The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 31, 2012
Filed:
Dec. 15, 2009
Carlos U. DE Gracia, La Porte, TX (US);
Kevin R. Squire, Kingwood, TX (US);
Peijun Jiang, League City, TX (US);
Armenag H. Dekmezian, Austin, TX (US);
Beverly J. Poole, Houston, TX (US);
Cesar A. Garcia-franco, Houston, TX (US);
Carlos U. De Gracia, La Porte, TX (US);
Kevin R. Squire, Kingwood, TX (US);
Peijun Jiang, League City, TX (US);
Armenag H. Dekmezian, Austin, TX (US);
Beverly J. Poole, Houston, TX (US);
Cesar A. Garcia-Franco, Houston, TX (US);
ExxonMobil Chemical Patents Inc., Houston, TX (US);
Abstract
An in-reactor polymer blend comprises (a) a propylene-containing first polymer; and (b) an ethylene-containing second polymer such that the polymer blend comprises between about 50 wt % and about 80 wt % units derived from ethylene and between about 50 wt % and about 20 wt % units derived from propylene. The blend is substantially free of dienes and the content of ethylene in the second polymer in the form of ethylene-ethylene-ethylene triads is at least 40%. The second polymer contains at least 0.1 branch having 8 or more carbon atoms per 10,000 carbons. In addition, the blend has a strain hardening index of at least 1.8, a shear thinning slope in the plot of log(dynamic viscosity) versus log(frequency) of less than −0.2 and exhibits at least two peaks when subjected to Differential Scanning Calorimetry (first melt) corresponding to a first melting point of at least 150° C. and a second melting point of at least 40° C. such that the difference between the first and second melting temperatures is at least 20° C.