Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2007-02-20
2007-02-20
Pezzuto, Helen L. (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C526S193000, C526S217000, C526S220000, C526S225000, C526S303100, C524S555000
Reexamination Certificate
active
11057760
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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Donovan Michael S.
Lowe Andrew B.
McCormick Charles L.
Sumerlin Brent S.
Thomas David B.
Howrey LLP
Pezzuto Helen L.
University of Southern Mississippi
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