Title:
CATALYST COMPOSITION FOR POLYMERIZING PROPYLENE OXIDE
Document Type and Number:
Japanese Patent JP3871447
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain the subject composition capable of producing poly(propylene oxide) whose mol.wt. can be controlled and which has a relatively narrow mol.wt. distribution width and hydroxyl groups at both the molecular ends by mixing a crown ether compound with an alkali metal alkoxide, etc.
SOLUTION: This catalyst composition for polymerizing propylene oxide comprises (A) a crown ether compound, preferably 18-crown 5, benzo 18-crown 6, dibenzo 18-crown 6, etc., (B) an alkali metal alkoxide such as potassium t-butoxide or an alkali metal hydroxide such as potassium hydroxide, and (C) an organic Lewis acid, preferably methyl aluminum 2,6-di-t-butyl-4- methylphenoxide, methyl aluminum 2,2'-methylenebis(5-t-butyl-4- methylphenoxide), etc. The component A is preferably contained in an amount of ≥1 mole per mole of the component B.
Inventors:
Toyohisa Ishida
Takeshi Endo
Takeshi Endo
Application Number:
JP25785198A
Publication Date:
January 24, 2007
Filing Date:
September 11, 1998
Export Citation:
Assignee:
Japan Chemical Technology Strategy Promotion Organization
International Classes:
C08G65/10; (IPC1-7): C08G65/10
Domestic Patent References:
| JP56043322A | ||||
| JP52137498A | ||||
| JP60237029A | ||||
| JP2247220A | ||||
| JP61197631A |
Attorney, Agent or Firm:
Michiteru Soga
Michiharu Soga
Yutaka Ikeya
Hidetoshi Furukawa
Suzuki Kenchi
Masahisa Hase
Keiro Mochizuki
Michiharu Soga
Yutaka Ikeya
Hidetoshi Furukawa
Suzuki Kenchi
Masahisa Hase
Keiro Mochizuki
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