▎ 摘　　要

NOVELTY - Bactericidal disinfectant comprises 0-5 wt.% propylene glycol, 0-5 wt.% first auxiliary agent, 0.5-5wt.% double-star wetting and dispersing agent, 1-10wt.% multi-anchor point type wetting dispersant,0.1-1wt.% graphene, 1-10 wt.% nano cuprous oxide, 1-10 wt.% nano titanium dioxide, 1-10 wt.% nano zinc oxide, 0.1-0.5 wt.% first antifoaming agent and 60-80 wt.% deionized water. USE - The bactericidal disinfectant is useful in bactericidal coating for disinfecting. ADVANTAGE - The bactericidal disinfectant: utilizes the nano geometrical size effect of the graphene, nano-cuprous oxide, nano titanium dioxide and nano-zinc oxide, so as to more quickly and fully with the bacterial virus contact through the graphene damage of the bacteria and virus surface; utilizes the nano-titanium dioxide that destroys sterilizing effect of composite, thus improving the effect of sterilizing and disinfecting from the whole. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: a method for preparing bactericidal disinfectant comprising adding the deionized water into the dispersing container, starting the dispersion machine, firstly rotating at the online speed of 3- 4 m/second, adding sequentially glycol, the first film-forming auxiliary agent, double-star wetting dispersant, multi-anchor point type wetting dispersant, dispersing for 5-15 minutes at the online speed of 15-30 m/second, graphene, the online speed is 15-30 m/second, dispersing for 15-30 minutes, adding nano cuprous oxide, continuously dispersing for 15-30 minutes at the online speed of 15-30 m/second, adding nano titanium dioxide the online speed is 15-30 m/second, dispersing for 15-30 minutes, adding nano zinc oxide, the online speed is 15 - 30 m/second and dispersing for 30-60 minutes, decelerating to linear speed is 3-4 m/second, adding the first antifoaming agent, dispersing for 15-30 minutes to obtain the sterilizing disinfectant ; a coating, comprising sterilizing disinfectant, 50-80 wt.% carrier, 3-10 wt.% second auxiliary agent, 5-15 wt.% deionized water, 1-10 wt.% sterilizing disinfectant, 0.1-15 wt.% other auxiliary agent; and a method for preparing coating, comprising adding carrier in the dispersing container, starting the dispersion machine, the rotating speed reaches 1500-2000 revolutions per minute, gradually adding premixture of the second coalescing agent and deionized water, dispersing for 10-30 minutes, adding dispersant, dispersing for 1-5 minutes, adding extinction powder, dispersing for 5-20 minutes, adding the second antifoaming agent, dispersing for 5- 10 minutes, decelerating to 800-1000 revolutions per minute, adding substrate wetting agent, dispersing for 5-10 minutes, adding flatting agent, dispersing for 5- 10 minutes, adding sterilizing disinfectant, dispersing for 10-30 minutes, reducing the speed to 500-800 revolutions per minute, adding thickening agent to adjust the coating, dispersing for 5-30 minutes, adding open auxiliary agent, and dispersing for 5-15 minutes to obtain the coating.