Patent ID: 6638887
Filing Date: 2003-10-28
Classification: C07F,C08F,C08L,Y10S

Abstract:
A catalyst system comprising the compound and an activator, wherein said compound is represented by the formula: wherein: M is Zr, Hf, or Ti;T is selected from Si or Ge; each of R1 and R2 are independently selected from C1-C20 hydrocarbyl radicals; each R3 is independently selected from hydrogen; C1-C20 alkyl; C3-C20 cycloalkyl; C6-C22 aryl; halogen; amido; phosphido; alkoxy; borido; and the like radicals; or combinations thereof; u is an integer of from 0 to 6; each R4 is independently selected from hydrogen; halogen, C1-C10 alkyl; C3-C10 cycloalkyl; C6-C22 aryl; amido; alkoxy; aryloxy or combinations thereof and the like radicals, or two R groups along with the carbon atom or atoms to which they are attached, form a saturated or partially saturated alicyclic group or form an aryl group; each Q is independently selected from halide, hydride, substituted or unsubstituted C1-C20 hydrocarbyl radicals; alkoxide; amide; and phosphide radicals, with the proviso that Q is not a substituted or unsubstituted cyclopentadienyl radical; L is a neutral Lewis base which is optionally covalently bonded to one or both Q; w is a number from 0 to 3; and x is an integer of from 0 to 4.