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US 2008/0163978 A1Published application
Process for producing multi-layer structures having improved metal adhesion
OwnerMaged G. Botrosinventor
Life of this patent
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Abstract
Extrusion and lamination processes are provided for producing multi-layer constructions wherein metal and polyolefin layers are bonded through a tie-layer comprising a base resin and two functionalized ethylene polymers.
Claims20
An extrusion process for the production of multi-layer structures comprising:
- (a) providing a first functionalized ethylene polymer component having an α,β-ethylenically unsaturated carboxylic acid incorporated by grafting or copolymerization;
- (b) providing a second functionalized ethylene polymer component having maleic anhydride incorporated by grafting;
- (c) combining (a) and (b) with a base resin selected from the group consisting of ethylene homopolymers, copolymers of ethylene and C3-8 α-olefins and copolymers of ethylene and vinyl esters of C2-4 aliphatic acids to form a tie-layer adhesive composition containing 10 to 90 weight percent of a mixture of said first and second functionalized ethylene polymer components and 90 to 10 weight percent base resin, the weight ratio of (a):(b) in said mixture ranging from 8:1 to 1.5:1;
- (d) melt blending the tie-layer adhesive composition;
- and
- (e) extruding the melt blended tie-layer adhesive composition to form a multi-layer construction wherein the adhesive is disposed between a metal layer and a polyolefin layer.
3 more elements
A lamination process for the production of multi-layer structures comprising:
- (a) providing a first functionalized ethylene polymer component having an α,β-ethylenically unsaturated carboxylic acid incorporated by grafting or copolymerization;
- (b) providing a second functionalized ethylene polymer component having maleic anhydride incorporated by grafting;
- (c) combining (a) and (b) with a base resin selected from the group consisting of ethylene homopolymers, copolymers of ethylene and C3-8 α-olefins and copolymers of ethylene and vinyl esters of C2-4 aliphatic acids to form a tie-layer adhesive composition containing 10 to 90 weight percent of a mixture of said first and second functionalized ethylene polymer components and 90 to 10 weight percent base resin, the weight ratio of (a):(b) in said mixture ranging from 8:1 to 1.5:1;
- (d) melt blending the tie-layer adhesive composition;
- (e) forming the melt blended tie-layer adhesive composition into a film;
- and
- (f) forming a multi-layer laminate wherein the tie-layer adhesive film is disposed between a metal layer and a polyolefin layer.
4 more elements
Dependencies are inferred from the claim text.