Development of Hygienic Paint for Enabling the EPA Residual Efficacy Requirement

By Chun Liu, Kathryn Neely, Leon Estell, Nicole Wise, Lehong Jin, Kevin Janak, Arxada

Over the past couple years, hygienic paints and coatings have gained significant attention due to their continuous protection against the COVID-19 virus. Recently, the EPA published its interim guidance on the “Review for Products Adding Residual Efficacy Claims,” which requires ≥ 3 Log10 reduction of bacteria and virus after chemical treatment and dry abrasion in order to claim residual efficacy of paints and coatings. In this article, the development of hygienic paints using a proprietary insoluble copper (iCopper) and hydrophilic-modified DDAP/DDAB quaternary ammonium compound (Quat) technologies is presented.