DE102009000335A1 - Method for reducing emissions (aldehyde reduction) of wood and wood-based materials by using glue containing preservatives and / or antioxidants - Google Patents

Abstract

The invention relates to a process for the production of wood-containing intermediates for further processing into wood-based materials, in particular OSB, and solid wood products, comprising the steps: a) use of wood-containing starting materials; b) wetting the wood-containing starting materials with a solution containing at least one adhesive and at least one antioxidant or at least one preservative.

Description

The This invention relates generally to the field of wood-based materials production and solid wood products. In particular, the invention relates to a Process for the preparation of wood-containing intermediates for further processing to wooden materials and solid wood products. The invention also relates to novel wood-containing intermediates and wood derived therefrom and solid wood products.

Wood materials and solid wood products are widely used today and are found in many everyday products, such as B. in the manufacture of furniture, buildings or parts of buildings, or toys, just a few To mention uses. The products are made of wood-based materials and solid wood naturally mostly and above long time in the immediate vicinity of and around Humans and animals, z. B. in the case of wood furniture, construction wood, Wall, floor and ceiling cladding is preferred especially in closed Rooms.

A particularly important requirement of wood-based materials and solid wood products or products containing them is therefore sufficient Compatibility, health hazards or impairments excluded. This is where emissions from such pollutants a major role, the z. B. Impact on the health of humans and animals or can be perceptible by smell and thus as annoying be felt.

To the Consumer protection and in the production and distribution of such Products of persons involved have already been adopted by the legislator some emission limits are determined by law and it is too expect the scope of such arrangements to increase and the limits of existing regulations tend to go even further be lowered. An example of how such limits implemented and their compliance is measured is the rating of construction products, including wood-based materials and solid wood products can fall. The valuation of construction products is based on the scheme of the Committee for the Health Assessment of Construction Products (AgBB). For health evaluation, the product goes through a series of tests. For a variety of interior relevant VOC (VOC = volatile organic compounds, volatile organic compounds) Links; SVOC = semivolatile organic compounds) are health-related auxiliary quantities NIK values (lowest concentrations of interest) listed. These NIK values are for aldehydes and in particular unsaturated aldehydes relatively small, d. H. already small Emissions can lead to a rejection of the construction product. Therefore, a reduction of the emission of pollutants is out Wood products, especially the aldehyde emission, important.

A Class of materials, their emission from wood-based materials and solid wood products already known, represent the saturated and unsaturated Aldehydes. Aldehydes are volatile organic compounds, which are noticeable by smell and especially in larger ones Concentrations may be harmful to health. This especially applies to unsaturated aldehydes to.

These Aldehydes are formed mainly by oxidation of fats contained in the wood-containing raw materials. These oxidation reactions are also affected by the necessary manufacturing conditions for wood materials and solid wood products, such. B. crushing of the wood to the desired wood-containing starting materials, Drying and pressing at low and high temperatures wood-containing starting materials favors. It is so a need for a process which reduces the emission of pollutants, such as B. of aldehydes, wood-based materials and solid wood products or their intermediates diminished.

In WO 06/032267 For example, a method is described for treating wood or wood particles immediately after making the strands and before drying the strands, with the aim of reducing release of unsaturated aldehydes. The use of the solutions described there actually led to a reduction of the aldehyde emission, however, a residual emission is still detectable.

task the invention is to provide improved methods and means which allow the emission of pollutants, such. B. of aldehydes and / or terpenes, wood materials and solid wood products or to further reduce their intermediates.

• a) Einsatz von holzhaltigen Ausgangsstoffen,
• b) Benetzen der holzhaltigen Ausgangsstoffe mit einer Lösung enthaltend mindestens einen Klebstoff und mindestens ein Antioxidanz oder mindestens einen Konservierungsstoff.

This object is achieved by providing a method for producing wood-containing intermediates for further processing into wood-based materials, in particular OSB or solid wood products, comprising the steps:

• a) use of wood-containing starting materials,
• b) wetting the wood-containing starting materials with a solution containing at least one adhesive and at least one antioxidant or at least one preservative.

The individual inventive agents and process steps will be described in more detail below.

Wood materials:

Wood materials in the sense of the present invention, wooden layers become different Made up of starch, these wood layers are wood particles contain. Such wood particles can be wood strips, wood chips or wood fibers of the same or different woods, one certain size or different size be.

Usually become plate or strand-shaped wood materials through Mixture of different types of wood particles with natural ones and synthetic binders and optionally adding further additives for example, water repellents in the course of a subsequent Hot compression produced.

Selected forms of wood-based materials are:

Plywood: As plywood or plywood wood plates are called, the several superimposed veneer or board layers consist. The layers are each glued 90 ° to each other or glued can be parallel. The fibers of the visible run Surfaces parallel on both sides. The number of Veneer layers is therefore mostly odd. In some areas will for some time but also glued parallel. This one does, when regrinding (eg for stairs) not in a transversely veneered Surface to come. Only today's quality of Glue allows for such a construction.

Composite panels: In this case, these are multilayer materials. Most of time High-strength cover layers are combined with light middle layers, resulting in a weight saving.

• – Grobspanplatten, auch OSB-Platten (für englisch: oriented strand (bzw. structural) board – Platte aus ausgerichteten Spänen, OSB) sind Mehrschichtplatten, die aus langen, schlanken Spänen (strands) hergestellt werden. Bevorzugt weisen diese Späne eine mittlere Länge von 2 bis 20 cm auf. Die Herstellung der OSB-Platten erfolgt gewöhnlich in Verfahren, die folgende Schritte umfassen:
• • Spanaufbereitung: Aus dem entrindeten Rundholz werden in Längsrichtung durch rotierende Messer die Strands oder Späne herausgeschnitten.
• • Trocknung: Die natürliche Feuchtigkeit der Späne wird bei hohen Temperaturen reduziert. Dies ist notwendig, um die Späne danach mit ausreichend Klebstoff benetzen zu können. Außerdem darf während des Pressvorgangs nicht zuviel Feuchtigkeit in den Spänen vorhanden sein, da sonst der entstehende Dampfdruck die Rohplatte zum Platzen bringen könnte (Trocknungstemperatur bis zu 500°C).
• • Beleimung: Der Klebstoff wird fein verteilt auf die Späne aufgebracht.
• • Streuung: Die etwa 20–200 mm langen, 10–50 mm breiten und 0,6–1,5 mm dicken Späne werden im Wurfverfahren längs und quer orientiert so gestreut, dass sie kreuzweise in üblicherweise drei Schichten angeordnet werden.
• • Pressung: Unter hohem Druck und Temperatur (Pressentemperatur bis zu 250°C) werden die Strands größtenteils auf kontinuierlichen Pressen hergestellt.
• • Ggf. anschließend erneute Trocknung der gepressten Platten.

Wood-chip materials, such as chipboard, chipboard and fiberboard:

• - Chipboard, also known as OSB (Oriented Strand (or Structural) Board) are multilayer boards made from long, slender strands. These chips preferably have an average length of 2 to 20 cm. The preparation of the OSB boards is usually done in processes comprising the following steps:
• • Chip preparation: The strands or shavings are cut lengthwise from the debarked roundwood by rotating knives.
• • Drying: The natural moisture of the chips is reduced at high temperatures. This is necessary to be able to then wet the chips with sufficient adhesive. In addition, there must not be too much moisture in the chips during the pressing process, otherwise the resulting vapor pressure could cause the raw plate to burst (drying temperature up to 500 ° C).
• • Gluing: The adhesive is applied finely distributed to the chips.
• • Scattering: The approximately 20-200 mm long, 10-50 mm wide and 0.6-1.5 mm thick chips are longitudinally and transversely oriented scattered in the throwing process so that they are arranged crosswise in usually three layers.
• • Pressing: Under high pressure and temperature (press temperature up to 250 ° C), the strands are mostly made on continuous presses.
• • Possibly. then re-drying the pressed plates.

