Patent ID: 11890383
Assignee: CAPSUGEL BELGIUM NV
Field: Pharmaceuticals (Chemistry)
Classification: CPC A | IPC A

Claim 11:
12. A method of preparing a hard capsule shell of claim 1, comprising the steps of:
a) preparing an aqueous dispersion of precipitated calcium carbonate opacifier through mixing;
b) preparing a film-forming formulation comprising one or more film-forming agents, wherein the film-forming agent is gelatin, or pullulan, or a cellulose based polymer, or any combination thereof;
c) adding the aqueous dispersion of step a) to the film-forming formulation of step b);
d) mixing the resulting dispersion of step c), thereby obtaining a film-forming composition comprising 3 wt % to 10 wt % of the precipitated calcium carbonate opacifier based on final dry weight of the film-forming composition; and
e) producing a hard capsule shell from the film-forming composition by means of dip molding.