▎ 摘　　要

NOVELTY - An engineering machinery paint comprises 55-56 pts. wt. two-component polyurethane, 23-24 pts. wt. epoxy resin, 22-23 pts. wt. styrene-acrylic emulsion, 0.6-0.7 pts. wt. antioxidant, 1.9-2 pts. wt. defoaming agent, 2.3-2.4 pts. wt. additive, 1.3-1.4 pts. wt. dispersing agent, 1.6-1.7 pts. wt. antifreezing agent, 28-29 pts. wt. modified graphene, 13-14 pts. wt. nano-titanium dioxide, 6-7 pts. wt. mica powder, 1.3-1.5 pts. wt. KH-570 (RTM: silane coupling agent), 5-6 pts. wt. sodium orthophosphate, 7-9 pts. wt. sodium tripolyphosphate, and 56-57 pts. wt. solvent. USE - Engineering machinery paint. ADVANTAGE - The paint has high adhesion and good wear resistance. DETAILED DESCRIPTION - An engineering machinery paint comprises 55-56 pts. wt. two-component polyurethane, 23-24 pts. wt. epoxy resin, 22-23 pts. wt. styrene-acrylic emulsion, 0.6-0.7 pts. wt. antioxidant, 1.9-2 pts. wt. defoaming agent, 2.3-2.4 pts. wt. additive, 1.3-1.4 pts. wt. dispersing agent, 1.6-1.7 pts. wt. antifreezing agent, 28-29 pts. wt. modified graphene, 13-14 pts. wt. nano-titanium dioxide, 6-7 pts. wt. mica powder, 1.3-1.5 pts. wt. KH-570 (RTM: silane coupling agent), 5-6 pts. wt. sodium orthophosphate, 7-9 pts. wt. sodium tripolyphosphate, and 56-57 pts. wt. solvent. The modified graphene is prepared by: (A) placing 8-12 pts. wt. graphene and 26-30 pts. wt. sulfuric acid/nitric acid mixed solution into a water bath at 65-68 degrees C in the first reaction vessel, uniformly mixing to obtain a first ultrasonic dispersion material A, where the first ultrasonic dispersion time is 1.5-2 hours, the first ultrasonic dispersion frequency is 25-28 kHz, the first ultrasonic dispersion of power is 1000-1200 W, and the material A includes 3-6x 14 pts. wt. deionized water; (B) adjusting pH to 6.8-7.1, aging for 2-3 hours, suction filtration, and drying to obtain material B comprising 26-29 pts. wt. thionyl chloride and 13-16 pts. wt. N, N-dimethyl formamide; (C) placing the material B at 80-85 degrees C under nitrogen, incubating for 26-28 hours for 2-3 hours, distilling under reduced pressure, aging for 2-2.5 hours, suction filtration, and drying to obtain the material C comprising 12-15 pts. wt. triethylenetetramine; and (D) adding the material C in a third reaction vessel, carrying out ultrasonic dispersion at 60-65 kHz and 1100-1300 W for 2-3 hours, increasing the temperature of the third reaction vessel to 106-110 degrees C, holding for 2-3 hours, and carrying out vacuum distillation for 1-1.6 hours, filtering and drying to obtain the modified graphene; where the sulfuric acid/nitric acid solution has a concentration of 96-98 wt.% sulfuric acid solution, and the nitric acid solution has a concentration of 52-55 wt.% nitric acid solution; the two-component polyurethane comprises two components at a mass ratio of 1-1.5:2-3 blend; and the weight ratio of acrylic emulsion styrene to acrylic acid is 1.8-2.2:1-1.3.