Thermal-resistant acid-alkali resistant conveyer belt covering adhesive and preparation method thereof

The invention relates to the field of rubber and discloses a thermal-resistant acid-alkali resistant conveyer belt covering adhesive which is of an upper layer structure and a lower layer structure, wherein the upper layer structure consists of the following components in parts by weight: 59-72 parts of polyurethane rubber, 202-5 parts of nitrile rubber, 3-6 parts of modified carbon nanotubes, 3-5parts of graphene, 1.5-4.8 parts of a vulcanizing agent and 0.2-0.5 part of an anti-aging agent; the lower layer structure consists of the following components in parts by weight: 84-92 parts of polyurethane rubber, 3-6 parts of modified carbon nanotubes, 3-5 parts of graphene, 1.5-4.8 parts of a vulcanizing agent and 0.2-0.5 part of an anti-aging agent; the weight ratio of the upper layer structure to the lower layer structure is 2:1. As the polyurethane rubber and the nitrile rubber are adopted as covering adhesive materials, the covering adhesive has functions of high temperature resistance and acid-alkali resista