| 摘要 |
<p>A method for producing an organopolysiloxane emulsion composition, which enables the organopolysiloxane to be formed with a high viscosity in a short period of time, and suppresses the amount of octamethylcyclotetrasiloxane (D4) to not more than 3,000 ppm. Specifically, a method for producing an organopolysiloxane emulsion which includes emulsifying a mixture containing 100 parts by mass of an organopolysiloxane represented by formula: HO(R 1 2 SiO) n H (wherein R 1 represents a hydrogen atom or a hydrocarbon group) and having a D4 content of not more than 1,000 ppm, a nonionic surfactant, an anionic surfactant, and 1 to 10 parts by mass of water, and subjecting the obtained emulsion composition to emulsion polymerization at a temperature of less than 40°C, thus preparing an emulsion composition in which the viscosity of the organopolysiloxane generated in a polymerization time of not more than 15 hours is 300,000 mPa·s or greater, and the amount of D4 contained in the organopolysiloxane is not more than 3,000 ppm.</p> |
