| abstract |
A compound useful as a catalyst activator corresponding to the formula: n n n (A* +a ) b (Z*J* j ) −c d , n n n wherein: n A* is a cation of charge +a, n Z* is an anion group of from 1 to 50 atoms not counting hydrogen atoms, further containing two or more Lewis base sites; n J* independently each occurrence is a Lewis acid coordinated to at least one Lewis base site of Z*, and optionally two or more such J* groups may be joined together in a moiety having multiple Lewis acidic functionality, n j is a number from 2 to 12 and n a, b, c, and d are integers from 1 to 3, with the proviso that a×b is equal to c×d. |