Patent ID: 7241848

Claim:
A process for preparing a low molecular weight olefin (co)polymer having a molecular distribution (Mw/Mn) of 3 or smaller measured by gel permeation chromatography (GPC), comprising homopolymerizing or copolymerizing an olefin in which ethylene is used as a main monomer, and in a temperature range of 100° to 250° C., in the presence of an olefin polymerization catalyst comprising: (A) a Group 4 transition metal compound represented by the following formula (1), and (B) at least one compound selected from the group consisting of (B-1) an organometallic compound, (B-2) an organoaluminum compound, (B-3) an organoaluminum oxy-compound, and (B-4) a compound that reacts with the Group 4 transition metal compound (A) to form an ion pair; wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , R 10 , R 11 , R 12 , R 13 , and R 14 are independently selected from the group consisting of hydrogen, a hydrocarbon group, and a silicon-containing group, and are the same or different; and each adjacent pair of substituents R 1 to R 14 may be taken together to form a ring, M is Ti, Zr or Hf; Y is a Group 14 atom; each Q is independently selected from the group consisting of: a halogen, a hydrocarbon group, a neutral conjugated or non-conjugated diene having 10 or fewer carbon atoms, an anionic ligand, and a neutral ligand that can be coordinated with a lone electron pair; n is an integer of from 2 to 4; and j is an integer of from 1 to 4; wherein an intrinsic viscosity [η] of the low molecular weight olefin (co)polymer measured in decalin at 135° C. is 0.6 dl/g or less.