Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2007-06-07
2011-11-29
Jagannathan, Vasu (Department: 1764)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C526S183000, C526S185000, C526S188000, C526S190000, C526S192000, C526S226000, C526S348100, C526S348200, C526S348600, C526S943000
Reexamination Certificate
active
08067518
ABSTRACT:
Ethylene alpha-olefin copolymers formed by contacting at least one supported metallocene catalyst, ethylene, and an alpha-olefin in a gas phase reactor are disclosed. In some embodiments, the polymer may have: a density of between 0.890 and 0.970 g/cc; a melt index of between 0.7 and 200 dg/min; a melt index ratio of less than 30; an ESCR value of greater than 1000 hours; and a 1% secant modulus of greater than 75,000 psi. In other embodiments, the polymer may have: a density of between 0.930 g/cc and 0.970 g/cc; a melt index of between 10 dg/min and 200 dg/min; a melt index ratio of between 10 and 25; a part weight of greater than 3 g and a part length of greater than 38 cm in a spiral flow test, and; a zero shear viscosity of less than 150 Pa·s. Processes to produce these polymers are also disclosed.
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Davey Christopher R.
Farley James M.
Kolb Rainer
Ossowski Mark P.
Huhn Richard A
Jagannathan Vasu
Univation Technologies LLC
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