• 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:
    An adhesive containing an aqueous polyurethane composition having a solids content between 65.5 and 95%.
    公开号:AT510651A1
    申请号:T17932010
    申请日:2010-10-29
    公开日:2012-05-15
    发明作者:
    申请人:Mikowitsch Herbert；
    IPC主号:
    专利说明:

    -1 -
    The invention relates to an adhesive containing an aqueous polyurethane composition.
    Furthermore, the invention relates to a method for producing a wooden component constructed from at least two elements by hot-pressing the elements together.
    For the production of wood laminates or molded parts of the type mentioned above adhesives based on urea or melamine-formaldehyde resins are currently used in one or two-component form, which split off formaldehyde. The formaldehyde cleavage is particularly at the presses in the furniture factories for workers hazardous regardless of the later exposure to formaldehyde in the living room.
    There are also aqueous non-formaldehyde-releasing polyurethane or PU / copolymer adhesives on the market. Such an adhesive with an aqueous polyurethane composition has become known, for example, from WO0200 / 097318. The conventional adhesives based on an aqueous polyurethane composition, however, are problematic in processing, since these adhesives can cause a strong vapor bubble formation when pressing large-sized pieces of furniture. In addition, there are still problems with pickling and varnishing when using these adhesives. Often, the layers dissolved again as soon as the stain stopped longer in the Bohlö-chern.
    It is therefore an object of the invention to provide an adhesive for the production of wood-laminate moldings or wood laminates, etc., which has a formaldehyde content below the values split off from natural wood and, moreover, vapor bubble formation in the manufacture of wood laminates and wood laminate moldings, as well as having high water and pickling resistance and good recoatability properties.
    -2-
    This object is achieved with an adhesive of the type mentioned in the present invention, that he has a he proportion of solids between 65.5 and 95%.
    The solution of the invention differs from the known adhesives by a higher solids. The terms solids and solids are used synonymously in this document. The solids of the adhesive can be formed, for example, by binders, fillers, pigments and auxiliaries. The solid has a significant influence on the formation of vapor bubbles in the moldings. Due to the solids content of the invention, relatively high pressing temperatures can be used to achieve short pressing times without the formation of vapor bubbles, but short pressing times are required for rapid economic production. In contrast to the known adhesives, the solids in the system according to the invention is over 65%. It should be noted that the percentages in this document refer to the mass fraction. Another advantage of the solution according to the invention is that only a small change in the shape and dimensions of the deformed furniture parts occurs when the press is opened.
    According to an advantageous variant of the invention, which is characterized by a particularly good water and pickling resistance, it can be provided that the polyurethane composition is a mixture of at least one polyurethane and at least one Vinylacetatethylencopolymer or a mixture of at least one polyurethane and at least one acrylate or a Mixture of at least one polyurethane and at least one acrylate copolymer or a mixture of at least one polyurethane and at least one polyurethane copolymer.
    According to an advantageous variant of the invention, it is provided that the adhesive has a binder content of 50-80%. By means of this embodiment of the invention, a high solids content can be ensured in a simple manner, with only little or no addition of fillers being required. Thus, the production of the adhesive according to the invention can be substantially simplified in this way. Conveniently, the adhesive may have a filler content of 0-50%. By adding fillers, the solids of the adhesive can be substantially increased and, if necessary, adapted to given requirements in a simple manner.
    Furthermore, the adhesive of the invention may have a solvent content of 0-5%. • * · · · · · · ι
    • · · I -3-
    In addition, it has been found to be particularly advantageous with regard to the use of the adhesive for joining wood veneers, when the adhesive has a pH of 6-9.
    In order to achieve good processability, it is optionally possible for at least one thickener, for example Rheocoate 35, to be added to the adhesive in a proportion of 0-3%.
    Furthermore, the adhesive can have a defoamer content of 0-5%.
    The abovementioned object can also be achieved by a method of the type mentioned at the outset in that an adhesive according to the invention is applied between the elements to be mated with each other before they are used.
    The inventive method is particularly suitable for the production of window frames, although the method is not limited to such an application alone So can also any other wood components, in the production of a hot pressing is used to be prepared by the method according to the invention.
    Thus, the wood component may be a layered wood laminate or molded wood veneer, wherein the adhesive is applied in an amount of 80-200g / m 2 to a surface of another layer, facing surface of a layer, and the layers at a temperature of between 50 and 200 ° C. over a period of 5 to 30 minutes, preferably at a pressure of between 90 and 150 bar.
    The high solids content in the adhesive according to the invention is responsible for the fact that during the pressing little steam is formed and therefore also large-scale moldings can be prepared by the method according to the invention and the risk of a water vapor bubble between the layers can be significantly reduced.
    The invention together with further advantages will be explained in more detail below with reference to some non-limiting embodiments. All statements on ranges of values in the description of the present invention should be understood to include any and all sub-ranges thereof, e.g. the indication 1 to 10 is to be understood as meaning that all subregions, starting from the lower one
    • · · · · »·
    -4-
    Limit 1 and the upper limit 10 are included, i. all subregions begin with a lower limit of 1 or greater and end at an upper limit of 10 or less, e.g. 1 to 1.7, or 3.2 to 8.1 or 5.5 to 10.
    The adhesive according to the invention has a solids content of more than 65%. This makes it possible to achieve a very good behavior with regard to the processing of wood veneers and laminated press forms. As particularly favorable, a solids content of more than 70%, in particular of 71-95%, has been found.
    A recipe for the preparation of an adhesive according to the invention is as follows:
    Product name Proportion in% Manufacturer NeoRez R 9249 40.0% DSM NeoResins + Vinnapas 7200 20.0% Wacker Rheocoate 35 1.0% Dow DA 35 0.2% Dow Chemicals Omyacarb 5 38.8% Omya
    However, other recipes can be used instead of the above recipe. Thus, the underlying emulsions or dispersions can be replaced by other suitable. For example, instead of NeoRez R-9249, other polyurethane dispersions such as NeoRez R-2005, NeoRez R 989 and instead of Vinnapas 7200 other vinyl acetate ethylene copolymer dispersions or acrylate or acrylic copolymer dispersions may be used. Such suitable dispersions are known to the skilled person in large numbers, When using other dispersions, the mixing ratios may of course change and deviate from the mixing ratios of the recipe given above. Also, instead of calcium carbonate in the form of omyacarb 5, other fillers such as rock flour, silicates, quartz flours, etc. may be added. Depending on the amount of binder used can be completely dispensed with fillers, the same applies to the use of aids such as thickeners and defoamers. Essential to the invention is only that the solids of the adhesive makes up over 65%. -5-
    The adhesive according to the invention is particularly well suited for use in the manufacture of a wood laminate or molded part of wood fuming composed of at least two layers. In this case, the adhesive according to the invention can be applied in an amount of 80-200 g / m 2 to a surface of at least one layer and then pressed together with at least one other layer at a temperature between 50 and 200 ° C. over a period of 5 to 30 minutes be glued. This can happen, for example, at a pressure of 90-150 bar.
    In principle, any number of layers can be glued together and pressed together in the method according to the invention.
    The embodiments describe possible embodiments of the adhesive according to the invention or the method according to the invention, it being noted at this point that various combinations of the individual embodiments are possible with each other and this possibility of variation due to the doctrine of technical action by representational invention in the knowledge of the technical field professional. So are all conceivable embodiments, which are possible by combinations of individual details of the illustrated and described embodiment variant, includes the scope of protection.
    权利要求:
    Claims (10)
    [1]


