Guanidin-group containing polymer, cosmetic employing same and method of preparing same

摘要

1. A polymer for cosmetic use having a weight average molecular weight of 5.0.10<3>-1.0.10<7> and comprising a repeating unit having at least the guanidino group denoted by general formula (I) below <CHEM> (where, in the formula, R<1> denotes a hydrogen atom or hydrocarbon group, R<2> denotes a hydrogen atom or methyl group, X denotes a connecting group, comprising a member selected from the group of bivalent group listed below <CHEM> (where, in the formula, R<3>, denotes a hydrogen atom, alkyl group with 1-24 carbon atoms, aryl group, arylalkyl group, or hydroxy group). and the guanidino group in the formula is optionally a salt, to which an acid has been added