Patent ID: 7300648

Claim:
A method of preparing a polyorganosiloxane emulsion composition including (A) 100 parts by weight of a polyorganosiloxane, (B) 1 to 100 parts of a material selected from the group consisting of (i) an N-acylalkyl taurine and (ii) a salt of N-acylalkyl taurine having the general formula: R 3 —CO—NR 4 —C 2 H 4 —SO 3 M, wherein R 3 and R 4 are non-substituted monovalent hydrocarbons, and M is selected from the group consisting of the hydrogen atom, an alkali metal, ammonium, and triethanol ammonium, and (C) 30 to 1000 parts of water, said method comprising the step of: subjecting (a) a polyorganosiloxane with a molecular weight lower than that of component (A) to emulsion and condensation polymerization in water in the presence of component (B).