• – Faserplatten, beispielsweise MDF (Mitteldichte Faserplatte): Aus feinstzerfasertem, hauptsächlich rindenfreiem Nadelholz und durch eine schonende Verpressung wird ein in Längs- und Querrichtung gleichermaßen homogener Holzwerkstoff hergestellt.
• • Aufbereitung: Als Rohstoff für die Holzfaserherstellung werden überwiegend Rundholz (Stammholz), Hackschnitzel, Schwarten und in geringerem Maße Altholz, Restrollen der Schälfurnierherstellung, Furnierreste und Sägespäne verwendet.
• • Hackschnitzelerzeugung: Rundholz wird in den meisten Fällen entrindet und in Scheibenhackern oder wie auch die Schwarten oder Altholz in Trommelhackern zu Hackschnitzeln zerkleinert. Die Hackschnitzel werden vor der Weiterverarbeitung zunächst sortiert (gesiebt) und zumeist trocken oder nass von Sand und Steinen gereinigt.
• • Zerfaserung: Anschließend gelangen die Hackschnitzel zur hydrochemischen Vorbehandlung in einen Vordämpfbehälter, danach in den Kocher und danach in den Refiner (Zerfaserer). Der zerfaserte Stoff wird aus dem Refiner über ein regelbares „Glasventil” durch die „Glasleitung” herausgeblasen. Im Refiner befinden sich ebenfalls sechs bis zehn bar Dampfdruck. Der Dampf bildet das Transportmittel für die Fasern auf ihrem Weg durch die Glasleitung in den Trockner.
• • Trocknung: Nach der Zerfaserung wird der Faserstoff – im Gegensatz zu Spänen – mit (zumeist direkt mit Rauchgasen oder Brennern beheizten) Stromtrocknern getrocknet. Der Faserstoff wird in den heißen Abgasstrom gegeben und bei der pneumatischen Förderung im Trocknungskanal getrocknet. Am Ende wird der Faserstoff mit etwa 5–10% Holzfeuchte in Zyklonen vom Luftstrom abgeschieden.
• • Beleimung: Zumeist werden Harnstoff-Formaldehyd-Harze (Harnstoffharz, Urea-Formaldehyde => UF) zur Beleimung eingesetzt. Diese Harze können mit Melamin oder Phenol verstärkt sein, um die Feuchtebeständigkeit der Leimverbindung zu verbessern. Nur in seltenen Fällen werden Isocyanate (Polymeres Diphenylmethandiisocyanat – PMDI) als Leimsystem eingesetzt. In neueren UF-Leimsystemen wird der molare Anteil an Formaldehyd gegenüber dem Harnstoff immer weiter reduziert, um die gesetzlichen Vorgaben bezüglich der Formaldehydemissionen von Holzwerkstoffen (Klasse E1, E2 in Europa bzw. F**** in Japan) besser einhalten zu können. Es werden drei Verfahren der Beleimung unterschieden: Mischerbeleimung, Blow-Line-Beleimung, Trockenbeleimung.
• • Fasersichtung: In den meisten heutigen MDF-Anlagen werden die Fasern nach dem Trocknungsprozess (oder – wenn vorhanden – erst nach der Nachbeleimung) in einem Fasersichter nachgereinigt. Die Fasern werden in einen Luftstrom gegeben und entweder über Wirbelbildung, scharfe Umlenkungen, Prallsichtung, Steigluftsichtung oder einer Kombination mehrerer Effekte von Schwerteilen (Leimklumpen, Gummi, Metall) weitestgehend befreit. Anschließend werden die Fasern erneut über Zyklonabscheider vom Luftstrom getrennt und der Formstation zugeführt.
• • Formung und Verpressung: Streuung: Die Streustation besteht aus einem Dosierbunker, einer Mattenstreuung und einer Mattenglättung. Formstraße: Nach der Streustation wird die Fasermatte gewogen und die Faserfeuchte gemessen. Der Formling gelangt anschließend in die Vorpresse. Hier wird der Formling bei der kalten Vorverdichtung in der Dicke reduziert, damit die Heißpressen effizienter beschickt werden können und die Gefahr der Beschädigung der Formlinge reduziert wird. Bei der Vorverdichtung im Durchlauf wird zumeist mit Bandvorpressen, nach dem Prinzip des Förderbandes (seltener mit Plattenbandvorpressen, nach dem Prinzip der Panzerkette, oder mit Walzenbandvorpressen, nach dem Prinzip des Pyramidensteintransport mit Rundhölzern) gearbeitet. Nach der Vorpresse folgt die Mattenbesäumung, bei welcher Seitenstreifen von der Fasermatte abgetrennt werden, so dass die entsprechend gewünschte Plattenbreite produziert werden kann. Weitere Messgeräte zur Dichtekontrolle oder Metallerkennung können folgen. Auch eine Mattenbesprühung zur Verbesserung der Oberflächenqualitäten oder Beschleunigung der Mattendurchwärmung kann folgen. Heißpresse: Es folgt die Heißpressung, wo getaktet oder kontinuierlich gearbeitet wird. Faserplatten werden auf Kalanderpressen hergestellt. Die Verpressung erfolgt hier mit Presswalzen und einem Außenband auf einer beheizten Kalanderwalze.

• – Spanplatten werden aus Kostengründen hauptsächlich aus Holzresten und Durchforstungsholz hergestellt. Dabei kommen unterschiedliche Holzpartikel zum Einsatz, die sich sowohl in der Holzart, als auch in der Partikelgröße unterscheiden können. Das eigentliche Herstellverfahren umfasst die Schritte: Zerkleinern (Zerspanung) des Holzes zu gewünschten Holzpartikeln; Trocknung der Holzpartikel; Beleimung; Verpressung; ggf. ein anschließender Trocknungsschritt der Spanplatte. Weiterhin werden Klebstoffe (Holzleime und Zementmilch) zur Verbindung der Späne und diverse Netz- und Trennmittel für den Pressvorgang eingesetzt.

For bonding, preference is given to PF adhesives (phenoplast), MUPF adhesives (melamine-urea-phenol-formaldehyde), urea-formaldehyde adhesive, UF adhesive for short, melamine-containing urea adhesives, MUF adhesives for short and PMDI adhesives (Polymeres Diphenylmethandiisocyanat) used, wherein predominantly for qualitative reasons, the proportion of PMDI outweighs. Very often in the middle layer PMDI is used and in the outer layers MUF or MUPF adhesives.

