▎ 摘　　要

NOVELTY - Silicate heat-resistant sheath material comprises 100-104 pts. wt. styrene-ethylene-butylene-styrene copolymer, 65-68 pts. wt. stearic acid, 29-31 pts. wt. polypropylene, 21-23 pts. wt. polypropylene grafted maleic anhydride, 3-4 pts. wt. antioxidant B215, 81-83 pts. wt. magnesium, 4.3-5 pts. wt. graphene, 1.6-1.7 pts. wt. silane coupling agent A-171, 8-9 pts. wt. absolute ethyl alcohol, 7.5-8.5 pts. wt. silicate, 6-7 pts. wt. polybutyl methacrylate, calcium-zinc stabilizing agent, 2-3 pts. wt. C8-309, 2-3 pts. wt. stearic acid and 7-8 pts. wt. high temperature resistant epoxy resin. USE - Silicate heat-resistant sheath material. ADVANTAGE - The silicate heat-resistant sheath material is waterproof and flame-retardant. It has high temperature resistant, excellent mechanical property, long service life and high performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing silicate heat-resistant sheath material which involves: (A) putting magnesium hydroxide in blast oven, drying at 110 degrees C for 4 hours, adding silane coupling agent A-171 into absolute ethyl alcohol, stirring at speed of 500 revolutions/minute for 30 minutes, then spraying it on the dried magnesium hydroxide, adding into a high speed mixer, adding graphene and stirring at 2000 revolutions/minute for 30 minutes at normal temperature; (B) raising the temperature to 60 degrees C, continuously stirring for 30 minutes, then drying at 110 degrees C for 3 hours to obtain flame retardant compound; (C) mixing the styrene-ethylene-butylene-styrene copolymer, polypropylene, polypropylene grafted maleic anhydride, heating in blast oven at 80 degrees C for 4 hours; (D) mixing styrene-ethylene-butylene-styrene copolymer and stearic acid, putting into high speed mixer, stirring at 1000 revolutions/minute for 20 minutes, taking out and standing for 12 hours, fully swelling the styrene-ethylene-butylene-styrene copolymer in stearic acid to obtain the oily styrene-ethylene-butylene-styrene copolymer; (E) putting the polypropylene, polypropylene grafted maleic anhydride into a double-roller at 170 degrees C, plasticating in open type plastic refining machine for 10 minutes, adding oily styrene-ethylene-butylene-styrene copolymer, antioxidant B215, continuously mixing for 20 minutes uniformly, discharging, crushing and drying into blast oven for 2 hours to obtain the mixed material; (F) mixing the silicate with stearic acid, putting into the ball mill for milling for 1 hour, adding polymethyl acrylate, heating at 70 degrees C and reacting for 90 minutes into the double-screw extruder, adding high temperature resistant epoxy resin, controlling the rotation speed of the screw to 200 revolutions/minute, extruding at 140 degrees C and granulating to obtain mixed material; (G) mixing the complex flame retardant, base material, the mixture and other remaining components into the high-speed mixer, mixing at 170 degrees C with speed of 500 revolutions/minute for 20 minutes, discharging the material into the flat vulcanizing machine, hot pressing at 180 degrees C and cold pressing at room temperature; and (H) crushing into particles, adding the particles into double screw extruder, extruding and granulating, and drying at 80 degrees C for 4 hours to obtain the desired product.