Fire protection composition and use thereof

Abstract

The invention relates to a fire protection composition comprising: a binder based on an aqueous, or solvent-based polymer dispersion; fire protection additives comprising a physically acting expanding agent, a compound containing phosphorus, selected from among salts or esters of phosphorus oxyacids, and glass fiber; and an acid-resistant, inorganic filler. The invention also relates to the use of said composition as a sealing mass, in particular as a fire protection sealing mass.

Claims

1. A composition, comprising: (a) a binder based on an aqueous- or solvent-based polymer dispersion; (b) fire protection additives comprising: (i) a physically acting expanding agent, (ii) a compound containing phosphorus, selected from the group consisting of a salt of a phosphorus oxyacid and an ester of a phosphorus oxyacid, in a quantity of approximately 5 to 15% by weight relative to the total weight of the composition; and (iii) free glass fibers having a length of 2 to 12 mm; and (c) an acid-resistant, inorganic filler selected from the group consisting of kaolin, BaSO.sub.4, CaSO.sub.4, and mixtures thereof; provided that the composition is free of zinc borate and acid-labile fillers.

2. The composition according to claim 1, wherein the phosphorus oxyacid is selected from the group consisting of orthophosphoric acid, pyrophosphoric acid, triphosphoric acid or polyphosphoric acid.

3. The composition according to claim 2, wherein the compound containing phosphorus is selected from the group consisting of monoammonium phosphate, diammonium phosphate, ammonium phosphate, melamine resin phosphates, potassium phosphate, melamine phosphate and melamine polyphosphates.

4. The composition according to claim 1, wherein the physically acting expanding agent is selected from among graphite intercalation compounds and/or sheet silicate intercalation compounds.

5. The composition according to claim 4, wherein the physically acting expanding agent is selected from among graphite intercalation compounds.

6. The composition according to claim 1, wherein the binder based on an aqueous- or solvent-based polymer dispersion comprises an acrylate copolymer dispersion.

7. The composition according to claim 1, which also contains additional additives and/or fillers.

Description

EXEMPLARY EMBODIMENTS

(1) Three compositions were produced with the components shown in Table 1 and filled into cartridges. In terms of the additive, they are additives that are typical for sealing masses, such as anti-foaming agents, emulsifying agents, means for adjusting the pH value, fungicides, anti-freezing agents, dyes/pigments, softening agents and the like.

(2) To assess the crust strength, plates with a thickness of approx. 5 mm were produced from the masses and hardened for 2 weeks at room temperature and another 2 weeks at 50 C. Discs with a diameter of 50 mm were punched out of these plates. These discs were incinerated for 30 minutes on a metal plate at 600 C. Afterwards, the ash bodies that developed were crushed with a spatula and the strength was assessed. An assessment with the value of 1 signifies a very low ash crust stability and an assessment with the value of 6 signifies a very high ash crust stability.

(3) The following table shows the components and the quantities thereof in the comparative composition (comparative example) and the compositions according to the invention (Examples 1, 2). Furthermore, the table shows the results of the assessment of the free expansion at 600 C., the crust strength after incineration at 600 C. and shelf life at room temperature (RT).

(4) As is evident, the comparative composition and the compositions according to the invention show a comparable free expansion at 600 C., however, both the crust stability as well as the shelf life of the compositions according to the invention are better than that of the comparative composition.

(5) TABLE-US-00001 Comparative Example Example Example 1 2 Acrylate dispersion 31.0% 39.0% 39.0% (65% acrylate and by weight by weight by weight 35% water) Alkyd resin 4.1% by weight Softening agent/tackifier 6.0% (Indopol) by weight Additives 3.9% 6.0% 6.0% by weight by weight by weight Calcium carbonate 18.0% by weight Kaolin (Capsil 2004) 37.0% 27.0% by weight by weight Foam glass spheres 10.0% (Poraver 40-125 ) by weight Expandable graphite 5.5% 5.5% 5.5% by weight by weight by weight Talc. 8.0% by weight Zinc borate 12.0% by weight Glass fibers 1.2% 2.2% 2.2% by weight by weight by weight Ammonium 10.0% 10.0% 10.0% polyphosphate by weight by weight by weight Cellulose to which 4% 0.3% 0.3% 0.3% water has been added by weight by weight by weight 100.0% 100.0% 100.0% by weight by weight by weight Free expansion at 600 C. 1:15 1:15 1:15 Crust strength after 5 6 6 incineration at 600 C. Shelf life in cartridges 9 months 18 months 18 months at RT