Ointment base

摘要

An ointment base which comprises: (a) a hydrogel formed by a water-soluble polymer and a material selected from the group consisting of water, a polyhydric alcohol and a mixture thereof; (b) a methacrylate copolymer selected from a group consisting of dimethylaminoethyl methacrylate/methyl methacrylate copolymer, ethyl methacrylate/chlorotrimethylammonium ethyl methacrylate copolymer or a mixture thereof; and (c) a solubilizer which dissolves the methacrylate copolymer but is incompatible with water and the polyhydric alcohol, a weight ratio of the methacrylate copolymer to the solubilizer being 1:2-1:25.