Chain transfer agents for raft polymerization in aqueous media

Details Chain transfer agents for raft polymerization in aqueous media Chain transfer agents for raft polymerization in aqueous media

2005-02-15

2005-02-15

Pezzuto, Helen L. (Department: 1713)

Organic compounds -- part of the class 532-570 series

Organic compounds

Esters having the thiocarboxylate group, -cx-, wherein the...

C526S193000, C526S217000, C526S220000, C526S222000, C526S225000

Reexamination Certificate

active

06855840

ABSTRACT:
Polymers and copolymers synthesized by means that yield a narrow range of molecular weights can have different properties than polymers synthesized by conventional means. In order to obtain such polymers, however, polymerization must be controlled. One type of controlled polymerization is the reversible addition-fragmentation chain transfer (RAFT) process, which has characteristics of a living polymerization. The present invention discloses a group of dithioesters and trithioesters suitable as chain transfer agents for RAFT polymerization. The present invention also discloses RAFT polymerizations conducted in aqueous media.

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