Konjüge/eslenik dienlerin (Ko) polimerizasyonu için lantanid bazli katalitik kompleksler

摘要

Complexes of lanthanides are described, which are effective in the polymerization of conjugated dienes, obtained by reacting LnX3 with at least one Lithium compound selected from: (i) Li(A), the molar ratio Li(A)/LnX3 being from 1.5 to 2.5; (ii) LiLn(A)4, the molar ratio between LiLn(A)4 and LnX3 being from 0.5 to 1.5; wherein Ln is selected from any of the Lanthanides; X is selected from halides, carboxylates, alcoholates, -N(Rx) (Ry) wherein Rx and Ry, the same or different, are C1-C5 alkyl radicals; A is an allyl radical having the general formula CHEM wherein R1, R2, R3, R4 and R5, the same or different, are selected from hydrogen and C1-C10 alkyl radicals.