• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:

    公开号:BE1019796A3
    申请号:E2011/0503
    申请日:2011-08-24
    公开日:2012-12-04
    发明作者:Stijn Vermeulen
    申请人:Ivc N V；
    IPC主号:
    专利说明:

    DESCRIPTION
    Printing ink
    The invention relates in the first place to a water-based printing ink for printing a design on a PVC substrate, such as, for example, a printing layer of a vinyl floor product.
    If applied to (for example by rotogravure) printing a design on a PVC substrate, such as for example a printing layer of a vinyl floor product produced by a coating technology, said printing ink must provide specific characteristics to take into account specific problems during manufacture from a vinyl floor product. Such a floor product generally comprises at least one backing layer, an impregnating layer, a printing layer (on which the design is printed using the printing ink) and an upper layer. The printing ink should at least be compatible with the printing layer (PVC substrate). Such compatibility is important with regard to a sufficient wetting of the printing layer by the printing ink and a sufficient adhesion of the printing layer to said substrate.
    In accordance with the present invention, the printing ink is characterized in that it contains at least water, a surfactant, a pH regulator, latex, a defoamer, a binder, a plasticizer and a thickener, the latex being primarily a contains water-based PVC latex with a solid content of 30 to 50% in an amount of 40 to 60% by weight of the ink and secondly contains a water-based acrylic resin latex with a solid content of 25 up to 40% in an amount of 7 to 12% by weight of the ink, and wherein the thickener comprises a polyetherurea polyurethane thickener in an amount of 3 to 8% by weight of the ink.
    Due to the presence of the PVC latex, the printing ink obtained has a surface energy γ that is sufficiently lower (for example 0.008 to 0.01 N / m lower) than the surface tension of the PVC substrate, which results in good adhesion and preventing delamination. The presence of the acrylic latex results in the required mechanical properties once the printing ink has been printed and dried (e.g. by hot air). Furthermore, the acrylic latex provides compatibility and adhesion between successive printing layers that are printed on one another (a design for a vinyl floor product is generally separated into different, sequentially applied layers that together provide the final design), thereby preventing delamination. The polyetherurea polyurethane thickener will protect the water-based printing ink against settling and separation because it increases viscosity. The thickening effect thereof is based on a physical interaction. The thickener chosen may be one of the so-called HAZE thickeners.
    In an embodiment of such a water-based printing ink, it holds that the PVC latex has a solids content of 35 to 45%, and preferably 40%. In another embodiment of the water-based printing ink, the acrylic resin latex has a solids content of 30 to 35%.
    The solids content of the PVC latex and the acrylate latex determine the final solids content of the water-based printing ink, which will ultimately be between 25 and 35% by weight.
    In one embodiment of such a water-based printing ink, it holds that the thickener comprises said polyetherurea polyurethane thickener in an amount of 4.5 to 6.5%, and preferably 5 to 6%, by weight of the ink.
    Such a dosage of the thickener will also determine the viscosity of the printing ink after dilution with water just prior to use on a rotor engraving printing press.
    In another embodiment of the water-based printing ink, it holds that the latex contains the said PVC latex in an amount of 45 to 55% by weight of the ink. It is also possible that the latex contains the aforementioned acrylic resin latex in an amount of 8.5 to 10.5% by weight of the ink.
    Preferably, the PVC latex is a water-based dispersion of polyvinyl chloride made by emulsion polymerization. Said PVC latex can have a K value (which characterizes the length of the polymer chain) from 68 to 75, preferably 70 to 75. Ideally, the PVC latex has a K value of 72.
    In another embodiment of the water-based printing ink according to the present invention, it holds that said PVC latex contains particles with a particle size of 0.1 to 0.4 μm and preferably 0.15 to 0.25 μm.
    In yet another embodiment of the water-based printing ink, it holds that said PVC latex has a pH of 7 to 12 and preferably 8 to 10, as a result of which the final printing ink is an anionic system with a tendency to a non ionic system.
    In an embodiment of the water-based printing ink, it holds that said acrylic resin latex has a pH of 7 to 10, and preferably 8 to 9. Furthermore, said acrylic resin latex preferably has a glass transition temperature Tg of 60 to 90 ° C , preferably 65 to 85 ° C and, above all, preferably 70 to 80 ° C. In addition, said acrylate resin latex preferably has a minimum film-forming temperature of 45 to 75 ° C, preferably 50 to 70 ° C, and above all preferably 55 to 65 ° C.
