High melt strength polypropylene and extrusion process for preserving melt strength

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United States of America Patent

PATENT NO 11414526
APP PUB NO 20170210859A1
SERIAL NO

15321594

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Abstract

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A method of melt blending a polypropylene and the melt blended polypropylene therefrom, comprising providing a base-polypropylene having a MFR of less than 15 g/10 min and a molecular weight distribution (Mw/Mn) within the range from 5 to 16, and comprising hindered phenol and phosphorous-type antioxidants, and within the range from 5 ppm to 4000 ppm of an alkyl radical scavenger relative to the total weight of the components to form a melt blended polypropylene; melt blending the melt blended polypropylene at a temperature of at least 210° C.; and isolating a melt blended, melt blended polypropylene.

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Patent Owner(s)

  • EXXONMOBIL CHEMICAL PATENTS INC.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
King, Roswell E Pleasantville, US 8 156
Pehlert, George J Houston, US 16 15
Zhao, Mosha H Houston, US 16 93

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