Title:
PRODUCTION OF POLYACETAL COPOLYMER
Document Type and Number:
Japanese Patent JP3269790
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a process for the production of a polyacetal copolymer having improved polymerization degree (molecular weight), stability, mechanical strength, etc., in improved polymerization yield while solving the problems such as thermal stability in the case of the copolymerization of trioxane using a perfluoroalkylsulfonic acid catalyst.
SOLUTION: A polyacetal copolymer is produced by the copolymerization of a main monomer consisting of trioxane with a comonomer consisting of a cyclic ether or cyclic formal having at least one carbon-carbon bond. The copolymerization is carried out by using at least one kind of polymerization catalyst selected from a perfluoroalkylsulfonic acid and its derivative and adding a mixture of the polymerization catalyst and a part or total of the comonomer to trioxane.
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Inventors:
Kappei Ohnishi
Kaoru Yamamoto
Kaoru Yamamoto
Application Number:
JP15467697A
Publication Date:
April 02, 2002
Filing Date:
June 12, 1997
Export Citation:
Assignee:
Polyplastics Co., Ltd.
International Classes:
C08G2/18; (IPC1-7): C08G2/18
Domestic Patent References:
| JP63101410A | ||||
| JP4110316A |
Attorney, Agent or Firm:
Kaoru Furuya (4 outside)