    In another embodiment of the water-based printing ink, the said polyetherurea polyurethane is of the type with a substantially Newtonian flow (and somewhat pseudoplastic). As a result, the final rheology of the ink can be determined favorably.
    In one embodiment of the water-based printing ink according to the present invention, it holds that the surfactant is at least partially of a non-ionic, solvent-free type with a first component with a single hydrophilic group selected from a phosphate ester, a sulfonate ester or an ethoxylate, and a second component with two hydrophilic groups, both independently selected from a phosphate ester, a sulfonate ester or an ethoxylate, and wherein the surfactant contains each of said components in an amount of 0.3 to 0.7% per weight of the ink.
    As noted above, the surface energy γ of the printing ink must be sufficiently lower (e.g., 0.008 to 0.01 N / m lower) than the surface tension of the PVC substrate. The PVC substrate will, depending on the plastisol composition, have a surface tension between 0.037 and 0.04 Newtons per meter and therefore the surface energy must be reduced to a level below 0.03 N / m. This can be accomplished by the surfactant. The molecular structure thereof contains a hydrophilic portion that couples it to the printing ink and a hydrophobic portion that is directed out of the ink. As a result of the use of these two components (with the first component oriented vertically on the liquid surface and the second component oriented horizontally, which leads to efficient use of the liquid surface), the surface energy is sufficiently reduced and wetting is easier.
    Preferably, the hydrophilic group of the first component contains an ethoxylate. Furthermore, it is possible that one of the second hydrophilic groups of the second component is an ethoxylate and the other is a phosphate ester.
    In one embodiment of such a water-based printing ink, it holds that the total amount of said components is 0.7 to 1.3%, preferably 0.85 to 1.05%, by weight of the printing ink.
    In yet another embodiment of the water-based printing ink, it holds that, as a third component, the surfactant further comprises a micro-polysiloxane in an amount of 0.1 to 0.4%, preferably 0.2 to 0, 3%, by weight of the printing ink. Such an amount of micropolysiloxane will increase the efficiency of the other surfactants in the composition without degrading the printing power.
    In one embodiment of the water-based printing ink according to the present invention, it holds that the defoamer comprises a silicone-free first component that is a mixture of low surface tension materials, and a silicone and oil-free second component based on an organic ester, each in an amount of 0.5 to 1.5%, preferably 0.7 to 1.2% by weight of the printing ink, and above all preferably in an amount of 0.9 to 1.1% by weight of the printing ink .
    It is known that a water-based ink composition must be protected against the uptake of air. An uptake of air will cause a deviation of the ink density and will negatively influence the printing behavior of the ink. Therefore, a defoamer must be added to the composition.
    The printing capacity is very important in this context. Therefore, silicone-based defoaming agents are not an option. Considering the entire production cycle of a water-based ink (from basic materials to use), there are two steps where protection against air intake must be built in. The first step is the preparation step. Because of the mixing process, air penetrates into the water-based ink and this air must be forced out of the matrix by adding a defoamer. The selected first defoamer component is therefore a mixture of materials with low surface tension, which will allow the air to pass more easily through the surface and be separated from the water-based ink. During the second step (production), a defoamer is required that has increased stability when it passes through a pump.
    It is known that passing a pump is critical for a defoamer because passing a pump will damage the defoamer at the molecular level and will make the defoamer inactive. The second component therefore contains the said organic ester.
    In a preferred embodiment of such a water-based printing ink, said defoamer comprises each of said two components in an amount of 0.9 to 1.1% by weight of the printing ink.
    In an embodiment of the water-based printing ink according to the present invention, the binder is glycol-free and is a low-VOC ester of a carboxylic acid in an amount of 0.4 to 0.8%, preferably 0.5 to 0 , 7% by weight of the printing ink, and above all preferably in an amount of 0.55 to 0.65% by weight of the printing ink.
    Such a binder improves the flow and film formation during printing by reducing the minimum film forming temperature of the water-based printing ink and improves its scraping resistance after drying. Prior art inks use glycols, but the emissions of VOCs (volatile organic components) are increased as a result.
    In another embodiment of the water-based printing ink according to the present invention, it holds that the plasticizer is a non-phthalate plasticizer containing a phosphate ester in an amount of 0.3 to 0.8%, preferably 0.4 to 0.7 % by weight of the printing ink, and above all preferably in an amount of 0.5 to 0.65% by weight of the printing ink.
