METHOD FOR BONDING HARDLY ADHERABLE MATERIAL

Japanese Patent JP3786380

B2

PROBLEM TO BE SOLVED: To improve the adhesive strength in adhering a hardly adherable material without the necessity for a troublesome surface treatment by incorporating a hindered amine compd. having a piperidine backbone into the material. SOLUTION: A hardly adherable material (e.g. a polyolefin resin, a fluororesin, an ethylene-propylene copolymer, an ethylene-propylene-diene terpolymer, a polyacetal resin, or a silicone resin) is blended with 0.0001-10wt.% hindered amine compd. having a piperidine backbone represented by the formula [wherein X is H, (substd.) alkyl, alkenyl, alkynyl, (substd.) aralkyl, aliph. acyl, alkoxycarbonyl, or aralkoxycarbonyl] and then molded. After the surfaces of thus obtd. moldings are cleaned, one of them is coated with an α- cyanoacrylate adhesive, stuck on and pressed to another, and cured.