Patent ID: 6329477
Filing Date: 2001-12-11
Classification: C08F

Abstract:
A method of making a blend comprising a terpolymer of ethylene, higher alpha-olefin, and non-conjugated diene which comprises:(a) feeding solvent and a first set of monomers comprising ethylene, a C.sub.3 to C.sub.8 alpha-olefin, and a diene in predetermined proportions to a first continuous flow stirred tank reactor;(b) adding a metallocene catalyst to the first reactor;(c) operating the first reactor to polymerize the first set of monomers to produce an effluent containing a first copolymer;(d) feeding the effluent of (c) to a second continuous flow stirred tank reactor;(e) feeding a second set of monomers comprising ethylene and a C.sub.3 to C.sub.8 aipha-olefin in predetermined proportions to the second reactor; and(f) operating the second reactor to polymerize the second set of monomers and any unreacted monomers to produce a second copolymer;wherein 50-100 wt % of the total amount of catalyst added to all reactors is added to the first reactor.