Cross-linked hydroxypropylcellulose microcapsules and...

Details Cross-linked hydroxypropylcellulose microcapsules and... Cross-linked hydroxypropylcellulose microcapsules and...

B - Operations, Transporting

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B01J 13/02 (2006.01) B01J 13/08 (2006.01) B01J 13/16 (2006.01) B41M 5/165 (2006.01)

Patent

CA 1040018

CROSS-LINKED HYDROXYPROPYLCELLULOSE MICROCAPSULES AND PROCESS FOR MAKING ABSTRACT Microcapsules containing an oil are produced using hydroxypropylcellulose as a wall-forming material by emulsifying an oil containing an oil soluble cross-linking agent for the hydroxypropylcellulose in an aqueous solution of hydroxypropylcellulose at a temperature below the precipitation temperature of hydroxypropylcellulose, heating the emulsion to a temperature above the precipitation temperature of hydroxypropylcellulose and maintaining that temperature until the microcapsule walls are oil and water insoluble. Water soluble cross-linking agents for the hydroxypropylcellulose may be added to the aqueous solution prior to heating the emulsion.

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