EP2493670A1

EP2493670A1 - Wooden element containing natural rubber, use thereof and method for the production thereof

Info

Publication number: EP2493670A1
Application number: EP10778598A
Authority: EP
Inventors: Roland Stelzer; Andreas MÜLLER
Original assignee: Individual
Current assignee: Elamat GmbH
Priority date: 2009-10-28
Filing date: 2010-10-27
Publication date: 2012-09-05
Also published as: WO2011051339A1

Abstract

A description is given of a wooden element containing natural rubber, introduced by impregnation with, impingement of or saturation with a rubber latex and subsequent drying. The rubber introduced into the wooden element can also be vulcanized. The advantageous use of this wooden element in buildings, domestic fixtures and fittings and in vehicles on land and in water as well as a method for the production thereof are also described. This wooden element is distinguished by a particularly high degree of resistance to rotting. Moreover, in addition to further advantageous properties, it has a desirable degree of elasticity.

Description

MEISSNER BDLTE

PO Box 860624

81633 Munich

New International (PCT) Patent Anticipation 27.10.2010

1. Applicant: Roland Stelzer u. Z. L / 2915/001-PC

2. Applicant; Andreas Müller HG / gs / jl / hm / os / rs

Wood articles containing rubber, their use and process for their preparation

The Journal of Biological Sciences 6 (3): 490-500, 2006 relates to the use of a trans-1,4-isoprene rubber as a hot-melt adhesive for joining wood parts, in particular for the production of particleboard. Here, natural rubber (TIR Gutta Percha), Synthetic rubber (TIR Synthetic) and maleic anhydride-modified MTIR Gutta Percha and MTIR Synthetic are tested as adhesives in a hot pressing process to produce plywood. With maleic anhydride modified rubber variants lead to better results. Also, GB 225,251 (published 1924) is essentially concerned with a hot pressing process for producing wood composites using a hot melt adhesive. Here, wood panels are bonded by means of rubber as a hot melt adhesive. The wood composite bodies produced in this way should be impermeable to water. The prior art described above does not go much beyond the technical idea of producing composite materials by hot melt adhesive. In particular, it is not intended to give the wooden parts to be joined with special properties, which is a particular aspect of the invention described below.

Finally, it should be noted that in particular to avoid a rapid rotting of wood, it is state of the art to use wood preservatives. For example, impregnating liquids based on ES, glycol or organic solvents containing active substances, in particular biocides, are used in order to protect the surface of wood against adverse weather effects. Moreover, it is common to use wood bodies, for example when used in wood Protect windows by an aluminum shell or a sanding surface is attached.

The invention has for its object to provide a technical proposal with which it is possible to give the treated wood bodies or wood materials in particular high resistance to rotting, desirable elasticity and strength set.

According to the invention, the above object is achieved by a wood body containing a rubber, introduced by impregnation with a rubber latex and subsequent drying. The invention further advantageous uses of this wood body and a suitable method for its production, which will be discussed later.

The core of Hoizkörpers invention consists in the combination of the natural material wood and a synthetic or natural rubber latex to a new wood material or wood body with particularly advantageous properties.

Wood is a pleasant building material that has been used for thousands of years and is characterized by being easy to work with. Wood consists in particular of cellulose, hemicellulose and lignin as well as of various other additives, such as minerals. Due to the wood-own cell structure this has an "asymmetric" strength profile. Hardness and firmness depend on the lignin content, which strengthens the cell wall. Wood rots under the influence of water, oxygen, bacteria, fungi and / or insects. Due to the mentioned cell structure of the wood, there is "empty space" between the cells and in the cells. The term "wood" within the meaning of the invention should be understood as far as possible. It is not only to be understood as a classic wooden material as a starting material, but also as one that could be called "wood-like". It is important that the starting material in the form of a wood-like material contains the essential components of the wood, such as cellulose, hemicellulose and lignin. Thus, the term "wood" is also intended to encompass such materials as bamboo, grasses such as palm grasses, and the like.

