Patent ID: 8592532

Claim:
A method, comprising: (a) subjecting a cyclic iminoether compound represented by general formula (I): to ring opening polymerization in a solvent to prepare a solution of a terminal-reactive poly(N-acylalkylene imine), wherein R 1 is a hydrogen atom, an alkyl group having 1 to 22 carbon atoms, an aralkyl group or an aryl group, and n is a number of 2 or 3; (b) mixing a modified organopolysiloxane comprising an amino group bonded to a terminal end, to a side chain, or to a terminal end and a side chain of a molecular chain thereof with a solvent to prepare a solution of the modified organopolysiloxane; (c) mixing the terminal-reactive poly(N-acylalkylene imine) solution obtained from said subjecting with the modified organopolysiloxane solution obtained from said (b) mixing to react the amino group of the modified organopolysiloxane with the terminal-reactive poly(N-acylalkylene imine); (d) adding a basic substance to a reaction product obtained in said mixing (c) wherein the basic substance is at least one compound selected from the group consisting of an alkali metal hydroxide and an amine containing at least one hydrocarbon group substituted with a hydroxyl group; and (e) removing the solvents from a mixture obtained after the addition in said adding (d) at a temperature of from 100 to 200° C., thereby obtaining an organopolysiloxane compound having a structure in which a poly(N-acylalkylene imine) segment comprising a repeating unit represented by general formula (1): is bonded to a terminal end, a side chain, or a terminal end and a side chain of an organopolysiloxane segment, wherein R 1 is a hydrogen atom, an alkyl group having 1 to 22 carbon atoms, an aralkyl group or an aryl group, and n is a number of 2 or 3.