Patent Number: 6,294,631

Title: Hyperbranched polymers by coordination polymerization

Abstract: Hyperbranched copolymers comprising at least one C.sub.2 -C.sub.20 .alpha.-monoolefin monomers and 0.2 to 20 mole % of at least one .alpha.,.omega.-non-conjugated diene monomers having 5 to 18 carbon atoms are prepared by coordination (metallocene) copolymerization of the monomers and quenching the reaction prior to the formation of a gelled product. The building blocks of the products are characterized by a number average molecular weight less than 5 times the entanglement molecular weight of a homopolymer prepared using the same catalyst but in the absence of the diene component.

Inventors: Brant; Patrick (Seabrook, TX)

Assignee: ExxonMobil Chemical Patents Inc.

International Classification: C08F 210/06 (20060101); C08F 210/00 (20060101); C08F 210/14 (20060101); C08F 012/34 (); C08F 004/42 ()

Expiration Date: 09/25/2018