To provide a polyacetal resin composition having high stiffness, high dimensional stability and excellent creep characteristics.
The composition is produced by blending 99.9-90 pts.wt. of (A) a linear polyacetal resin of a melt index of 1-50 g/min obtained by copolymerizing 99.5-97.5 wt.% of (a) trioxane with 0.5-2.5 wt.% of (b) one or more selected from monofunctional cyclic ether compounds and monofunctional cyclic formal compounds with 0.1-10 pts.wt. of (B) a branched or cross-linked polyacetal resin of a melt index of 0.1-10 g/min obtained by copolymerizing 99.49-95.0 wt.% of (a) trioxane, 0.5-4.0 wt.% of (b) one or more selected from monofunctional cyclic ether compounds and monofunctional cyclic formal compounds and 0.01-1.0 wt.% of (c) a multifunctional glycidyl ether compound having three or four functional groups, and (A) and (B) are selected so that the ratio of the melt index of (A) to that of (B) meets condition (1): 0.02≤MIB/ MIA≤1.5 (wherein, MIA is the melt index of (A); and MIB is the melt index of (B)).
OKAWA HIDETOSHI
TAJIMA YOSHIHISA
| JP2002003694A | 2002-01-09 | |||
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