POLYMER AND ITS USE FOR THE TREATMENT AND/OR PREVENTION OF HYPERPHOSPHOREMIA

摘要

A polymer or its salt which is obtainable by polymerization of a monomer of the formula (I) or its salt in the presence of a radical initiator, or by polymerization of a monomer of the formula (I) or its salt with a monomer of the formula (II) or its salt in a molar ratio of (I): (II) being 1:0.1 to 1:25 in the presence of a radical initiatorwherein R1 and R3 are each hydrogen atom or lower alkyl group, R2 and R4 are each acyl group,aliphatic silyl group,amino lower alkyl group which may have one or more suitable substituent(s),heterocyclic group which may have one or more suitable substituent(s) orcarboxy group esterified by the residue of cellulose optionally substituted with one or more lower alkyl and/or lower alkenoyl.