KR850005290A - Manufacturing method of multi-type microcapsule - Google Patents

Abstract

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Description

Manufacturing method of multi-type microcapsule

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Claims (12)

Hydrolysis of the isocyanate monomer takes place to form an amine, and in turn reacts with another isocyanate monomer to form a polyurea, thereby forming a water-immiscible material in a separate capshule of polyurea without the addition of a second reactant. A process for capsulating, (a) at room temperature, (ii) providing a dispersion of organic polyisocyanate and (i) capsulifying water-immiscible material and organic polyisocyanate in an aqueous phase consisting of a solution of water, a surfactant and a protective colloid, ; (b) heating and maintaining the dispersion at a temperature of about 40 ° C. to about 90 ° C., wherein the water-immiscible material is capululated in a separate polyurea capwool epidermis that can be used directly without further separation or purifying. Consisting of; A plurality of water-immiscible phases are provided which consist of a water-immiscible material to be capshuled in a polyurea wall, each formed from an organic polyisocyanate, and dispersing said individual water-immiscible phases sequentially or simultaneously in said water phase. Method for producing a multi-type microcapsule, characterized in that. A method for producing a multi-type microcapsule of claim 1, wherein the dispersed water-immiscible phase consists of droplets having a particle size of about 0.5 to about 4,000 microns. Dispersion is a method for producing a multi-type micro cashew wool of claim 2, which is maintained by stirring gently. The water-immiscible phase comprises about (a) about 0.1 to about 10.0 weight percent of the basic organic tertiary amine catalyst based on the weight of the organic phase and (b) about 0.001 to about 1.0 weight percent alkyl based on the weight of the organic phase. A method for producing a multi-type microcap sole of claim 3 based on a group of grooves consisting of an acetate catalyst. Dispersion is a method for producing a multi-type microcapsule of claim 3, comprising a catalyst capable of increasing the reaction rate of the organic polyisocyanate to form a polyurea. The catalyst is a method for producing a multi-type microcapsule of claim 5, wherein the catalyst is selected from a grouping consisting of a basic organic tertiary amine catalyst and an alkyl tin acetate catalyst. Dispersion is a method for producing a multi-type microcamsule of claim 1, comprising a catalyst that can increase the reaction rate of the organic polyisocyanate to form a polyurea. The catalyst is a method for producing a multi-type microcapsule of claim 7, wherein the catalyst is selected from a grouping consisting of a basic organic tertiary amine catalyst and an alkyl tin acetate catalyst. The water-immiscible phase is (a) about 0.1 to about 10.0 weight percent basic organic tertiary amine catalyst based on the weight of the organic phase and (b) about 0.001 to about 1.0 weight percent alkyl based on the weight of the organic phase A method for producing a multi-type microcapsule of claim 1 based on a groove selected from an acetate catalyst. A capshule capable of controlled release of a capshulated organic material consisting of a thiocarbamate herbicide enclosed in a polyurea capshoulne produced by the method of claim 9. A capshoel capable of controlled release of a capsulached organic material consisting of an organophosphorus pesticide enclosed in a polyurea capshoe to be produced by the method of claim 9. A capshoe wool capable of controlled release of capschulized organic material consisting of an insecticidal hormone enclosed in a polyurea produced by the method of claim 9. ※ Note: The disclosure is based on the initial application.