comprising linear C.sub.18.sub.+ alkyl side chains are added to residual fuels to improve their pour point and flow characteristics. These polymers are prepared by polymerizing C.sub.20 -C.sub.40 alpha-olefins in the presence of a Ziegler-type catalyst to a number average molecular weight within the range between about 500 and 125,000. Particularly effective polymers are prepared from C.sub.3 -C.sub.18 alphaolefins and C.sub.20 -C.sub.40 alpha-olefins.
Inventors
- 👤 Albert Rossi
- 👤 Norman Jacobson
- 👤 Harold N Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:19
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/26; C07C2/30; C08; C08F; C08F210/00; C08F210/04; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/16; C10L1/1625; C10L1/1633; C07C2531/00; C07C2531/02; C07C2531/12; C08F210/06; C08F210/08; C08F210/14; C10L1/1641; C10L1/165; C10L1/1666
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
118 words
AN OIL SOLUBLE COPOLYMER HAVING A NUMBER AVERAGE MOLECULAR WEIGHT OF ABOUT 1,000 TO 40,000 CONSISTING ESSENTIALLY OF ABOUT 20 TO 40 WEIGHT PERCENT OF A C4-C6 ALPHA-OLEFIN OF THE FORMULA H2C=CHR'' WHEREIN R'' IS A STRAIGHT CHAIN ALKYL GROUP AND 60 TO 80 WEIGHT PERCENT OF A C22-C30 ALPHA-OLEFIN OF THE FORMULA H2C=CHR WHEREIN R IS A STRIGHT CHAIN ALKYL GROUP, WHEREIN SAID COPOLYMER IS PREPARED BY COPOLYMERIZING SAID OLEFINS AT A TEMPERATURE IN THE RANGE OF ABOUT 50* TO 180*C. USING A ZIEGLER CATALYST COMPRISING A 0.01 TO 2 MOLAR PROPORTION OF A COMPOUND OF A GROUP IV TO VI METAL PER A MOLAR PROPORTION OF AN ORGANOMETALLIC COMPOUND OF A GROUP I TO III METAL.
Claim 2
Dependent Claim
118 words
AN OIL SOLUBLE COPOLYMER HAVING A NUMBER AVERAGE MOLECULAR WEIGHT OF ABOUT 1,000 TO 40,000 CONSISTING ESSENTIALLY OF ABOUT 20 TO 40 WEIGHT PERCENT OF A C4-C6 ALPHA-OLEFIN OF THE FORMULA H2C=CHR'' WHEREIN R'' IS A STRAIGHT CHAIN ALKYL GROUP AND 60 TO 80 WEIGHT PERCENT OF A C22-C30 ALPHA-OLEFIN OF THE FORMULA H2C=CHR WHEREIN R IS A STRIGHT CHAIN ALKYL GROUP, WHEREIN SAID COPOLYMER IS PREPARED BY COPOLYMERIZING SAID OLEFINS AT A TEMPERATURE IN THE RANGE OF ABOUT 50* TO 180*C. USING A ZIEGLER CATALYST COMPRISING A 0.01 TO 2 MOLAR PROPORTION OF A COMPOUND OF A GROUP IV TO VI METAL PER A MOLAR PROPORTION OF AN ORGANOMETALLIC COMPOUND OF A GROUP I TO III METAL.
Claim 3
Dependent Claim
16 words
A copolymer according to claim 1 wherein said copolymer is a copolymer of docosene-1 and butene-1.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |