SU405579A1 - METHOD OF OBTAINING MICROCAPSULES - Google Patents

Description

Often, the retreat is related to the techaike obtained by a full-time microcamera, a1 psul, and mpozid, based on them, used in various industries. The known method of preparing microcapsules by mixing capsules and rumugo material with patTBOpOM polymers, forming a shell, with the subsequent curing by the reaction of the adjacent phase polycondensadia, washing and drying. Microfluoric capsule. A disadvantage of the known method is the slipping of drops of liquid and the formation of matched capsules, which leads to large losses of the polymer entering the composition of the encapsulated liquid. The purpose of the invention is to prevent the occurrence of agglomeration, radionia-by the fact that capsules with uncured shells are passed through a layer of inert liquid: KostIi, which is not miscible with the Polymer solution. A plasticizer is commonly used as an inert liquid. For example, di-butyl (phthalate. For acceleration and the encapsulated process, liquid and liquid can be heated. The reagents used to produce microcapsules are 0-determined.: Density Thorough polymer should be less dense than encapsulated material; intermediate liquid should not mix with polymer solvent, dissolve polymer, react with solvent and polymer, its density should be greater than solution density imera and less density of the encapsulated material. hyala; the hardener must be well mixed with the solvent of the polymer, must not dissolve the polymer, must be mixed with the intermediate liquid and must not react with it, its density must be greater than the density of the polymer This is also liquid with T.P.I.... me 1. Encapsulation of Grammy Ammonium I nitrate (IH4KUz) in a nitrocellulose casing. In a glass cylinder (15 mm dia., height 100 mm) pour layer upon layer chloroform 70 mm high, dibutyl phthalate 10 mm high, solution of cellulose nitrate .and 15 -646 mm. Ammonium nitrate granules are dipped into the upper layer, the passage through which they carry on their surface a solution of nitrocellulose, forming a continuous shell in the granule. The passage is a layer of dibutyl phthalate, the shell on the gr. Anul of the form. M1. It is formed into a film of uniform thickness. Falling into chloroform, the shell is cured by partially removing the solvent of nitrocellulose in chloro3.

forms. The granules are removed from the cylinder, separated; from the liquid (And, washed and dried in air.

In, mr ah 2-5,. In the table, microcapsules are produced in the same way as in me. 1

Subject invention

1. A method for producing psules by mixing a mother core with a polime solution, forming a casing, followed by its confirmation by its interphase polycondensation reaction, washing and drying the microcapsules, characterized in that, in order to prevent agromeration, the capsule uncured shell: M | And pr | 0 is passed through a layer of inert liquid that is not miscible with the polymer solution.

i2. A method according to claim 1, characterized in that a plasticizer is used as an inert liquid, for example dibutyl phthalate.