Title:
PRODUCTION OF POLYETHER COPOLYMER POWDER
Document Type and Number:
Japanese Patent JPH03207720
Kind Code:
A
Abstract:
PURPOSE:To obtain the subject powder having crystalline nature and excellent heat-resistance, solvent resistance and mechanical strength by supplying a neutral polar solvent solution containing a polyether copolymer composed of two specific kinds of recurring units to a kneader and granulating the polymer under heating and deaeration at a specific temperature. CONSTITUTION:The objective powder is produced by supplying a solution of a neutral polar solvent (e.g. DMF) containing a polyether polymer composed of the recurring unit of formula I and the recurring unit of formula II (n is 1 or 2) at a molar ratio I/(I+II) of 0.1-0.9 to a kneader (preferably a vented twin-screw extruder) and granulating the polymer under heating and deaerating at 100-300 deg.C and e.g. 50-150rpm while slightly deaerating the system to a pressure of 100-700Torr.
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Inventors:
HAYASHI MIKIYA
KAYANO CHIKAFUMI
MATSUO SHIGERU
TAGAMI SANAE
KAYANO CHIKAFUMI
MATSUO SHIGERU
TAGAMI SANAE
Application Number:
JP206490A
Publication Date:
September 11, 1991
Filing Date:
January 08, 1990
Export Citation:
Assignee:
IDEMITSU KOSAN CO
International Classes:
C08J3/12; C08G65/46; C08L71/00; (IPC1-7): C08G65/46; C08J3/12; C08L71/00
Attorney, Agent or Firm:
Naoki Fukumura
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