MICROCAPSULES AND METHOD OF PREPARATION THEREOF Russian patent published in 2000 - IPC

Abstract RU 2159037 C2

FIELD: microcapsulation technology. SUBSTANCE: microcapsules prepared by interface polymerization contain 0.1 to 55% of solid agrochemical agent suspended in water-immiscible organic liquid and 0.01 to 10% of nonionic dispersant exhibiting interface activity and no emulsification effect. Agrochemical agent and organic liquid may be represented by herbicide. Polymer wall of microcapsule is composed of a polymer based on mixture of isocyanates and esterified urea-formaldehyde prepolymer. Preparation of microcapsules consists in preparing suspension of agrochemical agent in organic liquid containing aforesaid dispersant and prepolymers followed by introducing suspension into aqueous phase containing protecting colloid and surfactant and stirring resulting mixture at high shear value, while controlling, if necessary, temperature and/or pH of emulsion, until microcapsules are formed. EFFECT: simplified procedure. 18 cl, 2 tbl

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RU 2 159 037 C2

Authors

Gerbert Benson Sher

Dzhin Ling Chen

Dates

2000-11-20Published

1994-11-07Filed