Olefins are polymerized by novel transition metal complexes of selected iminocarboxylate and iminoamido ligands, sometimes in the presence of cocatalysts such as alkylaluminum compounds or neutral Lewis acids. Olefins which may be (co)polymerized include ethylene, a-olefins, and olefins containing polar groups such as olefinic esters for example acrylate esters. Also described are certain "Zwitterionic" transition metal complexes as polymerization catalysts for making polar copolymers. The resulting polymers are useful as thermoplastics and elastomers.
申请公布号
WO0192348(A3)
申请公布日期
2002.07.25
申请号
WO2001US17636
申请日期
2001.05.31
申请人
E.I. DU PONT DE NEMOURS AND COMPANY;WANG, LIN;JOHNSON, LYNDA, K.;IONKIN, ALEX, S.