EP1914052B1 - Leichte Holzwerkstoffe - Google Patents

Leichte Holzwerkstoffe Download PDF

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Publication number
EP1914052B1
EP1914052B1 EP06122557.9A EP06122557A EP1914052B1 EP 1914052 B1 EP1914052 B1 EP 1914052B1 EP 06122557 A EP06122557 A EP 06122557A EP 1914052 B1 EP1914052 B1 EP 1914052B1
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EP
European Patent Office
Prior art keywords
wood
base material
filler
density
weight
Prior art date
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Active
Application number
EP06122557.9A
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German (de)
English (en)
French (fr)
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EP1914052A1 (de
Inventor
Lionel Gehringer
Stephan WEINKÖTZ
Günter Scherr
Frank Braun
Maxim Peretolchin
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BASF SE
Original Assignee
BASF SE
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Application filed by BASF SE filed Critical BASF SE
Priority to DE200620020503 priority Critical patent/DE202006020503U1/de
Priority to EP06122557.9A priority patent/EP1914052B1/de
Priority to PT61225579T priority patent/PT1914052T/pt
Priority to PL06122557T priority patent/PL1914052T3/pl
Priority to ES06122557.9T priority patent/ES2641263T3/es
Priority to CA 2666454 priority patent/CA2666454A1/en
Priority to MYPI20091588A priority patent/MY148871A/en
Priority to JP2009532809A priority patent/JP5150638B2/ja
Priority to US12/446,245 priority patent/US8304069B2/en
Priority to UAA200904962A priority patent/UA94123C2/ru
Priority to EA200900551A priority patent/EA013666B1/ru
Priority to CA 2666447 priority patent/CA2666447A1/en
Priority to AU2007312220A priority patent/AU2007312220B2/en
Priority to CN2007800428544A priority patent/CN101553348B/zh
Priority to US12/446,248 priority patent/US9089991B2/en
Priority to BRPI0717436-5A2A priority patent/BRPI0717436A2/pt
Priority to NZ576323A priority patent/NZ576323A/en
Priority to PL07821530T priority patent/PL2083974T3/pl
Priority to AU2007312218A priority patent/AU2007312218B2/en
Priority to EP20110152229 priority patent/EP2319670A1/de
Priority to PCT/EP2007/061167 priority patent/WO2008046892A2/de
Priority to PT78215308T priority patent/PT2083974T/pt
Priority to JP2009532808A priority patent/JP5300728B2/ja
Priority to DE200750006137 priority patent/DE502007006137D1/de
Priority to AT07821531T priority patent/ATE493247T1/de
Priority to EA200900550A priority patent/EA013665B1/ru
Priority to PT07821531T priority patent/PT2083975E/pt
Priority to MYPI20091585A priority patent/MY148865A/en
Priority to UAA200904960A priority patent/UA96612C2/ru
Priority to CN200780042908.7A priority patent/CN101541488B/zh
Priority to ES07821530.8T priority patent/ES2622883T3/es
Priority to PL07821531T priority patent/PL2083975T3/pl
Priority to NZ576290A priority patent/NZ576290A/en
Priority to ES07821531T priority patent/ES2357574T3/es
Priority to EP07821532A priority patent/EP2083976A2/de
Priority to PCT/EP2007/061165 priority patent/WO2008046890A2/de
Priority to EP20070821531 priority patent/EP2083975B1/de
Priority to EP07821530.8A priority patent/EP2083974B1/de
Priority to PCT/EP2007/061166 priority patent/WO2008046891A1/de
Priority to BRPI0717434-9A2A priority patent/BRPI0717434A2/pt
Publication of EP1914052A1 publication Critical patent/EP1914052A1/de
Priority to NO20091516A priority patent/NO20091516L/no
Priority to NO20091522A priority patent/NO20091522L/no
Priority to NO20091523A priority patent/NO20091523L/no
Application granted granted Critical
Publication of EP1914052B1 publication Critical patent/EP1914052B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/005—Manufacture of substantially flat articles, e.g. boards, from particles or fibres and foam
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
    • Y10T428/249971—Preformed hollow element-containing
    • Y10T428/249972—Resin or rubber element
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/253—Cellulosic [e.g., wood, paper, cork, rayon, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/254—Polymeric or resinous material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
    • Y10T428/2991—Coated
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/3188—Next to cellulosic
    • Y10T428/31895—Paper or wood
    • Y10T428/31899—Addition polymer of hydrocarbon[s] only
