Abstract: High-functionality highly branched or hyperbranched polyesters based on di-, tri- or polycarboxylic acids and di-, tri- or polyols, processes for preparing them, and their use.

Abstract: High-functionality highly branched or hyperbranched polyesters based on di-, tri- or polycarboxylic acids and di-, tri- or polyols, processes for preparing them, and their use.

Abstract: The present invention relates to new, allophanate-group-containing polyisocyanates based on isophorone diisocyanate and to their use.

Abstract: The present invention relates to improved water-dispersible polyisocyanates intended more particularly for two-component polyurethane coating materials.

Abstract: The present invention relates to color-stable curing agent compositions for polyurethane coating materials.

Abstract: The present invention describes a process for preparing water-emusifiable polyisocyanate.

Abstract: A tensioner for a traction drive includes a cylinder arranged in a housing at a distance to a housing wall to thereby define an interior space which contains hydraulic fluid. A piston is received in the cylinder for back-and-forth movement and bounds a pressure chamber containing hydraulic fluid. The piston has a cylinder-distal end which is operatively connected to a spring-biased tension roller supported on a traction member. Formed between the piston and the cylinder is a leakage gap, and a reservoir for hydraulic fluid is provided in an area of the leakage gap to prevent ingress of air into the pressure chamber, when the traction drive is at a rest.

Abstract: The present invention relates to highly branched or hyperbranched polyesters of specific construction, based on mono-, di-, tri- or polycarboxylic acids or derivatives thereof and mono-, di-, tri-, tetra- or polyols, to processes for preparing them, and to their use.

Abstract: The present invention relates to a novel process for preparing colorless, isocyanurate group-comprising polyisocyanates of (cyclo)aliphatic diisocyanates.

Abstract: A high-functionality, highly branched or hyperbranched polycarbonate that has a weight average molecular weight of between 3,300 and 150,000, a degree of crosslinking of less than 15%, and a degree of branching ranging from 10% to 99.9%; the polycarbonate being made by a process comprising preparing one or more condensation products (K), and intermolecularly reacting the one or more condensation products (K) to form the polycarbonate.

Abstract: Hyperbranched polycarbonates having stabilizing groups, prepared by reaction of (a) at least one compound having at least three alcoholic hydroxyl groups per molecule with (b) at least one reagent of the general formula I (c) and at least one reagent of the general formula X3-(A1)m-X4, where the variables are defined as follows: X1, X2 are identical or different and are selected from among halogen, C1-C10-alkoxy, C6-C10-aryloxy and O—C(?O)-halogen, X3 is a functional group selected from among OH, SH, NH2, NH—C1-C4-alkyl, iso-cyanate, epoxy, COOH, COOR12, C(?O)—O—C(?O), C(?O)—Cl, R12 is C1-C4-alkyl or C6-C10-aryl, A1 is a spacer or a single bond, m is zero or one. X4 is a group selected from among phenol groups, benzophenones, aromatic amines and nitrogen-comprising heterocycles, in each case substituted or unsubstituted.

Abstract: High-functionality highly branched or hyperbranched polyesters based on di-, tri- or polycarboxylic acids and di-, tri- or polyols, processes for preparing them, and their use.

Abstract: High-functionality highly branched or hyperbranched polyesters based on di-, tri- or polycarboxylic acids and di-, tri- or polyols, processes for preparing them, and their use.

Abstract: The present invention relates to coating compositions which comprise 2,4?-diisocyanatodiphenylmethane, to processes for preparing them, and to their use.

Abstract: Stabilizers composed of (I) one or more polyisocyanates having an average of from 2 to 10 isocyanate groups per molecule, preferably from 2.1 to 10, particularly preferably from 2.2 to 10, (II) per mole of isocyanate groups, from 0.1 to 1.0 mol of one or more active ingredient groups which protect plastics from degradation via heat, UV radiation, oxidation, hydrolysis, or mechanical action during processing, where the active ingredient groups have been linked to the polyisocyanates by way of functional groups A which can react with the isocyanate groups, and where the active ingredient groups have been selected from phenols, sterically hindered amines (HALS stabilizers), benzotriazoles, benzophenones, aromatic amines, or phosphites; (III) per mole of isocyanate groups, from 0 to 0.9 mol of one or more auxiliary groups which modify the properties of the stabilizer, where the auxiliary groups have been linked to the polyisocyanates by way of functional groups B which can react with the isocyanate groups.

Abstract: Hydrocarbon streams are hydrogenated catalytically without using a different solvent from the hydrocarbon stream to be hydrogenated, with a basic compound being added to the starting-material stream. The formation of undesired secondary components on the catalyst is thereby effectively prevented.

Abstract: High-functionality highly branched or hyperbranched polyesters based on di-, tri- or polycarboxylic acids and di-, tri- or polyols, processes for preparing them, and their use.