Abstract: Inorganic-organic foams are obtained by foaming a mixture of(a) a 5 to 60% by weight aqueous alkali metal silicate or ammonium silicate solution,(b) a sufficient amount of a conventional hardener for aqueous silicate solutions,(c) a polymer of (meth)acrylic acid or a copolymer of acrylic acid and methacrylic acid or of (meth)acrylic acid and a copolymerizable monomer containing ethylinic double bonds, the polymer and copolymer being soluble in the aqueous silicate solution, some or all the carboxyl groups of the polymer or copolymer, where relevant, being neutralized by a base and the amount of polymer or copolymer being 0.1 to 30 parts per 100 parts of SiO.sub.2 contained in the aqueous silicate solution,(d) a blowing agent,(e) a surfactant having a foaming action and, where relevant,(f) gelling agent for solidifying the foam before hardening and/or conventional fillers, and allowing the foam to harden.The foams can be used as insulating materials in the construction industry.

Abstract: Prepolymers of alkali metal silicates and/or alkaline earth metal silicates and metal oxides, which can be used as molding compositions, preferably compression molding compositions, for the production of compression-molding laminates or of insulating sheets, are obtained by a method wherein a mixture of solid alkali metal silicates and/or alkaline earth metal silicates, and/or aqueous solutions of such silicates, with or without addition of water, and of divalent to tetravalent metal oxides, the ratio of metal oxide to silicate in the mixture being from 1:1 to 1:9, expressed in parts by weight of solids, and the homogenized mixture having a water content of from 10 to 50% by weight, based on the total amount of mixture, is allowed to pre-react in the temperature range of 10.degree. to 50.degree. C. until the water content of the mixture has decreased by from 0.

Abstract: A composition for the treatment of paper which improves the wet strength of paper is provided. This composition contains(a) a water-soluble mono- or binuclear hydantoin compound containing glycidyl groups, and(b) a water-soluble amine with at least two active amine hydrogen atoms, e.g. an aliphatic polyamine, as curing agent.Also a process for the treatment, preferably the surface treatment of paper with the above composition is provided.

Abstract: A composition for the treatment of paper which improves the wet strength of paper is provided. This composition contains(a) a water-soluble mono- or binuclear hydantoin compound containing glycidyl groups, and(b) a water-soluble copolymer of maleic acid or of one of its derivatives such as maleic anhydride and of a further ethylenically unsaturated copolymerizable comonomer with 2 to 20 carbon atoms such as vinyl methyl ether, dec-1-ene, styrene and/or ethylene or a water-soluble salt of such a copolymer.Also a process for the treatment, preferably the surface treatment of paper with the above composition is provided.

Abstract: The invention relates to storage-stable, quick-curing epoxide resin moulding materials containing:A. epoxide resins,B. pre-adducts containing free amino groups and formed from polyamines containing aromatic groups and low-molecular epoxide resins, as curing agents, andC. mineral or organic pulverulent or fibrous fillers, with the epoxide resins and the curing agents softening between 45.degree. and 120.degree. C, and having a melting point higher by 5.degree. to 30.degree. C than the softening point, and being present in the said moulding materials predominantly in the form of particles separated from each other. The moulded articles have good mechanical and dielectrical properties.

Abstract: Storage-Stable moulding compositions which contain solid adducts, containing epoxide groups, of triglycidyl-bis-hydantoins or triglycidyl-bis-dihydrouracils and organic compounds possessing several active hydrogen atoms, solid adducts, containing amino groups, of cycloaliphatic, heterocyclic or aromatic polyamines as curing agents, and fillers. The moulding compositions are used for the manufacture of light-stable and tracking-resistant plastics.

Abstract: The invention relates to storage-stable, quick-curing epoxide resin moulding materials containing:A. pre-adducts containing aromatic constituents and free epoxide groups and formed from epoxide resins and polyamines,B. pre-adducts containing free amino groups and formed from polyamines containing cycloaliphatic or heterocyclic groups with polyglycidyl compounds, as curing agents, andC. mineral or organic pulverulent or fibrous fillers, with the epoxide resin pre-adducts and the curing agents softening between 45.degree. and 120.degree.C, and melting 5.degree. to 30.degree.C above the softening point, and the resin pre-adducts and the curing agents being present in the moulding materials predominantly in the form of particles separated from each other.The moulded articles are distinguished by very good stability to solar and UV rays, and retain their original colour to a very considerable extent even after prolonged irradiation.

Abstract: The subject of the present invention is a hot-curable resin mixture which contains a polyepoxide compound, a dicarboxylic acid and a polycarboxylic acid anhydride and which can be used as an impregnating and laminating resin and as an adhesive but above all as a casting resin.