Zwitterionic catalyst activator

US6344529B1 · kind B1 · utility

Assignee

• THE DOW CHEMICAL COMPANY · US

Inventors

• Edmund M. Carnahan · Fresno, US
• Grant Berent Jacobsen · Houston, US
• Jerzy Klosin · Midland, US
• Peter N. Nickias · Midland, US
• David J. Schwartz · Lake Jackson, US
• David R. Neithamer · Midland, US

Key dates

• Filing date: Dec 6, 1999
• Grant date: Feb 5, 2002
• Expiry date: Dec 6, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F4/65922
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Disclosed are compounds useful as catalyst activators for olefin polymerization, comprising structures of the following formulae: wherein:L+ is a protonated derivative of an element of Group 15 of the Periodic Table of the Elements, additionally bearing two hydrocarbyl substituents of from 1 to 50 carbons each, or a positively charged derivative of an element of Group 14 of the Periodic Table of the Elements, said Group 14 element being substituted with three hydrocarbyl substituents of from 1 to 50 carbons each;R1 is a divalent linking group of from 1 to 40 non-hydrogen atoms;R2 independently each occurrence is a ligand group of from 1 to 50 nonhydrogen atoms with the proviso that in a sufficient number of occurrences to balance charge in the compound, R2 is L+—R1—;M1 is boron, aluminum or gallium;Arf independently each occurrence is a monovalent, fluorinated organic group containing from 6 to 100 non-hydrogen atoms;Y is a Group 15 element; andZ is a Group 14 element.