Fireproofing sealing mass and use thereof

Abstract

The invention relates to a composition comprising: a binding agent based on an aqueous, or solvent-based polymer dispersion; fireproofing additives comprising a physically acting expanding agent and an ash-crust stabilizer; inorganic fibers; and a spherical filler. The invention also relates to the use of said composition as a sealing mass, in particular as a fireproofing sealing mass.

Claims

1. A composition, comprising: a binding agent based on an aqueous or solvent-based organic polymer dispersion; wherein the binding agent only includes one or more of the organic polymer dispersions, a fireproofing additive, which comprises a physically acting propellant; and an ash crust stabilizer, 0.5 to 3.5% by wt. based on a total weight of said composition, of inorganic fibers having a length of between 2 to 12 mm; and a spherical filler, wherein the spherical filler has an average grain size that is larger than the average grain size of the other solids contained in the composition, except for the physically acting propellant.

2. The composition according to claim 1, wherein the ash crust stabilizer is zinc borate or a phosphorus-containing compound selected from the group consisting of salts of oxoacids of phosphor and esters of oxoacids of phosphor.

3. The composition according to claim 1, wherein a particle size of said spherical filler is >20 μm.

4. The composition according to claim 3, wherein a particle size of said spherical filler is between 40 and 500 μm.

5. The composition according to claim 1, wherein said spherical filler is a lightweight filler with a specific weight of less than 1 kg/L.

6. The composition according to claim 1, wherein said physically acting propellant is at least one selected from the group consisting of a graphite-intercalation compound, a sheet silicate-intercalation compound and vermiculite.

7. The composition according to claim 1, wherein said physically acting propellant is a graphite-intercalation compound.

8. The composition according to claim 1, wherein said ash crust stabilizer is at least one oxoacid of a phosphor selected from the group consisting of orthophosphoric acid, pyrophosphoric acid, triphosphoric acid and polyphosphoric acid.

9. The composition according to claim 1, wherein said ash crust stabilizer is at least one phosphorus-containing compound selected from the group consisting of monoammonium phosphate, diammonium phosphate, ammonium phosphate, melamine resin phosphates, potassium phosphate, melamine phosphate, ammonium polyphosphate and melamine polyphosphates.

10. The composition according to claim 1, wherein said binding agent based on an aqueous or solvent-based polymer dispersion comprises an acrylate-(copolymer)-dispersion.

11. The composition according to claim 1, further comprising other additives and/or fillers.

12. The composition according to claim 1, comprising 0.5 to 3% by wt. of inorganic fibers having a length of between 2 to 12 mm.

13. The composition according to claim 1, wherein the inorganic fibers consist of inorganic fibers having a length of between 2 to 12 mm.

14. The composition according to claim 2, wherein said binding agent based on an aqueous or solvent-based polymer dispersion comprises an acrylate-(copolymer)-dispersion.

15. The composition according to claim 14, wherein the physically acting propellant is at least one selected from the group consisting of a graphite-intercalation compound, a sheet silicate-intercalation compound and vermiculite, and is contained in about 4 to 15% by weight based on the total weight of the composition.

16. The composition according to claim 15, wherein the ash crust stabilizer is a phosphorus-containing compound selected from the group consisting of salts of oxoacids of phosphor and esters of oxoacids of phosphor and is contained in about 5 to 15% by weight based on the total weight of the composition.

17. The composition according to claim 1, wherein the polymer dispersion comprises an aqueous acrylate dispersion, aqueous dispersion or emulsion of urea, formaldehyde or melamine, polyvinyl acetates, polyvinyl alcohols, acrylate nitrile, styrene acrylates, or their copolymers.

18. The composition according to claim 16, wherein the inorganic fibers are glass fibers, silicate fibers, or mineral wool fibers.

19. The composition according to claim 18, wherein the spherical filler is hollow glass beads, foam glass beads, fly ash, ceramic hollow beads, or solid glass beads.

20. The composition according to claim 18, wherein the spherical filler is foam glass beads and the inorganic fibers are glass fibers.

Description

EMBODIMENTS

(1) To evaluate the ash crust stability, slabs having a thickness of about 5 mm are made from the masses and then hardened for 2 weeks at room temperature and another 2 weeks at 50° C. From these slabs, disks having a diameter of 50 mm are punched out. These disks are reduced to ashes on a metal plate at 600′C for 30 min. Then, the formed ash bodies are compressed with a spatula and the rigidity is rated, whereby the rating occurs using a scale of 1 to 6. A rating with a value of 1 means a very low ash crust stability and a rating with a value of 6 means a very high ash crust stability.

(2) Workability is represented by the smoothability, in other words how easily a smooth, visually appealing surface can be produced. Impeding factors are thereby the formation of strings and wrinkles.

(3) The following table depicts the ingredients and their quantities of the comparison compositions and the compositions according to the invention. Furthermore, the table depicts the rating regarding workability of the respective compound and the rating regarding crust stability, i.e., the rigidity of the formed ash crust.

(4) As one can see, the compositions according to the invention (Examples 1-3) are more easily worked and produce relatively hard ash crusts despite the simplified composition of the ash crust stabilizers, compared to the comparison compositions (comparison examples 1-4).

(5) TABLE-US-00001 Comparison Comparison Comparison Comparison example 1 example 2 example 3 example 4 Example 1 Example 2 Example 3 Acrylate dispersion 39.00% 39.00% 39.00% 39.00% 39.00% 39.00% 39.00% Ammonia 25% 0.70% 0.70% 0.70% 0.70% 0.70% 0.70% 0.70% Isotridecanol ethoxylate 0.20% 0.20% 0.20% 0.20% 0.20% 0.20% 0.20% Ammonium acrylate 0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50% Hydroxyethyl cellulose 0.40% 0.40% 0.20% 0.20% 0.20% 0.20% 0.20% Water 4.00% 4.00% 5.40% 5.40% 5.40% 5.40% 5.40% Kaolin 24.80% Chalk 25.10% 37.10% 34.80% 32.80% 22.80% 24.8% Foam glass beads 10.00% 10.00% 10.00% Glass fibers 1.10% 1.10% 2.20% 2.20% 2.20% 2.20% 2.20% Ammonium polyphosphate 10.00% 10.00% 10.00% 10.00% 10.00% Zinc borate 12.00% 12.00% 12.00% Expandable graphite 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% 6.00% Iron oxide 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% 100.00% 100.00% 100.00% 100.00% 100.00% 100.00% 100.00% Workability Good Good Very poor Very poor Very good Very good Very good Crust stability 5 2 6 4 4 6 5