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    • 17. 发明专利
    • ANTIMICROBIAL AGENT
    • JPH09157113A
    • 1997-06-17
    • JP34730395
    • 1995-12-14
    • MIYOSHI YUSHI KK
    • TAKADA MITSUNOBUKURIHARA MASAMIKAMIO KATSUHISAKAWASHIMA MASAKIMORIYA MASAFUMI
    • A61L2/16A01N33/02A01N37/18A01N37/50
    • PROBLEM TO BE SOLVED: To provide an antimicrobial agent excellent in compatibility with resin, etc., by dispersing or solubilizing the salts of specific polyethyleneimine derivatives and acids, as active ingredients, in liquids such as water, etc., not using a specific assistant such as solvents. SOLUTION: This salt is obtained by neutralizing a polyethyleneimine derivative having at least one kind of hydrophobic group selected from among an alkyl, an acyl and a hydroxyalkyl group in a molecule and the average molecular weight of 200-100,000, with an acid. The 600-10,000 of average molecular weight is especially preferred for polyethyleneimine derivative. The preferred average amount of the hydrophobic group introduced to the polyethyleneimine is 0.1-0.7 groups per molecule of polyethyleneimine. The salt of polyethyleneimine derivative having hydrophobic groups in amount of the prescribed range is excellent in compatibility with resin or coating and manifests an excellent antimicrobial effect when used as an antimicrobial agent. The acid used in neutralizing is, for example, mineral acids such as hydrochloric acid, nitric acid, sulfuric acid, etc., an organic acids such as formic acid, lactic acid and malic acid, etc.