GRAFT POLYMER AND MOLDINGS THEREOF FOR MEDICAL SUPPLY

摘要

The present invention relates to graft polymer which is characterized in that it is formed by graft polymerization of structural units containing a quaternary ammonium group represented by general formula (A), (R2 and R3 each represent an alkyl group with from 1 to 3 carbons, and R4 represents an alkyl group with from 3 to 18 carbons. X represents at least one type of ion selected from halogen, sulphate, hydroxide and carboxylic acid ions.), preferably to graft polymer where the structural units containing a quaternary ammonium group represented by general formula (A) are structural units which are represented by general formula (I), (R1 represents at least one species selected from hydrogen, the methyl group and the ethyl group, and n represents an integer in the range 1 to 12. A represents at least one species selected from O, S and NR5. R5 represents hydrogen or an alkyl group with 1 to 12 carbons.) or graft polymer formed by the graft polymerization of structural units containing a quaternary ammonium group and structural units containing an alkoxypolyalkylene glycol moiety represented by the general formula (B), -(R5O)nR6 (n represents an integer in the range 1 to 100. R5 represents a straight-chain or branched alkylene group with from 1 to 4 carbons, and R6 represents at least one species selected from hydrogen and straight-chain or branched alkyl groups with from 1 to 4 carbons.). By applying or incorporating the graft polymer to/in medical devices which are left in the body for a long period, it is possible to prevent microbial infection arising via these medical devices.