| Patent application number | Description | Published |
|---|
| 20080214854 | Production of isotactic and regiorandom polypropylene based polymer and block copolymers - One step ortho-alkylation of anilines with styrenes to give chiral anilines is obtained using a strong acid catalyst, e.g. CF | 09-04-2008 |
| 20080262164 | Isotactic specific catalyst for direct production of highly isotactic poly (propylene oxide) or highly isotactic poly (butylene oxide) - (Salph or methoxy salph) Co (initiating ligand) catalyze homopolymerizing rac-PO to produce pure highly isotactic PPO and rac-1-butylene oxide to produce pure isotactic poly(butylene oxide). A product is unfractionated isotactic PPO of m-dyad content >81%, normally at least 99%. | 10-23-2008 |
| 20090192278 | Alkene polymerization using beta-ketoiminato metal complexes - Group (IV) and (X) metal complexes with ketoiminate ligands are prepared by deprotonation of a ketoimine ligand followed by reaction with the appropriate metal halide. In preferred cases, the compounds are titanium (IV), zirconium (IV) and hafnium (IV), preferred cases, the compounds are titanium (IV), zirconium (IV) and hafnium (IV) complexes with (arylimino-alkyl)-spiro[4,5]decan-6-one ligands. The compounds are useful as catalysts for polymerizing ethylene, C | 07-30-2009 |
| 20090287000 | LOW PRESSURE CARBONYLATION OF HETEROCYCLES - Heterocycles, e.g., epoxides, are carbonylated at low pressure with high percentage conversion to cyclic, ring expanded products using the catalyst | 11-19-2009 |
| 20100029882 | Production of isotactic and regiorandom polypropylene based polymer and block copolymers - One step ortho-alkylation of anilines with styrenes to give chiral anilines is obtained using a strong acid catalyst, e.g. CF | 02-04-2010 |
| 20100036077 | Regioregular polymerization of alpha-olefins to produce polyethylene with a predominance of methyl substituents - Regioregular polymers of C | 02-11-2010 |
| 20100063213 | GEL-PROCESSED POLYOLEFIN COMPOSITIONS - Semicrystalline polyolefins with narrow molecular weight distributions characterized by a low polydispersity index (PDI) and selected from the families of homopolymers, statistical copolymers, block copolymers, and graft copolymers, can be blended with a low molecular weight fluid diluent to create gel fiber and film compositions. These gel compositions, when subjected to mechanical or thermomechanical processing, either before or after removal of the diluent, result in fiber or film compositions that combine high tensile strength with other desirable physical properties, such as high rigidity, large extension at break, and/or high recoverable elasticity. These desirable combinations of properties are superior to those obtained from gel-processed semicrystalline polyolefins that are substantially similar in composition and molecular weight, but that have large PDIs. | 03-11-2010 |
| 20110152497 | CATALYSTS AND METHODS FOR POLYMER SYNTHESIS - The present invention provides unimolecular metal complexes having increased activity in the copolymerization of carbon dioxide and epoxides. Also provided are methods of using such metal complexes in the synthesis of polymers. According to one aspect, the present invention provides metal complexes comprising an activating species with co-catalytic activity tethered to a multidentate ligand that is coordinated to the active metal center of the complex. | 06-23-2011 |
