Bayer Aktiengesellschaft

Bayer Materialscience Ag

Otto Ganster

Jurgen Schwindt

Walter Meckel

Heinrich Konigshofen

Ulrich Knipp

Horst Stepanski

Eduard Hansel

Klaus Konig

Gerhard Grogler

Richard Kopp

Alfred Neuhaus

Bruno Luckas

Rainer Trinks

Werner Rasshofer

Hanns-Peter Muller

Wolfgang Henning

Hans-Joachim Meiners

Gunter Arend

Jose Colinas-Martinez

Heinz-Werner Lucas

J&ouml;rg B&uuml;chner

Lutz Schmalstieg

Klaus Nachtkamp

Bernhard Jansen

Ludwig Rottmaier

Holger Meyborg

Rudolf Hombach

Jörg Büchner

Reiner Paul

James M Barnes

Knut Panskus

Klaus Recker

Horst Muller-Albrecht

Klaus Seel

Hans-Dieter Ruprecht

Ralph Ostarek

Hans J Meiners

Bernhard Rentz

Willi Eifler

Johannes Koster

Friedhelm Pilger

G&uuml;nther Sachau

Ralf Werner

Reiner Witkowski

Jochen Werner Kenndoff

Eduard Haensel

Gerd Sahler

Brund Luckas

Manfred Mengal

Preparations of surface-deactivated solid isocyanates which are dispersed in finely particulate manner, with aqueous isocyanate-reactive polymer dispersions that include

Adhesives

The present invention relates to an aqueous dispersion containing an isocyanate-reactive polymer and a polyisocyanate, wherein the polyisocyanate has a melting or softening point of >30&deg; C. and is in the form of a finely divided powder having a mean particle diameter of less than 100 &mgr;m. The present invention also relates to an adhesive composition containing this dispersion and to a process for bonding substrates with this composition.

Adhesive compositions

The invention relates to improved hydrophilic, polyurethane gel substances and foams, the use of polyurethane gel substances for pressure-distributing, in particular self-adhesive polyurethane-(foam) gels, and the use of said polyurethane gel substances for moulded structures and adhesive coatings.

Hydrophilic, self-adhesive polyurethane gel substances

The invention relates to aqueous crosslinking polymer dispersions which are characterized in that they consist of

Aqueous crosslinking polymer dispersions and their use for the

The present invention is directed to a novel adhesive which is a mixture of

Mixtures of aqueous polymer dispersions

The present invention relates to solvent-free two-component polyurethane adhesive systems with high initial strengths and low levels of migration derived from a select reactants comprising a hydroxyl polyester and an isocyanate containing prepolymer.

Solvent-free, two-component polyurethane adhesive systems

The invention relates to a process for bonding surfaces with isocyanate-containing prepolymers having an isocyanate group content of less than 1.8% by weight, based on the prepolymer, and an average molecular weight MW.sub.n of at least 4,500 in which (a) the prepolymers are prepared by the reaction of (i) polyester diols prepared from dodecanedioic acid and even-numbered alkane diols containing at least 6 carbon atoms and (ii) diisocyanates; (b) the prepolymer is applied as a hotmelt adhesive at a temperature of 80 to 160.degree. C. by spin-spraying onto at least one surface to be bonded; and (c) the treated surface is brought into intimate contact with a second surface to be bonded.

Hotmelt bonding process

Disclosed herein are two-component polyurethane reactive compositions containing polyisocyanates and components carrying active hydrogen which are stabilized against separation with a compound in solution containing a NH group or NH.sub.2 group and a C--N multiple bond or N--N multiple bond.

Two-component polyurethane reactive compositions

Disclosed herein is a two-component polyurethane adhesive containing an isocyanate component a), an active hydrogen containing component which is stable against demixing b), optionally a catalyst for the reaction of a) with b) and optionally an auxiliary agent and an additive, characterized in that an active hydrogen containing component which is stable against demixing b) contains at least one hydroxyl group-containing low molecular weight chain lengthening agent having at least one C-C double bond or C-C triple bond and having a molecular weight of at least 86 and a functionality of at least 2 and containing no carboxyl groups.

Two-component polyurethane adhesives

Disclosed herein is an adhesive and a process for bonding with the adhesive containing an isocyanate prepolymer a), an isocyanate reactive component b) and a catalyst for the reaction of a) and b), characterized in that the catalyst comprises a compound corresponding to the following formula ##STR1## wherein R.sup.1 and R.sup.2 may be identical of different and denote an alkyl group having 1 to 4 carbon atoms,

Process for bonding substrates of glass fiber reinforced polyester resin

Disclosed herein is a process for bonding substrates comprising applying a hot-melt adhesive to the surface of at least one of the substrates and contacting the surface of said substrate with the surface of the other substrate, said adhesive containing an ester group-containing polyisocyanate which is a solid below 30.degree. C. and liquid above 100.degree. C., corresponding to formula (I)

A process for bonding substrates with an ester group-containing hot melt

The invention relates to crosslinking isocyanates for polymeric adhesives containing a mixture of triisocyanatotriphenyl methane and trimerization products of 2,4-tolylene diisocyanate containing at least 50% triisocyanatomonoisocyanurate and less than 1% free tolylene diisocyanate.

Crosslinking agents for polymeric adhesives

The present invention relates to reactive systems comprising

Reactive systems and a process for the preparation of polyurethane

This invention relates to crystalline, isocyanate group-containign hot melt adhesives based on

Hot melt adhesives

Disclosed herein is a transparent adhesive containing isocyanate groups based on at least one polyol and at least one polyisocyanate, characterized in that the adhesive contains urea groups.

Adhesives based on polyols and polyisocyanates

Growing community of inventors

Odenthal, Germany

Otto Ganster