Compositions containing ethylene copolymers and resultant products

The process for the preparation of a composition consisting essentially of at least 60% by weight of at least one copolymer (A) of ethylene and at least one alpha olefin with 3 to 10 carbon atoms and a positive amount up to 40% by weight of a copolymer (B) based on ethylene and at least one anhydride of an unsaturated dicarboxylic acid, said copolymer (A) having a density between 0.850 and 0.890, a residual crystallinity between about 3 and 15%, and a crystalline J melting point between 100.degree. and 125.degree. C., and said copolymer (B) containing at least 80 mol-% of units derived from ethylene and at least 0.1 mol-% of units derived from the anhydride of the unsaturated dicarboxylic acid, comprising:

• (a) creating a homogeneous mixture, at a temperature between room temperature and 150.degree. C., of copolymer (B2) and a compound capable of modifying copolymer (B),
• (b) adding copolymer (B) to the mixture obtained, at a temperature between room temperature and 150.degree. C., and
• (c) adding copolymer (A) to the mixture obtained, at a temperature between about 150.degree. C. and 290.degree. C.;
• said copolymer (B2) containing:
• (a) from 80-99 mol-% of units derived from ethylene, and
• (b) from 1 to 20 mol-% of units derived form at least one ester of a C.sub.1 to C.sub.6 alkyl acrylate to metacrylate.