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