▎ 摘　　要

NOVELTY - Aqueous acrylic composite thermal insulation coating comprises 100 pts. wt. acrylic mixed emulsion, 80-120 pts. wt. hollow glass beads, 8-13 pts. wt. iron oxide red, 9-16 pts. wt. nano silica, 1-3 pts. wt. modified graphene oxide, 1-3 pts. wt. ionic liquid dispersant, 5-8 pts. wt. plasticizer, 0.1-3 pts. wt. stabilizer, and 70-80 pts. wt. water, where the acrylic mixed emulsion is obtained by emulsion polymerization of 25-30 pts. wt. methacrylic acid, 35-40 pts. wt. methyl methacrylate, 5-8 pts. wt. epoxy resin, 8-12 pts. wt. butyl acrylate, 3-5 pts. wt. vinyl trimethoxysilane, and 5-12 pts. wt. hexafluorobutyl acrylate, the epoxy resin includes glycidyl ether epoxy resin, including diglycidyl phthalate, diglycidyl hexahydrophthalate, diglycidyl terephthalate, diglycidyl isophthalate and/or diglycidyl tetrahydrophthalate. USE - Used as aqueous acrylic composite thermal insulation coating. ADVANTAGE - The coating has better heat insulation effect. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing aqueous acrylic composite thermal insulation coating, comprising (i) adding graphene oxide to dimethylformamide and dispersing ultrasonically for 30 minutes to obtain suspension of graphene oxide, and adding bis (3-triethoxysilanepropyl) tetrasulfide, silane coupling agent 10 times the mass of graphene oxide, further ultrasonically dispersing for 1-3 hours, reflux reacting in water bath for 24 hours, vacuum filtering modified graphene oxide with complete reaction and repeatedly washing with dimethylformamide and distilled water to neutrality, vacuum drying and grounding to obtain modified graphene oxide, (ii) preparing sodium lauryl sulfate and OP-10 emulsifier in emulsifier solution with mass ratio of 1:1.5, adding vinyl trimethoxysilane, hexafluorobutyl acrylate and part of butyl acrylate, and methyl methacrylate to emulsifier solution at high speed and sonicate to obtain shell pre-emulsion, adding remaining butyl acrylate, remaining methyl methacrylate, all epoxy resins, all methacrylic acid and emulsifier aqueous solutions, and sodium bicarbonate aqueous solution to the reactor, high-speed stirring at 50 degrees C for 30 minutes, continuously increasing temperature to 75-80 degrees C, and performing temperature-preserving reaction for 20-30 minutes to obtain core layer pre-emulsion, adding 20% aqueous solution of K2S2O8 initiator, and keeping the seed emulsion after incubating for 30-50 minutes, adding remaining initiator aqueous solution and prepared shell pre-emulsion dropwise to seed emulsion, keeping reaction for 60-80 minutes, and cooling down to obtain silicon fluoride and epoxy resin modified acrylic emulsion, and (iii) adding hollow glass beads, iron oxide red, nano silica, modified graphene oxide, ionic liquid dispersant, and plasticizer to deionized water at high speed to make a slurry, adding acrylic emulsion under condition of high-speed stirring, adding stabilizer to raise temperature to 40-50 degrees C and reacting for 30-50 minutes, adding small amount of ammonia water dropwise to adjust PH value to 7-8, and cooling material and discharging to obtain composite heat-insulating coating.