Basf Aktiengesellschaft

Otto Wittmann

Hans Diem

Guenther Matthias

Wolfgang Eisele

Harro Petersen

Friedrich Kraus

Johann Mayer

Jakob Decher

Hermann Schatz

Wolfgang Reuther

Matthias Marx

Manfred Niessner

Heinrich Horacek

Christof Jaeckh

Gerd Busse

Adolph Segnitz

Walter Pitteroff

Hans Etling

Edgar Haeussler

Heinz Lehnert

Robert Fritsch

Bruno Maurer

Walter Pfalzgraf

Uwe Kirchgaessner

Heat-curable, aqueous synthetic resin mixtures for coating woodworking materials, based on etherified melamine/formaldehyde condensates and aqueous synthetic resin dispersions, a process for the preparation of these mixtures and their use for coating woodworking materials.

Heat-curable, aqueous synthetic resin mixtures for coating woodworking

An aqueous resin solution for the impregnation of paper webs contains 2-40 parts by weight of a polyurea composed of urea and of a polyamine per 100 parts by weight of a melamine/formaldehyde precondensate. The impregnated paper webs are suitable for coating woodbase materials, especially chipboard.

Resin solution for the impregnation of paper webs

Amino resin solutions having an electrical conductivity of &lt;100 .mu.S/cm for impregnating paper are obtainable by

Amino resin solutions having low electrical conductivity

In the proposed pulverulent aminoplast adhesive resin for wood-base materials having a low formaldehyde emission, the resin is a mixture of

Pulverulent aminoplast adhesive resin for wood-base materials having a

In a proposed aminoplast adhesive resin powder for wood-based materials, which eliminates little formaldehyde, the resin is a mixture of

Aminoplast adhesive resin powder for wood-based materials or as a paper

A process for bonding lignocellulose raw materials using an isocyanate group-containing urethane-modified diphenylmethane diisocyanate mixture having a viscosity of 120 to 1000 mPas at 25.degree. C. and an isocyanate content of 15 to 33.6 percent by weight which is obtained by reacting a diphenylmethane diisocyanate mixture containing 10 to 75 percent by weight of 2,4'-diphenylmethane diisocyanate with 0.05 to 0.5 hydroxyl equivalents of a polyol per equivalent isocyanate group.

Process for bonding lignocellulose-containing raw materials with a

An aqueous solution of a resin glue comprising formaldehyde, urea, melamine and phenol is obtained when phenol, formaldehyde and not more than 0.35 mole of an alkali metal bisulfite per mole of phenol are reacted to give a phenol-formaldehyde condensate, formaldehyde and urea in a molar ratio of not more than 2.5 are reacted to give a urea-formaldehyde condensate, and the reaction products are in turn reacted with melamine and formaldehyde.

Preparation of cocondensates which produce weather-resistant bonding

Aqueous polyisocyanate emulsions are prepared by employing water-soluble polyamides as emulsification agents.

Aqueous isocyanate emulsions prepared with polyglycol and polymerized

Condensates containing urea and formaldehyde in a molar ratio of from 1:2.5 to 1:4.5 are converted into wood glue by allowing the viscosity to increase at a pH of from 1 to 3 and at only slightly elevated temperature and then adding urea at a pH of 7 to 9.

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Frankenthal, Germany

Otto Wittmann