【摘要】 选用实验室制备的四种新型反应型受阻胺类光稳定剂(r-HALS):4-甲基丙烯酰氧基-2,2,6,6-四甲基哌啶醇酯(MTMP)、4-丙烯酰氧基-2,2,6,6-四甲基哌啶醇酯(ATMP)、4-甲基丙烯酰氧基-1,2,2,6,6-五甲基哌啶醇酯(MPMP)和4-丙烯酰氧基-1,2,2,6,6-五甲基哌啶醇酯(APMP),实现了紫外光固化聚合物涂层(膜)的原位(in situ)光稳定化。通过室内人工光老化实验和在光氧化过程中黄度指数(Yellowness Index,YI)的监测,再与典型的商用HALS(Tinuvin770和Tinuvin292)进行平行实验对比,考察了r-HALS对紫外光固化聚合物涂层的光防护效果,探索一条紫外光固化聚合物涂层原位(in situ)光稳定化的新途径。更多还原

【Abstract】 The synthesis and characterization of four reactive hindered piperidinol derivatives,4-methacryloyl-1,2,2,6,6-pentamethyl-piperidinyl(MPMP),4-acryloyl-1,2,2,6,6-pentamethyl-piperidinyl(APMP),4-methacryloyl-2,2,6,6-tetramethyl-piperidinyl(ATMP) and 4-cryloyl-2,2,6,6-tetramethyl-piperidinyl(MTMP) as reactive-hindered amine light stabilizers(r-HALS) were reported.The in situ photo-stabilizing effects of these r-HALS applied in UV-curing coatings were evaluated using Yellowness Index as a characterizing parameter.It is found that r-HALS are superior to the corresponding commercial HALS such as Tinuvin770 and Tinuvin292,which may be attributed to better dispersion and reduced migration(or evaporation) on the surface of the coatings matrix.更多还原