LAUSR

There is an increasing interest to enhance resistance to pathogens on the powder-coated surface. Traditional silver antimicrobial agents are hard to endure high curing temperature and lead to the yellowness of the surface appearance. Commercial sources usually cut down silver loading (less than 2.5w%) to avoid the color change and this will result in low inhibitory effect and poor durability. To improve the antimicrobial performance and maintain the appearance, Ag+, Cu2+, Zn2+ ternary inorganic antimicrobial agents on Linde A zeolite supports were prepared in this study. The silver content of this agent is increased to 8-10w% and the coated surface exhibits high antimicrobial efficiency. The coating appearance shows little adverse color change (∆E=1.47) when adding 2w% amount of agent. The reduction rate of this agent was over 99.99% after 6hrs for E. coli, S. aureus and C. albicans according to ASTM E2180-07 standard, and the paint film can maintain over 99% reduction rate even for 11 cleaning cycles. XP...