Antibacterial Agent

Abstract: This antibacterial agent comprises a blocked isocyanate. The blocked isocyanate comprises a capped polyisocyanate residue (A), an antibacterial-non-block cap group (B), and a non-antibacterial-block cap group (C). The capped polyisocyanate residue (A) is produced by capping a plurality of isocyanate groups in a polyisocyanate having the isocyanate groups. In the antibacterial-non-block cap group (B), at least some of the plurality of isocyanate groups are capped in a non-reproducible manner. In the non-antibacterial-block cap group (C), at least some of the plurality of isocyanate groups are capped in a reproducible manner. The antibacterial-non-block cap group (B) includes a quaternary ammonium group.

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