Fire protection composition and use thereof

Abstract

The invention relates to a composition which contains a binder based on epoxy-thiol. Said claimed composition makes it possible to apply, in a simple and rapid manner, coatings that have the layer thickness required for the respective fire resistance grading, the layer thickness being reduced to a minimum while achieving a good fire protection effect. Said claimed composition is particularly suitable for fire protection, especially as a coating for cables and cable routes for increasing the fire resistance grading.

Claims

1. A fire protection composition comprising: (A) a first constituent comprising at least one multifunctional epoxide resin; (B) a second constituent comprising at least one thiol-functionalized compound as a hardener and at least one amine as a co-hardening agent, wherein the thiol-functionalized compound is selected from the group consisting of glycol-bis(2-mercaptoacetate), glycol-bis(3-mercaptopropionate), 1,2-propyleneglycol-bis(2-mercaptoacetate), 1,2-propyleneglycol-bis(3-mercaptopropionate), 1,3-propyleneglycol-bis(2-mercaptoacetate), 1,3-propyleneglycol-bis(3-mercaptopropionate), tris(hydroxymethyl)methane-tris(2-mercaptoacetate), tris(hydroxymethyl)methane-tris(3-mercaptopropionate), 1,1,1-tris(hydroxymethyl)ethane-tris(2-mercaptoacetate), 1,1,1-tris(hydroxymethyl)ethane-tris(3-mercaptopropionate), 1,1,1-trimethylolpropane-tris(2-mercaptoacetate), ethoxylated 1,1,1-trimethylolpropane-tris(2-mercaptoacetate), propoxylated 1,1,1-trimethylolpropane-tris(2-mercaptoacetate), 1,1,1-trimethylolpropane-tris(3-mercaptopropionate), ethoxylated 1,1,1-trimethylolpropane-tris(3-mercaptopropionate), propoxylated trimethylolpropane-tris(3-mercaptopropionate), 1,1,1-trimethylolpropane-tris(3-mercaptobutyrate), pentaerythritol-tris(2-mercaptoacetate), pentaerythritol-tetrakis(2-mercaptoacetate), pentaerythritol-tris(3-mercaptopropionate), pentaerythritol-tetrakis(3-mercaptopropionate), pentaerythritol-tris(3-mercaptobutyrate), pentaerythritol-tetrakis(3-mercaptopropionate), 2-ethylhexyl thioglycolate, iso-octyl thioglycolate, di(n-butyl)thiodiglycolate, glycol-di-3-mercaptopropionate, 1,6-hexanedithiol, ethyleneglycol-bis(2-mercaptoacetate) and tetra(ethyleneglycol)dithiol, and wherein the at least one amine is selected form the group consisting of primary aliphatic amines, secondary aliphatic amines, polyamines, and combinations thereof; (C) a third constituent comprising at least one ablative fire protection additive; and (D) a fourth constituent comprising a catalyst for the reaction of the epoxide resin with the thio compound, wherein the catalyst is a phenol derivative or a tertiary amine, wherein the ratio of all epoxide groups in the composition to the number of thiol groups in the composition is in the range of 0.2 to 5:1.

2. The intumescent composition according to claim 1, wherein the at least one thio compound is multifunctional.

3. The composition according to claim 1, wherein the at least one multi-functional epoxide resin can be obtained by means of the reaction of polyhydroxy compounds with epihalohydrins and the precursors thereof and has an epoxy equivalent weight (EEW)550 g/val.

4. The composition according to claim 3, wherein the polyhydroxy compound is selected from polyvalent phenols.

5. The composition according to claim 4, wherein the polyhydroxy compound is bisphenol A or bisphenol F or a mixture thereof.

6. The composition according to claim 1, wherein the at least one ablative fire protection additive is selected from the group consisting of LiNO.sub.3.3H.sub.2O, Na.sub.2CO.sub.3H.sub.2O, Na.sub.2CO.sub.3.7H.sub.2O, Na.sub.2CO.sub.3.10H.sub.2O, Na.sub.2Ca(CO.sub.3).sub.2.2H.sub.2O, Na.sub.2Ca(CO.sub.3).sub.2.5H.sub.2O, Na(HCO.sub.3)Na.sub.2CO.sub.3.2H.sub.2O, 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, Ca(SO.sub.4).H.sub.2O, 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, MgSO.sub.4.7H.sub.2O, Mg(OH).sub.2, Al(OH).sub.3, Al(OH).sub.3-3H.sub.2O, AlOOH, Al.sub.2[SO.sub.4].sub.3.nH.sub.2O with n=14-18, KAl(SO.sub.4).sub.2.12H.sub.2O, CaOAl.sub.2O.sub.3.10H.sub.2O, MgCO.sub.3.3H.sub.2O, Ca.sub.2Mg.sub.14(Al.sub.1Fe).sub.4CO.sub.3(OH).sub.42.29H.sub.2O, Ca.sub.3Si(OH).sub.6(SO.sub.4)(CO.sub.3).12H.sub.2O, Mg.sub.2(OH).sub.2CO.sub.3.H.sub.2O, 3CaOAl.sub.2O.sub.3.3CaSO.sub.4.32H.sub.2O, Mg.sub.5(OH).sub.2(CO.sub.3).sub.4.4H.sub.2O, Ca.sub.4Al.sub.2(OH).sub.14.6H.sub.2O, Mg.sub.6Al.sub.2(OH).sub.16CO.sub.3.4H.sub.2O, CaAl.sub.2(OH).sub.4(CO.sub.3).sub.2.3H.sub.2O, Al.sub.14(CO.sub.3).sub.3(OH).sub.36, 3CaO Al.sub.2O.sub.3.6H.sub.2O, NaAl(OH)CO.sub.3, water-containing zeolites, vermiculites, colemanite, perlites, mica, alkaline silicates, borax, modified carbons and graphites, silicic acids and mixtures thereof.

