Medicament releasing film-forming ointments and process of making

Claim 1

A TOPICAL NON-TACKY, SPREADABLE OINTMENT BASE CAPABLE OF HOLDING A UNIFORMLY DISPERSED SOLID MEDICINE, SAID BASE BEING OF PASTELIKE CONSISTENCY SUBSTANTIALLY FREE FROM THICKENING AGENTS, TACKIFIERS ANDVOLATILE ORGANIC SOLVENTS WHICH FORMS FAST DRYING FILMS AND PERMITS PASSAGE OF WATER VAPOR AND MEDICINES, SAID BASE CONTAINING SPRAYDRIED, SELF-EMULSIFIABLE POLYVINYL ACETATE POWDER, AND SAID BASE CONTAINING NOT MORE THAN SUBSTANTIALLY 65% POLYVINYL ACETATE BY WEIGHT AND NOT MORE THAN SUBSTANTIALLY 28.9% BY WEIGHT OF WATER, AND AT LEAST ONE NON-TOXIC, NON-IRRITANT, NON-SENSITIZING PLASTICIZER SELECTED FROM THE GROUP CONSISTING OF DIETHYLPHALATE, DI-ISO-OCTYLPHATHALATE, DIOCTYLPHTHALATE, ETHYL PHTHALYL ETHYLGLYCOLATE, BUTYL PHTHALYL BUTYGLYCOLATE, DIPHENYL-2-ETHYLHEXYLPHOSPHATE, ACETYLTRIBUTYLCITRATE, ACETYLYTRIETHYLCITRATE AND TRIETHYLCITRATE, THE COMBINED WATER AND PLASTICIZER CONTENT OF SAID BASE BEING SUBSTANTIALLY 35% TO 50% BY WEIGHT THEREOF AND THE RATIO OF SAID PLASTICIZER BEING SUBSTANTIALLY 35% TO 80% BY WEIGHT OF THE TOTAL POLYVINYLACETATE.