Title:
METHOD FOR PRODUCING DEHYDRATION POLYCONDENSATION POLYMER
Document Type and Number:
Japanese Patent JP2016141698
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide, in a production method of a dehydration polycondensation polymer comprising a step of subjecting a prepolymer to dehydration polycondensation in an extruder having (a) vent portion(s), a production method having good production efficiency while suppressing vent-up.SOLUTION: The method for producing a dehydration polycondensation polymer comprises a step of subjecting a prepolymer to dehydration polycondensation in an extruder having (a) vent portion(s), where R as defined by the following formula (1) is set at 2.50 or more and 4.50 or less. R=S+1.5×V1/V0 (1), where V0: an effective space volume [cm] of an extruder, V1: a total volume [cm] of a prepolymer, a polymer, and water vapor contained therein inside the extruder, and S: a distilling rate per unit area [mg/(cm×sec)] of condensed water from a fore vent portion.SELECTED DRAWING: Figure 2
Inventors:
ISHIMARU TAKU
TSUDA YASUNORI
ITSUDO SUKETAKA
TSUDA YASUNORI
ITSUDO SUKETAKA
Application Number:
JP2015016235A
Publication Date:
August 08, 2016
Filing Date:
January 30, 2015
Export Citation:
Assignee:
TORAY INDUSTRIES
International Classes:
C08G85/00; C08G69/28
Domestic Patent References:
| JPS6195026A | 1986-05-13 | |||
| JPH07126380A | 1995-05-16 | |||
| JP2012149238A | 2012-08-09 | |||
| JP2004204026A | 2004-07-22 | |||
| JP2010116575A | 2010-05-27 | |||
| JP2011530639A | 2011-12-22 |