PROCESO PARA LA PREPARACION DE POLIMEROS DE CICLOOLEFINAS

LA INVENCION SE REFIERE A POLIMERIZADO DE OLEFINAS POLICICLICAS DE LAS FORMULAS I HASTA IV CON UN INDICE DE VISCOSIDAD MAYOR DE 20 CM3/G Y UNA TEMPERATURA DE TRANSICION VITRIOSA POR ENCIMA DE 100 NA ALTA VELOCIDAD DE POLIMERIZACION EN TEMPERATURAS DE POLIMERIZACION TECNICAMENTE ADECUADAS POR MEDIO DE UN CATALIZADOR, QUE SE COMPONE DE UN COMPUESTO METALOCENO ESTEREORIGIDO, QUIRAL, DE LOS GRUPOS IVB HASTA VIB DEL SISTEMA PERIODICO DE ELEMENTOS Y UN ALUMINOXANO. The prodn. of cycloolefin polymers (COC) comprises the polymerisation of (a) 0.1-100 wt.% monomer(s) of formula (I), (II), (III) or (IV), (b) 0-99.9 wt.% cycloolefin of formula (V) and (c) acyclic 1-olefin(s) of formula (VI), at -78 to +150 degrees C and 0.5-64 bar in soln., suspension, monomer melt or gas phase, in the presence of a catalyst consisting of a metallocene component of formula (IX) and linear and/or cyclic aluminoxane(s) of formula (VII) and/or (VIII). R -R = H or 1-8 C alkyl; n = 2-10; R = 1-6 C alkyl, Ph or benzyl; m = 2-50; M = Ti, Zr, Hf, V, Nb or Ta; R , R = H, halo, 1-10 C alkyl or alkoxy, 2-10 C alkenyl, 6-10 C aryl or aryloxy, 7-40 C aralkyl or alkaryl, or 8-40 C aralkenyl; R , R = mono- or poly-nuclear hydrocarbon residue which can form a sandwich structure with M ; R = -X-, -X-M R R -, -X-C(R )2-, -CR R -, -O-X-, -CR R -CR R - or -BR -; X = -M R R -; M = Si, Ge or Sn; R -R = H, halo, 1-10 C alkyl, fluoroalkyl or alkoxy, 6-10 C aryl or fluoroalkyl, 2-10 C alkenyl, 7-40 C aralkyl or alkaryl, or 8-40 C aralkenyl; or R +R or R +R or R +R may form a ring with their linking atom. Also claimed are COC polymers obtd. by this process, esp. with a content of more than 40 mole% norbornene units. Also claimed are extruded parts, injection moulded prods. and polymer alloys contg. the above COC polymer(s).