The technological background from which the present invention is based is to fill these "empty spaces" of wood or wood-like materials with a natural or synthetic rubber. In this case, the invention makes use of the of a liquid latex in which the liquid phase is preferably aqueous. This aqueous latex, which may be a synthetic rubber and / or natural rubber, has a high water content, which keeps the latex liquid and allows the desired impregnation within the scope of the invention. The water content of the latex is preferably between about 25 and about 65 wt.%, In particular between about 35 and 50 wt .-%, The latex used for preservation and stabilization example Be! with ammonia, wherein the maximum amount of ammonia in the latex is preferably 0.8% by weight. The inclusion of ammonia also has the advantage of delaying premature lumping of the latex particles in the liquid latex.

In individual cases, it may be expedient to reduce the particles dispersed in the aqueous latex by additional measures in their diameter in order to promote the impregnation of the wood with the latex described below. This may be due to the fact that the wood has different sized pores, so that in individual cases with sufficient pore size, such a measure is not required, in the other case, however, is required. In this regard, there are various Einwirkungsmögiichkeiten. For example, come here with water readily miscible solvents such as methanol, ethanol, acetone or the like. In question. In individual cases, it may be useful to include an aromatic, such as toluene, which should escape in the subsequent treatment under heat. The amount of the diameter of the dispersed rubber particles of reducing organic liquid in the latex depends on the individual case. This can be determined purely expert.

According to the invention, a drying or heating of the liquid latex, in particular the aqueous latex, by impregnation, impingement or impregnation of the wood, wherein the liquid phase, in particular water, but also the addressed solution center! and / or ammonia are evaporated. The initially present in the impregnated, acted upon or impregnated wood rubber can be converted by crosslinking or vulcanization of an originally plastic in the elastic state. In any case, whether elastic or plastic, the rubber material within the wood body is very well connected to it. It should be noted that when the following is only spoken of "impregnation", the corresponding statements should also apply to "soaking" or "admission".

The rubber material of the latex does two things. On the one hand, the rubber fills out the cell structure of the wood and reinforces and protects it. On the other hand The rubber connects neighboring Hoizteile or layers. The strength of the wood body according to the invention is higher than that of the starting material or the wood strength of the wood material used for the treatment according to the invention.

In the context of the invention, a rubber is to be understood as meaning the following: Rubber is the name (according to DIN 53 501, November 1980) for uncrosslinked, but crosslinkable (vulcanizable) polymers having rubber-elastic properties at room temperature. At higher temperatures and / or under the influence of deforming forces rubber shows viscous flow, rubber can therefore be processed under suitable conditions, as they can be maintained according to the invention, shaping. The curability or vulcanizability of the rubber in the context of the invention presupposes the presence of functional groups, e.g. unsaturated carbon / carbon bonds, hydroxy or isocyanate groups, precursor, via the multi-functional reagents in a process called vulcanization rubber molecules are intermolecularly linked (cross-linked). Rubber is systematically divided into natural rubber and synthetic rubber. These terms are familiar to the person skilled in the art. Both types of rubber are suitable for achieving the object of the present invention. The term "rubber" or rubber latex is to be understood as far as possible. In detail:

It has been found that the natural rubber is particularly advantageous from a variety of perspectives, in particular the ecological aspect plays a role. The natural rubber is a product which is taken in particular from the rubber tree (Hevea brasiliensis). However, there are other natural rubber types, but some have other properties. These are, for example, balata (Balata tree), chicle gum (pear apple tree), gutta-percha (gutta-percha) and guayule gum (guayule plant). Natural rubber consists of the monomer isoprene (2-methyl-1,3-butadiene, C5H8), which is polymerized in an extremely uniform structure to the terpene cis-l, 4-polyisoprene. It is assigned to the polymer pens. Its content in rubber makes up over 99%.

Synthetic rubbers can also be used in the context of the invention. These are exemplified below, their specification being indicated in parentheses: butadiene rubber (like natural rubber double bonds in the main chain), ethylene-propylene rubber (saturated main chain), polyether amides (nitrogen in the main chain), epoxide rubbers ( Oxygen in the main chain), urethane Rubbers (nitrogen and oxygen in the main chain), silicone rubbers (siloxane groups in the main chain), Potysuifid rubber (sulfur in the main group).

