Coextrusion binder based on a mixture of cografted polyolefins
AssigneeElf Atochem S.A.
InventorsPatrice Robert, Laurent Breysse
Life of this patent
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Abstract
The invention relates to a mixture which is useful as a coextrusion binder, comprising: at least (A) one polyethylene or one ethylene copolymer, at least (B) chosen from (B1) polypropylene or a propylene copolymer, (B2) poly(1-butene) homo- or copolymer, and (B3) polystyrene homo- or copolymer, the mixture of (A) and (B) being grafted with a functional monomer, this grafted mixture itself optionally being diluted in at least one polyolefin (C) or in at least one polymer (D) of elastomeric nature or in a mixture of (C) and (D). The invention also relates to polyolefin/binder/polyamide, EVOH, polyester or metal structures. The invention is useful for making packaging.
Claims18
Mixture which is useful as a coextrusion binder, comprising:
- at least (A) one polyethylene or one ethylene copolymer,
- at least (B) selected from (B1) polypropylene or a propylene copolymer, (B2) poly(l-butene) homo- or copolymer, and (B3) polystyrene homo- or copolymer, the mixture of (A) and (B) being grafted with a functional monomer, wherein the functional monomer is selected from the group consisting of acid chlorides, isocyanates, oxazolines, epoxides, amines, hydroxides, and carboxylic acids and derivatives thereof, the carboxylic acids being selected from the group consisting of acrylic acid, fumaric acid and unsaturated dicarboxylic acids having from 5 to 20 carbon atoms.
Mixture which is useful as a coextrusion binder, comprising:
- at least (A) one polyethylene or one ethylene copolymer,
- at least (B) selected from (B1) polypropylene or a propylene copolymer, (B2) poly(1-butene) homo- or copolymer, and (B3) polystyrene homo- or copolymer, the mixture of (A) and (B) being grafted with a functional monomer, this grafted mixture itself being diluted in at least one polyolefin (C) or in at least one polymer (D) of elastomeric nature or in a mixture of (C) and (D).
Multilayer structure comprising:
- a layer comprising a binder consisting of a mixture comprising at least (A) one polyethylene or one ethylene copolymer, and at least (B) selected from (B1) polypropylene or a propylene copolymer, (B2) poly(1-butene) homo- or copolymer, and (B3) polystyrene homo- or copolymer, the mixture of (A) and (B) being grafted with a functional monomer, this grafted mixture itself being diluted in at least one polyolefin (C) or in at least one polymer (D) of elastomeric nature or in a mixture of (C) and (D);
- and, directly attached thereto, a layer of nitrogen-containing or oxygen-containing polar resin optionally a layer (E) of a polyamide resin, of a saponified copolymer of ethylene and of vinyl acetate, of a polyester resin or of an inorganic oxide deposited on a polymer optionally polyethylene, polyethylene terephthalate or EVOH, or alternatively a metal layer.
Mixture which is useful as a coextrusion binder, comprising:
- at least (A) one polyethylene or one ethylene copolymer,
- at least (B) selected from (B1) polypropylene or a propylene copolymer, (B2) poly(1-butene) homo- or copolymer, and (B3) polystyrene homo- or copolymer, the mixture of (A) and (B) being grafted with a functional monomer, wherein the functional monomer is selected from the group consisting of acid chlorides, isocyanates, oxazolines, epoxides, amines, hydroxides, and carboxylic acids and derivatives thereof, the carboxylic acids being selected from the group consisting of acrylic acid, fumaric acid and unsaturated dicarboxylic acids having from 5 to 20 carbon atoms,
- wherein (A) comprises 75 mol % of ethylene;
- and
- wherein (B) comprises 75 mol % of propylene.
Dependencies are inferred from the claim text.