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Hartmut Nefzger, Pulheim DE

Hartmut Nefzger, Pulheim DE

Patent application numberDescriptionPublished
20080300377Process for the preparation of Thermoplastic Polyurethanes based on 1,5-Naphthalene-Diisocyanate - Thermoplastic polyurethanes (TPU) based on NDI are prepared by reacting specific, storage-stable NDI-based NCO prepolymers with chain extenders and granulating the largely reacted and cooled reaction melt. The TPU granules can then be processed to form shaped articles.12-04-2008
20080306176NCO Prepolymers Having A Low Content Of Free Monomeric Diisocyanate, And The Production Thereof - The present invention relates to NCO prepolymers having a low content of free monomeric diisocyanate, to a process for the production of these NCO) prepolymers, to polyurethanes prepared from these NCO prepolymers and to processes for the production of these polyurethanes.12-11-2008
20090018256POLYURETHANE AND POLYURETHANE UREA ELASTOMERS BASED ON POLYCARBONATE POLYOLS - The present invention relates to high-quality polyurethane and polyurethane urea elastomers which exhibit unique combinations of processing characteristics, oxidation resistance, mechanical and mechanical/dynamic properties in particularly demanding applications. These polyurethane elastomers and polyurethane urea elastomers are based on novel polycarbonate polyols.01-15-2009
20090131606POLYURETHANE/POLYUREA ELASTOMERS BASED ON 2,4'-DIPHENYLMETHANE DIISOCYANATE PREPOLYMERS AND THE PRODUCTION THEREOF - The present invention relates to polyurethane/polyurea elastomers (PU elastomers) having improved processing characteristics, such as for example extended casting time and reduced brittleness, and occupational health and safety advantages, such elastomers being suitable for replacing elastomers based on TDI prepolymers in comparable applications, and to a process for their production and their use.05-21-2009
20090221071Polyurea Systems, Processes for Preparing the Same and Use Thereof for Postoperative Adhesion Barriers - Polyurea systems comprising: (a) an amino-functional aspartic ester of the general formula (I)09-03-2009
20100022739Impression Compounds - The present invention relates to impression compounds based on polyether derivatives, a process for their production and their use.01-28-2010
20100137552POLY(ETHER-ESTER) POLYOLS AND PROCESSES FOR THEIR PRODUCTION - The invention is directed to novel poly(ethcr-ester) polyols, processes for their production from monocarboxylic or polycarboxylic acid esters with one or more bound polyether chain(s). This invention also relates to the production of polyurethane materials in which the isocyanate-reactive component comprises these poly(ether-ester)polyols.06-03-2010
20100273908NCO PREPOLYMERS HAVING A LOW CONTENT OF FREE MONOMERIC DIISOCYANATE, AND THE PRODUCTION THEREOF - The present invention relates to NCO prepolymers having a low content of free monomeric diisocyanate, to a process for the production of these NCO prepolymers, to polyurethanes prepared from these NCO prepolymers and to processes for the production of these polyurethanes.10-28-2010
20100280212POLYMER DISPERSIONS IN POLYESTER POLYOLS - The present invention relates to polymer dispersions in polyester polyols, a process for producing them and their use for the production of polyurethanes, in particular microcellular polyurethanes. These polyester polyols have sulfur atoms and are free of olefinically unsaturated groups.11-04-2010
20110133598ELECTROMECHANICAL TRANSDUCER COMPRISING A POLYURETHANE POLYMER WITH POLYTETRAMETHYLENE GLYCOL ETHER UNITS - The present invention provides an electromechanical transducer comprising a dielectric elastomer with contact by a first electrode and a second electrode, said dielectric elastomer comprising a polyurethane polymer comprising the reaction product of A) a polyisocyanate and/or B) a polyisocyanate prepolymer with C) a compound having at least two isocyanate-reactive groups wherein the polyisocyanate prepolymer B) and/or the compound C) having at least two isocyanate-reactive groups comprise polytetramethylene glycol ether units of the formula (I):06-09-2011

Patent applications by Hartmut Nefzger, Pulheim DE