Scalable production of precision hydrocarbons from trialkylaluminum via ternary living coordinative chain transfer polymerization

摘要

Disclosed is a method of producing a polyolefin composition comprising contacting a metallocene pre-catalyst, a co-catalyst, a primary surrogate, and a secondary surrogate; adding a first olefin monomer; and polymerizing the first monomer for a time sufficient to form the polyolefin. Also disclosed is a method of producing a block polyolefin composition comprising contacting a metallocene pre-catalyst, a co-catalyst, a primary surrogate, and a secondary surrogate; polymerizing the first monomer for a time sufficient to form the polyolefin; adding a second monomer; and polymerizing the second olefin monomer for a time sufficient to form said block polyolefin composition. The method allows for the production of polyolefins of low molecular weights and narrow molecular weight distributions.

主权项

1. A method of producing a polyolefin composition comprising:
(a) contacting a metallocene pre-catalyst, a co-catalyst, of Al(R8)3, wherein R8 is a C1-C10 alkyl, and Zn(R9)2, wherein R9 is a C1-C10 alkyl; (b) adding a first olefin monomer; and (c) polymerizing by ternary living coordinative chain transfer said first olefin monomer for a time sufficient to form said polyolefin, wherein Al(R8)3 and Zn(R9)2 are added in a ratio of about 1.1:1 to about 100:1.