| abstract |
The invention relates to a process for the preparation of emulsions of the oil-in-water type, comprising a water phase and an oil phase, which is composed essentially of low volatility constituents, containing at least one oil-in-water emulsifier and optionally a W / O Emulsifier and at least one crosslinker and, if appropriate, auxiliaries, additives and / or active substances, i) obtainable in such a way that the water phase with its constituents is added to the oil phase with its components, the O / W emulsifier and optionally the W / O emulsifier, and wherein one or more cross-linking agents in the water phase or the oil phase or in both phases, which results in an increase in viscosity and gives crosslinked O / W emulsions, j) obtainable by bringing the mixture to a temperature within or outside the phase inversion temperature range and thereafter cooling to room temperature to give an increase in viscosity and to obtain crosslinked O / W emulsions, k) or obtainable in that the crosslinker is subsequently added to a low-viscosity O / W emulsion and a crosslinked O / W emulsion is obtained. |