heating in the presence of a strongly alkaline catalyst as exemplified by potassium hydroxide sodium hydroxide and tetramethylammonium hydroxide to obtain a liquid amino group containing organopolysiloxane followed by neutralization and removal of the alkaline used as a catalyst thereafter low boiling substances are removed if necessary to obtain an oily product and then said oily product is dispersed in water with use of a suitable nonionic and or cationic emulsifying agent s this is hereinafter referred to as method 1 examples of the nonionic emulsifying agent and cationic emulsifying agent used in the above method 1 may include those exemplified in regard to the preparation of the aqueous dispersion of component a in the present method 1 the aqueous dispersion can be adjusted to have the ph in the range of from 3 to 7 by using formic acid acetic acid glycolic acid hydrochloric acid or the like to make stable the resulting aqueous dispersion and make mild the basicity of the amino group containing organopolysiloxane another method for preparing the aqueous dispersion containing the component b amino group containing organopolysiloxane includes a method in which for example octamethylcyclotetra siloxane an aminoalkoxysilane represented by the formula str8 and or hydrolysis condensation products thereof and a siloxane optionally added having a trimethylsilyl group such as hexamethyldisiloxane are dispersed in water in the presence of a cationic emulsifying agent and a nonionic emulsifying agent and thereafter a suitable amount of a strongly alkaline catalytic material is added followed by heating to obtain a desired aqueous dispersion.