07344775 is referenced by 53 patents and cites 170 patents.

Fibers comprising a propylene homopolymer or a copolymer of propylene and at least one of ethylene and one or more unsaturated comonomers exhibit desirable properties. The homopolymers are characterized as having 13C NMR peaks corresponding to a regio-error at about 14.6 and about 15.7 ppm, the peaks of about equal intensity. The copolymers are characterized as (A) comprising at least about 60 weight percent (wt %) of units derived from propylene, and (B) having at least 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 (Z-N) catalyst.

Title
Isotactic propylene copolymer fibers, their preparation and use
Application Number
11/669342
Publication Number
7344775 (B2)
Application Date
January 31, 2007
Publication Date
March 18, 2008
Inventor
Samuel Ethiopia
Rosharon
TX, US
Daniel D Vanderlende
Sugar Land
TX, US
James C Stevens
Richmond
TX, US
Agent
Whyte Hirschboeck Dudek SC
Assignee
Dow Global Technologies
MI, US
IPC
C08F 210/06
D01F 6/30
View Original Source