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Patent US5536883A successfully refreshed from Google Patents.
US5536883A
Expired / Lapsed
US
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Highly active double metal cyanide catalysts and epoxide polymerization
Assignee: Lyondell Chemical Technology LP
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Filing: 1995-05-30
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Granted: 1996-07-16
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Expires: 2015-05-30
Abstract
Abstract Highly active double metal cyanide (DMC) catalysts are disclosed. The catalysts comprise a DMC complex, and organic complexing agent, and from about 5 to about 80 wt. %, based on the amount of catalyst, of a polyether having a number average molecular weight greater than about 500. A method of preparing the catalysts is also disclosed. The catalysts are easy to prepare, have exceptional activity, and are readily removed, if desired, from polymer products. The catalysts are used for polymerizing epoxides.
Inventors
- 👤 Bi Le-Khac
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:04
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/06; C08G65/08; C08G65/10; B; B01; B01J; B01J31/00; B01J31/16; B01J31/22; B01J31/2204; B01J31/2208; B01J31/2213; B01J27/00; B01J27/24; B01J27/26; B01J31/02; B01J31/0201; B01J31/0202; B01J31/06; B01J31/068; B01J31/165; C08G65/26; C08G65/2642; C08G65/2645; C08G65/2663; C08G65/30; B01J2531/00; B01J2531/02; B01J2531/0202; B01J2531/0205; B01J2531/80; B01J2531/84; B01J2531/845; B01J2531/90; B01J2531/96
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
65 words
A process for polymerizing an epoxide, said process comprising reacting an epoxide and a hydroxyl group-containing initiator in the presence of a catalyst which comprises: (a) a double metal cyanide compound; (b) an organic complexing agent; and (c) from about 5 to about 80 wt. %, based on the amount of catalyst, of a polyether having a number average molecular weight greater than about 500.
Claim 2
Dependent Claim
65 words
A process for polymerizing an epoxide, said process comprising reacting an epoxide and a hydroxyl group-containing initiator in the presence of a catalyst which comprises: (a) a double metal cyanide compound; (b) an organic complexing agent; and (c) from about 5 to about 80 wt. %, based on the amount of catalyst, of a polyether having a number average molecular weight greater than about 500.
Claim 3
Dependent Claim
15 words
The process of claim 1 wherein the double metal cyanide compound is a zinc hexacyanocobaltate.
Claim 4
Dependent Claim
13 words
The process of claim 1 wherein the organic complexing agent is tert-butyl alcohol.
Claim 5
Dependent Claim
27 words
The process of claim 1 wherein the polyether is a polyether polyol having a number average molecular weight within the range of about 1000 to about 10,000.
Claim 6
Dependent Claim
26 words
The process of claim 1 wherein the polyether is a poly(oxypropylene)diol having a number average molecular weight within the range of about 2000 to about 4000.
Claim 7
Dependent Claim
20 words
The process of claim 1 wherein the catalyst contains from about 10 to about 70 wt. % of the polyether.
Claim 8
Dependent Claim
20 words
The process of claim 1 wherein the catalyst contains from about 15 to about 60 wt. % of the polyether.
Claim 9
Dependent Claim
11 words
The process of claim 1 wherein the epoxide is propylene oxide.
Claim 10
Dependent Claim
62 words
A process for polymerizing an epoxide, said process comprising reacting an epoxide and a hydroxyl group-containing initiator in the presence of a catalyst which comprises: (a) a zinc hexacyanocobaltate compound; (b) tert-butyl alcohol; and (c) from about 5 to about 80 wt. %, based on the amount of catalyst, of a polyether having a number average molecular weight greater than about 500.
Claim 11
Dependent Claim
62 words
A process for polymerizing an epoxide, said process comprising reacting an epoxide and a hydroxyl group-containing initiator in the presence of a catalyst which comprises: (a) a zinc hexacyanocobaltate compound; (b) tert-butyl alcohol; and (c) from about 5 to about 80 wt. %, based on the amount of catalyst, of a polyether having a number average molecular weight greater than about 500.
Claim 12
Dependent Claim
27 words
The process of claim 9 wherein the polyether is a polyether polyol having a number average molecular weight within the range of about 1000 to about 10,000.
Claim 13
Dependent Claim
26 words
The process of claim 9 wherein the polyether is a poly(oxypropylene)diol having a number average molecular weight within the range of about 2000 to about 4000.
Claim 14
Dependent Claim
20 words
The process of claim 9 wherein the catalyst contains from about 10 to about 70 wt. % of the polyether.
Claim 15
Dependent Claim
20 words
The process of claim 9 wherein the catalyst contains from about 15 to about 60 wt. % of the polyether.
Claim 16
Dependent Claim
11 words
The process of claim 9 wherein the epoxide is propylene oxide.
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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) | 1999-07-16 | 2000-01-15 | 2000-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-07-16 | 2004-01-15 | 2004-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-07-16 | 2008-01-15 | 2008-07-16 | $7700.00 | Window Closed / Lapsed |