Masterbatch method for economically and efficiently producing soap dispersions in textile fluids for synthetic fiber treatment

A method of masterbatching comprising the steps of first making a dispersion consisting of a solid salt of a fatty acid in a liquid as a concentrated mixture containing at least 50 percent of the solid salt of the fatty acid in the liquid, secondly subjecting the concentrated mixture to shearing force until the average particle size of the solid salt of the fatty acid in the liquid is less than 3 micron, and then after a desired reduction in particle size of the solid salt of the fatty acid in the liquid has been obtained, then thirdly diluting die concentrated mixture with the liquid to a lower concentration containing 1-50 percent of the solid salt of the fatty acid in the liquid, the liquid being a polysiloxane polymer having the formula:

• where a has a value sufficient to provide the polysiloxane polymer with a viscosity in the range of about 1-100 centistoke (mm2/sec), and R1-R8 are alkyl groups containing 1-6 carbon atoms or aryl groups, and where the solid salt of the fatty acid is selected from the group consisting of sodium palmitate, sodium stearate, potassium stearate, magnesium stearate, potassium palmitate, potassium myristate, sodium myristate, calcium stearate, calcium jaunt;
• and zinc stearate.