Patent ID: 6579956
Filing Date: 2003-06-17
Classification: C08F

Abstract:
A method for producing a polymer by coordination polymerization, comprising the steps of:reacting an unsaturated polar monomer having a functional group releasing a proton or a salt of said unsaturated polar monomer, with a masking agent comprising an organometallic compound of the general formula (I) capable of masking said functional group to form a corresponding masked monomer; Rnâ€”Mâ€”Xmâ€ƒâ€ƒ(I) wherein M is a metal selected from the group consisting of Li, Mg, Ca, Sc, Ti, V, Cr, Fe, Ni, Cu, Zn, Co, Al, Si, Y, Zr, Rh, Pd, In, Sn, Sm, and Hf; R is a ligand represented by a compound or an ionic moiety thereof selected from the group consisting of an unsaturated cyclic hydrocarbon, an unsaturated cyclic hydrocarbon having hydroxyl group, an unsaturated heterocyclic hydrocarbon and an unsaturated heterocyclic hydrocarbon having hydroxyl group; X represents a halogen atom; n is an integer of 1 to 5; m is an integer of 1 to 3; â€œn+mâ€  is an integer of 2 to 6; further wherein R may be the same or different when n is an integer of 2 to 5; and polymerizing said masked monomer either alone or in combination with another monomer in the presence of the coordination polymerization catalyst to obtain the polymer.