Coating and production thereof by inkjet printing methods

Abstract

The present invention relates to coatings and to a method for surface finishing, in particular for producing durable and stable surface coatings using ink jet printing methods. The coating according to the invention comprises a first layer, which can be produced from one or more ink jet-capable inks, and a second layer, which can be produced from one or more top coats, wherein at least the first layer is applied using an ink jet print head.

1 - 26 . (canceled) 
     
     
         27 . A coating comprising a first coat, which can comprise one or more inks, and a second coat, which can comprise one or more covering layers, wherein at least one ink is a UV curing ink and at least one covering layer is a UV curing lacquer or a two-component lacquer, wherein said two-component lacquer comprises a binding component and a curing component. 
     
     
         28 . The coating according to  claim 27 , wherein said first coat is applied to a coat, which can comprise one or more primers. 
     
     
         29 . The coating according to  claim 27 , wherein at least one ink comprises pigments, oligomers, and/or reactive diluents. 
     
     
         30 . The coating according to  claim 27 , wherein at least one ink contains from 0 to 15% of pigment, from 5 to 50% of oligomer, and from 20 to 80% of monofunctional, difunctional and/or trifunctional reactive diluent based on the weight of the ink. 
     
     
         31 . The coating according to  claim 27 , wherein said two-component lacquer contains said binding component and said curing component in a mixing ratio of from 1:0.7 to 1:1.2. 
     
     
         32 . The coating according to  claim 27 , wherein said binding component contains polyalcohols and said curing component contains isocyanates. 
     
     
         33 . The coating according to  claim 27 , wherein said binding component contains epoxy resins and said curing component contains NH-functional substances. 
     
     
         34 . The coating according to  claim 27 , wherein the binding component contains from 10 to 70% of polyalcohols or epoxy resins, from 0 to 2% of flatting agent, from 0 to 5% of waxes, from 0 to 5% of accelerators, from 0 to 3% of silicones, from 0 to 10% of pigments, and from 0 to 10% of dyes based on the total weight of the binding component. 
     
     
         35 . The coating according to  claim 28 , wherein at least one primer contains a binding component and a curing component in a mixing ratio of from 1:0.7 to 1:1.2. 
     
     
         36 . The coating according to  claim 35 , wherein said binding component contains polyalcohols and said curing component contains isocyanates. 
     
     
         37 . The coating according to  claim 35 , wherein said binding component contains epoxy resins and said curing component contains NH-functional substances. 
     
     
         38 . The coating according to  claim 28 , wherein said primer exhibits a binding component containing from 10 to 70% of polyalcohols or epoxy resins, from 0 to 10% of flatting agent, from 0 to 5% of waxes, from 0 to 5% of accelerators, from 0 to 1% of dispersing agent, from 0 to 3% of wetting agent, from 0 to 3% of silicones, from 0 to 60% of pigments, and from 0 to 60% of fillers based on the total weight of said binding component. 
     
     
         39 . The coating according to  claim 27 , wherein the UV curing lacquer contains from 5 to 50% of oligomer and from 20 to 80% of monofunctional, difunctional and/or trifunctional reactive diluent based on the weight of the covering layer. 
     
     
         40 . The coating according to  claim 27 , wherein the covering layer wets the first coat only partially. 
     
     
         41 . A method for the application of a coating according to  claim 27  to a surface, comprising (a) printing at least one UV curing ink by means of an inkjet printer, (b) curing the ink by irradiation with UV light or the commencing gelling of the ink by irradiation with light exhibiting wavelengths of from 250 to 450 nm, (c) applying at least one covering coat, (d) curing the covering coats in UV light. 
     
     
         42 . The method according to  claim 41 , wherein prior to printing of the ink at least one primer is applied to the surface to be coated or to the substrate to be coated for the production of a primer-containing coat. 
     
     
         43 . The method according to  claim 41 , wherein the covering layer is printed by means of an inkjet printer or is applied by spray coating. 
     
     
         44 . The method according to  claim 41 , wherein the primer is applied by spray coating. 
     
     
         45 . The method as defined in  claim 41 , wherein the inks and/or covering layers are printed by means of an inkjet printing head capable of moving in three vertically superposed planes. 
     
     
         46 . The method according to  claim 41 , wherein items of plastics material are coated, in which the plastics materials are selected from the group consisting of plastics materials produced from vinyl chloride, acrylic-butadiene-styrene copolymer, acrylic-butadiene-styrene copolymer/polycarbonate, polycarbonate, acrylonitrile-styrene-acrylate, filler-free and filled polypropylene, filler-free and filled polyamide, poly(oxymethylene), poly(butylene terephthalate), thermoplastic polyester elastomers and ethylene-propylene-diene rubber. 
     
     
         47 . The method according to  claim 41 , wherein PVC profiles are coated.