Coating Systems

Abstract

The invention provides coating systems comprising a) a base layer, b) middle layer and c) top layer, whereby each of the layers a), b) and c) is based on mineral binder, filler, polymers from one or more ethylenically unsaturated monomers and optional further additives, and whereby the middle layer contains additionally light weight aggregates.

1 . Coating systems comprising a) a base layer, b) a middle layer and c) a top layer, whereby each of the layers a), b) and c) is based on mineral binder, filler, polymers from one or more ethylenically unsaturated monomers and optional further additives, and whereby the middle layer contains additionally light weight aggregates. 
     
     
         2 . Coating systems according to  claim 1 , characterized in that one or more light weight aggregates are selected from the group comprising vermiculite, perlite, poraver glass beads, hollow glass spheres, natural lightweight aggregate, expanded clays, shales and sintered pulverised fuel ash. 
     
     
         3 . Coating systems according to  claim 1  or  2 , characterized in that the polymers are applied in form of polymer compositions containing one or more polymers from ethylenically unsaturated monomers and one or more hydrophobicizing additives H) from the group comprising H1) fatty acids or fatty acid derivatives and H2) organosilicon compounds. 
     
     
         4 . Coating systems according to  claims 1  to  3 , characterized in that the polymers from ethylenically unsaturated monomers are based on one or more monomers from the group comprising vinyl esters of carboxylic acids having from 1 to 15 carbon atoms, methacrylic esters or acrylic esters of carboxylic acids with unbranched or branched alcohols having from 1 to 15 carbon atoms, olefins and dienes, vinylaromatics and vinyl halides. 
     
     
         5 . Coating systems according to  claims 1  to  4 , characterized in that the fillers have average diameters of from 0.01 to 4 mm. 
     
     
         6 . Coating systems according to  claims 1  to  5 , characterized in that the formulation for the preparation of the base layer a) contains 5% to 25% by weight of one or more mineral binders, 10% to 30% by weight of one or more polymers, and 50% to 85% by weight of one or more fillers, and optionally 0.01% to 5% by weight of one or more additives, the amounts in % by weight in the formulation adding up to 100% by weight. 
     
     
         7 . Coating systems according to  claims 1  to  6 , characterized in that the formulation for the preparation of the middle layer b) contains 30% to 70% by weight of one or more mineral binders, 0.1% to 10% by weight of one or more polymers, and 10% to 50% by weight of one or more light weight aggregates, 10% to 30% by weight of one or more fillers other than light weight aggregate, and optionally 0% to 5% one or more additives, the amounts in % by weight in the formulation adding up to 100% by weight. 
     
     
         8 . Coating systems according to  claims 1  to  7 , characterized in that the formulation for the preparation of the middle layer b) contains additionally one or more superfine fillers selected from the group comprising micro silica, silica flour and calcium carbonate. 
     
     
         9 . Coating systems according to  claims 1  to  8 , characterized in that the formulation for the preparation of the top layer c) contains 35% to 50% by weight of one or more mineral binders, 1% to 5% by weight of one or more polymers and/or polymer compositions containing one or more hydrophobicizing additives H), and 40% to 60% by weight of one or more fillers, and optionally 0% to 5% by weight of one or more additives, the amounts in % by weight in the formulation adding up to 100% by weight. 
     
     
         10 . Coating systems according to  claims 1  to  9 , characterized in that at least one polymer of the top layer c) contains one or more monomer units selected from the group comprising vinyl chloride, vinyl ester and ethylene. 
     
     
         11 . Coating systems according to  claims 1  to  10 , characterized in that the thickness of the base layer a) is 0.1 to 1 cm, the thickness of the middle layer b) is 1 to 5 cm, the thickness of the top layer c) is 0.1 to 1 cm. 
     
     
         12 . Coating systems according to  claims 1  to  11 , characterized in that the coating systems are roofing systems. 
     
     
         13 . Processes for the preparation of the coating systems according to  claims 1  to  12 , characterized in that an underground is coated with one or more layers of coating agent a), upon which one or more layers of coating agent b) are applied, upon which one or more layers of coating agent c) are applied.