Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2003-07-23
2010-10-19
Nutter, Nathan M (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C525S240000
Reexamination Certificate
active
07816452
ABSTRACT:
The present invention relates to a process for preparing propylene polymer compositions in at least two-stage process wherein, in a first stage, a propylene homopolymer or a propylene copolymer comprising propylene and at least a CZ-CIO-1-alkenes other than propylene, containing at least 85% by weight of propylene, is prepared by polymerization and, in a second stage, ethylene and at least a comonomer selected from propylene and C4-C,o1alkenes are polymerized to give an ethylene polymer, comprising at least 90% by weight of ethylene, wherein the amount of the ethylene polymer in the propylene polymer composition ranges from 10 to 50% by weight and the propylene polymer composition has a melt flow rate MFR, in accordance with ISO 1133 at 230° C. and 2.16 kg, of from 2 to 50 g/10 min.
REFERENCES:
patent: 4454299 (1984-06-01), Schweier et al.
patent: 4734459 (1988-03-01), Cecchin et al.
patent: 4857613 (1989-08-01), Zolk et al.
patent: 5280074 (1994-01-01), Schreck et al.
patent: 5288824 (1994-02-01), Kerth et al.
patent: 5648422 (1997-07-01), Collina et al.
patent: 6028140 (2000-02-01), Collina et al.
patent: 6174969 (2001-01-01), Kersting et al.
patent: 6593442 (2003-07-01), Bidell et al.
patent: 7196140 (2007-03-01), Dahn et al.
patent: 2002/0019488 (2002-02-01), Seelert et al.
patent: 195 29 240 (1997-02-01), None
patent: 0045975 (1982-02-01), None
patent: 0045977 (1982-02-01), None
patent: 0086473 (1983-08-01), None
patent: 0171200 (1986-02-01), None
patent: 433990 (1991-06-01), None
patent: 603723 (1994-06-01), None
patent: 704463 (1996-04-01), None
patent: 792914 (1997-09-01), None
patent: 889064 (1999-01-01), None
patent: 918068 (1999-05-01), None
patent: 0976785 (2000-02-01), None
patent: 1110976 (2001-06-01), None
patent: 1211289 (2002-06-01), None
patent: 2111066 (1983-06-01), None
patent: 96/11218 (1996-04-01), None
patent: 0119915 (2001-03-01), None
patent: WO 01/19915 (2001-03-01), None
B. Monrabal, “Crystallization Analysis Fractionation: A New Technique for the Analysis of Branching Distribution in Polyolefins,”Journal of Applied Polymer Science, vol. 52, p. 491-499 (1994).
Bidell Wolfgang
Dahn Ulrich Clemens
Roesch Joachim
Schweier Guenther
Zimmermann Hans-Jürgen
Basell Poliolifine Italia s.r.l.
Nutter Nathan M
Raphael Jarrod N.
Reid William R.
LandOfFree
At least two-stage process for preparing propylene polymer... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with At least two-stage process for preparing propylene polymer..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and At least two-stage process for preparing propylene polymer... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4180628