FIRE PROTECTION GLAZING INCLUDING A SECONDARY SEAL HAVING INTUMESCENT FIRE PROTECTION PROPERTY

Abstract

Fire protection glazing made of two or more glass panes spaced apart from each other by a spacer. A fire protection material and the spacer are arranged in an intermediate space between the two glass panes. A secondary seal encloses the fire protection material and the spacer in the intermediate space. The secondary seal has a intumescent fire protection property. Exclusively the fire protection material, the spacer, optionally having an optional spacer attachment for attaching the spacer to the glass pane, and the secondary seal can be arranged in the intermediate space between the two glass panes.

Claims

1. A fire protection glazing made of at least two glass panes spaced apart from each other by a spacer, wherein a fire protection material and the spacer is arranged in an intermediate space between the two glass panes, wherein an secondary seal encloses the fire protection material and the spacer in the intermediate space, wherein the secondary seal has an intumescent fire protection property.

2. The fire protection glazing according to claim 1, wherein the secondary seal is an element for immovably attaching the glass panes spaced apart by the spacer to each other.

3. The fire protection glazing according to claim 1, wherein the secondary seal is different from the spacer.

4. The fire protection glazing according to claim 1, wherein the secondary seal is a single element.

5. The fire protection glazing according to claim 1, wherein the secondary seal is free of a cooling fire protection property, particularly wherein energy for any cooling does not exceed 30%, particularly 20%, particularly 10% of the total energy.

6. The fire protection glazing according to claim 1, wherein exclusively the fire protection material, the spacer, having an optional a spacer attachment for attaching the spacer to the glass pane, and the secondary seal are arranged in the intermediate space between the two glass panes.

7. The fire protection glazing according to claim 1, wherein the secondary seal is arranged in a region of the intermediate space adjacent to the end faces of the glass panes.

8. The fire protection glazing according to claim 1, wherein the secondary seal comprises inorganic material, particularly alkali silicate, which intumesces when a temperature rises in the event of a fire and in this manner achieves at least part of the intumescent fire protection property of the secondary seal.

9. The fire protection glazing according to claim 1, wherein the secondary seal comprises organic material which intumesces when a temperature rises in a fire and in this manner achieves at least part of the intumescent fire protection property of the secondary seal.

10. The fire protection glazing according to claim 9, wherein organic material in the secondary seal is intumescent in case of a temperature rise in a fire due to a chemical reaction of the organic material.

11. The fire protection glazing according to claim 10, wherein organic material intumesces due to a chemical reaction comprises the following materials: an acid source, a char former, a blowing agent, and a binder for binding the above-mentioned materials.

12. The fire protection glazing according to claim 9, wherein organic material in the secondary seal intumesces in case of a temperature rise in a fire due to a physical reaction of the organic material.

13. The fire protection glazing according to claim 12, wherein the organic material comprises exfoliated graphite.

14. The fire protection glazing according to claim 1, wherein the secondary seal comprises a synergistic material.

15. The fire protection glazing according to claim 1, wherein the secondary seal comprises a fire-suppressing material for reducing a portion of further material in the secondary seal.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0168] The object of the invention is explained in further detail below using a preferred embodiment example shown in the attached drawings. They show, schematically in each case:

[0169] FIG. 1 a section side view through a top part of a fire protection glazing according to the invention;

[0170] FIG. 2 the fire protection glazing from FIG. 1 in the same view, installed in a frame;

[0171] FIG. 3 temperature curve of a test measurement.

DETAILED DESCRIPTION OF THE INVENTION

[0172] Identical parts in the figures are fundamentally referenced with the same reference numeral.

[0173] The designations left, right, top, and bottom relate to the plane of the drawing in the figures.

[0174] FIGS. 1 and 2 show the same embodiment example of the fire protection glazing 1 according to the invention. In both FIGS. 1 and 2, a section side view is shown in each case. In addition, both figures of the fire protection glazing 1 show only the top part. That is, from a perpendicularly positioned fire protection glazing 1 (that is, aligned parallel to the direction of gravity), the top part or, in other words, a top end of the fire protection glazing 1 is shown. Other edge regions of the fire protection glazing 1 are designed similarly. The same applies to the frame 10 in FIG. 2: only the top part of the frame 10 is shown. The other parts are designed analogously.

[0175] A part of the fire protection glazing 1 is shown in FIG. 1. Two glass panes 2 arranged in parallel are spaced apart from each other by a spacer 4 arranged between said panes. A fire protection material 3 is present between the two glass panes 2 and below the spacer 4. A secondary seal 5 is arranged entirely between the two glass panes 2 and above the spacer 4. The secondary seal 5 ends at the top flush with end faces of the two glass panes 2.