Of the synthetic rubbers referred to above, the "styrene-butadiene rubber" is particularly advantageous., Its abbreviation is SBR It is a copolymer of 1,3-butadiene and styrene SBR typically contains about 23.5% styrene and about 76.5% The higher the styrene content, the more thermoplastic the rubber becomes, but remains crosslinkable. In addition to the silicone rubber it should be noted that here for example of mixtures of silicone polymers, optionally with additional fillers, in the form of a latex for impregnation , optionally with subsequent cross-linking, can be introduced into the Hoizkörper.

Of all the types of rubbers of natural or synthetic origin, the natural rubber is preferred, although the butadiene rubber in precipitated form leads to particularly advantageous wood bodies obtained according to the invention.

For the preferred embodiments of the wood body according to the invention according to the subclaims 2 to 7, the following can be carried out;

Thus, it is preferable that the wood body contains a vulcanized rubber for adjusting elastic properties. It is preferable that the timber body is provided on wood of pine, larch, beech, eucalyptus, fir, poplar or pine in particular ^¬ sondere for building purposes, but also to wood from beech, pine, oak, ash, chestnut, birch, cherry, Maple or nut provided especially for furniture equipment, be ^¬ rests. It is preferable that the wood body contains a vulcanized rubber for adjusting elastic properties. For this purpose it is possible to resort to the vulcanization systems available to the industry, which in particular include activators (zinc oxide, stearic acid), vulcanizing agents (sulfur-soluble to 2 phr in natural rubber, peroxides), accelerators, curing systems, retarders (N-cyclohexylthiophthalimides (CTP), bis (3-triethoxysilylpropyl) tetrasulfane (TESPT)), temperature, time and other parameters suitable. In addition, it is preferable that the timber body for property control additives are incorporated that make the rubber resilient, in particular against fire (in ^¬ play (dialkyl) para-phenylenediamine (PPD)), oxidation (phenylene diamines), oxygen (polymerized dihydroquinones, also against the negative effect of heavy metals), ozone (phenylenediamine), light (PPDs), temperature (PPDs), bacteria and fungi (sodium dimethyldithiocarbamate, sodium 2-mercaptobenzothiazole, tetra- methylthiuram disulfide, dicarboximides, triazines). Mechanical properties, such as the adhesion to the wood, for which the harmless 2,5-di-tert-amylhydroquinone example! Toughness, elasticity, strength, damping, tensile strength, load capacity and longevity (alkyl-aryl PPDs, mercaptobenzothiazole (MBT), waxes) can also be improved by additives (in particular also by carbon black, silica , Silanes with coupling agents, such as bis (3-triethoxysilylpropyl) tetrasulfan (TESP), and polybutadiene). The optical properties can also be optimized by using pigments and / or dyes. To avoid unwanted discoloration, phenolic antioxidants and / or amines can be used. Preferably, the additives are selected from the viewpoint of health and environmental friendliness.

For setting other desired properties, in particular for improving the weather resistance, surface coatings may be advantageous. If necessary, paintings are made here. It is particularly preferred if natural rubber is contained as rubber in the wood body according to the invention. Furthermore, it is preferred if the wood body is present as a wood panel, wood body with a layer structure, as a molded part of compressed wood chips, rod and / or rod.

As stated above, the wood bodies of the invention show surprising advantageous properties. This results in many useful uses;

The use of the Hoiz body according to the invention in the construction and furnishing sector, in the broadest sense, is of high economic interest. Although the advantages are different for the different products, they are particularly manifested in a prolonged service life, better processability, advantageous weight savings and desirable elasticity and strength.

In the construction sector, the invention is particularly advantageous in windows, doors, trusses, laths, building materials, timber with a variety of uses, fences, roofing, pergola / carports / gazebos, slats, support elements of all kinds (eg signs or with static task), bridge parts , Jetties and moorings on the water, as well as for restorations in damp places. In the field of equipment, the present invention obtains particularly practical value in floor coverings, terrace coverings, garden furniture, Park benches, furniture, handrails, countertops, bed slats, designer light switches, door handle sets and fittings. In other areas, the invention leads to particular advantages, such as boat building / shipbuilding, caravans, trailers, handcart, tool shafts, designer jewelry, watch cases / bracelets, model making, in vessels, covers, housings, buttons, rivets, seats for cars , Child seats, etc. and vibration dampers.

