HIGH-MOLECULAR-WEIGHT POLYMERIZATION INITIATOR AND PRODUCTION METHOD FOR HIGH-MOLECULAR-WEIGHT POLYMERIZATION INITIATOR

摘要

The present invention is a high-molecular-weight polymerization initiator that is represented by formula (I). (I) M¹_aM²_bD¹_cD²_dT¹_eT²_fQ_g, wherein M¹=R¹₃SiO_1/2, M²=R¹₂R²SiO_1/2, D¹=R¹₂SiO_2/2, D²=R¹R²SiO_2/2, T¹=R¹SiO_3/2, T²=R²SiO_3/2, and Q=SiO_4/2 (R¹ being a hydrogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group, R² being a group that has a ketene silyl acetal structure that is represented by formula (II) (A being a single bond or a bivalent organic group, R³ being a hydrogen atom or a substituted or unsubstituted alkyl group, and R⁴ being a substituted or unsubstituted alkyl group), a, b, c, d, e, f, and g being 0 or a positive integer, provided that b+d+f≥1, and the bond order of the siloxane units being arbitrary). The present invention thereby provides: a high-molecular-weight polymerization initiator that is for obtaining a (meth)acrylic graft silicone by group transfer polymerization; and a production method for said high-molecular-weight polymerization initiator.