Drug – bio-affecting and body treating compositions – Solid synthetic organic polymer as designated organic active... – Polymer from ethylenic monomers only
Patent
1972-06-30
1976-09-21
Morris, Theodore
Drug, bio-affecting and body treating compositions
Solid synthetic organic polymer as designated organic active...
Polymer from ethylenic monomers only
424 34, 424 35, 424 36, 260 334R, 106154Z, 106187, 106189, 106190, 106193D, 106193J, 106198, 106308C, 106308P, 106308M, 106308R, A61K 932, A61K 934, A61K 936, A61K 938, C08K 114, C08K 126
Patent
active
039819841
ABSTRACT:
A pigment suspension for a film coating for tablets and the like comprising a solvent, pigment particles dispersed in the solvent, and a low molecular weight alcohol soluble polymer which acts as a protective colloid coating the pigment particles and providing for a higher concentration of pigment particles in the pigment suspension. The method of making the pigment suspension comprises the steps of pouring a solvent into a container, stirring the pigment particles into the solvent to disperse the pigment particles evenly, stirring a protective colloid into the liquid in the container and dispersing it therethrough to make the liquid less viscous and more adaptable for accepting additional pigment particles, and stirring additional pigment particles into the container liquid to obtain the desired pigment suspension.
A coating suspension for tablets and the like comprising the pigment suspension dispersed in a polymer solution. The method of making the coating suspension includes dispersing a powdered polymer in a first liquid solvent, stirring a second solvent into the liquid until all of the polymer is in solution, and stirring the pigment suspension into the polymer solution.
A coated tablet and the like having as the coating material in a thin film comprising a polymer having pigment particles dispersed therethrough, and a protective colloid coating the pigment particles.
REFERENCES:
patent: 2211912 (1940-08-01), Ryan
patent: 2304308 (1942-12-01), Hurd
patent: 2441927 (1948-05-01), Adams
patent: 3079303 (1963-02-01), Raff
patent: 3449489 (1969-06-01), Gaunt
patent: 3524756 (1970-08-01), Signorino et al.
patent: 3551133 (1970-12-01), Sprayberry
Colorcon Incorporated
Morris Theodore
LandOfFree
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