PROCESS FOR MAKING MICROCAPSULES INVOLVING PHASE INVERSION

A process for making microcapsules of an oil which are in dispersion in wate r comprises the steps of; (i) forming an initial dispersion of the oil in wate r in the presence of a surfactant, (ii) heating the initial dispersion above i ts phase inversion temperature, to form a bicontinuous phase comp...

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Bibliographic Details
Main Authors GEORGE, NEIL, DAWSON, STEPHEN, CASSON, BRIAN DEREK, SHIRLEY, IAN MALCOLM
Format Patent
LanguageEnglish
French
Published 28.04.2009
Subjects
AGRICULTURE
ANIMAL HUSBANDRY
BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES, AS HERBICIDES
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
FISHING
FORESTRY
HUMAN NECESSITIES
HUNTING
HYGIENE
MEDICAL OR VETERINARY SCIENCE
PERFORMING OPERATIONS
PEST REPELLANTS OR ATTRACTANTS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
PLANT GROWTH REGULATORS
PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTSTHEREOF
THEIR RELEVANT APPARATUS
TRANSPORTING
TRAPPING
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Summary:A process for making microcapsules of an oil which are in dispersion in wate r comprises the steps of; (i) forming an initial dispersion of the oil in wate r in the presence of a surfactant, (ii) heating the initial dispersion above i ts phase inversion temperature, to form a bicontinuous phase composition, (iii) allowing or causing the composition to cool to below the phase inversion temperature so as to form an emulsion of oil droplets in the water, and (iv) encapsulating the oil droplets. The oil preferably has dissolved in it an oi l- soluble or oil-dispersible active ingredient selected from agrochemicals, cosmetics, fragrances, sun-screens, ink-jet dyes, pigments, toners, biocides and pharmaceutical and veterinary products including drug delivery systems.< /SDOAB>
Bibliography:Application Number: CA20022438199