KIT FOR IMPROVED OXYGEN BARRIER COATING AND PRODUCT COMPRISING AN IMPROVED OXYGEN BARRIER COATING
The present invention is related to a kit (K), comprising a composition for preparing an oxygen barrier coating ( 1 c) comprising a polymer having reactive hydroxyl groups, and a composition for preparing a layer selected from the group consisting of an ink layer ( 1 b), an overprint varnish layer ( 1 h) and an adhesive layer ( 1 i), wherein composition b) comprises a component that is capable of crosslinking with the polymer of composition a) when compositions a) and b) are applied one after another onto an uncoated or coated substrate ( 1 a).
1 - 15 . (canceled)
16 . A kit, comprising
a) a composition for preparing an oxygen barrier coating comprising a polymer having reactive hydroxyl groups,
b) a composition for preparing a layer selected from the group consisting of an ink layer and an overprint varnish layer,
wherein
composition b) comprises a component that is capable of crosslinking with the polymer of composition a) when compositions a) and b) are applied one after another onto an uncoated or coated substrate such that composition b) that comprises said component that is capable of crosslinking with the polymer of composition a) is applied adjacent to composition a).
17 . A kit, comprising
a) a composition for preparing an oxygen barrier coating comprising a polymer having reactive hydroxyl groups,
b) a composition for preparing a layer selected from the group consisting of an ink layer and an overprint varnish layer,
c) a composition c) for preparing an adhesive layer,
wherein at least one of compositions b) and c) comprises a component that is capable of crosslinking with the polymer of composition a) when compositions a) and b) and c) are applied one after another onto an uncoated or coated substrate such that at least one of compositions b) and c) that comprises said component that is capable of crosslinking with the polymer of composition a) is applied adjacent to composition a).
18 . The kit according to claim 16 , wherein said polymer in the composition a) is selected from the group consisting of
homopolymers selected from the group consisting of polyvinyl alcohol (PVOH), polyvinyl acetate (PVA), and polyvinyl butyral (PVB),
copolymers selected from the group consisting of ethylene-vinyl alcohol copolymer (EVOH), butenediol-vinyl alcohol copolymer (BVOH), vinyl acetate-vinyl alcohol copolymer, acrylate-vinyl alcohol copolymer, and acrylate-vinyl acetate copolymer, and esters and acetals of vinyl alcohol-containing copolymers, and
terpolymers of the monomers vinyl alcohol, vinyl acetate, ethylene, butenediol, and acrylate, and esters and acetals of vinyl alcohol-containing terpolymers,
or blends of such homopolymers, copolymers or terpolymers with an additional polymer.
19 . The kit according to claim 16 , wherein said component that is capable of crosslinking with the polymer of composition a) comprises at least one functional group that is selected from the group consisting of isocyanate, isocyanurate, carbodiimide, aziridine, epoxide, styrene maleic anhydride, silane and polyethylene imine.
20 . The kit according to claim 16 , wherein said composition b) is a 2K composition.
21 . The kit according to claim 17 , wherein said composition b) or said component c), or compositions b) and c), is a 2K composition.
22 . The kit according to claim 16 , wherein said composition b) is a composition for preparing a white ink layer.
23 . A coated product, comprising a substrate and a sequence of layers applied on at least one surface of said substrate, said sequence of layers comprising:
an oxygen-barrier coating layer comprising a polymer having reactive hydroxyl groups, and
a layer adjacent to said oxygen-barrier coating layer,
wherein said oxygen-barrier coating layer and said layer adjacent to said oxygen-barrier coating layer are crosslinked due to a reaction of said polymer in said oxygen-barrier coating layer with a component in said layer adjacent to said oxygen-barrier coating layer.
24 . A coated product, comprising a substrate and a sequence of layers applied on at least one surface of said substrate, said sequence of layers comprising:
an oxygen-barrier coating layer comprising a polymer having reactive hydroxyl groups,
a layer adjacent to said oxygen-barrier coating layer,
and an adhesive layer ( 1 i ) adjacent to said oxygen-barrier coating layer ( 1 c ),
wherein said oxygen-barrier coating layer and said layer or said adhesive layer, or said layer and said adhesive layer, adjacent to said oxygen-barrier coating layer are crosslinked due to a reaction of said polymer in said oxygen-barrier coating layer with a component in said layer or said adhesive layer, or said layer and said adhesive layer, adjacent to said oxygen-barrier coating layer.
25 . The product according to claim 23 , wherein said layer adjacent to said oxygen-barrier coating layer is an ink layer
26 . The product according to claim 25 , wherein said ink layer is provided on one color layer or a sequence of color layers applied onto said at least one surface of said substrate, and the oxygen-barrier coating layer is provided on said ink layer.
27 . The product according to claim 23 , wherein said layer adjacent to said oxygen-barrier coating layer is an overprint varnish layer.
28 . The product according to claim 27 , wherein said oxygen-barrier coating layer is provided on one color layer or white ink layer or a sequence of color and white ink layers applied onto said at least one surface of said substrate, and the overprint varnish layer is provided on said oxygen-barrier coating layer.
29 . The product according to claim 23 , wherein said layer adjacent to said oxygen-barrier coating layer is an adhesive layer.
30 . The product according to claim 24 , wherein said oxygen-barrier coating layer is provided on one or color or white ink layer or a sequence of color and white ink layers applied onto said at least one surface of said substrate, and on said oxygen-barrier coating layer there is provided said adhesive layer.
31 . The product according to claim 30 , wherein a further substrate is provided onto a free surface of said adhesive layer.
32 . The product according to claim 23 , wherein said product is a flexible packaging.
33 . A method for making a coated product, comprising the steps:
a) providing a substrate having a surface;
b) providing a liquid composition a) for preparing an oxygen barrier coating layer, the liquid composition a) comprising a polymer having reactive hydroxyl groups;
c) providing a liquid composition b) for preparing a layer selected from the group consisting of an ink layer and an overprint varnish layer, which comprises a component that is capable of crosslinking with the polymer of composition a);
d) applying, in either sequence, the liquid composition a) and the liquid composition b) onto the surface of the substrate to form a sequence of layers comprising an oxygen barrier layer and an ink layer or an overprint varnish layer adjacent to said oxygen barrier layer,
e) crosslinking the component in composition b) with the polymer in composition a).
34 . A method for making a coated product, comprising the steps:
a) providing a substrate having a surface;
b) providing a liquid composition a) for preparing an oxygen barrier coating layer, the liquid composition a) comprising a polymer having reactive hydroxyl groups;
c) providing a liquid composition c) for preparing an adhesive layer ( 1 i ), wherein at least one of compositions b) and c) comprises a component that is capable of crosslinking with the polymer of composition a);
d) applying, in either sequence, the liquid composition a) and the liquid composition b) onto the surface of the substrate to form a sequence of layers comprising an oxygen barrier layer and an ink layer or an overprint varnish layer adjacent to said oxygen barrier layer;
e) applying the liquid composition c) onto the sequence of layers obtained in step e), so as to form an adhesive layer;
f) crosslinking the component in at least one of the compositions b) and c) with the polymer in composition a).
35 . The method according to claim 33 , further comprising the step of applying at least one color layer onto the surface of said substrate, and applying, in either sequence, the liquid composition a) and the liquid composition b) onto the surface of the at least one color layer to form a sequence of layers comprising an oxygen barrier layer and an ink layer or an overprint varnish layer adjacent to said oxygen barrier layer.
36 . The method according to claim 33 , wherein the steps of applying and crosslinking are performed using an in-line process.