US4764567A
Expired / Lapsed
US
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Process for the preparation of polyoxyalkylene block polyethers having enhanced properties
Assignee: BASF Corp
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Filing: 1986-11-20
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Granted: 1988-08-16
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Expires: 2006-11-20
Abstract
Abstract Polyoxyalkylene block polyether polyols having enhanced physical properties are prepared by catalyzing the ethylene oxide addition with cesium hydroxide or mixtures of cesium hydroxide with other basic catalysts. These polyethers are especially useful in surface active applications.
Inventors
- 👤 Roger A. Ott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:13
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2642; C08G65/2645; C08G65/2648
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
40 words
A process for the preparation of polyoxyalkylene block polyethers containing one or more polyoxyethylene moieties and one or more polyoxy(higher alkylene) moieties, comprising catalyzing at least the formation of said polyoxyethylene moiety from ethylene oxide with a basic cesium-containing catalyst.
Claim 2
Dependent Claim
40 words
A process for the preparation of polyoxyalkylene block polyethers containing one or more polyoxyethylene moieties and one or more polyoxy(higher alkylene) moieties, comprising catalyzing at least the formation of said polyoxyethylene moiety from ethylene oxide with a basic cesium-containing catalyst.
Claim 3
Dependent Claim
13 words
The process of claim 1 wherein said basic cesium-containing catalyst comprises cesium hydroxide.
Claim 4
Dependent Claim
29 words
The process of claim 2 wherein said polyoxy(higher alkylene) moiety is derived from oxyalkylation with an alkylene oxide selected from the group consisting of propylene oxide and butylene oxide.
Claim 5
Dependent Claim
24 words
The process of claim 2 wherein said polyoxy(higher alkylene) moiety is derived from a cyclic ether from the group consisting of oxetane and tetrahydrofuran.
Claim 6
Dependent Claim
23 words
The process of claim 2 wherein said cesium hydroxide-containing catalyst comprises cesium hydroxide and potassium hydroxide in a molar ratio greater than 1:3.
Claim 7
Dependent Claim
23 words
The process of claim 3 wherein said cesium hydroxide-containing catalyst comprises cesium hydroxide and potassium hydroxide in a molar ratio greater than 1:3.
Claim 8
Dependent Claim
23 words
The process of claim 4 wherein said cesium hydroxide-containing catalyst comprises cesium hydroxide and potassium hydroxide in a molar ratio greater than 1:3.
Claim 9
Dependent Claim
15 words
The process of claim 2 wherein said cesium hydroxide-containing catalyst consists essentially of cesium hydroxide.
Claim 10
Dependent Claim
15 words
The process of claim 3 wherein said cesium hydroxide-containing catalyst consists essentially of cesium hydroxide.
Claim 11
Dependent Claim
15 words
The process of claim 4 wherein said cesium hydroxide-containing catalyst consists essentially of cesium hydroxide.
Claim 12
Dependent Claim
37 words
The process of claim 1 wherein said cesium-containing catalyst comprises a basic cesium compound selected from the group consisting of cesium oxide, cesium carbonate, cesium acetate, and the cesium alkoxides of C 1 -C 8 lower alkanols.
Claim 13
Dependent Claim
25 words
The process of claim 11 wherein both ethylene oxide addition and higher alkylene oxide addition is catalyzed by said catalyst containing a basic cesium compound.
Claim 14
Dependent Claim
44 words
A process for the preparation of polyoxyalkylene block polyethers containing one or more polyoxyethylene moieties and one or more polyoxy(higher alkylene) moieties by sequential oxyalkylation with ethylene oxide and one or more higher alkylene oxides, comprising catalyzing all oxyalkylations with a cesium hydroxide-containing catalyst.
Claim 15
Dependent Claim
44 words
A process for the preparation of polyoxyalkylene block polyethers containing one or more polyoxyethylene moieties and one or more polyoxy(higher alkylene) moieties by sequential oxyalkylation with ethylene oxide and one or more higher alkylene oxides, comprising catalyzing all oxyalkylations with a cesium hydroxide-containing catalyst.
Claim 16
Dependent Claim
29 words
The process of claim 13 wherein said polyoxy(higher alkylene) moiety is derived from oxyalkylation with an alkylene oxide selected from the group consisting of propylene oxide and butylene oxide.
Claim 17
Dependent Claim
23 words
The process of claim 13 wherein said cesium hydroxide-containing catalyst comprises cesium hydroxide and potassium hydroxide in a molar ratio greater than 1:3.
Claim 18
Dependent Claim
23 words
The process of claim 14 wherein said cesium hydroxide-containing catalyst comprises cesium hydroxide and potassium hydroxide in a molar ratio greater than 1:3.
Claim 19
Dependent Claim
15 words
The process of claim 13 wherein said cesium hydroxide-containing catalyst consists essentially of cesium hydroxide.
Claim 20
Dependent Claim
23 words
The process of claim 3 wherein said cesium hydroxide-containing catalyst contains cesium hydroxide and sodium hydroxide in a molar ratio greater than 1:3.
Claim 21
Dependent Claim
23 words
The process of claim 13 wherein said cesium hydroxide-containing catalyst contains cesium hydroxide and sodium hydroxide in a molar ratio greater than 1:3.
References Cited (Backward Citations)
US3393243A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-16 | 1992-02-15 | 1992-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-16 | 1996-02-15 | 1996-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-16 | 2000-02-15 | 2000-08-16 | $7700.00 | Window Closed / Lapsed |