The invention further relates to a process for its production. This is characterized in that the optionally predried wood body in a latex or colloidal dispersion, in particular aqueous dispersion, of vulcanizable rubber, optionally at elevated temperature, impregnated and then dried. In this case, the above statements, which deal with modifications, such as the modification of the dispersant water by miscible organic solvents, such as methanol and the like., Or also the modification by inclusion of ammonia,

The process according to the invention can be advantageously developed as follows:

Thus, it is advantageous if the impregnation, impingement or impregnation is carried out until an equilibrium state has been established. The temperature is not critical here. Nevertheless, it is preferred, when impregnated to a temperature of about 30 to 100 ° C, in particular 70 to 90 ° C, preheated wooden body, optionally with a preheated liquid, especially aqueous latex. The term "impregnated" is abstracted. He should also include "charged" and "soaked". As shown, it may be advantageous that also the aqueous latex, such as the starting material of the Hoizkörpers, is preheated. In this case, the temperature of the aqueous latex is adjusted to at least about 30 ° C before the impregnation, in particular about 30 to 70 ° C, wherein the range of 40 to 60 ° C is particularly preferred.

It may be favorable in a particular case that the inventive method is performed several times. It may furthermore be of particular advantage if the latex contains additives in order to set desired properties, in particular those additives which have been treated above in connection with vulcanization system, antioxidants, fillers, pigments, dyes, fungicides etc., For impregnating or impregnating wood-based materials, a distinction is usually made between non-printing processes which are less intensive, printing processes which permit intensive treatment, and special processes. For the impregnation according to the invention, especially the printing process come into question. Here one differentiates between low pressure and high pressure procedures. Low pressure processes include vacuum impregnation, double vacuum impregnation, Desovag combination impregnation and the well-known juice displacement method (eg Boucherie, Wecke, Gruber). High-pressure processes are the full impregnation (Breant, Bethell), the savings impregnation after Rüping and after Lowry, the Schwenkkesseltränkung and the alternating pressure method according to Henriksson. It will be understood by those skilled in the art that the different types of wood can also be impregnated differently, this in view of the Spezieile wood species, but also on the present in each wood pore size. This may be different for the same wood material, but depending on age. For example, sapwood is usually good, for example, in pine and larch, but only slightly impregnated spruce, while heartwood is rather difficult to soak.

All processes work with a typical sequence of normal, over and under-pressure phases, the order, duration and pressure curve of which depend on the type of wood, the impregnation medium, the desired impregnation intensity and the penetration septa. In testing the invention, it has been found that a pre-compression phase process is generally less suitable. As a rule, it is expedient to carry out an impregnation with an initial vacuum phase before the impregnating agent is applied. It then follows the cycle with exposure to impregnating agent in low pressure, then finally advantageously a pressure phase and a subsequent low-pressure phase. It may be expedient if this cycle is carried out several times.

Although not economically sensible in every case, one could achieve a better result of the impregnation by an enzymatic pretreatment of the wood in individual cases, whereby enlarged pores in the wood can be obtained by destroying the spotted membrane.

On the other hand, in some cases it is advantageous to first set the wood under vacuum so that the air in the empty parts of the wood is removed before impregnation. This also applies to the water originally present in the wood. This measure facilitates the introduction of the rubber latex. The temperature which is expediently chosen during the impregnation, application or impregnation is not subject to any critical limitation. This is to be determined expertly in the individual case. Thus, it can generally be assumed that the temperature of the liquid latex, in particular the aqueous latex, during impregnation is preferably between about room temperature (20 ° C) and 80 ° C. Particularly advantageous results are achieved when the temperature during the impregnation with the latex is between about 30 ° C and 70 ° C, in particular between about 40 ° C and 60 ° C. The temperature should be chosen so that the viscosity of the impregnating liquid is as low as possible, but depending on the set Vulkanisiersystem the beginning of the vulcanization is not much use, because this is a good impregnation against.

