▎ 摘　　要

NOVELTY - Outdoor construction, high environmental protection aqueous -based metal protective paint comprises 30-40 pts. wt. aqueous-based acrylic modified alkyd resin, 1-2 pts. wt. dispersant, and 10-16 pts. wt. nano titanium dioxide , 2-3 pts. wt. film-forming agent, 0.3-0.8 pts. wt. defoamer, 5-10 pts. wt. talc, 0.1-0.5 pts. wt. wetting agent, 0.3-0.5 pts. wt. thickener, 1-2 pts. wt. isooctyl phosphate, 0.1-0.3 pts. wt. leveling agent, 0.2-0.6 pts. wt. silane coupling agent, 0.4-0.6 pts. wt. drier and 25-35 pts. wt. deionized water; the aqueous -based acrylic acid modified alkyd resin is (i) mixing caprylic acid, capric acid, trimethylolpropane and phthalic acid in xylene, introducing maleic anhydride, stirring, mixing acrylic acid, acrylic acid hydroxyl ethyl ester and azobisisobutyronitrile, obtaining first mixed solution, mixing methyl methacrylate and butyl methacrylate, introducing mixed solution into aqueous-based acrylic resin and and stirring. USE - Used as outdoor construction, high environmental protection aqueous-based metal protective paint. ADVANTAGE - The structure can increase the glass transition temperature of the paint and ensure that the metallic paint has a low film-forming temperature. In this way, the viscosity of alkyd resin is moderate at lower ambient temperature, which is convenient for construction. DETAILED DESCRIPTION - Outdoor construction, high environmental protection aqueous -based metal protective paint comprises 30-40 pts. wt. aqueous-based acrylic modified alkyd resin, 1-2 pts. wt. dispersant, and 10-16 pts. wt. nano titanium dioxide , 2-3 pts. wt. film-forming agent, 0.3-0.8 pts. wt. defoamer, 5-10 pts. wt. talc, 0.1-0.5 pts. wt. wetting agent, 0.3-0.5 pts. wt. thickener, 1-2 pts. wt. isooctyl phosphate, 0.1-0.3 pts. wt. leveling agent, 0.2-0.6 pts. wt. silane coupling agent, 0.4-0.6 pts. wt. drier and 25-35 pts. wt. deionized water; the aqueous -based acrylic acid modified alkyd resin is (i)mixing caprylic acid, capric acid, Trimethylolpropane and phthalic acid in xylene, warming up to 180-230 degrees Celsius, stirring for 3-6 hours, the xylene was distilled off under reduced pressure, cooling reaction system to 170-190degreesC, introducing maleic anhydride, stirring reaction 1-3 hour, cooling to 100-130 degrees Celsius, introducing graphene oxide and ethylene glycol butyl ether, stirring for 0.5-1.5 hours, cooling to 70-90 degreesC to obtain aqueous -based acrylic resin; mass ratio of graphene oxide and ethylene glycol butyl ether is 20:10-15:20-23:18-22:13-15:5-9:2-5:4.5-60, mixing acrylic acid, acrylic acid hydroxyl ethyl ester and azobisisobutyronitrile, obtaining first mixed solution, for subsequent use, mixing methyl methacrylate and butyl methacrylate uniformly, obtaining second mixed solution, where mass ratio of hydroxyethyl acrylate, butyl methacrylate and azobisisobutyronitrile is 5:22-25:1-5:4-6:0.5-2, (iii) introducing first mixed solution into aqueous -based acrylic resin and controlling temperature to not exceed 90 degreesC when adding, and the addition is completed, stirring at 70-90degrees Celsius for 0.5-1 hour, introducing second mixed solution, stirring at 70-90 degreesC for 2-3 hours, adjusting pH of reaction system to 8-9 with aqueous ammonia, High-speed dispersion for 0.5-1.5 hours to obtain aqueous-based acrylic modified alkyd resin, where step the obtained water-based acrylic resin, the first mixed solution and the mass ratio of the second mixed solution are 10:1-2:1-2 and mass concentration of the aqueous ammonia is 15-25% An INDEPENDENT CLAIM is also included for preparing outdoor construction, high environmental protection water-based metal protective paint comprises (i) mixing 10-16 pts. wt. nano titanium dioxide, 0.2-0.6 pts. wt. silane coupling agent and 25-35 pts. wt. deionized water to obtain a third mixed solution; (ii) mixing 30-40 pts. wt. water-based acrylic modified alkyd resin, 1-2 pts. wt. dispersant, 2-3 pts. wt. film-forming agent, 0.3-0.8 pts. wt. defoamer, 5-10 pts. wt. talc, and 0.1-0.5 pts. wt. wetting agent parts, 0.3-0.5 pts. wt. thickener, 1-2 pts. wt. isooctanol phosphate, 0.1-0.3 pts. wt. leveling agent and 0.4-0.6 pts. wt. drier are stirred and mixed, and the third mixed solution obtained in step (1) is added thereto, stirring and mixing, grinding to a fineness of less than 50 mum to obtain a water-based protective paint for outdoor construction and high environmental protection; the dispersant is -9610W or BYK190; the film-forming agent is a mixture of FX 511 and ethylene glycol, the mass ratio of FX 511 and ethylene glycol is 2-5:5; the defoamer is TEGO-901 W (highly effective deaerator concentrate) or TEGO-810 (Effective defoamer), the wetting agent is TEGO-245 or TEGO270 (silicon additive) or TEGO-280 (Highly active siloxane-based substrate wetting additive), the thickening agent is magnesium aluminum silicate or/and bentonite; the leveling agent is -FL NO.77 or POLYFLOW NO.77; the drier is ZHV-10 drier or cobalt naphthenate. The aqueous-based acrylic acid modified alkyd resin preparation comprises introducing caprylic acid, capric acid, trimethylolpropane and phthalic acid In xylene, heating to 180-230degrees Celsius, stirring for 3-6 hours, distilling off xylene under reduced pressure, cooling reaction system to 170-190 degreesC, introducing maleic anhydride, stirring reaction for 1-3 hours cooling to 100-130 degreesC, introducing graphene oxide and ethylene glycol butyl ether, stirring for 0.5-1.5 hours, and cooling to 70-90 degreesC to obtain aqueous-based acrylic resin, where the mass ratio of graphene oxide and butyl glycol ether is 20:10-15:20-23:18-22:13-15:5-9:2-5:4 5-60, mixing hydroxyethyl acrylate and azobisisobutyronitrile uniformly to obtain a first mixed solution, mixing methyl methacrylate and butyl methacrylate, obtaining second mixed solution, for subsequent use, the mass ratio of hydroxyethyl acrylate, butyl methacrylate and azobisisobutyronitrile is 5:22-25:1-5:4-6:0.5-2; 3, introducing first mixed solution obtained in step (ii) to the aqueous-based acrylic resin obtained in step (i), and control the temperature to not exceed 90 degreesC during the addition, stirring for 0.5-1 hour at 70-90 degreesC, and then add the first mixed solution obtained in step (ii), stirring at 70-90 degreesC for 2-3 hours, adjusting the pH of the reaction system to 8-9 with aqueous ammonia aqueous, dispersing for 0.5-1.5 hours to obtain aqueous-based acrylic modified alkyd resin; where mass ratio of the obtained aqueous-based acrylic resin, the first mixed solution and the second mixed solution in step (i) is 10:1-2:1-2; the mass concentration of the aqueous ammonia is 15-25%.