    • Y10T428/31902—Monoethylenically unsaturated
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31971—Of carbohydrate
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31971—Of carbohydrate
    • Y10T428/31975—Of cellulosic next to another carbohydrate
    • Y10T428/31978—Cellulosic next to another cellulosic
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31971—Of carbohydrate
    • Y10T428/31975—Of cellulosic next to another carbohydrate
    • Y10T428/31978—Cellulosic next to another cellulosic
    • Y10T428/31982—Wood or paper
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31971—Of carbohydrate
    • Y10T428/31989—Of wood

Definitions

  • the present invention relates to light wood materials containing 30 to 92.5 wt .-%, based on the wood material, wood particles, wherein the wood particles have a mean density of 0.4 to 0.85 g / cm 3 , 2.5 to 20 wt .-%, based on the wood material, polystyrene and / or styrene copolymer as filler, wherein the filler has a bulk density of 30 to 100 kg / m 3 , and 5 to 50 wt .-%, based on the wood material, binder, wherein the average density of the light wood material is less than or equal to 600 kg / m 3 .
  • Wood-based panels are a cost-effective and resource-saving alternative to solid wood and have gained great importance in particular in furniture construction, laminate flooring and as building materials.
  • Starting materials serve wood particles of different strengths, eg. As wood chips or wood fibers from different woods.
  • wood particles are usually pressed with natural and / or synthetic binders and optionally with the addition of further additives to plate or strand-shaped wood materials.
  • chipboard comes mainly used in the manufacture of doors as an inner layer.
  • a disadvantage of these materials is the too low screw extraction resistance, the difficulty attaching fittings and the difficulties in edging.
  • a light wood material according to the preamble of claim 1 is disclosed, in particular lightweight and pressure-resistant molding materials are described, which consist of wood chips or fibers, a binder and serving as a filler porous plastic.
  • the wood chips or fibers are mixed with binders and foamable or partially foamable plastics, and the resulting mixture is compressed at elevated temperature.
  • binders all conventional binders suitable for the gluing of wood, such as urea-formaldehyde resins, are useful.
  • Suitable fillers are foamable or already foamed plastic particles, preferably expandable thermoplastics such as styrene polymers.
  • the particle size of the plastics used is generally in prefoamed plastics 0.6 to 10 mm.
  • the plastics are used in an amount of 0.5 to 5 weight percent, based on the wood chips.
  • the plates described in the examples have a thickness of 18 to 21 mm, a density of 220 kg / m 3 to 430 kg / m 3 and an average bending strength of 3.6 N / mm 2 to 17.7 N / mm 2 on.
  • the transverse tensile strengths are not specified in the examples.
  • WO 02/38676 describes a process for the preparation of light products, in which 5 to 40 wt .-% foamable or already foamed polystyrene having a particle size of less than 1 mm, 60 to 95 wt .-% lignocellulosic material and binder mixed and at elevated temperature and elevated pressure be pressed into the finished product, wherein the polystyrene melts and on the one hand impregnates the lignocellulosic material and on the other hand by the migration to the surface of the product forms a hard, water-resistant skin.
  • urea-formaldehyde resin or melamine-formaldehyde resin may be used as the binder.
  • the example describes a product with a thickness of 4.5 mm and a density of 1200 kg / m 3 .
  • US 2005/0019548 describes lightweight OSB boards using low density fillers.
  • binder polymeric binders such as 4,4-diphenylmethane diisocyanate resin are described.
  • the fillers described are glass, ceramics, perlite or polymeric materials.
  • the polymeric material is used in an amount of 0.8 to 20 wt .-% based on the OSB board.
  • the polymeric material used in the examples is the material Dualite, which consists of polypropylene, polyvinylidene chloride or polyacrylonitrile. A weight reduction of 5% is described.
  • OSB boards having a density of 607 to 677 kg / m 3 and a transverse tensile strength of 0.31 to 0.59 N / mm 2 are described.
