▎ 摘　　要

NOVELTY - Projection wall coating comprises 30-50 pts. wt. polyurethane resin, 3-8 pts. wt. graphene, 5-10 pts. wt. nano titanium dioxide, 20-30 pts. wt. silica sol, 10-20 pts. wt. diatomite, 8-15 pts. wt. white carbon black, 10-18 pts. wt. nano calcium carbonate, 10-20 pts. wt. talc powder, 5-16 pts. wt. attapulgite clay, 3-7 pts. wt. de-foaming agent, 4-9 pts. wt. cosolvent, and further comprises water (required amount). USE - Used as projection wall coating. ADVANTAGE - The coating provides comfort picture view, provides writing, marking, and can easily erase handwriting, and it has good application value. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing projection wall coating comprises (i) providing polyurethane resin and the graphene into a reaction kettle, mixing and stirring uniformly, reacting at 80-95 degrees C for 2-3 hours to obtain the graphene modified polyurethane resin, (ii) respectively weighing nano titanium dioxide, silica, attapulgite clay, antifoaming agent, cosolvent and proper water into the modified polyurethane resin, mixing and stirring uniformly, then placing it into ultrasonic wave for ultrasonic processing for 10-30 minutes, then transferring to a ball mill to grind to have a grain size of less than 20 microns, (iii) adding the mixture of diatomite, white carbon black, nano calcium carbonate, talc powder, mixing and stirring uniformly, then the rotating speed is 4000-5000 revolutions/minutes, shearing for 10-20 minutes to obtain the projection wall painting.