Patent ID: 7462669

Claim:
A method for preparing a cationic emulsion composition comprising the steps of dispersing components (D),(E),(B) and (C) to form an emulsion, allowing the emulsion to polymerize in the presence of an alkali catalyst at 0 to 90° C. for 10 to 150 hours, and neutralizing with an acidic compound, (D) 100 parts by weight of a cyclic organosiloxane of the general formula: [R 2 SiO] x wherein R is each independently a monovalent organic group of 1 to 20 carbon atoms and x is a positive number of 3 to 20 and/or a hydroxy-terminated polydiorganosiloxane of the general formula: HO—[R 2 SiO] y —H wherein R is as defined above and y is a positive number of 2 to 100, (E) 0 to 20 parts by weight of an organoalkoxysilane of the general formula: (YO) 2 SiR 2 wherein Y is an alkyl group of 1 to 6 carbon atoms and R is as defined above, (B) 0.1 to 30 parts by weight of a cationic surfactant of the general formula: Q 3 (CH 3 )N + ·X − wherein Q is each independently a monovalent organic group of 6 to 30 carbon atoms selected from the group consisting of alkyl, aryl and alkenyl groups, and X is a halogen atom or monovalent carboxyl group of 1 to 6 carbon atoms, and (C) 30 to 3,000 parts by weight of water, thereby obtaining the cationic emulsion composition comprising (A) 100 parts by weight of a polydiorganosiloxane of the general formula: HO—[R 2 SiO] n —H wherein R is each independently a monovalent organic group of 1 to 20 carbon atoms and n is a positive number, having a viscosity of at least 300,000 mPa-s at 25° C., (B) 0.1 to 30 parts by weight of a cationic surfactant of the general formula: Q 3 (CH 3 )N + ·X − wherein Q is each independently a monovalent organic group of 6 to 30 carbon atoms selected from the group consisting of alkyl, aryl and alkenyl groups, and X is a halogen atom or monovalent carboxyl group of 1 to 6 carbon atoms, and (C) 30 to 3,000 parts by weight of water.