Bayer Aktiengesellschaft

Covestro Deutschland Ag

Bayer Materialscience Ag

Michael Ehlers

Dirk Achten

Harald Blum

Joachim Probst

Joachim Wolff

Christoph Irle

Horst Clemens

Hans-Josef Laas

Reinhard Halpaap

Dieter Mager

Markus Mechtel

Mathias Matner

Rolf William Albach

Holger Casselmann

Reinhard Hertrampf

Adam Pajonk

Sascha Praet

Dorothee Clasen

Rebecca Alina Heil

Rolf Albach

A method for producing a foam body () having an internal structure (), comprising the steps: I) selecting an internal structure () to be formed in the foam body (), the structure comprising a first polymer material; II) providing a foam body (), the foam body () comprising a second polymer material which is different to the first polymer material; III) injecting, by means of an injection means (), a predefined amount of a melt of the first polymer material or a predefined amount of a reaction mixture () which reacts to form the first polymer material at a predefined location inside the foam body (), corresponding to a volume element of the internal structure (); IV) repeating step III) for further predefined locations inside the foam body (), corresponding to further volume elements of the internal structure (), until the internal structure () is formed. The invention also relates to a foam body () which has an internal structure () and is obtainable by the method according to the invention.

Method for producing a foam body having an internal structure

The present invention relates to a polyisocyanurate plastic obtainable by catalytic trimenzation of a polyisocyanate composition A) which contains oligomeric polyisocyanates and is low in monomeric diisocyanates, where the isocyanurate structure content in the polyisocyanate composition A) is at least 50 mol %, based on the sum total of the oligomeric structures from the group consisting of uretdione, isocyanurate, allophanate, biuret, iminooxadiazinedione and oxadiazinetrione structure that are present in the polyisocyanate composition A). The present invention further relates to a transparent element comprising or consisting of the polyisocyanurate plastic. The invention likewise relates to a process for producing the polyisocyanurate plastics.

Polyisocyanurate plastics having high thermal stability

The present invention relates to innovative polyisocyanate mixtures comprising cycloaliphatic structural elements and containing exclusively linear-aliphatically attached free isocyanate groups, to a process for preparing them and to their use as a starting component in the production of polyurethane plastics, more particularly as a crosslinker component in polyurethane coating materials and coatings.

Polyisocyanate mixtures comprising cycloaliphatic structural elements

The invention relates to aqueous reactive 2-component binder combinations for aqueous reactive filler compositions, processes for the preparation of aqueous reactive filler compositions based on aqueous reactive 2-component binder combinations and the use of such filler compositions.

Aqueous reactive putty (I)

Aqueous reactive putties (II)

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Krefeld, Germany

Michael Ehlers