Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2006-09-26
2006-09-26
Lu, Caixia (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C526S106000, C526S348200, C526S348000
Reexamination Certificate
active
07112643
ABSTRACT:
Methods of producing a polymer include contacting at least one olefin with a catalyst prepared by contacting a support comprising alumina with a sulfating agent and with chromium. Polymer compositions produced in this manner may exhibit relatively low levels of long chain branching and relatively high molecular weights. In an embodiment, polymer compositions with a PDI in a range of from about 6 to about 15 have MWvalues greater than about 300,000 g/mol and Eovalues less than about 1×106Pa·s. The polymer compositions may further have Theological breadths greater than about 0.25 and relaxation times less than about 10 seconds.
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Benham Elizabeth A.
Collins Kathy S.
DesLauriers Paul J.
McDaniel Max P.
Carroll Rodney B.
Chevron Phillips Chemical Company LP
Conley & Rose, P.C.
Huseman Cheryl L.
Lu Caixia
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