Issues in the discovery and commercialization of new homogeneous polyolefin catalysts

INOR 445

James C. Stevens, Polyolefins & Elastomers R&D, The Dow Chemical Company, 2301 N. Brazosport, B-3827, Freeport, TX 77541
In the last decade, The Dow Chemical Company has discovered and commercialized a significant number of new polyolefin products. Many of these new materials were enabled through the discovery of new organometallic-based homogeneous catalysts. The commercial growth of some of these polymers has been significant, with sales of over 1 million metric tons per year. An example of a recently commercialized product is our VERSIFYƒx Plastomers and Elastomers, based on a high-throughput discovery of a novel catalyst capable of producing highly isotactic polypropylene in a high temperature solution process. These catalysts were discovered using a fully integrated high-throughput screening methodology, in a joint research program between The Dow Chemical Company and Symyx Technologies. These pro-catalysts are highly active for the isotactic polymerization of 1-alkenes, and for copolymerization of 1-alkenes with ethene. The utility and potential applications of the polymers will be discussed, along with polymer microstructure and catalyst mechanistic details.