POLYOXYMETHYLENE COPOLYMER AND PRODUCTION THEREOF.

摘要

A polyoxymethylene copolymer composed of oxymethylene and oxyalkylene units, having a molecular weight of 10,000 to 200,000, containing 0.07 to 0.5 mole % of the oxyalkylene units based on the oxymethylene units, having a ratio of the absorbance of the terminal formate group to that of the methylene group of 0.025 or less as determined by infrared spectroscopy, and excellent in stability and mechanical properties.