A novel bi - pyridine quaternary ammonium salt cationic surfactants was prepared by acrylic modified rosin.

普通松香通过丙烯酸改性,与氯化亚砜、甲醛、吡啶合成新型吡啶双季铵盐阳离子表面活性剂.

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It was pointed out that the quaternary ammonium salt was the most important phase transfer catalyst.

指出了此类合成反应中所采用的重要相转移催化剂是季铵盐类.

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OBJECTIVE To study the synthesis of quaternary ammonium salt derivatives of haloperidol and their vasodilative activities.

目的合成氟哌啶醇季铵盐衍生物及其还原物并研究它们的扩血管活性.

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Transparent hair shampoo was prepared using poly siloxane quaternary ammonium salt microemulsion as a conditioner.

以聚硅氧烷季铵盐微乳液为调理剂制备透明洗发香波.

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