Self-levelling, anhydrous coating materials for floor surfaces
The invention describes self-levelling, anhydrous coating materials on floor surfaces, consisting of silane-modified polyethers, preferably methoxyalkylsilane-terminated polyoxypropylenes, calcium carbonate powder, drying agent, curing catalyst, adhesion promoter and optionally further additives and/or fillers. The moisture-curing coating materials obtained, preferably used on cement- or calcium sulphate-bound floor surfaces, are distinguished by good adhesion, high sound insulation, a barrier effect against rising moisture and excellent surface planarity, as are desired for the laying of hard floors, in particular laminate or parquet boards.
1. A method of producing a floor comprising the steps of:
(a) applying a self-leveling, anhydrous coating material to a surface, wherein said coating material comprises:
20 to 60% by mass of silane-terminated polyoxyalkylenes comprising a first methoxyalkylsilane-terminated polyoxypropylene having a viscosity of 5 to 10 Pa·s and a second methoxyalkylsilane-terminated polyoxypropylene having a viscosity of 10 to 25 Pa·s, wherein the viscosities are measured at 20° C. and a shear gradient of 1 s −1 :
30 to 70% by mass of calcium carbonate,
0.5 to 5% by mass of drying agent,
0.1 to 5% by mass of curing catalyst, and
0.2 to 5% by mass of adhesion promoter,
wherein the coating material spreads in a self-leveling manner to a height that is the same;
(b) curing said coating material by atmospheric humidity; and
(c) applying a floating hard floor on the cured coating material,
wherein said cured coating material provides noise insulation.
2. The method of claim 1 , wherein the floating hard floor is a laminate or parquet floor.
3. The method of claim 1 , wherein the surface is a subfloor and wherein the self-leveling, anhydrous coating material is applied directly to the sub-floor, resulting in a layer with a thickness of 1 to 3 millimeters.
4. The method of claim 1 , wherein the cured coating material provides a water barrier.
5. The method of claim 1 , wherein the cured coating material provides an even surface for laying floating hard floors.
6. The method of claim 1 , wherein the coating material further comprises cumulatively up to 50% by mass of an amount of colored pigments, plasticizers, dispersants, other fillers and light and heat stabilizers, of mixtures thereof.
7. The method of claim 1 , wherein the cured coating material has a thickness of about 2 millimeters.
8. The method of claim 1 , wherein the calcium carbonate is hydrophobized.
9. The method of claim 1 , wherein the silane-terminated polyoxyalkylenes are present in an amount of 29-36% by mass.
10. The method of claim 1 , wherein the calcium carbonate has a particle size of less than 20 μm.
11. The method of claim 10 , wherein the particle size of calcium carbonate is less than 10 μm.
12. The method of claim 1 , wherein the first methoxyalkylsilane-terminated polyoxypropylene has alkyl groups of up to 10 carbon atoms and the second methoxyalkylsilane-terminated polyoxypropylene has alkyl groups of up to 10 carbon atoms wherein the mass ratio of the first and second methoxyalkylsilane-terminated polyoxypropylenes is from 5:1 to 1:5.
13. The method of claim 12 , wherein the mass ratio of the first and second methoxyalkylsilane-terminated polyoxypropylenes is 2:1.
14. The method of claim 12 , wherein the viscosity of the second methoxyalkylsilane-terminated polyoxypropylene having alkyl groups of up to 10 carbon atoms is 12-20 Pa·s.
15. The method of claim 12 , wherein the viscosity of the second methoxyalkylsilane-terminated polyoxypropylene having alkyl groups of up to 10 carbon atoms is 12-25 Pa·s.