7. The composition according to claim 1, wherein the composition also contains organic and/or inorganic aggregates and/or further additives.

8. The composition according to claim 1, which is made as a two-component or multicomponent system.

9. A method of making a fire protection coating, comprising applying the composition according to claim 1 to a construction element or a structural element.

10. The method according to claim 9, wherein the construction or structure element is made from steel, concrete, wood, or plastic.

11. The method according to claim 9, wherein the construction element or structural element is non-metallic.

12. The method according to claim 9, wherein the construction element or structural element is selected from the group consisting of individual cables, cable bundles, cable routes, cable channels or other lines; and soft fittings.

13. Hardened objects obtained by hardening the composition according to claim 1.

14. The composition according to claim 6, wherein the at least one ablative fire protection additive is Al.sub.2(SO.sub.4).sub.3.nH.sub.2O with n=14-18 and further comprising AlNH.sub.4(SO.sub.4).sub.2.12H.sub.2O.

15. The composition according to claim 1, wherein the composition is intumescent.

Description

EXEMPLARY EMBODIMENTS

(1) The following listed constituents are used for the manufacture of ablative compositions according to the invention. The individual constituents are respectively mixed and homogenized by means of a dissolver. Free standing films have been manufactured by means of scrapers.

(2) In order to determine the fire protection properties, the hardened composition was subjected to a test according to EN ISO 11925-2. The test is carried out in a draft-free Mitsubishi FR-D700SC electric inverter combustion chamber. In the test, a small burner flame is directed at an angle of 45 for 30 seconds on the sample surface which corresponds to surface ignition.

(3) Samples with the dimensions 11 cm29.5 cm and an application thickness of 1 mm are respectively used. These samples hardened at room temperature and were aged for three days at 40 C.

(4) After aging for three days at 40 C., the test is carried out for ignitability and height of the attacked surface.

(5) The hardening time and the hardening progress were determined. In this regard, it was tested with a spatula when the hardening of the coating started.

Example 1

(6) Component A

(7) TABLE-US-00001 Constituents Quantity [g] Epilox F 16-01 .sup.1 26.8 Durcal 5 .sup.2 28.9 .sup.1 Low-molecular epoxide resin on bisphenol F basis (viscosity (25 C.) 1200-1600 mPas (DIN 53 015); epoxide equivalent 157-167 g/equivalent (DIN 16 945)) .sup.2 Calcium carbonate, ground

(8) Component B

(9) TABLE-US-00002 Constituents Quantity [g] Glycol di(3-mercaptopropionate) 10.3 Pentaerythritoltetra(3- 10.1 mercaptopropionate) Ancamine K54 .sup.3 1.4 Durcal 5 28.9 .sup.3 Pentaerythritoltetra(3-mercaptopropionate)

(10) Component C

(11) TABLE-US-00003 Constituent Quantity [g] Aluminum trihydrate .sup.4 14.65 .sup.4 Aluminium trihydrate (HN 434 from the J.M. Huber Corporation, Finland)

Example 2

(12) Component A

(13) TABLE-US-00004 Constituents Quantity [g] Epilox F 16-01 26.8 Durcal 5 37.93

(14) Component B

(15) TABLE-US-00005 Constituents Quantity [g] Glycol di(3-mercaptopropionate) 9.9 Pentaerythritoltetra(3- 10.1 mercaptopropionate) 2,4,6-tris(dimethylaminomethyl)phenol 1.4 Durcal 5 12.6

(16) Component C

(17) TABLE-US-00006 Constituents Quantity [g] Aluminum trihydrate .sup.4 12.7 Magnesium hydroxide 8.8

Example 3

(18) Component A

(19) TABLE-US-00007 Constituents Quantity [g] Epilox F 16-01 26.8 Durcal 5 38.0

(20) Component B

(21) TABLE-US-00008 Constituents Quantity [g] Glycol di(3-mercaptopropionate) 9.8 Pentaerythritoltetra(3- 10.0 mercaptopropionate) 2,4,6-tris(dimethylaminomethyl)phenol 1.4 Durcal 5 12.7

(22) Component C

(23) TABLE-US-00009 Constituents Quantity [g] Aluminum trihydrate 12.8 Exolite AP 755 .sup.5 8.8 .sup.5 Ammonium polyphosphate

Comparative Example 1

(24) A commercial fire protection product (Hilti CFP S-WB) based on aqueous dispersion technology (acrylate dispersion) served as the comparison.

(25) TABLE-US-00010 TABLE 1 Results of the determination of the hardening time Comparative example 1 Example 1 Example 2 Example 3 Hardening 24 h 21 min 19 min 18.5 min time

(26) TABLE-US-00011 TABLE 2 Results of the test according to EN ISO 11925-2 Reaching the 15 cm Example Ignition mark Comparative example 1 No No Example 1 Yes No Example 2 No No Example 3 No No