Supported catalysts for manufacture of polymers
A supported catalyst composition and process for preparing high molecular weight polymers of one or more addition polymerizable monomers, especially propylene, said composition comprising: 1) a substrate comprising the reaction product of a solid, particulated, high surface area, metal oxide, metalloid oxide, or a mixture thereof and an organoaluminum compound, 2) a Group 4 metal complex of a polyvalent, Lewis base ligand; and optionally, 3) an activating cocatalyst for the metal complex.
1. A supported, heterogeneous catalyst composition for use in polymerization of addition polymerizable monomers, comprising:
1) a substrate comprising the reaction product of a solid, particulated, high surface area, metal oxide, metalloid oxide, or a mixture thereof and an organoaluminum compound,
2) a Group 4 metal complex of a polyvalent, Lewis base ligand selected from the group consisting of:
wherein X each occurrence is halide, N,N-dimethylamido, or C 1-4 alkyl; and optionally,
3) an activating cocatalyst for the metal complex.
2. A process for preparing high molecular weight polymers of one or more addition polymerizable monomers comprising contacting said one or more addition polymerizable monomers under addition polymerization conditions with a catalyst composition according to claim 1 .
3. A process according to claim 2 wherein propylene is homopolymerized.
4. A process according to claim 2 , wherein propylene and ethylene in an amount from 0.001 to 10 percent of the total monomer weight are copolymerized.
5. A polypropylene made by the process of claim 3 .
6. A polypropylene of claim 5 , having a molecular weight distribution of at least 4.
7. A polypropylene of claim 5 , having a molecular weight distribution of at least 5.
8. A polypropylene of claim 6 , exhibiting an isothermal crystallization half time of less than 1 minute at 120° C.
9. A propylene copolymer made by the process of claim 4 .
10. The copolymer of claim 9 , having a molecular weight distribution of at least 4.
11. The copolymer of claim 9 , having a molecular weight distribution of at least 5.
12. The copolymer of claim 9 , characterized by a 13 C NMR spectrum containing peaks corresponding to a regio-error at about 14.6 and about 15.7 ppm, wherein the peaks are of about equal intensity.