Title:
PRODUCTION OF ACICULAR SINGLE CRYSTAL OF POLYOXYMETHYLENE BY USING COLUMN DRYING
Document Type and Number:
Japanese Patent JPS5681330
Kind Code:
A
Abstract:
PURPOSE: To efficiently produce an acicular single crystal of polyoxymethylene, by drying a solution of a starting material in a column to absolute dryness, adding thereto a catalyst and water and reacting the components.
CONSTITUTION: An acicular single crystal of polyoxymethylene is produced by passing a trioxane solution through a column packed with a drying agent such as zeolite or anhydrous calcium sulfate thereby to dry the trioxane to absolute dryness (moisture content below about 0.1ppm), adding 10-5W10-3mol based on the trioxane, of boron trifluoride and below about 1/20mol based on the boron trifluoride, of water, and thereafter reacting the components at about 30W55°C for about 5W50 hr.
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Inventors:
IGUCHI MASATOSHI
SUEHIRO TETSUROU
YAMAUCHI AIZOU
SHIROTA TADASHI
SUEHIRO TETSUROU
YAMAUCHI AIZOU
SHIROTA TADASHI
Application Number:
JP15838579A
Publication Date:
July 03, 1981
Filing Date:
December 06, 1979
Export Citation:
Assignee:
KOGYO GIJUTSUIN
International Classes:
C08G2/00; C08G2/10; (IPC1-7): C08G2/10