Patent ID: 6258343
Filing Date: 2001-07-10
Classification: A61K,A61Q,B01J

Abstract:
A method for encapsulating a water soluble reactive agent in an alkyl cellulosic polymer matrix to provide an encapsulated product from which leaching of the reactive agent into an aqueous dentifrice containing a compound reactive with the encapsulated agent is substantially prevented, the method comprising the steps of(a) uniformly dispersing the reactive agent in an alkyl cellulosic polymer and a solvent for the polymer to form a paste;(b) casting the paste onto a sheet forming substrate to form a sheet of reactive agent encased in the alkyl cellulose polymer;(c) grinding and subdividing the sheet having the reactive agent encased therein into particles of a predetermined size;(d) washing the particles with water to remove any encased agent exposed by the grinding; and(e) drying the particles of encapsulated reactive agent.