Patent ID: 8748522

Claim:
A process for the polymerization of at least one α-olefin under solution polymerization conditions comprising the steps of: (a) polymerizing said at least one α-olefin in a solution phase in the presence of a polymerization catalyst to produce a polymeric solution; (b) deactivating the polymeric solution by conveying the polymeric solution to a deactivation tank, wherein a catalyst deactivator is mixed with the polymeric solution to produce a deactivated polymeric solution comprising the catalyst deactivator, a produced polyolefin, and unreacted monomers; and (c) devolatilizing the deactivated polymeric solution by separating the produced polyolefin from the unreacted monomers in a first devolatilization chamber and a second devolatilization chamber; adding 300 to 2000 ppm by weight of an antioxidant with respect to the polyolefin produced in step (a) to said polymeric solution, or inside of the first devolatilization chamber of step (c).