CATALYST SYSTEM AND COMPONENTS

摘要

Provided are organosilane compounds having structure (I), wherein R1 and R2 are the same or different and are selected from the group consisting of alkyl radicals, cycloalkyl radicals, and polynuclear radicals, said polynuclear radicals having nine or more carbon atoms, wherein at least one of R1 or R2 is a polynuclear radical of nine or more carbon atoms, with the proviso that where either R1 or R2 is indenyl or fluorenyl, the other of R1 or R2 is a substituted or unsubstituted bridged cyclic aliphatic radical or is a polynuclear aromatic radical of ten or more carbon atoms and wherein Ry and Rz are the same or different and each Ry and Rz are selected from alkyl radicals having one or two carbon atoms. In a preferred variation, R1 is a polynuclear aromatic radical having ten or more carbon atoms, and R2, Ry and Rz are the same or different and each R2, Ry and Rz are selected from alkyl radicals having one or two carbon atoms. Also provided are organosilanes having structure (II), wherein R1 is a polynuclear aromatic radical having ten or more carbon atoms, and wherein Rx, Ry et Rz are the same or different and each Rx, Ry and Rz are selected from alkyl radicals having one or two carbon atoms. Such organosilanes are provided for use as modifiers for olefin polymerization catalyst systems. Polymers of propylene are provided which have a crystallinity melt temperature exceeding 164 DEG C, percent crystallinities exceeding 55 % as measured by DSC ( DELTA Hf=212J/g pour 100 %) and a molecular weight distribution of from 5 to 10.