A multifunctional Type II photoinitiator according to Formula (I):
wherein X represents a structural moiety according to Formula (II):
wherein:
A represents a Norrish Type II initiating group; and L represents a divalent linking group positioning the Norrish Type II initiating group A and the CR2R3-group in a 1-5 to a 1-9 position wherein position 1 is defined as the first atom in the aromatic or alicyclic ring of A to which L is covalently bonded and the position 5 to 9 is defined as the carbon atom of the CR2R3-group to which L is covalently bonded, with the proviso that L does not contain an amine. Radiation curable compositions and inks include the multifunctional Type II photoinitiator.
一种多功能的二型光
引发剂,其
化学式为(I):其中X代表
化学式(II)的结构基团:其中:A代表Norrish二型引发基团;L代表二价连结基团,将Norrish二型引发基团A和CR2R3基团定位于1-5到1-9的位置,其中位置1定义为A芳香环或脂环中与L共价结合的第一个原子,位置5到9定义为CR2R3基团中与L共价结合的碳原子,但L不包含胺基。辐射可固化组合物和油墨包括该多功能二型光
引发剂。