Antiviral Agent

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

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