Patent ID: 7960305

Claim:
A polymerization catalyst composition for a radically polymerizable monomer comprising a transition metal-containing phosphazenium composition obtained by mixing a phosphazenium compound represented by the following general formula (1) with at least one kind of compound of a transition metal belonging to Group 4 to Group 12 in the periodic table represented by the following general formula (2), (wherein in the formula, n is an integer of 1 or more and represents the number of phosphazenium cations and Z n− represents an anion of an active hydrogen compound in a form derived from an active hydrogen compound having n active hydrogen atoms, from which n protons are eliminated; a, b, c and d are each a positive integer of 3 or less or 0 with the proviso that they are not all 0 simultaneously; R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , R 10 , R 11 , R 12 , R 13 , R 14 , R 15 , R 16 , R 17 and R 18 , R 19 , R 20 , R 21 , R 22 , R 23 and R 24 may be identical or different and each represent a hydrocarbon group having 1 to 10 carbon atoms; R 1 and R 2 , R 3 and R 4 , R 5 and R 6 , R 7 and R 8 , R 9 and R 10 , R 11 and R 12 , R 13 and R 14 , R 15 and R 16 , R 17 and R 18 , R 19 and R 20 , R 21 and R 22 , R 23 and R 24 may be linked together to form a ring); L p M m+ (X r− ) q (2) (wherein in the formula, L represents a neutral ligand, p represents the number of neutral ligands and is 0 or an integer of from 1 to 8; M represents a transition metal belonging to Group 4 to Group 12 in the periodic table, m represents the valency of transition metal M and is an integer of from 1 to 8; X r− represents an anion in a form derived from deprotonation of an active hydrogen compound, q represents the number of anions and is an integer of from 1 to 8; r represents the valency of the anion and is an integer of from 1 to 8; and the relationship among m, r and q is represented by m=r×q), and an organic halogen compound.