06960635 is referenced by 109 patents and cites 147 patents.

Unique copolymers comprising propylene, ethylene and/or one or more unsaturated comonomers are characterized as having: at least one, preferably more than one, of the following properties: (i) 13C NMR peaks corresponding to a regio-error at about 14.6 and about 15.7 ppm, the peaks of about equal intensity, (ii) a B-value greater than about 1.4 when the comonomer content of the copolymer is at least about 3 wt %, (iii) a skewness index, Six, greater than about −1.20, (iv) a DSC curve with a Tme that remains essentially the same and a Tmax that decreases as the amount of comonomer in the copolymer is increased, and (v) an X-ray diffraction pattern that reports more gamma-form crystals than a comparable copolymer prepared with a Ziegler-Natta catalyst. These polypropylene polymers are made using a nonmetallocene, metal-centered, heteroaryl ligand catalyst. These polymers can be blended with other polymers, and are useful in the manufacture of films, sheets, foams, fibers and molded articles.

Title
Isotactic propylene copolymers, their preparation and use
Application Number
10/139786
Publication Number
6960635 (B2)
Application Date
May 5, 2002
Publication Date
November 1, 2005
Inventor
Daniel D Vanderlende
Sugarland
TX, US
James C Stevens
Richmond
TX, US
Agent
Whyte Hirschboeck Dudek SC
Assignee
Dow Global Technologies
MI, US
IPC
C08F 010/00
C08F 004/00
C08F 010/02
C08F 004/42
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