Title:
ポリテトラヒドロフランまたはテトラヒドロフラン-コポリマーのオリゴマーの獲得法
Document Type and Number:
Japanese Patent JP2007506811
Kind Code:
A
Abstract:
A process for obtaining oligomers of polytetrahydrofuran or of tetrahydrofuran copolymers from a methanolic crude product which contains polytetrahydrofuran or tetrahydrofuran copolymers and is obtained in the transesterification of the mono- and/or diesters of polytetrahydrofuran or tetrahydrofuran copolymers with methanol, which includes a) removing the majority of the methanol from the crude product in a first distillation stage, b) separating the resulting bottom product by distillation into a top fraction containing the oligomers of polytetrahydrofuran or of tetrahydrofuran copolymers, and polytetrahydrofuran or tetrahydrofuran copolymer, and c) condensing the oligomers of polytetrahydrofuran or of tetrahydrofuran copolymers out of the top fraction from stage b).
Inventors:
Volkmer Menger
Michael Schwarz Trauber
Martin Haupner
Claus-Peter Puffaff
Michael Schwarz Trauber
Martin Haupner
Claus-Peter Puffaff
Application Number:
JP2006518013A
Publication Date:
March 22, 2007
Filing Date:
June 19, 2004
Export Citation:
Assignee:
BASF Aktiengesellschaft
International Classes:
C08G65/20; C08G65/30; C08G65/331
Domestic Patent References:
| JPS56157402A | 1981-12-04 | |||
| JPS54116095A | 1979-09-10 | |||
| JPH10237017A | 1998-09-08 | |||
| JP2001064381A | 2001-03-13 | |||
| JP2002105026A | 2002-04-10 | |||
| JP2001335630A | 2001-12-04 | |||
| JP2001059020A | 2001-03-06 | |||
| JP2001011173A | 2001-01-16 |
Foreign References:
| DE4410685A1 | 1995-10-05 | |||
| WO2003018666A1 | 2003-03-06 |
Attorney, Agent or Firm:
Toshio Yano
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Reinhard Einsel
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Reinhard Einsel