Amelia C Gonzalez

US Patent:

20080114142, May 15, 2008

Filed:

Nov 8, 2007

Appl. No.:

11/936908

Inventors:

Jennifer L. Hicks - Bartlesville OK, US
William R. Bridendolph - Ochelata OK, US
Donald E. Allen - Bartlesville OK, US
Kenichiro Yada - Chiba Pref., JP
Amelia L. Gonzalez - Houston TX, US

Assignee:

PHILLIPS SUMIKA POLYPROPYLENE COMPANY - The Woodlands TX

International Classification:

C08F 10/06

US Classification:

526348

Abstract:

An ethylene-propylene copolymer having a cold xylene solubles weight percent greater than twice the magnitude of the ethylene content wherein the ethylene content is measured by C13-NMR and having less than about 30% of the cold xylene solubles fraction having a log weight average chain length of less than about 1000 wherein the weight average chain length is measured by gel permeation chromatography. A method of producing a copolymer comprising contacting comonomers with a catalyst system in a reaction zone under conditions suitable for the formation of a copolymer wherein the catalyst system comprises at least two external donors and wherein the copolymer has a cold xylene solubles weight percent greater than twice the magnitude of the ethylene content wherein the ethylene content is measure by C13-NMR and having less than about 30% of the cold xylene solubles fraction having a log weight average chain length of less than about 1000 wherein the weight average chain length is measured by gel permeation chromatography.