Title:
PRODUCTION OF POLYOXYMETHYLENE COPOLYMER
Document Type and Number:
Japanese Patent JP3137896
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To produce a polyoxymethylene copolymer having a high thermal stability.
SOLUTION: This polymer is produced by copolymerizing trioxane with 1,3-dioxolane in the presence of at least one polymerization catalyst selected from the group consisting of boron trifluoride, boron trifluoride hydrate, and coordination complex compounds of an organic oxygen or sulfur compound and boron trifluoride. The 1,3-dioxolane used comprises one containing 2- methyl-1,3-dioxolane in an amount of at most 500ppm by weight and a peroxide in an amount of at most 15ppm by weight in terms of hydrogen peroxide and having at least one sterically hindered phenol in an amount of 10-500ppm by weight added thereto.
Inventors:
Noritaka Tanimura
Yukio Tanikawa
Yukio Tanikawa
Application Number:
JP5444296A
Publication Date:
February 26, 2001
Filing Date:
March 12, 1996
Export Citation:
Assignee:
ASAHI KASEI KABUSHIKI KAISHA
International Classes:
C08G2/10; C08G2/18; C08G2/24; (IPC1-7): C08G2/18
Domestic Patent References:
| JP7286023A | ||||
| JP5155958A |