COMPOSITION FOR A LOW SHRINKAGE PASTY FILL AND FINISHING MATERIAL, PASTY FILL AND FINISHING MATERIAL, AND METHOD FOR PRODUCING A PASTY FILL AND FINISHING MATERIAL

Abstract

The invention relates to a composition for a pasty fill and finishing material, a pasty fill and finishing material, and a method for producing a pasty fill and finishing material. The composition comprises at least one filler, at least one binding agent, and additives, wherein the at least one filler has a density dependent flowability (ff.sub.ρ) value of from 3 to 20.

Claims

1. A composition for a pasty fill and finishing material, comprising at least one filler, at least one binding agent, and additives, wherein the at least one filler has a density dependent flowability (ff.sub.ρ) value of from 3 to 20.

2. The composition according to claim 1, wherein the at least one filler is a hollow, spherical aluminum silicate.

3. The composition according to claim 2, wherein the composition comprises 1.0 to 10.0% by weight of the total composition of the hollow, spherical aluminum silicate and/or wherein the spherical aluminum silicate comprises aluminum oxide of from 5 to 35% by weight of the hollow, spherical aluminum silicate and/or silicon dioxide of from 50 to 80% by weight of the hollow, spherical aluminum silicate.

4. The composition according to claim 1, wherein the composition further comprises at least a second and a third filler, wherein the second and the third filler of the composition comprise at least a first and a second carbonate, wherein the particle size distribution of the first carbonate is different from the particle size distribution of the second carbonate and/or wherein the first and the second carbonate are selected from a group consisting of calcium carbonate, calcium magnesium carbonate or any mixture thereof.

5. The composition according to claim 4, wherein the first carbonate has a D98 value of from 70 to 120 μm and/or the second carbonate has a D98 value of from 140 to 180 μm.

6. The composition according to claim 4, wherein the first and/or the second carbonate has/have a D50 value of from 10 to 30 μm.

7. The composition according to claim 2, wherein the hollow, spherical aluminum silicate has a D50 value of from 90 to 200 μm and/or has a D98 value of from 150 to 400 μm.

8. The composition according to claim 1, wherein the at least one binding agent is selected from a group consisting of poly(ethylene-vinyl acetate), polyvinyl acetate, polyacrylate, polyvinyl alcohol or any combinations thereof, preferably poly(ethylene-vinyl acetate), polyvinyl alcohol or any combinations thereof, and/or wherein the composition comprises 0.1 to 20.0% by weight of the total composition, preferably 1 to 15.0% by weight of the total composition, more preferably 1.5 to 10.0% by weight of the total composition, most preferably 2 to 5% by weight of the total composition of the at least one binding agent.

9. The composition according to claim 1, wherein the composition further comprises at least a fourth filler, wherein this fourth filler is selected from the group consisting of sepiolite, attapulgite, talc, vermiculite, montmorillonite, illite, kaolinite or hectorite, preferably attapulgite or sepiolite, and/or wherein the composition comprises 0.1 to 10.0% by weight of the total composition of a fourth filler.

10. The composition according to claim 1, wherein the composition further comprises cellulose.

11. The composition according to claim 1, wherein the composition further comprises at least a fifth filler, wherein this fifth filler is selected from the group consisting of calcium sulfate dihydrate, calcium carbonate, calcium magnesium carbonate and perlite, preferably perlite, and/or wherein the composition comprises of from 1.0% to 40% by weight of the total composition of at least a fifth filler.

12. The composition according to claim 11, wherein the fifth filler is perlite and the perlite are micronized and expanded perlite with a particle size D98 of less than 200 μm, and/or wherein the perlites have an amphiphilic coating.

13. The composition according to claim 1, wherein the composition further comprises of from 0.1 to 1.0% by weight of the total composition of an additive consisting of a blend of alkoxylated nonionic compounds, nonionic fatty compounds, and hydrophobic silica.

14. A pasty fill and finishing material, in particular physically drying sprayable fill and finishing material, prepared from the composition according to claim 1.

15. A method for producing a pasty fill and finishing material, in particular a pasty fill and finishing material according to claim 14, wherein the method is based on a two-stage process, according to which in a first step dry components are homogenized, and in a second step, the homogenized dry components are added to aqueous or water-dilutable components.

16. The composition for a pasty fill and finishing material according to claim 1, wherein the at least one filler has a density dependent flowability (ff.sub.ρ) value of from 6 to 8.

17. The composition for a pasty fill and finishing material according to claim 1, wherein the at least one filler has a density dependent flowability (ff.sub.ρ) value of from 5 to 10.

18. The composition for a pasty fill and finishing material according to claim 4, wherein the first carbonate has a D98 value of from 80 to 100 μm and/or the second carbonate has a D98 value of from 150 to 170 μm and wherein the first and/or the second carbonate has/have a D50 value of from 15 to 25 μm.

19. The composition according to claim 2, wherein the hollow, spherical aluminum silicate has a D50 value of from 100 to 180 μm and/or has a D98 value of from 170 to 250 μm.

20. The composition according to claim 1, wherein the composition further comprises from 0.1 to 0.4% by weight of the total composition of an additive consisting of a blend of alkoxylated nonionic compounds, nonionic fatty compounds, and hydrophobic silica.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0059] FIG. 1 shows a state of the art pasty fill and finishing materials brought up on a concrete surface with bubble formation and

[0060] FIG. 2 shows an inventive pasty fill and finishing material brought up on a concrete surface without bubble formation.

[0061] For all three FIGS. 1a, 1b and 2 pasty fill and finishing material is sprayed on concrete with defects (concrete elements commercially available for example from Bosch Beton GmbH & Co. KG) using the “airless application method” described before. In FIG. 1 state of the art pasty fill and finishing materials were used: FIG. 1a represents a regular weight example according to table 1 and FIG. 1b represents a lightweight example according to table 1. In FIG. 2 an inventive pasty fill and finishing material according to table 1 has been used. In FIG. 1 the pasty fill and finishing materials covers the defects without filling them. Therefore, bubble formation occurs from compressed air, as explained above. In FIG. 2 with the inventive pasty fill and finishing material, the defects were filled and thus no bubble formation is visible. The pictures of the three coated surfaces have been taken after 24 hours after application.

[0062] Further, the pasty sprayable fill and finishing material having a composition according to an embodiment of the present invention further provides at a layer thickness of 1 to 3 mm a homogeneous surface for optionally following decorative coatings.

[0063] Further, post-thickening, as indicated by the difference in viscosity, is reduced to about ⅓ for the pasty filler according to the invention compared to the pasty fill and finishing material according to the state of the art. Both, the pasty fill and finishing material according to the invention and the pasty filler according to the state of the art, comprise micronized and expanded perlites. The perlites used in the inventive filler are treated with an amphiphilic coating, whereas the perlites used in the state of the art filler an amphiphilic coating is not apparent.

[0064] The amphiphilic coating was achieved with a silicone micro-emulsion comprising amino-alkyl functional polydimethylsiloxane.

[0065] Stated (measured) values like e.g. a carbonate commercially available stating a D50 value of 20 μm is considered to be about 20 μm, depending on the accuracy of the measurements.