Multi-layered lignocellulosic molded bodies with low formaldehyde emissions

Multi-layered lignocellulosic molded bodies with low formaldehyde emissions

  • CN 102,186,667 A
  • Filed: 09/09/2009
  • Published: 09/14/2011
  • Est. Priority Date: 09/19/2008
  • Status: Active Application
First Claim
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1. multilayer lignocellulose-containing mechanograph that comprises as lower floor:

  • A) can by use a intermediate layer that comprises the lignocellulose-containing particle that adhesive (a) obtains or a plurality of intermediate layer andB) can be by the cover layer or a plurality of cover layer that comprise the lignocellulose-containing particle that uses adhesive (b) to obtain,Wherein adhesive (a) is selected from (a1) formaldehyde resin and the organic isocyanate that (a2) has at least two isocyanate groups;

    Adhesive (b) comprises following component;

    The aqueous components (I) that comprises following component;

    (i) polymer A of forming by following monomer;

    A) at least a olefinic unsaturated monocarboxylic of 70-100 weight % and/or dicarboxylic acids (monomer A

         1) andB) at least a other ethylenically unsaturated monomer (monomer A

         2) that is different from monomer A 1 of 0-30 weight %,With optional(ii) have at least two and be selected from hydroxyl, carboxyl and derivative thereof, primary, the second month in a season and tertiary amine, epoxide group, the low-molecular-weight crosslinking agent of the functional group of aldehyde,With optional component (II) as aqueous dispersion, it comprises one or more polymer M that is made up of following monomer;

    A) at least a ethylenically unsaturated monomer (monomer M

         1) that comprises at least one epoxide group and/or at least one hydroxy alkyl of 0-50 weight % andB) at least a other ethylenically unsaturated monomer (monomer M

         2) that is different from monomer M 1 of 50-100 weight %,With optional conventional additives as component (III),And comprise under the situation of formaldehyde resin at adhesive (a), adhesive (b) comprises formaldehyde scavenger.

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