Patent ID: 6100352
Filing Date: 2000-08-08
Classification: C08F,Y10S

Abstract:
A method of producing a polymer, comprising:preparing a catalyst comprising (a) a titanium compound (i) of the formula: TiRXYZ, wherein R is a cyclopentadienyl group, a substituted cylcopentadienyl group, an indenyl group, a substituted indenyl group or a fluorenyl group and X, Y and Z are each independently hydrogen, a C.sub.1 -C.sub.20 -alkyl group, a C.sub.1 -C.sub.20 -alkoxy group, a C.sub.6 -C.sub.20 -alkyl group, an alkylaryl group, an arylalkyl group, a C.sub.6 -C.sub.20 -aryloxy group, a C.sub.1 -C.sub.20 -acyloxy group, a C.sub.1 -C.sub.50 -amino group, an amide group, a phosphide group, an alkylthio group, an arylthio group or halogen or X, Y or Z is cross-linked to R by CH.sub.2 or SiR.sub.2, wherein R.sub.2 is C.sub.1 -C.sub.8 -alkyl; or a compound (ii) of the formula: R'TiX'.sub.3 L.sup.1.sub.q, wherein R' is a .pi. ligand and is a condensed polycyclic cyclopentadienyl group in which at least one many membered ring having a cyclopentadienyl group bound to it by condensation is a saturated ring; each of the three X' groups is a .sigma. ligand, which may be the same or different; L.sup.1 is a Lewis base and q is 0, 1 or 2; and(1) a borate compound which is capable of reacting with component (a) to form an ionic complex selected from the group consisting of triethylammonium tetraphenylborate, tri(n-butyl)ammonium tetraphenylborate, trimethylammonium tetraphenylborate, triethylammonium tetrakis(pentafluorophenyl)borate, tri(n-butyl)ammonium tetrakis(pentafluorophenyl)borate, triethylammonium hexafluoroarsenate, pyridium tetrakis(pentafluorophenyl)borate, pyrrolinium tetra(pentafluorophenyl)borate, N,N-dimethylanilinium tetrakis(pentafluorophenyl)borate, methyldiphenylammonium tetrakis(pentafluorophenyl)borate, ferrocenium tetraphenylborate, dimethylferrocenium tetrakis(pentafluorophenyl)borate, ferrocenium tetrakis(pentafluorophenyl)borate, decamethylferrocenium tetrakis(pentafluorophenyl)borate, acetylferrocenium tetrakis(pentafluorophenyl)borate, formylferrocenium tetrakis(pentafluorophenyl)borate, cyanofeirocenium tetrakis(pentafluorophenyl)borate, silver tetraphenylborate, silver tetrakis(pentafluorophenyl)borate, trityl tetraphenylborate and trityl tetrakis(pentafluorophenyl)borate;mixing said catalyst with at least one aromatic vinyl compound monomer and which monomer has previously been mixed with a component (c) which is at least one oxygen-containing aluminoxane compound selected from the group consisting of tetraisopropylaluminoxane, tetraisobutylaluminoxane, tetra-t-butylaluminoxane, pentaisobutylaluminoxane, penta-t-butylaluminoxane, hexaisobutylaluminoxane, hexa-t-butylaluminoxane, heptaisobutylaluminoxane, hepta-t-butylaluminoxane, octaisobutylaluminoxane, octa-t-butylaluminoxane, nonaisobutylaluminoxane, nona-t-butylaluminoxane, decaisobutylaluminoxane, and deca-t-butylaluminoxane, wherein the molar ratio of said monomer to aluminoxane ranges from 350,000:1000 to 350,000:1; andpolymerizing the monomer(s).