Patent ID: 6114156
Filing Date: 2000-09-05
Classification: A61K,A61Q,C08K,C08L,C09D,D01F,D21H,Y10T

Abstract:
A process of providing a polymer coating on individual molecules of a metal oxide comprising the steps of:providing a resin kettle equipped with a mechanical stirrer, nitrogen inlet, moisture trap and reflux condenser;adding a quantity of o-xylene solvent to the resin kettle and heating the solvent to reflux temperature;combining a ten part, by weight, aliquot of a 10 weight percent solution of polymer in a polar aprotic solvent, with a ten part aliquot, by weight, of a metal alkoxide and a ten part aliquot, by weight, of water;stirring the resulting reaction resin mixture until homogeneous;adding the homogenous resin mixture dropwise via an addition funnel into the refluxing o-xylene;heating the combined resin and o-xylene solvent at a temperature of approximately 140.degree. C., with stirring overnight;allowing the kettle to cool to room temperature (25.degree. C.) and recovering the solid precipitate by filtration;drying the solid precipitate under vacuum for 12 hours at 200.degree. C. to recover a yield of polymer-metal oxide encapsulated molecular level particles in the form of a fine powder.