研究了酚系高效减水剂 (以下简称PA)的配方、合成工艺及其性能 ,讨论了影响PA高效减水剂性能的主要反应条件。当磺化剂用量及酚、醛比例确定后 ,合成反应进行的时间及分子量调节剂用量是影响PA高效减水剂性能的重要因素 ,通常将合成反应时间控制在 5～ 7h ,分子量调节剂的用控制在 1 %～ 2 %为宜 The formula, synthesis process and properties of phenolic superplasticizer (hereinafter referred to as PA) were studied. The main reaction conditions affecting the performance of PA superplasticizer were discussed. When the amount of sulfonation agent and the ratio of phenol and aldehyde are determined, the time of the synthesis reaction and the amount of the molecular weight regulator are important factors that affect the performance of the PA superplasticizer. Usually, the synthesis reaction time is controlled at 5 to 7 hours. The molecular weight modifier With control at 1% ~ 2% is appropriate