Microencapsulation melamine-formaldehyde in aqueous solutions containing high concentrations of organic solvent.

摘要

ARISE TO DEVELOP A melamine-formaldehyde microcapsule solution process containing aqueous HIGH CONCENTRATION ORGANIC SOLVENT HYDRO-miscible or HIDROSOLUBLE. AQUEOUS SOLUTION is prepared and dissolved therein precondensed melamine-formaldehyde ADJUSTING THE TEMPERATURE AND CONCENTRATION OF ORGANIC SOLVENT AQUEOUS SOLUTION SO THE SEA precondensed melamine-formaldehyde JUST THE SAME SOLUBLE. Disperses a substance to be encapsulated, preferably a solution OILY CONTAINING A DYE PRECURSOR IN THE SOLUTION AQUEOUS to form an emulsion, with the precondensed melamine-formaldehyde insoluble in the substance to be encapsulated. MELAMINE-FORMALDEHYDE precondensed is separated from the aqueous solution in drops of the solution to be encapsulated and the reaction self-condensation and melamine-formaldehyde pre-condensed phase separated BEGUN TO FORM WALLS CAPSULE AROUND THE DROP, producing microcapsules MELAMINA formaldehyde in the solution containing aqueous high concentration of an organic solvent HYDRO-miscible or HIDROSOLUBLE.