Since the natural rubber is of particular advantage in the context of the invention, the butadiene rubber also being of value among the enumerated alternatives, the relevant vulcanizers are listed as follows:

For vulcanization with sulfur are as activators metal oxides such as zinc oxide, and stearic acid and as accelerators mercaptobenzothiazole (MBT), benzothiazyl and benzothiazole, sulfenamide, thiuram disulfide, thiuram tetrasulfide, dithiocarbamate (with sodium for natural rubber and SBR and lower temperatures, with copper only for SBR, with zinc for natural rubber and durability, with nickel also antioxidant effect) as well as guanidines of advantage. As retarder N-Cyclohexylthiophtha! Imid (CTP), bis (3-triethoxysiiylpropyl) tetrasulfan (TESPT), bis (citraconimidomethyl) benzo! come into use. Thiophthalimide prevents premature vulcanization. For vulcanization with peroxides, methacrylates can be added as a support. Dibutyl peroxides and dicumyl peroxides can be used for SBR, while dibenzoyl peroxide can also be used for Naturkatuschuk. The degree of vulcanization and the fillers of the vulcanizing agent used have an influence on the hardness of the vulcanized material and consequently on the strength of the finished wood body. An alternative vulcanization method is based on the .beta.-radiation. However, this method is more expensive. But it avoids sulfur.

The impregnated wooden body must be dried. The drying can be done in various ways, for example by irradiation, for example by IR irradiation, but also by irradiation with microwaves, by a hot press and by hot air. The drying of the impregnated wood body and the vulcanization, which can partially overlap with the drying process, can be done in two steps, therefore, even at different temperatures. It is zugt to already select the temperature during drying so that at the same time the desired vulcanization or crosslinking of the introduced rubber types is effected. For economic reasons, it may be advisable to connect to a drying phase a "resting phase" for vulcanization, so as not to occupy expensive machine capacity unnecessarily long.

The above-mentioned vulcanization can be effected by incorporating sulfur and heating the impregnated wood body to temperatures of, for example, about 70 ° to 140 ° C, so that the desired vulcanization proceeds. The actual temperature selected in each case also depends on which vulcanizer used and what degree of crosslinking is desired in terms of elasticity or hardness. Unvulcanized rubber is viscoelastic as it is converted to the elastic state by vulcanization. Rubber, vulcanized from natural latex, leads to particularly favorable elastic properties of the wood body according to the invention.

As explained in more detail below, a plate-shaped wooden body produced according to the invention can be pressed under heat and pressure into a laminar composite body. This is done, for example, with each soaked in unassembled state wood panels, veneer panels, wood straps, pieces of wood, wood moldings, etc., then after soaking and before drying, before the Vulcanization has clearly started, put together and then pressed together and dried. The person skilled in the art will readily recognize that he can modify this process for producing composite structures using the inventive concept. Also, in individual cases, various plate-shaped wooden bodies according to the invention can be connected to each other by making a pressing with hot melt adhesives at a suitably high temperature. In this regard, reference is made to the possibilities presented at the beginning of the use of rubber materials for joining wood parts to wood composite bodies. Accordingly, it is important that ultimately there is a layered composite structure in which the inventive concept has been realized in the individual layers, either with or without vulcanization of the latex particles. In addition to the wood composite bodies or layered plates it should be noted that it is expedient to expel the water from these as quickly as possible before the latex has largely hardened. In this case, a high temperature plays a role for the water, while in the case of latex a warmth, avoiding prolonged exposure to the air, otherwise losing the desirable consistency,

In the following, the invention will be explained in terms of technology, in particular in connection with advantageous properties that appear in this case:

Due to the particular impregnation of the wood according to the teaching of the invention, its rotting is prevented or at least substantially reduced compared to comparative products. The reason for this is that no water, no air and no bacteria, fungi and insects can penetrate into the wood due to the introduced rubber. These substances or microorganisms remain on the surface and therefore can not cause adverse effects within the wood body. They are held by the latex used, in particular by the rubber contained therein, since it is hydrophobic. Especially insects do not recognize this material as wood (missing wood odor). As a result, a much longer life of the wood body produced from the original wood material is achieved.

Crack formation due to temperature fluctuations plays an important role in the rotting of wood bodies. These cracks are greatly reduced by the elastic properties of the incorporated rubber. The resistance to rotting can be measured by known methods. For example, durability classes (1 to 5) are classified according to DIN EN 350-102. In addition, there are field trials with earth contact according to DIN EN 350-1.

