Process for the encapsulation of substances which are finely distributed in a liquid and capsule compositions produced thereby

Abstract

Abstract AN ENCAPSULATION PROCESS IS PROVIDED WHEREIN THE SUBSTANCES TO BE ENCAPSULATED ARE DISPERSED IN A DISTRIBUTION MEDIUM IN THE PRESENCE OF A REACTIVE TENSIDE WHICH IS CAPABLE TO FORM A COMPOUND INSOLUBLE IN THE DISTRIBUTION MEDIUM. THE DISPERSED REACTIVE TENSIDE IS CONVERTED TO THE IRREVERSIBLE, INSOLUBLE STATE FORMING A PRIMARY CAPSULE SUSPENSION AND THEN MIXED WITH AN AMINOPLAST PRECONDENSATE SOLUTION TO FORM A SECONDARY SUSPENSION OF CAPSULES HAVING STRENGTHENED WALLS. THE REACTIVE TENSIDE AND THE AMINOPLAST PRECONDENSATE ALSO MAY BE ADDED TOGETHER AND CONVERTED TO THE IRREVERSIBLY INSOLUBLE STATE AT THE SAME TIME. THE CAPSULES ARE USEFUL TO ENCAPSULATE MOST DIVERSE ACTIVE SUBSTANCES, SUCH AS SOLVENTS, DYESTUFFS, PIGMENTS OR PESTICIDES.

Inventors

• 👤 L Schibler
• 👤 M Harris

Bibliographic Details