In the emulsion obtained by forcedly emulsifying by applying a high shearing force on the water insoluble liquid in the presence of a small amount of emulsifying agent, at least one of fluorine-containing monomers being in the form of gas at ordinary temperature at atmospheric pressure is emulsion-polymerized stably and efficiently. An amount of the emulsifying agent is an amount which does not change the number of water insoluble liquid particles in the emulsion during the polymerization.

En la emulsión obtenida forcedly emulsionando aplicando una alta fuerza que esquila en el líquido insoluble en agua en la presencia de una cantidad pequeña de agente emulsionando, por lo menos uno de monomers con flúor que están en la forma de gas en la temperatura ordinaria en la presión atmosférica emulsio'n-se polimeriza estable y eficientemente. Una cantidad del agente emulsionando es una cantidad que no cambia el número de partículas líquidas insolubles en agua en la emulsión durante la polimerización.

 
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