Akzo Nobel N.v.

Akzo Nobel Coatings International B.v.

Salme Pirhonen

Ingvar Lindh

Benyahia Nasli-Bakir

Robin Ljungar

Anna Kristina Furberg

Eugeniusz Abram

Jenny Adrian Meredith

The invention concerns an adhesive system comprising (a) a resin component comprising a urea based amino resin having an F/NHratio from 0.3 to 0.65; (b) a hardener component comprising at least one acid, acid generating salt or acidic salt; and, (c) an aqueous polymer dispersion; wherein the adhesive system comprises no or less than 0.9 wt % of urea, based on the weight of the entire adhesive system, in addition to any urea present in the urea based amino resin. The invention further concerns a method of producing a wood based product, wood based products obtainable thereby and use of the adhesive system.

Adhesive system

The present invention relates to a method of gluing wood based materials by providing an adhesive system onto wood based materials followed by curing, the adhesive system comprises a melaminic amino resin and a phenolic resin composition, wherein the phenolic resin composition comprises an acid and a phenolic resin. The invention also relates to an adhesive system and a stable phenolic resin composition as well as wood based products obtained by the method or through the use of the adhesive system.

Gluing wood based materials with melaminic amino resin and resorcinol or tannin resin

Method of gluing wood based materials

A method of producing formaldehyde laden layered products, the products having reduced emission of formaldehyde, of at least 2 layers, at least one of the layers being a veneer, comprising a step of treating at least one of the surfaces of said veneer, prior to bonding the layers together, with a solution comprising an ammonium salt. The invention also relates to a flooring material obtained by the method.

Method of producing formaldehyde laden layered products having reduced emission of formaldehyde

A method of producing formaldehyde laden layered products, the products having reduced emission of formaldehyde, of at least 2 layers, at least one of the layers being a board or veneer, comprising a step of treating at least one of the surfaces of said board or veneer, prior to bonding the layers together, with a solution comprising an inorganic sulphur containing salt. The invention also relates to a flooring material obtained by the method.

The present invention relates to a method of gluing wood based materials by providing an adhesive system onto wood based materials followed by curing, the adhesive system comprises a urea based amino resin and a hardener composition, wherein the hardener composition comprises an acid and a phenolic resin. The invention also relates to an adhesive system and a hardener composition as well as wood based products obtained by the method or through the use of the adhesive system.

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Sollentuna, Sweden

Salme Pirhonen