Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymerizing in two or more physically distinct zones
Reexamination Certificate
2006-01-17
2008-09-09
Rábago, Roberto (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymerizing in two or more physically distinct zones
C526S160000, C526S161000, C526S172000, C526S905000, C525S053000, C525S191000, C525S240000
Reexamination Certificate
active
07423098
ABSTRACT:
An ethylene polymerization process is disclosed. Ethylene is polymerized in two slurry reaction zones with a C6-C10alpha-olefin in the presence of a single-site catalyst capable of making a high molecular weight polyolefin. The process yields medium density and linear low density polyethylene having a bimodal molecular weight distribution and a melt index from about 0.10 to about 0.80. Films from the polyethylene have superior impact properties.
REFERENCES:
patent: 4357448 (1982-11-01), Tsubaki et al.
patent: 6211311 (2001-04-01), Wang et al.
patent: 6232260 (2001-05-01), Nagy et al.
patent: 6323149 (2001-11-01), Takemori et al.
patent: 6451724 (2002-09-01), Nifant'ev et al.
patent: 6486270 (2002-11-01), Garrison et al.
patent: 6552150 (2003-04-01), Nummila-Pakarinen et al.
patent: 6559251 (2003-05-01), Wang et al.
patent: 6566450 (2003-05-01), Debras et al.
patent: 6693155 (2004-02-01), Meverden et al.
patent: 6759361 (2004-07-01), Lynch et al.
patent: 6794468 (2004-09-01), Wang
patent: 6818713 (2004-11-01), Wang et al.
patent: 6838410 (2005-01-01), Wang et al.
patent: 2001/0014724 (2001-08-01), Promel et al.
patent: 2002/0065368 (2002-05-01), Debras et al.
patent: 2004/0192861 (2004-09-01), Mutchler et al.
patent: 1 195 388 (2000-10-01), None
patent: 2 051 833 (1981-01-01), None
patent: WO 99/24446 (1999-05-01), None
patent: WO 01/53360 (2001-07-01), None
Jüngling et al.,J. Organometal, Chem.460 (1993) 191.
Noh et al.,J. Organometal. Chem.518 (1996) 1.
Noh et al.,J. Organometal. Chem.580 (1999) 90.
Clark James R.
Cribbs Leonard V.
Etherton Bradley P.
Garrison Philip J.
Holland Charles S.
Equistar Chemicals LP
Rábago Roberto
Schuschardt Jonathan L.
Tyrell John
LandOfFree
Polyethylene process does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Polyethylene process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polyethylene process will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3986732