[0176] The fire protection glazing from FIG. 1 is shown in FIG. 2 in the same view, but now installed in a frame 10. It can be clearly seen in FIG. 2 that the fire protection properties of the fire protection glazing 1 are particularly significant at the edges thereof (only the top edge is shown here). In the edge region of the fire protection glazing 1, where the secondary seal 5 is present, a thermally insulating foam (not shown) can, in case of fire, have a sealing and insulating effect between the fire protection glazing 1 and frame 10 for the installed fire protection glazing 1, where weak points are present due to the design. This is particularly the case at the top edge of the fire protection glazing 1, where particularly difficult circumstances prevail due to convection in case of fire (high levels of heat, flames, smoke) and good fire protection properties are particularly advantageous and helpful.

[0177] In a first embodiment, the secondary seal 5 is made of polysulfide (matrix) and 5 percent by weight of exfoliated graphite (organic material having an intumescent fire protection property). In the present first embodiment, the secondary seal 5 foams up due to a physical effect.

[0178] FIG. 3 shows the results of a benchmark test. A temperature increase ΔT within 30 minutes was measured on the side of the tested fire protection glazing facing away from the fire, outside the mounting element at a top corner of the fire protection glazing. The corresponding temperature increases are shown in FIG. 3: the temperature increase ΔT (in Kelvin) on the side facing away from the fire (cold side) of the fire protection glazing is shown as a function of time t (in minutes), from which the fire resistance duration can be derived.

[0179] The benchmark test was performed on model CF30 fire protection glazing, mounted in the same mounting element (Janisol II frame system having EPDM seals). Said mounting element comprises no additional cooling and/or intumescent element. Only the secondary seal was varied. The fire protection glazing BsR according to the invention comprised a second embodiment of the secondary seal, made of the materials of the table below, implementing the intumescent fire protection effect thereof. Measured values of said fire protection glazing BsR are shown in FIG. 3 as open squares connected by a continuous line.

TABLE-US-00002 Product Weight percent (wt %) DGEBA (bisphenol-A-diglycidylether 29.86 D3415 by Sigma Aldrich) D400 + D2000 (D400 = poly(propylene 27.44 glycol) bis(2-aminopropyl ether), Mn = 400 g/mol. 406678 by Sigma Aldrich (hardener); D2000 = poly(propylene glycol) bis(2-aminopropyl ether), Mn = 2000 g/mol. 406686 by Sigma Aldrich (hardener) AP750 ammonium polyphosphate by 28.5 Clariant Charmor PM15 pentaerythritol by 5.7 Perstorp Melamine by Sigma Aldrich 5.7 Grafguard 160-80N exfoliated graphite 2.8 by NeoGraf

[0180] Two different secondary seals without any intumescent fire protection property were tested for comparison: one was made of pure polysulfide; another was made of pure epoxy. Measured values of the BR-Ps fire protection glazing having the secondary seal made of pure polysulfide are shown in FIG. 3 as open circles connected by a dashed line. Measured values for the BR-Ep fire protection glazing having the secondary seal made of pure epoxy are shown in FIG. 3 as crosses connected by a dashed-dotted line.

[0181] As can be seen, the temperature increases for the fire protection glazings of all three secondary seals are fairly similar for about 20 minutes, then the fire protection glazing BsR having the secondary seal having intumescent fire protection properties shows significantly lower values of temperature increase. After thirty minutes, the fire protection glazing BsR having the secondary seal according to the invention having intumescent fire protection properties shows a temperature increase of 17 Kelvin less than the BR-Ps and BR-Ep fire protection glazings having the other two secondary seals.

[0182] The temperature increase for the BR-Ps and BR-Ep fire protection glazings after 30 minutes is 199.5 Kelvin and 198.67 respectively. The two fire protection glazings having the secondary seals without intumescent fire protection properties are thus not able to achieve any of the fire protection effects according to the EI 30 standard, unless further measures are taken (such as the use of additional intumescent and/or cooling bands). The variant of the fire protection glazing BsR according to the invention having the secondary seal having intumescent fire protection properties, in contrast, only just fails to allow a fire protection effect according to the EI 30 standard to be achieved together with the tested mounting element, without additional measures needing to be taken. This is because the tested fire protection glazing BsR only just fails to fulfill the EI 30 standard due to the last 30 seconds, wherein the temperature increase rises from 177 Kelvin (minute 29.5) to 182 Kelvin (minute 30). By means of a slight variation of the composition (additional intumescent agent in the secondary seal), the EI 30 standard can be met, however, without further measures—such as additional fire protection material in the fire protection glazing and/or mounting element—being necessary.