The invention relates to an aqueous binder composition for mineral fibers comprising at least one polyelectrolytic hydrocolloid.

The invention relates to an aqueous binder composition for mineral fibers comprising at least one polyelectrolytic hydrocolloid.

Disclosed are formaldehyde-free, thermally-curable, alkaline, aqueous binder compositions. Also disclosed are compositions comprising formaldehyde-free, thermally-curable binder compositions, as described herein, applied to non-woven fibers. Uses of the disclosed binder compositions as binders for non-woven fibers are also disclosed.

A curable aqueous composition is disclosed comprising a carbohydrate, a crosslinking agent, and an amine base, wherein the curable aqueous composition has a pH adjusted by the amine base. Further disclosed is a method of forming a curable aqueous solution.

A curable aqueous composition is disclosed comprising a carbohydrate, a crosslinking agent, and an amine base, wherein the curable aqueous composition has a pH adjusted by the amine base. Further disclosed is a method of forming a curable aqueous solution.

The invention relates to an uncured thermal and/or sound insulation product, based on mineral wool, advantageously on glass wool, that is in the form of a ply comprising a mineral wool layer sized by at least one binder, said sized layer having: a surface density, or basis weight, of less than or equal to 350 g/m.sup.2, preferably less than or equal to 300 g/m.sup.2, or less than or equal to 250 g/m.sup.2, and, optionally, greater than or equal to 200 g/m.sup.2, a micronaire of at most 3 under 5 grams, preferably of at most 15 l/min, better still of at most 12 l/min, and of at least 9 l/min, and the ply having a thickness of greater than 10 mm, or greater than or equal to 15 mm, or even greater than or equal to 25 mm. The invention makes it possible to propose a thermal and/or sound insulation product that is lighter while retaining satisfactory thermal and/or sound insulation properties and a good mechanical strength.

The invention relates to an uncured thermal and/or sound insulation product, based on mineral wool, advantageously on glass wool, that is in the form of a ply comprising a mineral wool layer sized by at least one binder, said sized layer having: a surface density, or basis weight, of less than or equal to 350 g/m.sup.2, preferably less than or equal to 300 g/m.sup.2, or less than or equal to 250 g/m.sup.2, and, optionally, greater than or equal to 200 g/m.sup.2, a micronaire of at most 3 under 5 grams, preferably of at most 15 l/min, better still of at most 12 l/min, and of at least 9 l/min, and the ply having a thickness of greater than 10 mm, or greater than or equal to 15 mm, or even greater than or equal to 25 mm. The invention makes it possible to propose a thermal and/or sound insulation product that is lighter while retaining satisfactory thermal and/or sound insulation properties and a good mechanical strength.

The present invention pertains to a rear-ventilated building facade with a load-bearing external wall, with an insulation layer formed from insulation panels and with a facade cladding, wherein the facade cladding is installed by means of a load-bearing structure, forming a rear ventilation gap, at a spaced location from the insulation layer, and wherein the rear ventilation gap is interrupted in the vertical direction by at least one fire barrier, which is configured as a mineral wool panel. It is characterized in that the at least one fire barrier extends over the entire width of the rear ventilation gap, and that the at least one fire barrier has at least one opening extending in the vertical direction in the area of the rear ventilation gap. The present invention further provides a process for manufacturing a rear-ventilated building facade. It is thus possible to perfect a rear-ventilated building facade of this class such that a lastingly reliable fire protection can be achieved with a cost-effective configuration.

The present invention pertains to a rear-ventilated building facade with a load-bearing external wall, with an insulation layer formed from insulation panels and with a facade cladding, wherein the facade cladding is installed by means of a load-bearing structure, forming a rear ventilation gap, at a spaced location from the insulation layer, and wherein the rear ventilation gap is interrupted in the vertical direction by at least one fire barrier, which is configured as a mineral wool panel. It is characterized in that the at least one fire barrier extends over the entire width of the rear ventilation gap, and that the at least one fire barrier has at least one opening extending in the vertical direction in the area of the rear ventilation gap. The present invention further provides a process for manufacturing a rear-ventilated building facade. It is thus possible to perfect a rear-ventilated building facade of this class such that a lastingly reliable fire protection can be achieved with a cost-effective configuration.

An aqueous binder composition is disclosed that includes 5.0% by weight to 50.0% by weight of a monomeric polyol having at least four hydroxyl groups, based on the total solids content of the aqueous binder composition; and at least 50.0% by weight of a cross-linking agent comprising a polymeric polycarboxylic acid having at least two carboxylic acid groups, based on the total solids content of the aqueous binder composition. The aqueous binder composition includes a ratio of molar equivalents of carboxylic acid groups to hydroxyl groups is between 0.15/1.0 and 2.23/1 and has a pH of 2.2 to 4.0 and a viscosity at 40% solids and 25° C. of 10 cP to 60 cP.