WATER-REDISPERSIBLE GRANULES CONTAINING ACTIVE SUBSTANCE IN LIQUID STATE Russian patent published in 2003 - IPC

Abstract RU 2218363 C2

FIELD: stable emulsions. SUBSTANCE: invention provides granules, which are able to be redispersed in water and characterized by that preparation thereof comprises preparation of aqueous emulsion of at least one active substance, at least one nonionic surfactant, and at least one water-soluble or water-dispersible compound and drying of thus prepared emulsion; active substance is in the form of hydrophobic liquid; nonionic surfactant is selected from polyoxyalkylenated derivatives; and water-soluble or water-dispersible compound is selected from: (i) at least one polymer obtained by polymerization of at least one monomer I and at least one monomer II, where I is aliphatic, cyclic, or aromatic linear or branched ethylenically unsaturated monocarboxylic or polycarboxylic acid, or anhydride, and II is compound of general formula (R2)(R2)-C=CH2, in which radicals R2, the same or different, denote hydrogen atom, linear or branched, aliphatic or cyclic, saturated or ethylenically unsaturated C2-C10-radical, provided that the two radicals cannot be hydrogen atoms simultaneously; (ii) at least one polymer obtained by polymerization of at least one monomer I as designated above and additionally containing at least one grafted saturated or unsaturated, aromatic or non-aromatic hydrophobic C4-C30-hydrocarbon substituent; (iii) polypeptides of natural or synthetic origin containing at least one grafted saturated or unsaturated, aromatic or non-aromatic hydrophobic C4-C30- hydrocarbon substituent, which can have one or several heteroatoms in its chain; (iv) strongly depolymerized polysaccharides containing at least one grafted saturated or unsaturated, aromatic or non-aromatic hydrophobic C4- C30-hydrocarbon substituent, which can have one or several heteroatoms. EFFECT: enabled preparation of stable emulsion with high concentration of active substance. 23 cl, 2 ex

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RU 2 218 363 C2

Authors

Tesn Loran

Ehkan Zhan-P'Er

Dates

2003-12-10Published

1999-11-02Filed