• - Fiberboard, for example MDF (medium-density fiberboard): From feinstzerfasertem, mainly bark-free softwood and a gentle compression a longitudinally and transversely equally homogeneous wood material is produced.
• • Processing: As a raw material for the production of wood fiber, mainly round wood (logs), wood chips, rinds and, to a lesser extent, waste wood, remaining rolls of peeled veneer production, veneer residues and sawdust are used.
• • Wood chips production: Roundwood is debarked in most cases and in disc cutters or how also the rinds or old wood shredded into chips in wood choppers. The chips are sorted before further processing (sieved) and usually dry or wet cleaned of sand and stones.
• • Defibration: The woodchips then enter the hydrochemical pretreatment in a predampening tank, then in the digester and then in the refiner (shredder). The shredded material is blown out of the refiner via a controllable "glass valve" through the "glass line". The refiner also has six to ten bar steam pressure. The vapor forms the transport of the fibers on their way through the glass line into the dryer.
• • Drying: After defibering, the pulp - unlike chips - is dried with electric dryers (mostly heated directly with flue gases or burners). The pulp is placed in the hot exhaust stream and dried in the drying channel during pneumatic conveying. At the end of the pulp is deposited with about 5-10% wood moisture in cyclones from the air flow.
• • Glueing: In most cases, urea-formaldehyde resins (urea resin, urea-formaldehyde => UF) are used for gluing. These resins may be reinforced with melamine or phenol to improve the moisture resistance of the size compound. Only in rare cases are isocyanates (polymeric diphenylmethane diisocyanate - PMDI) used as a sizing system. In newer UF gluing systems, the molar proportion of formaldehyde compared with urea is being reduced further and further in order to be able to better comply with the legal requirements with regard to the formaldehyde emissions of wood-based materials (class E1, E2 in Europe and F **** in Japan). Three types of gluing are distinguished: mixer gluing, blow-line gluing, dry gluing.
• • Fiber direction: In most of today's MDF plants, the fibers are cleaned after the drying process (or, if available, only after re-gluing) in a fiber separator. The fibers are placed in a stream of air and freed as far as possible either by vortex formation, sharp deflections, impact vision, Steigluftsichtung or a combination of several effects of heavy particles (glue lump, rubber, metal). Subsequently, the fibers are again separated by cyclone from the air flow and fed to the forming station.
• • Forming and pressing: Scattering: The scattering station consists of a dosing bunker, a mat diffusion and a mat smoothing. Forming line: After the scattering station, the fiber mat is weighed and the fiber moisture is measured. The molding then passes into the pre-press. Here, the molding is reduced in the cold pre-compaction in thickness, so that the hot presses can be fed more efficiently and the risk of damage to the moldings is reduced. In the pre-compaction in the run is usually worked with tape pre-pressing, according to the principle of the conveyor belt (rarely with Plattenbandvorpressen, according to the principle of the tank chain, or with Walzenbandvorpressen, according to the principle of pyramid stone transport with round timbers). After the pre-press follows the Mats trimming, in which side strips are separated from the fiber mat, so that the corresponding desired plate width can be produced. Other measuring devices for density control or metal detection may follow. Also a Mattenbesprühung to improve the surface qualities or acceleration of the Mattwartwärmung can follow. Hot Press: This is followed by the hot pressing, where clocked or continuously worked. Fiberboard is made on calender presses. The compression takes place here with press rolls and an outer band on a heated calender roll.

• - Chipboard are mainly made of wood residues and thinnings for cost reasons. Different wood particles are used, which can differ in the type of wood as well as in the particle size. The actual production process comprises the steps: comminution (cutting) of the wood to desired wood particles; Drying of the wood particles; gluing; pressing; optionally a subsequent drying step of the chipboard. Furthermore, adhesives (wood glues and cement milk) are used to connect the chips and various wetting and separating agents for the pressing process.

Thermo Wood: Thermowood is the end product of a thermal treatment of wood. This method works physically by heating the Wood. The aim of the treatment is the technical characteristics of the building material to modify wood and so its suitability for to improve certain uses. Differentiation to other procedures: In these thermal wood treatments are temperatures of Degree 170 ° C to 250 ° C used. The thermal Timber treatment may be short term or over 24-48 Hours, sometimes with the exclusion of oxygen or in steam atmosphere. Thermowood is delineated by one Damping or smoking.

Solid wood products:

For the purposes of the present invention, solid wood products are wood products which consist essentially of solid wood parts. Solid wood refers to wood-containing starting materials whose cross-sections have been worked out of a tree trunk and possibly further processed by machining, without any changes being made to the structure of the wood.

Wood-containing starting materials:

Of the Term wood-containing starting materials in the context of the present invention includes all wood-containing substances that are used as starting material for the production of wood materials or solid wood products are used can. Preferred wood-containing starting materials are wood particles or wooden parts, such as those used in the production of chipboard, OSB boards or other wood-based materials (fiber, carpenter-Funierplatten) use find and solid wood parts, as used in the manufacture of solid wood products incl. glued wood are used.

Adhesive:

adhesives which can be used according to the invention, include all those skilled in the manufacture of wood-based materials or solid wood products in question adhesives and adhesive mixtures, such as As waxes, resins, glues, cement, PF adhesives (phenoplast), MUPF adhesives (melamine-urea-phenol-formaldehyde), UF adhesive (Urea-formaldehyde adhesive), MUF adhesives (melamine-containing Urea-formaldehyde adhesives) and PMDI adhesives (Polymeres Diisocyanate).

Especially may preferably be adhesives and / or adhesive mixtures following adhesive classes are used:

Phenolic resins (PF)

The Phenol-formaldehyde resins (PF) represent a significant group in the area wood binder. PF resins are mainly used used in water and weather resistant gluing. Advantageous in the use of PF glues are on the one hand, the low until largely missing formaldehyde donation and on the other hand, the low Thickness swelling. However, PF resins harden in comparison Slower to aminoplastic resins. The produced wood materials have a darker color caused by a dark glue joint, which can be seen in the use of very light veneer. The phenol can be used in both alkaline and acidic Condense area with formaldehyde and crosslink. One differentiates while the alkaline-curing phenols as Resole and the acid curing as novolacs. In the wood-based material industry Only the alkaline curing phenols are used. Phenol resin glues are aqueous, alkaline solutions, consisting of oligomeric to polymeric chains. By the alkaline pH can cause problems when coating these wood-based materials occur, as well as in the use of different types of acidic wood.

PMDI binder based of isocyanates

Unlike UF and PF resins, isocyanates do not belong to the condensation resins but are based on polymethylene diisocyanate (PMDI) and are mainly used for the production of wood-based materials for use in the humid area and for "formaldehyde-free" glued boards. PMDI is particularly suitable as a binder in hard-to-glue annual plants such. Straw and bagasse. PMDI has a very high adhesive behavior, but this makes the processing enormously more difficult, as it does not only react with the wood surface. When using isocyanates as binders, various basic reactions can take place. These include the reaction with water, with the hydroxyl groups of cellulose and hemicellulose and other carbohydrates, with hydroxyl groups of lignin and tannins and with the COOH groups of polygalacturonic acids, uronic acids and lignins. Table 1 lists in detail the advantages and disadvantages of PMDI. Table 1: Advantages and disadvantages of PMDI compared to other binders, in particular UF resins advantages • high storage stability • formaldehyde-free gluing • high reactivity • high bond strength • high moisture tolerance of the bond • low adhesive consumption disadvantage • high price • Use mostly only in the middle layer, when used in the top layer special release agents are required • Use of emulsifiers (EMDI) or special dosing and gluing techniques • Need for higher occupational safety measures: low but very good vapor pressure

PMDI (Polymeric diphenylmethane diisocyanate) is a commonly used Binders in wood-based panels, in particular for OSB panels. PMDI thus belongs chemically to the polyisocyanates, which by the isocyanate group are characterized. Strictly speaking here are actually talked of oligoisocyanates, since it is due to the small number of units (typically up to at most 8) is not a true polymer.

