Polyaspartic acid derivatives and process for preparing the same.

摘要

There are disclosed herein a polymer containing the following monomer unit (I) and/or (II): <CHEM> and a process for preparing the polymer which comprises, in ring opening reaction of the polysuccinimide, opening the ring of polysuccinimide by using an amino acid ester having an extremely high reactivity in place of an alpha -amino acid having an extremely low reactivlty. The polymer of the present invention is characterized by having no irritation to organisms (e.g., eyes and skin), and for example, the polymer is useful in the industrial fields of fields of medical supplies, health, beauty and sanitary aids, quasi-pharmaceuticals, and the like.