Abstract: A liquid-phase process for polymerizing ?-olefins of the formula CH2?CHR, where R is H or an alkyl radical C1-C6, to produce a polymer that is soluble in the reaction medium, comprising the steps of: a) continuously polymerizing in liquid phase the ?-olefin in the presence of a catalyst system based on a transition metal compound; b) continuously withdrawing from step a) a solution of polymer in the liquid reaction medium; c) mixing in one or more mixing stages said solution of polymer in the reaction medium with an organic deactivator having: at least a hydroxy group, a boiling point higher than 150° C., and a ratio between the molecular weight (MW) and the number of hydroxy groups (OH) comprised between 20 and 100.
Type:
Application
Filed:
June 17, 2003
Publication date:
November 10, 2005
Applicant:
DANIELE BIGIAVI, GABRIELE MEI, NICOLO' ARICH DE FINETTI
Inventors:
Daniele Bigiavi, Gabriele Mei, Nicolo Arich De Finetti, Giuseppe Penzo, Gianni Vitale, Massimo Covezzi