▎ 摘　　要

NOVELTY - A foam material comprises 55-65 pts. wt. natural rubber, 21-28 pts. wt. butyl rubber, 8-12 pts. wt. butadiene rubber, 4-6 pts. wt. nano medium, 4-5 pts. wt. phenylene oxide silicon glycol, 2.5-3.5 pts. wt. hydroxy-terminated polydimethylsiloxane, 2-2.5 pts. wt. graphene, 1.5-2 pts. wt. zinc oxide, 2.5-3 pts. wt. stearic acid, 2-2.4 pts. wt. zinc stearate, 2-2.5 pts. wt. crosslinking agent, 1.8-2.2 pts. wt. foaming agent and 4-5 pts. wt. lubricant, where lubricant is mixture of maleic anhydride grafted polyethylene and ethylene bisstearamide. The mass ratio of maleic anhydride grafted polyethylene and ethylene bis-stearamide is 1:(0.17-0.22). The crosslinking agent is a mixture of rubber crosslinking agent VP-4L and isocyanate Desmodur BL3175A (RTM: Blocked aliphatic polyisocyanate based on hexamethylene diisocyanate. The nano medium is nano calcium carbonate, and foaming agent is azodicarbonamide foaming agent. USE - Graphene natural rubber composite foam material for shoe soles of old people. ADVANTAGE - Since the composition of raw materials is selected and the content of each raw material is optimized, the obtained graphene natural rubber composite foam material has excellent anti-slip effect, high tensile strength, enhanced mechanical properties, durability, low density and ultra-light weight. DETAILED DESCRIPTION - The foam material comprises 55-65 pts. wt. natural rubber, 21-28 pts. wt. butyl rubber, 8-12 pts. wt. butadiene rubber, 4-6 pts. wt. nano medium, 4-5 pts. wt. phenylene oxide silicon glycol, 2.5-3.5 pts. wt. hydroxy-terminated polydimethylsiloxane, 2-2.5 pts. wt. graphene, 1.5-2 pts. wt. zinc oxide, 2.5-3 pts. wt. stearic acid, 2-2.4 pts. wt. zinc stearate, 2-2.5 pts. wt. crosslinking agent, 1.8-2.2 pts. wt. foaming agent and 4-5 pts. wt. lubricant, where lubricant is mixture of maleic anhydride grafted polyethylene and ethylene bisstearamide. The mass ratio of maleic anhydride grafted polyethylene and ethylene bis-stearamide is 1:(0.17-0.22). The crosslinking agent is a mixture of rubber crosslinking agent VP-4L and isocyanate Desmodur BL3175A (RTM: Blocked aliphatic polyisocyanate based on hexamethylene diisocyanate) of Bayer, Germany, where the mass ratio of rubber crosslinking agent VP-4L and isocyanate is 1:(0.14-0.18). The nano medium is nano calcium carbonate, and the foaming agent is azodicarbonamide foaming agent. An INDEPENDENT CLAIM is included for method for preparing graphene natural rubber composite foaming material for shoe soles of old people, which involves (1) weighing the above-mentioned raw materials of composite foamed material, (2) adding natural rubber to internal mixer, ultrasonically reacting for 10-15 minutes at 120-125degreesC, discharging the material, and storing natural rubber at room temperature for more than 48 hours, (3) adding the raw material components except cross-linking agent and foaming agent to internal mixer for mixing, and when temperature reaches 100-105degreesC, turning the material for the second time, and mixing for 7-10degreesC, turning again, adding crosslinking agent to internal mixer and mixing for 4-6 minutes, (5) adding foaming agent to internal mixer and mixing for 7-9 minutes to obtain mixture, (6) mold foaming or injecting foaming mixture.