    4 * 9 «Μ ·

    1. An adhesive containing an aqueous polyurethane composition, characterized in that it has a solids content of between 65.5 and 95%.
    [2]
    2. An adhesive according to claim 1, characterized in that the polyurethane composition is a mixture of at least one polyurethane and at least one vinyl acetate ethylene copolymer or a mixture of at least one polyurethane and at least one acrylate or a mixture of at least one polyurethane and at least one acrylate copolymer or a mixture of at least a polyurethane and at least one polyurethane copolymer.
    [3]
    3. An adhesive according to claim t or 2, characterized in that it has a binder content of 50 - 80%.
    [4]
    4. Adhesive according to one of claims 1 to 3, characterized in that it has a filler content of 0 - 50%.
    [5]
    5. Adhesive according to one of claims 1 to 4, characterized in that it has a solvent content of 0 - 5%.
    [6]
    6. Adhesive according to one of claims 1 to 5, characterized in that it has a pH of 6-9.
    [7]
    7. Adhesive according to one of claims 1 to 6, characterized in that it has a thickener content of 0 - 3%.
    [8]
    8. Adhesive according to one of claims 1 to 7, characterized in that it has a defoamer content of 0-5%. «» ·· 4 «« · -2-
    [9]
    9. A method for producing a constructed of at least two elements wood component, in particular a window frame, by hot pressing the elements together, characterized in that between the elements to be pressed together before their Verprassen an adhesive according to one of claims 1 to 8 is applied.
    [10]
    10. The method according to claim 9, characterized in that it is the wood component is a built-up of layers of wood laminate or molding of wood veneers, wherein the adhesive in an amount of 80 - 200g / m2 on a surface of another layer, facing surface of a Layer is applied and the layers at a lying between 50 - 200 ° C temperature over a period of 5 to 30 minutes, preferably at a lying between 90 and 150 bar pressing pressure, are squashed together. Mikowitsch Herbert