  • US 2003/24443 discloses a material consisting of wood chips, binders and fillers. Fillers include polymers based on styrene. The volume ratio between the wood chips and the binder is advantageously 1: 1. There are also described prior art plates in which the volume ratio of binder to wood shavings is 90:10. These prior art plates have a density of 948 kg / m 3 . As binders among other thermosetting resins are described. In the examples according to the invention plates with a volume ratio of binder to wood chips of 45:55 are described which have a density of 887 kg / m 3 .
  • JP 06031708 describes light wood materials, wherein for the middle layer of a three-layer chipboard, a mixture of 100 parts by weight of wood particles and 5 to 30 parts by weight of particles of synthetic resin foam are used, said resin particles having a specific gravity of not more than 0.3 g / cm 3 and have a compressive strength of at least 30 kg / cm 2 . Further, it is described that the specific gravity of the wood particles should not exceed 0.5 g / cm 3 .
  • a mechanical strength of the produced wood materials of 4.7 to 4.9 kg / cm 3 is achieved using wood particles from the Japanese cedar with a density of 0.35 g / cm 3 . Using Lauan and Kapur wood particles with an average density of 0.6 g / cm 3 , only a mechanical strength of the produced wood materials of 3.7 kg / cm 3 could be achieved.
  • the disadvantage of the prior art is summarized in that on the one hand, the described light (wood) materials for furniture manufacturing too low mechanical strength, such as too low a screw pull-out resistance, have. On the other hand, the wood materials described in the prior art still have a high density of over 600 kg / m 3 . Furthermore, in the prior art for the production of lightweight wood-based materials, woods with an unusually light density of less than 0.5 g / cm 3 are employed for the European market.
  • Too low mechanical strength for example, lead to breaking or cracking of the components. Furthermore, these components tend during drilling or sawing to additional flaking of further wood material. Fastening hardware is difficult with these materials.
  • the object of the present invention was therefore to show light wood materials, which in comparison to the commercial wood materials by 5 bis 40% lower density with the same good mechanical strength.
  • the mechanical strength can be determined, for example, by measuring the transverse tensile strength.
  • these lightweight wood-based materials should be manufacturable using native, European woods. Consequently, the lightweight wood-based materials using heavy woods should have comparable low densities and comparable high mechanical strengths as the wood-based materials according to JP 06031708 made using light woods. Furthermore, the swelling and water absorption of the light wood materials should not be affected by the reduced density.
  • the object was achieved by the features of claim 1.
  • the weight of the binder refers to the solids content of the binder.
  • the average density of the wood particles refers to a wood moisture content of 12%.
  • the average density of the wood particles refers to an average density over all wood particles used.
  • the wood-base materials according to the invention have an average density of 200 to 600 kg / m 3 , preferably 200 to 575 kg / m 3 , particularly preferably 250 to 550 kg / m 3 , in particular 300 to 500 kg / m 3 .
  • the transverse tensile strength of the wood-base materials according to the invention is greater than 0.4 N / mm 2 , more preferably greater than 0.5 and in particular greater than 0.6 N / mm 2 .
  • the determination of the transverse tensile strength is in accordance with EN 319.
  • Wood-based materials are all materials which are made of wood veneers with an average density of 0.4 to 0.85 g / cm 3 , such as veneer sheets or plywood sheets, of wood chips with a mean density of 0.4 to 0.85 g / cm 3 produced wood materials, such as chipboard or OSB boards, and wood fiber materials such as LDF, MDF and HDF boards. Particleboard and fiberboard, in particular chipboard, are preferred.
  • the average density of the wood particles is advantageously 0.4 to 0.8 g / cm 3 , preferably 0.4 to 0.75 g / cm 3 , in particular 0.4 to 0.6 g / cm 3 .
  • spruce for example, spruce, beech, pine, larch or fir wood is used, preferably spruce and / or beech wood, in particular spruce wood.
  • the filler polystyrene and / or styrene copolymer can be prepared by all polymerization processes known to those skilled in the art [see, for example, US Pat. B. Ullmann's Encyclopedia, Sixth Edition, 2000 Electronic Release ]. For example, the preparation is carried out in a conventional manner by suspension polymerization or by extrusion.
