Patent ID: 6706828
Filing Date: 2004-03-16
Classification: C08F,C10M,C10N,Y10S

Abstract:
A process for the preparation of a poly(&agr;-olefin) polymer comprising polymerizing at least one &agr;-olefin in the presence of hydrogen and a catalytically effective amount of catalyst to form a substantially amorphous polymer possessing a Mw of from about 500 to about 50,000, a Mw/Mn of from about 1.0 to about 10, a Kv100 of from about 10 to about 10,000, an iodine number of from about 0.0 to about 10, and a Tg of below about âˆ’60Â° C., wherein the catalyst comprises the product obtained by combining a metallocene catalyst with a cocatalyst, the metallocene catalyst being at least one meso compound of general formula: wherein:A1 and A2 are independently selected from the group consisting of mononuclear and polynuclear hydrocarbons; M1 is a metal from group IVb, Vb, or VIb of the Periodic Table; R1 and R2 are independently selected from the group consisting of hydrogen, C1-C10 alkyl, C1-C10 alkoxy, C6-C10 aryl, C6-C10 aryloxy, C2-C10 alkenyl, C7-C40 arylalkyl, C7-C40 alkylaryl, C8-C40 arylalkenyl and halogen; R7 is selected from the group consisting of: &boxH;BR11, &boxH;AlR11, â€”Geâ€”, â€”Snâ€”, â€”Oâ€”, â€”Sâ€”, &boxH;SO, &boxH;SO2, &boxH;NR11, &boxH;CO, &boxH;PR11 and &boxH;P(0)R11, whereR11, R12, and R13 are independently selected from the group consisting of hydrogen, halogen, â€”C1-C10 alkyl, C1-C10 fluoroalkyl, C6-C10 aryl, C6-C10 fluoroaryl, C1-C10 alkoxy, C2-C10 alkenyl, C7-C40 arylalkyl, C8-C40 arylalkenyl, and C7-C40 alkylaryl, or, alternatively, R11 can be combined with R12 or R11 can be combined with R13, in each case with the atoms connecting them, to form a ring; and M2 is selected from the group consisting of silicon, germanium, and tin; R8 and R9 are independently selected from the group consisting of hydrogen, halogen, C1-C10 alkyl, C1-C10 fluoroalkyl, C6-C10 aryl, C6-C10 fluoroaryl, C1-C10 alkoxy, C2-C10 alkenyl, C7-C40 arylalkyl, C8-C40 arylalkenyl, and C7-C40 alkylaryl; m and n are identical or different and are zero, 1, or 2, with m plus n being zero, 1 or 2.