Urea-formaldehyde resins (UF)

The UF resins are the most important group in the wood-based materials industry the aminoplastic binder. These binders have one Amino group (-NH 2) either in the form of the amine bond (R-NH 2) or the amide bond (R-CO-NH2). UF resins are easy to handle and uncomplicated in the processing. You can be cold both as well as hot glue and a combination with other binder systems is possible. After pressing the cured glue joints have a thermosetting behavior, and a high strength of the glue. Special advantages of UF resins are the colorlessness and the low price in comparison to other binders. Nevertheless, the use of UF resins not completely without problems. On the one hand are made with UF resin Wood materials not insensitive to the action of moisture and Water and on the other there is a splitting off of formaldehyde during the processing and later use of wood-based materials.

to Reduction of moisture sensitivity is now becoming melamine and sometimes phenol incorporated into the UF resins. By a strong reduction of molar ratio between formaldehyde and urea, the formaldehyde emission could be greatly reduced.

Melamine and melamine blending resins (MF)

melamine resins belong as well as UF resins to the aminoplasts. The use of pure melamine resins is so good for cost reasons like not at all. Often they are used as impregnating and impregnating resins used. However, it is an admixture from melamine to other resins usual. By the addition Melamine may have limited hydrolysis resistance be improved by hardened UF resins and reached a reduction in thickness swelling. The melamine urea-formaldehyde resins (MUF) are distinguished from pure UF resins by this from that they have a higher moisture resistance and have the ability to overflow at temperatures 130 ° C without curing a special catalyst. In addition to this glue are the most common mixed resins Melamine urea-phenol-formaldehyde resins (MUPF) and phenol-melamine resins (PMF).

Binders based on renewable raw materials, eg. B. Tannins Tannins are vegetable polyhydroxyphenols (tannins) which are soluble in water, alcohols and acetone. Tannins are mainly extracted by extraction from wood, bark, leaves and fruits. There are numerous Untersu on the use of extractives from bark of mimosa and bark of various species of pine.

chemical The tannins are divided into hydrolyzable and condensed types. The use of tannins as a binder is either with a Formaldehyde component as crosslinker or in combination with amino or phenolic resins.

animal glue:

animal glue is a natural glue made from skin, leather or bone waste will be produced. Casein glue: This glue consists of milk and Lime. Resorcinol-Formaldehydharzleim (also RF-glue): Consists of liquid Glue and powdered hardener.

Low-formaldehyde polycondensation glue:

formaldehyde is needed to cure the glue resins. In the In most cases, the formaldehyde content is higher than that of the other resin components, thus a good curing is given (stoichiometric excess). however In this polycondensation glue, the reduction of free formaldehyde by addition of formaldehyde scavenger or reduction of Formaldehyde content achieved.

Formaldehyde-free dispersion glue:

Of the known white glue is a formaldehyde-free dispersion glue, based on PVAC (polyvinyl acetate) as a binder which in Water is supplied ready for use as a dispersion and as cold glue, Quick binders, veneer glue, hardener glue, lacquer glue and hot glue is available. It exists in the stress groups D2-D3. D4 gluing requires a D3 glue hardener is added before consumption. There are also D2 glues, which with the addition of a hardener the D4 quality to reach.

PU glues:

The The most modern glues for the wood sector are today the one-component PU glues (polyurethanes). They are waterproof (D4) and do not stick only wood, but almost all adhesive materials. It is about to solvent-free reactive adhesives using to harden from moisture.

Solvent for the Providing solutions containing at least one Adhesive and at least one antioxidant or at least one preservative:

suitable Solvents are solvents in which the desired adhesives, antioxidants and / or preservatives and possibly further components of the solution, if necessary, under too The help of emulsifiers can be sufficiently well introduced and those for use on wood-containing raw materials are suitable. These are, for example, water and / or other organic Solvents, such as alcohols. Suitable solvents include mixtures of water and organic solvents, such as mixtures containing alcohols or mixtures containing different organic solvents. Suitable solvents are known in the art. In particular, it may be in the finished Solution containing at least one adhesive and at least an antioxidant or at least one preservative with or without emulsifier to an aqueous solution or dispersion act. It can also be an oil or oil act greasy solution. The antioxidants and / or Preservatives can in the inventive Solution emulsified, suspended and / or dispersed.

wet:

The Wetting the wood-containing starting materials with a solution containing at least one adhesive and at least one antioxidant or at least one preservative can by any one skilled in the art known method which for contacting the wood-containing Starting materials with the solution containing at least one Adhesive and at least one antioxidant or at least one preservative is suitable to take place. Suitable methods are for. B. gluing, If necessary, treat in a rotating drum, spraying, Coating, dipping or other method of applying the solution (For example, in the MDF production also adding during cooking). Of the Addition of the antioxidants and / or preservatives may also only together with the application of the glue on the wood-containing Starting materials take place.

gluing:

gluing OSB strands: Form-fitting the beaches together To connect, they are glued before pressing. usual Glues for OSB are: MUF glue, MUPF glue, PMDI glue. Of the Adhesive is applied finely distributed on the chips. For this purpose, the beaches, for example, in a rotating Beleimtrommel where. The solution containing at least one adhesive and at least one antioxidant or at least one preservative is injected from an internal pipe. By the rotation The strands are even glued and made out of the drum.

binder coating drums are about 5 m long and have a diameter of about 2 m. she are moved by an outside engine, the rubber wheels drives, which put the Beilenimtrommel in rotation.

The used for gluing solution can be at least one adhesive and at least one antioxidant or at least one preservative contain. For better distribution of poorly soluble in water Preservatives and / or antioxidants may emulsifiers be used. Through the use of emulsifiers in the addition Preservatives and / or antioxidants for the glue are obtained an emulsion or suspension that works better in the glue and thus on can be distributed to the chips. Through a better distribution is the use of lower concentrations at constant or greater antioxidant effect possible.

Emulsifiers, for example lecithin:

emulsifiers are adjuvants that serve two immiscible ones Liquids, such as oil and water, to a finely divided mixture, the so-called emulsion, too mix and stabilize. The same applies to the mixing of solid, non-soluble substances in a liquid to stabilize a so-called suspension. The commonly referred to as surfactants find auxiliaries a broad application in pharmacy, food technology, oil industry, in the household (in detergents and water-based paints), in cosmetics and numerous large-scale industrial applications.

Links, used in the food industry as emulsifiers, are in the list of authorized in the European Union Food additives listed.

Important Emulsifiers in the food industry are lecithins and mono- and diglycerides of fatty acids.

lecithin (German: Lecithin, ancient Greek: λέκιθος = Egg yolk) is the classic name for a group of chemical Compounds called phosphatidylcholines. It acts lipids, more specifically phospholipids derived from fatty acids, Glycerine, phosphoric acid and choline put together. lecithins are components of the cell membranes of animal and plant Creature. They are accompanying substances in fats and fatty oils and especially rich in egg yolk and vegetable sperm.

lecithins allow the emulsification (mixing) of fats and water and are thus important natural surfactants (emulsifiers) for Food and feed. Lecithins are used in the EU as a food additive (E 322) for foodstuffs in general (also "organic" products) authorized with maximum quantity restriction exclusively in baby food. On ingredient lists they are called Lecithin, soy lecithin or even E 322 listed. In the Medicine and cosmetics are also used as active ingredients in the Dietetics used as a dietary supplement. Technically derived lecithin products, such as extracts from soybeans or eggs, contained depending on their sources in addition to lecithins, for the most part, other phospholipids as well as sphingomyelin and glycolipids. These groups of substances have similar physical properties like the lecithins and are also emulsifiers.

