Method for producing oxymethylene copolymer resin composition, and oxymethylene copolymer resin composition

1. A method for producing an oxymethylene copolymer resin composition, comprising:

adding to an oxymethylene copolymer (A), an Mn micromole of an amine-substituted triazine compound (B) per gram of the oxymethylene copolymer (A), an Mc micromole of a choline hydroxide (C) per gram of the oxymethylene copolymer (A), and 0.1 to 1.0 parts by weight of an antioxidant (D) with respect to 100 parts by weight of the oxymethylene copolymer (A), and melt kneading a mixture of the oxymethylene copolymer (A), amine-substituted triazine compound (B), the choline hydroxide (C), and the antioxidant (D), wherein

Mn (μmol/g-POM) and Mc (μmol/g-POM) satisfy:

6.5<(Mn+Mc×8)<25,

Mn is from 1.0 to 2.0, and

Mc is from 0.8 to 2.8:

the amine-substituted triazine compound (B) is melamine; and

the antioxidant (D) is triethylene glycol bis[3-(34-butyl-5-methyl-4-hydroxyphenyl)propionate].

2. An oxymethylene copolymer resin composition, comprising:

an oxymethylene copolymer (A),

an Mn micromole of an amine-substituted triazine compound (B) per gram of the oxymethylene copolymer (A),

an Mc micromole of a choline hydroxide (C) per gram of the oxymethylene copolymer (A), and

0.1 to 1.0 parts by weight of an antioxidant (D) with respect to 100 parts by weight of the oxymethylene copolymer (A), wherein

Mn (μmol/g-POM) and Mc (μmol/g-POM) satisfy:

6.5<(Mn+Mc×8)<25,

Mn is from 1.0 to 2.0, and

Mc is from 0.8 to 2.8;

the amine-substituted triazine compound (B) is melamine; and

the antioxidant (D) is triethylene glycol bis[3-(3-t-butyl-5-methyl-4-hydroxyphenyl)propionate].