▎ 摘　　要

NOVELTY - Preparing electromagnetic shielding paint containing crystalline gutta percha involves purifying gutta-percha gum and epoxidizing to obtain epoxidized gutta-percha gum, and treating conductive filler with a coupling agent, adding conductive filler to the three-necked flask and stirring, weighing the epoxidized gutta-percha gum into the three-necked flask, add the solvent, and stirring in a water bath at 50-55 degrees C, and using ultrasonic cells ultrasonic pulverizer for 1-2 hours. The matrix resin is dissolved in the solvent, poured into a three-necked flask and stirred to make completely dissolved, added additives to the mixture, and used an ultrasonic cell pulverizer to ultrasonic for 1-2 hours, curing agent is added to the system, stirred and brushed on the mold, placed at room temperature for 1-2 days and put in an oven at 50-55 degrees C to dry for three days, and solidified into a film, natural gutta-percha gum is selected. USE - Method for preparing electromagnetic shielding paint containing crystalline gutta percha used for electromagnetic shielding protection of electronic machinery and precision instruments. ADVANTAGE - The method improves brittleness of the coating, increases toughness of the coating, improves conductivity and electromagnetic shielding performance of the coating. DETAILED DESCRIPTION - Preparing electromagnetic shielding paint containing crystalline gutta percha involves purifying gutta-percha gum and epoxidizing to obtain epoxidized gutta-percha gum, and treating conductive filler with a coupling agent, adding conductive filler to the three-necked flask and stirring, weighing the epoxidized gutta-percha gum into the three-necked flask, add the solvent, and stirring in a water bath at 50-55 degrees C, and using ultrasonic cells Ultrasonic pulverizer for 1-2 hours. The matrix resin is dissolved in the solvent, poured into a three-necked flask and stirred to make completely dissolved, added additives to the mixture, and used an ultrasonic cell pulverizer to ultrasonic for 1-2 hours, curing agent is added to the system, stirred and brushed on the mold, placed at room temperature for 1-2 days and put in an oven at 50-55 degrees C to dry for three days, and solidified into a film, natural gutta-percha gum is selected, and its molecular weight is 50000-100000, epoxy degree of epoxidized gutta percha is 10-30%, 100 pts. wt. epoxidized gutta percha and matrix resin, 90-100 pts. wt. matrix resin, 10-0 pts. wt. epoxidized gutta percha, 7-8 pts. wt. filler, 750-1000 pts. wt. solvent, 1-2 pts. wt. coupling agent, 2-3 pts. wt. auxiliary agent, and 30-60 pts. wt. curing agent, where ratio of epoxidized eucommia gum to matrix resin ranges from 2:98-10:90.