Pulverulent products composed of a water-insoluble core substance and of a protective covering
AssigneeBASF SE
InventorsJoachim U. Schneider, Gerhard Schwarz, Paul Grafen, Wolfgang Bewert, Horst Schumacher
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Abstract
Pulverulent products composed of a water-insoluble core substance and of a protective covering, are obtainable by dispersing the core substance in an aqueous solution of amylose or a starch with an amylose content of more than 40% by weight as film-forming polymer for the protective covering, spraying this dispersion using hydrophobic silica as auxiliary and subsequently drying the sprayed particles.
Claims6
A pulverulent product having an average particle size of from 100 to 600 .mu.m and which particles are insoluble in hot water, said particles being composed of a water-insoluble core substance and a protective covering, obtained by
- dispersing the core substance in an aqueous solution of amylose or a starch with an amylose content of more than 40% by weight as film-forming polymer for the protective covering,
- spraying this dispersion using hydrophobic silica as auxiliary and
- subsequently drying the sprayed particles.
A process for preparing a pulverulent product composed of a water-insoluble core substance and a protective covering which comprises:
- dispersing the water-insoluble core substance having an average particle size of from 100 to 600 mm and which particles are insoluble in hot water in an aqueous solution of a film-forming amylose or starch polymer having an amylose content of more than 40% by weight,
- spraying the dispersion with the aid of hydrophobic silica as a spraying auxiliary, and subsequently drying the sprayed product.
Dependencies are inferred from the claim text.