▎ 摘　　要

NOVELTY - Industrial rubber product with ultra-low zinc content comprises rubber tape, rubber hose, rubber sealing washer, rubber roller, rubber plate, and rubber lining. The industrial rubber product also includes single-atom zinc material, rubber, accelerator, dispersant, softener, anti-aging agent, and functional filler. The single-atom zinc material is carrier and transition metal. The carrier is nano calcium carbonate. The transition metal is zinc. The transition metal is anchored on the defect site on the surface of carrier in the form of a single atom. The mass ratio of transition metal and the support contained in monoatomic zinc material is 1:5-1:10. The single-atom zinc material is prepared by (1) subjecting the carrier to ball milling treatment, (2) adding carrier metal hydroxide aqueous solution, filtering, drying, and grinding, and (3) mixing carrier with a zinc metal salt solution, and (4) subjecting solid powder to activation treatment, and obtaining the target product. USE - The industrial rubber product is useful in a rubber vulcanizing agent, accelerator, dispersant, softening agent, anti-aging agent and functional filler. ADVANTAGE - The industrial rubber product has high tensile strength and tensile elongation, mechanical property and durability, and excellent sanitary safety and ultraviolet resistance performance. The method adopts single-atom zinc material to replace 997 high-grade zinc oxide in the traditional medical rubber industry as the rubber vulcanization activator, ensures that the physical properties of the rubber are qualified, greatly reduces the amount of zinc, reduces the heavy metal residual pollution to the environment, and makes industrial rubber products with higher tensile strength and tensile elongation. DETAILED DESCRIPTION - Industrial rubber product with ultra-low zinc content comprises rubber tape, rubber hose, rubber sealing washer, rubber roller, rubber plate, and rubber lining. The industrial rubber product also includes single-atom zinc material, rubber, accelerator, dispersant, softener, anti-aging agent, and functional filler. The single-atom zinc material is carrier and transition metal. The carrier is nano calcium carbonate. The transition metal is zinc. The transition metal is anchored on the defect site on the surface of the carrier in the form of a single atom. The mass ratio of the transition metal and the support contained in the monoatomic zinc material is 1:5-1:10. The single-atom zinc material is prepared by (1) subjecting the carrier to ball milling treatment to obtain a carrier with a particle size ≤ 200nm, (2) adding the carrier to 1 mol/l metal hydroxide aqueous solution, where the mass ratio of 11 mol/l metal hydroxide aqueous solution to carrier is 1.0-1.2:1, the rotation speed is 800-1000 revolutions/minute, the temperature is raised to 75-85°C, and the reaction is complete for 35-40 hours, constructing sufficient defect sites on the surface of the carrier, filtering, drying, and grinding, and (3) mixing the carrier with a zinc metal salt solution with a zinc ion content of 100-200 g/l, where the mass ratio of the zinc metal salt solution and the carrier prepared in step 2 with a zinc ion content of 100-200 g/l is 1:1, heating to 58-65°C, fully stirring for 16-24 hours, removing the supernatant, centrifuging, and placing in a blast drying oven at 100-120°C for 10-14 hours, drying, ball milling the obtained material, and (4) subjecting the solid powder to activation treatment, where the calcination temperature under an argon atmosphere is 200-600°C, the heating rate is 2-5°C/minute, the calcination time is 2-6 hours, and obtaining the target product An INDEPENDENT CLAIM is also included for method for preparing industrial rubber product with ultra-low zinc content comprising (1) batching ethylene propylene diene monomer rubber, single-atom zinc material, stearic acid, carbon black, white carbon black, paraffin oil, N-cyclohexyl -2-benzothiazole sulfenamide (accelerator CZ) and polyethylene glycol, carrying out banburying, open milling subsequently, and allowing to stand 24-48 hours to obtain rubber compound, (2) extruding, calendering, cooling and cutting the mixed rubber in sequence, and allowing to stand for 12-24 hours to obtain a preformed film, (3) vulcanizing the preformed film, setting the vulcanization temperature to 140-160°C, the vulcanization pressure to 120-150 kg/cm2, and the vulcanization time to 6-8 minutes, and (4) punching and cleaning the vulcanized rubber to obtain the final rubber water stopping belt.