Combined internal donor system for Ziegler-Natta polyolefin catalysts and methods of making and using same

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United States of America Patent

PATENT NO 9738736
SERIAL NO

14457571

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Abstract

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Solid catalyst components are disclosed including titanium, magnesium, halogen and an internal electron donor compound having a combination of internal electron donor compounds including at least one 1,8-naphthyl diester and at least one secondary internal donor compound selected from alkyl 2-alkoxy-1-naphthoates, alkyl 2-alkoxybenzoates, alkyl 2,6-dialkoxybenzoates, (2-alkoxyphenyl)(pyrrolidin-1-yl)alkanones, dialkyl phthalates, alkyl alkionates, and dialkyl cyclohexane-1,2-dicarboxylates, and catalyst systems containing the catalyst solid components, organoaluminum compounds, and organosilicon compounds. Further, methods of making the catalyst components and the catalyst systems are disclosed as well as methods of polymerizing or copolymerizing alpha-olefins using the catalyst systems.

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Patent Owner(s)

  • W. R. GRACE & CO.-CONN.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chang, Main Houston, US 50 1776
Hintolay, Ahmed Houston, US 9 8
Marin, Vladimir P Houston, US 23 39
Nguyen, Binh Thanh League City, US 36 61
O'Reilly, Neil Seabrook, US 3 13

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