Multilayer lignocellulose-containing moldings having low formaldehyde emission

    公开(公告)号:AU2011298919B2

    公开(公告)日:2014-02-20

    申请号:AU2011298919

    申请日:2011-08-29

    Applicant: BASF SE

    Abstract: A multilayer lignocellulose-containing molding comprising A) a middle layer or a plurality of middle layers comprising lignocellulose-containing particles which is/are obtainable by using a binder (a) and B) a covering layer or a plurality of covering layers comprising lignocellulose-containing particles which is/are obtainable by using a binder (b), the binder (a) being selected from the group consisting of (a1) formaldehyde resins and (a2) an organic isocyanate having at least two isocyanate groups; the binder (b) comprising the following components: an aqueous component (I) comprising (i) a polymer A which is composed of the following monomers: a) from 70 to 100% by weight of at least one ethylenically unsaturated mono- and/or dicarboxylic acid (monomer(s) A1) and b) from 0 to 30% by weight of at least one further ethylenically unsaturated monomer which differs from the monomers A1 (monomer(s) A2) optionally (ii) a low molecular weight crosslinking agent having at least two functional groups which are selected from the group consisting of hydroxyl, carboxyl and derivatives thereof, primary, secondary and tertiary amine, epoxy, aldehyde, an organic isocyanate having at least two isocyanate groups as component (II) and, optionally, a component (III), as an aqueous dispersion, comprising one or more polymer(s) M which is/are composed of the following monomers: a) from 0 to 50% by weight of at least one ethylenically unsaturated monomer which comprises at least one epoxide and/or at least one hydroxyalkyl group (monomer(s) M1) and b) from 50 to 100% by weight of at least one further ethylenically unsaturated monomer which differs from the monomers M1 (monomer(s) M2) and, optionally, customary additives as component (IV), and the binder (b) optionally comprises a formaldehyde scavenger.

    MULTILAYER LIGNOCELLULOSE-CONTAINING MOLDINGS HAVING LOW FORMALDEHYDE EMISSION

    公开(公告)号:CA2821159A1

    公开(公告)日:2012-06-21

    申请号:CA2821159

    申请日:2011-12-14

    Applicant: BASF SE

    Abstract: The invention relates to a multi-layer molded body that contains lignocellulose, comprising A) a middle layer or a plurality of middle layers, which contain(s) particles that contain lignocellulose and which can be obtained by using a binder (a), and B) an outer layer or a plurality of outer layers, which contain(s) particles that contain lignocellulose and which can be obtained by using a binder (b), wherein the binder (a) is selected from the group comprising (a1) formaldehyde resins and (a2) an organic isocyanate having at least two isocyanate groups; wherein the binder (b) contains the following components: an aqueous component (I) containing (i) a polymer A, which is constructed from the following monomers: a) 70 to 100 wt % of at least one ethylenically unsaturated monocarboxylic acid and/or dicarboxylic acid (monomer(s) A1) and b) 0 to 30 wt % of at least one additional ethylenically unsaturated monomer that differs from the monomers A1 (monomer(s) A2), possibly (ii) a low-molecular-weight cross-linking agent having at least two functional groups, which are selected from the group comprising hydroxy, carboxylic acid and derivatives thereof, primary, secondary, and tertiary amine, epoxy, and aldehyde, an organic isocyanate having at least two isocyanate groups as component (II), and possibly a component (III) as an aqueous dispersion containing one or more polymers M, which are constructed from the following monomers: a) 0 to 50 wt % of at least one ethylenically unsaturated monomer that contains at least one epoxide group and/or at least one hydroxyalkyl group (monomer(s) M1), and b) 50 to 100 wt % of at least one additional ethylenically unsaturated monomer that differs from the monomers M1 (monomer(s) M2), and possibly common additives as component (IV), and wherein at least one middle layer (A) contains expanded plastic particles and possibly at least one outer layer B) contains expanded plastic particles, and the binder (b) possibly contains a formaldehyde scavenger.

    Light wood-based materials
    38.
    发明专利

    公开(公告)号:AU2007312220B2

    公开(公告)日:2012-05-03

    申请号:AU2007312220

    申请日:2007-10-18

    Applicant: BASF SE

    Abstract: The invention relates to a light material containing wood having an average density in the region of between 200 to 600 kg/m, and which comprises, in relation to the material containing wood, A) 30 to 95% by wt. of wood particles, B) 1 to 25% by wt. of a filling material having a bulk density in the region of between 10 to 150 kg/m, selected from the group consisting of foamable plastic particles and already foamed plastic particles, C) 0.1 to 50% by wt. of a binding agent, and optionally, D) additives. Said claimed material containing wood is characterised by the following relation between the d' values in accordance with the Rosin-Rammler-Sperling-Bennet distribution of the wood particles (A) and the particles of the filling material (B): d' of the particles (A) ≤2,5 Œ d' of the particles (B).

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