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US5652329A
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Polyurethane foam-supported double metal cyanide catalysts for polyether polyol synthesis
Assignee: Lyondell Chemical Technology LP
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Filing: 1996-09-13
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Granted: 1997-07-29
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Expires: 2016-09-13
Abstract
Abstract The polymerization of epoxides such as propylene oxide to polyether polyols is conducted in the presence of a polyurethane foam-supported double metal cyanide (DMC) catalyst comprising a DMC catalyst such as zinc hexacyanocobaltate which can contain a slight excess of a metal halide salt to attain crystallinity, and a polyurethane foam support.
Inventors
- 👤 Bi Le-Khac
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:53
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/24; B01J27/26; B01J31/00; B01J31/02; B01J31/06; B01J31/068; B01J23/00; B01J23/70; B01J23/76; B01J23/80; B01J31/16; B01J31/22; C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/4829; C08G65/00; C08G65/02; C08G65/04; C08G65/06; C08G65/08; C08G65/10; C08G65/26; C08G65/2642; C08G65/2645; C08G65/2663; C08G65/2693; B01J2531/00; B01J2531/20; B01J2531/26; B01J31/40; B01J31/4015; B01J31/4023; B01J31/403; C08G2110/00; C08G2110/0008; C08G2110/0083; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
63 words
A process for making an epoxide polymer, said process comprising polymerizing an epoxide in the presence of a polyurethane foam-supported double metal cyanide (DMC) catalyst, wherein the foam-supported DMC catalyst comprises: (a) a DMC catalyst; and (b) a polyurethane foam support; wherein the DMC catalyst contains a slight excess of a metal halide salt and is substantially crystalline by powder X-ray diffraction analysis.
Claim 2
Dependent Claim
63 words
A process for making an epoxide polymer, said process comprising polymerizing an epoxide in the presence of a polyurethane foam-supported double metal cyanide (DMC) catalyst, wherein the foam-supported DMC catalyst comprises: (a) a DMC catalyst; and (b) a polyurethane foam support; wherein the DMC catalyst contains a slight excess of a metal halide salt and is substantially crystalline by powder X-ray diffraction analysis.
Claim 3
Dependent Claim
24 words
The process of claim 1 wherein the epoxide is selected from the group consisting of ethylene oxide, propylene oxide, butylene oxide, and mixtures thereof.
Claim 4
Dependent Claim
13 words
The process of claim 1 wherein the DMC catalyst is a zinc hexacyanocobaltate.
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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) | 2000-07-28 | 2001-01-27 | 2001-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-07-28 | 2005-01-27 | 2005-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-07-28 | 2009-01-27 | 2009-07-29 | $7700.00 | Window Closed / Lapsed |