  • styrene In the suspension polymerization, styrene, optionally with the addition of further comonomers in aqueous suspension, is polymerized in the presence of a customary suspension stabilizer by means of free-radical-forming catalysts.
  • the blowing agent and, if appropriate, further additives may be introduced during the polymerization or may be added to the batch in the course of the polymerization or after the end of the polymerization.
  • the resulting bead-shaped optionally expandable styrene polymers are separated from the aqueous phase after the end of the polymerization, washed, dried and sieved.
  • the blowing agent is mixed for example via an extruder in the polymer, conveyed through a nozzle plate and granulated into particles or strands.
  • the filler polystyrene or styrene copolymer is particularly preferably expandable.
  • blowing agents are all blowing agents known to those skilled in the art, for example C 3 to C 6 hydrocarbons, such as propane, n-butane, isobutane, n-pentane, isopentane, neopentane and / or hexane, alcohols, ketones, ethers or halogenated hydrocarbons , Preferably, a commercially available pentane isomer mixture is used.
  • the styrenic polymers may contain additives, nucleating agents, plasticizers, flame retardants, soluble and insoluble inorganic and / or organic dyes and pigments, e.g. IR absorber, such as carbon black, graphite or aluminum powder, are added together or spatially separated as additives.
  • additives e.g. IR absorber, such as carbon black, graphite or aluminum powder, are added together or spatially separated as additives.
  • styrene copolymers these styrene copolymers advantageously have at least 50% by weight, preferably at least 80% by weight, of copolymerized polystyrene.
  • comonomers come z. B. ⁇ -methylstyrene, ring-halogenated styrenes, acrylonitrile, esters of acrylic or methacrylic acid of Alcohols having 1 to 8 carbon atoms, N-vinylcarbazole, maleic acid (anhydride), (meth) acrylamides and / or vinyl acetate into consideration.
  • the polystyrene and / or styrene copolymer may contain in copolymerized form a small amount of a chain splitter, i. a compound having more than one, preferably two, double bonds, such as divinylbenzene, butadiene and / or butanediol diacrylate.
  • the branching agent is generally used in amounts of from 0.005 to 0.05 mol%, based on styrene.
  • styrene (co) polymers having molecular weights and molecular weight distributions as described in US Pat EP-B 106 129 and in DE-A 39 21 148 are described. Preference is given to using styrene (co) polymers having a molecular weight in the range from 190,000 to 400,000 g / mol.
  • Mixtures of different styrene (co) polymers can also be used.
  • styrene polymers to glassy polystyrene (GPPS), toughened polystyrene (HIPS), anionically polymerized polystyrene or toughened polystyrene (A-IPS), styrene- ⁇ -methylstyrene copolymers, acrylonitrile-butadiene-styrene polymers (ABS), styrene-acrylonitrile (SAN), Acrylonitrile-styrene-acrylic ester (ASA), methyl acrylate-butadiene-styrene (MBS), methyl methacrylate-acrylonitrile-butadiene-styrene (MABS) polymers or mixtures thereof or used with polyphenylene ether (PPE).
  • GPPS glassy polystyrene
  • HIPS toughened polystyrene
  • A-IPS anionically polymerized polystyrene or toughened polystyrene
  • polystyrene Styropor®, Neopor® and / or Peripor® from BASF Aktiengesellschaft is particularly preferably used.
  • Pre-expanded polystyrene and / or styrene copolymers are advantageously used.
  • the prefoamed polystyrene can be prepared by all methods known to the person skilled in the art (for example DE 845264 ).
  • the expandable styrene polymers are expanded in a known manner by heating to temperatures above their softening point, for example with hot air or preferably steam.
  • the prefoamed polystyrene or styrene copolymer is used in the form of spheres or beads having an average diameter of advantageously 0.25 to 10 mm, preferably 0.5 to 5 mm, in particular 0.75 to 3 mm.
  • the prefoamed polystyrene or styrene copolymer spheres advantageously have a small surface area per volume, for example in the form of a spherical or elliptical particle.
  • the prefoamed polystyrene or styrene copolymer spheres are advantageously closed-celled.
