Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
PROCESS FOR PRODUCING POLYCONDENSATION POLYMER, AND POLYMERIZER
Document Type and Number:
WIPO Patent Application WO/2012/056903
Kind Code:
A1
Abstract:
A process for producing a polycondensation polymer, the process including a guide polymerization step in which a molten prepolymer is fed to the top of a wire guide in a polymerizer for polycondensation polymer production and is allowed to descend while being kept in contact with the wire guide and the molten prepolymer is thereby polymerized to obtain the polycondensation polymer. The process is characterized in that the wire guide is equipped with perpendicular wires comprising a plurality of perpendicular wires extending in the vertical direction and arranged side by side so as to be separated from each other at a pitch L1 (mm). The process is further characterized in that in the guide polymerization step, the molten prepolymer fed to the top of the wire guide is made to gather and form one or more molten-prepolymer masses on the perpendicular wires so that when the width of each molten-prepolymer mass as measured at the position 200 mm below the top and along the direction of the side-by-side arrangement of the perpendicular wires is expressed by L2 (mm), then the width L2 (mm) of at least some of the molten-prepolymer masses satisfies the following relationship (1) with the L1 (mm). L1 < L2 (1)

Inventors:
AMINAKA MUNEAKI (JP)
YASUDA KAZUHARU (JP)
HACHIYA HIROSHI
Application Number:
PCT/JP2011/073658
Publication Date:
May 03, 2012
Filing Date:
October 14, 2011
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
ASAHI KASEI CHEMICALS CORP (JP)
HACHIYA YOKO (JP)
AMINAKA MUNEAKI (JP)
YASUDA KAZUHARU (JP)
International Classes:
C08G64/20
Domestic Patent References:
WO2005123805A12005-12-29
WO2007063757A12007-06-07
WO1999065970A11999-12-23
WO1997022650A11997-06-26
WO1999036457A11999-07-22
WO1999064492A11999-12-16
WO2005121210A12005-12-22
WO2005035620A12005-04-21
Foreign References:
JPH07292097A1995-11-07
JP2004516172A2004-06-03
JPS5019600B11975-07-08
JPS5236159B21977-09-13
JPS535718B21978-03-01
JPH02153923A1990-06-13
JPH08225641A1996-09-03
JPH08225643A1996-09-03
JPH08325373A1996-12-10
JPH1081741A1998-03-31
JPH10298279A1998-11-10
US5589564A1996-12-31
Other References:
See also references of EP 2634202A4
Attorney, Agent or Firm:
HASEGAWA Yoshiki et al. (JP)
Yoshiki Hasegawa (JP)
Download PDF:
View/Download PDF      PDF Help
Claims:



 
Previous Patent: COVER FOR CUTTING TOOL, HOLDER FOR CUTTING, AND CUTTING DEVICE

Next Patent: ORGANIC ELECTROLUMINESCENT ELEMENT AND LIGHT-EMITTING DEVICE