Title:
二重金属シアン化物触媒の迅速な活性化法
Document Type and Number:
Japanese Patent JP4368427
Kind Code:
B2
Abstract:
A process for activating double metal cyanide catalysts is disclosed. A polyol starter or starter/catalyst mixture is heated under vacuum under conditions effective to achieve improved stripping compared with that which can be achieved through conventional vacuum stripping. Coupling vacuum stripping with inert gas sparging or stripping in the presence of an organic solvent gives a starter/catalyst mixture that activates rapidly in an epoxide polymerization process. Rapid activation makes process start-ups reliable and reduces cycle time. The process gives polyols with lower viscosity, lower polydispersity, and lower unsaturation for better polyurethanes.
Inventors:
Hayes Joan Yi
Langsdorf Lee Jay
Isa Ax Bruce H
Armelini Fred Jay
Langsdorf Lee Jay
Isa Ax Bruce H
Armelini Fred Jay
Application Number:
JP54984698A
Publication Date:
November 18, 2009
Filing Date:
April 09, 1998
Export Citation:
Assignee:
Bayer Antwerpen Comm.V.
International Classes:
C08G65/10; B01J27/26; C08G65/26
Domestic Patent References:
| JP9040770A | ||||
| JP8311171A | ||||
| JP7196778A | ||||
| JP8104741A | ||||
| JP4193349A |
Attorney, Agent or Firm:
Mitsuo Tanaka
Takuji Yamada
Kenichi Morizumi
Yasuo Shibata
Takuji Yamada
Kenichi Morizumi
Yasuo Shibata