MIT EINEM AMINOPLAST MIKROVERKAPSELTE FESTSTOFFE UND VERFAHREN ZU DEREN HERSTELLUNG

NOVELTY - Solid particles micro-encapsulated with aminoplastic resin, in which the resin is the condensation product of partly etherated amino-resin precondensates, at least one component of which shows a high surface activity due to co-condensation with an ethoxylated fatty amine, so that the micro-particles are evenly encapsulated even at exposed points. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for the quasi-continuous production of micro-encapsulated particles as above by: (a) introducing the solid particles into a reactor in which an acid-catalysed polycondensation of at least two amino-resin precondensates is carried out in the aqueous phase; (b) post-curing the polymer in a larger receiver with facilities for continuous removal of the aqueous medium; (c) separating the micro-encapsulated particles from the mother liquor and drying the micro-capsules and (d) working up the mother liquor and recycling it to the process. USE - For the production of micro-encapsulated metal particles, metal oxide particles and crystalline substances (claimed). Applications include substances such as metal flakes, titanium dioxide and other metal oxides, dyes, marker inks, magnetisable particles etc. for use in a wide range of industries. ADVANTAGE - Enables the quasi-continuous production of micro-encapsulated solid particles with very good homogeneity and uniformity (with regard to capsule wall thickness), without the disadvantages associated with prior-art processes, such as clumping, agglomeration and the formation of aggregates.