A thermoplastic polyester resin composition, having excellent heat stability and good stability in long-term high-temperature use comprises 100 parts by weight of a thermoplastic polyester blended with a synergistic mixture of firstly,
0.001 ∼ 5 parts by weight of one or more phosphonite compounds expressed by the following formula (I):
(in which R¹, R², R³ and R⁴ represent alkyl, substituted alkyl, aryl, or substituted aryl groups having 1 ∼ 25 carbon atoms which may be identical with or different from one another, and R⁵ represents an alkylene, substituted alkylene, arylene, or substituted arylene group having 4 ∼ 33 carbon atoms), and secondly,
0.001 ∼ 5 parts by weight of one or more hindered phenolic compounds.
The polyester resin may be blended with other thermoplastic resins and glass fillers; and it may also comprise organo-halogen compounds and organophosphorous compounds as flame retardants and metallic oxides or hydroxides as flame retarding auxiliaries.
一种热塑性聚酯
树脂组合物,具有优异的热稳定性和在长期高温使用中的良好稳定性,该组合物由 100 份(重量)热塑性聚酯与以下物质的增效混合物混合而成:首先,由 0.001 ∼ 5 份(重量)由下式(I)表示的一种或多种
膦酸盐化合物组成、
0.001 ∼ 5 份(按重量计)由下式(I)表示的一种或多种
膦酸盐化合物:
(其中 R¹、R²、R³ 和 R⁴ 代表具有 1 ∼ 25 个碳原子的烷基、取代的烷基、芳基或取代的芳基,它们可以彼此相同或不同,而 R⁵ 代表具有 4 ∼ 33 个碳原子的亚烷基、取代的亚烷基、芳基或取代的芳基),其次、
0.001 ∼ 5 重量份的一种或多种受阻
酚类化合物。
聚酯
树脂可与其他热塑性
树脂和
玻璃填料混合,还可包括作为阻燃剂的有机卤化合物和有机
磷化合物,以及作为阻燃助剂的金属氧化物或氢氧化物。