Suitable preservatives and antioxidants:

• – „Konservierungsstoffe” Stoffe, die die Haltbarkeit von Lebensmitteln verlängern, indem sie sie vor den schädlichen Auswirkungen von Mikroorganismen schützen.
• – „Antioxidationsmittel” Stoffe, die die Haltbarkeit von Lebensmitteln verlängern, in dem sie sie vor den schädlichen Auswirkungen der Oxidation, wie Ranzigwerden von Fett und Farbveränderungen, schützen.

In accordance with Annex 7 to the Addendum Authorization Regulation (ZZulV):

• - "Preservatives" Substances that prolong the shelf life of foods by protecting them from the harmful effects of micro-organisms.
• - "Antioxidants" Substances that prolong the shelf life of foods by protecting them from the harmful effects of oxidation, such as rancidity of fat and color changes.

To The above groups also include enzyme inhibitors.

According to the invention preferably the preservatives and antioxidants used in the Additive Authorization Regulation and the Cosmetics Regulation admitted are used. There also unlisted substances come for the uses according to the invention and products in question, for. 4-hexylresorcinol, NTA (nitrilotriacetate, Nitrilotriacetic acid), as well as in food naturally occurring antioxidants.

preferred Preservatives and antioxidants are those in the Additives Authorization Regulation (ZZulV) in the version valid at the filing date, in particular in their Appendices 4 and 5, and in the Cosmetics Regulation in the valid at the filing date, in particular in their Appendix 6, disclosed substances.

• - Verordnung über die Zulassung von Zusatzstoffen zu Lebensmitteln zu technologischen Zwecken (Zusatzstoff-Zulassungsverordnung – ZZulV), vom 29. Januar 1998 (BGBI I S. 231), geändert durch 1. VO zur Änderung zusatzstoffrechtlicher Vorschriften vom 13. 11.2000 (BGBI. I S. 1520), VO zur Änderung zusatzstoffrechtlicher und anderer lebensmittelrechtlicher Verordnungen vom 20. 12. 2002 (BGBI. I S. 4695)**), VO über Fruchtsaft, einige ähnliche Erzeugnisse und Fruchtnektar (FruchtsaftVO) vom 24. 5. 2004 (BGBI. I S. 1016)***), Art. 1 der VO zur Änd. der Zusatzstoff-ZulassungsVO und anderer lebensmittelrechtlicher VOen vom 20. 1. 2005 (BGBI. I S. 128)****), Art. 2 § 3 des G zur Neuordnung des Lebensmittel- und des Futtermittelrechts vom 1. 9. 2005 (BGBI. I S. 2618)1)2) und Art. 2 der VO zur Änd. lebensmittelrechtlicher und tabakrechtlicher Bestimmungen vom 22. 2. 2006 (BGBI. I S. 444).
• – Kosmetik-Verordnung, Neufassung vom 7. Oktober 1997 (BGBI. I S. 2410), geändert durch 27. ÄndVO vom 19. 12. 1997 (BGBI. I S. 3314)2), V zur Änd. kosmetikrechtlicher Vorschriften vom 25. 6. 1998 (BGBI. I S. 1622)3), 28. ÄndVO vom 18. 12. 1998 (BGBI. I S. 3773), 29. Änd.V vom 14. 6. 2000 BGBI. I S. 4), 30. ÄndV vom 21. 12. 2000 (BGBI. I Nr. 57 S. 1848), ÄndV vom 9. 11. 2001 (BGBI. I S. 3030), Art. 11 § 11 des G zur Neuorganisation des gesundheitlichen Verbraucherschutzes und der Lebensmittelsicherheit vom 6. 8. 2002 (BGBI. I S. 3082), 32. ÄndVO vom 28. 3. 2003 (BGBI. I S. 443)5), 33. ÄndVO vom 23. 4. 2003 (BAnz Nr. 79 vom 26. 4. 2003 S. 8997)6), Art. 2 der VO zur Änd. der EG-TSE-AusnahmeVO und der 33. VO zur Änd. der KosmetikVO vom 29. 9.2003 (BGBI. I S. 1951), Art. 7 des Gesetzes zur Änd. des Fleischhygienegesetzes, des Geflügelfleischhygienegesetzes, des Lebensmittel- und Bedarfsgegenständegesetzes und sonstiger Vorschriften vom 13. 5. 2004 (BGBI. I S. 934)7), Art. 1 der VO zur Änd. der KosmetikVO und zur Änd. weiterer lebensmittelrechtlicher Vorschriften vom 6. 10. 2004 (BGBI. I S. 2580)8), Art. 1 der 35. VO zur Änd. der Kosmetik-VO vom 20. 12. 2004 (BGBI. I 3569)9), Art. 1 der 36. VO zur Änd. der Kosmetik-VO vom 18. 1.2005 (BGBI. I S. 120), Art. 5 der 4. VO zur Änd. der Lebensmittel-KennzeichnungsVO und anderer lebensmittelrechtlicher VOen vom 18. 5. 2005 (BGBI. I S. 1401)10), 37. VO zur Änd. der Kosmetik-VO vom 30. 6. 2005 (BGBI. I S. 2019)11), Art. 2 der VO zur Änd. der BedarfsgegenständeVO und der Kosmetik-VO vom 13. 7. 2005 (BGBI. I S. 2159)12) und 38. VO zur Änd. der Kosmetik-VO vom 13. 12. 2005 (BGBI. I S. 3479)13).

Valid versions of the ZZulV and the Kosmetikverordnung i. S. of this application are:

• - Ordinance on the Admission of Additives to Food for Technological Purposes (Additive Authorization Ordinance - ZZulV), of 29 January 1998 (BGBI I p. 231), amended by 1st Ordinance amending additives legislation of 13.11.2000 (BGBI P. 1520), Regulation amending additives legislation and other foodstuffs ordinances of 20 December 2002 (Federal Law Gazette I p. 4695) **), Regulation on fruit juice, some similar products and fruit nectars (Fruit Juice Regulation) of 24. 5. 2004 ( BGBI. I P. 1016) ***), Art. 1 of the VO amending the Additive-Approval-VO and other food-law regulations of 20. 1. 2005 (BGBI. I P. 128) ****), Art. 2 § 3 of the G for the reorganization of the food and feed law of 1 September 2005 (BGBI I p. 2618) 1) 2) and Art. 2 of the Regulation amending the food and tobacco law provisions of 22.2.2006 (BGBI I p. 444).
• - Cosmetics Ordinance, new version of 7 October 1997 (BGBI I p. 2410), amended by 27. ÄndVO of 19. 12. 1997 (BGBI. I p. 3314) 2), V amending the amending cosmetics regulations of 25 6, 1998 (BGBI., I, p. 1622) 3), 28th Amendment to the Dec. 18, 1998 (BGBl., I, p. 3773), 29th Amendment, 14. 6. 2000, BGBl. I, p. 4), 30. ÄndV of 21. 12. 2000 (BGBI., I, No. 57, pp. 1848), Amendments of 9. 11. 2001 (BGBl., I, p. 3030), Art. 11, § 11 of the G on the reorganization of consumer health protection and food safety of 6. 8. 2002 (BGBI I p. 3082), 32. amending regulation of 28. 3. 2003 (BGBI., I p. 443) 5), 33. amending regulation of 23 6 (2) of the Regulation amending the EC TSE Exemption Regulation and the 33rd Regulation amending the Cosmetics Ordinance of 29 1951), Article 7 of the Act amending the Meat Hygiene Act, the Poultry Meat Hygiene Act, the Foodstuffs and Commodities Act and other provisions of 13 May 2004 (Federal Law Gazette I p VO amending the Cosmetics Ordinance and amending other foodstuffs legislation of 6. 10. 2004 (BGBI I p. 2580) 8), Art. 1 of the 35th VO amending the Cosmetics Ordinance of 20. 12. 2004 (BGBI. I 3569) 9), Art. 1 of the 36th VO amending the Cosmetics Regulation of 18.2.2005 (BGBI I p. 120), Article 5 of the 4th VO amending the Food Labeling Ordinance and other food law regulations of 18.5.2005 (BGBI. I S. 1401) 10), 37. VO amending the Cosmetics Regulation of 30. 6. 2005 (BGBI I p. 2019) 11), Art. 2 of the Regulation amending the consumer goods Regulation and the Cosmetics Regulation of 13. 7. 2005 (BGBI I p. 2159) 12) and 38. VO amending the Kosmetik-VO of 13.12.2005 (BGBI. I P. 3479) 13).

