| 摘要 |
PROBLEM TO BE SOLVED: To provide a novel copolymer which is prepared by suitably selecting a monomer to be copolymerized with polyethylene glycol and can be used as a thickener, an emulsifier, a film-forming agent, a pigment dispersant, a percutaneous absorption accelerator or the like and provide a cosmetic containing the same. SOLUTION: A block copolymer containing polyethylene glycol moieties and copolymerized moieties having specific hydrophilic groups, hydrophobia groups, and amphiphatic groups as constitutional units is provided. A cosmetic containing the block copolymer is also provided.
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