Polyoxymethylene copolymer and molded article thereof
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United States of America Patent
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Sep 9, 2003
Grant Date -
Jul 3, 2003
app pub date -
Oct 15, 2002
filing date -
Mar 27, 2001
priority date (Note) -
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Abstract
A polyoxymethylene copolymer which is a polyoxymethylene copolymer obtained by copolymerizing trioxane and 8 to 20 mol, per 100 mol of the trioxane, of 1,3-dioxolane and which (i) has a crystallization time period of 10 to 2,000 seconds at 143.degree. C., (ii) withstands 30 to 1,000 cycles of a bending durability test and (iii) has residence heat stability for 40 minutes or more, and a molded article formed of the copolymer. According to the present invention, there can be provided a polyoxymethylene copolymer excellent in bending durability and heat stability and excellent in moldability, and a molded article formed thereof.
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