Adhesive composition based on ethylene copolymers, useful for extrusion-coating and extrusion-lamination on a variety of supports

A multilayer structure comprising:

• a) an adhesive composition comprising at least one ethylene polymer or copolymer, at least one unsaturated carboxylic acid ester type comonomer, and at least one functional comonomer, wherein said unsaturated carboxylic acid ester type comonomer is at least one alkyl methacrylate, the alkyl group having from 1 to 24 carbon atoms, and wherein said alkyl methacrylate(s) are present at from 10 to 25 weight percent of the composition and wherein said functional comonomer is maleic anhydride, the level of which is between 0.05% and 0.9% by weight of the composition, wherein the adhesive composition is formed by high-pressure radical polymerization of all the comonomers in a single step, wherein the adhesive composition is extruded at temperatures ranging from 290° C. to 300° C. to form the multilayer structure, and
• b) a support, wherein said support is aluminum film;
• wherein said multi-layer structure is formed by an extrusion-coating process or an extrusion lamination process.

A multilayer structure comprising:

• a) an adhesive composition comprising at least one ethylene polymer or copolymer, at least one unsaturated carboxylic acid ester type comonomer, and at least one functional comonomer, wherein said unsaturated carboxylic acid ester type comonomer is at least one alkyl methacrylate, the alkyl group having from 1 to 24 carbon atoms, and wherein said alkyl methacrylate(s) are present at from 10 to 25 weight percent of the composition and
• wherein said functional comonomer comprises at least one reactive function in the form of an acid, anhydride or epoxide group, the level of which is less than 1% by weight of the composition, wherein the adhesive composition is extruded at temperatures ranging from 310° C. to 320° C. to form the multilayer structure, and
• b) a support, wherein said support is chosen from aluminum film, wherein said multi-layer structure is formed by an extrusion-coating process or an extrusion lamination process.