Preparation and properties of UV-curable acrylate compositions containing silicon

摘要

Some di- and triacrylates were subjected to Michael addition reaction with N-cyclohexyl-gamma-aminopropylmethyldimethoxysilane (CAMS).FT-IR method has been used to follow the course of the reaction of -NH group in CAMS with double bond in an acrylate.Post-reaction mixtures obtained underwent UV-curing in the presence of a photoinitiator (2-hydroxy-2,2-di-methyl-1-phenylethane-l-one,trade name "Darocur 1173") and formed thin films on the glass or plastic substrate.Dependence of the thermal stability of cured material on its initial composition was characterized using thermo-gravimetric method.There were determined the effects of non-reacted acrylic groups' part in the post-reaction mixture as well as of irradiation time (crosslinking degree) on hardness and brittleness of the coatings cured.Silicon atoms presence in the compositions improves their elasticity but deteriorates thermal stability.