PROBLEM TO BE SOLVED: To provide an antimicrobial agent with slight or no tendency of discoloration with time, suitable to compounding in resin molded products, coating products, etc., through aiming to solve such problems as the discoloration of silver-based zeolite antimicrobial agents and resin discoloration attributable to silver ion.SOLUTION: The antimicrobial agent comprises a benzotriazole silver compound of the general formula(1)(wherein, R1 and R2 are same or different and each an alkyl, aryl, halogen atom, hydroxy, amino or carboxy and p1 and q1 are each an integer of 0-2). It is preferable that this agent be in the form of powdery granules 0.05-50&mum in size and the moisture content of this agent be adjusted to not more than 5 wt.%. Furthermore, it is preferable that this agent also contains a copper-containing compound and/or zinc-containing compound.COPYRIGHT: (C)2008,JPO&INPIT【課題】銀系ゼオライト抗菌剤の変色問題や、銀イオンによる樹脂の変色問題などの解決を目指し、経時による変色傾向がないか又は少なく、樹脂成形製品や塗料製品等への配合に適した抗菌剤を提供すること。【解決手段】本発明の抗菌剤は下記一般式(1)で表されるベンゾトリアゾール銀化合物を含有することを特徴とする。粒子径が0.05~50μmの粉粒体であり、水分が5重量%以下に調整されていることが好ましい。更に、銅含有化合物又は/及び亜鉛含有化合物を含有することも好ましい。【化1】【選択図】なし
