申请人:Ciba Specialty Chemicals Corporation
公开号:US06673850B1
公开(公告)日:2004-01-06
Photoinitiators of formula (Ia) or (Ib) having chain transfer groups, wherein n is 1 or 2; PI is for example a group of formula (IIa); PI′ inter alia is a group of formula (IIIa); Ar is for example phenyl; Ar2 is inter alia phenylene; R1 and R2 are for example C1-C8alkyl, or R1 and R2 together C2-C9alkylene; M1 inter alia is —NR3R4 or —OH; M1′ is for example a group (c); R3′ is a direct bond, C1-C12alkylene, or phenylene; R3 is for example hydrogen, or C1-C12alkyl; R4 is e.g. C1-C12alkyl; A1 and A2 are for example a direct bond; CT is a chain transfer group; are useful for the preparation of macrophotoinitiators which can be employed for preparing block copolymers.
式(Ia)或(Ib)的光引发剂具有链转移基团,其中n为1或2;PI是例如式(IIa)的基团;PI'是例如式(IIIa)的基团;Ar例如为苯基;Ar2例如为苯基;R1和R2例如为C1-C8烷基,或R1和R2结合为C2-C9亚烷基;M1例如为—NR3R4或—OH;M1'例如为基团(c);R3'是直接键,C1-C12亚烷基或苯基;R3例如为氢或C1-C12烷基;R4例如为C1-C12烷基;A1和A2例如为直接键;CT为链转移基团。这些光引发剂可用于制备宏观光引发剂,后者可用于制备嵌段共聚物。