Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2006-12-12
2006-12-12
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...
C526S073000, C526S079000, C526S140000, C526S319000, C526S329100, C526S346000
Reexamination Certificate
active
07148297
ABSTRACT:
This invention relates to a process for controlling the architecture of copolymers of at least two unsaturated monomers, made by free-radical polymerization in the presence of a cobalt-containing chain transfer agent, including the control of molecular weight, degree of branching and vinyl end group termination, by varying at least one of the variables of molar ratio of monomers, their relative chain transfer constants, polymerization temperature and degree of conversion and amount of cobalt chain transfer agent; and polymers made thereby.
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Gridnev Alexei A
Ittel Steven Dale
Moad Catherine
Moad Graeme
Rizzardo Ezio
Commonwealth Scientific and Industrial Research Organisation
Deshmukh Sudhir G.
E. I. du Pont de Nemours and Company
Pezzuto Helen L.
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