Abstract: A polymer treatment agent for rehabilitating damaged hair contains a block copolymer including a hydrophilic polymer chain segment and a hydrophobic polymer chain segment that is derived from a polyamino acid. The polymer treatment agent is not limited to methods for rehabilitating damaged head hair, but also can be applied to body hair including eyelashes and eyebrows; furthermore, it can increase the physical strength of hair even when applied in a very small amount and without using a silicone component.

Abstract: The invention provides a pharmaceutical formulation comprising drug-encapsulated polymer micelles formed from a block copolymer having a hydrophilic segment and hydrophobic segment, and has been subjected to high-pressure treatment. The invention also provides a treatment method for a block copolymer having a hydrophilic segment and a hydrophobic segment for formation of drug-encapsulated polymer micelles, the treatment method comprises a step of subjecting the block copolymer to high-pressure treatment.

Abstract: The invention provides a pharmaceutical formulation comprising drug-encapsulated polymer micelles formed from a block copolymer having a hydrophilic segment and hydrophobic segment, and has been subjected to high-pressure treatment. The invention also provides a treatment method for a block copolymer having a hydrophilic segment and a hydrophobic segment for formation of drug-encapsulated polymer micelles, the treatment method comprises a step of subjecting the block copolymer to high-pressure treatment.