Abstract: Clay moldings comprise a mineral material based on clay minerals as the main component and at least one hydrophopic, film-forming polymer uniformly distributed in the molding.

Abstract: Moldings comprise a base element consisting of a cement-bound mineral material, which may be modified with polymers, and a mineral coating present on at least one of the main surfaces of the base element and comprising a polymer-modified mineral material which contains at least one clay mineral as the main component and at least one film-forming, hydrophobic polymer distributed in the mineral material.

Abstract: Aqueous formulations comprising as film-forming constituent at least one copolymer P, synthesized from ethylenically unsaturated monomers M, are used for coating shaped mineral articles, the copolymer P having a glass transition temperature in the range from −25 to +80° C. and the monomers M comprising more than 0.2% by weight and up to 5% by weight, based on their overall weight, of itaconic acid as monomer M1.

Abstract: In a process for preserving a mineral molding by coating the surface of the mineral molding with an aqueous composition comprising an aqueous polymer dispersion, the dispersed polymer P comprises an ethylenically unsaturated acid of the 2-acrylamido-2-methylpropanesulfonic acid type polymerized into it in free-radically polymerized form.

Abstract: The invention describes a method of coating a concrete molding which comprises a) the application of at least one plastic, cement-bound mineral composition to an uncoated mineral molding wherein said plastic composition comprises at least one aqueous polymer dispersion and b) bringing about the setting of the plastic composition, wherein the aqueous polymer dispersion comprises: at least one polymer P in the form of dispersed polymer particles with a glass transition temperature of from −20 to +80° C., the polymer containing not more than 2% by weight of copolymerized monoethylenically unsaturated monomers having an acid group.

Abstract: The present invention provides for the use of film-forming aqueous formulations comprising in dispersed form at least one crosslinked copolymer P for coating shaped mineral articles and for a method of coating shaped mineral articles, said copolymer P comprising in copolymerized form a) from 80 to 99.89% by weight of at least one monomer selected from esters of acrylic acid with C1-C12-alkanols, esters of methacrylic acid with C1-C8-alkanols, and monovinylaromatics, b) from 0.1 to 19.99% by weight of at least one monomer different from a), and c) from 0.01 to 1.9% by weight of at least one crosslinking monomer selected from esters of acrylic or methacrylic acid with linear or branched C3-C6-alkenols, cyclic C5-C7-alkenols and polycyclic C2-C12-alkenols.

Abstract: A method of coating a mineral molding includes applying at least one aqueous preparation to at least one surface of the molding, the aqueous preparation including: (i) as film-forming constituent at least one polymer P which is composed of ethylenically unsaturated monomers M and which is present in dispersed form in the aqueous phase of the aqueous preparation and which has a glass transition temperature TG in the range from −25 to +80° C.

Abstract: The invention relates to the use of aqueous compositions comprising:

Abstract: The present invention provides for the use of aqueous film-forming formulations comprising at least one copolymer P as film-forming constituent which is present in disperse form in the formulation and is composed of ethylenically unsaturated monomers M, the monomers M comprising i. from 70 to 99.9% by weight of at least one ester of methacrylic acid with a C1-C10-alkanol and ii. from 0.1 to 30% by weight of at least one different monoethylenically unsaturated monomer and at least 50% by weight of the monomers M being other than methyl methacrylate and not more than 1% by weight of the monomers M having two or more ethylenically unsaturated double bonds, for coating mineral moldings. The present invention additionally provides a method of coating the mineral moldings, and also the mineral moldings themselves.

Abstract: In a process for preserving a mineral molding by coating the surface of the mineral molding with an aqueous composition comprising an aqueous polymer dispersion, the dispersed polymer P comprises an ethylenically unsaturated acid of the 2-acrylamido-2-methylpropanesulfonic acid type polymerized into it in free-radically polymerized form.

Abstract: In a process for preserving a mineral molding by coating the surface of the mineral molding with an aqueous composition comprising an aqueous polymer dispersion, the dispersed polymer P comprises an ethylenically unsaturated acid of the 2-acrylamido-2-methylpropanesulfonic acid type polymerized into it in free-radically polymerized form.

Abstract: The invention describes a method of coating a concrete molding which comprises a) the application of at least one plastic, cement-bound mineral composition to an uncoated mineral molding wherein said plastic composition comprises at least one aqueous polymer dispersion and b) bringing about the setting of the plastic composition, wherein the aqueous polymer dispersion comprises: at least one polymer P in the form of dispersed polymer particles with a glass transition temperature of from −20 to +80° C., the polymer containing not more than 2% by weight of copolymerized monoethylenically unsaturated monomers having an acid group.

Abstract: Aqueous formulations comprising as film-forming constituent at least one copolymer P, synthesized from ethylenically unsaturated monomers M, are used for coating shaped mineral articles, the copolymer P having a glass transition temperature in the range from −25° to +80° C. and the monomers M comprising more than 0.2% by weight and up to 5% by weight, based on their overall weight, of itaconic acid as monomer M1.

Abstract: The present invention relates to a process for coating mineral moldings with film-forming aqueous formulations in which in succession at least one 1st formulation comprising at least one copolymer P1 as binder and at least one inorganic pigment is applied to the mineral molding and, if desired, is dried and then at least one 2nd formulation comprising at least one copolymer P2 as binder and, if desired, inorganic pigment is applied, the copolymers P1 and P2 each being composed of monomers A, B and, if desired, C, wherein identical monomers A and B are selected in each case for the copolymers P1 and P2 and the 1st. formulation has a pigment volume concentration which is greater by at least 10 than that of the 2nd formulation, and to a composition of said 1st and 2nd formulations and to the use of said 1st and 2nd formulations for coating mineral moldings.

Abstract: Radiation-curable preparations comprise at least one polymer which has ethylenically unsaturated double bonds and are used for the coating of mineral moldings.A process for coating mineral moldings, and also mineral moldings which have a coating cured by radiation, are also described.

Abstract: Precast concrete which is coated with a copolymer A with a glass transition temperature of rom -25.degree. to +30.degree. C. and composed ofa) from 0.1 to 10% by weight of a monomer of the formula I ##STR1## where R.sup.1 and R.sup.2 are each --H or C.sub.1 -C.sub.4 -alkyl, R.sup.3 is a bridge of from 1 to 20 carbons,R.sup.4 is --C(O)R.sup.6, --C(O)OR.sup.6 or -CNR.sup.5 is --H, --C(OR)R.sup.9, --C(O)OR.sup.9 or --CNX is --O-- or --NR.sup.7 --,Z is a single bond, --CH.sub.2 --, --O--, --NR.sup.8 -- or --O--C(O)-- andR.sup.6, R.sup.7, R.sup.8 and R.sup.9 are each --H, alkyl, aryl, alkaryl or aralkyl of up to 12 carbons,b) from 85 to 99.

Abstract: Mono- or di-alkyl phosphate or their alkali metal salts or optionally substituted ammonium salts for use as antifoaming and hydrophobizing additives for hydraulic binders.

Abstract: A track or switch tamping machine wherein the machine includes tamping and ramming units having longitudinal ducts for injecting liquid binder into the ballast. The longitudinal ducts terminate in a plate or cavity within the lower portion of the tamping and ramming units. A nozzle is also included in the unit as is means for conveying liquid binder from a storage tank carried on the machine.