    A problem specific to the printing of a vinyl floor product is the fact that the printed design is confined between two PVC layers, namely the PVC substrate and, after printing, the transparent PVC top layer. It is logical that the ink must not only have good compatibility with the PVC substrate, but also with the PVC top layer. If there is insufficient compatibility between the ink and the transparent PVC top layer, there will not be enough adhesion between the two layers and the vinyl floor product will simply delaminate. In order to avoid this problem, a plasticizer with the above characteristics is added to the composition.
    In a preferred embodiment of such a water-based printing ink, the plasticizer is octyl diphenyl phosphate.
    In another embodiment of the water-based printing ink according to the present invention, it holds that the pH controller contains an amino-based material with a pH of 10 to 12, and preferably a pH of 10.5 to 11.5. This is due to the fact that the final water-based ink must have a pH value between 7 and 8.5, ideally between 8 and 8.5.
    The invention further relates to a method for manufacturing a printing ink according to the present invention. According to this method, the components are added in the following order: water, surfactant, pH regulator, latexes, defoamer, binder and plasticizer and finally the thickener.
    The invention also relates to a method for the manufacture of a vinyl floor product by a method for coating at least one backing layer, an impregnating layer, a printing layer and an upper layer, wherein a water-based printing ink according to the present invention is superimposed on the printing layer is printed by a rotogravure method before the top layer is coated on top of the printing layer.
    Finally, the invention relates to a vinyl floor product obtained by such a method for the manufacture of a vinyl floor product according to the present invention.
    In an embodiment of the invention, the vinyl floor product defines a tile or plank-shaped floor product, but other products (such as ceiling and wall products) are also conceivable.
    The invention is not limited to the embodiments described above, which can be varied widely within the scope of the present invention as defined by the appended claims.
    权利要求:
    Claims (28)
    [1]
    A water-based printing ink for printing a design on a PVC substrate, such as, for example, a printing layer of a vinyl floor product, characterized in that it comprises at least water, a surfactant, a pH controller, latex, a defoamer, a binder, a plasticizer and a thickener, the latex primarily comprising a water-based PVC latex with a solids content of 30 to 50% in an amount of 40 to 60% by weight of the ink and secondly, contains a water-based acrylic resin latex with a solids content of 25 to 40% in an amount of 7 to 12% by weight of the ink, and wherein the thickener contains a polyetherurea polyurethane thickener in an amount of 3 to 8 % by weight of the ink.
    [2]
    Water-based printing ink according to claim 1, wherein the PVC latex has a solids content of 35 to 45%, and preferably 40%.
    [3]
    A water-based printing ink according to claim 1 or 2, wherein the acrylate resin latex has a solids content of 30 to 35%.
    [4]
    A water-based printing ink according to claim 1, 2 or 3, wherein the thickener comprises said polyetherurea polyurethane thickener in an amount of 4.5 to 6.5%, and preferably 5 to 6%, by weight of the ink.
    [5]
    A water-based printing ink according to any one of the preceding claims, wherein the latex contains said PVC latex in an amount of 45 to 55% by weight of the ink.
    [6]
    A water-based printing ink according to any one of the preceding claims, wherein the latex contains said acrylic resin latex in an amount of 8.5 to 10.5% by weight of the ink.
    [7]
    A water-based printing ink according to any preceding claim, wherein the PVC latex is a water-based dispersion of polyvinyl chloride made by emulsion polymerization.
    [8]
    A water-based printing ink according to any one of the preceding claims, wherein the PVC latex has a K value of 68 to 75, preferably 70 to 75 and, above all, preferably 72.
    [9]
    Water-based printing ink according to any one of the preceding claims, wherein said PVC latex contains particles with a particle size of 0.1 to 0.4 μ and preferably 0.15 to 0.25 μ.
    [10]
    Water-based printing ink according to any one of the preceding claims, wherein said PVC latex has a pH of 7 to 12 and preferably 8 to 10.
    [11]
    A water-based printing ink according to any one of the preceding claims, wherein said acrylic resin latex has a pH of 7 to 10, and preferably of 8 to 9.
    [12]
    A water-based printing ink according to any one of the preceding claims, wherein said acrylate resin latex has a glass transition temperature Tg of 60 to 90 ° C, preferably 65 to 85 ° C and, above all, preferably 70 to 80 ° C.
