| Patent Number |
Title Of Patent |
Date Issued |
| 7226988 |
Method of forming polyetherols in the presence of carboxy-modified aluminum-based catalysts |
June 5, 2007 |
| A polyether polyol is formed by a method utilizing a carboxy-modified aluminum-based catalyst. The method includes providing an alkylene oxide, providing an initiator molecule having at least one alkylene oxide reactive hydrogen, and reacting the alkylene oxide with the initiator mol |
| 7135427 |
Carboxy-modified aluminum-based catalyst compositions |
November 14, 2006 |
| A carboxy-modified aluminum-based catalyst composition is of the general formula P(O)(OAlR'R'').sub.3 or RP(O)(OAlR'R'').sub.2 wherein O represents oxygen, P represents pentavalent phosphorous, Al represents aluminum, R comprises hydrogen, an alkyl group, or an aryl group, and R' and |
| 6869905 |
Synthesis of double metal cyanides with non-aqueous solutions |
March 22, 2005 |
| An improved method for synthesizing a double metal cyanide (DMC) catalyst includes combining a non-aqueous solution of a first metal salt, such as ZnBr.sub.2, with a non-aqueous solution of a second metal salt, such as CoBr.sub.2, and with a non-aqueous solution of an alkali metal cyanid |
| 6806348 |
Process for removing and regenerating a double metal cyanide (DMC) catalyst from a polymer polyo |
October 19, 2004 |
| A method of removing and reclaiming a double metal cyanide (DMC) catalyst from a polyol is disclosed. A polymeric acid that is soluble in the polyol is introduced into the polyol during or after the polymerization reaction. The polymeric acid reacts with the double metal cyanide catalyst |
| 6800583 |
Suspension of multimetal cyanide compounds, their preparation and their use |
October 5, 2004 |
| Catalyst suspensions for the ring-opening polymerization of alkylene oxides comprise a) at least one multimetal cyanide compound having a crystalline structure and a content of platelet-shaped particles of at least 30% by weight, based on the multimetal cyanide compound, and b) at |
| 6762278 |
Process for the copolymerization of alkylene oxides and carbon dioxide using suspensions of mult |
July 13, 2004 |
| A method of forming a polyethercarbonate polyol using a multimetal cyanide compound is disclosed. The method includes providing a multimetal cyanide compound having a crystalline structure and a content of platelet-shaped particles of at least 30% by weight, based on the weight of the mu |
| 6713599 |
Formation of polymer polyols with a narrow polydispersity using double metal cyanide (DMC) catal |
March 30, 2004 |
| A method of forming a polyol includes the steps of reacting an initiator with an alkylene oxide, and optionally carbon dioxide, in the presence of a double metal cyanide catalyst and a sterically hindered chain transfer agent capable of protonating the growing polyol polymer. The presenc |
| 6593268 |
One-step synthesis of double metal cyanides |
July 15, 2003 |
| Improved methods for synthesizing double metal cyanide (DMC) catalysts are disclosed. These methods combine an aqueous solution of a first metal salt, such as ZnCl.sub.2, with an aqueous solution of a second metal salt, such as CoCl.sub.2, and with an aqueous solution of an alkali metal |
| 6436867 |
One-step synthesis of double metal cyanides |
August 20, 2002 |
| An improved method for synthesizing a double metal cyanide (DMC) catalyst is disclosed. The method combines an aqueous solution of a first metal salt, such as ZnCl.sub.2, with an aqueous solution of a second metal salt, such as CoCl.sub.2, and with an aqueous solution of an alkali metal |
| 6410801 |
Continuous process for the production of polyether polyols |
June 25, 2002 |
| A continuous alkoxylation process for the production of polyether polyols is disclosed. The process comprises the use of a plurality of reaction modules each having an outer tube and an inner tube with annular chamber between them. A spiral reaction tube is spaced from the inner tube and |
| 6380367 |
Continuous process for the production of sucrose based polyether polyols |
April 30, 2002 |
| A continuous process for the formation of sucrose based polyols is disclosed. The process comprises the steps of continuously forming an aqueous sucrose solution which is continuously combined with a catalyst and an alkylene oxide and flowed through a first spiral reaction tube. The |