  • the open cell density according to DIN-ISO 4590 is less than 30%.
  • antistatic agents the usual and common in the art substances can be used. Examples are N, N-bis (2-hydroxyethyl) -C 12 -C 18 -alkylamines, fatty acid diethanolamides, choline ester chlorides of fatty acids, C 12 -C 20 -alkyl sulfonates, ammonium salts.
  • Suitable ammonium salts contain on nitrogen in addition to alkyl groups 1 to 3 hydroxyl-containing organic radicals.
  • Suitable quaternary ammonium salts are, for example, those having on the nitrogen cation 1 to 3, preferably 2, identical or different alkyl radicals having 1 to 12, preferably 1 to 10 carbon atoms, and 1 to 3, preferably 2 identical or different hydroxyalkyl or hydroxyalkylpolyoxyalkylene Radicals bound with any anion, such as chloride, bromide, acetate, methyl sulfate or p-toluenesulfonate.
  • hydroxyalkyl and hydroxyalkyl-polyoxyalkylene radicals are those which are formed by oxyalkylation of a nitrogen-bonded hydrogen atom and are derived from 1 to 10 oxyalkylene radicals, in particular oxyethylene and oxypropylene radicals.
  • An antistatic agent which is particularly preferred is a quaternary ammonium salt or an alkali metal salt, in particular the sodium salt of a C 12 -C 20 alkanesulfonate, eg. B emulsifier K30 from Bayer AG, or mixtures thereof.
  • the antistatic agents can generally be added both as a pure substance and in the form of an aqueous solution.
  • the antistatic agent can be added in the process for the preparation of polystyrene or styrene copolymer analogously to the customary additives or applied after the preparation of the polystyrene particles as a coating.
  • the antistatic agent is advantageously used in an amount of 0.05 to 6 wt .-%, preferably 0.1 to 4 wt .-%, based on the polystyrene or styrene copolymer.
  • the filler polystyrene and / or styrene copolymer is advantageously present evenly distributed in the wood material according to the invention.
  • the filler balls are advantageously present after pressing to the wood material in an unmelted state. Optionally, however, it may come to a melting of the filler balls, which are located on the surface of the wood material.
  • binders it is possible to use all binders known to the person skilled in the art for the production of wood-based materials.
  • Formaldehyde-containing adhesives are advantageously used as binders, for example urea-formaldehyde resins or melamine-containing urea-formaldehyde resins. Preference is given to using urea-formaldehyde resins.
  • Kaurit® glue from BASF Aktiengesellschaft is used as the binder.
  • the solids content of the binder is usually from 25 to 100% by weight, in particular from 50 to 70% by weight.
  • the lightweight wood-base materials according to the invention advantageously contain 55 to 92.5% by weight, preferably 60 to 90% by weight, in particular 70 to 85% by weight, based on the wood material, of wood particles, the wood particles having an average density of 0, 4 to 0.85 g / cm 3 , preferably 0.4 to 0.75 g / cm 3 , in particular 0.4 to 0.6 g / cm 3 , preferably 5 to 15 wt .-%, preferably 8 to 12 Wt .-% based on the wood material, polystyrene and / or styrene copolymer filler, wherein the filler has a bulk density of 30 to 100 kg / m 3 , and preferably 5 to 25 wt .-%, in particular 5 to 15 wt .-% , based on the wood material, binder, wherein the average density of the light wood material is less than or equal to 600 kg / m 3 , preferably less than or equal to 575 kg / m
  • the thickness of the wood materials varies with the field of application and is usually in the range of 0.5 to 50 mm.
  • the transverse tensile strength of the lightweight wood-base materials according to the invention having a density of 200 to 650 kg / m 3 is advantageously greater than (0.002 ⁇ D - 0.55) N / mm 2 , preferably greater than (0.002 ⁇ D - 0.45) N / mm 2 , in particular greater than (0.0022 x D - 0.45) N / mm 2 .
  • the swelling values are advantageously 10% smaller, preferably 20% smaller, in particular 30% smaller than the swelling values of a plate of the same density without filler.
  • the present invention relates to a process for the production of lightweight wood-based materials, as defined in claim 1.
  • the wood particle cake is cold pre-sealed before pressing.
