The slow-stirring method (OECD Test Guideline 123) was followed which minimises turbulence and thereby enhances the exchange betweenn-octanol and water without microdroplets being formed. The water phase (lower phase) is sampled from a stopcock at the bottom of the vessel, whereas then-octanol ph...
In the acetone process to reduce the viscosity, the first step takes place in a low boiling point solvent (usually acetone) while in the prepolymer process the viscosity is controlled by reducing the molecular weight of the polyurethane. In the second step, in both methodologies water is added...