Abstract: A process for the production of a lignocellulose-containing material, in which, based in each case on the lignocellulose-containing material: A) from 30 to 95% by weight of lignocellulose particles; B) from 1 to 25% by weight of expanded plastic particles having a bulk density in the range from 10 to 150 kg/m3; C) from 1 to 50% by weight of a binder selected from the group consisting of aminoplast resin, phenol-formaldehyde resin and organic isocyanate having at least two isocyanate groups, and optionally D) additives are mixed and are then pressed at elevated temperature and under elevated pressure, wherein the component B) comprises a curing agent for the component C).

Abstract: Flexible, sheet-like substrates having an abrasive surface, which are obtainable by applying an aqueous solution or dispersion of at least one precondensate of a heat-curable resin to the top and/or bottom of a flexible, sheet-like substrate in an amount in the range from 0.1 to 90% by weight, based on the uncoated, dry substrate, crosslinking the precondensate and drying the treated substrate, wherein the aqueous solution or dispersion of at least one precondensate of a heat-curable resin comprises (i) a polymeric thickener selected from the group consisting of biopolymers, associative thickeners and wholly synthetic thickeners in an amount ranging from 0.01% by weight to 10% by weight and optionally (ii) a curative that catalyzes further condensation of the heat-curable resin at from about 60° C.

Abstract: A process for production of an abrasive foam based on a melamine-formaldehyde condensate comprising inorganic nanoparticles, comprising the steps of: (1) preparation of a solution or dispersion comprising a precondensate of the foam to be produced, and also comprising inorganic nanoparticles, (2) foaming of the precondensate via heating of the solution or dispersion from step (1), in order to obtain a foam which comprises inorganic nanoparticles, and also, if appropriate, (3) heat-conditioning of the foam obtained in step (2), leads to improved abrasion in the polishing of delicate surfaces.

Abstract: A light wood-containing material having an average density in the range from 200 to 600 kg/m3, comprising, based in each case on the wood-containing material: A) from 30 to 95% by weight of wood particles; B) from 1 to 15% by weight of a filler having a bulk density in the range from 10 to 100 kg/m3, selected from the group consisting of foamable plastic particles and already foamed plastic particles; C) from 3 to 50% by weight of a binder comprising an aminoplast resin and an organic isocyanate having at least two isocyanate groups and, if appropriate, D) additives.

Abstract: The invention relates to the use of hyperbranched polymers or oligomers comprising terminal primary and/or secondary amino groups as curing agents for epoxy resins. The invention further relates to a composition containing such polymers or oligomers, an uncured or only partially cured epoxy resin, and at least one optional curing agent for epoxy resins, as well as a cured epoxy resin that can be obtained by curing said components. The invention finally relates to a method for curing epoxy resins. In said method, an uncured or only partially cured epoxy resin is brought to a temperature of 5 to 150° C. or is exposed to microwave radiation along with at least one polymer or oligomer according to the definition above and at least one optional conventional curing agent for epoxy resins.

Abstract: A light wood-containing material having an average density in the range from 200 to 600 kg/m3, comprising, based in each case on the wood-containing material: A) from 30 to 95% by weight of wood particles; B) from 1 to 25% by weight of a filler having a bulk density in the range from 10 to 150 kg/m3, selected from the group consisting of foamable plastic particles and already foamed plastic particles; C) from 0.1 to 50% by weight of a binder and, if appropriate, D) additives, the following relationship being true for the d? values according to Rosin-Rammler-Sperling-Bennet of the wood particles A) and of the particles of the filler B): d? of the particles A)?2.5×d? of the particles B).

Abstract: The present invention relates to light wood-base materials comprising from 30 to 92.5% by weight, based on the wood-base material, of wood particles, the wood particles having a mean density of from 0.4 to 0.85 g/cm3, from 2.5 to 20% by weight, based on the wood-base material, of polystyrene and/or of styrene copolymer as a filler, the filler having a bulk density of from 10 to 100 kg/m3, and from 5 to 50% by weight, based on the wood-base material, of a binder, the mean density of the light wood-base material being less than or equal to 600 kg/m3.

Abstract: A process for preparing highly branched melamine polymers, wherein melamine is reacted with 1.5 to 4 mol, per mole of melamine, of one or more diamines or polyamines having at least two primary amino groups, it being possible for up to 25 mol % of the diamines or polyamines to have three or more primary amino groups and for up to 50 mol % of the diamines or polyamines to be replaced by amines having only one primary amino group, in the presence of an acidic catalyst.

Abstract: Flexible, sheet-like substrates having an abrasive surface, which are obtainable by applying an aqueous solution or dispersion of at least one precondensate of a heat-curable resin to the top and/or bottom of a flexible, sheet-like substrate in an amount of at least 5 to 90% by weight, based on the uncoated, dry substrate, crosslinking the precondensate and drying the treated substrate.