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混凝土防水材料辛基硅烷的合成工艺研究

DOI: 10.14062/j.issn.0454-5648.2015.09.21

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Abstract:

以1-辛烯和三乙氧基氢硅烷为原料,在Karetedt催化剂及酸促进剂作用下,进行硅氢加成反应合成正辛基三乙氧基硅烷,研究了反应温度、滴加方式、催化剂用量、促进剂用量、滴加时间等工艺条件对原料烯烃异构化及产品收率的影响。利用核磁共振(1HNMR)对烯烃异构体和目标产品正辛基三乙氧基硅烷进行结构鉴定,利用气相色谱对反应后液体进行进一步定性、定量检测。结果表明以三乙氧基氢硅烷为滴加剂,反应温度在90~100℃之间,催化剂用量0.00015%(质量分数)~0.00020%,促进剂用量为0.15%~0.20%,滴加时间1.5h为正辛基三乙氧基硅烷合成的最佳工艺条件。在此条件下,反应后液体中异构烯烃含量为1.34%,产品含量为92.48%。

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