Some the further considered particularly effective Antioxidants or preservatives are listed below.

From Annex 4 of the ZZulV:

(E 170) calcium carbonate, (E 260) acetic acid, (E 261) potassium acetate, (E 262) sodium acetate, sodium acetate, sodium diacetate, (E 263) calcium acetate, (E 270) lactic acid, (E 296) malic acid, (E 300) Ascorbic acid, (E 301) sodium ascorbate, (E 302) calcium ascorbate, (E 304) fatty acid esters of ascorbic acid, ascorbyl palmitate, ascorbyl stearate, (E 306) strong tocopherol-containing extracts, (E 307) alpha-tocopherol, (E 308) gamma-tocopherol, (E 309) delta-tocopherol, (E 322) lecithin, (E 325) sodium lactate, (E 326) potassium lactate, (E 327) calcium lactate, (E 330) citric acid, (E 331) sodium citrate, monosodium citrate, disodium citrate, trisodium citrate, (E 332) Potassium citrates, monopotassium citrate, tripotassium citrate, (E 333) calcium citrates, monocalcium citrate, dicalcium citrate, tricalcium citrate, (E 334) L (+) - tartaric acid, (E 335) sodium tartrates, monosodium tartrate, disodium tartrate, (E 336) potassium tartrates, monopotassium tartrate , Dipotassium tartrate, (E 337) potassium sodium tartrate, (E 350) sodium malate, sodium malea t, sodium hydrogen malate, (E 351) potassium malate, (E 352) calcium malate, calcium malate, calcium hydrogen malate, (E 354) calcium tartrate, (E 380) triammonium citrate, (E 400) alginic acid, (E 401) sodium alginate, (E 402) potassium alginate, (E 403) ammonium alginate, (E 404) calcium alginate, (E 472a) acetic acid esters of mono- and diglycerides of fatty acids, (E 472b) lactic acid esters of mono- and diglycerides of fatty acids, (E 472c) citric acid esters of mono- and diglycerides of fatty acids . (E 472d) tartaric acid esters of mono- and diglycerides of fatty acids, (E 472e) mono- and diacetyl tartaric acid esters of mono- and diglycerides of fatty acids, (E 472f) mixed tartaric and acetic esters of mono- and diglycerides of fatty acids, (E 500) sodium carbonates , Sodium carbonate, sodium bicarbonate, sodium sesquicarbonate, (E 501) potassium carbonates, potassium carbonate, potassium bicarbonate, (E 503) ammonium carbonates, ammonium carbonate, ammonium bicarbonate, (E 504) magnesium carbonates, magnesium carbonate, magnesium hydroxide carbonate, magnesium hydrogencarbonate, (E 507) hydrochloric acid, (E 508) potassium chloride , (E 509) calcium chloride, (E 511) magnesium chloride, (E 513) sulfuric acid, (E 514) sodium sulfates, sodium sulfate, sodium bisulfate, (E 515) potassium sulfates, potassium sulfate, potassium bisulfate, (E 516) calcium sulfate, (E 524) sodium hydroxide , (E 525) potassium hydroxide, (E 526) calcium hydroxide, (E 527) ammonium hydroxide, (E 528) magnesium hydroxide, (E 529) calcium oxide, (E 530) Magnesium oxide, (E 570) fatty acids, (E 574) gluconic acid, (E 575) glucono-delta-lactone, (E 576) sodium gluconate, (E 577) potassium gluconate, (E 578) calcium gluconate.

From Annex 5 of the ZZulV:

(e 200) sorbic acid, (E 202) potassium sorbate, (E 203) calcium sorbate, (E 210) benzoic acid, (E 211) sodium benzoate, (E 212) potassium benzoate, (E 213) Calcium benzoate, (E 214) Ethyl p-hydroxybenzoate, (E 215) Sodium ethyl p-hydroxybenzoate, (E 216) propyl p-hydroxybenzoate, (E 217) sodium propyl p-hydroxybenzoate, (E 218) methyl p-hydroxybenzoate, (E 219) sodium methyl p-hydroxybenzoate, (E 220) sulfur dioxide, (E 221) sodium sulfite, (E 222) sodium hydrogen sulfite, (E 223) sodium metabisulfite, (E 224) potassium metabisulfite, (E 226) calcium sulfite, (E 227) potassium bisulfite, (E 228) potassium bisulfite, (E 249) potassium nitrite, (E 250) sodium nitrite, Nitrite pickling salt, (E 251) sodium nitrate, (E 252) potassium nitrate, (E 231) Othopenylphenol, (E 232) Sodium orthophenylphenol, (E 234) Nisin, (E 235) natamycin, (E 239) hexamethylenetetramine, (E 280) Propionic acid, (E 281) sodium propionate, (E 282) calcium propionate, (E 283) potassium propionate, (E 284) boric acid, (E 285) sodium tetraborate, (Borax) as boric acid; (E 1105) lysozyme, (E 310) propyl gallate, (E 311) octyl gallate, (E 312) dodecyl gallate, (E 320) butyl hydroxyanisole (BHA), (E 321) butylhydroxytoluene (BHT), (E 315) isoascorbic acid, (E 316) sodium isoascorbate, (E 310) propyl gallate, (E 311) octyl gallate, (E 312) dodecyl gallate, (E 320) butylhydroxyanisole.

From Annex 6 of the KosmetikV:

