Method of making an olefin polymerization catalyst activator

Patent metadata

Field	Value
Publication number	US-10730964-B2
Application number	US-201815923780-A
Country	US
Kind code	B2
Filing date	Mar 16, 2018
Priority date	Jul 31, 2012
Publication date	Aug 4, 2020
Grant date	Aug 4, 2020

Abstract

A method for preparing ammonium tetrakis(pentafluorophenyl)borate salt comprising reacting a secondary amine with an aldehyde to form an iminium ion; hydrogenating the iminium ion by reaction with a reducing agent to form a tertiary amine; reacting the tertiary amine with a mineral acid to form an amine salt; and reacting the amine salt with K[B(C6F5)4], Li[B(C6F5)4], or combinations thereof to form an ammonium tetrakis(pentafluorophenyl)borate salt, wherein the secondary amine is derived from a non-animal source and the aldehyde has seven or more carbon atoms; wherein the ammonium tetrakis(pentafluorophenyl)borate salt is characterized by a solubility at 25° C. in hexane, cyclohexane or methylcyclohexane of at least 10 weight percent; and wherein the tertiary amine has a molecular weight of at least 450 g/mole is provided.

First claim

We claim:

1. A catalyst composition comprising an ammonium tetrakis(pentafluorophenyl)borate salt, wherein the ammonium cation of the ammonium tetrakis(pentafluorophenyl) borate salt comprises a protonated tertiary amine having the formula R 3 R 4 N(H)R 1 where R 1 is an alkyl having 7 carbon atoms; and R 3 and R 4 independently are alkyl groups having from 8 to 22 carbon atoms;
wherein the ammonium tetrakis(pentafluorophenyl)borate salt is characterized by a solubility at 25° C. in hexane, cyclohexane or methylcyclohexane of at least 20 weight percent.

2. A polymerization process comprising contacting one or more a-olefins under polymerization conditions with a catalyst composition according to claim 1 .

3. The process according to claim 1 , which is a solution polymerization.

4. The process according to claim 1 , which is a continuous solution polymerization.

5. The catalyst composition according to claim 1 , wherein the tertiary ammine of the protonated tertiary amine is plant based.

6. The catalyst composition according to claim 1 , wherein R 1 is a linear alkyl.

Assignees

• Dow Global Technologies Llc
• Dow GlobalTechnologies LLC

Inventors

• Sun Lixin
• Vanderlende Daniel D

Classifications

• C07F5/027 Primary

  Organoboranes and organoborohydrides · CPC title

• C07F5/02

  Boron compounds · CPC title

• C08F10/00

  Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond · CPC title

• C08F2/04

  Polymerisation in solution (C08F2/32 takes precedence) · CPC title

• C08F4/52 Primary

  selected from boron, aluminium, gallium, indium, thallium or rare earths (C08F4/14 takes precedence) · CPC title