Abstract: Described herein are processes for producing cold-flexible polyurethane insulation, in which (a) polyisocyanates are mixed with (b) compounds having groups which are reactive to isocyanates, (c) blowing agents, (d) catalysts, (e) plasticizers and optionally (f) further additives to give a reaction mixture and the mixture is applied to a surface and cured to form insulation. Also described herein is a polyurethane insulation obtainable by a process described herein.

Abstract: Described herein are processes for producing cold-flexible polyurethane insulation, in which (a) polyisocyanates are mixed with (b) compounds having groups which are reactive to isocyanates, (c) blowing agents, (d) catalysts, (e) plasticizers and optionally (f) further additives to give a reaction mixture and the mixture is applied to a surface and cured to form insulation. Also described herein is a polyurethane insulation obtainable by a process described herein.

Abstract: The invention relates to a method for the production of composite elements comprising at least one outer layer a) and a layer b) firmly bonded to it, an adhesion promoter c) being applied between the outer layer a) and the layer b) firmly bonded to it, the outer layer a) being continuously moved and the adhesion promoter c) and the layer b) firmly bonded to it or the starting materials thereof being applied in succession to the outer layer, the application of the adhesion promoter c) being effected by means of a rotating disk which is mounted horizontally or with a slight deviation from the horizontal of up to 15°, wherein the rotating disk is provided with teeth on the edge.

Abstract: The invention relates to a method for the production of composite elements with at least one outer layer a) and a layer b) firmly bonded to it, an adhesion promoter c) being applied between the outer layer a) and the layer b) firmly bonded to it, the outer layer a) being continuously moved and the adhesion promoter c) and the layer b) firmly bonded to it or the starting materials thereof being applied in succession to the outer layer, the application of the adhesion promoter c) being effected a rotating disk which is mounted horizontally or with a slight deviation from the horizontal of up to 15°, wherein the rotating disk is provided with teeth on the edge.

Abstract: The subject matter of the invention is a method for the removal of alkaline or acidic compounds from a solvent-containing metal oxide dispersion, having the following steps: a. conversion of the solvent into gas phase; b. condensation of the solvent; c. bringing the condensed solvent into contact with a neutralizing agent; d. Return of the condensed solvent into the metal oxide dispersion.

Abstract: The invention relates to a method for the production of composite elements comprising at least one outer layer a) and a layer b) firmly bonded to it, an adhesion promoter c) being applied between the outer layer a) and the layer b) firmly bonded to it, the outer layer a) being continuously moved and the adhesion promoter c) and the layer b) firmly bonded to it or the starting materials thereof being applied in succession to the outer layer, the application of the adhesion promoter c) being effected by means of a rotating disk which is mounted horizontally or with a slight deviation from the horizontal of up to 15°, wherein the rotating disk is provided with teeth on the edge.

Abstract: The object of the invention is a method for the production of a nano-scale silicon dioxide, said method comprising the following steps: a) provision of an aqueous suspension of a colloidal silicon dioxide with an average particle size of 1 to 500 nm; b) allowing said suspension to react with an organosilane or organosiloxane in an aprotic cyclic ether and silanization of the colloidal silicon dioxide; c) separation of the aqueous phase of the reaction mixture from the organic phase; d) allowing the organic phase to react again with an organosilane or organosiloxane in an aprotic cyclic ether and silanization of the colloidal silicon dioxide; e) separation of the aqueous phase of the reaction mixture from the organic phase.

Abstract: The subject matter of the invention is a method for the removal of alkaline or acidic compounds from a solvent-containing metal oxide dispersion, having the following steps: a. conversion of the solvent into gas phase; b. condensation of the solvent; c. bringing the condensed solvent into contact with a neutralizing agent; d. Return of the condensed solvent into the metal oxide dispersion.

Abstract: An aqueous polymer dispersion comprises rubber particles and polymer particles having a reinforcing action.

