| abstract |
An adhesive composition comprises by weight:n (A) 2 to 98% of an ethylene copolymer comprising from 50 to 90% of ethylene, up to 49% by weight of an alkyl ester of a C3 to 8 α,ß-unsaturated carboxylic acid and from 0.5 to 10% of maleic anhydride; (B) 2 to 98% of a crystalline polyethylene resin comprising (i) an ethylene homopolymer or (ii) a copolymer of ethylene and an α-olefin having 3 or more carbon atoms, the ethylene content being 90% by weight or more; and (C) 2 to 50%, of a non-crystalline or low crystalline olefin copolymer rubber comprising a copolymer of ethylene and an α-olefin having 3 or more C atoms, e.g. propylene, and optionally up to 3% of a non-conjugated diene ; n the sum of the monomers in (A) and of components (A), (B) and (C) being each 100%. n (B) and (C) are respectively of high and low rigidity of flexural rigidity modulus respectively 1500 kg/cm² or more and below 1500 kg/cm². n The composition has good adhesion to polar materials, e.g. to copolymers of ethylene and PVA. |