▎ 摘　　要

NOVELTY - Sealing ring with strong weather resistance and high temperature resistance is prepared by (a) weighing natural rubber, nitrile rubber, modifier, carbon black, vulcanizing agent, accelerator, zinc oxide, crosslinking agent, bromoisocyanate, graphene dispersed emulsion and stearic acid, (b) adding natural rubber and graphene dispersion emulsion to internal mixer, banburying natural rubber for 10-16 minutes at 120-140?? C and rotor speed ratio of 1:1.3-1.5, adding nitriles rubber, mixing for 20-30 minutes, adding USE - Used as sealing ring with strong weather resistance and high temperature resistance. ADVANTAGE - The sealing ring has strong weather resistance, high heat resistance, large tensile strength and wear resistance, and is easy to damage in the environment factor, and without the vulcanization treatment, and does not have high elasticity, heat resistance and insolubility in the organic solvent, thus reduces the problem of service life of the sealing ring. DETAILED DESCRIPTION - Sealing ring with strong weather resistance and high temperature resistance comprises (a) weighing 10-30 pts. wt. natural rubber, 50-70 pts. wt. nitrile rubber, 11-19 pts. wt. modifier, 10-20 pts. wt. carbon black, 2-4 pts. wt. vulcanizing agent, 1-3 pts. wt. accelerator, 2-3 pts. wt. zinc oxide, 1-7 pts. wt. crosslinking agent, 2-4 pts. wt. bromoisocyanic acid, 15-20 pts. wt. graphene dispersion emulsion and 2-4 pts. wt. stearic acid, (b) banburying the raw materials by adding natural rubber and graphene dispersion emulsion into the internal mixer, setting the temperature of the internal mixer to 120-140°C, the speed ratio of the internal mixer rotor to 1:1.3-1.5, and banburying for 10-16 minutes, adding nitrile rubber, banburying for 20-30 minutes, adding stearic acid, and banburying for 4-8 minutes, (c) stirring and kneading the raw materials, pouring the heated raw materials, carbon black and bromoisocyanic acid into the stirring device and stirring evenly for 3-5 minutes, counterclockwise for 4-6 times for 3-5 minutes, stirring at 1200-1600 rotations/minutes for 5-7 minuites, adding the modifier, stirring at 100-140°C for 10 minutes until the mixture has no obvious color difference, (d) cleaning the mold by washing the required abrasive tools with clean water, rinsing for 3-5 times, dry the abrasive tools until there is no water residue on the abrasive tools, and cooling to room temperature, (e) injection molding by pouring the mixture into the mold after cleaning, and taking the method of full pouring, and using a plastic scraper to assist scraping, the pass rate is 98%, to obtain semi-finished sealing ring, (f) vulcanization treatment by vulcanizing the semi-finished sealing ring obtained for 20 minutes to obtain a vulcanized product, (g) demolding by using the tip of the copper rod to loosen the sealing ring along the overflow groove, without tearing the edge, demolding is done by filling the self-spraying mold release agent, the spray is misty, uniform, and the mold release effect is excellent, the speed is 1000 pieces/20 minutes, and the rough embryo of the sealing ring is obtained after demolding, (h) fine grinding of the rough billet and rough billet of the sealing ring is edged by a grinding device, the rough edges are trimmed, and the burrs are removed to obtain a finished sealing ring. DESCRIPTION OF DRAWING(S) - The drawing shows an isoaxial side view of the structure. 1Ring body 2Limiting hole 3Connecting groove