Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2011-05-10
2011-05-10
Wu, David (Department: 1762)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C526S090000, C526S351000
Reexamination Certificate
active
07939610
ABSTRACT:
Provided are methods of producing polymers with broadened molecular weight and/or composition distribution in a continuous homogeneous polymerization system utilizing reactor temperature gradients, reactor polymer concentration gradients, monomer concentration gradients, catalyst concentration gradients, and combinations thereof in the polymerization reactor. Such methods are particularly suitable when utilizing metallocene catalysts and other single-site catalysts, which generally produce polymers with narrow molecular weight and composition distribution.
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Brant Patrick
Chu John W.
Kiss Gabor
Lattner James Richardson
Reynolds, Jr. Robert Patrick
Eng Elizabeth
ExxonMobil Research and Engineering Company
Migliorini Robert A.
Wu David
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