Environment-friendly modified chlorinated polypropylene adhesive and preparation method thereof

The invention discloses environment-friendly modified chlorinated polypropylene (CPP) adhesive and a preparation method thereof. The preparation method comprises the following steps: (1) adding 100 weight parts of chlorinated polypropylene, 15 to 25 weight parts of monomers and 200 to 300 weight parts of solvent to a reactor provided with a stirring device, heating until the temperature is increased to 70 to 90 DEG C; (2) adding 3 to 5 weight parts of initiator after the monomers are completely dissolved, further heating to the reaction temperature of 70 to 90 DEG C; and (3) stop heating after the reaction is finished, precipitating the product by acetone, then, carrying out the suction-filtration by a Buchner funnel, oven-drying, dissolving the product by 200 weight parts of solvent, and adding 5 to 15 weight parts of tackifier to obtain the modified CPP adhesive. By using the environment-friendly solvent method to graft modified CPP and further adding acid anhydride, acrylate and nitrogenous monomers, the monomers can be grafted onto the CPP under the action of the initiator, so the modified CPP adhesive has high adhesion to the surface of thermoplastic polyolefin substrates or metals; and the modified CPP adhesive of the invention has the advantages of simple preparation process, non-toxic application, high cost performance ratio, and stronger adhesion to metals or non-polar polymers.