Abstract: A process for producing a melamine-formaldehyde foam by heating and foaming an aqueous mixture M using microwave radiation, said mixture M comprising at least one melamine-formal-dehyde precondensate, at least one curative, at least one surfactant, at least one blowing agent and at least one linear polymer with a number average molecular weight Mn in the range from 500 to 10,000 g/mol and at least two functional groups selected from OH, NH2 or COOH as well as a melamine-formaldehyde foam obtainable by this process and its use.

Abstract: A process for producing a melamine-formaldehyde foam by heating and foaming an aqueous mixture M using microwave radiation, said mixture M comprising at least one melamine-formal-dehyde precondensate, at least one curative, at least one surfactant, at least one blowing agent and at least one linear polymer with a number average molecular weight Mn in the range from 500 to 10.000 g/mol and at least two functional groups selected from OH, NH2 or COOH as well as a melamine-formaldehyde foam obtainable by this process and its use.

Abstract: The present invention relates to processes for producing melamine-formaldehyde foams, said processes comprising the steps of: a) producing an aqueous mixture M1) comprising 100 parts by weight of at least one melamine-formaldehyde precondensate, 2 to 4 parts by weight of at least one curative, 0.2 to 5 parts by weight of a surfactant mixture, 0.

Abstract: The present invention relates to melamine-formaldehyde foams comprising hollow microspheres wherein said hollow microspheres have a median particle diameter (D50, volume averaged, Malvern, Fraunhofer diffraction) in the range from 260 ?m to 490 ?m, and also processes for producing these melamine-formaldehyde foams and their uses.

Abstract: Melamine-formaldehyde foams comprise from 80% to 98% by weight of an inorganic filling material, wherein the % by weight are based on the total weight of inorganic filling material plus melamine-formaldehyde precondensate used for foam production.

Abstract: The present invention relates to processes for producing melamine-formaldehyde foams, said processes comprising the steps of: a) producing an aqueous mixture M1) comprising 100 parts by weight of at least one melamine-formaldehyde precondensate, 2 to 4 parts by weight of at least one curative, 0.2 to 5 parts by weight of a surfactant mixture, 0.

Abstract: Melamine/formaldehyde foams comprising from 0.01% to 45% by weight of a particulate filling material having an average particle diameter in the range from 5 ?m to 3 mm, wherein the % by weight are based on the total weight of filling material plus melamine-formaldehyde precondensate used for foam production.

Abstract: The present invention relates to melamine-formaldehyde foams comprising hollow microspheres wherein said hollow microspheres have a median particle diameter (D50, volume averaged, Malvern, Fraunhofer diffraction) in the range from 260 ?m to 490 ?m, and also processes for producing these melamine-formaldehyde foams and their uses.

Abstract: Melamine-formaldehyde foams comprise from 80% to 98% by weight of an inorganic filling material, wherein the % by weight are based on the total weight of inorganic filling material plus melamine-formaldehyde precondensate used for foam production.

Abstract: The invention relates to processes for producing a melamine-formaldehyde foam comprising the consecutive steps a) and b): a) heating a mixture comprising a melamine-formaldehyde precondensate, a curative and a blowing agent to foam up and crosslink said mixture, and b) tempering the foam obtained in step a), wherein it is essential to the present invention that step a) utilizes a precondensate which has a melamine:formaldehyde molar ratio in the range from 1:2,1 to 1:3.9, and which has a sulfite group content, based on the total weight of the melamine-formaldehyde precondensate, in the range from 0% to 1% by weight, and said tempering in step b) is effected at a temperature in the range from 230 to 290° C., and also to melamine-formaldehyde foams obtainable according to the processes of the invention, and to uses thereof.

Abstract: The present invention relates to a process for producing resilient compressed foamed material based on melamine-formaldehyde resins, which comprises a melamine-formaldehyde precondensate being foamed and the soft, uncured melamine-formaldehyde foamed material being compressed and subsequently dried and optionally heat treated.

Abstract: Foams and moldings comprising foamed support materials selected from the group consisting of polyurethane resins, polyester resins, epoxides and also fiber nonwovens, woven materials and open-cell, two- and three-dimensional networks composed of mineral, animal, vegetable and chemical (natural/synthetic) fibers or mixtures thereof comprising melamine/formaldehyde resins as foamable reactive resin.

Abstract: Process for producing molded foams from melamine/formaldehyde condensation products by subjecting melamine/formaldehyde precondensates to foaming under reduced pressure and subsequent irradiation.

Abstract: Novel melamine-formaldehyde foams comprising microcapsules built into the structure of the condensation products and also processes for the production thereof and uses thereof.

Abstract: The invention relates to aqueous dispersions of water-soluble polymers of N-vinyl-carboxamides, which are substantially salt-free and comprise anionic polymeric stabilizers having a comb-like molecular structure, processes for the preparation of the dispersions in the presence of anionic polymeric stabilizers having a comb-like molecular structure and the use of the dispersions as retention aids or fixing agents in papermaking.

Abstract: The invention relates to aqueous dispersions of water-soluble polymers of N-vinyl-carboxamides, which are substantially salt-free and comprise anionic polymeric stabilizers having a comb-like molecular structure, processes for the preparation of the dispersions in the presence of anionic polymeric stabilizers having a comb-like molecular structure and the use of the dispersions as retention aids or fixing agents in papermaking.