Bayer Materialscience Ag

Covestro Deutschland Ag

Bayer Intellectual Property Gmbh

Rhein Chemie Rheinau Gmbh

Marc Leimenstoll

Harald Blum

Burkhard Köhler

Peter Reichert

Matthias Wintermantel

Eduard Mayer

Sebastian Doerr

Peter Schuster

Evelyn Peiffer

Bernd Kray

Christos Karafilidis

Serdar Uestuenbas

Christian Scheffner

Evelyn Pfeiffer

Burkhardt Köhler

The present invention relates to reactive preparations, comprising isocyanate-functional polyurethane building blocks, to a method for the production thereof, and to the use thereof as or in adhesives having high initial strength and high mechanical strength.

Hot melts

Prepolymers, which are accessible from formamides of low molecular weight di- or triamines (formamide-terminated low molecular weight compounds) and di- or polyisocyanates, of the general formula (II):X&#x2014;[&#x2014;N(CHO)&#x2014;CO&#x2014;NH&#x2014;R&#x2014;NCO]&#x2003;&#x2003;(II)wherein X represents a linear or branched aliphatic, cycloaliphatic, heterocyclic and/or aromatic structural unit having 2 to 40 carbon atoms, and which is optionally further substituted and/or optionally comprises one or more heteroatoms, wherein Rrepresents an organic radical which may optionally contain one or more heteroatoms and which may further contain one or more additional free isocyanate groups and/or one or more urethane, biuret, carbodiimide, isocyanurate, allophanate, iminooxadiazinedione and/or uretdione structural units, and wherein n&#x2267;2; processes for making the same; compositions containing the same; and uses thereof.

Prepolymers based on di- or polyisocyanates and formamide-terminated low molecular weight compounds, processes for preparing the same and uses thereof

The invention relates to novel prepolymers which are accessible from the formamides of oligomeric di- or polyamines (formamide-terminated oligomers) and di- or polyisocyanates.

Prepolymers

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Hilden, Germany

Marc Leimenstoll