Covestro Deutschland Ag

Bayer Materialscience Ag

Bayer Intellectual Property Gmbh

Jan Schönberger

Peter Haas

Sebastian Dörr

Michael Mager

Heike Heckroth

Burkhard Köhler

Thorsten Rische

Thomas Feller

Meike Niesten

Hans-Otto Werling

Burkhard Fugmann

Sascha Plug

Robrecht Froyman

Melita Dietze

Kristine Fraatz

Michael Heckes

Hans-Robert Hehnen

Manfred Jordan

Michal Sabo

Bernd Mayer

The present invention relates to an isocyanate-free multicomponent system, especially for production of foams for medical products such as wound dressings, comprising at least two separate components, the first component comprising at least one alkoxysilane-terminated prepolymer and the second component an aqueous component, and the aqueous component having a pH of 4.0 to 9.5 at 20 DEG C.

Fast-curing alkoxysilane spray foams

The present invention relates to an isocyanate-free multi-component system, in particular for medical uses such as foamable wound coverings, with at least two separate components, wherein the first component comprises at least one alkoxysilane-terminated prepolymer and the second component comprises an aqueous component, wherein the aqueous component is a polyurethane dispersion.

Fast-setting alkoxysilane spray foams

The present invention relates to an alpha-alkoxysilane-terminated prepolymer preparable by reaction of at least one polyether polyol, of a polyisocyanate and of an alpha-alkoxysilane having at least one isocyanate-reactive group, said polyether polyol having a weight average of 500 to 7000 g/mol and having ethylene oxide and propylene oxide units, the proportion of ethylene oxide units being up to 50% by weight based on the polyether polyol. The invention further provides a process for preparing an inventive alpha-alkoxysilane-terminated prepolymer, a composition, a multicomponent system and a spray can comprising an inventive alpha-alkoxysilane-terminated prepolymer, and also a moulding obtainable by polymerization from an inventive alpha-alkoxysilane-terminated prepolymer.

Alpha-alkoxysilane-terminated prepolymer for fast-curing spray foams with improved propellant gas solubility

The invention relates to a specific composition comprising A) isocyanate-functional prepolymers obtainable by reaction of A1) aliphatic diisocyanates with A2) di- to hexa-functional polyalkylene oxides having an ethylene oxide content of 50 to 100 mol %, based on the total amount of the oxyalkylene groups present, B) an aqueous polyurethane suspension, an aqueous polyacrylate suspension or aqueous silica sols, especially for production of hydrophilic, aliphatic polyurethane foams. The invention further provides a process for producing a hydrophilic, aliphatic polyurethane foam, based on the inventive composition, a polyurethane foam obtainable by the process and a wound dressing comprising the polyurethane foam.

Hydrophilic polyurethane foam with low volume swelling

The invention relates to a process for producing polyurethane foams, by frothing and drying mixtures of specific polyurethane dispersions and crosslinkers.

Production of polyurethane foams

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Haan, Germany

Jan Schönberger