  • the pressing can be carried out by all methods known to the person skilled in the art.
  • the wood particle cake is pressed at a press temperature of 150 ° C to 230 ° C to the desired thickness.
  • the pressing time is normally 3 to 15 seconds per mm plate thickness.
  • the present invention relates to the use of the wood-based materials according to the invention for the production of furniture, of packaging materials, in house building or interior work.
  • the advantages of the present invention are the low density of the wood-based materials according to the invention with good mechanical stability. Furthermore, the inventive easily produce wood-based materials; There is no need to retrofit the existing plants for the production of wood-based materials according to the invention.
  • Foamable polystyrene was such.
  • EP 981 574 described prepared. The addition of an antistatic agent during or after production was omitted.
  • the polystyrene particles obtained according to Example A1 were treated with steam in a continuous prefoamer.
  • the bulk density of the prefoamed polystyrene beads was adjusted by varying the vapor pressure and the steaming time.
  • Extruded PS foam available from BASF as Styrodur® (bulk density about 30 kg / m 3 ) was ground in a Pallmann impact mill type PP to an average particle diameter of 0.2 to 2 mm.
  • the glued chips or fibers were cold precompressed in a 30x30 cm mold. It was then pressed in a hot press (pressing temperature 190 ° C, pressing time 210 s). The nominal thickness of the plate was 16 mm in each case.
  • the density was determined 24 hours after preparation according to EN 1058.
  • the determination of the transverse tensile strength is in accordance with EN 319.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Laminated Bodies (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Porous Artificial Stone Or Porous Ceramic Products (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
EP06122557.9A 2006-10-19 2006-10-19 Leichte Holzwerkstoffe Active EP1914052B1 (de)

Priority Applications (43)

Application Number Priority Date Filing Date Title
DE200620020503 DE202006020503U1 (de) 2006-10-19 2006-10-19 Leichte Holzwerkstoffe
EP06122557.9A EP1914052B1 (de) 2006-10-19 2006-10-19 Leichte Holzwerkstoffe
PT61225579T PT1914052T (pt) 2006-10-19 2006-10-19 Materiais leves à base de madeira
PL06122557T PL1914052T3 (pl) 2006-10-19 2006-10-19 Lekkie tworzywa drzewne
ES06122557.9T ES2641263T3 (es) 2006-10-19 2006-10-19 Materiales ligeros a base de madera
CA 2666454 CA2666454A1 (en) 2006-10-19 2007-10-18 Light wood-base materials
MYPI20091588A MY148871A (en) 2006-10-19 2007-10-18 Light wood-based materials
JP2009532809A JP5150638B2 (ja) 2006-10-19 2007-10-18 良好な機械的特性を有する軽量の木材材料
US12/446,245 US8304069B2 (en) 2006-10-19 2007-10-18 Light wood-based materials
UAA200904962A UA94123C2 (ru) 2006-10-19 2007-10-18 Легкий древесный материал, способ его получения и многослойный материал
EA200900551A EA013666B1 (ru) 2006-10-19 2007-10-18 Легкие древесно-стружечные материалы
CA 2666447 CA2666447A1 (en) 2006-10-19 2007-10-18 Light wood-base materials having good mechanical properties
