HOMOGENEOUS OLEFIN POLYMERIZATION CATALYST BY ABSTRACTION WITH LEWIS ACIDS

摘要

ADDITION POLYMERIZATION CATALYSTS HAVING A LIMITING CHARGE SEPARATED STRUCTURE CORRESPONDING TO THE FORMULA:LMX + XA-, WHEREIN;L IS DERIVATIVE OF A SUBSTITUTED DELOCALIZED N-BONDED GROUP IMPARTING A CONSTRAINED GEOMETRY TO THE METAL ACTIVE SITE AND CONTAINING UP TO 50 NONHYDROGEN ATOMS;M IS A METAL OF GROUP 4 OR THE LANTHANIDE SERIES OF THE PERIODIC TABLE OF THE ELEMENTS;X INDEPENDENTLY EACH OCCURRENCE IS HYDRIDE OR A HYDROCARBYL, SILYL OR GERMYL GROUP HAVING UP TO 20 CARBON, SILICON OR GERMANIUM ATOMS; ANDA- IS AN ANION OF A LEWIS ACID, A, HAVING RELATIVE LEWIS ACIDITY GREATER THAN OR EQUAL TO THAT OF PHENYLBIS(PERFLUOROPHENYL)BORANE, SAID ANION BEING COMPATIBLE WITH THE METAL CATION,ARE PREPARED BY CONTACTING A DERIVATIVE OF A GROUP 4 OR LANTHANIDE METAL CORRESPONDING TO THE FORMULA:LMX2, WHEREINL, M, AND X ARE AS PREVIOUSLY DEFINED,WITH THE LEWIS ACID, A.