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Process for the preparation of granules for the controlled release of volatile compounds

, : Process for the preparation of granules for the controlled release of volatile compounds. Official Gazette of the United States Patent & Trademark Office Patents 1273(3), Aug 19

A process for shaping into a granular form a delivery system for the controlled release of flavor or fragrance compounds. This process includes the steps of preparing a mixture of a continuous phase carrier containing a volatile flavor or fragrance compound or composition finely divided therein and having a low water content. This guarantees that the glass transition temperature of the mixture is the glass transition temperature of the final product. The mixture is then heated within a screw extruder to a temperature of between 90 and 130degree C. to form a molten mass, the molten mass is extruded through a die and then chopped as it exits the die. The latter step is performed at a temperature above the glass transition temperature of the carrier.


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