AU2007312220A AU2007312220B2 (en) 2006-10-19 2007-10-18 Light wood-based materials
CN2007800428544A CN101553348B (zh) 2006-10-19 2007-10-18 轻木基材料及其生产方法和用途
US12/446,248 US9089991B2 (en) 2006-10-19 2007-10-18 Light wood-based materials
BRPI0717436-5A2A BRPI0717436A2 (pt) 2006-10-19 2007-10-18 Material à base de madeira leve, material compósito, processo para a produção de materiais à base de madeira leve, e, uso dos materiais à base de madeira
NZ576323A NZ576323A (en) 2006-10-19 2007-10-18 Light wood-based materials
PL07821530T PL2083974T3 (pl) 2006-10-19 2007-10-18 Lekkie tworzywa drzewne
AU2007312218A AU2007312218B2 (en) 2006-10-19 2007-10-18 Light wood-based materials
EP20110152229 EP2319670A1 (de) 2006-10-19 2007-10-18 Leichte Holzwerkstoffe
PCT/EP2007/061167 WO2008046892A2 (de) 2006-10-19 2007-10-18 Leichte holzwerkstoffe
PT78215308T PT2083974T (pt) 2006-10-19 2007-10-18 Derivados de madeira leves
JP2009532808A JP5300728B2 (ja) 2006-10-19 2007-10-18 軽量の木材材料
DE200750006137 DE502007006137D1 (de) 2006-10-19 2007-10-18 Leichte holzwerkstoffe mit guten mechanischen eigenschaften und verfahren zur herstellung der selben
AT07821531T ATE493247T1 (de) 2006-10-19 2007-10-18 Leichte holzwerkstoffe mit guten mechanischen eigenschaften und verfahren zur herstellung der selben
EA200900550A EA013665B1 (ru) 2006-10-19 2007-10-18 Легкие древесно-стружечные материалы
PT07821531T PT2083975E (pt) 2006-10-19 2007-10-18 Materiais leves de madeira com boas propriedades mecânicas
MYPI20091585A MY148865A (en) 2006-10-19 2007-10-18 Light wood-based materials
UAA200904960A UA96612C2 (ru) 2006-10-19 2007-10-18 Легкое древесное вещество, способ его получения, использования (варианты), многослойный древесный материал (варианты) и способ его получения и применения (варианты)
CN200780042908.7A CN101541488B (zh) 2006-10-19 2007-10-18 轻木基材料
ES07821530.8T ES2622883T3 (es) 2006-10-19 2007-10-18 Materiales livianos de madera
PL07821531T PL2083975T3 (pl) 2006-10-19 2007-10-18 Lekkie tworzywa drzewne o dobrych właściwościach mechanicznych i sposób ich wytwarzania
NZ576290A NZ576290A (en) 2006-10-19 2007-10-18 Light wood-based materials
ES07821531T ES2357574T3 (es) 2006-10-19 2007-10-18 Material ligero derivado de la madera, con buenas características mecánicas y el procedimiento para su obtención.
EP07821532A EP2083976A2 (de) 2006-10-19 2007-10-18 Leichte holzwerkstoffe
PCT/EP2007/061165 WO2008046890A2 (de) 2006-10-19 2007-10-18 Leichte holzwerkstoffe
EP20070821531 EP2083975B1 (de) 2006-10-19 2007-10-18 Leichte holzwerkstoffe mit guten mechanischen eigenschaften und verfahren zur herstellung der selben
EP07821530.8A EP2083974B1 (de) 2006-10-19 2007-10-18 Leichte holzwerkstoffe
PCT/EP2007/061166 WO2008046891A1 (de) 2006-10-19 2007-10-18 Leichte holzwerkstoffe mit guten mechanischen eigenschaften
BRPI0717434-9A2A BRPI0717434A2 (pt) 2006-10-19 2007-10-18 Material contendo madeira leve, material à base de madeira em múltiplas camadas, processos para a produção de materiais contendo madeira leve e de um material à base de madeira em múltiplas camadas, e, uso dos materiais contendo madeira leve.
