Flame retardancy of polyphenylene ether resins is increased by blending with the resin a flame retarding amount of a halophenyl hydrocarbyl ester. The ester is preferably the reaction production of a halogenated phenol, preferably a bromophenol, and a hydrocarbyl acid, acid chloride or acid anhydride. The polyphenylene ether resin may include homopolymers or copolymers of polyphenylene ethers or blends of polyphenylene ethers with vinyl aromatic resins such as styrene polymers and copolymers. The flame retarding halophenyl esters are also effective as processing aids in improving the flowability and moldability of the polyphenylene ether resins during melt processing.
通过在聚苯醚
树脂中掺入一定量的阻燃性卤代苯基烃基酯,可提高聚苯醚
树脂的阻燃性。这种酯最好是卤代
苯酚(最好是
溴苯酚)与烃基酸、酸
氯化物或酸酐反应生成。聚苯醚
树脂可包括聚苯醚的均聚物或共聚物,或聚苯醚与
乙烯基芳香族
树脂(如
苯乙烯聚合物和共聚物)的混合物。阻燃卤苯酯还可作为加工助剂,在熔融加工过程中改善聚苯醚
树脂的流动性和成型性。