Unique family of trianionic ligand precursors provide unprecedented control over polymer properties
Project ID: D2009-89IP Status: U.S. Utility Patent #8,524,846 Invention Description: These trianionic ligand precursors are useful in making proprietary constrained geometry complexes (CGCs) that can potentially function as single-site homogeneous and heterogeneous catalysts. These catalysts could include metals such as niobium, titanium, zirconium, molybdenum, chromium, palladium, platinum or other transition metals. In addition, the invention provides methods to make and use trianionic CGCs in various applications, including polymerizations, alkene oligomerizations, alkene metathesis reactions, and hydroamination reactions.Novelty: A unique family of trianionic constrained geometry ligands that can be developed for a variety of catalytic reactions. These ligands have been demonstrated to bind to metal allow precise and previously unprecedented control over polymer properties, including tacticity and molecular weight. Applications: Production of polymers and chemical precursors for automotive exterior and interior applications, wire and cable, extruded and molded goods, film applications, medical goods, adhesives, footwear, foams, and pharmaceutical intermediates. Value proposition: Advantages over existing strategies include:• Organic compounds (ligands) that bind to metal are highly desirable for tailoring the activity and selectivity of the resulting catalysts. • Previously unknown ligands with potential applications for constrained geometry catalysts (CGC) for more effective metathesis reactions, hydroamination of alkenes, and oligomerization and polymerization of alkenes, epoxides, cyclic ethers, lactones, and other monomers• Technology results in formation of a six-membered chelate ring and a substantially unique coordination environment in comparison to other CGCs.
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