申请人:POLYPLASTICS CO. LTD.
公开号:EP0516351A2
公开(公告)日:1992-12-02
A flame-retardant polybutylene terephthalate resin composition suitable for a material of a contact-bearing electrical part which generates an organic gas and a halogenous corrosive gas each in a reduced amount and therefore hardly corrodes the metal constituting the contact even after prolonged use, which comprises
(A) 100 parts by weight of a polybutylene terephthalate resin having an intrinsic viscosity of 0.75 to 1.5 dL/g,
(B) 1 to 50 parts by weight of a halogenated phenoxy compound composed of repeating units represented by the general formula (1) and having a number-average degree of polymerisation of 6 to 30:
wherein X represents a bromine or chlorine atom; and Y represents alkylene having 1 to 10 carbon atoms, alkylidene, cycloalkane, carbonyl, -O-, -S- or -SO2-,
(C) 0.1 to 30 parts by weight of an antimony compound containing antimony pentoxide and an alkali metal oxide as constituents,
(D) 0.01 to 10 parts by weight of a fatty acid ester of a polyhydric alcohol, and
(E) 0 to 150 parts by weight of a filler.
一种阻燃性聚对苯二甲酸丁二酯树脂组合物,适用于接点承载电气部件的材料,该组合物产生的有机气体和卤素腐蚀性气体的量都较少,因此即使长期使用也几乎不会腐蚀构成接点的金属,它包括
(A) 100 重量份的聚对苯二甲酸丁二醇酯树脂,其固有粘度为 0.75 至 1.5 dL/g、
(B) 1 至 50 重量份的卤代苯氧基化合物,该化合物由通式(1)代表的重复单 元组成,平均聚合度为 6 至 30:
其中 X 代表溴原子或氯原子;Y 代表具有 1 至 10 个碳原子的亚烷基、亚烷基、环 烷基、羰基、-O-、-S- 或-SO2-、
(C) 0.1 至 30 重量份的锑化合物,其成分含有五氧化二锑和碱金属氧化物、
(D) 以重量計 0.01 至 10 份的多元醇脂肪酸酯,及
(E) 0 至 150 份(重量比)填料。