Title:
CATALYST DEACTIVATION METHOD FOR OXYMETHYLENE COPOLYMER AND PRODUCTION OF STABILIZED OXYMETHYLENE COPOLYMER
Document Type and Number:
Japanese Patent JP3269776
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an efficient method for the deactivation of a catalyst for an oxymethylene copolymer after the polymn.
SOLUTION: An oxymethylene copolymer coming out of a polymerizer is ground with a grinder and subjected to a treatment for deactivating the polymn. catalyst with a basic compd. The grinder has a fixed element, a rotating element, a rotation drive unit, and a grinding-product dischage port 11 equipped with an inlet port 10 for the material being ground and a screen mesh 8. Each of the fixed and rotating elements has one or more rows of projections intermittently installed vertically on concentric circles on a disk-like substrate. The grinding is enabled by rotating the rotating element with certain clearances between projections 1, 2, 3 installed on the concentric circles on the rotating element and projections 5, 6 installed on the concentric circles on the fixed element 4, 5.
Inventors:
Hiroyuki Miyachi
Naoyuki Kobayashi
Fukui Yuichi
Naoyuki Kobayashi
Fukui Yuichi
Application Number:
JP25898496A
Publication Date:
April 02, 2002
Filing Date:
September 30, 1996
Export Citation:
Assignee:
Polyplastics Co., Ltd.
International Classes:
C08G2/08; C08F6/02; C08G2/10; C08G2/24; C08G2/28; C08G2/30; C08G59/00; C08G59/02; C08G59/18; C08K5/098; C08K5/13; (IPC1-7): C08G2/28
Domestic Patent References:
| JP5834819A |
Attorney, Agent or Firm:
Kaoru Furuya (3 outside)