含受阻胺结构的三嗪型光稳定剂的合成及性能研究  

Synthesis and Properties of s-Triazines Light Stabilizer Containing Hindered Amine

作　　者：张宇[1,2] 邵玉昌 刘威 吕连海[1] 

机构地区：[1]大连理工大学精细化工国家重点实验室,辽宁大连116012 [2]大连化工研究设计院,辽宁大连116023

出　　处：《石油化工》2011年第6期640-643,共4页Petrochemical Technology

摘　　要：以2-[2-羟基-4-（乙氧基羰基）甲氧基苯基]-4，6-二芳基-1，3，5-三嗪为原料（1A和2A），分别与2，2，6，6-四甲基哌啶醇和1，2，2，6，6-五甲基哌啶醇进行酯交换反应，合成了4种含有2-[2-羟基-4-（甲酸哌啶酯基）甲氧基苯基]-4，6-二芳基-1，3，5-三嗪结构的光稳定剂（1B，2B，3B，4B），收率分别为72％，68％，74％，66％；对光稳定剂进行了紫外吸收、热稳定性和光稳定性的测试。实验结果表明，在引入受阻胺基团后，光稳定剂的紫外吸收波长和摩尔消光系数未有明显变化；热稳定性略有降低；而光稳定性得到了增强，1B和2B在光老化20，30，40h后相对于其原料1A（取代基R1=R2=H）的分解率降低了3—4百分点，而3B和4B在光老化40h后相对于其原料2A（R1=H，R2=CH3）的分解率分别降低了4．88，3．06百分点。引入受阻胺基团的光稳定剂的光稳性得到了明显增强。Four light stabilizers （1B, 2B, 3B and 4B） containing 2-[ 2-hydroxy-4-（ piperidyl formare-l-yl ） methoxyphenyl ] -4, 6-diaryl-1, 3, 5-triazine structure were synthesized by transesterification of 2- [ 2-hydroxy-4-ethoxycarbonyl-methoxyphenyl ] -4,6-diaryl-1,3,5-triazine （ 1A and 2A） with 2, 2, 6, 6-tetramethylpiperidin-4-ol and 1, 2, 2, 6, 6-pentamethyl -piperidin-4-ol respectively. The yields were 72%, 68%, 74% and 66% respectively. Their ultraviolet absorptions, thermal stabilities and light stabilities were investigated. The results indicated that the ultraviolet absorption wavelength and molar absorption coefficient did not change significantly, the thermal stability decreased slightly and the light stability was enhanced after the hindered amine groups were introduced. Decomposition rates of compounds 1B and 2B declined 3-4 percentage points relative to raw material 1A （both substituents R1 and Rz were H） after photoaging 20, 30 and 40 h. Decomposition rates of compounds 3B and 4B declined 4.88 and 3.06 percentage points respectively, relative to raw material 2A（ R1 was H and R2 was CHs ） after photoaging 40 h. The light stability was obviously improved after the hindered amine groups were introduced

关 键 词：光稳定剂 三嗪 受阻胺 紫外吸收剂 自由基捕获剂 

分 类 号：TQ314.257[化学工程—高聚物工业]