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US 10,299,996 B2Granted
Active ingredient capsules
AssigneeSymrise AG
InventorsJenny Weissbrodt, Frank Aickele, Ralf Bertram
Life of this patent
Estimating the term…
Abstract
Active ingredient capsules are proposed which are obtainable by, with the input of mechanical and thermal energy, (a) dissolving and/or dispersing proteins, polysaccharides and cellulose derivatives in water, (b) adding the active ingredients to be encapsulated, (c) hardening the resulting coacervates with the addition of tannins and optionally (d) then subjecting them to a spray drying.
Claims12
A process for producing controlled release active ingredient capsules, consisting essentially of:
- (a) dissolving and/or dispersing (a1) proteins, (a2) polysaccharides and (a3) cellulose derivatives in water with the input of mechanical and thermal energy to form a coacervate,
- (b) adding active ingredients to be encapsulated to the coacervate to form active ingredient capsules,
- (c) hardening the resulting active ingredient capsules with the addition of natural tannins, in the absence of glutaric aldehyde and formaldehyde for a period of 5 to 10 hours, and
- (d) optionally, spray-drying the hardened active ingredient capsules and wherein the process occurs in a maximum of 12 hours;
- wherein the process is conducted with half of the water that would be required if cellulose derivatives (a3) were not used in the process.
2 more elements
Dependencies are inferred from the claim text.