Novel dithioester chain transfer agents bearing hydrophilic moeity and its use in living free radical polymerization of vinyl monomer

摘要

The present invention provides novel vinyl-based polymer using dithio ester chain transfer agent , and it comprises a hydrophilic group relates to a living free-radical polymerization method , and more particularly, with a carboxylic acid or sulfonate dithio ester chain transfer agent of a new structure in which the hydrophilic functional group is bonded to the basic structure of the dithio acid ester , and the new chain transfer agent use added to the vinyl-based monomer , a free radical initiator and an emulsifying agent , a molecular weight distribution of the polymerization is a vinyl-based polymer particles (PDI) and narrow in the 1.0 to 2.0 , a vinyl-based polymer capable of long-term storage in particular the stability of the polymer particles is increased relates to a living free radical polymerization methods .