Patent ID: 6573352
Filing Date: 2003-06-03
Classification: C08F,C08L

Abstract:
A long chain, branched propylene homopolymer that is produced only from propylene monomer, wherein(a) 1) a ratio of MI5/MI2.16, MI5 being a melt index of the polymer in g/10 min as measured at 230Â° C. under a load of 5.0 kg, and MI2.16 being a melt index of the polymer in g/10 min as measured at 230Â° C. under a load of 2.16 kg, and 2) a ratio of Mw/Mn, Mw being a weight-average molecular weight of the polymer and Mn being a number-average molecular weight of the polymer both measured by gel permeation chromatography, satisfy the following requirement: MI5/MI2.16&gE;0.240Ã—Mw/Mn+3.1â€ƒâ€ƒ(I); and(b) a melt tension, MS(g), of the polymer as measured at 230Â° C. and a limiting viscosity (&eegr;) of the polymer as measured in tetracycline at 135Â° C. satisfy the following requirement: log MS&gE;3.17Ã—log(&eegr;)âˆ’0.68â€ƒâ€ƒ(II); wherein the ratio of Mw/Mn is 1.5 to 4.5 and the limiting viscosity (&eegr;) is 0.1 to 15.0 dl/g.