    Lawyers B & Partner Attorney at Law -: 1 • · '«(new) Claims 1. An adhesive containing an aqueous polyurethane composition for hot pressing a wooden component constructed of at least two elements, wherein the adhesive has a solids content between 65.5 and 95%, characterized in that a Binder content of 50 - has 80%. 2. An adhesive according to claim 1, characterized in that the polyurethane composition is a mixture of at least one polyurethane and at least one vinyl acetate ethylene copolymer or a mixture of at least one polyurethane and at least one acrylate or a mixture of at least one polyurethane and at least one acrylate copolymer or a mixture of at least one Polyurethane and at least one polyurethane copolymer. 3. An adhesive according to claim 1 or 2, characterized in that it comprises an adhesive according to one of claims 1 to 3, characterized in that it has a filler content of 0 - 50%. 4. Adhesive according to one of claims 1 to 3, characterized in that it has a solvent content of 0 - 5%. 5. Adhesive according to one of claims 1 to 4, characterized in that it has a pH of 6-9. 6. Adhesive according to one of claims 1 to 5, characterized in that it has a thickener content of 0 - 3%. 7. Adhesive according to one of claims 1 to 6, characterized in that it has a defoamer content of 0 - 5%. I k I Λ T______ • · · · · · · · 2 » 8. A method for producing a wooden component constructed from at least two elements, in particular a window frame, by hot pressing of the elements together, characterized in that between the elements to be pressed together before their pressing an adhesive according to one of claims 1 to 7 is applied. 9. The method according to claim 8, characterized in that it is the wood component is a built-up of layers of wood laminate or molded part of wood fuming, wherein the adhesive in an amount of 80 - 200g / m2 on one surface of another layer, facing Surface of a layer is applied and the layers are pressed together at a lying between 50 - 200 ° C temperature over a period of 5 to 30 minutes, preferably at a lying between 90 and 150 bar pressing pressure with each other. Mikowitsch Herbert

    Lawyers Büifg & F & Partner Rechtsanwält GmbH POSSIBLE
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    引用文献:
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    US5652288A|1994-06-06|1997-07-29|Wood; Benny R.|Water dispersible polyisocyanate adhesive|
    EP0829525A1|1996-09-16|1998-03-18|H.B. Fuller Licensing & Financing, Inc.|Two-component water-based adhesives having extended pot stability|
    WO2005007762A1|2003-07-11|2005-01-27|Construction Research & Technology Gmbh|Polyurethane-polymer hybrid dispersion with enhanced surface properties, method for the production and utilization thereof|
    EP1518911A1|2003-09-19|2005-03-30|Basf Aktiengesellschaft|Single component self-adhesive sealing composition|
    WO2007062720A1|2005-11-30|2007-06-07|Fischerwerke Gmbh & Co. Kg|Adhesive stick comprising polyurethane/polyacrylate hybrid dispersion|
    WO2007082826A2|2006-01-19|2007-07-26|Basf Se|Polyurethane adhesive comprising silane groups and carbodiimide groups|
    WO2009149036A1|2008-06-03|2009-12-10|Dow Global Technologies Inc.|Pressure sensitive adhesive compositions and method of making the same|
    CA991973A|1973-03-27|1976-06-29|Sumitomo Bakelite Company|Method for bonding wet woods|
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    CN112895028A|2021-01-23|2021-06-04|浙江创通木业有限公司|Formaldehyde-free artificial wood board and preparation method thereof|
    法律状态:
    2017-06-15| MM01| Lapse because of not paying annual fees|Effective date: 20161029 |
    优先权:
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