UVA-HALS复合型光稳定剂的合成及表征

Synthesis and Characterization of UVA-HALS Composite Light Stabilizer

以邻硝基苯胺为重氮组分,对羟基苯磺酸钠为偶合组分,氯化亚砜为酰氯化试剂,4-氨基-2,2,6,6-四甲基哌啶胺为胺组分,通过重氮化、偶合、还原闭环、酰氯化等化学反应合成了一只分子内含有苯并三唑紫外吸收片段和受阻胺光稳定片段的UVA-HALS复合型光稳定剂UVH-1,使其具有吸收紫外线和捕获自由基等多种光稳定功能,从而提高其光稳定性和紫外线防护效果。并通过红外、质谱和核磁等手段,对中间体和最终产物进行了结构表征,表明其结构与设计相符。

This study synthesizes a UVA-HALS composite light stabilizer UVH-1with benzotriazole ultraviolet absorption segment and hindered amine light stability segment in one molecule through chemical reactions such as diazotization,coupling,reduction and ring closure and acylating chlorination with orthonitroaniline as diazo component,p-hydroxybenzenesulfonic acid sodium satt as coupling component,thionyl chloride as acyl chloride reagent and 4-amidogen-2,2,6,6-tetramethyl piperidine amine as amine component,thus providing it with multiple light stability functions such as ultraviolet absorber and radical trap and improving its light stability and ultraviolet protection effect,and conducts structural characterization of intermediates and final product through infrared,mass spectrum and nuclear magnetism.It shows that its structure is consistent with the design.