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Abstract

Polyacetal copolymers, obtained by copolymerizing (A) 100 parts by weight of trioxane, (B) 0.01 to 10 part(s) by weight of at least one compound selected from among glycidyl ether compounds of the following general formula (I), (II) or (III) and (C) 0 to 20 part(s) by weight of a cyclic ether compound [excluding the glydicyl ether compound (B)] copolymerizable with trioxane, are a polyacetal resin having a high rigidity, excellent creep properties, a high surface hardness and excellent sliding properties: ##STR1## wherein R.sup.1 is a C.sub.1-12 alkyl group, an aryl group or a substtituted aryl group; ##STR2## wherein R.sup.2 represents a C.sub.2-20 polyalkylene oxide glycol residue; ##STR3## wherein R.sup.4 represents an alkyl group having 1 to 30 carbon atoms; R.sup.5 represents an alkylene group having 1 to 30 carbon atoms.

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First Claim