US4440902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bisesters of alkenylsuccinic acids and ethylene oxide/propylene oxide block polymers and their use
Assignee: Hoechst AG
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Filing: 1982-09-09
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Granted: 1984-04-03
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Expires: 2002-09-09
Abstract
Abstract New bisesters of alkenylsuccinic acids and ethylene oxide/propylene oxide block polymers, which are obtained by reaction of alkenylsuccinic anhydride of the Formula 1 ##STR1## wherein R denotes branched or unbranched C 2 -C 20 alkyl, with an ethylene oxide/propylene oxide block polymer of the Formula 2 ##STR2## wherein R denotes methyl or ethyl, n and m are numbers selected such that the polyethylene oxide contribution to the total molecule is 5 to 80% of the molecular weight and p is a number from 10 to 70, and their use as demulsifiers for oil-water emulsions, as corrosion-protective agents and as dispersants for dyestuffs.
Inventors
- 👤 Helmut Diery
- 👤 Bernhard Mees
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:07
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/32; C08G65/329; C08G65/331; C08G65/332; B; B01; B01D; B01D17/00; B01D17/02; B01D17/04; B01D17/047; C09; C09B; C09B67/00; C09B67/0071; C09B67/0084; C09B67/0085; C09B67/0089; C10; C10G; C10G33/00; C10G33/04; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/173; D; D06; D06P; D06P1/00; D06P1/44; D06P1/60; D06P1/613; D06P1/6138
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
89 words
A bisester of alkenylsuccinic acid and an ethylene oxide/propylene oxide block polymer, obtained by reaction of alkenylsuccinic anhydride of the Formula 1 ##STR5## wherein R denotes branched or unbranched C 2 -C 20 alkyl, with an ethylene oxide/propylene oxide block polymer of the Formula 2 ##STR6## wherein R denotes methyl or ethyl, n and m are numbers selected such that the polyethylene oxide contribution to the total molecule of the block polymer is 5 to 80% of the molecular weight and p is a number from 10 to 70.
Claim 2
Dependent Claim
89 words
A bisester of alkenylsuccinic acid and an ethylene oxide/propylene oxide block polymer, obtained by reaction of alkenylsuccinic anhydride of the Formula 1 ##STR5## wherein R denotes branched or unbranched C 2 -C 20 alkyl, with an ethylene oxide/propylene oxide block polymer of the Formula 2 ##STR6## wherein R denotes methyl or ethyl, n and m are numbers selected such that the polyethylene oxide contribution to the total molecule of the block polymer is 5 to 80% of the molecular weight and p is a number from 10 to 70.
Claim 3
Dependent Claim
27 words
The use of the bisester as claimed in claim 1 as a demulsifier for oil-water emulsions, as a corrosion protective agent and as a dispersant for dyestuffs.
References Cited (Backward Citations)
US3213054A
Cited
DE2540173A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-03 | 1987-10-03 | 1988-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-03 | 1991-10-03 | 1992-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-03 | 1995-10-03 | 1996-04-03 | $7700.00 | Window Closed / Lapsed |