Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Tablets – lozenges – or pills
Patent
1995-10-12
1996-10-22
Nutter, Nathan M.
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Tablets, lozenges, or pills
424475, 424480, 424489, 530201, A61K 928
Patent
active
055674380
ABSTRACT:
A method of forming the aqueous-based shellac dispersion includes dissolving a shellac solution in a basic aqueous solvent to form a shellac solution and subsequently combining the shellac solution with an acidic aqueous solution, whereby the shellac precipitates to form the aqueous-based shellac dispersion. A film can be formed by applying the shellac dispersion to a suitable surface and exposing the dispersion to conditions which cause a substantial portion of the shellac particles in the dispersion to fuse, thereby forming a shellac film on the surface. The shellac film does not include any organic solvent for the shellac or any amine-containing shellac salt. A plasticizer can be employed to form a continuous shellac coating on a substrate at significantly reduced temperatures.
REFERENCES:
patent: 3390049 (1968-06-01), Rednick et al.
patent: 4177177 (1979-12-01), Vanderhoff et al.
patent: 4180559 (1979-12-01), Huber
patent: 4330338 (1982-05-01), Banker
patent: 4385078 (1983-05-01), Onda et al.
patent: 4513019 (1985-04-01), Brancq et al.
patent: 5059248 (1991-10-01), Signorino et al.
patent: 5202137 (1993-04-01), Duffy et al.
patent: 5324351 (1994-06-01), Oshlack et al.
Hagenmaier, R. D., and Shaw, P. E., "Permeability of Shellac Coatings to Gases and Water Vapor," J. Agricultural and Food Chemistry., 39(5):825-829 (1991).
Banker, G. S., and Peck, G. E., "The new, water-based colloidal dispersions," Pharmaceutical Technology, pp. 55-60 (1981, Apr.).
Chang, R. K., et al., "Preparation and evaluation of shellac pseudolatex as an aqueous enteric coating system for pellets," Int'l J. of Pharmaceutics, 60:171-173 (1990).
Cooney Jr. John M.
Nutter Nathan M.
Opta Food Ingredients, Inc.
LandOfFree
Shellac dispersions and coatings, and method of forming aqueous- does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Shellac dispersions and coatings, and method of forming aqueous-, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Shellac dispersions and coatings, and method of forming aqueous- will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2356708