A highly conductive resin composition comprising:
(a) 55% by weight or more of a polyoxymethylene resin,
(b) 5-15% by weight of a carbon black exhibiting a dibutyl phthalate absorption of 300 ml/100 g or more,
(c) 0.05-10% by weight of an epoxy compound, and
(d) 5-20% by weight of a polyolefin copolymer of ethylene and an α-olefin of 3-6 carbon atoms, or a polyester copolymer having diol residues represented by formula (1) and dicarboxylic acid residues represented by formulae (2), (3) and (4),-(O-R-O)- R is an aliphatic hydrocarbon residue of 2-12 carbon atoms,
R¹ is an ethylene group, a polymethylene group of 3-6 carbon atoms, or an alkenylene group of 2-6 carbon atoms,
ℓ is an integer of 7-24, Ph is an aromatic hydrocarbon residue, and the molar ratio of (2)/[(2) + (3) + (4)] being 5-100 mole %.
高导电性
树脂组合物,包括
(a) 55%(重量)或更多的
聚甲醛树脂、
(b) 5-15%(重量百分比)的
炭黑,其
邻苯二甲酸二丁酯吸收量为 300 毫升/100 克或以上、
(c) 0.05-10%(重量百分比)的环氧化合物,和
(d) 5-20%(重量百分比)的
乙烯和 3-6 个碳原子的 α-烯烃的聚烯烃共聚物,或具有式(1)代表的二元醇残基和式 (2)、(3)和(4)代表的二
羧酸残基的聚酯共聚物,-(O-R-O)- R 是 2-12 个碳原子的脂肪烃残基、
R¹ 是
乙烯基、3-6 个碳原子的聚亚甲基或 2-6 个碳原子的烯基、
ℓ是7-24的整数,Ph是
芳香烃残基,(2)/[(2)+(3)+(4)]的摩尔比为5-100摩尔%。