Patent ID: 6121396
Filing Date: 2000-09-19
Classification: C07F,C08F,Y10S

Abstract:
A process for producing an olefin polymer or copolymer which comprises homopolymerizing ethylene or copolymerizing ethylene and an alpha-olefin of three or more carbon atoms at a polymerization temperature of not lower than 120.degree. C. using a catalyst which comprises a metallocene compound and a compound which reacts with the metallocene compound to form a cationic metallocene compound, wherein the metallocene compound is:a metallocene compound having a substituted fluorenyl group represented by General Formula (1):R.sup.1 (C.sub.5 H.sub.4)(C.sub.4 H.sub.4-m R.sup.2.sub.m C.sub.5 C.sub.4 H.sub.4-n R.sup.3.sub.n)M.sup.1 R.sup.4.sub.2 ( 1) ##STR5## where R.sup.1 is an aryl group-containing hydrocarbon arylalkylene group forming a bridge between the C.sub.5 H.sub.4 group and the C.sub.4 H.sub.4-m R.sup.2.sub.m C.sub.5 C.sub.4 H.sub.4-n R.sup.3.sub.n group to increase steric rigidity of the compound of General Formula (1); C.sub.5 H.sub.4 is a cyclopentadienyl group; (C.sub.4 H.sub.4-m R.sup.2.sub.m C.sub.5 C.sub.4 H.sub.4-n R.sup.3.sub.n) is a substituted fluorenyl group; R.sup.2 and R.sup.3 are independently a substituent on the benzo ring moiety of the substituted fluorenyl group, and are independently an amino group of 1 to 20 carbons or an alkoxy group of 1 to 20 carbons, M.sup.1 is Zr or Hf; each of R.sup.4 is independently a hydrogen atom, a hydrocarbon group, an amino group of 1 to 20 carbons, an oxygen-containing hydrocarbon group of 1 to 20 carbons, or a halogen; m is an integer of from 0 to 4; n is an integer of from 0 to 4; and the sum of m and n is one or more, wherein the substituted fluorenyl group is substituted at at least one of the 2- position, 4- position or the 7- position thereof, wherein the compound which reacts with the metallocene compound to form a cationic metallocene compound is an aluminoxane, a protonic acid, a Lewis acid, an ionizing ionic compound or a Lewis acidic compound, which compound which reacts with the metallocene compound to form a cationic metallocene compound yields a counter anion to the metallocene, wherein an organoaluminum compound is further present, wherein the amount of aluminoxane as methyl aluminoxane is 10-10,000 mol/mol of the metallocene compound, the amount of the organoaluminum compound is 1-1,000 mol/mol of the metallocene compound, and wherein the amount of the protonic acid, Lewis acid, ionizing ionic compound or Lewis acidic compound is from 0.1 to 100 mol/mol of the metallocene compound.