Nonaggregating hydrocolloid microparticulates, intermediates therefor, and processes for their preparation
AssigneeFMC Corporation
InventorsChristopher J. Sewall, Donald W. Renn, Peter J. Riley, William R. Thomas, Lisa E. Dumont, Guy A. Crosby
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Abstract
Substantially dry, rehydratable, water-dispersible, gel-forming, porous hydrocolloid microparticulates containing internally or internally and externally at least one water-soluble, non-gelling, hydration enhancing hydrocolloid, processes and intermediates for their preparation, and their uses.
Claims12
A process for the preparation of substantially dry, rehydratable, water-dispersible, gel-forming, porous hydrocolloid microparticulates which comprise:
- (a) a gel-forming hydrocolloid which comprises a matrix of the porous microparticulates;
- and
- (b) at least one water-soluble, non-gelling, hydration-enhancing hydrocolloid;
- wherein the component (a) matrix contains component (b) internally within its porous structure, and wherein component (b) may be on at least a portion of the outer surfaces of the microparticulates comprising the steps of
- (a) forming hydrocolloid gel microparticulates from the gel-forming hydrocolloid,
- (b) contacting the hydrocolloid microparticulates with at least one water-soluble, non-gelling, hydration enhancing hydrocolloid in an aqueous medium, and
- (c) drying the resulting hydrocolloid microparticulates.
A process for the preparation of substantially dry, rehydratable, water-dispersible, gel-forming, porous hydrocolloid microparticulates which comprise:
- (a) a gel-forming hydrocolloid which comprises a matrix of the porous microparticulates;
- and
- (b) at least one water-soluble, non-gelling, hydration-enhancing hydrocolloid;
- wherein the component (a) matrix contains component (b) internally within its porous structure, and wherein component (b) may be present on at least a portion of the outer surfaces of the microparticulates
- comprising the steps of
- A) forming an aqueous composition comprising at least one gellable hydrocolloid and at least one water-soluble, non-gelling, hydration enhancing hydrocolloid,
- B) forming hydrocolloid gel microparticulates from the composition of step A), and
- C) drying the resulting hydrocolloid microparticulates.
Dependencies are inferred from the claim text.