Basf Aktiengesellschaft

Lothar Maempel

Karl Haeberle

Gerhard Bauer

Oral Aydin

Herbert Fisch

Ulrich Filges

Horst Seibert

Alexander Wallon

Eckehardt Wistuba

Gerhard Auchter

Otto Volkert

Rainer Hummerich

Peter Weyland

Erich Penzel

Michael Kerber

Karl-Clemens Peters

Hans-Joachim Fricke

Hans J Neumann

Ruediger Fuessl

Fritz Peikert

Aqueous dispersions containing a polyurethane which contains less than 0.6% by weight, based on the polyurethane, of urea groups ##STR1## are used as adhesives.

Use of aqueous polyurethane dispersions as adhesives for laminated films

Copolymers are composed of a) from 0.01 to 40% by weight of a copolymerized ethylenically unsaturated compound having at least one isocyanate group blocked with an oxime, b) from 30 to 99.99% by weight of at least one C.sub.1 -C.sub.20 -alkyl (meth)acrylate, one vinyl ester of carboxylic acids of 1 to 20 carbon atoms, one vinylaromatic of up to 20 carbon atoms, one ethylenically unsaturated nitrile of 3 to 6 carbon atoms, one vinyl halide or one nonaromatic hydrocarbon of 4 to 8 carbon atoms having at least 2 conjugated double bonds, c) from 0 to 30% by weight of at least one comonomer having at least one keto or aldehyde group and d) from 0 to 50% by weight of at least one further monomer.

Copolymers crosslinking at room temperature

Nonaqueous polyisocyanate formulation containing

Nonaqueous polyisocyanate formulation

Aqueous dispersions containing a polyurethane and from 5 to 60% by weight, based on the polyurethane, of an adhesion-improving polymer, the polyurethane consisting essentially of

Aqueous polyurethane dispersions

Preparation of aqueous polyurethane dispersions

Aqueous dispersions of a copolymer obtained by free-radical polymerization and containing from 0.01 to 40% w/w of polymerized units of comonomers having at least one aldehyde or keto group, which dispersions contain at least one polyisocyanate in which the isocyanate groups are blocked by oximes.

Aqueous synthetic resin preparation capable of cross-linking at room

Emulsifier-free aqueous polyurethane dispersions are prepared by reacting (a) dihydroxy compounds, (b) diisocyanates and (c) chain extenders to give a prepolymer having terminal isocyanate groups, then reacting the prepolymer with (d) salts of aliphatic aminocarboxylic or -sulfonic acids or amino-containing or hydroxyl-containing tertiary ammonium salts, dispersing the resulting polyurethane in water and, if required, removing the organic solvent by distillation. In the process, an organic condensation resin which is dissolved in a solvent is admixed before the polyurethane obtained is dispersed in water.

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