Flexible watertight roof coatings

摘要

The invention provides for the use of coating compositions based on one or more mineral binders, one or more polymers, one or more fillers, and, if desired, one or more additives for producing roof coatings, the coating compositions comprising at least 50% by weight of polymers, based on the dry weight of the polymers and of the mineral binders.

主权项

1. A method for producing roof coatings, which comprises applying an aqueous coating composition consisting of water, one or more cements, one or more polymers, one or more fillers, and optionally one or more additives to a substrate;
wherein the polymers are derived from one or more ethylenically unsaturated monomers selected from the group consisting of vinyl esters, (meth)acrylic esters, vinylaromatics, olefins, 1,3-dienes, and vinyl halides, and optionally further monomers copolymerizable therewith, and the one or more polymers are present in the form of a water-redispersible powder or a protective colloid-containing aqueous dispersion; the coating composition comprising from 55 to 90% by weight of the polymers, based on the dry weight of the polymers and of the cements; wherein the one or more cements constitute 10% to 30% by weight of the dry weight of the coating composition; wherein the roof coatings contain no reinforcing fabric, no mats, and no cladding; wherein the one or more fillers are selected from the group consisting of quartz sand, finely ground quartz, finely ground limestone, calcium carbonate, dolomite, chalk, white lime hydrate, talc, granulated rubber, aluminum silicates, corundum, basalt, carbides, materials that give a pozzolanic reaction, hollow glass microbeads, polystyrene beads, aluminosilicates, silicon oxide, aluminum silicon oxide, calcium silicate hydrate, silicon dioxide, aluminum silicate, magnesium silicate, aluminum silicate hydrate, calcium aluminum silicate, calcium silicate hydrate, aluminum iron magnesium silicate, calcium metasilicate, volcanic slags and wollastonites; wherein the one or more additives are selected from the group consisting of pigments, phyllosilicates, highly disperse silicas and fibers; and wherein the substrate is the outer surface of a roof of a building.