Benzoic acid, its salts and esters, propionic acid and its salts, salicylic acid and its salts, 4 2,4-hexadienoic acid (sorbic acid) and its salts, 5 formaldehyde and paraformaldehyde, 2-hydroxybiphenyl (o-phenylphenol) and its salts, phenol, 2 Zinc bis (2-thiolato-pyridine-1-oxide), (zinc pyrithione), inorganic sulfites and bisulfites, unbound SO ₂ , sodium iodate, chlorobutanol, 4-hydroxybenzoic acid, its salts and esters, 4-hydroxybenzoic acid benzyl ester, 3- Acetyl-6-methyl-2,4 (3H) -pyran-dione (dehydroacetic acid) and its salts, formic acid and its sodium salt, 1,6-bis (4-amidino-2-bromophenoxy) -n-hexane (dibromohexamidine) and its salts (including isethionate), ethylmercury (II) thiosalicylic acid, sodium salt (thiomersalum), phenylmercury and its salts (including borate), 10-undecylenic acid and its salts, 5-amino-1,3-bis (2 -ethylhexyl) -5-methylhexahydropyrimidine, (hexetidine), 5-bromo-5-nitro-1,3-dioxane, 2-bromo-2-nitro-1,3-propanediol (Bronopol), 2,4-dichlorobenzene Cyl alcohol, N- (4-chlorophenyl) -N '- (3,4-dichloro-phenyl) -urea 3-3'-4-4'-tetra- (triclocarbanum), (chloroazobenzene and 3-3'-4- 4'-tetrachloroazoxybenzene, 4-chloro-m-cresol, 2,4,4'-trichloro-2'-hydroxy-diphenyl ether, (triclosanum), 4-chloro-3,5-dimethylphenol, 1,1'- Methylenebis [3- (1-hydroxy-methyl-2,5-dioximidazolidin-4-yl) urea], (imidazolidinylurea), poly (hexamethylenediguanide) hydrochloride, 2-phenoxy-ethanol, hexamethylenetetramine (methenamine), 1- (3-Chloroallyl) -3,5,7-triaza-1-azonia-adamantane chloride, 1- (4-chlorophenoxy) -1- (imidazol-1-yl) -3,3-dimethyl-2-butanone, 1, 3-bis- (hydroxy-methyl) -5,5-dimethyl-2,4-imidazolidinedione, benzyl alcohol, 1-hydroxy-4-methyl-6- (2,4,4-trimethylpentyl) -2-pyridone, monoethanolamine salt, 1,2-dibromo-2,4-dicyanobutane, 2,2'-methylene-bis (6-bromo-4-chloro-phenol), bromochlorophene, 3-methyl-4- (1-methylethyl) phenol, 2-benzyl 4-chlorophenol, chlorophenum, 2-chloroacetamide, chlorhexidine, its acetate, gluconate and hydrochloride, 1-phenoxy-1-propan-2-ol, 4 N-alkyl (C12-C22) trimethylammonium bromide and chloride, 4,4-dimethyl-1,3-geoxazolidine, N-hydroxymethyl-N- [1,3-di (hydroxymethyl) -2,5-dioxoimidazolidin-4-yl] -N'-hydroxymethylurea, 1 , 6-bis (4-amidino-phe-noxy) -n-hexane (hexamidine) and its salts, including isethionate and p-hydroxybenzoate, glutaraldehyde (pentane-1,5-dial), 5-ethyl-1-aza 3,7-dioxabicyclo [3.3.0] octane, 3- (4-chlorophenoxy) -1,2-propanidol (chlorphenesin), sodium hydroxymethyl aminoacetate, silver chloride, benzethonium chloride, benzalkonium chloride, bromide and saccharinate, benzalkonium chloride, benzylhemiformal, 3-iodo-2-propynyl butylcarbamate, 2-methyl-3 (2H) -isothiazolone.

All particularly preferred further antioxidants and / or preservatives are selected from the group comprising BHA (E320), BHT (E321), citric acid (E330), EDTA (E385), lauryl gallate (Gallate E310 to E312), octyl gallate (E311), as well as their salts and esters.

It can also be used:

gallate:

gallate are synthetic derivatives of gallic acid. The most important, According to the Food Law permissible, gallates are: propyl gallate (E 310), octyl gallate (E 311), dodecyl gallate (E 312).

gallate are mainly used as antioxidants in the fat phase in foods and medicines.

BHA:

butylhydroxyanisole (BHA, E320) is an organic chemical compound from the group the phenol ether. It is used as a synthetically produced antioxidant used. As a food additive, it prevents rancidity of nuts and similar nibbles as well Sweets. It is also in medicines and cosmetics used.

Tartaric acid and / or tartaric acid tartrate:

The term "tartaric acid and / or tartaric acid tartrates" is understood as meaning a compound consisting of or containing tartaric acid having the empirical formula C ₄ H ₆ O ₆ , also referred to as 2,3-dihydroxysuccinic acid or 2,3-dihydroxybutanedioic acid. These include, in particular, salts and esters of tartaric acid, also called tartrates of tartaric acid. The term includes both the D - (-) -, as well as the L - (+) - form, the meso form of tartaric acid or mixtures thereof, in particular their racemates, such as the racemic acid. In particular, the term also includes alkali metal salts of tartaric acid. The tartaric acid esters in their alcohol part preferably have a branched or unbranched, saturated or mono- or polyunsaturated alkyl having a carbon chain length of from C1 to C12, particularly preferably from C1 to C8, very particularly preferably from C1 to C4.

Prefers Be antioxidants and / or preservatives in the adhesive or glue in concentrations of 200 mg / kg to 3 g / kg to be treated Wood or used from 100 mg / L to 10 g / L solution. Especially the solution according to the invention can be antioxidants and / or preservatives in a concentration of ≤ 10 g / l, preferably ≤ 6 g / l.

Prefers Be antioxidants and / or preservatives in the adhesive or glue in concentrations of 3 g / kg each to be treated wood or from 10 mg / L to 100 g / L solution.

Prefers The antioxidants and / or preservatives are used in the the additive regulation for food and cosmetics legally permissible concentrations. All particularly preferred are the antioxidants and / or preservatives in concentrations of 200 mg / kg to 3 g / kg of wood with and without emulsifiers used. Preferably, the at least one antioxidant or the at least one preservative in a concentration of ≤ 10 g / l, preferably ≦ 6 g / l, very particularly preferably ≦ 3 g / l ago.

Especially can be considered the at least one antioxidant or the at least one Preservative tartaric acid and / or salts or esters used of it.

The Ratio of tartaric acid and / or tartaric acid tartrates or from gallates to another antioxidant or preservative with and without emulsifiers in an inventive Solution can be selected from a range of 10: 1 to 1:10, preferably from 5: 1 to 1: 5. This is particularly preferred Ratio 1: 1.

The in particular solution according to the invention Tartaric acid and / or tartaric acid tartrates and / or gallates and / or salts or esters thereof in equal concentration proportions each preferably in a concentration of ≤ 6 g / l, more preferably each ≤ 3 g / l.

In this case, according to the invention, at least one or more, different preservatives, antioxidants and combinations thereof, with and without emulsifiers, in a solution or in different solutions, in a single step (for example, when gluing in the adhesive) or in several, different process steps (for example, both in a solution before drying the wood-containing starting materials is used, and also contained in the adhesive during the subsequent gluing), are used at one or more points in the process according to the invention.

• a) Einsatz von holzhaltigen Ausgangsstoffen,
• b) Benetzen der holzhaltigen Ausgangsstoffe mit einer Lösung enthaltend mindestens einen Klebstoff und mindestens ein Antioxidanz.

An embodiment of the process according to the invention for the production of wood-containing intermediate products for further processing into wood-based materials, in particular OSB, and solid wood products, comprises the steps:

• a) use of wood-containing starting materials,
• b) wetting the wood-containing starting materials with a solution containing at least one adhesive and at least one antioxidant.

Especially can in the process of the invention wood-containing starting materials are used, the wood particles and / or Include solid wood parts.

in the Processes according to the invention can be with a solution containing at least one adhesive and at least one antioxidant or at least one preservative wetted, wood-containing starting materials, preferably wood particles and / or Solid wood parts to be subjected to a pressing step.

• a) Einsatz von holzhaltigen Ausgangsstoffen, ggf. getrocknet,
• b) Benetzen der holzhaltigen Ausgangsstoffe mit einer Lösung enthaltend mindestens einen Klebstoff und mindestens ein Antioxidanz oder mindestens einen Konservierungsstoff,
• c) Pressen der benetzten holzhaltigen Ausgangsstoffe.

