Process for preparing polyoxymethylenes
AssigneeAsahi Kasei Kogyo Kabushiki Kaisha
InventorsKazuhiko Matsuzaki, Minoru Hamada, Hisaya Sakurai
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Abstract
In a process for preparing polyoxymethylenes by polymerizing formaldehyde in the presence of an anionic polymerization catalyst, the use of a polyhydric alcohol having at least three alcoholic hydroxyl groups in the molecule permits the preparation of polyoxymethylenes which have desired molecular weights along with improved melt fluidity and which are excellent in processability.
Claims20
A process for preparing polyoxymethylene having a desired molecular weight and improved melt fluidity and processability, which comprises:
- polymerizing formaldehyde in the presence of an anionic polymerization catalyst and in the presence of a polyhydric alcohol having at least three alcoholic hydroxyl groups in the molecule.
A process for preparing a polyoxymethylene having a desired molecular weight and improved melt fluidity and processability, consisting essentially of:
- polymerizing formaldehyde in the presence of an anionic polymerization catalyst and in the presence of a polyhydric alcohol having at least three alcoholic hydroxyl groups in the molecule.
Dependencies are inferred from the claim text.