US4152342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oleophilic amidopolyethylenepolyamines
Assignee: Dow Chemical Co
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Filing: 1977-04-11
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Granted: 1979-05-01
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Expires: 1997-04-11
Abstract
Abstract Novel polyamines are disclosed which consist essentially of linear chains of the formula ##STR1## WHEREIN R is H or the acyl group of a fatty acid or an alkylsulfonic acid and n is a number about 6-22. Of the n units in the chain, in about 0 to 50% R is an acyl group of about 20-150 carbon atoms, in about 5-75% R is an acyl group of about 1-18 carbon atoms and in about 10-90% R is H. The compounds are made by appropriate partial acylation of the corresponding polyethylenepolyamine or by (a) polymerizing a 2-alkyl-2-oxazoline and then partially hydrolyzing and reacylating the polymer thus obtained. They are useful as surfactants, especially as detergents in lubricating oils.
Inventors
- 👤 Jacqueline S. Kelyman
- 👤 George A. Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:14
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/02; C08G73/0206
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
The method of making a linear polymer comprising the steps of: (a) polymerizing an oxazoline of the formula ##STR5## thus producing a linear N-acylated polyethylenimine whose backbone consists essentially of about 8-22 repeating units of the formula ##STR6## wherein R is H or alkyl of 1-17 carbon atoms; (b) partially hydrolyzing the N-acylated polyethylenimine, thereby to replace about 10-95 percent of the acyl groups with H; and (c) partially acylating the product of Step (b), using an organic acid to introduce 0-50 percent acyl groups of about 20-150 carbon atoms thus to produce the polymer.
Claim 2
Independent Claim
95 words
The method of making a linear polymer comprising the steps of: (a) polymerizing an oxazoline of the formula ##STR5## thus producing a linear N-acylated polyethylenimine whose backbone consists essentially of about 8-22 repeating units of the formula ##STR6## wherein R is H or alkyl of 1-17 carbon atoms; (b) partially hydrolyzing the N-acylated polyethylenimine, thereby to replace about 10-95 percent of the acyl groups with H; and (c) partially acylating the product of Step (b), using an organic acid to introduce 0-50 percent acyl groups of about 20-150 carbon atoms thus to produce the polymer.
References Cited (Backward Citations)
US2291396A
Cited
US3444170A
Cited
US3169980A
Cited
US3298955A
Cited
US3347789A
Cited
US3448048A
Cited
US3857791A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-30 | 1982-10-30 | 1983-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-30 | 1986-10-30 | 1987-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-30 | 1990-10-30 | 1991-05-01 | $7700.00 | Window Closed / Lapsed |