To obtain an antimicrobial which exerts excellent antimicrobial activity at the small amount in a short time without discoloring resins even when it is kneaded with the resins.
This antimicrobial is comprised of a mixture between zinc oxide impalpable powder which is coated with Ag or an Ag alloy and has an average particle diameter of 1 μm or less and uncoated zinc oxide impalpable powder. The Ag coating is carried out by dry process in a coating proportion of 1-10 wt.% based on the zinc oxide impalpable powder. By dispersing Ag- coated zinc oxide impalpable powder and uncoated zinc oxide impalpable powder into a resin in a compound proportion of 0.1-5 wt.%, the resin is not colored or discolored even in the environment exposed to light irradiation and excellent antimicrobial activity is given to resins, paints, fibers, cosmetics or the like.
TAKESHIMA EIKI
SAIDA JUNJI
NAKAMURA HIROSHIGE
NAKANE MICHIO
TOYO INK MFG CO
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