FIRE-PROTECTION COMPOSITION AND USE OF THE SAME

Abstract

A fire-protection composition is described that contains a polyurea-based binder. By virtue of the inventive composition, coatings having the layer thickness necessary for the respective fire-resistance duration can be applied simply and quickly, wherein the layer thickness can be reduced to a minimum and nevertheless a good fire-protection effect can be achieved. The inventive composition is suitable in particular for fire protection, especially as a coating of cables and cable runs, in order to increase the fire resistance duration.

Claims

1. A fire-protection composition, comprising: an ingredient A, which contains an isocyanate compound, an ingredient B, which contains a reactive component capable of reacting with an isocyanate compound and which is selected from the group consisting of compounds with at least two amino groups, wherein the amino groups, independently of one another, are primary and/or secondary amino groups, and an ingredient C, which contains an ablatively acting fire-protection additive.

2. The composition according to claim 1, wherein the reactive component capable of reacting with the isocyanate compound is selected from the group consisting of polyamines, polyether polyamines, polyaspartic acid esters and a mixture thereof.

3. The composition according to claim 2, wherein the reactive component capable of reacting with the isocyanate compound is a polyether polyamine, which is selected from among the group consisting of compounds of general formula (I) ##STR00008## in which R is a group of an initiator for oxalkylation with 2 to 12 carbon atoms and 2 to 8 groups containing an active hydrogen atom, T represents hydrogen or a C.sub.1-C.sub.4 alkyl group, V and U, independently of one another, are hydrogen or T, n is a value between 0 and 100, m is a whole number between 2 and 8, wherein m corresponds to the number of groups that contain an active hydrogen atom and that were initially contained in the initiator for oxalkylation.

4. The composition according to claim 2, wherein the reactive component capable of reacting with the isocyanate compound is a polyaspartic acid ester of general formula (VII), ##STR00009## in which R.sup.1 and R.sup.2 may be identical or different and stand for organic groups that are inert toward isocyanate groups, R.sup.3 and R.sup.4 may be identical or different and stand for hydrogen or organic groups that are inert toward isocyanate groups, X stands for an n-valent organic group that is inert toward isocyanate groups, and n stands for a whole number of at least 2.

5. The composition according to claim 4, wherein, in formula (VII), R.sup.1 and R.sup.2, independently of one another, stand for a methyl or ethyl group and R.sup.3 and R.sup.4 each stand for hydrogen.

6. The composition according to claim 4, wherein, in formula (VII), X stands for a group which is obtained by removal of primary amino groups from an aliphatic polyamine.

7. The composition according to claim 1, wherein ingredient B further contains a polyol compound.

8. The composition according to claim 7, wherein the polyol compound is selected from the group consisting of polyester polyols, polyether polyols, hydroxylated polyurethanes, and/or alkanes with at least two hydroxyl groups each per molecule and a mixture thereof.

9. The composition according to claim 1, wherein the isocyanate compound comprises an aliphatic or aromatic skeleton and at least two isocyanate groups or a mixture thereof.

10. The composition according to claim 1, wherein the quantitative ratios of ingredients A and B are chosen such that the equivalent ratio of isocyanate groups of the isocyanate compound to groups, capable of reacting with the isocyanate group, of the reactive component capable of reacting with the isocyanate compound lies between 0.3 and 1.7.

11. The composition according to claim 7, which further contains a catalyst for the reaction between the isocyanate compound and the reactive component capable of reacting with the isocyanate compound and/or the polyol.

12. The composition according to claim 1, wherein the at least one ablatively acting fire-protection additive is selected from the group consisting of LiNO.sub.3.3H.sub.2O, Na.sub.2CO.sub.3.H.sub.2O (thermonatrite), Na.sub.2CO.sub.3.7H.sub.2O, Na.sub.2CO.sub.3.10H.sub.2O (soda), Na.sub.2Ca(CO.sub.3).sub.2.2H.sub.2O (pirssonite), Na.sub.2Ca(CO.sub.3).sub.2.5H.sub.2O (gaylussite), Na(HCO.sub.3)Na.sub.2CO.sub.3.2H.sub.2O (trona), Na.sub.2S.sub.2O.sub.3.5H.sub.2O, Na.sub.2O.sub.3Si.5H.sub.2O, KF.2H.sub.2O, CaBr.sub.2.2H.sub.2O, CaBr.sub.2.6H.sub.2O, CaSO.sub.4.2H.sub.2O (gypsum), Ca(SO.sub.4). ½H.sub.2O (bassanite), Ba(OH).sub.2.8H.sub.2O, Ni(NO.sub.3).sub.2.6H.sub.2O, Ni(NO.sub.3).sub.2.4H.sub.2O, Ni(NO.sub.3).sub.2 2H.sub.2O, Zn(NO.sub.3).sub.2.4H.sub.2O, Zn(NO.sub.3).sub.2.6H.sub.2O, (ZnO).sub.2(B.sub.2O.sub.3).sub.2.3H.sub.2O, Mg(NO.sub.3).sub.2.6H.sub.2O (U.S. Pat. No. 5,985,013 A), MgSO.sub.4.7H.sub.2O (EP1069172A), Mg(OH).sub.2, Al(OH).sub.3, Al(OH).sub.3.3H.sub.2O, AlOOH (boehmite), Al.sub.2[SO.sub.4].sub.3.nH.sub.2O with n=14-18 (U.S. Pat. No. 4,462,831 B), possibly optionally mixed with AlNH.sub.4(SO.sub.4).sub.2.12H.sub.2O (U.S. Pat. No. 5,104,917 A), KA1(SO.sub.4).sub.2.12H.sub.2O (EP1069172A), CaO.Al.sub.2O.sub.3.10H.sub.2O (nesquehonite), MgCO.sub.3.3II.sub.2O (wermlandite), Ca.sub.2Mg.sub.14(Al,Fe).sub.4CO.sub.3(OII).sub.42.29II.sub.2O (thaumasite), Ca.sub.3Si(OH).sub.6(SO.sub.4)(CO.sub.3).12H.sub.2O (artinite), Mg.sub.2(OH).sub.2CO.sub.3.H.sub.2O (ettringite), 3CaO.Al.sub.2O.sub.3.3CaSO.sub.4.32H.sub.2O (hydromagnesite), Mg.sub.5(OH).sub.2(CO.sub.3).sub.4.4H.sub.2O (hydrocalumite), Ca.sub.4Al.sub.2(OH).sub.14.6H.sub.2O (hydrotalcite), Mg.sub.6Al.sub.2(OH).sub.16CO.sub.3.4H.sub.2O alumohydrocalcite, CaAl.sub.2(OH).sub.4(CO.sub.3).sub.2.H.sub.2O scarbroite, Al.sub.14(CO.sub.3).sub.3(OH).sub.36 hydrogarnet, 3CaO.Al.sub.2O.sub.3.6H.sub.2O dawsonite, NaAl(OH)CO.sub.3, water-containing zeolites, vermiculite, colemanite, perlite, mica, alkali silicates, borax, modified carbons, modified graphites, silicas and mixtures thereof.