A process which is particularly suitable for the production of wood-containing intermediates for further processing into wood-based materials, in particular OSB, comprises the steps:

• a) use of wood-containing starting materials, optionally dried,
• b) wetting the wood-containing starting materials with a solution containing at least one adhesive and at least one antioxidant or at least one preservative,
• c) pressing the wetted wood-containing starting materials.

In a process for the preparation of wood-containing intermediates for further processing into wood-based materials, in particular OSB boards may contain wetting with a solution at least one adhesive and at least one antioxidant or at least a preservative if necessary, both before drying the wood-containing Starting materials, as well as after drying, or to a take place at another appropriate time in the procedure, the Solution then possibly also contain other ingredients.

The method according to the invention also comprises methods in which both before an optional drying of the wood-containing Starting materials containing a wetting with a solution at least one antioxidant or at least one preservative takes place, as well as after an optional drying together with gluing using a solution containing at least an adhesive and at least one antioxidant or at least one Preservative, and optionally contains other ingredients. It can be the same or the same in the two solutions different preservatives, antioxidants or combinations to be included.

• a) Einsatz von holzhaltigen Ausgangsstoffen,
• b) Benetzen der holzhaltigen Ausgangsstoffe mit einer Lösung enthaltend mindestens ein Antioxidanz oder mindestens einen Konservierungsstoff,
• c) Gegebenenfalls Trocknung des Produktes aus Schritt b),
• d) Benetzen des Produktes aus Schritt c) mit einer Lösung enthaltend mindestens einen Klebstoff und mindestens ein Antioxidanz oder mindestens einen Konservierungsstoff,
• e) Gegebenenfalls Pressen des Produktes aus Schritt d).

A preferred process for the preparation of wood-containing starting materials for further processing into wood-based materials, in particular OSB, comprises the steps:

• a) use of wood-containing starting materials,
• b) wetting the wood-containing starting materials with a solution containing at least one antioxidant or at least one preservative,
• c) optionally drying the product from step b),
• d) wetting the product from step c) with a solution containing at least one adhesive and at least one antioxidant or at least one preservative,
• e) optionally pressing the product from step d).

The Processes according to the invention are not based on wood Limited starting materials of a particular type of wood. It can also use different woods alone or together in a process as mixed or separate wood-containing starting materials are processed.

Especially the method is suitable for processing wood-containing starting materials, softwood, in particular pine, preferred by Pinus sylvestris, contain.

Another The invention relates to wood-containing intermediates for further processing into wood-based materials, in particular OSB, and Solid wood products, characterized in that the wood-containing Starting materials with a solution containing at least one Adhesive and at least one antioxidant or at least one preservative were wetted.

object The invention also includes wood materials, preferably OSB boards, and Solid wood products, which are characterized in that the wood materials or solid wood products contain wood-containing starting materials, the with a solution containing at least one adhesive and at least one antioxidant or at least one preservative were wetted or wood-containing intermediates, which after a the process of the invention are made.

The Preservatives and / or antioxidants can do so be used, the wood-containing invention To produce intermediates.

The Preservatives and / or antioxidants may be used in a process according to the invention for the preparation be used by wood-containing intermediates.

at The above uses and methods include the following preservatives and antioxidants are preferred, either singly Antioxidant or as a single preservative or in combination of several different preservatives and / or antioxidants: BHA (E320), BHT (E321), citric acid (E330), EDTA (E385), Lauryl gallate (Gallate E310 to E312), octyl gallate (E311), tartaric acid (E334), also their salts and esters. A preferred combination of Preservatives and antioxidants contain tartaric acid and citric acid.

In the method of the invention can several, different preservatives and / or antioxidants and / or combinations thereof can be used, in particular the solution containing at least one adhesive and at least an antioxidant or at least a preservative citric acid and / or tartaric acid and / or citric acid and / or Contain tartaric acid tartrate.

The wood-containing intermediates according to the invention may be characterized in that the at least an antioxidant or the at least one preservative selected is from the group containing BHA (E320), BHT (E321), citric acid (E330), EDTA (E385), lauryl gallate (Gallate E310 to E312), octyl gallate (E311), tartaric acid (E334), as well as their salts and esters.

The The present invention also relates to a use of at least one antioxidant or a preservative Production of Wood-containing Inventive Intermediates, in particular, can at least an antioxidant or a preservative can be used that is selected are from the group containing BHA (E320), BHT (E321), citric acid (E330), EDTA (E385), lauryl gallate (Gallate E310 to E312), octyl gallate (E311), tartaric acid (E334), as well as their salts and esters.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• WO 06/032267 [0007]

Claims (15)

Process for the preparation of wood-containing intermediates for further processing into wood-based materials, in particular OSB or solid wood products, comprising the steps: a) Use wood-containing raw materials, b) wetting the wood-containing Starting materials with a solution containing at least one Adhesive and at least one antioxidant or at least one preservative. Method according to claim 1, characterized in that that the solution contains at least one antioxidant. Method according to one of claims 1 or 2, characterized in that as wood-containing starting materials wood particles or solid wood parts are used. Method according to one of claims 1 to 3, characterized in that the product of step b) pressed becomes. Method according to one of claims 1 to 4 for the production of wood-containing starting materials for the further processing to wood materials, in particular OSB, comprising the steps: a) use of wood-containing starting materials, b) Wetting the wood-containing starting materials with a solution containing at least one antioxidant or at least one preservative, c) Optionally, drying the product from step b), d) wetting the product from step c) containing a solution at least one antioxidant or at least one preservative and at least one glue, e) If necessary, pressing the Product from step d). Method according to one of claims 1 to 5, characterized in that the wood-containing starting materials Softwood included. Method according to one of claims 1 to 6, characterized in that the wood-containing starting materials Pinewood, preferably from Pinus sylvestris. Method according to one of claims 1 to 7, characterized in that the preservatives and / or Antioxidants are selected from a group containing BHA (E320), BHT (E321), citric acid (E330), EDTA (E385), Lauryl gallate (Gallate E310 to E312), octyl gallate (E311), tartaric acid (E334), as well as their salts and esters. Method according to one of claims 1 to 8, characterized in that several different preservatives and / or antioxidants and / or combinations thereof become. Method according to one of claims 1 to 9, characterized in that the solution containing at least an adhesive and at least one antioxidant or at least one Preservative citric acid and / or tartaric acid and / or citric acid and / or tartaric acid tartrates contains. Wood-containing intermediates for further processing to wood-based materials, in particular OSB and / or solid wood products, characterized in that the wood-containing starting materials with a solution containing at least one adhesive and at least one antioxidant or at least one preservative were wetted. Wood-containing intermediates according to claim 11, characterized characterized in that the at least one antioxidant or at least a preservative is selected from the group containing BHA (E320), BHT (E321), citric acid (E330), EDTA (E385), lauryl gallate (Gallate E310 to E312), octyl gallate (E311), Tartaric acid (E334), as well as its salts and esters. Wood materials, in particular OSB, characterized that the wood-based materials contain wood-containing intermediates after a of claims 11 or 12 included. Use of at least one antioxidant or a preservative for the production of wood-containing intermediates according to one of claims 11 or 12. Use of at least one antioxidant or A preservative according to claim 14, characterized in that that the at least one antioxidant is selected from the group containing BHA (E320), BHT (E321), citric acid (E330), EDTA (E385), lauryl gallate (Gallate E310 to E312), octyl gallate (E311), tartaric acid (E334), as well as their salts and esters.