Manufacture of polyethylenes

Details Manufacture of polyethylenes Manufacture of polyethylenes

2005-07-26

2005-07-26

Rabago, Roberto (Department: 1713)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C526S113000, C526S114000, C526S118000, C526S119000, C526S115000, C526S117000

Reexamination Certificate

active

06921795

ABSTRACT:
Blends of two or more polyethylenes are made by reacting ethylene with an oligomerization catalyst that forms α-olefins, and two polymerization catalysts, one of which under the process conditions copolymerizes ethylene and α-olefins, and the other of which under process conditions does not readily copolymerize ethylene and α-olefins. The blends may have improved physical properties and/or processing characteristics.

REFERENCES:
patent: 5071927 (1991-12-01), Benham et al.
patent: 5137994 (1992-08-01), Goode et al.
patent: 5587501 (1996-12-01), Winter et al.
patent: 5686542 (1997-11-01), Ostoja-Starzewski et al.
patent: 5753785 (1998-05-01), Reddy et al.
patent: 5856610 (1999-01-01), Tamura et al.
patent: 6214761 (2001-04-01), Bennett
patent: 2003/0055176 (2003-03-01), Jacobsen et al.
patent: WO 90/15085 (1990-12-01), None
patent: WO 97/48735 (1997-12-01), None
patent: WO 99/50318 (1999-10-01), None
S. Mecking, Macromol. Rapid Commun. 20 (1999) pp. 139-143.
Denger, et al.,Simultaneous oligomerization and polymerization of ethylene, Makromol. Chem., Rapid Commun., 1991, p. 697-701, vol. 12.
Benham, E. A. et al.,A Process for the Simultaneous Oligomerization and Copolymerization of Ethylene, Polymer Engeineering and Science, 1988, p. 1469-1472, vol. 28, No. 22.
Mecking, S., Reactor blending with early/late transition metal catalyst combinations in ethylene polymerization, Macromol. Rapid Commun., 1999, p. 139-143, vol. 20, No. 3.
International Search Report PCT/US00/26643 dated Sep. 28, 2000.

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