NO20091516A NO20091516L (no) 2006-10-19 2009-04-17 Lette trematerialer med gode mekaniske egenskaper
NO20091522A NO20091522L (no) 2006-10-19 2009-04-17 Lette tre-baserte materialer
NO20091523A NO20091523L (no) 2006-10-19 2009-04-17 Lette tre-baserte materialer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06122557.9A EP1914052B1 (de) 2006-10-19 2006-10-19 Leichte Holzwerkstoffe

Publications (2)

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EP1914052A1 EP1914052A1 (de) 2008-04-23
EP1914052B1 true EP1914052B1 (de) 2017-06-28

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EP06122557.9A Active EP1914052B1 (de) 2006-10-19 2006-10-19 Leichte Holzwerkstoffe
EP20070821531 Active EP2083975B1 (de) 2006-10-19 2007-10-18 Leichte holzwerkstoffe mit guten mechanischen eigenschaften und verfahren zur herstellung der selben
EP07821530.8A Active EP2083974B1 (de) 2006-10-19 2007-10-18 Leichte holzwerkstoffe
EP07821532A Withdrawn EP2083976A2 (de) 2006-10-19 2007-10-18 Leichte holzwerkstoffe
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EP20070821531 Active EP2083975B1 (de) 2006-10-19 2007-10-18 Leichte holzwerkstoffe mit guten mechanischen eigenschaften und verfahren zur herstellung der selben
EP07821530.8A Active EP2083974B1 (de) 2006-10-19 2007-10-18 Leichte holzwerkstoffe
EP07821532A Withdrawn EP2083976A2 (de) 2006-10-19 2007-10-18 Leichte holzwerkstoffe
EP20110152229 Withdrawn EP2319670A1 (de) 2006-10-19 2007-10-18 Leichte Holzwerkstoffe

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US (2) US9089991B2 (pt)
EP (5) EP1914052B1 (pt)
JP (2) JP5300728B2 (pt)
CN (2) CN101541488B (pt)
AT (1) ATE493247T1 (pt)
AU (2) AU2007312218B2 (pt)
BR (2) BRPI0717434A2 (pt)
CA (2) CA2666454A1 (pt)
DE (2) DE202006020503U1 (pt)
EA (2) EA013665B1 (pt)
ES (3) ES2641263T3 (pt)
MY (2) MY148871A (pt)
NO (3) NO20091522L (pt)
NZ (2) NZ576323A (pt)
PL (3) PL1914052T3 (pt)
PT (3) PT1914052T (pt)
UA (2) UA94123C2 (pt)
WO (3) WO2008046892A2 (pt)

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BRPI0717434A2 (pt) 2013-11-12
ATE493247T1 (de) 2011-01-15
EA200900551A1 (ru) 2009-10-30
NZ576290A (en) 2012-02-24
EP2083975A1 (de) 2009-08-05
PT2083975E (pt) 2011-02-03
UA96612C2 (ru) 2011-11-25
AU2007312220B2 (en) 2012-05-03
WO2008046892A3 (de) 2008-08-21
CA2666454A1 (en) 2008-04-24
AU2007312220A1 (en) 2008-04-24
UA94123C2 (ru) 2011-04-11
ES2641263T3 (es) 2017-11-08
NO20091522L (no) 2009-05-18
WO2008046890A2 (de) 2008-04-24
EP2319670A1 (de) 2011-05-11
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WO2008046890A3 (de) 2008-06-12
PL2083974T3 (pl) 2017-07-31
CN101553348B (zh) 2013-08-14
AU2007312218B2 (en) 2012-02-09
EA013666B1 (ru) 2010-06-30
US9089991B2 (en) 2015-07-28
JP2010506757A (ja) 2010-03-04
CA2666447A1 (en) 2008-04-24
US20110003136A1 (en) 2011-01-06
NO20091516L (no) 2009-05-14
EA200900550A1 (ru) 2009-10-30
EP2083975B1 (de) 2010-12-29
PT1914052T (pt) 2017-10-04
PL2083975T3 (pl) 2011-05-31
CN101553348A (zh) 2009-10-07
ES2622883T3 (es) 2017-07-07
CN101541488A (zh) 2009-09-23
EP2083976A2 (de) 2009-08-05
EP2083974B1 (de) 2017-01-18
ES2357574T3 (es) 2011-04-27
DE502007006137D1 (de) 2011-02-10
NZ576323A (en) 2012-03-30
EA013665B1 (ru) 2010-06-30
JP5300728B2 (ja) 2013-09-25
US20100297425A1 (en) 2010-11-25
US8304069B2 (en) 2012-11-06
PL1914052T3 (pl) 2017-12-29
EP1914052A1 (de) 2008-04-23
CN101541488B (zh) 2014-01-15
DE202006020503U1 (de) 2008-10-09
PT2083974T (pt) 2017-03-31
AU2007312218A1 (en) 2008-04-24
MY148871A (en) 2013-06-14
JP2010506758A (ja) 2010-03-04
WO2008046892A2 (de) 2008-04-24
NO20091523L (no) 2009-04-30
BRPI0717436A2 (pt) 2013-11-12
MY148865A (en) 2013-06-14
JP5150638B2 (ja) 2013-02-20
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