Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber
Reexamination Certificate
2006-07-25
2006-07-25
Gray, Jill (Department: 1774)
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Rod, strand, filament or fiber
C428S395000, C442S189000, C442S301000
Reexamination Certificate
active
07081299
ABSTRACT:
The present invention is a meltblown fiber and a fabric manufactured from the fiber comprising reactor grade polypropylene having a melt flow rate of from 100 to 5000 and having less than 50 stereo defects per 1000 units. Further, the polypropylene is typically produced from a metallocene catalyzed process, the metallocene being at least one bridged 2,4 di-substituted indenyl metallocene in one embodiment, and a bridged 4-phenyl indenyl metallocene in another embodiment. The metallocene is part of a system that can include a fluorided support and a non-coordinating anion activator.
REFERENCES:
patent: 3849241 (1974-11-01), Butin et al.
patent: 4340563 (1982-07-01), Appel et al.
patent: 4384095 (1983-05-01), Reed et al.
patent: 4384098 (1983-05-01), Hagler et al.
patent: 4430852 (1984-02-01), Hatcher
patent: 4451589 (1984-05-01), Morman et al.
patent: 4644045 (1987-02-01), Fowells
patent: 4797318 (1989-01-01), Brooker et al.
patent: 4818597 (1989-04-01), DaPonte et al.
patent: 4830987 (1989-05-01), Miller et al.
patent: 5026798 (1991-06-01), Canich
patent: 5078935 (1992-01-01), Kobayashi et al.
patent: 5188885 (1993-02-01), Timmons et al.
patent: 5213881 (1993-05-01), Timmons et al.
patent: 5240894 (1993-08-01), Burkhardt et al.
patent: 5271883 (1993-12-01), Timmons et al.
patent: 5583076 (1996-12-01), Yoshizawa et al.
patent: 5637666 (1997-06-01), Winter et al.
patent: 5643847 (1997-07-01), Walzer
patent: 5723217 (1998-03-01), Stahl et al.
patent: 5726103 (1998-03-01), Stahl et al.
patent: 5736465 (1998-04-01), Stahl et al.
patent: 5763080 (1998-06-01), Stahl et al.
patent: 5891814 (1999-04-01), Richeson et al.
patent: 5972823 (1999-10-01), Walzer
patent: 5994482 (1999-11-01), Georgellis et al.
patent: 6010588 (2000-01-01), Stahl et al.
patent: 6143686 (2000-11-01), Vizzini et al.
patent: 6143911 (2000-11-01), Fujita et al.
patent: 6207600 (2001-03-01), Nakajima et al.
patent: 6235664 (2001-05-01), Georgellis et al.
patent: 6467172 (2002-10-01), Jenq
patent: 6639020 (2003-10-01), Brant
patent: 2003/0130422 (2003-07-01), Brant
patent: 2004/0028903 (2004-02-01), Richeson
patent: 2004/0034170 (2004-02-01), Brant
patent: 2004/0038022 (2004-02-01), Maugans et al.
patent: 0 628 574 (1994-12-01), None
patent: 0 513 380 (1997-10-01), None
patent: 0 905 290 (1999-03-01), None
patent: 94/28219 (1994-12-01), None
patent: 98/23799 (1998-06-01), None
patent: 99/19547 (1999-04-01), None
patent: 99/58587 (1999-11-01), None
patent: 00/12565 (2000-03-01), None
Yang et al. “Cation-like” Homogeneous Olefin Polymerization Catalysts Based upon Zirconocene Alkyls and Tris(pentafluorophenyl)borane, J. Am. Chem.Soc., 1991, 113, pp. 3623-3625.
Chien et al., Isospecific Polymerization of Propylene Catalyzed by rac-Ethylenebis(indenyl)methylzirconium “Cation”, J. Am. Chem. Soc., 1991, 113, pp. 8570-8571.
Yang et al., “Cationic Zirconocene Olefin Polymerization Catalysts Based on the Organo-Lewis Acid Tris(pentafluorophenyl)borane. A Synthetic, Structural, Solutuion Dynamic, and Polymerization Catalytic Study”, J. Am. Chem. Soc., 1994, 116, pp. 10015-10031.
Herfert et al., “Ethylene and Propene Polymerization with the Catalyst System Me2Si[lnd]2ZrMe2/[Bu3NH][B(C6F5)4]: a kinetic study”, Makromol. Chem. Rapid Commun. (1993) 14, pp. 91-96.
Bochmann et al., “Base-Free Cationic Zirconium Benzyl Complexes as Highly Active Polymerization Catalysts”, Organometallics, 1993, 12, pp. 663-640.
Lin et al., “Assessment of Metallocene Propylene Polymers for Cast Film Applications”, ANTEC 2000, May 7-11, 2000, Orlando, Florida, Conference Proceedings, Vol. 1 ˜ Processing.
ExxonMobil Chemical Patents Inc.
Faulkner Kevin M.
Gray Jill
LandOfFree
Polypropylene fibers and fabrics does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Polypropylene fibers and fabrics, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polypropylene fibers and fabrics will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3525152