| 摘要 |
PROBLEM TO BE SOLVED: To obtain a keratotic plug remover which keeps high film strength even under high humidity and can certainly remove keratotic plug clogging pores in the skin by including a copolymer containing a vinyl monomer bearing salt-forming groups and a hydrophobic vinyl monomer as essential monomers. SOLUTION: This keratotic plug remover is obtained by including a copolymer, which contains at least (A) vinyl monomer [e.g. maleic acid, dimethylaminoethyl (meth)acrylate or the like] bearing salt-forming groups (e.g. carboxyl, acid anhydride, phosphonic acid and the like) and (B) hydrophobic vinyl monomer, e.g. an alkyl (meth)acrylate, an alkyl (meth)acrylamide or the like as essential monomers, as an active ingredient. The components A and B are preferably blended in proportions of 20-95 mol% and 5-80 mol%, respectively, based on the whole monomer used in the above copolymerization. Further, the above copolymerization can be carried out by all means of bulk polymerization, solution polymerization, suspension polymerization, emulsion polymerization and the like in the presence of a radical polymerization initiator.
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