    [13]
    A water-based printing ink according to any one of the preceding claims, wherein said acrylate resin latex has a minimum film-forming temperature of 45 to 75 ° C, preferably 50 to 70 ° C and most preferably 55 to 65 ° C.
    [14]
    A water-based printing ink according to any one of the preceding claims, wherein said polyetherurea polyurethane is a thickener type with a substantially Newtonian flow.
    [15]
    A water-based printing ink according to any one of the preceding claims, wherein the surfactant is at least partially of a non-ionic, solvent-free type with a first component having a single hydrophilic group selected from a phosphate ester, a sulfonate ester or an ethoxylate , and a second component with two hydrophilic groups, both of which are independently selected from a phosphate ester, a sulfonate ester or an ethoxylate, and wherein the surfactant contains each of said components in an amount of 0.3 to 0.7% by weight of the ink.
    [16]
    The water-based printing ink of claim 15, wherein the hydrophilic group of the first component contains an ethoxylate.
    [17]
    The water-based printing ink according to claim 15 or 16, wherein one of the two hydrophilic groups of the second component is an ethoxylate and the other is a phosphate ester.
    [18]
    A water-based printing ink according to claim 15, 16 or 17, wherein the total amount of said components is 0.7 to 1.3%, preferably 0.85 to 1.05%, by weight of the printing ink.
    [19]
    The water-based printing ink according to any of claims 15 to 18, wherein the surfactant further comprises, as a third component, a micro-polysiloxane in an amount of 0.1 to 0.4%, preferably 0.2 to 0.3%, by weight of the printing ink.
    [20]
    A water-based printing ink according to any one of the preceding claims, wherein the defoamer comprises a silicone-free first component that is a mixture of low surface tension materials, and a silicone and oil-free second component based on an organic ester, each in a amount of 0.5 to 1.5%, preferably 0.7 to 1.2% by weight of the printing ink, and above all preferably in an amount of 0.9 to 1.1% by weight of the printing ink.
    [21]
    Water-based printing ink according to any one of the preceding claims, wherein the binder is glycol-free and a low-VOC ester of a carboxylic acid in an amount of 0.4 to 0.8%, preferably 0.5 to 0.7 % by weight of the printing ink, and above all preferably in an amount of 0.55 to 0.65% by weight of the printing ink.
    [22]
    Water-based printing ink according to any one of the preceding claims, wherein the plasticizer is a non-phthalate plasticizer containing a phosphate ester in an amount of 0.3 to 0.8%, preferably 0.4 to 0.7% by weight of the printing ink, and above all preferably in an amount of 0.5 to 0.65% by weight of the printing ink.
    [23]
    The water-based printing ink of claim 25, wherein the plasticizer is an octyl diphenyl phosphate.
    [24]
    A water-based printing ink according to any one of the preceding claims, wherein the pH controller contains an amino-based material with a pH of 10 to 12, and preferably a pH of 10.5 to 11.5.
    [25]
    A method for producing a printing ink according to any one of the preceding claims, wherein the components are added in the following order: water, surfactant, pH regulator, latexes, defoamer, binder and plasticizer and finally the thickener.
    [26]
    A method of manufacturing a vinyl floor product by means of a method of coating at least one backing layer, an impregnating layer, a printing layer and an upper layer, wherein a water-based printing ink according to any of claims 1 to 24 is printed on top of the printing layer by a rotogravure method before the top layer is coated on top of the printing layer.
    [27]
    A vinyl floor product obtained by a method according to claim 26.
    [28]
    A vinyl floor product according to claim 27 that defines a tile or plank floor product.
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    同族专利:
    公开号 | 公开日
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3068118A|1962-01-12|1962-12-11|Congoleum Nairn Inc|Decorative surface covering|
    US4111878A|1976-08-05|1978-09-05|Gaf Corporation|Water based ink composition for vinyl flooring|
    US4148944A|1976-08-05|1979-04-10|Gaf Corporation|Method for printing vinyl flooring with water based ink composition|
    WO1990003412A1|1988-09-27|1990-04-05|Datacard Corporation|Water-based lamination ink|
    法律状态:
    2021-05-26| MM| Lapsed because of non-payment of the annual fee|Effective date: 20200831 |
    优先权:
    申请号 | 申请日 | 专利标题
    EP11173641|2011-07-12|
    EP11173641|2011-07-12|
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