| abstract |
Polymeric compositions of matter are described comprising olefin polymer chains having M n of about 400 to 75,000, a ratio of vinyl groups to total olefin groups according to the formula n vinyl groups olefin groups ≥ [ comonomer mole percentage + 0.1 ] a × 10 a × b ( 1 ) n n where, a=−0.24 and b=0.8, and where the total number of vinyl groups per 1000 carbon atoms is greater than or equal to 8000÷M n . The invention includes a method for preparing these polymeric products comprising contacting one or more olefin comonomers with a catalyst system containing a transition metal catalyst compound and an alumoxane wherein the aluminum to transition metal ratio is from 10:1 to less than or equal to 220:1 (AL:Me). The process conditions of the invention permit predictable macromer characteristics of both molecular weight and vinyl unsaturation. |