| 摘要 |
FIELD: medicine. ^ SUBSTANCE: invention refers to a method for preparing an oral care composition containing a film or film fragments with the film containing an active ingredient. The method involves: (a) immersion of the film into a medium containing the active ingredient wherein the active ingredient contains a whitening agent and wherein the film contains a polymer specified in a group consisting of water-soluble, water-dispersed and water-insoluble polymers, and substantially does not contain the active ingredient; (b) transfer at least of a portion of the active ingredient from the medium into the film wherein the procedure is continued until the film contains such effective amount of the transferred active ingredient that makes the film acceptable for the use in the oral care composition wherein the amount of the transferred active ingredient found in the film after the procedure makes 0.5 wt % of film weight and higher with a transfer cycle making 30 and less minutes; and (c) application of the medium containing said film comprising the transferred active ingredient in an orally acceptable carrier. ^ EFFECT: preparing the oral care composition containing the film with the effective amount of the whitening agent in a relatively short time. ^ 7 cl, 6 tbl, 6 ex |
