Process for the microencapsulation of water-emulsifiable non-thermoplastic substances

摘要

The invention relates to a process for the preparation of microcapsulated flakes or powders by drying aqueous mixtures containing (a) one or more water-emulsifiable, non-thermoplastic compounds which have a higher boiling point than waterand (b) at least one water-soluble, film-forming polymer, in which the content of component (a) is up to about 95% by weight, based on the dry weight of components (a) and (b), with the proviso that the water-soluble, film-forming polymer has a flocculation point of from 20 DEG to 98 DEG C. or the flocculation point is adjusted to from 20 DEG to 98 DEG C. with the aid of additives, and drying is carried out by thin-layer drying in a temperature range above the flocculation point.