13. The composition according to claim 1, wherein the composition further contains organic and/or inorganic aggregates and/or a further additive.

14. The composition according to one of the claim, which is packaged as a two-component or multi-component system.

15. A coating, comprising: the composition according to one of claim 1.

16. A construction element, comprising: the coating according to claim 15.

17. The construction element according to claim 16 which is a nonmetallic construction element.

18. The coating according to claim 15 which is a fire-protection coating.

19. A cured object, obtained by curing the composition according to claim 1.

20. A cable, cable bundle, cable run, cable duct, line or soft partition, comprising: the coating according to claim 18.

Description

EXEMPLARY EMBODIMENTS

[0102] The ingredients listed in the following are used to manufacture inventive ablatively acting compositions. The respective individual components are mixed and homogenized by means of a dissolver. For application, these mixtures then are either mixed before spraying or mixed and applied during spraying.

[0103] To determine the fire-protection properties, the cured composition was subjected to a test according to EN ISO 11925-2, while the flammability and dripping behavior were determined according to CEN/TS 45545-2 (HTC SFS test). The test was performed in a Mitsubishi FRD700SC Electric Inverter firebox, set up to be tension-free. During the test, a small burner flame was directed onto the sample surface at an angle of 45° for 30 s. This corresponds to surface flaming.

[0104] Samples with dimensions of 11 cm×29.5 cm and an application thickness of 1 mm were used in each case. These samples were cured at room temperature and aged for three days at 40° C.

[0105] After three days of aging at 40° C., the test was performed for flammability and height of the attacked surface.

[0106] The curing time and the course of curing were determined. For this purpose, a spatula was used to test when curing of the coating began.

[0107] For the following Examples 1 and 2, aluminum trihydrate (HN 434 of J. M. Huber Corporation, Finland) was used as ingredient C, in quantities of 15 g in each case.

EXAMPLE 1

[0108] Ingredient A

TABLE-US-00001 Ingredient Quantity [g] Desmophen ® NH 1420 .sup.1) 34.5 1-Decanol 8.5 Calcium carbonate 45.0 .sup.1) Polyaspartic ester on the basis of a cycloaliphatic amine (amine number 199-203 mg KOH/g (M129-AFAM 2011-06054); viscosity (25° C.) 900-2.000 mPa .Math. s (M068-DIN 53019); equivalent weight 276 g/eq)

[0109] Ingredient B

TABLE-US-00002 Ingredient Quantity [g] Desmodur N 3900 .sup.2) 32.0 Calcium carbonate 15.0 .sup.2) low-viscosity, aliphatic polyisocyanate resin on the basis of hexamethylene diisocyanate (NCO content 23.5 ± 0.5 wt-% (DIN EN ISO 11 909); viscosity (23° C.) 730 ± 100 mPa .Math. s (DIN EN ISO 3219/A.3); equivalent weight approximately 179 g/eq)

EXAMPLE 2

[0110] Ingredient A

TABLE-US-00003 Ingredient Quantity [g] Desmophen NH 1420 31.4 Polyglycol 600 14.6 Calcium carbonate 45

[0111] Ingredient B

TABLE-US-00004 Ingredient Quantity [g] Desmodur N 3900 29.1 Calcium carbonate 15.0

COMPARISON EXAMPLE 1

[0112] A commercial fire-protection product (Hilti CFS SP-WB) based on aqueous dispersion technology (acrylate dispersion) was used for comparison.

TABLE-US-00005 TABLE 1 Results of the determination of curing time, ignition and flame height Example Comparison 1 1 2 Curing time 24 h   30 min 14 min Ignition yes yes yes Flame height 150 mm 110 mm 30 mm