Abstract: Novel sizing compositions, their preparation and use. The compositions contain water-dispersible and/or water-soluble and alkylamine-blocked polyisocyanates, film-forming resins, coupling agents and lubricants. The isocyanates are synthesized from at least one polyisocyanate, at least one ionic and/or potentially ionic and/or nonionic compound, and at least one blocking agent which is at least 20% by weight aralkylamines.

Abstract: The invention relates to aqueous and/or water-dilutable blocked polyisocyanates, their preparation and use in optionally self-crosslinking one-component systems.

Abstract: The present invention relates to thermosetting two-component coating compositions containing A) at least one NCO prepolymer, B) at least one amine-free chain extender, C) at least one catalyst selected from metal 1,3-dicarbonylates and metal-oxo 1,3-dicarbonylates, wherein i) the metal 1,3-dicarbonylate contains as a neutral complex a metal cation with the electron configuration d0 of sub-group 3 or a lanthanide and ii) the metal-oxo 1,3-dicarbonylate contains a metal-oxo cation of sub-group 6 with the electron configuration d0. The present invention also relates to a process for preparing these coating compositions and to coated substrates prepared therefrom.

Abstract: The present invention relates to aliphatic oligocarbonate polyols prepared by the transesterification of organic carbonates with aliphatic polyols in the presence of at least one catalyst which contains i) at least one rare earth metal or compounds thereof or ii) at least one metal of group III B of the periodic table of the elements or compounds thereof or iii) mixtures of i) and ii) and to a process for preparing the same.

Abstract: The present invention relates to additives for preparing straight-chain or acrylonitrile dimer from acrylonitrile and to a process for preparing straight-chain acrylonitrile dimer from acrylonitrile in the presence of the additives according to the invention.

Abstract: The present invention relates to aqueous- or solvent-based, one-component, polyurethane stoving coating compositions containing

Abstract: The present invention relates to thermosetting two-component coating compositions containing

Abstract: The present invention relates to new blocked polyisocyanates with which high-grade, emission-free coatings and lacquer coatings with reduced yellowing values can be obtained, to a method of producing them, and to the use thereof in one-component polyurethane systems, particularly as crosslinking agents in automobile primer surfacers.

Abstract: The present invention relates to a process for preparing polyisocyanates containing acylurea groups by reacting isocyanates corresponding to formula (I)

Abstract: A test method is described for discovering polymer or polymer-forming components having favorable properties. The method comprises the steps of preparing one or more sets of polymer solutions or solutions of polymer-forming components of different composition, introducing a specified volume of the polymer solution or solution of polymer-forming components into a set of sample vessels, forming a polymer film optionally exposing the polymer film to an increased temperature, determining, sequentially or in parallel, one or more physical properties, and selecting the polymer samples having the most favorable properties.

Abstract: The present invention relates to a process for preparing a dinitronaphthalene isomer mixture having an increased proportion of 1,5-dinitronaphthalene by nitrating naphthalene in the presence of at least one ionic liquid.

Abstract: Using the process according to the invention, it is possible to provide, with few reaction steps, a novel route to &agr;-substituted ring systems, which optionally have further substituents.

Abstract: Using the process according to the invention, it is possible to provide, with few reaction steps, a novel route to &agr;-substituted ring systems which optionally have further substituents.