The invention not only proves to be particularly advantageous in that the mentioned rotting is largely prevented. Thus, in a desirable manner, the elasticity of the wood body according to the invention can be raised above that which comprises the original wood material or known coated wood panels. The dried out latex, i. Rubber, joins together brought together wood parts, Depending on the shape of the elasticity comes to fruition differently. Especially with sandwich panels, the flexural elasticity is higher. This elasticity can be controlled by the degree of impregnation.

In the context of the invention, as shown, the impregnation of the wood with the latex, in particular a complete impregnation, plays an important role. So it makes sense to make thin wood panels plywood or multiplex panels or the like. For some products, rods and rods are useful. Such plates can be machined in a conventional manner by cutting (sawing, turning, milling, drilling, grinding, etc.). From Veneer moldings are pressed, which can not be made with wood alone or at least are more stable than wood. It is also possible to impregnate solid or already finished wood materials with rubber latex. If the rubber latex is able to penetrate the wood material, then new materials with favorable properties, in particular an improved resistance to rot, can be achieved. The elasticity increases and the strength equally. It has been found that during impregnation, depending on the type of wood, penetration depths of at least 10 mm are achieved, whereby a rough frame of about 10 to 40 mm could be specified. These penetration depths can also be exceeded when pressure and / or elevated temperature are used. Finally, it is possible very small parts, such as Hoizspäne, to impregnate according to the invention with rubber latex. The drying of the rubber latex results in a wood body according to the invention, in which the wood chips are firmly bound. The dehydration can take place in forms. The dried mass can be processed to get specific shapes. For product ideas, some require processing in this way.

Depending on the geometry of the wood body, the strength may be higher than with the original wood source material. The strength of the wood body according to the invention is at least that of the starting material (ie the untreated wood workpiece). The combination of different proportions of wood by the rubber latex or the rubber material may result in a desirable reinforcement. This depends on the geometry and the loading equipment. Damage and quirks play no relevant role in the material according to the invention. An occurring optical defect is balanced by the verb ^¬ provement of various properties, especially to improve the rot resistance and the increase of the elasticity. Unimpregnated wood is subject to increased rotting if damaged.

It is surprising that the wood body according to the invention, if it is used for example in facilities that are subject to a strong noise transmission, leads to a reduced noise transmission.

The timber body of the invention further shows the advantage that it allows to secondary products using new production methods in his proces ^¬ processing. For example, rods of the timber body can be more deformed due to its elastic properties and egg ^¬ fitted as solid pieces of equal Shape. This allows new processing paths. Among the particular advantages of the wood body according to the invention is to mention that it is ecological. He prefers to use renewable resources and is therefore sustainable. In addition, he can easily be recycled. Its longer life increases sustainability compared to a pure wood product. It is advantageous that the energy input for a consumer cycle is lower than for a pure wood product. In addition, the advantageous properties of the wood-based materials according to the invention are the significantly low maintenance costs. Thus, wooden windows or wooden materials of boats must be painted regularly. These costs are significantly reduced by the wood body, while maintaining the good properties of the wood.

The wood body according to the invention continues to look like wood, although it has a slightly shiny surface. However, the feel is not identical to that of normal wood. The wooden body jumps back when dropped on the ground. The sound of impact is more subdued than solid untreated wood. This goes back to the already mentioned increased elasticity. If the piece of wood is in the water or in the soil for a long time, no changes occur.

The invention will be explained in more detail with reference to examples. Here, smaller coated pieces of wood are produced. So wood chips were soaked in rubber milk for some time. Then the wood slides were taken out of the milk, stacked and pressed with a vice. While heating the pressed block, the latex water was dried out. Details are given in the following examples.

example 1

Wood veneer inserts (10 cm × 5 cm × 1 mm) were impregnated with natural rubber milk (commercially available, origin: India, water content 40% by weight) at room temperature (20 ° C.) for a period of 1 h, after which 15 plates were added Room temperature (20 ° C) compressed. Subsequently, the compact was heated in a heating oven with hot air at a temperature of 170 ° C. This resulted in more compact blocks (10 cm x 5 cm x 2 cm). When pressed at the said high temperature, the water introduced into the wood by impregnation with the natural rubber milk was expelled. In a similar way thinner plate workpieces (eg 8 mm thick) were produced. The following tests were carried out with these workpieces: They were planed, sawn or ground using standard tools. There were no impairments compared to normal wood. The workpieces were pressed in the direction of the brain (pressing direction, ie in the longitudinal direction) in a vise. The new material was much more stable than normal plywood. Much more force is needed to break the workpiece or break it.

