Quantum Chemical Corporation

Enron Chemical Company

Peter D Becker

Kevin V Jachec

Webster W Kiang

Adhesives comprising carboxylic acid- or anhydride-grafted elastomeric polyester copolymers, and composite structures made therefrom, are disclosed.

Polyester-based adhesives and composite structures

Adhesive blends especially suitable for adhesion to polypropylene and gas barrier materials are disclosed, as are composite structures incorporating such blends, and methods of making such composite structures. The blends are preferably elastomer free, and comprise a mixture of an adhesion-promoting amount of an ethylene homopolymer about 0.1 to 30 wt. % of a non-elastomeric graft copolymer of polypropylene and a graft monomer comprising a polymerizable, ethylenically unsaturated carboxylic acid or derivative, and the balance a substantially non-elastomeric ethylene/propylene copolymer wherein ethylene comprises at least 5 wt. % of the copolymer. 2

Adhesive blends and composite structures

Adhesive blends especially suitable for adhesion to polypropylene and gas barrier materials are disclosed, as are composite structures incorporating such blends, and methods of making such composite structures. The blends are preferably elastomer free, and comprise a mixture of an adhesion-promoting amount of high molecular weight low density polyethylene having a narrow molecular weight distribution, about 0.1 to 30 wt. % of a non-elastomeric copolymer of propylene and a polymerizable, ethylenically unsaturated carboxylic acid or derivative, and the balance a non-elastomeric ethylene/propylene copolymer wherein ethylene comprises at least 5 wt. % of the copolymer.

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Roselle, IL, United States of America

Peter D Becker