Patent ID: 7070828
Filing Date: 2006-07-04
Classification: A61K

Abstract:
1. A process for coating solid particles comprising the steps of a) contacting a gas with a fluid composition comprising i) from 0.01 to 30 weight percent of a polymer, ii) from 99.99 to 70 percent of a liquid diluent, based on the total weight of the polymer i) and the liquid diluent ii), to produce a foam, and b) contacting the produced foam with solid particles and agitating the particles to provide a coating on the solid particles, wherein the solid particles comprise a drug or the fluid composition comprises a drug or the solid particles and the fluid composition comprise a drug, wherein the polymer i) has a weight average molecular weight of at least 10,000 and is one or more polymers selected from the group consisting of cellulose ethers, cellulose esters, polyalkylene oxides, homo- and copolymers of vinyl alcohol, and homo- and copolymers of vinylpyrrolidone, wherein the liquid diluent is a monofunctional alcohol, alkene, alkane, halogenated alkene, halogenated alkane, ether, ester, a paraffin oil, an animal oil, a vegetable oil, or water, and wherein the amount of other additives, if present, is up to 25 weight percent, based upon the total weight of the fluid composition.