Heat-resistant type hot melt adhesive

The invention discloses a heat-resistant type hot melt adhesive. The heat-resistant type hot melt adhesive comprises the following materials in parts by weight: 90-100 parts of maleic anhydride grafted polyethylene, 10-14 parts of polymethacrylic acid butyl ester, 10-13 parts of fully-refined paraffin wax, 3-5 parts of glycerol triacetate, 1-2 parts of 4,4'-diaminodiphenylmethane, 0.3-0.5 part of 2-(morpholinothio)benzothiazole, 1-2 parts of N-[3-(trimethoxysilyl)propyl]ethylenediamine, 1-2 parts of sodium metasilicate, 5-7 parts of oxidized polyethlene wax and 10-14 parts of a viscosifying agent. The heat-resistant type hot melt adhesive disclosed by the invention is good in heat resistance, is simple to prepare, can be used for preparing PE-RT (Polyethylene of Raised Temperature resistance) steel-wire mesh skeleton pipes, has good effect on preparation of the PE-RT steel-wire mesh skeleton pipes for conveying hot water or other high-temperature mediums, and is safe and environmentalally friendly without pol