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US5789626A
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Highly active double metal cyanide catalysts
Assignee: Covestro NV
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Filing: 1997-01-08
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Granted: 1998-08-04
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Expires: 2017-01-08
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 less than about 500. The catalysts polymerize propylene oxide at a rate in excess of about 1 kg PO/g Co/min. at 100 ppm catalyst, based on the weight of finished polyether, at 105° C. The catalysts, which are easy to prepare, give polyether polyols with exceptionally low unsaturation levels.
Inventors
- 👤 Bi Le-Khac
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:28
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; C08G65/26; C08G65/2642; C08G65/2645; C08G65/2663; B01J2531/00; B01J2531/80; B01J2531/84; B01J2531/845
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
81 words
A process for making an epoxide polymer, said process comprising heating an epoxide in the presence of a catalyst, and optionally in the presence of a starter polyol, under conditions effective to polymerize the epoxide and produce the epoxide polymer, wherein the catalyst comprises a double metal cyanide compound, an 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 less than about 500.
Claim 2
Dependent Claim
81 words
A process for making an epoxide polymer, said process comprising heating an epoxide in the presence of a catalyst, and optionally in the presence of a starter polyol, under conditions effective to polymerize the epoxide and produce the epoxide polymer, wherein the catalyst comprises a double metal cyanide compound, an 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 less than about 500.
Claim 3
Dependent Claim
11 words
The process of claim 1 wherein the epoxide is propylene oxide.
Claim 4
Dependent Claim
15 words
The process of claim 1 wherein the double metal cyanide compound is a zinc hexacyanocobaltate.
Claim 5
Dependent Claim
33 words
The process of claim 1 wherein the organic complexing agent is a water-soluble aliphatic alcohol selected from the group consisting of ethanol, isopropyl alcohol, n-butyl alcohol, isobutyl alcohol, sec-butyl alcohol, and tert-butyl alcohol.
Claim 6
Dependent Claim
20 words
The process of claim 1 wherein the catalyst contains from about 10 to about 70 wt. % of the polyether.
Claim 7
Dependent Claim
30 words
The process of claim 1 wherein the polyether is a poly(propylene glycol) or poly(ethylene glycol) having a number average molecular weight within the range of about 250 to about 400.
Claim 8
Dependent Claim
82 words
A process for making an epoxide polymer, said process comprising heating an epoxide in the presence of a catalyst, and optionally in the presence of a starter polyol, under conditions effective to polymerize the epoxide and produce the epoxide polymer, wherein the catalyst comprises zinc hexacyanocobaltate, tert-butyl alcohol, and from about 10 to about 70 wt. %, based on the amount of catalyst, of a polyether polyol having a number average molecular weight within the range of about 250 to about 500.
Claim 9
Dependent Claim
82 words
A process for making an epoxide polymer, said process comprising heating an epoxide in the presence of a catalyst, and optionally in the presence of a starter polyol, under conditions effective to polymerize the epoxide and produce the epoxide polymer, wherein the catalyst comprises zinc hexacyanocobaltate, tert-butyl alcohol, and from about 10 to about 70 wt. %, based on the amount of catalyst, of a polyether polyol having a number average molecular weight within the range of about 250 to about 500.
Claim 10
Dependent Claim
11 words
The process of claim 7 wherein the epoxide is propylene oxide.
Claim 11
Dependent Claim
31 words
The process of claim 7 wherein the polyether polyol is a poly(propylene glycol) or poly(ethylene glycol) having a number average molecular weight within the range of about 250 to about 400.
References Cited (Backward Citations)
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