Abstract: An aqueous polymer dispersion comprises rubber particles and polymer particles having a reinforcing action.

Abstract: The present invention relates to a process for preparing a polymer dispersion foam L, where:a) a mixture M which comprises at least one conjugated diene monomer A and at least one ethylenically unsaturated comonomer B is polymerized by free-radical aqueous emulsion polymerization in the presence of at least one emulsifier to give a fine polymer dispersion P,b) the fine polymer dispersion P is pressure-agglomerated to give a coarse polymer dispersion G,c) the polymer dispersion G is concentrated, if desired, and is mixed, if desired, with a reinforcer dispersion H, andd) the dispersion from c) is foamed to give a polymer dispersion foam L,which comprises adjusting the average particle size and the particle size distribution of G by varying a parameter selected from:I) the solids content of P,II) the agglomeration temperature in step b),III) the agglomeration pressure in step b),IV) the content of comonomer B in the mixture M,V) the concentration of the emulsifier in P,VI) the agglomeration throughput,to polyme

Abstract: An aqueous polymer dispersion is prepared by free radical aqueous emulsion polymerization of a mixture of monomers having at least one ethylenically unsaturated group, which comprises at least 30% by weight of monomers having two conjugated ethylenically unsaturated double bonds, by a process in which the polymerization temperature is varied in the course of the free radical aqueous emulsion polymerization.

Abstract: Aqueous polymer dispersions whose polymer is built up ofa) at least 50% by weight of butadiene, isoprene or a mixture thereof,b) at least 10% by weight of an ester of (meth)acrylic acid and a C.sub.1 -C.sub.8 -alkanol andc) from 0 to 10% by weight of other comonomers,where the total amount of monomers a) and b) makes up at least 90% by weight of the total amount of monomers, are useful for producing flame-resistant latex foam rubber which contains only hydrates of inorganic salts as flame retardants.

Abstract: In foams having a density of from 0.01 to 0.2 g/cm.sup.3 and a cell count of from 2 to 1,000 cells/mm.sup.2 and based on an impact copolymer, the impact copolymer consists ofa) from 1 to 55% by weight of a block copolymer ofa.sub.1) from 35 to 65% by weight of ethylene anda.sub.2) from 35 to 65% by weight of propylene andb) from 45 to 99% by weight of a random copolymer ofb.sub.1) from 0.5 to 6% by weight of ethylene and from 94 to 99.5% by weight of propylene, or ofb.sub.2) from 0.5 to 12% by weight of but-1-ene and 88 to 99.5% by weight of propylene.

Abstract: Moldings, in particular foams and fibers, based on melamine/formaldehyde condensation products, in which from 0.1 to 70 mol % of the melamine have been replaced by melamine substituted by from 1 to 3 hydroxyoxaalkyl groups of the formula--(CH.sub.2 --CH.sub.2 --O).sub.n --CH.sub.2 --CH.sub.2 --OHn=1-5)have increased elasticity.

Abstract: Moldings, in particular foams and fibers, based on melamine/formaldehyde condensation products, in which from 0.1 to 70 mol% of the melamine have been replaced by melamine substituted by from 1 to 3 hydroxyoxaalkyl groups of the formula--(CH.sub.2 --CH.sub.2 --O).sub.n --CH.sub.2 --CH.sub.2 --OH (n=1-5)have increased elasticity.

Abstract: Novel foams having a density of from 0.01 to 0.1 g/cm.sup.3, based on a copolymer comprising ethylene, propylene and a C.sub.4 - to C.sub.8 -.alpha.-olefin, and having a torsion modulus of from 100 to 800 N/mm.sup.2 have high tensile, compressive and flexural strengths and at the same time high elongation at break.

Abstract: A flexible foam composite of high flame resistance consists of one or more layers of a flexible melamine resin foam from 4 to 25 g/l in density and one or more layers of a flexible polyimide foam from 8 to 40 g/l in density.