Microcapsules, their preparation and their use in photosensitive material.

摘要

Microcapsules are prepared by dispersing a hydrophobic oily liquid in a continuous aqueous phase. The hydrophobic oily liquid contains a pre-wall former and a chain extender. The chain extender is a polyhydric compound which is capable of reacting with the pre-wall former at a rate such that the chain extender does not substantially react with the pre-wall former prior to dispersing the hydrophobic oily liquid in the continuous aqueous phase. Capsule walls are formed around the droplets of hydrophobic oily liquid in the continuous aqueous phase.