Over eight weeks, two workpieces and a conventional plywood were buried in the ground. The conventional wood was then swollen and crumbly. The workpiece according to the invention had no visible changes. This shows a significant rot resistance. In addition, the new workpiece was tested in colored foods or semi-luxury foods, such as tomato sauce and red wine. The material absorbed virtually no color, which did not apply to the conventional comparison material.

Example 2

Here, according to the procedure of Example 1 thin veneer strips were soaked in rubber milk. While still wet, these veneer strips were rolled up and then dried in a rolled state in the oven with hot air at 170 ° C. The dried and rolled material piece was elastic. A force was applied. When finished, the original form returned. This was also the case when the force was applied repeatedly,

* * *

Claims

New international (PCT) patent application 27.10.2010

1. Applicant: Roland Stelzer u. Z.: L / 2915/001-PC

2. Applicant: Andreas Müller HG / gs / jl / hm

claims

Wooden body containing rubber incorporated by impregnation with an aqueous rubber latex and subsequent drying.

Wooden body according to claim 1, characterized in that it contains a vulcanized rubber for adjusting elastic properties,

Wooden body according to claim 1 or 2, characterized in that it on wood of pine, larch, beech, eucalyptus, fir, poplar or pine, especially intended for construction, or beech, pine, oak, ash, chestnut, birch, cherry, maple or nut, especially intended for furniture equipment.

Wooden body according to at least one of claims 1 to 3, characterized in that it contains additives for property control, in particular pigments, dyes, fillers, in particular carbon black, plasticizers, UV stabilizers and / or Flammschutzmittei.

Wooden body according to at least one of claims 1 to 4, characterized in that the rubber is in the form of a natural rubber.

Wooden body according to at least one of claims 1 to 5, characterized in that it is present as a wooden plate, wood body with a layer structure, molded part of pressed wood chips, rod and / or rod.

Wooden body according to at least one of claims 1 to 6, characterized in that it has to adjust desired properties, in particular for improving the weather resistance, surface coatings, optionally paints.

8. Use of the Hoizkörpers according to at least one of the preceding claims in buildings, facilities and equipment of apartments and vehicles on land and water.

9. Use according to claim 8 in windows, doors, trusses, laths, fences, roofing, pergola / karbholz / pavilions, slats, support elements of all kinds, in particular signs or static task, bridge parts, bars and moorings on the water, for restorations of damp Floors, floor coverings, furniture, including garden furniture and park benches, handrails, work plans, bed slats, design light switches, door handle sets and fittings, vehicles, boat building, caravans, trailers, pushcars, car seats, child seats and anti-vibration mounts.

10. A process for producing a wooden body according to at least one of claims 1 to 7, characterized in that the optionally predried and / or preheated Hotzkörper with a rubber-latex or a colloidal rubber dispersion, in particular an aqueous dispersion of vulcanizable rubber, optionally at elevated temperature, applied or impregnated, and then dried.

11. The method according to claim 10, characterized in that the impregnation, impingement or impregnation is carried out until a saturation state has set.

12. The method according to claim 10 or 11, characterized in that a to a temperature of about 30 ° C to about 100 ° C, in particular 70 ° C to 90 ° C, preheated wooden body is impregnated, optionally with a preheated rubber latex.

13. The method according to claim 12, characterized in that the rubber latex is adjusted to a temperature of about more than 30 ° C.

14. The method according to at least one of claims 10 to 13, characterized in that the rubber latex contains additives to adjust desired properties, in particular in the form of pigments, dyes, fillers, especially carbon black, plasticizers, UV stabilizers, antioxidants and / or environmental protection.

15. The method according to at least one of claims 10 to 14, characterized in that the plate-shaped wood body produced according to the method are pressed under heat and pressure to form a laminar Verbundgebiide.

16. The method according to at least one of claims 10 to 14, characterized in that kieinstückige Holzteiie be pressed or deformed to a larger Hoizkörper.