Branched polyacetal resin composition

A branched polyacetal resin composition, comprising:

• (A) 100 parts by weight of a branched polyacetal copolymer which is the copolymeriziation reaction product of:
• (a) 100 parts by weight of trioxane,
• (b) 0.001 to 10 parts by weight of a monofunctional glycidyl compound, and
• (c) 0.1 to 20 parts by weight of a cyclic ether compound which is copolymerizable with trioxane, wherein
• said branched polyacetal copolymer has an oxymethylene group as the main repeating unit and a branching unit represented by the following formula (I):
• wherein m and n each is an integer of 0 to 5;
• the sum of m+n is 1 to 5;
• and R is a monovalent organic group having a molecular weight of 40 to 1000;
• (B) 0.01 to 5 parts by weight of a weather (light) resistant stabilizer;
• and
• (C) 0.01 to 5 parts by weight of a hindered amine substance;
• and wherein
• the monofunctional glycidyl compound (b) is selected from the glycidyl ether compounds represented by the following formulae (II), (III) and (IV):
• wherein R1 is a C1-12 alkyl group, a substituted alkyl group, an alkoxy group, an aryl group, a substituted aryl group or halogen;
• and n is an integer of 0 to 5 and, when n is 2 or more, the R1s may be the same or different:
• wherein R2 is a C1-30 alkylene group, a substituted alkylene group or a polyalkylene oxide glycol residue;
• R3 is a C1-12 alkyl group, a substituted alkyl group, an alkoxy group, an aryl group, a substituted aryl group or halogen;
• and n is an integer of 0 to 5 and, when n is 2 or more, the R3s may be the same or different:
• wherein R4 is a C1-30 alkylene group;
• n is an integer of 0 to 20;
• and R5 is a C1-30 alkyl group, a C2-20 alkenyl group or an alkynyl group.