Patch containing shikonin and method for producing the same

摘要

PROBLEM TO BE SOLVED: To provide a patch which appropriately releases shikonins from an adhesive layer to the skin, is hard to be peeled off from the skin, and is hard to cause adhesive residue when peeled off, and a method for producing the same. Means for Solving the Problems A support and a pressure-sensitive adhesive layer are provided, and the pressure-sensitive adhesive layer comprises a resin composition and a liquid composition, and the content of the resin composition is 25% by mass or more and less than 100% by mass. , The liquid composition contains ciconins and nonionic surfactants, and the acrylic copolymers are (meth) acrylic acid alkyl esters, (meth) acrylic acid alkoxyalkyl esters having no hydroxy group in the molecule, and saturated. It is composed of a first structural unit derived from a monomer selected from a fatty acid vinyl ester, a (meth) acrylic acid hydroxyalkyl ester, and a second structural unit derived from a monomer selected from hydroxyalkyl (meth) acrylamide. The acrylic copolymer is a patch having a network structure crosslinked with an isocyanate-based cross-linking agent. [Selection diagram] Fig. 1