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.提供一種可於短時間作成高黏度之有機聚矽氧烷,八甲基環四矽氧烷(D4)的量為3000ppm以下之有機聚矽氧烷乳液組成物的製造方法。將包含下述之混合物乳化以式HO(R12SiO)nH(R1為氫原子或烴基)所表示,D4含量為1000ppm以下之有機聚矽氧烷100質量份非離子性界面活性劑、陰離子性界面活性劑,及水 1至10質量份所得乳液組成物於未達40℃的溫度進行乳化聚合,調製聚合時間15小時以內生成的有機聚矽氧烷的黏度成為30萬mPa‧s以上,且該有機聚矽氧烷所含D4的量為3000ppm以下之乳液組成物,製造有機聚矽氧烷乳液組成物的方法。
